yading@10: /* yading@10: * DCA compatible decoder yading@10: * Copyright (C) 2004 Gildas Bazin yading@10: * Copyright (C) 2004 Benjamin Zores yading@10: * Copyright (C) 2006 Benjamin Larsson yading@10: * Copyright (C) 2007 Konstantin Shishkov yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: #include yading@10: #include yading@10: #include yading@10: yading@10: #include "libavutil/channel_layout.h" yading@10: #include "libavutil/common.h" yading@10: #include "libavutil/float_dsp.h" yading@10: #include "libavutil/internal.h" yading@10: #include "libavutil/intreadwrite.h" yading@10: #include "libavutil/mathematics.h" yading@10: #include "libavutil/samplefmt.h" yading@10: #include "avcodec.h" yading@10: #include "fft.h" yading@10: #include "get_bits.h" yading@10: #include "put_bits.h" yading@10: #include "dcadata.h" yading@10: #include "dcahuff.h" yading@10: #include "dca.h" yading@10: #include "mathops.h" yading@10: #include "synth_filter.h" yading@10: #include "dcadsp.h" yading@10: #include "fmtconvert.h" yading@10: #include "internal.h" yading@10: yading@10: #if ARCH_ARM yading@10: # include "arm/dca.h" yading@10: #endif yading@10: yading@10: //#define TRACE yading@10: yading@10: #define DCA_PRIM_CHANNELS_MAX (7) yading@10: #define DCA_SUBBANDS (64) yading@10: #define DCA_ABITS_MAX (32) /* Should be 28 */ yading@10: #define DCA_SUBSUBFRAMES_MAX (4) yading@10: #define DCA_SUBFRAMES_MAX (16) yading@10: #define DCA_BLOCKS_MAX (16) yading@10: #define DCA_LFE_MAX (3) yading@10: #define DCA_CHSETS_MAX (4) yading@10: #define DCA_CHSET_CHANS_MAX (8) yading@10: yading@10: enum DCAMode { yading@10: DCA_MONO = 0, yading@10: DCA_CHANNEL, yading@10: DCA_STEREO, yading@10: DCA_STEREO_SUMDIFF, yading@10: DCA_STEREO_TOTAL, yading@10: DCA_3F, yading@10: DCA_2F1R, yading@10: DCA_3F1R, yading@10: DCA_2F2R, yading@10: DCA_3F2R, yading@10: DCA_4F2R yading@10: }; yading@10: yading@10: /* these are unconfirmed but should be mostly correct */ yading@10: enum DCAExSSSpeakerMask { yading@10: DCA_EXSS_FRONT_CENTER = 0x0001, yading@10: DCA_EXSS_FRONT_LEFT_RIGHT = 0x0002, yading@10: DCA_EXSS_SIDE_REAR_LEFT_RIGHT = 0x0004, yading@10: DCA_EXSS_LFE = 0x0008, yading@10: DCA_EXSS_REAR_CENTER = 0x0010, yading@10: DCA_EXSS_FRONT_HIGH_LEFT_RIGHT = 0x0020, yading@10: DCA_EXSS_REAR_LEFT_RIGHT = 0x0040, yading@10: DCA_EXSS_FRONT_HIGH_CENTER = 0x0080, yading@10: DCA_EXSS_OVERHEAD = 0x0100, yading@10: DCA_EXSS_CENTER_LEFT_RIGHT = 0x0200, yading@10: DCA_EXSS_WIDE_LEFT_RIGHT = 0x0400, yading@10: DCA_EXSS_SIDE_LEFT_RIGHT = 0x0800, yading@10: DCA_EXSS_LFE2 = 0x1000, yading@10: DCA_EXSS_SIDE_HIGH_LEFT_RIGHT = 0x2000, yading@10: DCA_EXSS_REAR_HIGH_CENTER = 0x4000, yading@10: DCA_EXSS_REAR_HIGH_LEFT_RIGHT = 0x8000, yading@10: }; yading@10: yading@10: enum DCAXxchSpeakerMask { yading@10: DCA_XXCH_FRONT_CENTER = 0x0000001, yading@10: DCA_XXCH_FRONT_LEFT = 0x0000002, yading@10: DCA_XXCH_FRONT_RIGHT = 0x0000004, yading@10: DCA_XXCH_SIDE_REAR_LEFT = 0x0000008, yading@10: DCA_XXCH_SIDE_REAR_RIGHT = 0x0000010, yading@10: DCA_XXCH_LFE1 = 0x0000020, yading@10: DCA_XXCH_REAR_CENTER = 0x0000040, yading@10: DCA_XXCH_SURROUND_REAR_LEFT = 0x0000080, yading@10: DCA_XXCH_SURROUND_REAR_RIGHT = 0x0000100, yading@10: DCA_XXCH_SIDE_SURROUND_LEFT = 0x0000200, yading@10: DCA_XXCH_SIDE_SURROUND_RIGHT = 0x0000400, yading@10: DCA_XXCH_FRONT_CENTER_LEFT = 0x0000800, yading@10: DCA_XXCH_FRONT_CENTER_RIGHT = 0x0001000, yading@10: DCA_XXCH_FRONT_HIGH_LEFT = 0x0002000, yading@10: DCA_XXCH_FRONT_HIGH_CENTER = 0x0004000, yading@10: DCA_XXCH_FRONT_HIGH_RIGHT = 0x0008000, yading@10: DCA_XXCH_LFE2 = 0x0010000, yading@10: DCA_XXCH_SIDE_FRONT_LEFT = 0x0020000, yading@10: DCA_XXCH_SIDE_FRONT_RIGHT = 0x0040000, yading@10: DCA_XXCH_OVERHEAD = 0x0080000, yading@10: DCA_XXCH_SIDE_HIGH_LEFT = 0x0100000, yading@10: DCA_XXCH_SIDE_HIGH_RIGHT = 0x0200000, yading@10: DCA_XXCH_REAR_HIGH_CENTER = 0x0400000, yading@10: DCA_XXCH_REAR_HIGH_LEFT = 0x0800000, yading@10: DCA_XXCH_REAR_HIGH_RIGHT = 0x1000000, yading@10: DCA_XXCH_REAR_LOW_CENTER = 0x2000000, yading@10: DCA_XXCH_REAR_LOW_LEFT = 0x4000000, yading@10: DCA_XXCH_REAR_LOW_RIGHT = 0x8000000, yading@10: }; yading@10: yading@10: static const uint32_t map_xxch_to_native[28] = { yading@10: AV_CH_FRONT_CENTER, yading@10: AV_CH_FRONT_LEFT, yading@10: AV_CH_FRONT_RIGHT, yading@10: AV_CH_SIDE_LEFT, yading@10: AV_CH_SIDE_RIGHT, yading@10: AV_CH_LOW_FREQUENCY, yading@10: AV_CH_BACK_CENTER, yading@10: AV_CH_BACK_LEFT, yading@10: AV_CH_BACK_RIGHT, yading@10: AV_CH_SIDE_LEFT, /* side surround left -- dup sur side L */ yading@10: AV_CH_SIDE_RIGHT, /* side surround right -- dup sur side R */ yading@10: AV_CH_FRONT_LEFT_OF_CENTER, yading@10: AV_CH_FRONT_RIGHT_OF_CENTER, yading@10: AV_CH_TOP_FRONT_LEFT, yading@10: AV_CH_TOP_FRONT_CENTER, yading@10: AV_CH_TOP_FRONT_RIGHT, yading@10: AV_CH_LOW_FREQUENCY, /* lfe2 -- duplicate lfe1 position */ yading@10: AV_CH_FRONT_LEFT_OF_CENTER, /* side front left -- dup front cntr L */ yading@10: AV_CH_FRONT_RIGHT_OF_CENTER,/* side front right -- dup front cntr R */ yading@10: AV_CH_TOP_CENTER, /* overhead */ yading@10: AV_CH_TOP_FRONT_LEFT, /* side high left -- dup */ yading@10: AV_CH_TOP_FRONT_RIGHT, /* side high right -- dup */ yading@10: AV_CH_TOP_BACK_CENTER, yading@10: AV_CH_TOP_BACK_LEFT, yading@10: AV_CH_TOP_BACK_RIGHT, yading@10: AV_CH_BACK_CENTER, /* rear low center -- dup */ yading@10: AV_CH_BACK_LEFT, /* rear low left -- dup */ yading@10: AV_CH_BACK_RIGHT /* read low right -- dup */ yading@10: }; yading@10: yading@10: enum DCAExtensionMask { yading@10: DCA_EXT_CORE = 0x001, ///< core in core substream yading@10: DCA_EXT_XXCH = 0x002, ///< XXCh channels extension in core substream yading@10: DCA_EXT_X96 = 0x004, ///< 96/24 extension in core substream yading@10: DCA_EXT_XCH = 0x008, ///< XCh channel extension in core substream yading@10: DCA_EXT_EXSS_CORE = 0x010, ///< core in ExSS (extension substream) yading@10: DCA_EXT_EXSS_XBR = 0x020, ///< extended bitrate extension in ExSS yading@10: DCA_EXT_EXSS_XXCH = 0x040, ///< XXCh channels extension in ExSS yading@10: DCA_EXT_EXSS_X96 = 0x080, ///< 96/24 extension in ExSS yading@10: DCA_EXT_EXSS_LBR = 0x100, ///< low bitrate component in ExSS yading@10: DCA_EXT_EXSS_XLL = 0x200, ///< lossless extension in ExSS yading@10: }; yading@10: yading@10: /* -1 are reserved or unknown */ yading@10: static const int dca_ext_audio_descr_mask[] = { yading@10: DCA_EXT_XCH, yading@10: -1, yading@10: DCA_EXT_X96, yading@10: DCA_EXT_XCH | DCA_EXT_X96, yading@10: -1, yading@10: -1, yading@10: DCA_EXT_XXCH, yading@10: -1, yading@10: }; yading@10: yading@10: /* extensions that reside in core substream */ yading@10: #define DCA_CORE_EXTS (DCA_EXT_XCH | DCA_EXT_XXCH | DCA_EXT_X96) yading@10: yading@10: /* Tables for mapping dts channel configurations to libavcodec multichannel api. yading@10: * Some compromises have been made for special configurations. Most configurations yading@10: * are never used so complete accuracy is not needed. yading@10: * yading@10: * L = left, R = right, C = center, S = surround, F = front, R = rear, T = total, OV = overhead. yading@10: * S -> side, when both rear and back are configured move one of them to the side channel yading@10: * OV -> center back yading@10: * All 2 channel configurations -> AV_CH_LAYOUT_STEREO yading@10: */ yading@10: static const uint64_t dca_core_channel_layout[] = { yading@10: AV_CH_FRONT_CENTER, ///< 1, A yading@10: AV_CH_LAYOUT_STEREO, ///< 2, A + B (dual mono) yading@10: AV_CH_LAYOUT_STEREO, ///< 2, L + R (stereo) yading@10: AV_CH_LAYOUT_STEREO, ///< 2, (L + R) + (L - R) (sum-difference) yading@10: AV_CH_LAYOUT_STEREO, ///< 2, LT + RT (left and right total) yading@10: AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER, ///< 3, C + L + R yading@10: AV_CH_LAYOUT_STEREO | AV_CH_BACK_CENTER, ///< 3, L + R + S yading@10: AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER | AV_CH_BACK_CENTER, ///< 4, C + L + R + S yading@10: AV_CH_LAYOUT_STEREO | AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT, ///< 4, L + R + SL + SR yading@10: yading@10: AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER | AV_CH_SIDE_LEFT | yading@10: AV_CH_SIDE_RIGHT, ///< 5, C + L + R + SL + SR yading@10: yading@10: AV_CH_LAYOUT_STEREO | AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT | yading@10: AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER, ///< 6, CL + CR + L + R + SL + SR yading@10: yading@10: AV_CH_LAYOUT_STEREO | AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT | yading@10: AV_CH_FRONT_CENTER | AV_CH_BACK_CENTER, ///< 6, C + L + R + LR + RR + OV yading@10: yading@10: AV_CH_FRONT_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER | yading@10: AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_BACK_CENTER | yading@10: AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT, ///< 6, CF + CR + LF + RF + LR + RR yading@10: yading@10: AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_CENTER | yading@10: AV_CH_FRONT_RIGHT_OF_CENTER | AV_CH_LAYOUT_STEREO | yading@10: AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT, ///< 7, CL + C + CR + L + R + SL + SR yading@10: yading@10: AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER | yading@10: AV_CH_LAYOUT_STEREO | AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT | yading@10: AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT, ///< 8, CL + CR + L + R + SL1 + SL2 + SR1 + SR2 yading@10: yading@10: AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_CENTER | yading@10: AV_CH_FRONT_RIGHT_OF_CENTER | AV_CH_LAYOUT_STEREO | yading@10: AV_CH_SIDE_LEFT | AV_CH_BACK_CENTER | AV_CH_SIDE_RIGHT, ///< 8, CL + C + CR + L + R + SL + S + SR yading@10: }; yading@10: yading@10: static const int8_t dca_lfe_index[] = { yading@10: 1, 2, 2, 2, 2, 3, 2, 3, 2, 3, 2, 3, 1, 3, 2, 3 yading@10: }; yading@10: yading@10: static const int8_t dca_channel_reorder_lfe[][9] = { yading@10: { 0, -1, -1, -1, -1, -1, -1, -1, -1}, yading@10: { 0, 1, -1, -1, -1, -1, -1, -1, -1}, yading@10: { 0, 1, -1, -1, -1, -1, -1, -1, -1}, yading@10: { 0, 1, -1, -1, -1, -1, -1, -1, -1}, yading@10: { 0, 1, -1, -1, -1, -1, -1, -1, -1}, yading@10: { 2, 0, 1, -1, -1, -1, -1, -1, -1}, yading@10: { 0, 1, 3, -1, -1, -1, -1, -1, -1}, yading@10: { 2, 0, 1, 4, -1, -1, -1, -1, -1}, yading@10: { 0, 1, 3, 4, -1, -1, -1, -1, -1}, yading@10: { 2, 0, 1, 4, 5, -1, -1, -1, -1}, yading@10: { 3, 4, 0, 1, 5, 6, -1, -1, -1}, yading@10: { 2, 0, 1, 4, 5, 6, -1, -1, -1}, yading@10: { 0, 6, 4, 5, 2, 3, -1, -1, -1}, yading@10: { 4, 2, 5, 0, 1, 6, 7, -1, -1}, yading@10: { 5, 6, 0, 1, 7, 3, 8, 4, -1}, yading@10: { 4, 2, 5, 0, 1, 6, 8, 7, -1}, yading@10: }; yading@10: yading@10: static const int8_t dca_channel_reorder_lfe_xch[][9] = { yading@10: { 0, 2, -1, -1, -1, -1, -1, -1, -1}, yading@10: { 0, 1, 3, -1, -1, -1, -1, -1, -1}, yading@10: { 0, 1, 3, -1, -1, -1, -1, -1, -1}, yading@10: { 0, 1, 3, -1, -1, -1, -1, -1, -1}, yading@10: { 0, 1, 3, -1, -1, -1, -1, -1, -1}, yading@10: { 2, 0, 1, 4, -1, -1, -1, -1, -1}, yading@10: { 0, 1, 3, 4, -1, -1, -1, -1, -1}, yading@10: { 2, 0, 1, 4, 5, -1, -1, -1, -1}, yading@10: { 0, 1, 4, 5, 3, -1, -1, -1, -1}, yading@10: { 2, 0, 1, 5, 6, 4, -1, -1, -1}, yading@10: { 3, 4, 0, 1, 6, 7, 5, -1, -1}, yading@10: { 2, 0, 1, 4, 5, 6, 7, -1, -1}, yading@10: { 0, 6, 4, 5, 2, 3, 7, -1, -1}, yading@10: { 4, 2, 5, 0, 1, 7, 8, 6, -1}, yading@10: { 5, 6, 0, 1, 8, 3, 9, 4, 7}, yading@10: { 4, 2, 5, 0, 1, 6, 9, 8, 7}, yading@10: }; yading@10: yading@10: static const int8_t dca_channel_reorder_nolfe[][9] = { yading@10: { 0, -1, -1, -1, -1, -1, -1, -1, -1}, yading@10: { 0, 1, -1, -1, -1, -1, -1, -1, -1}, yading@10: { 0, 1, -1, -1, -1, -1, -1, -1, -1}, yading@10: { 0, 1, -1, -1, -1, -1, -1, -1, -1}, yading@10: { 0, 1, -1, -1, -1, -1, -1, -1, -1}, yading@10: { 2, 0, 1, -1, -1, -1, -1, -1, -1}, yading@10: { 0, 1, 2, -1, -1, -1, -1, -1, -1}, yading@10: { 2, 0, 1, 3, -1, -1, -1, -1, -1}, yading@10: { 0, 1, 2, 3, -1, -1, -1, -1, -1}, yading@10: { 2, 0, 1, 3, 4, -1, -1, -1, -1}, yading@10: { 2, 3, 0, 1, 4, 5, -1, -1, -1}, yading@10: { 2, 0, 1, 3, 4, 5, -1, -1, -1}, yading@10: { 0, 5, 3, 4, 1, 2, -1, -1, -1}, yading@10: { 3, 2, 4, 0, 1, 5, 6, -1, -1}, yading@10: { 4, 5, 0, 1, 6, 2, 7, 3, -1}, yading@10: { 3, 2, 4, 0, 1, 5, 7, 6, -1}, yading@10: }; yading@10: yading@10: static const int8_t dca_channel_reorder_nolfe_xch[][9] = { yading@10: { 0, 1, -1, -1, -1, -1, -1, -1, -1}, yading@10: { 0, 1, 2, -1, -1, -1, -1, -1, -1}, yading@10: { 0, 1, 2, -1, -1, -1, -1, -1, -1}, yading@10: { 0, 1, 2, -1, -1, -1, -1, -1, -1}, yading@10: { 0, 1, 2, -1, -1, -1, -1, -1, -1}, yading@10: { 2, 0, 1, 3, -1, -1, -1, -1, -1}, yading@10: { 0, 1, 2, 3, -1, -1, -1, -1, -1}, yading@10: { 2, 0, 1, 3, 4, -1, -1, -1, -1}, yading@10: { 0, 1, 3, 4, 2, -1, -1, -1, -1}, yading@10: { 2, 0, 1, 4, 5, 3, -1, -1, -1}, yading@10: { 2, 3, 0, 1, 5, 6, 4, -1, -1}, yading@10: { 2, 0, 1, 3, 4, 5, 6, -1, -1}, yading@10: { 0, 5, 3, 4, 1, 2, 6, -1, -1}, yading@10: { 3, 2, 4, 0, 1, 6, 7, 5, -1}, yading@10: { 4, 5, 0, 1, 7, 2, 8, 3, 6}, yading@10: { 3, 2, 4, 0, 1, 5, 8, 7, 6}, yading@10: }; yading@10: yading@10: #define DCA_DOLBY 101 /* FIXME */ yading@10: yading@10: #define DCA_CHANNEL_BITS 6 yading@10: #define DCA_CHANNEL_MASK 0x3F yading@10: yading@10: #define DCA_LFE 0x80 yading@10: yading@10: #define HEADER_SIZE 14 yading@10: yading@10: #define DCA_MAX_FRAME_SIZE 16384 yading@10: #define DCA_MAX_EXSS_HEADER_SIZE 4096 yading@10: yading@10: #define DCA_BUFFER_PADDING_SIZE 1024 yading@10: yading@10: /** Bit allocation */ yading@10: typedef struct { yading@10: int offset; ///< code values offset yading@10: int maxbits[8]; ///< max bits in VLC yading@10: int wrap; ///< wrap for get_vlc2() yading@10: VLC vlc[8]; ///< actual codes yading@10: } BitAlloc; yading@10: yading@10: static BitAlloc dca_bitalloc_index; ///< indexes for samples VLC select yading@10: static BitAlloc dca_tmode; ///< transition mode VLCs yading@10: static BitAlloc dca_scalefactor; ///< scalefactor VLCs yading@10: static BitAlloc dca_smpl_bitalloc[11]; ///< samples VLCs yading@10: yading@10: static av_always_inline int get_bitalloc(GetBitContext *gb, BitAlloc *ba, yading@10: int idx) yading@10: { yading@10: return get_vlc2(gb, ba->vlc[idx].table, ba->vlc[idx].bits, ba->wrap) + yading@10: ba->offset; yading@10: } yading@10: yading@10: typedef struct { yading@10: AVCodecContext *avctx; yading@10: /* Frame header */ yading@10: int frame_type; ///< type of the current frame yading@10: int samples_deficit; ///< deficit sample count yading@10: int crc_present; ///< crc is present in the bitstream yading@10: int sample_blocks; ///< number of PCM sample blocks yading@10: int frame_size; ///< primary frame byte size yading@10: int amode; ///< audio channels arrangement yading@10: int sample_rate; ///< audio sampling rate yading@10: int bit_rate; ///< transmission bit rate yading@10: int bit_rate_index; ///< transmission bit rate index yading@10: yading@10: int downmix; ///< embedded downmix enabled yading@10: int dynrange; ///< embedded dynamic range flag yading@10: int timestamp; ///< embedded time stamp flag yading@10: int aux_data; ///< auxiliary data flag yading@10: int hdcd; ///< source material is mastered in HDCD yading@10: int ext_descr; ///< extension audio descriptor flag yading@10: int ext_coding; ///< extended coding flag yading@10: int aspf; ///< audio sync word insertion flag yading@10: int lfe; ///< low frequency effects flag yading@10: int predictor_history; ///< predictor history flag yading@10: int header_crc; ///< header crc check bytes yading@10: int multirate_inter; ///< multirate interpolator switch yading@10: int version; ///< encoder software revision yading@10: int copy_history; ///< copy history yading@10: int source_pcm_res; ///< source pcm resolution yading@10: int front_sum; ///< front sum/difference flag yading@10: int surround_sum; ///< surround sum/difference flag yading@10: int dialog_norm; ///< dialog normalisation parameter yading@10: yading@10: /* Primary audio coding header */ yading@10: int subframes; ///< number of subframes yading@10: int total_channels; ///< number of channels including extensions yading@10: int prim_channels; ///< number of primary audio channels yading@10: int subband_activity[DCA_PRIM_CHANNELS_MAX]; ///< subband activity count yading@10: int vq_start_subband[DCA_PRIM_CHANNELS_MAX]; ///< high frequency vq start subband yading@10: int joint_intensity[DCA_PRIM_CHANNELS_MAX]; ///< joint intensity coding index yading@10: int transient_huffman[DCA_PRIM_CHANNELS_MAX]; ///< transient mode code book yading@10: int scalefactor_huffman[DCA_PRIM_CHANNELS_MAX]; ///< scale factor code book yading@10: int bitalloc_huffman[DCA_PRIM_CHANNELS_MAX]; ///< bit allocation quantizer select yading@10: int quant_index_huffman[DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]; ///< quantization index codebook select yading@10: float scalefactor_adj[DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]; ///< scale factor adjustment yading@10: yading@10: /* Primary audio coding side information */ yading@10: int subsubframes[DCA_SUBFRAMES_MAX]; ///< number of subsubframes yading@10: int partial_samples[DCA_SUBFRAMES_MAX]; ///< partial subsubframe samples count yading@10: int prediction_mode[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< prediction mode (ADPCM used or not) yading@10: int prediction_vq[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< prediction VQ coefs yading@10: int bitalloc[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< bit allocation index yading@10: int transition_mode[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< transition mode (transients) yading@10: int scale_factor[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][2]; ///< scale factors (2 if transient) yading@10: int joint_huff[DCA_PRIM_CHANNELS_MAX]; ///< joint subband scale factors codebook yading@10: int joint_scale_factor[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< joint subband scale factors yading@10: int downmix_coef[DCA_PRIM_CHANNELS_MAX][2]; ///< stereo downmix coefficients yading@10: int dynrange_coef; ///< dynamic range coefficient yading@10: yading@10: int high_freq_vq[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< VQ encoded high frequency subbands yading@10: yading@10: float lfe_data[2 * DCA_LFE_MAX * (DCA_BLOCKS_MAX + 4)]; ///< Low frequency effect data yading@10: int lfe_scale_factor; yading@10: yading@10: /* Subband samples history (for ADPCM) */ yading@10: DECLARE_ALIGNED(16, float, subband_samples_hist)[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][4]; yading@10: DECLARE_ALIGNED(32, float, subband_fir_hist)[DCA_PRIM_CHANNELS_MAX][512]; yading@10: DECLARE_ALIGNED(32, float, subband_fir_noidea)[DCA_PRIM_CHANNELS_MAX][32]; yading@10: int hist_index[DCA_PRIM_CHANNELS_MAX]; yading@10: DECLARE_ALIGNED(32, float, raXin)[32]; yading@10: yading@10: int output; ///< type of output yading@10: yading@10: DECLARE_ALIGNED(32, float, subband_samples)[DCA_BLOCKS_MAX][DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][8]; yading@10: float *samples_chanptr[DCA_PRIM_CHANNELS_MAX + 1]; yading@10: float *extra_channels[DCA_PRIM_CHANNELS_MAX + 1]; yading@10: uint8_t *extra_channels_buffer; yading@10: unsigned int extra_channels_buffer_size; yading@10: yading@10: uint8_t dca_buffer[DCA_MAX_FRAME_SIZE + DCA_MAX_EXSS_HEADER_SIZE + DCA_BUFFER_PADDING_SIZE]; yading@10: int dca_buffer_size; ///< how much data is in the dca_buffer yading@10: yading@10: const int8_t *channel_order_tab; ///< channel reordering table, lfe and non lfe yading@10: GetBitContext gb; yading@10: /* Current position in DCA frame */ yading@10: int current_subframe; yading@10: int current_subsubframe; yading@10: yading@10: int core_ext_mask; ///< present extensions in the core substream yading@10: yading@10: /* XCh extension information */ yading@10: int xch_present; ///< XCh extension present and valid yading@10: int xch_base_channel; ///< index of first (only) channel containing XCH data yading@10: yading@10: /* XXCH extension information */ yading@10: int xxch_chset; yading@10: int xxch_nbits_spk_mask; yading@10: uint32_t xxch_core_spkmask; yading@10: uint32_t xxch_spk_masks[4]; /* speaker masks, last element is core mask */ yading@10: int xxch_chset_nch[4]; yading@10: float xxch_dmix_sf[DCA_CHSETS_MAX]; yading@10: yading@10: uint32_t xxch_dmix_embedded; /* lower layer has mix pre-embedded, per chset */ yading@10: float xxch_dmix_coeff[DCA_PRIM_CHANNELS_MAX][32]; /* worst case sizing */ yading@10: yading@10: int8_t xxch_order_tab[32]; yading@10: int8_t lfe_index; yading@10: yading@10: /* ExSS header parser */ yading@10: int static_fields; ///< static fields present yading@10: int mix_metadata; ///< mixing metadata present yading@10: int num_mix_configs; ///< number of mix out configurations yading@10: int mix_config_num_ch[4]; ///< number of channels in each mix out configuration yading@10: yading@10: int profile; yading@10: yading@10: int debug_flag; ///< used for suppressing repeated error messages output yading@10: AVFloatDSPContext fdsp; yading@10: FFTContext imdct; yading@10: SynthFilterContext synth; yading@10: DCADSPContext dcadsp; yading@10: FmtConvertContext fmt_conv; yading@10: } DCAContext; yading@10: yading@10: static const uint16_t dca_vlc_offs[] = { yading@10: 0, 512, 640, 768, 1282, 1794, 2436, 3080, 3770, 4454, 5364, yading@10: 5372, 5380, 5388, 5392, 5396, 5412, 5420, 5428, 5460, 5492, 5508, yading@10: 5572, 5604, 5668, 5796, 5860, 5892, 6412, 6668, 6796, 7308, 7564, yading@10: 7820, 8076, 8620, 9132, 9388, 9910, 10166, 10680, 11196, 11726, 12240, yading@10: 12752, 13298, 13810, 14326, 14840, 15500, 16022, 16540, 17158, 17678, 18264, yading@10: 18796, 19352, 19926, 20468, 21472, 22398, 23014, 23622, yading@10: }; yading@10: yading@10: static av_cold void dca_init_vlcs(void) yading@10: { yading@10: static int vlcs_initialized = 0; yading@10: int i, j, c = 14; yading@10: static VLC_TYPE dca_table[23622][2]; yading@10: yading@10: if (vlcs_initialized) yading@10: return; yading@10: yading@10: dca_bitalloc_index.offset = 1; yading@10: dca_bitalloc_index.wrap = 2; yading@10: for (i = 0; i < 5; i++) { yading@10: dca_bitalloc_index.vlc[i].table = &dca_table[dca_vlc_offs[i]]; yading@10: dca_bitalloc_index.vlc[i].table_allocated = dca_vlc_offs[i + 1] - dca_vlc_offs[i]; yading@10: init_vlc(&dca_bitalloc_index.vlc[i], bitalloc_12_vlc_bits[i], 12, yading@10: bitalloc_12_bits[i], 1, 1, yading@10: bitalloc_12_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC); yading@10: } yading@10: dca_scalefactor.offset = -64; yading@10: dca_scalefactor.wrap = 2; yading@10: for (i = 0; i < 5; i++) { yading@10: dca_scalefactor.vlc[i].table = &dca_table[dca_vlc_offs[i + 5]]; yading@10: dca_scalefactor.vlc[i].table_allocated = dca_vlc_offs[i + 6] - dca_vlc_offs[i + 5]; yading@10: init_vlc(&dca_scalefactor.vlc[i], SCALES_VLC_BITS, 129, yading@10: scales_bits[i], 1, 1, yading@10: scales_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC); yading@10: } yading@10: dca_tmode.offset = 0; yading@10: dca_tmode.wrap = 1; yading@10: for (i = 0; i < 4; i++) { yading@10: dca_tmode.vlc[i].table = &dca_table[dca_vlc_offs[i + 10]]; yading@10: dca_tmode.vlc[i].table_allocated = dca_vlc_offs[i + 11] - dca_vlc_offs[i + 10]; yading@10: init_vlc(&dca_tmode.vlc[i], tmode_vlc_bits[i], 4, yading@10: tmode_bits[i], 1, 1, yading@10: tmode_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC); yading@10: } yading@10: yading@10: for (i = 0; i < 10; i++) yading@10: for (j = 0; j < 7; j++) { yading@10: if (!bitalloc_codes[i][j]) yading@10: break; yading@10: dca_smpl_bitalloc[i + 1].offset = bitalloc_offsets[i]; yading@10: dca_smpl_bitalloc[i + 1].wrap = 1 + (j > 4); yading@10: dca_smpl_bitalloc[i + 1].vlc[j].table = &dca_table[dca_vlc_offs[c]]; yading@10: dca_smpl_bitalloc[i + 1].vlc[j].table_allocated = dca_vlc_offs[c + 1] - dca_vlc_offs[c]; yading@10: yading@10: init_vlc(&dca_smpl_bitalloc[i + 1].vlc[j], bitalloc_maxbits[i][j], yading@10: bitalloc_sizes[i], yading@10: bitalloc_bits[i][j], 1, 1, yading@10: bitalloc_codes[i][j], 2, 2, INIT_VLC_USE_NEW_STATIC); yading@10: c++; yading@10: } yading@10: vlcs_initialized = 1; yading@10: } yading@10: yading@10: static inline void get_array(GetBitContext *gb, int *dst, int len, int bits) yading@10: { yading@10: while (len--) yading@10: *dst++ = get_bits(gb, bits); yading@10: } yading@10: yading@10: static inline int dca_xxch2index(DCAContext *s, int xxch_ch) yading@10: { yading@10: int i, base, mask; yading@10: yading@10: /* locate channel set containing the channel */ yading@10: for (i = -1, base = 0, mask = (s->xxch_core_spkmask & ~DCA_XXCH_LFE1); yading@10: i <= s->xxch_chset && !(mask & xxch_ch); mask = s->xxch_spk_masks[++i]) yading@10: base += av_popcount(mask); yading@10: yading@10: return base + av_popcount(mask & (xxch_ch - 1)); yading@10: } yading@10: yading@10: static int dca_parse_audio_coding_header(DCAContext *s, int base_channel, yading@10: int xxch) yading@10: { yading@10: int i, j; yading@10: static const float adj_table[4] = { 1.0, 1.1250, 1.2500, 1.4375 }; yading@10: static const int bitlen[11] = { 0, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3 }; yading@10: static const int thr[11] = { 0, 1, 3, 3, 3, 3, 7, 7, 7, 7, 7 }; yading@10: int hdr_pos = 0, hdr_size = 0; yading@10: float sign, mag, scale_factor; yading@10: int this_chans, acc_mask; yading@10: int embedded_downmix; yading@10: int nchans, mask[8]; yading@10: int coeff, ichan; yading@10: yading@10: /* xxch has arbitrary sized audio coding headers */ yading@10: if (xxch) { yading@10: hdr_pos = get_bits_count(&s->gb); yading@10: hdr_size = get_bits(&s->gb, 7) + 1; yading@10: } yading@10: yading@10: nchans = get_bits(&s->gb, 3) + 1; yading@10: s->total_channels = nchans + base_channel; yading@10: s->prim_channels = s->total_channels; yading@10: yading@10: /* obtain speaker layout mask & downmix coefficients for XXCH */ yading@10: if (xxch) { yading@10: acc_mask = s->xxch_core_spkmask; yading@10: yading@10: this_chans = get_bits(&s->gb, s->xxch_nbits_spk_mask - 6) << 6; yading@10: s->xxch_spk_masks[s->xxch_chset] = this_chans; yading@10: s->xxch_chset_nch[s->xxch_chset] = nchans; yading@10: yading@10: for (i = 0; i <= s->xxch_chset; i++) yading@10: acc_mask |= s->xxch_spk_masks[i]; yading@10: yading@10: /* check for downmixing information */ yading@10: if (get_bits1(&s->gb)) { yading@10: embedded_downmix = get_bits1(&s->gb); yading@10: scale_factor = yading@10: 1.0f / dca_downmix_scale_factors[(get_bits(&s->gb, 6) - 1) << 2]; yading@10: yading@10: s->xxch_dmix_sf[s->xxch_chset] = scale_factor; yading@10: yading@10: for (i = base_channel; i < s->prim_channels; i++) { yading@10: mask[i] = get_bits(&s->gb, s->xxch_nbits_spk_mask); yading@10: } yading@10: yading@10: for (j = base_channel; j < s->prim_channels; j++) { yading@10: memset(s->xxch_dmix_coeff[j], 0, sizeof(s->xxch_dmix_coeff[0])); yading@10: s->xxch_dmix_embedded |= (embedded_downmix << j); yading@10: for (i = 0; i < s->xxch_nbits_spk_mask; i++) { yading@10: if (mask[j] & (1 << i)) { yading@10: if ((1 << i) == DCA_XXCH_LFE1) { yading@10: av_log(s->avctx, AV_LOG_WARNING, yading@10: "DCA-XXCH: dmix to LFE1 not supported.\n"); yading@10: continue; yading@10: } yading@10: yading@10: coeff = get_bits(&s->gb, 7); yading@10: sign = (coeff & 64) ? 1.0 : -1.0; yading@10: mag = dca_downmix_scale_factors[((coeff & 63) - 1) << 2]; yading@10: ichan = dca_xxch2index(s, 1 << i); yading@10: s->xxch_dmix_coeff[j][ichan] = sign * mag; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: if (s->prim_channels > DCA_PRIM_CHANNELS_MAX) yading@10: s->prim_channels = DCA_PRIM_CHANNELS_MAX; yading@10: yading@10: yading@10: for (i = base_channel; i < s->prim_channels; i++) { yading@10: s->subband_activity[i] = get_bits(&s->gb, 5) + 2; yading@10: if (s->subband_activity[i] > DCA_SUBBANDS) yading@10: s->subband_activity[i] = DCA_SUBBANDS; yading@10: } yading@10: for (i = base_channel; i < s->prim_channels; i++) { yading@10: s->vq_start_subband[i] = get_bits(&s->gb, 5) + 1; yading@10: if (s->vq_start_subband[i] > DCA_SUBBANDS) yading@10: s->vq_start_subband[i] = DCA_SUBBANDS; yading@10: } yading@10: get_array(&s->gb, s->joint_intensity + base_channel, s->prim_channels - base_channel, 3); yading@10: get_array(&s->gb, s->transient_huffman + base_channel, s->prim_channels - base_channel, 2); yading@10: get_array(&s->gb, s->scalefactor_huffman + base_channel, s->prim_channels - base_channel, 3); yading@10: get_array(&s->gb, s->bitalloc_huffman + base_channel, s->prim_channels - base_channel, 3); yading@10: yading@10: /* Get codebooks quantization indexes */ yading@10: if (!base_channel) yading@10: memset(s->quant_index_huffman, 0, sizeof(s->quant_index_huffman)); yading@10: for (j = 1; j < 11; j++) yading@10: for (i = base_channel; i < s->prim_channels; i++) yading@10: s->quant_index_huffman[i][j] = get_bits(&s->gb, bitlen[j]); yading@10: yading@10: /* Get scale factor adjustment */ yading@10: for (j = 0; j < 11; j++) yading@10: for (i = base_channel; i < s->prim_channels; i++) yading@10: s->scalefactor_adj[i][j] = 1; yading@10: yading@10: for (j = 1; j < 11; j++) yading@10: for (i = base_channel; i < s->prim_channels; i++) yading@10: if (s->quant_index_huffman[i][j] < thr[j]) yading@10: s->scalefactor_adj[i][j] = adj_table[get_bits(&s->gb, 2)]; yading@10: yading@10: if (!xxch) { yading@10: if (s->crc_present) { yading@10: /* Audio header CRC check */ yading@10: get_bits(&s->gb, 16); yading@10: } yading@10: } else { yading@10: /* Skip to the end of the header, also ignore CRC if present */ yading@10: i = get_bits_count(&s->gb); yading@10: if (hdr_pos + 8 * hdr_size > i) yading@10: skip_bits_long(&s->gb, hdr_pos + 8 * hdr_size - i); yading@10: } yading@10: yading@10: s->current_subframe = 0; yading@10: s->current_subsubframe = 0; yading@10: yading@10: #ifdef TRACE yading@10: av_log(s->avctx, AV_LOG_DEBUG, "subframes: %i\n", s->subframes); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "prim channels: %i\n", s->prim_channels); yading@10: for (i = base_channel; i < s->prim_channels; i++) { yading@10: av_log(s->avctx, AV_LOG_DEBUG, "subband activity: %i\n", yading@10: s->subband_activity[i]); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "vq start subband: %i\n", yading@10: s->vq_start_subband[i]); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "joint intensity: %i\n", yading@10: s->joint_intensity[i]); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "transient mode codebook: %i\n", yading@10: s->transient_huffman[i]); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "scale factor codebook: %i\n", yading@10: s->scalefactor_huffman[i]); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "bit allocation quantizer: %i\n", yading@10: s->bitalloc_huffman[i]); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "quant index huff:"); yading@10: for (j = 0; j < 11; j++) yading@10: av_log(s->avctx, AV_LOG_DEBUG, " %i", s->quant_index_huffman[i][j]); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "\n"); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "scalefac adj:"); yading@10: for (j = 0; j < 11; j++) yading@10: av_log(s->avctx, AV_LOG_DEBUG, " %1.3f", s->scalefactor_adj[i][j]); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "\n"); yading@10: } yading@10: #endif yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static int dca_parse_frame_header(DCAContext *s) yading@10: { yading@10: init_get_bits(&s->gb, s->dca_buffer, s->dca_buffer_size * 8); yading@10: yading@10: /* Sync code */ yading@10: skip_bits_long(&s->gb, 32); yading@10: yading@10: /* Frame header */ yading@10: s->frame_type = get_bits(&s->gb, 1); yading@10: s->samples_deficit = get_bits(&s->gb, 5) + 1; yading@10: s->crc_present = get_bits(&s->gb, 1); yading@10: s->sample_blocks = get_bits(&s->gb, 7) + 1; yading@10: s->frame_size = get_bits(&s->gb, 14) + 1; yading@10: if (s->frame_size < 95) yading@10: return AVERROR_INVALIDDATA; yading@10: s->amode = get_bits(&s->gb, 6); yading@10: s->sample_rate = avpriv_dca_sample_rates[get_bits(&s->gb, 4)]; yading@10: if (!s->sample_rate) yading@10: return AVERROR_INVALIDDATA; yading@10: s->bit_rate_index = get_bits(&s->gb, 5); yading@10: s->bit_rate = dca_bit_rates[s->bit_rate_index]; yading@10: if (!s->bit_rate) yading@10: return AVERROR_INVALIDDATA; yading@10: yading@10: s->downmix = get_bits(&s->gb, 1); /* note: this is FixedBit == 0 */ yading@10: s->dynrange = get_bits(&s->gb, 1); yading@10: s->timestamp = get_bits(&s->gb, 1); yading@10: s->aux_data = get_bits(&s->gb, 1); yading@10: s->hdcd = get_bits(&s->gb, 1); yading@10: s->ext_descr = get_bits(&s->gb, 3); yading@10: s->ext_coding = get_bits(&s->gb, 1); yading@10: s->aspf = get_bits(&s->gb, 1); yading@10: s->lfe = get_bits(&s->gb, 2); yading@10: s->predictor_history = get_bits(&s->gb, 1); yading@10: yading@10: if (s->lfe == 3) { yading@10: s->lfe = 0; yading@10: avpriv_request_sample(s->avctx, "LFE = 3"); yading@10: return AVERROR_PATCHWELCOME; yading@10: } yading@10: yading@10: /* TODO: check CRC */ yading@10: if (s->crc_present) yading@10: s->header_crc = get_bits(&s->gb, 16); yading@10: yading@10: s->multirate_inter = get_bits(&s->gb, 1); yading@10: s->version = get_bits(&s->gb, 4); yading@10: s->copy_history = get_bits(&s->gb, 2); yading@10: s->source_pcm_res = get_bits(&s->gb, 3); yading@10: s->front_sum = get_bits(&s->gb, 1); yading@10: s->surround_sum = get_bits(&s->gb, 1); yading@10: s->dialog_norm = get_bits(&s->gb, 4); yading@10: yading@10: /* FIXME: channels mixing levels */ yading@10: s->output = s->amode; yading@10: if (s->lfe) yading@10: s->output |= DCA_LFE; yading@10: yading@10: #ifdef TRACE yading@10: av_log(s->avctx, AV_LOG_DEBUG, "frame type: %i\n", s->frame_type); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "samples deficit: %i\n", s->samples_deficit); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "crc present: %i\n", s->crc_present); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "sample blocks: %i (%i samples)\n", yading@10: s->sample_blocks, s->sample_blocks * 32); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "frame size: %i bytes\n", s->frame_size); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "amode: %i (%i channels)\n", yading@10: s->amode, dca_channels[s->amode]); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "sample rate: %i Hz\n", yading@10: s->sample_rate); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "bit rate: %i bits/s\n", yading@10: s->bit_rate); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "downmix: %i\n", s->downmix); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "dynrange: %i\n", s->dynrange); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "timestamp: %i\n", s->timestamp); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "aux_data: %i\n", s->aux_data); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "hdcd: %i\n", s->hdcd); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "ext descr: %i\n", s->ext_descr); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "ext coding: %i\n", s->ext_coding); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "aspf: %i\n", s->aspf); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "lfe: %i\n", s->lfe); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "predictor history: %i\n", yading@10: s->predictor_history); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "header crc: %i\n", s->header_crc); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "multirate inter: %i\n", yading@10: s->multirate_inter); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "version number: %i\n", s->version); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "copy history: %i\n", s->copy_history); yading@10: av_log(s->avctx, AV_LOG_DEBUG, yading@10: "source pcm resolution: %i (%i bits/sample)\n", yading@10: s->source_pcm_res, dca_bits_per_sample[s->source_pcm_res]); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "front sum: %i\n", s->front_sum); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "surround sum: %i\n", s->surround_sum); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "dialog norm: %i\n", s->dialog_norm); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "\n"); yading@10: #endif yading@10: yading@10: /* Primary audio coding header */ yading@10: s->subframes = get_bits(&s->gb, 4) + 1; yading@10: yading@10: return dca_parse_audio_coding_header(s, 0, 0); yading@10: } yading@10: yading@10: yading@10: static inline int get_scale(GetBitContext *gb, int level, int value, int log2range) yading@10: { yading@10: if (level < 5) { yading@10: /* huffman encoded */ yading@10: value += get_bitalloc(gb, &dca_scalefactor, level); yading@10: value = av_clip(value, 0, (1 << log2range) - 1); yading@10: } else if (level < 8) { yading@10: if (level + 1 > log2range) { yading@10: skip_bits(gb, level + 1 - log2range); yading@10: value = get_bits(gb, log2range); yading@10: } else { yading@10: value = get_bits(gb, level + 1); yading@10: } yading@10: } yading@10: return value; yading@10: } yading@10: yading@10: static int dca_subframe_header(DCAContext *s, int base_channel, int block_index) yading@10: { yading@10: /* Primary audio coding side information */ yading@10: int j, k; yading@10: yading@10: if (get_bits_left(&s->gb) < 0) yading@10: return AVERROR_INVALIDDATA; yading@10: yading@10: if (!base_channel) { yading@10: s->subsubframes[s->current_subframe] = get_bits(&s->gb, 2) + 1; yading@10: s->partial_samples[s->current_subframe] = get_bits(&s->gb, 3); yading@10: } yading@10: yading@10: for (j = base_channel; j < s->prim_channels; j++) { yading@10: for (k = 0; k < s->subband_activity[j]; k++) yading@10: s->prediction_mode[j][k] = get_bits(&s->gb, 1); yading@10: } yading@10: yading@10: /* Get prediction codebook */ yading@10: for (j = base_channel; j < s->prim_channels; j++) { yading@10: for (k = 0; k < s->subband_activity[j]; k++) { yading@10: if (s->prediction_mode[j][k] > 0) { yading@10: /* (Prediction coefficient VQ address) */ yading@10: s->prediction_vq[j][k] = get_bits(&s->gb, 12); yading@10: } yading@10: } yading@10: } yading@10: yading@10: /* Bit allocation index */ yading@10: for (j = base_channel; j < s->prim_channels; j++) { yading@10: for (k = 0; k < s->vq_start_subband[j]; k++) { yading@10: if (s->bitalloc_huffman[j] == 6) yading@10: s->bitalloc[j][k] = get_bits(&s->gb, 5); yading@10: else if (s->bitalloc_huffman[j] == 5) yading@10: s->bitalloc[j][k] = get_bits(&s->gb, 4); yading@10: else if (s->bitalloc_huffman[j] == 7) { yading@10: av_log(s->avctx, AV_LOG_ERROR, yading@10: "Invalid bit allocation index\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } else { yading@10: s->bitalloc[j][k] = yading@10: get_bitalloc(&s->gb, &dca_bitalloc_index, s->bitalloc_huffman[j]); yading@10: } yading@10: yading@10: if (s->bitalloc[j][k] > 26) { yading@10: av_dlog(s->avctx, "bitalloc index [%i][%i] too big (%i)\n", yading@10: j, k, s->bitalloc[j][k]); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: } yading@10: } yading@10: yading@10: /* Transition mode */ yading@10: for (j = base_channel; j < s->prim_channels; j++) { yading@10: for (k = 0; k < s->subband_activity[j]; k++) { yading@10: s->transition_mode[j][k] = 0; yading@10: if (s->subsubframes[s->current_subframe] > 1 && yading@10: k < s->vq_start_subband[j] && s->bitalloc[j][k] > 0) { yading@10: s->transition_mode[j][k] = yading@10: get_bitalloc(&s->gb, &dca_tmode, s->transient_huffman[j]); yading@10: } yading@10: } yading@10: } yading@10: yading@10: if (get_bits_left(&s->gb) < 0) yading@10: return AVERROR_INVALIDDATA; yading@10: yading@10: for (j = base_channel; j < s->prim_channels; j++) { yading@10: const uint32_t *scale_table; yading@10: int scale_sum, log_size; yading@10: yading@10: memset(s->scale_factor[j], 0, yading@10: s->subband_activity[j] * sizeof(s->scale_factor[0][0][0]) * 2); yading@10: yading@10: if (s->scalefactor_huffman[j] == 6) { yading@10: scale_table = scale_factor_quant7; yading@10: log_size = 7; yading@10: } else { yading@10: scale_table = scale_factor_quant6; yading@10: log_size = 6; yading@10: } yading@10: yading@10: /* When huffman coded, only the difference is encoded */ yading@10: scale_sum = 0; yading@10: yading@10: for (k = 0; k < s->subband_activity[j]; k++) { yading@10: if (k >= s->vq_start_subband[j] || s->bitalloc[j][k] > 0) { yading@10: scale_sum = get_scale(&s->gb, s->scalefactor_huffman[j], scale_sum, log_size); yading@10: s->scale_factor[j][k][0] = scale_table[scale_sum]; yading@10: } yading@10: yading@10: if (k < s->vq_start_subband[j] && s->transition_mode[j][k]) { yading@10: /* Get second scale factor */ yading@10: scale_sum = get_scale(&s->gb, s->scalefactor_huffman[j], scale_sum, log_size); yading@10: s->scale_factor[j][k][1] = scale_table[scale_sum]; yading@10: } yading@10: } yading@10: } yading@10: yading@10: /* Joint subband scale factor codebook select */ yading@10: for (j = base_channel; j < s->prim_channels; j++) { yading@10: /* Transmitted only if joint subband coding enabled */ yading@10: if (s->joint_intensity[j] > 0) yading@10: s->joint_huff[j] = get_bits(&s->gb, 3); yading@10: } yading@10: yading@10: if (get_bits_left(&s->gb) < 0) yading@10: return AVERROR_INVALIDDATA; yading@10: yading@10: /* Scale factors for joint subband coding */ yading@10: for (j = base_channel; j < s->prim_channels; j++) { yading@10: int source_channel; yading@10: yading@10: /* Transmitted only if joint subband coding enabled */ yading@10: if (s->joint_intensity[j] > 0) { yading@10: int scale = 0; yading@10: source_channel = s->joint_intensity[j] - 1; yading@10: yading@10: /* When huffman coded, only the difference is encoded yading@10: * (is this valid as well for joint scales ???) */ yading@10: yading@10: for (k = s->subband_activity[j]; k < s->subband_activity[source_channel]; k++) { yading@10: scale = get_scale(&s->gb, s->joint_huff[j], 64 /* bias */, 7); yading@10: s->joint_scale_factor[j][k] = scale; /*joint_scale_table[scale]; */ yading@10: } yading@10: yading@10: if (!(s->debug_flag & 0x02)) { yading@10: av_log(s->avctx, AV_LOG_DEBUG, yading@10: "Joint stereo coding not supported\n"); yading@10: s->debug_flag |= 0x02; yading@10: } yading@10: } yading@10: } yading@10: yading@10: /* Stereo downmix coefficients */ yading@10: if (!base_channel && s->prim_channels > 2) { yading@10: if (s->downmix) { yading@10: for (j = base_channel; j < s->prim_channels; j++) { yading@10: s->downmix_coef[j][0] = get_bits(&s->gb, 7); yading@10: s->downmix_coef[j][1] = get_bits(&s->gb, 7); yading@10: } yading@10: } else { yading@10: int am = s->amode & DCA_CHANNEL_MASK; yading@10: if (am >= FF_ARRAY_ELEMS(dca_default_coeffs)) { yading@10: av_log(s->avctx, AV_LOG_ERROR, yading@10: "Invalid channel mode %d\n", am); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: for (j = base_channel; j < FFMIN(s->prim_channels, FF_ARRAY_ELEMS(dca_default_coeffs[am])); j++) { yading@10: s->downmix_coef[j][0] = dca_default_coeffs[am][j][0]; yading@10: s->downmix_coef[j][1] = dca_default_coeffs[am][j][1]; yading@10: } yading@10: } yading@10: } yading@10: yading@10: /* Dynamic range coefficient */ yading@10: if (!base_channel && s->dynrange) yading@10: s->dynrange_coef = get_bits(&s->gb, 8); yading@10: yading@10: /* Side information CRC check word */ yading@10: if (s->crc_present) { yading@10: get_bits(&s->gb, 16); yading@10: } yading@10: yading@10: /* yading@10: * Primary audio data arrays yading@10: */ yading@10: yading@10: /* VQ encoded high frequency subbands */ yading@10: for (j = base_channel; j < s->prim_channels; j++) yading@10: for (k = s->vq_start_subband[j]; k < s->subband_activity[j]; k++) yading@10: /* 1 vector -> 32 samples */ yading@10: s->high_freq_vq[j][k] = get_bits(&s->gb, 10); yading@10: yading@10: /* Low frequency effect data */ yading@10: if (!base_channel && s->lfe) { yading@10: int quant7; yading@10: /* LFE samples */ yading@10: int lfe_samples = 2 * s->lfe * (4 + block_index); yading@10: int lfe_end_sample = 2 * s->lfe * (4 + block_index + s->subsubframes[s->current_subframe]); yading@10: float lfe_scale; yading@10: yading@10: for (j = lfe_samples; j < lfe_end_sample; j++) { yading@10: /* Signed 8 bits int */ yading@10: s->lfe_data[j] = get_sbits(&s->gb, 8); yading@10: } yading@10: yading@10: /* Scale factor index */ yading@10: quant7 = get_bits(&s->gb, 8); yading@10: if (quant7 > 127) { yading@10: avpriv_request_sample(s->avctx, "LFEScaleIndex larger than 127"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: s->lfe_scale_factor = scale_factor_quant7[quant7]; yading@10: yading@10: /* Quantization step size * scale factor */ yading@10: lfe_scale = 0.035 * s->lfe_scale_factor; yading@10: yading@10: for (j = lfe_samples; j < lfe_end_sample; j++) yading@10: s->lfe_data[j] *= lfe_scale; yading@10: } yading@10: yading@10: #ifdef TRACE yading@10: av_log(s->avctx, AV_LOG_DEBUG, "subsubframes: %i\n", yading@10: s->subsubframes[s->current_subframe]); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "partial samples: %i\n", yading@10: s->partial_samples[s->current_subframe]); yading@10: yading@10: for (j = base_channel; j < s->prim_channels; j++) { yading@10: av_log(s->avctx, AV_LOG_DEBUG, "prediction mode:"); yading@10: for (k = 0; k < s->subband_activity[j]; k++) yading@10: av_log(s->avctx, AV_LOG_DEBUG, " %i", s->prediction_mode[j][k]); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "\n"); yading@10: } yading@10: for (j = base_channel; j < s->prim_channels; j++) { yading@10: for (k = 0; k < s->subband_activity[j]; k++) yading@10: av_log(s->avctx, AV_LOG_DEBUG, yading@10: "prediction coefs: %f, %f, %f, %f\n", yading@10: (float) adpcm_vb[s->prediction_vq[j][k]][0] / 8192, yading@10: (float) adpcm_vb[s->prediction_vq[j][k]][1] / 8192, yading@10: (float) adpcm_vb[s->prediction_vq[j][k]][2] / 8192, yading@10: (float) adpcm_vb[s->prediction_vq[j][k]][3] / 8192); yading@10: } yading@10: for (j = base_channel; j < s->prim_channels; j++) { yading@10: av_log(s->avctx, AV_LOG_DEBUG, "bitalloc index: "); yading@10: for (k = 0; k < s->vq_start_subband[j]; k++) yading@10: av_log(s->avctx, AV_LOG_DEBUG, "%2.2i ", s->bitalloc[j][k]); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "\n"); yading@10: } yading@10: for (j = base_channel; j < s->prim_channels; j++) { yading@10: av_log(s->avctx, AV_LOG_DEBUG, "Transition mode:"); yading@10: for (k = 0; k < s->subband_activity[j]; k++) yading@10: av_log(s->avctx, AV_LOG_DEBUG, " %i", s->transition_mode[j][k]); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "\n"); yading@10: } yading@10: for (j = base_channel; j < s->prim_channels; j++) { yading@10: av_log(s->avctx, AV_LOG_DEBUG, "Scale factor:"); yading@10: for (k = 0; k < s->subband_activity[j]; k++) { yading@10: if (k >= s->vq_start_subband[j] || s->bitalloc[j][k] > 0) yading@10: av_log(s->avctx, AV_LOG_DEBUG, " %i", s->scale_factor[j][k][0]); yading@10: if (k < s->vq_start_subband[j] && s->transition_mode[j][k]) yading@10: av_log(s->avctx, AV_LOG_DEBUG, " %i(t)", s->scale_factor[j][k][1]); yading@10: } yading@10: av_log(s->avctx, AV_LOG_DEBUG, "\n"); yading@10: } yading@10: for (j = base_channel; j < s->prim_channels; j++) { yading@10: if (s->joint_intensity[j] > 0) { yading@10: int source_channel = s->joint_intensity[j] - 1; yading@10: av_log(s->avctx, AV_LOG_DEBUG, "Joint scale factor index:\n"); yading@10: for (k = s->subband_activity[j]; k < s->subband_activity[source_channel]; k++) yading@10: av_log(s->avctx, AV_LOG_DEBUG, " %i", s->joint_scale_factor[j][k]); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "\n"); yading@10: } yading@10: } yading@10: if (!base_channel && s->prim_channels > 2 && s->downmix) { yading@10: av_log(s->avctx, AV_LOG_DEBUG, "Downmix coeffs:\n"); yading@10: for (j = 0; j < s->prim_channels; j++) { yading@10: av_log(s->avctx, AV_LOG_DEBUG, "Channel 0, %d = %f\n", j, yading@10: dca_downmix_coeffs[s->downmix_coef[j][0]]); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "Channel 1, %d = %f\n", j, yading@10: dca_downmix_coeffs[s->downmix_coef[j][1]]); yading@10: } yading@10: av_log(s->avctx, AV_LOG_DEBUG, "\n"); yading@10: } yading@10: for (j = base_channel; j < s->prim_channels; j++) yading@10: for (k = s->vq_start_subband[j]; k < s->subband_activity[j]; k++) yading@10: av_log(s->avctx, AV_LOG_DEBUG, "VQ index: %i\n", s->high_freq_vq[j][k]); yading@10: if (!base_channel && s->lfe) { yading@10: int lfe_samples = 2 * s->lfe * (4 + block_index); yading@10: int lfe_end_sample = 2 * s->lfe * (4 + block_index + s->subsubframes[s->current_subframe]); yading@10: yading@10: av_log(s->avctx, AV_LOG_DEBUG, "LFE samples:\n"); yading@10: for (j = lfe_samples; j < lfe_end_sample; j++) yading@10: av_log(s->avctx, AV_LOG_DEBUG, " %f", s->lfe_data[j]); yading@10: av_log(s->avctx, AV_LOG_DEBUG, "\n"); yading@10: } yading@10: #endif yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static void qmf_32_subbands(DCAContext *s, int chans, yading@10: float samples_in[32][8], float *samples_out, yading@10: float scale) yading@10: { yading@10: const float *prCoeff; yading@10: int i; yading@10: yading@10: int sb_act = s->subband_activity[chans]; yading@10: int subindex; yading@10: yading@10: scale *= sqrt(1 / 8.0); yading@10: yading@10: /* Select filter */ yading@10: if (!s->multirate_inter) /* Non-perfect reconstruction */ yading@10: prCoeff = fir_32bands_nonperfect; yading@10: else /* Perfect reconstruction */ yading@10: prCoeff = fir_32bands_perfect; yading@10: yading@10: for (i = sb_act; i < 32; i++) yading@10: s->raXin[i] = 0.0; yading@10: yading@10: /* Reconstructed channel sample index */ yading@10: for (subindex = 0; subindex < 8; subindex++) { yading@10: /* Load in one sample from each subband and clear inactive subbands */ yading@10: for (i = 0; i < sb_act; i++) { yading@10: unsigned sign = (i - 1) & 2; yading@10: uint32_t v = AV_RN32A(&samples_in[i][subindex]) ^ sign << 30; yading@10: AV_WN32A(&s->raXin[i], v); yading@10: } yading@10: yading@10: s->synth.synth_filter_float(&s->imdct, yading@10: s->subband_fir_hist[chans], yading@10: &s->hist_index[chans], yading@10: s->subband_fir_noidea[chans], prCoeff, yading@10: samples_out, s->raXin, scale); yading@10: samples_out += 32; yading@10: } yading@10: } yading@10: yading@10: static void lfe_interpolation_fir(DCAContext *s, int decimation_select, yading@10: int num_deci_sample, float *samples_in, yading@10: float *samples_out, float scale) yading@10: { yading@10: /* samples_in: An array holding decimated samples. yading@10: * Samples in current subframe starts from samples_in[0], yading@10: * while samples_in[-1], samples_in[-2], ..., stores samples yading@10: * from last subframe as history. yading@10: * yading@10: * samples_out: An array holding interpolated samples yading@10: */ yading@10: yading@10: int decifactor; yading@10: const float *prCoeff; yading@10: int deciindex; yading@10: yading@10: /* Select decimation filter */ yading@10: if (decimation_select == 1) { yading@10: decifactor = 64; yading@10: prCoeff = lfe_fir_128; yading@10: } else { yading@10: decifactor = 32; yading@10: prCoeff = lfe_fir_64; yading@10: } yading@10: /* Interpolation */ yading@10: for (deciindex = 0; deciindex < num_deci_sample; deciindex++) { yading@10: s->dcadsp.lfe_fir(samples_out, samples_in, prCoeff, decifactor, scale); yading@10: samples_in++; yading@10: samples_out += 2 * decifactor; yading@10: } yading@10: } yading@10: yading@10: /* downmixing routines */ yading@10: #define MIX_REAR1(samples, s1, rs, coef) \ yading@10: samples[0][i] += samples[s1][i] * coef[rs][0]; \ yading@10: samples[1][i] += samples[s1][i] * coef[rs][1]; yading@10: yading@10: #define MIX_REAR2(samples, s1, s2, rs, coef) \ yading@10: samples[0][i] += samples[s1][i] * coef[rs][0] + samples[s2][i] * coef[rs + 1][0]; \ yading@10: samples[1][i] += samples[s1][i] * coef[rs][1] + samples[s2][i] * coef[rs + 1][1]; yading@10: yading@10: #define MIX_FRONT3(samples, coef) \ yading@10: t = samples[c][i]; \ yading@10: u = samples[l][i]; \ yading@10: v = samples[r][i]; \ yading@10: samples[0][i] = t * coef[0][0] + u * coef[1][0] + v * coef[2][0]; \ yading@10: samples[1][i] = t * coef[0][1] + u * coef[1][1] + v * coef[2][1]; yading@10: yading@10: #define DOWNMIX_TO_STEREO(op1, op2) \ yading@10: for (i = 0; i < 256; i++) { \ yading@10: op1 \ yading@10: op2 \ yading@10: } yading@10: yading@10: static void dca_downmix(float **samples, int srcfmt, yading@10: int downmix_coef[DCA_PRIM_CHANNELS_MAX][2], yading@10: const int8_t *channel_mapping) yading@10: { yading@10: int c, l, r, sl, sr, s; yading@10: int i; yading@10: float t, u, v; yading@10: float coef[DCA_PRIM_CHANNELS_MAX][2]; yading@10: yading@10: for (i = 0; i < DCA_PRIM_CHANNELS_MAX; i++) { yading@10: coef[i][0] = dca_downmix_coeffs[downmix_coef[i][0]]; yading@10: coef[i][1] = dca_downmix_coeffs[downmix_coef[i][1]]; yading@10: } yading@10: yading@10: switch (srcfmt) { yading@10: case DCA_MONO: yading@10: case DCA_CHANNEL: yading@10: case DCA_STEREO_TOTAL: yading@10: case DCA_STEREO_SUMDIFF: yading@10: case DCA_4F2R: yading@10: av_log(NULL, AV_LOG_ERROR, "Not implemented!\n"); yading@10: break; yading@10: case DCA_STEREO: yading@10: break; yading@10: case DCA_3F: yading@10: c = channel_mapping[0]; yading@10: l = channel_mapping[1]; yading@10: r = channel_mapping[2]; yading@10: DOWNMIX_TO_STEREO(MIX_FRONT3(samples, coef), ); yading@10: break; yading@10: case DCA_2F1R: yading@10: s = channel_mapping[2]; yading@10: DOWNMIX_TO_STEREO(MIX_REAR1(samples, s, 2, coef), ); yading@10: break; yading@10: case DCA_3F1R: yading@10: c = channel_mapping[0]; yading@10: l = channel_mapping[1]; yading@10: r = channel_mapping[2]; yading@10: s = channel_mapping[3]; yading@10: DOWNMIX_TO_STEREO(MIX_FRONT3(samples, coef), yading@10: MIX_REAR1(samples, s, 3, coef)); yading@10: break; yading@10: case DCA_2F2R: yading@10: sl = channel_mapping[2]; yading@10: sr = channel_mapping[3]; yading@10: DOWNMIX_TO_STEREO(MIX_REAR2(samples, sl, sr, 2, coef), ); yading@10: break; yading@10: case DCA_3F2R: yading@10: c = channel_mapping[0]; yading@10: l = channel_mapping[1]; yading@10: r = channel_mapping[2]; yading@10: sl = channel_mapping[3]; yading@10: sr = channel_mapping[4]; yading@10: DOWNMIX_TO_STEREO(MIX_FRONT3(samples, coef), yading@10: MIX_REAR2(samples, sl, sr, 3, coef)); yading@10: break; yading@10: } yading@10: } yading@10: yading@10: yading@10: #ifndef decode_blockcodes yading@10: /* Very compact version of the block code decoder that does not use table yading@10: * look-up but is slightly slower */ yading@10: static int decode_blockcode(int code, int levels, int *values) yading@10: { yading@10: int i; yading@10: int offset = (levels - 1) >> 1; yading@10: yading@10: for (i = 0; i < 4; i++) { yading@10: int div = FASTDIV(code, levels); yading@10: values[i] = code - offset - div * levels; yading@10: code = div; yading@10: } yading@10: yading@10: return code; yading@10: } yading@10: yading@10: static int decode_blockcodes(int code1, int code2, int levels, int *values) yading@10: { yading@10: return decode_blockcode(code1, levels, values) | yading@10: decode_blockcode(code2, levels, values + 4); yading@10: } yading@10: #endif yading@10: yading@10: static const uint8_t abits_sizes[7] = { 7, 10, 12, 13, 15, 17, 19 }; yading@10: static const uint8_t abits_levels[7] = { 3, 5, 7, 9, 13, 17, 25 }; yading@10: yading@10: #ifndef int8x8_fmul_int32 yading@10: static inline void int8x8_fmul_int32(float *dst, const int8_t *src, int scale) yading@10: { yading@10: float fscale = scale / 16.0; yading@10: int i; yading@10: for (i = 0; i < 8; i++) yading@10: dst[i] = src[i] * fscale; yading@10: } yading@10: #endif yading@10: yading@10: static int dca_subsubframe(DCAContext *s, int base_channel, int block_index) yading@10: { yading@10: int k, l; yading@10: int subsubframe = s->current_subsubframe; yading@10: yading@10: const float *quant_step_table; yading@10: yading@10: /* FIXME */ yading@10: float (*subband_samples)[DCA_SUBBANDS][8] = s->subband_samples[block_index]; yading@10: LOCAL_ALIGNED_16(int, block, [8]); yading@10: yading@10: /* yading@10: * Audio data yading@10: */ yading@10: yading@10: /* Select quantization step size table */ yading@10: if (s->bit_rate_index == 0x1f) yading@10: quant_step_table = lossless_quant_d; yading@10: else yading@10: quant_step_table = lossy_quant_d; yading@10: yading@10: for (k = base_channel; k < s->prim_channels; k++) { yading@10: if (get_bits_left(&s->gb) < 0) yading@10: return AVERROR_INVALIDDATA; yading@10: yading@10: for (l = 0; l < s->vq_start_subband[k]; l++) { yading@10: int m; yading@10: yading@10: /* Select the mid-tread linear quantizer */ yading@10: int abits = s->bitalloc[k][l]; yading@10: yading@10: float quant_step_size = quant_step_table[abits]; yading@10: yading@10: /* yading@10: * Determine quantization index code book and its type yading@10: */ yading@10: yading@10: /* Select quantization index code book */ yading@10: int sel = s->quant_index_huffman[k][abits]; yading@10: yading@10: /* yading@10: * Extract bits from the bit stream yading@10: */ yading@10: if (!abits) { yading@10: memset(subband_samples[k][l], 0, 8 * sizeof(subband_samples[0][0][0])); yading@10: } else { yading@10: /* Deal with transients */ yading@10: int sfi = s->transition_mode[k][l] && subsubframe >= s->transition_mode[k][l]; yading@10: float rscale = quant_step_size * s->scale_factor[k][l][sfi] * yading@10: s->scalefactor_adj[k][sel]; yading@10: yading@10: if (abits >= 11 || !dca_smpl_bitalloc[abits].vlc[sel].table) { yading@10: if (abits <= 7) { yading@10: /* Block code */ yading@10: int block_code1, block_code2, size, levels, err; yading@10: yading@10: size = abits_sizes[abits - 1]; yading@10: levels = abits_levels[abits - 1]; yading@10: yading@10: block_code1 = get_bits(&s->gb, size); yading@10: block_code2 = get_bits(&s->gb, size); yading@10: err = decode_blockcodes(block_code1, block_code2, yading@10: levels, block); yading@10: if (err) { yading@10: av_log(s->avctx, AV_LOG_ERROR, yading@10: "ERROR: block code look-up failed\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: } else { yading@10: /* no coding */ yading@10: for (m = 0; m < 8; m++) yading@10: block[m] = get_sbits(&s->gb, abits - 3); yading@10: } yading@10: } else { yading@10: /* Huffman coded */ yading@10: for (m = 0; m < 8; m++) yading@10: block[m] = get_bitalloc(&s->gb, yading@10: &dca_smpl_bitalloc[abits], sel); yading@10: } yading@10: yading@10: s->fmt_conv.int32_to_float_fmul_scalar(subband_samples[k][l], yading@10: block, rscale, 8); yading@10: } yading@10: yading@10: /* yading@10: * Inverse ADPCM if in prediction mode yading@10: */ yading@10: if (s->prediction_mode[k][l]) { yading@10: int n; yading@10: for (m = 0; m < 8; m++) { yading@10: for (n = 1; n <= 4; n++) yading@10: if (m >= n) yading@10: subband_samples[k][l][m] += yading@10: (adpcm_vb[s->prediction_vq[k][l]][n - 1] * yading@10: subband_samples[k][l][m - n] / 8192); yading@10: else if (s->predictor_history) yading@10: subband_samples[k][l][m] += yading@10: (adpcm_vb[s->prediction_vq[k][l]][n - 1] * yading@10: s->subband_samples_hist[k][l][m - n + 4] / 8192); yading@10: } yading@10: } yading@10: } yading@10: yading@10: /* yading@10: * Decode VQ encoded high frequencies yading@10: */ yading@10: for (l = s->vq_start_subband[k]; l < s->subband_activity[k]; l++) { yading@10: /* 1 vector -> 32 samples but we only need the 8 samples yading@10: * for this subsubframe. */ yading@10: int hfvq = s->high_freq_vq[k][l]; yading@10: yading@10: if (!s->debug_flag & 0x01) { yading@10: av_log(s->avctx, AV_LOG_DEBUG, yading@10: "Stream with high frequencies VQ coding\n"); yading@10: s->debug_flag |= 0x01; yading@10: } yading@10: yading@10: int8x8_fmul_int32(subband_samples[k][l], yading@10: &high_freq_vq[hfvq][subsubframe * 8], yading@10: s->scale_factor[k][l][0]); yading@10: } yading@10: } yading@10: yading@10: /* Check for DSYNC after subsubframe */ yading@10: if (s->aspf || subsubframe == s->subsubframes[s->current_subframe] - 1) { yading@10: if (0xFFFF == get_bits(&s->gb, 16)) { /* 0xFFFF */ yading@10: #ifdef TRACE yading@10: av_log(s->avctx, AV_LOG_DEBUG, "Got subframe DSYNC\n"); yading@10: #endif yading@10: } else { yading@10: av_log(s->avctx, AV_LOG_ERROR, "Didn't get subframe DSYNC\n"); yading@10: } yading@10: } yading@10: yading@10: /* Backup predictor history for adpcm */ yading@10: for (k = base_channel; k < s->prim_channels; k++) yading@10: for (l = 0; l < s->vq_start_subband[k]; l++) yading@10: memcpy(s->subband_samples_hist[k][l], yading@10: &subband_samples[k][l][4], yading@10: 4 * sizeof(subband_samples[0][0][0])); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static int dca_filter_channels(DCAContext *s, int block_index) yading@10: { yading@10: float (*subband_samples)[DCA_SUBBANDS][8] = s->subband_samples[block_index]; yading@10: int k; yading@10: yading@10: /* 32 subbands QMF */ yading@10: for (k = 0; k < s->prim_channels; k++) { yading@10: /* static float pcm_to_double[8] = { 32768.0, 32768.0, 524288.0, 524288.0, yading@10: 0, 8388608.0, 8388608.0 };*/ yading@10: if (s->channel_order_tab[k] >= 0) yading@10: qmf_32_subbands(s, k, subband_samples[k], yading@10: s->samples_chanptr[s->channel_order_tab[k]], yading@10: M_SQRT1_2 / 32768.0 /* pcm_to_double[s->source_pcm_res] */); yading@10: } yading@10: yading@10: /* Down mixing */ yading@10: if (s->avctx->request_channels == 2 && s->prim_channels > 2) { yading@10: dca_downmix(s->samples_chanptr, s->amode, s->downmix_coef, s->channel_order_tab); yading@10: } yading@10: yading@10: /* Generate LFE samples for this subsubframe FIXME!!! */ yading@10: if (s->output & DCA_LFE) { yading@10: lfe_interpolation_fir(s, s->lfe, 2 * s->lfe, yading@10: s->lfe_data + 2 * s->lfe * (block_index + 4), yading@10: s->samples_chanptr[s->lfe_index], yading@10: 1.0 / (256.0 * 32768.0)); yading@10: /* Outputs 20bits pcm samples */ yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: yading@10: static int dca_subframe_footer(DCAContext *s, int base_channel) yading@10: { yading@10: int aux_data_count = 0, i; yading@10: yading@10: /* yading@10: * Unpack optional information yading@10: */ yading@10: yading@10: /* presumably optional information only appears in the core? */ yading@10: if (!base_channel) { yading@10: if (s->timestamp) yading@10: skip_bits_long(&s->gb, 32); yading@10: yading@10: if (s->aux_data) yading@10: aux_data_count = get_bits(&s->gb, 6); yading@10: yading@10: for (i = 0; i < aux_data_count; i++) yading@10: get_bits(&s->gb, 8); yading@10: yading@10: if (s->crc_present && (s->downmix || s->dynrange)) yading@10: get_bits(&s->gb, 16); yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: /** yading@10: * Decode a dca frame block yading@10: * yading@10: * @param s pointer to the DCAContext yading@10: */ yading@10: yading@10: static int dca_decode_block(DCAContext *s, int base_channel, int block_index) yading@10: { yading@10: int ret; yading@10: yading@10: /* Sanity check */ yading@10: if (s->current_subframe >= s->subframes) { yading@10: av_log(s->avctx, AV_LOG_DEBUG, "check failed: %i>%i", yading@10: s->current_subframe, s->subframes); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: if (!s->current_subsubframe) { yading@10: #ifdef TRACE yading@10: av_log(s->avctx, AV_LOG_DEBUG, "DSYNC dca_subframe_header\n"); yading@10: #endif yading@10: /* Read subframe header */ yading@10: if ((ret = dca_subframe_header(s, base_channel, block_index))) yading@10: return ret; yading@10: } yading@10: yading@10: /* Read subsubframe */ yading@10: #ifdef TRACE yading@10: av_log(s->avctx, AV_LOG_DEBUG, "DSYNC dca_subsubframe\n"); yading@10: #endif yading@10: if ((ret = dca_subsubframe(s, base_channel, block_index))) yading@10: return ret; yading@10: yading@10: /* Update state */ yading@10: s->current_subsubframe++; yading@10: if (s->current_subsubframe >= s->subsubframes[s->current_subframe]) { yading@10: s->current_subsubframe = 0; yading@10: s->current_subframe++; yading@10: } yading@10: if (s->current_subframe >= s->subframes) { yading@10: #ifdef TRACE yading@10: av_log(s->avctx, AV_LOG_DEBUG, "DSYNC dca_subframe_footer\n"); yading@10: #endif yading@10: /* Read subframe footer */ yading@10: if ((ret = dca_subframe_footer(s, base_channel))) yading@10: return ret; yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: /** yading@10: * Return the number of channels in an ExSS speaker mask (HD) yading@10: */ yading@10: static int dca_exss_mask2count(int mask) yading@10: { yading@10: /* count bits that mean speaker pairs twice */ yading@10: return av_popcount(mask) + yading@10: av_popcount(mask & (DCA_EXSS_CENTER_LEFT_RIGHT | yading@10: DCA_EXSS_FRONT_LEFT_RIGHT | yading@10: DCA_EXSS_FRONT_HIGH_LEFT_RIGHT | yading@10: DCA_EXSS_WIDE_LEFT_RIGHT | yading@10: DCA_EXSS_SIDE_LEFT_RIGHT | yading@10: DCA_EXSS_SIDE_HIGH_LEFT_RIGHT | yading@10: DCA_EXSS_SIDE_REAR_LEFT_RIGHT | yading@10: DCA_EXSS_REAR_LEFT_RIGHT | yading@10: DCA_EXSS_REAR_HIGH_LEFT_RIGHT)); yading@10: } yading@10: yading@10: /** yading@10: * Skip mixing coefficients of a single mix out configuration (HD) yading@10: */ yading@10: static void dca_exss_skip_mix_coeffs(GetBitContext *gb, int channels, int out_ch) yading@10: { yading@10: int i; yading@10: yading@10: for (i = 0; i < channels; i++) { yading@10: int mix_map_mask = get_bits(gb, out_ch); yading@10: int num_coeffs = av_popcount(mix_map_mask); yading@10: skip_bits_long(gb, num_coeffs * 6); yading@10: } yading@10: } yading@10: yading@10: /** yading@10: * Parse extension substream asset header (HD) yading@10: */ yading@10: static int dca_exss_parse_asset_header(DCAContext *s) yading@10: { yading@10: int header_pos = get_bits_count(&s->gb); yading@10: int header_size; yading@10: int channels = 0; yading@10: int embedded_stereo = 0; yading@10: int embedded_6ch = 0; yading@10: int drc_code_present; yading@10: int av_uninit(extensions_mask); yading@10: int i, j; yading@10: yading@10: if (get_bits_left(&s->gb) < 16) yading@10: return -1; yading@10: yading@10: /* We will parse just enough to get to the extensions bitmask with which yading@10: * we can set the profile value. */ yading@10: yading@10: header_size = get_bits(&s->gb, 9) + 1; yading@10: skip_bits(&s->gb, 3); // asset index yading@10: yading@10: if (s->static_fields) { yading@10: if (get_bits1(&s->gb)) yading@10: skip_bits(&s->gb, 4); // asset type descriptor yading@10: if (get_bits1(&s->gb)) yading@10: skip_bits_long(&s->gb, 24); // language descriptor yading@10: yading@10: if (get_bits1(&s->gb)) { yading@10: /* How can one fit 1024 bytes of text here if the maximum value yading@10: * for the asset header size field above was 512 bytes? */ yading@10: int text_length = get_bits(&s->gb, 10) + 1; yading@10: if (get_bits_left(&s->gb) < text_length * 8) yading@10: return -1; yading@10: skip_bits_long(&s->gb, text_length * 8); // info text yading@10: } yading@10: yading@10: skip_bits(&s->gb, 5); // bit resolution - 1 yading@10: skip_bits(&s->gb, 4); // max sample rate code yading@10: channels = get_bits(&s->gb, 8) + 1; yading@10: yading@10: if (get_bits1(&s->gb)) { // 1-to-1 channels to speakers yading@10: int spkr_remap_sets; yading@10: int spkr_mask_size = 16; yading@10: int num_spkrs[7]; yading@10: yading@10: if (channels > 2) yading@10: embedded_stereo = get_bits1(&s->gb); yading@10: if (channels > 6) yading@10: embedded_6ch = get_bits1(&s->gb); yading@10: yading@10: if (get_bits1(&s->gb)) { yading@10: spkr_mask_size = (get_bits(&s->gb, 2) + 1) << 2; yading@10: skip_bits(&s->gb, spkr_mask_size); // spkr activity mask yading@10: } yading@10: yading@10: spkr_remap_sets = get_bits(&s->gb, 3); yading@10: yading@10: for (i = 0; i < spkr_remap_sets; i++) { yading@10: /* std layout mask for each remap set */ yading@10: num_spkrs[i] = dca_exss_mask2count(get_bits(&s->gb, spkr_mask_size)); yading@10: } yading@10: yading@10: for (i = 0; i < spkr_remap_sets; i++) { yading@10: int num_dec_ch_remaps = get_bits(&s->gb, 5) + 1; yading@10: if (get_bits_left(&s->gb) < 0) yading@10: return -1; yading@10: yading@10: for (j = 0; j < num_spkrs[i]; j++) { yading@10: int remap_dec_ch_mask = get_bits_long(&s->gb, num_dec_ch_remaps); yading@10: int num_dec_ch = av_popcount(remap_dec_ch_mask); yading@10: skip_bits_long(&s->gb, num_dec_ch * 5); // remap codes yading@10: } yading@10: } yading@10: yading@10: } else { yading@10: skip_bits(&s->gb, 3); // representation type yading@10: } yading@10: } yading@10: yading@10: drc_code_present = get_bits1(&s->gb); yading@10: if (drc_code_present) yading@10: get_bits(&s->gb, 8); // drc code yading@10: yading@10: if (get_bits1(&s->gb)) yading@10: skip_bits(&s->gb, 5); // dialog normalization code yading@10: yading@10: if (drc_code_present && embedded_stereo) yading@10: get_bits(&s->gb, 8); // drc stereo code yading@10: yading@10: if (s->mix_metadata && get_bits1(&s->gb)) { yading@10: skip_bits(&s->gb, 1); // external mix yading@10: skip_bits(&s->gb, 6); // post mix gain code yading@10: yading@10: if (get_bits(&s->gb, 2) != 3) // mixer drc code yading@10: skip_bits(&s->gb, 3); // drc limit yading@10: else yading@10: skip_bits(&s->gb, 8); // custom drc code yading@10: yading@10: if (get_bits1(&s->gb)) // channel specific scaling yading@10: for (i = 0; i < s->num_mix_configs; i++) yading@10: skip_bits_long(&s->gb, s->mix_config_num_ch[i] * 6); // scale codes yading@10: else yading@10: skip_bits_long(&s->gb, s->num_mix_configs * 6); // scale codes yading@10: yading@10: for (i = 0; i < s->num_mix_configs; i++) { yading@10: if (get_bits_left(&s->gb) < 0) yading@10: return -1; yading@10: dca_exss_skip_mix_coeffs(&s->gb, channels, s->mix_config_num_ch[i]); yading@10: if (embedded_6ch) yading@10: dca_exss_skip_mix_coeffs(&s->gb, 6, s->mix_config_num_ch[i]); yading@10: if (embedded_stereo) yading@10: dca_exss_skip_mix_coeffs(&s->gb, 2, s->mix_config_num_ch[i]); yading@10: } yading@10: } yading@10: yading@10: switch (get_bits(&s->gb, 2)) { yading@10: case 0: extensions_mask = get_bits(&s->gb, 12); break; yading@10: case 1: extensions_mask = DCA_EXT_EXSS_XLL; break; yading@10: case 2: extensions_mask = DCA_EXT_EXSS_LBR; break; yading@10: case 3: extensions_mask = 0; /* aux coding */ break; yading@10: } yading@10: yading@10: /* not parsed further, we were only interested in the extensions mask */ yading@10: yading@10: if (get_bits_left(&s->gb) < 0) yading@10: return -1; yading@10: yading@10: if (get_bits_count(&s->gb) - header_pos > header_size * 8) { yading@10: av_log(s->avctx, AV_LOG_WARNING, "Asset header size mismatch.\n"); yading@10: return -1; yading@10: } yading@10: skip_bits_long(&s->gb, header_pos + header_size * 8 - get_bits_count(&s->gb)); yading@10: yading@10: if (extensions_mask & DCA_EXT_EXSS_XLL) yading@10: s->profile = FF_PROFILE_DTS_HD_MA; yading@10: else if (extensions_mask & (DCA_EXT_EXSS_XBR | DCA_EXT_EXSS_X96 | yading@10: DCA_EXT_EXSS_XXCH)) yading@10: s->profile = FF_PROFILE_DTS_HD_HRA; yading@10: yading@10: if (!(extensions_mask & DCA_EXT_CORE)) yading@10: av_log(s->avctx, AV_LOG_WARNING, "DTS core detection mismatch.\n"); yading@10: if ((extensions_mask & DCA_CORE_EXTS) != s->core_ext_mask) yading@10: av_log(s->avctx, AV_LOG_WARNING, yading@10: "DTS extensions detection mismatch (%d, %d)\n", yading@10: extensions_mask & DCA_CORE_EXTS, s->core_ext_mask); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static int dca_xbr_parse_frame(DCAContext *s) yading@10: { yading@10: int scale_table_high[DCA_CHSET_CHANS_MAX][DCA_SUBBANDS][2]; yading@10: int active_bands[DCA_CHSETS_MAX][DCA_CHSET_CHANS_MAX]; yading@10: int abits_high[DCA_CHSET_CHANS_MAX][DCA_SUBBANDS]; yading@10: int anctemp[DCA_CHSET_CHANS_MAX]; yading@10: int chset_fsize[DCA_CHSETS_MAX]; yading@10: int n_xbr_ch[DCA_CHSETS_MAX]; yading@10: int hdr_size, num_chsets, xbr_tmode, hdr_pos; yading@10: int i, j, k, l, chset, chan_base; yading@10: yading@10: av_log(s->avctx, AV_LOG_DEBUG, "DTS-XBR: decoding XBR extension\n"); yading@10: yading@10: /* get bit position of sync header */ yading@10: hdr_pos = get_bits_count(&s->gb) - 32; yading@10: yading@10: hdr_size = get_bits(&s->gb, 6) + 1; yading@10: num_chsets = get_bits(&s->gb, 2) + 1; yading@10: yading@10: for(i = 0; i < num_chsets; i++) yading@10: chset_fsize[i] = get_bits(&s->gb, 14) + 1; yading@10: yading@10: xbr_tmode = get_bits1(&s->gb); yading@10: yading@10: for(i = 0; i < num_chsets; i++) { yading@10: n_xbr_ch[i] = get_bits(&s->gb, 3) + 1; yading@10: k = get_bits(&s->gb, 2) + 5; yading@10: for(j = 0; j < n_xbr_ch[i]; j++) yading@10: active_bands[i][j] = get_bits(&s->gb, k) + 1; yading@10: } yading@10: yading@10: /* skip to the end of the header */ yading@10: i = get_bits_count(&s->gb); yading@10: if(hdr_pos + hdr_size * 8 > i) yading@10: skip_bits_long(&s->gb, hdr_pos + hdr_size * 8 - i); yading@10: yading@10: /* loop over the channel data sets */ yading@10: /* only decode as many channels as we've decoded base data for */ yading@10: for(chset = 0, chan_base = 0; yading@10: chset < num_chsets && chan_base + n_xbr_ch[chset] <= s->prim_channels; yading@10: chan_base += n_xbr_ch[chset++]) { yading@10: int start_posn = get_bits_count(&s->gb); yading@10: int subsubframe = 0; yading@10: int subframe = 0; yading@10: yading@10: /* loop over subframes */ yading@10: for (k = 0; k < (s->sample_blocks / 8); k++) { yading@10: /* parse header if we're on first subsubframe of a block */ yading@10: if(subsubframe == 0) { yading@10: /* Parse subframe header */ yading@10: for(i = 0; i < n_xbr_ch[chset]; i++) { yading@10: anctemp[i] = get_bits(&s->gb, 2) + 2; yading@10: } yading@10: yading@10: for(i = 0; i < n_xbr_ch[chset]; i++) { yading@10: get_array(&s->gb, abits_high[i], active_bands[chset][i], anctemp[i]); yading@10: } yading@10: yading@10: for(i = 0; i < n_xbr_ch[chset]; i++) { yading@10: anctemp[i] = get_bits(&s->gb, 3); yading@10: if(anctemp[i] < 1) { yading@10: av_log(s->avctx, AV_LOG_ERROR, "DTS-XBR: SYNC ERROR\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: } yading@10: yading@10: /* generate scale factors */ yading@10: for(i = 0; i < n_xbr_ch[chset]; i++) { yading@10: const uint32_t *scale_table; yading@10: int nbits; yading@10: yading@10: if (s->scalefactor_huffman[chan_base+i] == 6) { yading@10: scale_table = scale_factor_quant7; yading@10: } else { yading@10: scale_table = scale_factor_quant6; yading@10: } yading@10: yading@10: nbits = anctemp[i]; yading@10: yading@10: for(j = 0; j < active_bands[chset][i]; j++) { yading@10: if(abits_high[i][j] > 0) { yading@10: scale_table_high[i][j][0] = yading@10: scale_table[get_bits(&s->gb, nbits)]; yading@10: yading@10: if(xbr_tmode && s->transition_mode[i][j]) { yading@10: scale_table_high[i][j][1] = yading@10: scale_table[get_bits(&s->gb, nbits)]; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: /* decode audio array for this block */ yading@10: for(i = 0; i < n_xbr_ch[chset]; i++) { yading@10: for(j = 0; j < active_bands[chset][i]; j++) { yading@10: const int xbr_abits = abits_high[i][j]; yading@10: const float quant_step_size = lossless_quant_d[xbr_abits]; yading@10: const int sfi = xbr_tmode && s->transition_mode[i][j] && subsubframe >= s->transition_mode[i][j]; yading@10: const float rscale = quant_step_size * scale_table_high[i][j][sfi]; yading@10: float *subband_samples = s->subband_samples[k][chan_base+i][j]; yading@10: int block[8]; yading@10: yading@10: if(xbr_abits <= 0) yading@10: continue; yading@10: yading@10: if(xbr_abits > 7) { yading@10: get_array(&s->gb, block, 8, xbr_abits - 3); yading@10: } else { yading@10: int block_code1, block_code2, size, levels, err; yading@10: yading@10: size = abits_sizes[xbr_abits - 1]; yading@10: levels = abits_levels[xbr_abits - 1]; yading@10: yading@10: block_code1 = get_bits(&s->gb, size); yading@10: block_code2 = get_bits(&s->gb, size); yading@10: err = decode_blockcodes(block_code1, block_code2, yading@10: levels, block); yading@10: if (err) { yading@10: av_log(s->avctx, AV_LOG_ERROR, yading@10: "ERROR: DTS-XBR: block code look-up failed\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: } yading@10: yading@10: /* scale & sum into subband */ yading@10: for(l = 0; l < 8; l++) yading@10: subband_samples[l] += (float)block[l] * rscale; yading@10: } yading@10: } yading@10: yading@10: /* check DSYNC marker */ yading@10: if(s->aspf || subsubframe == s->subsubframes[subframe] - 1) { yading@10: if(get_bits(&s->gb, 16) != 0xffff) { yading@10: av_log(s->avctx, AV_LOG_ERROR, "DTS-XBR: Didn't get subframe DSYNC\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: } yading@10: yading@10: /* advance sub-sub-frame index */ yading@10: if(++subsubframe >= s->subsubframes[subframe]) { yading@10: subsubframe = 0; yading@10: subframe++; yading@10: } yading@10: } yading@10: yading@10: /* skip to next channel set */ yading@10: i = get_bits_count(&s->gb); yading@10: if(start_posn + chset_fsize[chset] * 8 != i) { yading@10: j = start_posn + chset_fsize[chset] * 8 - i; yading@10: if(j < 0 || j >= 8) yading@10: av_log(s->avctx, AV_LOG_ERROR, "DTS-XBR: end of channel set," yading@10: " skipping further than expected (%d bits)\n", j); yading@10: skip_bits_long(&s->gb, j); yading@10: } yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: /* parse initial header for XXCH and dump details */ yading@10: static int dca_xxch_decode_frame(DCAContext *s) yading@10: { yading@10: int hdr_size, spkmsk_bits, num_chsets, core_spk, hdr_pos; yading@10: int i, chset, base_channel, chstart, fsize[8]; yading@10: yading@10: /* assume header word has already been parsed */ yading@10: hdr_pos = get_bits_count(&s->gb) - 32; yading@10: hdr_size = get_bits(&s->gb, 6) + 1; yading@10: /*chhdr_crc =*/ skip_bits1(&s->gb); yading@10: spkmsk_bits = get_bits(&s->gb, 5) + 1; yading@10: num_chsets = get_bits(&s->gb, 2) + 1; yading@10: yading@10: for (i = 0; i < num_chsets; i++) yading@10: fsize[i] = get_bits(&s->gb, 14) + 1; yading@10: yading@10: core_spk = get_bits(&s->gb, spkmsk_bits); yading@10: s->xxch_core_spkmask = core_spk; yading@10: s->xxch_nbits_spk_mask = spkmsk_bits; yading@10: s->xxch_dmix_embedded = 0; yading@10: yading@10: /* skip to the end of the header */ yading@10: i = get_bits_count(&s->gb); yading@10: if (hdr_pos + hdr_size * 8 > i) yading@10: skip_bits_long(&s->gb, hdr_pos + hdr_size * 8 - i); yading@10: yading@10: for (chset = 0; chset < num_chsets; chset++) { yading@10: chstart = get_bits_count(&s->gb); yading@10: base_channel = s->prim_channels; yading@10: s->xxch_chset = chset; yading@10: yading@10: /* XXCH and Core headers differ, see 6.4.2 "XXCH Channel Set Header" vs. yading@10: 5.3.2 "Primary Audio Coding Header", DTS Spec 1.3.1 */ yading@10: dca_parse_audio_coding_header(s, base_channel, 1); yading@10: yading@10: /* decode channel data */ yading@10: for (i = 0; i < (s->sample_blocks / 8); i++) { yading@10: if (dca_decode_block(s, base_channel, i)) { yading@10: av_log(s->avctx, AV_LOG_ERROR, yading@10: "Error decoding DTS-XXCH extension\n"); yading@10: continue; yading@10: } yading@10: } yading@10: yading@10: /* skip to end of this section */ yading@10: i = get_bits_count(&s->gb); yading@10: if (chstart + fsize[chset] * 8 > i) yading@10: skip_bits_long(&s->gb, chstart + fsize[chset] * 8 - i); yading@10: } yading@10: s->xxch_chset = num_chsets; yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: /** yading@10: * Parse extension substream header (HD) yading@10: */ yading@10: static void dca_exss_parse_header(DCAContext *s) yading@10: { yading@10: int asset_size[8]; yading@10: int ss_index; yading@10: int blownup; yading@10: int num_audiop = 1; yading@10: int num_assets = 1; yading@10: int active_ss_mask[8]; yading@10: int i, j; yading@10: int start_posn; yading@10: int hdrsize; yading@10: uint32_t mkr; yading@10: yading@10: if (get_bits_left(&s->gb) < 52) yading@10: return; yading@10: yading@10: start_posn = get_bits_count(&s->gb) - 32; yading@10: yading@10: skip_bits(&s->gb, 8); // user data yading@10: ss_index = get_bits(&s->gb, 2); yading@10: yading@10: blownup = get_bits1(&s->gb); yading@10: hdrsize = get_bits(&s->gb, 8 + 4 * blownup) + 1; // header_size yading@10: skip_bits(&s->gb, 16 + 4 * blownup); // hd_size yading@10: yading@10: s->static_fields = get_bits1(&s->gb); yading@10: if (s->static_fields) { yading@10: skip_bits(&s->gb, 2); // reference clock code yading@10: skip_bits(&s->gb, 3); // frame duration code yading@10: yading@10: if (get_bits1(&s->gb)) yading@10: skip_bits_long(&s->gb, 36); // timestamp yading@10: yading@10: /* a single stream can contain multiple audio assets that can be yading@10: * combined to form multiple audio presentations */ yading@10: yading@10: num_audiop = get_bits(&s->gb, 3) + 1; yading@10: if (num_audiop > 1) { yading@10: avpriv_request_sample(s->avctx, yading@10: "Multiple DTS-HD audio presentations"); yading@10: /* ignore such streams for now */ yading@10: return; yading@10: } yading@10: yading@10: num_assets = get_bits(&s->gb, 3) + 1; yading@10: if (num_assets > 1) { yading@10: avpriv_request_sample(s->avctx, "Multiple DTS-HD audio assets"); yading@10: /* ignore such streams for now */ yading@10: return; yading@10: } yading@10: yading@10: for (i = 0; i < num_audiop; i++) yading@10: active_ss_mask[i] = get_bits(&s->gb, ss_index + 1); yading@10: yading@10: for (i = 0; i < num_audiop; i++) yading@10: for (j = 0; j <= ss_index; j++) yading@10: if (active_ss_mask[i] & (1 << j)) yading@10: skip_bits(&s->gb, 8); // active asset mask yading@10: yading@10: s->mix_metadata = get_bits1(&s->gb); yading@10: if (s->mix_metadata) { yading@10: int mix_out_mask_size; yading@10: yading@10: skip_bits(&s->gb, 2); // adjustment level yading@10: mix_out_mask_size = (get_bits(&s->gb, 2) + 1) << 2; yading@10: s->num_mix_configs = get_bits(&s->gb, 2) + 1; yading@10: yading@10: for (i = 0; i < s->num_mix_configs; i++) { yading@10: int mix_out_mask = get_bits(&s->gb, mix_out_mask_size); yading@10: s->mix_config_num_ch[i] = dca_exss_mask2count(mix_out_mask); yading@10: } yading@10: } yading@10: } yading@10: yading@10: for (i = 0; i < num_assets; i++) yading@10: asset_size[i] = get_bits_long(&s->gb, 16 + 4 * blownup); yading@10: yading@10: for (i = 0; i < num_assets; i++) { yading@10: if (dca_exss_parse_asset_header(s)) yading@10: return; yading@10: } yading@10: yading@10: /* not parsed further, we were only interested in the extensions mask yading@10: * from the asset header */ yading@10: yading@10: if (num_assets > 0) { yading@10: j = get_bits_count(&s->gb); yading@10: if (start_posn + hdrsize * 8 > j) yading@10: skip_bits_long(&s->gb, start_posn + hdrsize * 8 - j); yading@10: yading@10: for (i = 0; i < num_assets; i++) { yading@10: start_posn = get_bits_count(&s->gb); yading@10: mkr = get_bits_long(&s->gb, 32); yading@10: yading@10: /* parse extensions that we know about */ yading@10: if (mkr == 0x655e315e) { yading@10: dca_xbr_parse_frame(s); yading@10: } else if (mkr == 0x47004a03) { yading@10: dca_xxch_decode_frame(s); yading@10: s->core_ext_mask |= DCA_EXT_XXCH; /* xxx use for chan reordering */ yading@10: } else { yading@10: av_log(s->avctx, AV_LOG_DEBUG, yading@10: "DTS-ExSS: unknown marker = 0x%08x\n", mkr); yading@10: } yading@10: yading@10: /* skip to end of block */ yading@10: j = get_bits_count(&s->gb); yading@10: if (start_posn + asset_size[i] * 8 > j) yading@10: skip_bits_long(&s->gb, start_posn + asset_size[i] * 8 - j); yading@10: } yading@10: } yading@10: } yading@10: yading@10: /** yading@10: * Main frame decoding function yading@10: * FIXME add arguments yading@10: */ yading@10: static int dca_decode_frame(AVCodecContext *avctx, void *data, yading@10: int *got_frame_ptr, AVPacket *avpkt) yading@10: { yading@10: AVFrame *frame = data; yading@10: const uint8_t *buf = avpkt->data; yading@10: int buf_size = avpkt->size; yading@10: int channel_mask; yading@10: int channel_layout; yading@10: int lfe_samples; yading@10: int num_core_channels = 0; yading@10: int i, ret; yading@10: float **samples_flt; yading@10: float *src_chan; yading@10: float *dst_chan; yading@10: DCAContext *s = avctx->priv_data; yading@10: int core_ss_end; yading@10: int channels, full_channels; yading@10: float scale; yading@10: int achan; yading@10: int chset; yading@10: int mask; yading@10: int lavc; yading@10: int posn; yading@10: int j, k; yading@10: int endch; yading@10: yading@10: s->xch_present = 0; yading@10: yading@10: s->dca_buffer_size = ff_dca_convert_bitstream(buf, buf_size, s->dca_buffer, yading@10: DCA_MAX_FRAME_SIZE + DCA_MAX_EXSS_HEADER_SIZE); yading@10: if (s->dca_buffer_size == AVERROR_INVALIDDATA) { yading@10: av_log(avctx, AV_LOG_ERROR, "Not a valid DCA frame\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: init_get_bits(&s->gb, s->dca_buffer, s->dca_buffer_size * 8); yading@10: if ((ret = dca_parse_frame_header(s)) < 0) { yading@10: //seems like the frame is corrupt, try with the next one yading@10: return ret; yading@10: } yading@10: //set AVCodec values with parsed data yading@10: avctx->sample_rate = s->sample_rate; yading@10: avctx->bit_rate = s->bit_rate; yading@10: yading@10: s->profile = FF_PROFILE_DTS; yading@10: yading@10: for (i = 0; i < (s->sample_blocks / 8); i++) { yading@10: if ((ret = dca_decode_block(s, 0, i))) { yading@10: av_log(avctx, AV_LOG_ERROR, "error decoding block\n"); yading@10: return ret; yading@10: } yading@10: } yading@10: yading@10: /* record number of core channels incase less than max channels are requested */ yading@10: num_core_channels = s->prim_channels; yading@10: yading@10: if (s->ext_coding) yading@10: s->core_ext_mask = dca_ext_audio_descr_mask[s->ext_descr]; yading@10: else yading@10: s->core_ext_mask = 0; yading@10: yading@10: core_ss_end = FFMIN(s->frame_size, s->dca_buffer_size) * 8; yading@10: yading@10: /* only scan for extensions if ext_descr was unknown or indicated a yading@10: * supported XCh extension */ yading@10: if (s->core_ext_mask < 0 || s->core_ext_mask & (DCA_EXT_XCH | DCA_EXT_XXCH)) { yading@10: yading@10: /* if ext_descr was unknown, clear s->core_ext_mask so that the yading@10: * extensions scan can fill it up */ yading@10: s->core_ext_mask = FFMAX(s->core_ext_mask, 0); yading@10: yading@10: /* extensions start at 32-bit boundaries into bitstream */ yading@10: skip_bits_long(&s->gb, (-get_bits_count(&s->gb)) & 31); yading@10: yading@10: while (core_ss_end - get_bits_count(&s->gb) >= 32) { yading@10: uint32_t bits = get_bits_long(&s->gb, 32); yading@10: yading@10: switch (bits) { yading@10: case 0x5a5a5a5a: { yading@10: int ext_amode, xch_fsize; yading@10: yading@10: s->xch_base_channel = s->prim_channels; yading@10: yading@10: /* validate sync word using XCHFSIZE field */ yading@10: xch_fsize = show_bits(&s->gb, 10); yading@10: if ((s->frame_size != (get_bits_count(&s->gb) >> 3) - 4 + xch_fsize) && yading@10: (s->frame_size != (get_bits_count(&s->gb) >> 3) - 4 + xch_fsize + 1)) yading@10: continue; yading@10: yading@10: /* skip length-to-end-of-frame field for the moment */ yading@10: skip_bits(&s->gb, 10); yading@10: yading@10: s->core_ext_mask |= DCA_EXT_XCH; yading@10: yading@10: /* extension amode(number of channels in extension) should be 1 */ yading@10: /* AFAIK XCh is not used for more channels */ yading@10: if ((ext_amode = get_bits(&s->gb, 4)) != 1) { yading@10: av_log(avctx, AV_LOG_ERROR, "XCh extension amode %d not" yading@10: " supported!\n", ext_amode); yading@10: continue; yading@10: } yading@10: yading@10: if (s->xch_base_channel < 2) { yading@10: avpriv_request_sample(avctx, "XCh with fewer than 2 base channels"); yading@10: continue; yading@10: } yading@10: yading@10: /* much like core primary audio coding header */ yading@10: dca_parse_audio_coding_header(s, s->xch_base_channel, 0); yading@10: yading@10: for (i = 0; i < (s->sample_blocks / 8); i++) yading@10: if ((ret = dca_decode_block(s, s->xch_base_channel, i))) { yading@10: av_log(avctx, AV_LOG_ERROR, "error decoding XCh extension\n"); yading@10: continue; yading@10: } yading@10: yading@10: s->xch_present = 1; yading@10: break; yading@10: } yading@10: case 0x47004a03: yading@10: /* XXCh: extended channels */ yading@10: /* usually found either in core or HD part in DTS-HD HRA streams, yading@10: * but not in DTS-ES which contains XCh extensions instead */ yading@10: s->core_ext_mask |= DCA_EXT_XXCH; yading@10: dca_xxch_decode_frame(s); yading@10: break; yading@10: yading@10: case 0x1d95f262: { yading@10: int fsize96 = show_bits(&s->gb, 12) + 1; yading@10: if (s->frame_size != (get_bits_count(&s->gb) >> 3) - 4 + fsize96) yading@10: continue; yading@10: yading@10: av_log(avctx, AV_LOG_DEBUG, "X96 extension found at %d bits\n", yading@10: get_bits_count(&s->gb)); yading@10: skip_bits(&s->gb, 12); yading@10: av_log(avctx, AV_LOG_DEBUG, "FSIZE96 = %d bytes\n", fsize96); yading@10: av_log(avctx, AV_LOG_DEBUG, "REVNO = %d\n", get_bits(&s->gb, 4)); yading@10: yading@10: s->core_ext_mask |= DCA_EXT_X96; yading@10: break; yading@10: } yading@10: } yading@10: yading@10: skip_bits_long(&s->gb, (-get_bits_count(&s->gb)) & 31); yading@10: } yading@10: } else { yading@10: /* no supported extensions, skip the rest of the core substream */ yading@10: skip_bits_long(&s->gb, core_ss_end - get_bits_count(&s->gb)); yading@10: } yading@10: yading@10: if (s->core_ext_mask & DCA_EXT_X96) yading@10: s->profile = FF_PROFILE_DTS_96_24; yading@10: else if (s->core_ext_mask & (DCA_EXT_XCH | DCA_EXT_XXCH)) yading@10: s->profile = FF_PROFILE_DTS_ES; yading@10: yading@10: /* check for ExSS (HD part) */ yading@10: if (s->dca_buffer_size - s->frame_size > 32 && yading@10: get_bits_long(&s->gb, 32) == DCA_HD_MARKER) yading@10: dca_exss_parse_header(s); yading@10: yading@10: avctx->profile = s->profile; yading@10: yading@10: full_channels = channels = s->prim_channels + !!s->lfe; yading@10: yading@10: /* If we have XXCH then the channel layout is managed differently */ yading@10: /* note that XLL will also have another way to do things */ yading@10: if (!(s->core_ext_mask & DCA_EXT_XXCH) yading@10: || (s->core_ext_mask & DCA_EXT_XXCH && avctx->request_channels > 0 yading@10: && avctx->request_channels yading@10: < num_core_channels + !!s->lfe + s->xxch_chset_nch[0])) yading@10: { /* xxx should also do MA extensions */ yading@10: if (s->amode < 16) { yading@10: avctx->channel_layout = dca_core_channel_layout[s->amode]; yading@10: yading@10: if (s->xch_present && (!avctx->request_channels || yading@10: avctx->request_channels yading@10: > num_core_channels + !!s->lfe)) { yading@10: avctx->channel_layout |= AV_CH_BACK_CENTER; yading@10: if (s->lfe) { yading@10: avctx->channel_layout |= AV_CH_LOW_FREQUENCY; yading@10: s->channel_order_tab = dca_channel_reorder_lfe_xch[s->amode]; yading@10: } else { yading@10: s->channel_order_tab = dca_channel_reorder_nolfe_xch[s->amode]; yading@10: } yading@10: if (s->channel_order_tab[s->xch_base_channel] < 0) yading@10: return AVERROR_INVALIDDATA; yading@10: } else { yading@10: channels = num_core_channels + !!s->lfe; yading@10: s->xch_present = 0; /* disable further xch processing */ yading@10: if (s->lfe) { yading@10: avctx->channel_layout |= AV_CH_LOW_FREQUENCY; yading@10: s->channel_order_tab = dca_channel_reorder_lfe[s->amode]; yading@10: } else yading@10: s->channel_order_tab = dca_channel_reorder_nolfe[s->amode]; yading@10: } yading@10: yading@10: if (channels > !!s->lfe && yading@10: s->channel_order_tab[channels - 1 - !!s->lfe] < 0) yading@10: return AVERROR_INVALIDDATA; yading@10: yading@10: if (av_get_channel_layout_nb_channels(avctx->channel_layout) != channels) { yading@10: av_log(avctx, AV_LOG_ERROR, "Number of channels %d mismatches layout %d\n", channels, av_get_channel_layout_nb_channels(avctx->channel_layout)); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: if (avctx->request_channels == 2 && s->prim_channels > 2) { yading@10: channels = 2; yading@10: s->output = DCA_STEREO; yading@10: avctx->channel_layout = AV_CH_LAYOUT_STEREO; yading@10: } yading@10: else if (avctx->request_channel_layout & AV_CH_LAYOUT_NATIVE) { yading@10: static const int8_t dca_channel_order_native[9] = { 0, 1, 2, 3, 4, 5, 6, 7, 8 }; yading@10: s->channel_order_tab = dca_channel_order_native; yading@10: } yading@10: s->lfe_index = dca_lfe_index[s->amode]; yading@10: } else { yading@10: av_log(avctx, AV_LOG_ERROR, yading@10: "Non standard configuration %d !\n", s->amode); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: s->xxch_dmix_embedded = 0; yading@10: } else { yading@10: /* we only get here if an XXCH channel set can be added to the mix */ yading@10: channel_mask = s->xxch_core_spkmask; yading@10: yading@10: if (avctx->request_channels > 0 yading@10: && avctx->request_channels < s->prim_channels) { yading@10: channels = num_core_channels + !!s->lfe; yading@10: for (i = 0; i < s->xxch_chset && channels + s->xxch_chset_nch[i] yading@10: <= avctx->request_channels; i++) { yading@10: channels += s->xxch_chset_nch[i]; yading@10: channel_mask |= s->xxch_spk_masks[i]; yading@10: } yading@10: } else { yading@10: channels = s->prim_channels + !!s->lfe; yading@10: for (i = 0; i < s->xxch_chset; i++) { yading@10: channel_mask |= s->xxch_spk_masks[i]; yading@10: } yading@10: } yading@10: yading@10: /* Given the DTS spec'ed channel mask, generate an avcodec version */ yading@10: channel_layout = 0; yading@10: for (i = 0; i < s->xxch_nbits_spk_mask; ++i) { yading@10: if (channel_mask & (1 << i)) { yading@10: channel_layout |= map_xxch_to_native[i]; yading@10: } yading@10: } yading@10: yading@10: /* make sure that we have managed to get equivelant dts/avcodec channel yading@10: * masks in some sense -- unfortunately some channels could overlap */ yading@10: if (av_popcount(channel_mask) != av_popcount(channel_layout)) { yading@10: av_log(avctx, AV_LOG_DEBUG, yading@10: "DTS-XXCH: Inconsistant avcodec/dts channel layouts\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: avctx->channel_layout = channel_layout; yading@10: yading@10: if (!(avctx->request_channel_layout & AV_CH_LAYOUT_NATIVE)) { yading@10: /* Estimate DTS --> avcodec ordering table */ yading@10: for (chset = -1, j = 0; chset < s->xxch_chset; ++chset) { yading@10: mask = chset >= 0 ? s->xxch_spk_masks[chset] yading@10: : s->xxch_core_spkmask; yading@10: for (i = 0; i < s->xxch_nbits_spk_mask; i++) { yading@10: if (mask & ~(DCA_XXCH_LFE1 | DCA_XXCH_LFE2) & (1 << i)) { yading@10: lavc = map_xxch_to_native[i]; yading@10: posn = av_popcount(channel_layout & (lavc - 1)); yading@10: s->xxch_order_tab[j++] = posn; yading@10: } yading@10: } yading@10: } yading@10: yading@10: s->lfe_index = av_popcount(channel_layout & (AV_CH_LOW_FREQUENCY-1)); yading@10: } else { /* native ordering */ yading@10: for (i = 0; i < channels; i++) yading@10: s->xxch_order_tab[i] = i; yading@10: yading@10: s->lfe_index = channels - 1; yading@10: } yading@10: yading@10: s->channel_order_tab = s->xxch_order_tab; yading@10: } yading@10: yading@10: if (avctx->channels != channels) { yading@10: if (avctx->channels) yading@10: av_log(avctx, AV_LOG_INFO, "Number of channels changed in DCA decoder (%d -> %d)\n", avctx->channels, channels); yading@10: avctx->channels = channels; yading@10: } yading@10: yading@10: /* get output buffer */ yading@10: frame->nb_samples = 256 * (s->sample_blocks / 8); yading@10: if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) yading@10: return ret; yading@10: samples_flt = (float **)frame->extended_data; yading@10: yading@10: /* allocate buffer for extra channels if downmixing */ yading@10: if (avctx->channels < full_channels) { yading@10: ret = av_samples_get_buffer_size(NULL, full_channels - channels, yading@10: frame->nb_samples, yading@10: avctx->sample_fmt, 0); yading@10: if (ret < 0) yading@10: return ret; yading@10: yading@10: av_fast_malloc(&s->extra_channels_buffer, yading@10: &s->extra_channels_buffer_size, ret); yading@10: if (!s->extra_channels_buffer) yading@10: return AVERROR(ENOMEM); yading@10: yading@10: ret = av_samples_fill_arrays((uint8_t **)s->extra_channels, NULL, yading@10: s->extra_channels_buffer, yading@10: full_channels - channels, yading@10: frame->nb_samples, avctx->sample_fmt, 0); yading@10: if (ret < 0) yading@10: return ret; yading@10: } yading@10: yading@10: /* filter to get final output */ yading@10: for (i = 0; i < (s->sample_blocks / 8); i++) { yading@10: int ch; yading@10: yading@10: for (ch = 0; ch < channels; ch++) yading@10: s->samples_chanptr[ch] = samples_flt[ch] + i * 256; yading@10: for (; ch < full_channels; ch++) yading@10: s->samples_chanptr[ch] = s->extra_channels[ch - channels] + i * 256; yading@10: yading@10: dca_filter_channels(s, i); yading@10: yading@10: /* If this was marked as a DTS-ES stream we need to subtract back- */ yading@10: /* channel from SL & SR to remove matrixed back-channel signal */ yading@10: if ((s->source_pcm_res & 1) && s->xch_present) { yading@10: float *back_chan = s->samples_chanptr[s->channel_order_tab[s->xch_base_channel]]; yading@10: float *lt_chan = s->samples_chanptr[s->channel_order_tab[s->xch_base_channel - 2]]; yading@10: float *rt_chan = s->samples_chanptr[s->channel_order_tab[s->xch_base_channel - 1]]; yading@10: s->fdsp.vector_fmac_scalar(lt_chan, back_chan, -M_SQRT1_2, 256); yading@10: s->fdsp.vector_fmac_scalar(rt_chan, back_chan, -M_SQRT1_2, 256); yading@10: } yading@10: yading@10: /* If stream contains XXCH, we might need to undo an embedded downmix */ yading@10: if (s->xxch_dmix_embedded) { yading@10: /* Loop over channel sets in turn */ yading@10: ch = num_core_channels; yading@10: for (chset = 0; chset < s->xxch_chset; chset++) { yading@10: endch = ch + s->xxch_chset_nch[chset]; yading@10: mask = s->xxch_dmix_embedded; yading@10: yading@10: /* undo downmix */ yading@10: for (j = ch; j < endch; j++) { yading@10: if (mask & (1 << j)) { /* this channel has been mixed-out */ yading@10: src_chan = s->samples_chanptr[s->channel_order_tab[j]]; yading@10: for (k = 0; k < endch; k++) { yading@10: achan = s->channel_order_tab[k]; yading@10: scale = s->xxch_dmix_coeff[j][k]; yading@10: if (scale != 0.0) { yading@10: dst_chan = s->samples_chanptr[achan]; yading@10: s->fdsp.vector_fmac_scalar(dst_chan, src_chan, yading@10: -scale, 256); yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: /* if a downmix has been embedded then undo the pre-scaling */ yading@10: if ((mask & (1 << ch)) && s->xxch_dmix_sf[chset] != 1.0f) { yading@10: scale = s->xxch_dmix_sf[chset]; yading@10: yading@10: for (j = 0; j < ch; j++) { yading@10: src_chan = s->samples_chanptr[s->channel_order_tab[j]]; yading@10: for (k = 0; k < 256; k++) yading@10: src_chan[k] *= scale; yading@10: } yading@10: yading@10: /* LFE channel is always part of core, scale if it exists */ yading@10: if (s->lfe) { yading@10: src_chan = s->samples_chanptr[s->lfe_index]; yading@10: for (k = 0; k < 256; k++) yading@10: src_chan[k] *= scale; yading@10: } yading@10: } yading@10: yading@10: ch = endch; yading@10: } yading@10: yading@10: } yading@10: } yading@10: yading@10: /* update lfe history */ yading@10: lfe_samples = 2 * s->lfe * (s->sample_blocks / 8); yading@10: for (i = 0; i < 2 * s->lfe * 4; i++) yading@10: s->lfe_data[i] = s->lfe_data[i + lfe_samples]; yading@10: yading@10: *got_frame_ptr = 1; yading@10: yading@10: return buf_size; yading@10: } yading@10: yading@10: yading@10: yading@10: /** yading@10: * DCA initialization yading@10: * yading@10: * @param avctx pointer to the AVCodecContext yading@10: */ yading@10: yading@10: static av_cold int dca_decode_init(AVCodecContext *avctx) yading@10: { yading@10: DCAContext *s = avctx->priv_data; yading@10: yading@10: s->avctx = avctx; yading@10: dca_init_vlcs(); yading@10: yading@10: avpriv_float_dsp_init(&s->fdsp, avctx->flags & CODEC_FLAG_BITEXACT); yading@10: ff_mdct_init(&s->imdct, 6, 1, 1.0); yading@10: ff_synth_filter_init(&s->synth); yading@10: ff_dcadsp_init(&s->dcadsp); yading@10: ff_fmt_convert_init(&s->fmt_conv, avctx); yading@10: yading@10: avctx->sample_fmt = AV_SAMPLE_FMT_FLTP; yading@10: yading@10: /* allow downmixing to stereo */ yading@10: if (avctx->channels > 0 && avctx->request_channels < avctx->channels && yading@10: avctx->request_channels == 2) { yading@10: avctx->channels = avctx->request_channels; yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: static av_cold int dca_decode_end(AVCodecContext *avctx) yading@10: { yading@10: DCAContext *s = avctx->priv_data; yading@10: ff_mdct_end(&s->imdct); yading@10: av_freep(&s->extra_channels_buffer); yading@10: return 0; yading@10: } yading@10: yading@10: static const AVProfile profiles[] = { yading@10: { FF_PROFILE_DTS, "DTS" }, yading@10: { FF_PROFILE_DTS_ES, "DTS-ES" }, yading@10: { FF_PROFILE_DTS_96_24, "DTS 96/24" }, yading@10: { FF_PROFILE_DTS_HD_HRA, "DTS-HD HRA" }, yading@10: { FF_PROFILE_DTS_HD_MA, "DTS-HD MA" }, yading@10: { FF_PROFILE_UNKNOWN }, yading@10: }; yading@10: yading@10: AVCodec ff_dca_decoder = { yading@10: .name = "dca", yading@10: .type = AVMEDIA_TYPE_AUDIO, yading@10: .id = AV_CODEC_ID_DTS, yading@10: .priv_data_size = sizeof(DCAContext), yading@10: .init = dca_decode_init, yading@10: .decode = dca_decode_frame, yading@10: .close = dca_decode_end, yading@10: .long_name = NULL_IF_CONFIG_SMALL("DCA (DTS Coherent Acoustics)"), yading@10: .capabilities = CODEC_CAP_CHANNEL_CONF | CODEC_CAP_DR1, yading@10: .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, yading@10: AV_SAMPLE_FMT_NONE }, yading@10: .profiles = NULL_IF_CONFIG_SMALL(profiles), yading@10: };