yading@10: /* yading@10: * QDM2 compatible decoder yading@10: * Copyright (c) 2003 Ewald Snel yading@10: * Copyright (c) 2005 Benjamin Larsson yading@10: * Copyright (c) 2005 Alex Beregszaszi yading@10: * Copyright (c) 2005 Roberto Togni 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: /** yading@10: * @file yading@10: * QDM2 decoder yading@10: * @author Ewald Snel, Benjamin Larsson, Alex Beregszaszi, Roberto Togni yading@10: * yading@10: * The decoder is not perfect yet, there are still some distortions yading@10: * especially on files encoded with 16 or 8 subbands. yading@10: */ yading@10: yading@10: #include yading@10: #include yading@10: #include yading@10: yading@10: #define BITSTREAM_READER_LE yading@10: #include "libavutil/channel_layout.h" yading@10: #include "avcodec.h" yading@10: #include "get_bits.h" yading@10: #include "internal.h" yading@10: #include "rdft.h" yading@10: #include "mpegaudiodsp.h" yading@10: #include "mpegaudio.h" yading@10: yading@10: #include "qdm2data.h" yading@10: #include "qdm2_tablegen.h" yading@10: yading@10: #undef NDEBUG yading@10: #include yading@10: yading@10: yading@10: #define QDM2_LIST_ADD(list, size, packet) \ yading@10: do { \ yading@10: if (size > 0) { \ yading@10: list[size - 1].next = &list[size]; \ yading@10: } \ yading@10: list[size].packet = packet; \ yading@10: list[size].next = NULL; \ yading@10: size++; \ yading@10: } while(0) yading@10: yading@10: // Result is 8, 16 or 30 yading@10: #define QDM2_SB_USED(sub_sampling) (((sub_sampling) >= 2) ? 30 : 8 << (sub_sampling)) yading@10: yading@10: #define FIX_NOISE_IDX(noise_idx) \ yading@10: if ((noise_idx) >= 3840) \ yading@10: (noise_idx) -= 3840; \ yading@10: yading@10: #define SB_DITHERING_NOISE(sb,noise_idx) (noise_table[(noise_idx)++] * sb_noise_attenuation[(sb)]) yading@10: yading@10: #define SAMPLES_NEEDED \ yading@10: av_log (NULL,AV_LOG_INFO,"This file triggers some untested code. Please contact the developers.\n"); yading@10: yading@10: #define SAMPLES_NEEDED_2(why) \ yading@10: av_log (NULL,AV_LOG_INFO,"This file triggers some missing code. Please contact the developers.\nPosition: %s\n",why); yading@10: yading@10: #define QDM2_MAX_FRAME_SIZE 512 yading@10: yading@10: typedef int8_t sb_int8_array[2][30][64]; yading@10: yading@10: /** yading@10: * Subpacket yading@10: */ yading@10: typedef struct { yading@10: int type; ///< subpacket type yading@10: unsigned int size; ///< subpacket size yading@10: const uint8_t *data; ///< pointer to subpacket data (points to input data buffer, it's not a private copy) yading@10: } QDM2SubPacket; yading@10: yading@10: /** yading@10: * A node in the subpacket list yading@10: */ yading@10: typedef struct QDM2SubPNode { yading@10: QDM2SubPacket *packet; ///< packet yading@10: struct QDM2SubPNode *next; ///< pointer to next packet in the list, NULL if leaf node yading@10: } QDM2SubPNode; yading@10: yading@10: typedef struct { yading@10: float re; yading@10: float im; yading@10: } QDM2Complex; yading@10: yading@10: typedef struct { yading@10: float level; yading@10: QDM2Complex *complex; yading@10: const float *table; yading@10: int phase; yading@10: int phase_shift; yading@10: int duration; yading@10: short time_index; yading@10: short cutoff; yading@10: } FFTTone; yading@10: yading@10: typedef struct { yading@10: int16_t sub_packet; yading@10: uint8_t channel; yading@10: int16_t offset; yading@10: int16_t exp; yading@10: uint8_t phase; yading@10: } FFTCoefficient; yading@10: yading@10: typedef struct { yading@10: DECLARE_ALIGNED(32, QDM2Complex, complex)[MPA_MAX_CHANNELS][256]; yading@10: } QDM2FFT; yading@10: yading@10: /** yading@10: * QDM2 decoder context yading@10: */ yading@10: typedef struct { yading@10: /// Parameters from codec header, do not change during playback yading@10: int nb_channels; ///< number of channels yading@10: int channels; ///< number of channels yading@10: int group_size; ///< size of frame group (16 frames per group) yading@10: int fft_size; ///< size of FFT, in complex numbers yading@10: int checksum_size; ///< size of data block, used also for checksum yading@10: yading@10: /// Parameters built from header parameters, do not change during playback yading@10: int group_order; ///< order of frame group yading@10: int fft_order; ///< order of FFT (actually fftorder+1) yading@10: int frame_size; ///< size of data frame yading@10: int frequency_range; yading@10: int sub_sampling; ///< subsampling: 0=25%, 1=50%, 2=100% */ yading@10: int coeff_per_sb_select; ///< selector for "num. of coeffs. per subband" tables. Can be 0, 1, 2 yading@10: int cm_table_select; ///< selector for "coding method" tables. Can be 0, 1 (from init: 0-4) yading@10: yading@10: /// Packets and packet lists yading@10: QDM2SubPacket sub_packets[16]; ///< the packets themselves yading@10: QDM2SubPNode sub_packet_list_A[16]; ///< list of all packets yading@10: QDM2SubPNode sub_packet_list_B[16]; ///< FFT packets B are on list yading@10: int sub_packets_B; ///< number of packets on 'B' list yading@10: QDM2SubPNode sub_packet_list_C[16]; ///< packets with errors? yading@10: QDM2SubPNode sub_packet_list_D[16]; ///< DCT packets yading@10: yading@10: /// FFT and tones yading@10: FFTTone fft_tones[1000]; yading@10: int fft_tone_start; yading@10: int fft_tone_end; yading@10: FFTCoefficient fft_coefs[1000]; yading@10: int fft_coefs_index; yading@10: int fft_coefs_min_index[5]; yading@10: int fft_coefs_max_index[5]; yading@10: int fft_level_exp[6]; yading@10: RDFTContext rdft_ctx; yading@10: QDM2FFT fft; yading@10: yading@10: /// I/O data yading@10: const uint8_t *compressed_data; yading@10: int compressed_size; yading@10: float output_buffer[QDM2_MAX_FRAME_SIZE * MPA_MAX_CHANNELS * 2]; yading@10: yading@10: /// Synthesis filter yading@10: MPADSPContext mpadsp; yading@10: DECLARE_ALIGNED(32, float, synth_buf)[MPA_MAX_CHANNELS][512*2]; yading@10: int synth_buf_offset[MPA_MAX_CHANNELS]; yading@10: DECLARE_ALIGNED(32, float, sb_samples)[MPA_MAX_CHANNELS][128][SBLIMIT]; yading@10: DECLARE_ALIGNED(32, float, samples)[MPA_MAX_CHANNELS * MPA_FRAME_SIZE]; yading@10: yading@10: /// Mixed temporary data used in decoding yading@10: float tone_level[MPA_MAX_CHANNELS][30][64]; yading@10: int8_t coding_method[MPA_MAX_CHANNELS][30][64]; yading@10: int8_t quantized_coeffs[MPA_MAX_CHANNELS][10][8]; yading@10: int8_t tone_level_idx_base[MPA_MAX_CHANNELS][30][8]; yading@10: int8_t tone_level_idx_hi1[MPA_MAX_CHANNELS][3][8][8]; yading@10: int8_t tone_level_idx_mid[MPA_MAX_CHANNELS][26][8]; yading@10: int8_t tone_level_idx_hi2[MPA_MAX_CHANNELS][26]; yading@10: int8_t tone_level_idx[MPA_MAX_CHANNELS][30][64]; yading@10: int8_t tone_level_idx_temp[MPA_MAX_CHANNELS][30][64]; yading@10: yading@10: // Flags yading@10: int has_errors; ///< packet has errors yading@10: int superblocktype_2_3; ///< select fft tables and some algorithm based on superblock type yading@10: int do_synth_filter; ///< used to perform or skip synthesis filter yading@10: yading@10: int sub_packet; yading@10: int noise_idx; ///< index for dithering noise table yading@10: } QDM2Context; yading@10: yading@10: yading@10: static VLC vlc_tab_level; yading@10: static VLC vlc_tab_diff; yading@10: static VLC vlc_tab_run; yading@10: static VLC fft_level_exp_alt_vlc; yading@10: static VLC fft_level_exp_vlc; yading@10: static VLC fft_stereo_exp_vlc; yading@10: static VLC fft_stereo_phase_vlc; yading@10: static VLC vlc_tab_tone_level_idx_hi1; yading@10: static VLC vlc_tab_tone_level_idx_mid; yading@10: static VLC vlc_tab_tone_level_idx_hi2; yading@10: static VLC vlc_tab_type30; yading@10: static VLC vlc_tab_type34; yading@10: static VLC vlc_tab_fft_tone_offset[5]; yading@10: yading@10: static const uint16_t qdm2_vlc_offs[] = { yading@10: 0,260,566,598,894,1166,1230,1294,1678,1950,2214,2278,2310,2570,2834,3124,3448,3838, yading@10: }; yading@10: yading@10: static av_cold void qdm2_init_vlc(void) yading@10: { yading@10: static int vlcs_initialized = 0; yading@10: static VLC_TYPE qdm2_table[3838][2]; yading@10: yading@10: if (!vlcs_initialized) { yading@10: yading@10: vlc_tab_level.table = &qdm2_table[qdm2_vlc_offs[0]]; yading@10: vlc_tab_level.table_allocated = qdm2_vlc_offs[1] - qdm2_vlc_offs[0]; yading@10: init_vlc (&vlc_tab_level, 8, 24, yading@10: vlc_tab_level_huffbits, 1, 1, yading@10: vlc_tab_level_huffcodes, 2, 2, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE); yading@10: yading@10: vlc_tab_diff.table = &qdm2_table[qdm2_vlc_offs[1]]; yading@10: vlc_tab_diff.table_allocated = qdm2_vlc_offs[2] - qdm2_vlc_offs[1]; yading@10: init_vlc (&vlc_tab_diff, 8, 37, yading@10: vlc_tab_diff_huffbits, 1, 1, yading@10: vlc_tab_diff_huffcodes, 2, 2, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE); yading@10: yading@10: vlc_tab_run.table = &qdm2_table[qdm2_vlc_offs[2]]; yading@10: vlc_tab_run.table_allocated = qdm2_vlc_offs[3] - qdm2_vlc_offs[2]; yading@10: init_vlc (&vlc_tab_run, 5, 6, yading@10: vlc_tab_run_huffbits, 1, 1, yading@10: vlc_tab_run_huffcodes, 1, 1, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE); yading@10: yading@10: fft_level_exp_alt_vlc.table = &qdm2_table[qdm2_vlc_offs[3]]; yading@10: fft_level_exp_alt_vlc.table_allocated = qdm2_vlc_offs[4] - qdm2_vlc_offs[3]; yading@10: init_vlc (&fft_level_exp_alt_vlc, 8, 28, yading@10: fft_level_exp_alt_huffbits, 1, 1, yading@10: fft_level_exp_alt_huffcodes, 2, 2, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE); yading@10: yading@10: yading@10: fft_level_exp_vlc.table = &qdm2_table[qdm2_vlc_offs[4]]; yading@10: fft_level_exp_vlc.table_allocated = qdm2_vlc_offs[5] - qdm2_vlc_offs[4]; yading@10: init_vlc (&fft_level_exp_vlc, 8, 20, yading@10: fft_level_exp_huffbits, 1, 1, yading@10: fft_level_exp_huffcodes, 2, 2, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE); yading@10: yading@10: fft_stereo_exp_vlc.table = &qdm2_table[qdm2_vlc_offs[5]]; yading@10: fft_stereo_exp_vlc.table_allocated = qdm2_vlc_offs[6] - qdm2_vlc_offs[5]; yading@10: init_vlc (&fft_stereo_exp_vlc, 6, 7, yading@10: fft_stereo_exp_huffbits, 1, 1, yading@10: fft_stereo_exp_huffcodes, 1, 1, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE); yading@10: yading@10: fft_stereo_phase_vlc.table = &qdm2_table[qdm2_vlc_offs[6]]; yading@10: fft_stereo_phase_vlc.table_allocated = qdm2_vlc_offs[7] - qdm2_vlc_offs[6]; yading@10: init_vlc (&fft_stereo_phase_vlc, 6, 9, yading@10: fft_stereo_phase_huffbits, 1, 1, yading@10: fft_stereo_phase_huffcodes, 1, 1, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE); yading@10: yading@10: vlc_tab_tone_level_idx_hi1.table = &qdm2_table[qdm2_vlc_offs[7]]; yading@10: vlc_tab_tone_level_idx_hi1.table_allocated = qdm2_vlc_offs[8] - qdm2_vlc_offs[7]; yading@10: init_vlc (&vlc_tab_tone_level_idx_hi1, 8, 20, yading@10: vlc_tab_tone_level_idx_hi1_huffbits, 1, 1, yading@10: vlc_tab_tone_level_idx_hi1_huffcodes, 2, 2, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE); yading@10: yading@10: vlc_tab_tone_level_idx_mid.table = &qdm2_table[qdm2_vlc_offs[8]]; yading@10: vlc_tab_tone_level_idx_mid.table_allocated = qdm2_vlc_offs[9] - qdm2_vlc_offs[8]; yading@10: init_vlc (&vlc_tab_tone_level_idx_mid, 8, 24, yading@10: vlc_tab_tone_level_idx_mid_huffbits, 1, 1, yading@10: vlc_tab_tone_level_idx_mid_huffcodes, 2, 2, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE); yading@10: yading@10: vlc_tab_tone_level_idx_hi2.table = &qdm2_table[qdm2_vlc_offs[9]]; yading@10: vlc_tab_tone_level_idx_hi2.table_allocated = qdm2_vlc_offs[10] - qdm2_vlc_offs[9]; yading@10: init_vlc (&vlc_tab_tone_level_idx_hi2, 8, 24, yading@10: vlc_tab_tone_level_idx_hi2_huffbits, 1, 1, yading@10: vlc_tab_tone_level_idx_hi2_huffcodes, 2, 2, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE); yading@10: yading@10: vlc_tab_type30.table = &qdm2_table[qdm2_vlc_offs[10]]; yading@10: vlc_tab_type30.table_allocated = qdm2_vlc_offs[11] - qdm2_vlc_offs[10]; yading@10: init_vlc (&vlc_tab_type30, 6, 9, yading@10: vlc_tab_type30_huffbits, 1, 1, yading@10: vlc_tab_type30_huffcodes, 1, 1, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE); yading@10: yading@10: vlc_tab_type34.table = &qdm2_table[qdm2_vlc_offs[11]]; yading@10: vlc_tab_type34.table_allocated = qdm2_vlc_offs[12] - qdm2_vlc_offs[11]; yading@10: init_vlc (&vlc_tab_type34, 5, 10, yading@10: vlc_tab_type34_huffbits, 1, 1, yading@10: vlc_tab_type34_huffcodes, 1, 1, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE); yading@10: yading@10: vlc_tab_fft_tone_offset[0].table = &qdm2_table[qdm2_vlc_offs[12]]; yading@10: vlc_tab_fft_tone_offset[0].table_allocated = qdm2_vlc_offs[13] - qdm2_vlc_offs[12]; yading@10: init_vlc (&vlc_tab_fft_tone_offset[0], 8, 23, yading@10: vlc_tab_fft_tone_offset_0_huffbits, 1, 1, yading@10: vlc_tab_fft_tone_offset_0_huffcodes, 2, 2, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE); yading@10: yading@10: vlc_tab_fft_tone_offset[1].table = &qdm2_table[qdm2_vlc_offs[13]]; yading@10: vlc_tab_fft_tone_offset[1].table_allocated = qdm2_vlc_offs[14] - qdm2_vlc_offs[13]; yading@10: init_vlc (&vlc_tab_fft_tone_offset[1], 8, 28, yading@10: vlc_tab_fft_tone_offset_1_huffbits, 1, 1, yading@10: vlc_tab_fft_tone_offset_1_huffcodes, 2, 2, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE); yading@10: yading@10: vlc_tab_fft_tone_offset[2].table = &qdm2_table[qdm2_vlc_offs[14]]; yading@10: vlc_tab_fft_tone_offset[2].table_allocated = qdm2_vlc_offs[15] - qdm2_vlc_offs[14]; yading@10: init_vlc (&vlc_tab_fft_tone_offset[2], 8, 32, yading@10: vlc_tab_fft_tone_offset_2_huffbits, 1, 1, yading@10: vlc_tab_fft_tone_offset_2_huffcodes, 2, 2, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE); yading@10: yading@10: vlc_tab_fft_tone_offset[3].table = &qdm2_table[qdm2_vlc_offs[15]]; yading@10: vlc_tab_fft_tone_offset[3].table_allocated = qdm2_vlc_offs[16] - qdm2_vlc_offs[15]; yading@10: init_vlc (&vlc_tab_fft_tone_offset[3], 8, 35, yading@10: vlc_tab_fft_tone_offset_3_huffbits, 1, 1, yading@10: vlc_tab_fft_tone_offset_3_huffcodes, 2, 2, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE); yading@10: yading@10: vlc_tab_fft_tone_offset[4].table = &qdm2_table[qdm2_vlc_offs[16]]; yading@10: vlc_tab_fft_tone_offset[4].table_allocated = qdm2_vlc_offs[17] - qdm2_vlc_offs[16]; yading@10: init_vlc (&vlc_tab_fft_tone_offset[4], 8, 38, yading@10: vlc_tab_fft_tone_offset_4_huffbits, 1, 1, yading@10: vlc_tab_fft_tone_offset_4_huffcodes, 2, 2, INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE); yading@10: yading@10: vlcs_initialized=1; yading@10: } yading@10: } yading@10: yading@10: static int qdm2_get_vlc (GetBitContext *gb, VLC *vlc, int flag, int depth) yading@10: { yading@10: int value; yading@10: yading@10: value = get_vlc2(gb, vlc->table, vlc->bits, depth); yading@10: yading@10: /* stage-2, 3 bits exponent escape sequence */ yading@10: if (value-- == 0) yading@10: value = get_bits (gb, get_bits (gb, 3) + 1); yading@10: yading@10: /* stage-3, optional */ yading@10: if (flag) { yading@10: int tmp; yading@10: yading@10: if (value >= 60) { yading@10: av_log(NULL, AV_LOG_ERROR, "value %d in qdm2_get_vlc too large\n", value); yading@10: return 0; yading@10: } yading@10: yading@10: tmp= vlc_stage3_values[value]; yading@10: yading@10: if ((value & ~3) > 0) yading@10: tmp += get_bits (gb, (value >> 2)); yading@10: value = tmp; yading@10: } yading@10: yading@10: return value; yading@10: } yading@10: yading@10: yading@10: static int qdm2_get_se_vlc (VLC *vlc, GetBitContext *gb, int depth) yading@10: { yading@10: int value = qdm2_get_vlc (gb, vlc, 0, depth); yading@10: yading@10: return (value & 1) ? ((value + 1) >> 1) : -(value >> 1); yading@10: } yading@10: yading@10: yading@10: /** yading@10: * QDM2 checksum yading@10: * yading@10: * @param data pointer to data to be checksum'ed yading@10: * @param length data length yading@10: * @param value checksum value yading@10: * yading@10: * @return 0 if checksum is OK yading@10: */ yading@10: static uint16_t qdm2_packet_checksum (const uint8_t *data, int length, int value) { yading@10: int i; yading@10: yading@10: for (i=0; i < length; i++) yading@10: value -= data[i]; yading@10: yading@10: return (uint16_t)(value & 0xffff); yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Fill a QDM2SubPacket structure with packet type, size, and data pointer. yading@10: * yading@10: * @param gb bitreader context yading@10: * @param sub_packet packet under analysis yading@10: */ yading@10: static void qdm2_decode_sub_packet_header (GetBitContext *gb, QDM2SubPacket *sub_packet) yading@10: { yading@10: sub_packet->type = get_bits (gb, 8); yading@10: yading@10: if (sub_packet->type == 0) { yading@10: sub_packet->size = 0; yading@10: sub_packet->data = NULL; yading@10: } else { yading@10: sub_packet->size = get_bits (gb, 8); yading@10: yading@10: if (sub_packet->type & 0x80) { yading@10: sub_packet->size <<= 8; yading@10: sub_packet->size |= get_bits (gb, 8); yading@10: sub_packet->type &= 0x7f; yading@10: } yading@10: yading@10: if (sub_packet->type == 0x7f) yading@10: sub_packet->type |= (get_bits (gb, 8) << 8); yading@10: yading@10: sub_packet->data = &gb->buffer[get_bits_count(gb) / 8]; // FIXME: this depends on bitreader internal data yading@10: } yading@10: yading@10: av_log(NULL,AV_LOG_DEBUG,"Subpacket: type=%d size=%d start_offs=%x\n", yading@10: sub_packet->type, sub_packet->size, get_bits_count(gb) / 8); yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Return node pointer to first packet of requested type in list. yading@10: * yading@10: * @param list list of subpackets to be scanned yading@10: * @param type type of searched subpacket yading@10: * @return node pointer for subpacket if found, else NULL yading@10: */ yading@10: static QDM2SubPNode* qdm2_search_subpacket_type_in_list (QDM2SubPNode *list, int type) yading@10: { yading@10: while (list != NULL && list->packet != NULL) { yading@10: if (list->packet->type == type) yading@10: return list; yading@10: list = list->next; yading@10: } yading@10: return NULL; yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Replace 8 elements with their average value. yading@10: * Called by qdm2_decode_superblock before starting subblock decoding. yading@10: * yading@10: * @param q context yading@10: */ yading@10: static void average_quantized_coeffs (QDM2Context *q) yading@10: { yading@10: int i, j, n, ch, sum; yading@10: yading@10: n = coeff_per_sb_for_avg[q->coeff_per_sb_select][QDM2_SB_USED(q->sub_sampling) - 1] + 1; yading@10: yading@10: for (ch = 0; ch < q->nb_channels; ch++) yading@10: for (i = 0; i < n; i++) { yading@10: sum = 0; yading@10: yading@10: for (j = 0; j < 8; j++) yading@10: sum += q->quantized_coeffs[ch][i][j]; yading@10: yading@10: sum /= 8; yading@10: if (sum > 0) yading@10: sum--; yading@10: yading@10: for (j=0; j < 8; j++) yading@10: q->quantized_coeffs[ch][i][j] = sum; yading@10: } yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Build subband samples with noise weighted by q->tone_level. yading@10: * Called by synthfilt_build_sb_samples. yading@10: * yading@10: * @param q context yading@10: * @param sb subband index yading@10: */ yading@10: static void build_sb_samples_from_noise (QDM2Context *q, int sb) yading@10: { yading@10: int ch, j; yading@10: yading@10: FIX_NOISE_IDX(q->noise_idx); yading@10: yading@10: if (!q->nb_channels) yading@10: return; yading@10: yading@10: for (ch = 0; ch < q->nb_channels; ch++) yading@10: for (j = 0; j < 64; j++) { yading@10: q->sb_samples[ch][j * 2][sb] = SB_DITHERING_NOISE(sb,q->noise_idx) * q->tone_level[ch][sb][j]; yading@10: q->sb_samples[ch][j * 2 + 1][sb] = SB_DITHERING_NOISE(sb,q->noise_idx) * q->tone_level[ch][sb][j]; yading@10: } yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Called while processing data from subpackets 11 and 12. yading@10: * Used after making changes to coding_method array. yading@10: * yading@10: * @param sb subband index yading@10: * @param channels number of channels yading@10: * @param coding_method q->coding_method[0][0][0] yading@10: */ yading@10: static void fix_coding_method_array (int sb, int channels, sb_int8_array coding_method) yading@10: { yading@10: int j,k; yading@10: int ch; yading@10: int run, case_val; yading@10: static const int switchtable[23] = {0,5,1,5,5,5,5,5,2,5,5,5,5,5,5,5,3,5,5,5,5,5,4}; yading@10: yading@10: for (ch = 0; ch < channels; ch++) { yading@10: for (j = 0; j < 64; ) { yading@10: if((coding_method[ch][sb][j] - 8) > 22) { yading@10: run = 1; yading@10: case_val = 8; yading@10: } else { yading@10: switch (switchtable[coding_method[ch][sb][j]-8]) { yading@10: case 0: run = 10; case_val = 10; break; yading@10: case 1: run = 1; case_val = 16; break; yading@10: case 2: run = 5; case_val = 24; break; yading@10: case 3: run = 3; case_val = 30; break; yading@10: case 4: run = 1; case_val = 30; break; yading@10: case 5: run = 1; case_val = 8; break; yading@10: default: run = 1; case_val = 8; break; yading@10: } yading@10: } yading@10: for (k = 0; k < run; k++) yading@10: if (j + k < 128) yading@10: if (coding_method[ch][sb + (j + k) / 64][(j + k) % 64] > coding_method[ch][sb][j]) yading@10: if (k > 0) { yading@10: SAMPLES_NEEDED yading@10: //not debugged, almost never used yading@10: memset(&coding_method[ch][sb][j + k], case_val, k * sizeof(int8_t)); yading@10: memset(&coding_method[ch][sb][j + k], case_val, 3 * sizeof(int8_t)); yading@10: } yading@10: j += run; yading@10: } yading@10: } yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Related to synthesis filter yading@10: * Called by process_subpacket_10 yading@10: * yading@10: * @param q context yading@10: * @param flag 1 if called after getting data from subpacket 10, 0 if no subpacket 10 yading@10: */ yading@10: static void fill_tone_level_array (QDM2Context *q, int flag) yading@10: { yading@10: int i, sb, ch, sb_used; yading@10: int tmp, tab; yading@10: yading@10: for (ch = 0; ch < q->nb_channels; ch++) yading@10: for (sb = 0; sb < 30; sb++) yading@10: for (i = 0; i < 8; i++) { yading@10: if ((tab=coeff_per_sb_for_dequant[q->coeff_per_sb_select][sb]) < (last_coeff[q->coeff_per_sb_select] - 1)) yading@10: tmp = q->quantized_coeffs[ch][tab + 1][i] * dequant_table[q->coeff_per_sb_select][tab + 1][sb]+ yading@10: q->quantized_coeffs[ch][tab][i] * dequant_table[q->coeff_per_sb_select][tab][sb]; yading@10: else yading@10: tmp = q->quantized_coeffs[ch][tab][i] * dequant_table[q->coeff_per_sb_select][tab][sb]; yading@10: if(tmp < 0) yading@10: tmp += 0xff; yading@10: q->tone_level_idx_base[ch][sb][i] = (tmp / 256) & 0xff; yading@10: } yading@10: yading@10: sb_used = QDM2_SB_USED(q->sub_sampling); yading@10: yading@10: if ((q->superblocktype_2_3 != 0) && !flag) { yading@10: for (sb = 0; sb < sb_used; sb++) yading@10: for (ch = 0; ch < q->nb_channels; ch++) yading@10: for (i = 0; i < 64; i++) { yading@10: q->tone_level_idx[ch][sb][i] = q->tone_level_idx_base[ch][sb][i / 8]; yading@10: if (q->tone_level_idx[ch][sb][i] < 0) yading@10: q->tone_level[ch][sb][i] = 0; yading@10: else yading@10: q->tone_level[ch][sb][i] = fft_tone_level_table[0][q->tone_level_idx[ch][sb][i] & 0x3f]; yading@10: } yading@10: } else { yading@10: tab = q->superblocktype_2_3 ? 0 : 1; yading@10: for (sb = 0; sb < sb_used; sb++) { yading@10: if ((sb >= 4) && (sb <= 23)) { yading@10: for (ch = 0; ch < q->nb_channels; ch++) yading@10: for (i = 0; i < 64; i++) { yading@10: tmp = q->tone_level_idx_base[ch][sb][i / 8] - yading@10: q->tone_level_idx_hi1[ch][sb / 8][i / 8][i % 8] - yading@10: q->tone_level_idx_mid[ch][sb - 4][i / 8] - yading@10: q->tone_level_idx_hi2[ch][sb - 4]; yading@10: q->tone_level_idx[ch][sb][i] = tmp & 0xff; yading@10: if ((tmp < 0) || (!q->superblocktype_2_3 && !tmp)) yading@10: q->tone_level[ch][sb][i] = 0; yading@10: else yading@10: q->tone_level[ch][sb][i] = fft_tone_level_table[tab][tmp & 0x3f]; yading@10: } yading@10: } else { yading@10: if (sb > 4) { yading@10: for (ch = 0; ch < q->nb_channels; ch++) yading@10: for (i = 0; i < 64; i++) { yading@10: tmp = q->tone_level_idx_base[ch][sb][i / 8] - yading@10: q->tone_level_idx_hi1[ch][2][i / 8][i % 8] - yading@10: q->tone_level_idx_hi2[ch][sb - 4]; yading@10: q->tone_level_idx[ch][sb][i] = tmp & 0xff; yading@10: if ((tmp < 0) || (!q->superblocktype_2_3 && !tmp)) yading@10: q->tone_level[ch][sb][i] = 0; yading@10: else yading@10: q->tone_level[ch][sb][i] = fft_tone_level_table[tab][tmp & 0x3f]; yading@10: } yading@10: } else { yading@10: for (ch = 0; ch < q->nb_channels; ch++) yading@10: for (i = 0; i < 64; i++) { yading@10: tmp = q->tone_level_idx[ch][sb][i] = q->tone_level_idx_base[ch][sb][i / 8]; yading@10: if ((tmp < 0) || (!q->superblocktype_2_3 && !tmp)) yading@10: q->tone_level[ch][sb][i] = 0; yading@10: else yading@10: q->tone_level[ch][sb][i] = fft_tone_level_table[tab][tmp & 0x3f]; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: return; yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Related to synthesis filter yading@10: * Called by process_subpacket_11 yading@10: * c is built with data from subpacket 11 yading@10: * Most of this function is used only if superblock_type_2_3 == 0, never seen it in samples yading@10: * yading@10: * @param tone_level_idx yading@10: * @param tone_level_idx_temp yading@10: * @param coding_method q->coding_method[0][0][0] yading@10: * @param nb_channels number of channels yading@10: * @param c coming from subpacket 11, passed as 8*c yading@10: * @param superblocktype_2_3 flag based on superblock packet type yading@10: * @param cm_table_select q->cm_table_select yading@10: */ yading@10: static void fill_coding_method_array (sb_int8_array tone_level_idx, sb_int8_array tone_level_idx_temp, yading@10: sb_int8_array coding_method, int nb_channels, yading@10: int c, int superblocktype_2_3, int cm_table_select) yading@10: { yading@10: int ch, sb, j; yading@10: int tmp, acc, esp_40, comp; yading@10: int add1, add2, add3, add4; yading@10: int64_t multres; yading@10: yading@10: if (!superblocktype_2_3) { yading@10: /* This case is untested, no samples available */ yading@10: avpriv_request_sample(NULL, "!superblocktype_2_3"); yading@10: return; yading@10: for (ch = 0; ch < nb_channels; ch++) yading@10: for (sb = 0; sb < 30; sb++) { yading@10: for (j = 1; j < 63; j++) { // The loop only iterates to 63 so the code doesn't overflow the buffer yading@10: add1 = tone_level_idx[ch][sb][j] - 10; yading@10: if (add1 < 0) yading@10: add1 = 0; yading@10: add2 = add3 = add4 = 0; yading@10: if (sb > 1) { yading@10: add2 = tone_level_idx[ch][sb - 2][j] + tone_level_idx_offset_table[sb][0] - 6; yading@10: if (add2 < 0) yading@10: add2 = 0; yading@10: } yading@10: if (sb > 0) { yading@10: add3 = tone_level_idx[ch][sb - 1][j] + tone_level_idx_offset_table[sb][1] - 6; yading@10: if (add3 < 0) yading@10: add3 = 0; yading@10: } yading@10: if (sb < 29) { yading@10: add4 = tone_level_idx[ch][sb + 1][j] + tone_level_idx_offset_table[sb][3] - 6; yading@10: if (add4 < 0) yading@10: add4 = 0; yading@10: } yading@10: tmp = tone_level_idx[ch][sb][j + 1] * 2 - add4 - add3 - add2 - add1; yading@10: if (tmp < 0) yading@10: tmp = 0; yading@10: tone_level_idx_temp[ch][sb][j + 1] = tmp & 0xff; yading@10: } yading@10: tone_level_idx_temp[ch][sb][0] = tone_level_idx_temp[ch][sb][1]; yading@10: } yading@10: acc = 0; yading@10: for (ch = 0; ch < nb_channels; ch++) yading@10: for (sb = 0; sb < 30; sb++) yading@10: for (j = 0; j < 64; j++) yading@10: acc += tone_level_idx_temp[ch][sb][j]; yading@10: yading@10: multres = 0x66666667LL * (acc * 10); yading@10: esp_40 = (multres >> 32) / 8 + ((multres & 0xffffffff) >> 31); yading@10: for (ch = 0; ch < nb_channels; ch++) yading@10: for (sb = 0; sb < 30; sb++) yading@10: for (j = 0; j < 64; j++) { yading@10: comp = tone_level_idx_temp[ch][sb][j]* esp_40 * 10; yading@10: if (comp < 0) yading@10: comp += 0xff; yading@10: comp /= 256; // signed shift yading@10: switch(sb) { yading@10: case 0: yading@10: if (comp < 30) yading@10: comp = 30; yading@10: comp += 15; yading@10: break; yading@10: case 1: yading@10: if (comp < 24) yading@10: comp = 24; yading@10: comp += 10; yading@10: break; yading@10: case 2: yading@10: case 3: yading@10: case 4: yading@10: if (comp < 16) yading@10: comp = 16; yading@10: } yading@10: if (comp <= 5) yading@10: tmp = 0; yading@10: else if (comp <= 10) yading@10: tmp = 10; yading@10: else if (comp <= 16) yading@10: tmp = 16; yading@10: else if (comp <= 24) yading@10: tmp = -1; yading@10: else yading@10: tmp = 0; yading@10: coding_method[ch][sb][j] = ((tmp & 0xfffa) + 30 )& 0xff; yading@10: } yading@10: for (sb = 0; sb < 30; sb++) yading@10: fix_coding_method_array(sb, nb_channels, coding_method); yading@10: for (ch = 0; ch < nb_channels; ch++) yading@10: for (sb = 0; sb < 30; sb++) yading@10: for (j = 0; j < 64; j++) yading@10: if (sb >= 10) { yading@10: if (coding_method[ch][sb][j] < 10) yading@10: coding_method[ch][sb][j] = 10; yading@10: } else { yading@10: if (sb >= 2) { yading@10: if (coding_method[ch][sb][j] < 16) yading@10: coding_method[ch][sb][j] = 16; yading@10: } else { yading@10: if (coding_method[ch][sb][j] < 30) yading@10: coding_method[ch][sb][j] = 30; yading@10: } yading@10: } yading@10: } else { // superblocktype_2_3 != 0 yading@10: for (ch = 0; ch < nb_channels; ch++) yading@10: for (sb = 0; sb < 30; sb++) yading@10: for (j = 0; j < 64; j++) yading@10: coding_method[ch][sb][j] = coding_method_table[cm_table_select][sb]; yading@10: } yading@10: yading@10: return; yading@10: } yading@10: yading@10: yading@10: /** yading@10: * yading@10: * Called by process_subpacket_11 to process more data from subpacket 11 with sb 0-8 yading@10: * Called by process_subpacket_12 to process data from subpacket 12 with sb 8-sb_used yading@10: * yading@10: * @param q context yading@10: * @param gb bitreader context yading@10: * @param length packet length in bits yading@10: * @param sb_min lower subband processed (sb_min included) yading@10: * @param sb_max higher subband processed (sb_max excluded) yading@10: */ yading@10: static int synthfilt_build_sb_samples (QDM2Context *q, GetBitContext *gb, int length, int sb_min, int sb_max) yading@10: { yading@10: int sb, j, k, n, ch, run, channels; yading@10: int joined_stereo, zero_encoding, chs; yading@10: int type34_first; yading@10: float type34_div = 0; yading@10: float type34_predictor; yading@10: float samples[10], sign_bits[16]; yading@10: yading@10: if (length == 0) { yading@10: // If no data use noise yading@10: for (sb=sb_min; sb < sb_max; sb++) yading@10: build_sb_samples_from_noise (q, sb); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: for (sb = sb_min; sb < sb_max; sb++) { yading@10: FIX_NOISE_IDX(q->noise_idx); yading@10: yading@10: channels = q->nb_channels; yading@10: yading@10: if (q->nb_channels <= 1 || sb < 12) yading@10: joined_stereo = 0; yading@10: else if (sb >= 24) yading@10: joined_stereo = 1; yading@10: else yading@10: joined_stereo = (get_bits_left(gb) >= 1) ? get_bits1 (gb) : 0; yading@10: yading@10: if (joined_stereo) { yading@10: if (get_bits_left(gb) >= 16) yading@10: for (j = 0; j < 16; j++) yading@10: sign_bits[j] = get_bits1 (gb); yading@10: yading@10: if (q->coding_method[0][sb][0] <= 0) { yading@10: av_log(NULL, AV_LOG_ERROR, "coding method invalid\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: for (j = 0; j < 64; j++) yading@10: if (q->coding_method[1][sb][j] > q->coding_method[0][sb][j]) yading@10: q->coding_method[0][sb][j] = q->coding_method[1][sb][j]; yading@10: yading@10: fix_coding_method_array(sb, q->nb_channels, q->coding_method); yading@10: channels = 1; yading@10: } yading@10: yading@10: for (ch = 0; ch < channels; ch++) { yading@10: zero_encoding = (get_bits_left(gb) >= 1) ? get_bits1(gb) : 0; yading@10: type34_predictor = 0.0; yading@10: type34_first = 1; yading@10: yading@10: for (j = 0; j < 128; ) { yading@10: switch (q->coding_method[ch][sb][j / 2]) { yading@10: case 8: yading@10: if (get_bits_left(gb) >= 10) { yading@10: if (zero_encoding) { yading@10: for (k = 0; k < 5; k++) { yading@10: if ((j + 2 * k) >= 128) yading@10: break; yading@10: samples[2 * k] = get_bits1(gb) ? dequant_1bit[joined_stereo][2 * get_bits1(gb)] : 0; yading@10: } yading@10: } else { yading@10: n = get_bits(gb, 8); yading@10: if (n >= 243) { yading@10: av_log(NULL, AV_LOG_ERROR, "Invalid 8bit codeword\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: for (k = 0; k < 5; k++) yading@10: samples[2 * k] = dequant_1bit[joined_stereo][random_dequant_index[n][k]]; yading@10: } yading@10: for (k = 0; k < 5; k++) yading@10: samples[2 * k + 1] = SB_DITHERING_NOISE(sb,q->noise_idx); yading@10: } else { yading@10: for (k = 0; k < 10; k++) yading@10: samples[k] = SB_DITHERING_NOISE(sb,q->noise_idx); yading@10: } yading@10: run = 10; yading@10: break; yading@10: yading@10: case 10: yading@10: if (get_bits_left(gb) >= 1) { yading@10: float f = 0.81; yading@10: yading@10: if (get_bits1(gb)) yading@10: f = -f; yading@10: f -= noise_samples[((sb + 1) * (j +5 * ch + 1)) & 127] * 9.0 / 40.0; yading@10: samples[0] = f; yading@10: } else { yading@10: samples[0] = SB_DITHERING_NOISE(sb,q->noise_idx); yading@10: } yading@10: run = 1; yading@10: break; yading@10: yading@10: case 16: yading@10: if (get_bits_left(gb) >= 10) { yading@10: if (zero_encoding) { yading@10: for (k = 0; k < 5; k++) { yading@10: if ((j + k) >= 128) yading@10: break; yading@10: samples[k] = (get_bits1(gb) == 0) ? 0 : dequant_1bit[joined_stereo][2 * get_bits1(gb)]; yading@10: } yading@10: } else { yading@10: n = get_bits (gb, 8); yading@10: if (n >= 243) { yading@10: av_log(NULL, AV_LOG_ERROR, "Invalid 8bit codeword\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: for (k = 0; k < 5; k++) yading@10: samples[k] = dequant_1bit[joined_stereo][random_dequant_index[n][k]]; yading@10: } yading@10: } else { yading@10: for (k = 0; k < 5; k++) yading@10: samples[k] = SB_DITHERING_NOISE(sb,q->noise_idx); yading@10: } yading@10: run = 5; yading@10: break; yading@10: yading@10: case 24: yading@10: if (get_bits_left(gb) >= 7) { yading@10: n = get_bits(gb, 7); yading@10: if (n >= 125) { yading@10: av_log(NULL, AV_LOG_ERROR, "Invalid 7bit codeword\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: for (k = 0; k < 3; k++) yading@10: samples[k] = (random_dequant_type24[n][k] - 2.0) * 0.5; yading@10: } else { yading@10: for (k = 0; k < 3; k++) yading@10: samples[k] = SB_DITHERING_NOISE(sb,q->noise_idx); yading@10: } yading@10: run = 3; yading@10: break; yading@10: yading@10: case 30: yading@10: if (get_bits_left(gb) >= 4) { yading@10: unsigned index = qdm2_get_vlc(gb, &vlc_tab_type30, 0, 1); yading@10: if (index >= FF_ARRAY_ELEMS(type30_dequant)) { yading@10: av_log(NULL, AV_LOG_ERROR, "index %d out of type30_dequant array\n", index); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: samples[0] = type30_dequant[index]; yading@10: } else yading@10: samples[0] = SB_DITHERING_NOISE(sb,q->noise_idx); yading@10: yading@10: run = 1; yading@10: break; yading@10: yading@10: case 34: yading@10: if (get_bits_left(gb) >= 7) { yading@10: if (type34_first) { yading@10: type34_div = (float)(1 << get_bits(gb, 2)); yading@10: samples[0] = ((float)get_bits(gb, 5) - 16.0) / 15.0; yading@10: type34_predictor = samples[0]; yading@10: type34_first = 0; yading@10: } else { yading@10: unsigned index = qdm2_get_vlc(gb, &vlc_tab_type34, 0, 1); yading@10: if (index >= FF_ARRAY_ELEMS(type34_delta)) { yading@10: av_log(NULL, AV_LOG_ERROR, "index %d out of type34_delta array\n", index); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: samples[0] = type34_delta[index] / type34_div + type34_predictor; yading@10: type34_predictor = samples[0]; yading@10: } yading@10: } else { yading@10: samples[0] = SB_DITHERING_NOISE(sb,q->noise_idx); yading@10: } yading@10: run = 1; yading@10: break; yading@10: yading@10: default: yading@10: samples[0] = SB_DITHERING_NOISE(sb,q->noise_idx); yading@10: run = 1; yading@10: break; yading@10: } yading@10: yading@10: if (joined_stereo) { yading@10: float tmp[10][MPA_MAX_CHANNELS]; yading@10: for (k = 0; k < run; k++) { yading@10: tmp[k][0] = samples[k]; yading@10: if ((j + k) < 128) yading@10: tmp[k][1] = (sign_bits[(j + k) / 8]) ? -samples[k] : samples[k]; yading@10: } yading@10: for (chs = 0; chs < q->nb_channels; chs++) yading@10: for (k = 0; k < run; k++) yading@10: if ((j + k) < 128) yading@10: q->sb_samples[chs][j + k][sb] = q->tone_level[chs][sb][((j + k)/2)] * tmp[k][chs]; yading@10: } else { yading@10: for (k = 0; k < run; k++) yading@10: if ((j + k) < 128) yading@10: q->sb_samples[ch][j + k][sb] = q->tone_level[ch][sb][(j + k)/2] * samples[k]; yading@10: } yading@10: yading@10: j += run; yading@10: } // j loop yading@10: } // channel loop yading@10: } // subband loop yading@10: return 0; yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Init the first element of a channel in quantized_coeffs with data from packet 10 (quantized_coeffs[ch][0]). yading@10: * This is similar to process_subpacket_9, but for a single channel and for element [0] yading@10: * same VLC tables as process_subpacket_9 are used. yading@10: * yading@10: * @param quantized_coeffs pointer to quantized_coeffs[ch][0] yading@10: * @param gb bitreader context yading@10: */ yading@10: static int init_quantized_coeffs_elem0 (int8_t *quantized_coeffs, GetBitContext *gb) yading@10: { yading@10: int i, k, run, level, diff; yading@10: yading@10: if (get_bits_left(gb) < 16) yading@10: return -1; yading@10: level = qdm2_get_vlc(gb, &vlc_tab_level, 0, 2); yading@10: yading@10: quantized_coeffs[0] = level; yading@10: yading@10: for (i = 0; i < 7; ) { yading@10: if (get_bits_left(gb) < 16) yading@10: return -1; yading@10: run = qdm2_get_vlc(gb, &vlc_tab_run, 0, 1) + 1; yading@10: yading@10: if (i + run >= 8) yading@10: return -1; yading@10: yading@10: if (get_bits_left(gb) < 16) yading@10: return -1; yading@10: diff = qdm2_get_se_vlc(&vlc_tab_diff, gb, 2); yading@10: yading@10: for (k = 1; k <= run; k++) yading@10: quantized_coeffs[i + k] = (level + ((k * diff) / run)); yading@10: yading@10: level += diff; yading@10: i += run; yading@10: } yading@10: return 0; yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Related to synthesis filter, process data from packet 10 yading@10: * Init part of quantized_coeffs via function init_quantized_coeffs_elem0 yading@10: * Init tone_level_idx_hi1, tone_level_idx_hi2, tone_level_idx_mid with data from packet 10 yading@10: * yading@10: * @param q context yading@10: * @param gb bitreader context yading@10: */ yading@10: static void init_tone_level_dequantization (QDM2Context *q, GetBitContext *gb) yading@10: { yading@10: int sb, j, k, n, ch; yading@10: yading@10: for (ch = 0; ch < q->nb_channels; ch++) { yading@10: init_quantized_coeffs_elem0(q->quantized_coeffs[ch][0], gb); yading@10: yading@10: if (get_bits_left(gb) < 16) { yading@10: memset(q->quantized_coeffs[ch][0], 0, 8); yading@10: break; yading@10: } yading@10: } yading@10: yading@10: n = q->sub_sampling + 1; yading@10: yading@10: for (sb = 0; sb < n; sb++) yading@10: for (ch = 0; ch < q->nb_channels; ch++) yading@10: for (j = 0; j < 8; j++) { yading@10: if (get_bits_left(gb) < 1) yading@10: break; yading@10: if (get_bits1(gb)) { yading@10: for (k=0; k < 8; k++) { yading@10: if (get_bits_left(gb) < 16) yading@10: break; yading@10: q->tone_level_idx_hi1[ch][sb][j][k] = qdm2_get_vlc(gb, &vlc_tab_tone_level_idx_hi1, 0, 2); yading@10: } yading@10: } else { yading@10: for (k=0; k < 8; k++) yading@10: q->tone_level_idx_hi1[ch][sb][j][k] = 0; yading@10: } yading@10: } yading@10: yading@10: n = QDM2_SB_USED(q->sub_sampling) - 4; yading@10: yading@10: for (sb = 0; sb < n; sb++) yading@10: for (ch = 0; ch < q->nb_channels; ch++) { yading@10: if (get_bits_left(gb) < 16) yading@10: break; yading@10: q->tone_level_idx_hi2[ch][sb] = qdm2_get_vlc(gb, &vlc_tab_tone_level_idx_hi2, 0, 2); yading@10: if (sb > 19) yading@10: q->tone_level_idx_hi2[ch][sb] -= 16; yading@10: else yading@10: for (j = 0; j < 8; j++) yading@10: q->tone_level_idx_mid[ch][sb][j] = -16; yading@10: } yading@10: yading@10: n = QDM2_SB_USED(q->sub_sampling) - 5; yading@10: yading@10: for (sb = 0; sb < n; sb++) yading@10: for (ch = 0; ch < q->nb_channels; ch++) yading@10: for (j = 0; j < 8; j++) { yading@10: if (get_bits_left(gb) < 16) yading@10: break; yading@10: q->tone_level_idx_mid[ch][sb][j] = qdm2_get_vlc(gb, &vlc_tab_tone_level_idx_mid, 0, 2) - 32; yading@10: } yading@10: } yading@10: yading@10: /** yading@10: * Process subpacket 9, init quantized_coeffs with data from it yading@10: * yading@10: * @param q context yading@10: * @param node pointer to node with packet yading@10: */ yading@10: static int process_subpacket_9 (QDM2Context *q, QDM2SubPNode *node) yading@10: { yading@10: GetBitContext gb; yading@10: int i, j, k, n, ch, run, level, diff; yading@10: yading@10: init_get_bits(&gb, node->packet->data, node->packet->size*8); yading@10: yading@10: n = coeff_per_sb_for_avg[q->coeff_per_sb_select][QDM2_SB_USED(q->sub_sampling) - 1] + 1; // same as averagesomething function yading@10: yading@10: for (i = 1; i < n; i++) yading@10: for (ch=0; ch < q->nb_channels; ch++) { yading@10: level = qdm2_get_vlc(&gb, &vlc_tab_level, 0, 2); yading@10: q->quantized_coeffs[ch][i][0] = level; yading@10: yading@10: for (j = 0; j < (8 - 1); ) { yading@10: run = qdm2_get_vlc(&gb, &vlc_tab_run, 0, 1) + 1; yading@10: diff = qdm2_get_se_vlc(&vlc_tab_diff, &gb, 2); yading@10: yading@10: if (j + run >= 8) yading@10: return -1; yading@10: yading@10: for (k = 1; k <= run; k++) yading@10: q->quantized_coeffs[ch][i][j + k] = (level + ((k*diff) / run)); yading@10: yading@10: level += diff; yading@10: j += run; yading@10: } yading@10: } yading@10: yading@10: for (ch = 0; ch < q->nb_channels; ch++) yading@10: for (i = 0; i < 8; i++) yading@10: q->quantized_coeffs[ch][0][i] = 0; yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Process subpacket 10 if not null, else yading@10: * yading@10: * @param q context yading@10: * @param node pointer to node with packet yading@10: */ yading@10: static void process_subpacket_10 (QDM2Context *q, QDM2SubPNode *node) yading@10: { yading@10: GetBitContext gb; yading@10: yading@10: if (node) { yading@10: init_get_bits(&gb, node->packet->data, node->packet->size * 8); yading@10: init_tone_level_dequantization(q, &gb); yading@10: fill_tone_level_array(q, 1); yading@10: } else { yading@10: fill_tone_level_array(q, 0); yading@10: } yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Process subpacket 11 yading@10: * yading@10: * @param q context yading@10: * @param node pointer to node with packet yading@10: */ yading@10: static void process_subpacket_11 (QDM2Context *q, QDM2SubPNode *node) yading@10: { yading@10: GetBitContext gb; yading@10: int length = 0; yading@10: yading@10: if (node) { yading@10: length = node->packet->size * 8; yading@10: init_get_bits(&gb, node->packet->data, length); yading@10: } yading@10: yading@10: if (length >= 32) { yading@10: int c = get_bits (&gb, 13); yading@10: yading@10: if (c > 3) yading@10: fill_coding_method_array (q->tone_level_idx, q->tone_level_idx_temp, q->coding_method, yading@10: q->nb_channels, 8*c, q->superblocktype_2_3, q->cm_table_select); yading@10: } yading@10: yading@10: synthfilt_build_sb_samples(q, &gb, length, 0, 8); yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Process subpacket 12 yading@10: * yading@10: * @param q context yading@10: * @param node pointer to node with packet yading@10: */ yading@10: static void process_subpacket_12 (QDM2Context *q, QDM2SubPNode *node) yading@10: { yading@10: GetBitContext gb; yading@10: int length = 0; yading@10: yading@10: if (node) { yading@10: length = node->packet->size * 8; yading@10: init_get_bits(&gb, node->packet->data, length); yading@10: } yading@10: yading@10: synthfilt_build_sb_samples(q, &gb, length, 8, QDM2_SB_USED(q->sub_sampling)); yading@10: } yading@10: yading@10: /** yading@10: * Process new subpackets for synthesis filter yading@10: * yading@10: * @param q context yading@10: * @param list list with synthesis filter packets (list D) yading@10: */ yading@10: static void process_synthesis_subpackets (QDM2Context *q, QDM2SubPNode *list) yading@10: { yading@10: QDM2SubPNode *nodes[4]; yading@10: yading@10: nodes[0] = qdm2_search_subpacket_type_in_list(list, 9); yading@10: if (nodes[0] != NULL) yading@10: process_subpacket_9(q, nodes[0]); yading@10: yading@10: nodes[1] = qdm2_search_subpacket_type_in_list(list, 10); yading@10: if (nodes[1] != NULL) yading@10: process_subpacket_10(q, nodes[1]); yading@10: else yading@10: process_subpacket_10(q, NULL); yading@10: yading@10: nodes[2] = qdm2_search_subpacket_type_in_list(list, 11); yading@10: if (nodes[0] != NULL && nodes[1] != NULL && nodes[2] != NULL) yading@10: process_subpacket_11(q, nodes[2]); yading@10: else yading@10: process_subpacket_11(q, NULL); yading@10: yading@10: nodes[3] = qdm2_search_subpacket_type_in_list(list, 12); yading@10: if (nodes[0] != NULL && nodes[1] != NULL && nodes[3] != NULL) yading@10: process_subpacket_12(q, nodes[3]); yading@10: else yading@10: process_subpacket_12(q, NULL); yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Decode superblock, fill packet lists. yading@10: * yading@10: * @param q context yading@10: */ yading@10: static void qdm2_decode_super_block (QDM2Context *q) yading@10: { yading@10: GetBitContext gb; yading@10: QDM2SubPacket header, *packet; yading@10: int i, packet_bytes, sub_packet_size, sub_packets_D; yading@10: unsigned int next_index = 0; yading@10: yading@10: memset(q->tone_level_idx_hi1, 0, sizeof(q->tone_level_idx_hi1)); yading@10: memset(q->tone_level_idx_mid, 0, sizeof(q->tone_level_idx_mid)); yading@10: memset(q->tone_level_idx_hi2, 0, sizeof(q->tone_level_idx_hi2)); yading@10: yading@10: q->sub_packets_B = 0; yading@10: sub_packets_D = 0; yading@10: yading@10: average_quantized_coeffs(q); // average elements in quantized_coeffs[max_ch][10][8] yading@10: yading@10: init_get_bits(&gb, q->compressed_data, q->compressed_size*8); yading@10: qdm2_decode_sub_packet_header(&gb, &header); yading@10: yading@10: if (header.type < 2 || header.type >= 8) { yading@10: q->has_errors = 1; yading@10: av_log(NULL,AV_LOG_ERROR,"bad superblock type\n"); yading@10: return; yading@10: } yading@10: yading@10: q->superblocktype_2_3 = (header.type == 2 || header.type == 3); yading@10: packet_bytes = (q->compressed_size - get_bits_count(&gb) / 8); yading@10: yading@10: init_get_bits(&gb, header.data, header.size*8); yading@10: yading@10: if (header.type == 2 || header.type == 4 || header.type == 5) { yading@10: int csum = 257 * get_bits(&gb, 8); yading@10: csum += 2 * get_bits(&gb, 8); yading@10: yading@10: csum = qdm2_packet_checksum(q->compressed_data, q->checksum_size, csum); yading@10: yading@10: if (csum != 0) { yading@10: q->has_errors = 1; yading@10: av_log(NULL,AV_LOG_ERROR,"bad packet checksum\n"); yading@10: return; yading@10: } yading@10: } yading@10: yading@10: q->sub_packet_list_B[0].packet = NULL; yading@10: q->sub_packet_list_D[0].packet = NULL; yading@10: yading@10: for (i = 0; i < 6; i++) yading@10: if (--q->fft_level_exp[i] < 0) yading@10: q->fft_level_exp[i] = 0; yading@10: yading@10: for (i = 0; packet_bytes > 0; i++) { yading@10: int j; yading@10: yading@10: if (i >= FF_ARRAY_ELEMS(q->sub_packet_list_A)) { yading@10: SAMPLES_NEEDED_2("too many packet bytes"); yading@10: return; yading@10: } yading@10: yading@10: q->sub_packet_list_A[i].next = NULL; yading@10: yading@10: if (i > 0) { yading@10: q->sub_packet_list_A[i - 1].next = &q->sub_packet_list_A[i]; yading@10: yading@10: /* seek to next block */ yading@10: init_get_bits(&gb, header.data, header.size*8); yading@10: skip_bits(&gb, next_index*8); yading@10: yading@10: if (next_index >= header.size) yading@10: break; yading@10: } yading@10: yading@10: /* decode subpacket */ yading@10: packet = &q->sub_packets[i]; yading@10: qdm2_decode_sub_packet_header(&gb, packet); yading@10: next_index = packet->size + get_bits_count(&gb) / 8; yading@10: sub_packet_size = ((packet->size > 0xff) ? 1 : 0) + packet->size + 2; yading@10: yading@10: if (packet->type == 0) yading@10: break; yading@10: yading@10: if (sub_packet_size > packet_bytes) { yading@10: if (packet->type != 10 && packet->type != 11 && packet->type != 12) yading@10: break; yading@10: packet->size += packet_bytes - sub_packet_size; yading@10: } yading@10: yading@10: packet_bytes -= sub_packet_size; yading@10: yading@10: /* add subpacket to 'all subpackets' list */ yading@10: q->sub_packet_list_A[i].packet = packet; yading@10: yading@10: /* add subpacket to related list */ yading@10: if (packet->type == 8) { yading@10: SAMPLES_NEEDED_2("packet type 8"); yading@10: return; yading@10: } else if (packet->type >= 9 && packet->type <= 12) { yading@10: /* packets for MPEG Audio like Synthesis Filter */ yading@10: QDM2_LIST_ADD(q->sub_packet_list_D, sub_packets_D, packet); yading@10: } else if (packet->type == 13) { yading@10: for (j = 0; j < 6; j++) yading@10: q->fft_level_exp[j] = get_bits(&gb, 6); yading@10: } else if (packet->type == 14) { yading@10: for (j = 0; j < 6; j++) yading@10: q->fft_level_exp[j] = qdm2_get_vlc(&gb, &fft_level_exp_vlc, 0, 2); yading@10: } else if (packet->type == 15) { yading@10: SAMPLES_NEEDED_2("packet type 15") yading@10: return; yading@10: } else if (packet->type >= 16 && packet->type < 48 && !fft_subpackets[packet->type - 16]) { yading@10: /* packets for FFT */ yading@10: QDM2_LIST_ADD(q->sub_packet_list_B, q->sub_packets_B, packet); yading@10: } yading@10: } // Packet bytes loop yading@10: yading@10: /* **************************************************************** */ yading@10: if (q->sub_packet_list_D[0].packet != NULL) { yading@10: process_synthesis_subpackets(q, q->sub_packet_list_D); yading@10: q->do_synth_filter = 1; yading@10: } else if (q->do_synth_filter) { yading@10: process_subpacket_10(q, NULL); yading@10: process_subpacket_11(q, NULL); yading@10: process_subpacket_12(q, NULL); yading@10: } yading@10: /* **************************************************************** */ yading@10: } yading@10: yading@10: yading@10: static void qdm2_fft_init_coefficient (QDM2Context *q, int sub_packet, yading@10: int offset, int duration, int channel, yading@10: int exp, int phase) yading@10: { yading@10: if (q->fft_coefs_min_index[duration] < 0) yading@10: q->fft_coefs_min_index[duration] = q->fft_coefs_index; yading@10: yading@10: q->fft_coefs[q->fft_coefs_index].sub_packet = ((sub_packet >= 16) ? (sub_packet - 16) : sub_packet); yading@10: q->fft_coefs[q->fft_coefs_index].channel = channel; yading@10: q->fft_coefs[q->fft_coefs_index].offset = offset; yading@10: q->fft_coefs[q->fft_coefs_index].exp = exp; yading@10: q->fft_coefs[q->fft_coefs_index].phase = phase; yading@10: q->fft_coefs_index++; yading@10: } yading@10: yading@10: yading@10: static void qdm2_fft_decode_tones (QDM2Context *q, int duration, GetBitContext *gb, int b) yading@10: { yading@10: int channel, stereo, phase, exp; yading@10: int local_int_4, local_int_8, stereo_phase, local_int_10; yading@10: int local_int_14, stereo_exp, local_int_20, local_int_28; yading@10: int n, offset; yading@10: yading@10: local_int_4 = 0; yading@10: local_int_28 = 0; yading@10: local_int_20 = 2; yading@10: local_int_8 = (4 - duration); yading@10: local_int_10 = 1 << (q->group_order - duration - 1); yading@10: offset = 1; yading@10: yading@10: while (get_bits_left(gb)>0) { yading@10: if (q->superblocktype_2_3) { yading@10: while ((n = qdm2_get_vlc(gb, &vlc_tab_fft_tone_offset[local_int_8], 1, 2)) < 2) { yading@10: if (get_bits_left(gb)<0) { yading@10: if(local_int_4 < q->group_size) yading@10: av_log(NULL, AV_LOG_ERROR, "overread in qdm2_fft_decode_tones()\n"); yading@10: return; yading@10: } yading@10: offset = 1; yading@10: if (n == 0) { yading@10: local_int_4 += local_int_10; yading@10: local_int_28 += (1 << local_int_8); yading@10: } else { yading@10: local_int_4 += 8*local_int_10; yading@10: local_int_28 += (8 << local_int_8); yading@10: } yading@10: } yading@10: offset += (n - 2); yading@10: } else { yading@10: offset += qdm2_get_vlc(gb, &vlc_tab_fft_tone_offset[local_int_8], 1, 2); yading@10: while (offset >= (local_int_10 - 1)) { yading@10: offset += (1 - (local_int_10 - 1)); yading@10: local_int_4 += local_int_10; yading@10: local_int_28 += (1 << local_int_8); yading@10: } yading@10: } yading@10: yading@10: if (local_int_4 >= q->group_size) yading@10: return; yading@10: yading@10: local_int_14 = (offset >> local_int_8); yading@10: if (local_int_14 >= FF_ARRAY_ELEMS(fft_level_index_table)) yading@10: return; yading@10: yading@10: if (q->nb_channels > 1) { yading@10: channel = get_bits1(gb); yading@10: stereo = get_bits1(gb); yading@10: } else { yading@10: channel = 0; yading@10: stereo = 0; yading@10: } yading@10: yading@10: exp = qdm2_get_vlc(gb, (b ? &fft_level_exp_vlc : &fft_level_exp_alt_vlc), 0, 2); yading@10: exp += q->fft_level_exp[fft_level_index_table[local_int_14]]; yading@10: exp = (exp < 0) ? 0 : exp; yading@10: yading@10: phase = get_bits(gb, 3); yading@10: stereo_exp = 0; yading@10: stereo_phase = 0; yading@10: yading@10: if (stereo) { yading@10: stereo_exp = (exp - qdm2_get_vlc(gb, &fft_stereo_exp_vlc, 0, 1)); yading@10: stereo_phase = (phase - qdm2_get_vlc(gb, &fft_stereo_phase_vlc, 0, 1)); yading@10: if (stereo_phase < 0) yading@10: stereo_phase += 8; yading@10: } yading@10: yading@10: if (q->frequency_range > (local_int_14 + 1)) { yading@10: int sub_packet = (local_int_20 + local_int_28); yading@10: yading@10: qdm2_fft_init_coefficient(q, sub_packet, offset, duration, channel, exp, phase); yading@10: if (stereo) yading@10: qdm2_fft_init_coefficient(q, sub_packet, offset, duration, (1 - channel), stereo_exp, stereo_phase); yading@10: } yading@10: yading@10: offset++; yading@10: } yading@10: } yading@10: yading@10: yading@10: static void qdm2_decode_fft_packets (QDM2Context *q) yading@10: { yading@10: int i, j, min, max, value, type, unknown_flag; yading@10: GetBitContext gb; yading@10: yading@10: if (q->sub_packet_list_B[0].packet == NULL) yading@10: return; yading@10: yading@10: /* reset minimum indexes for FFT coefficients */ yading@10: q->fft_coefs_index = 0; yading@10: for (i=0; i < 5; i++) yading@10: q->fft_coefs_min_index[i] = -1; yading@10: yading@10: /* process subpackets ordered by type, largest type first */ yading@10: for (i = 0, max = 256; i < q->sub_packets_B; i++) { yading@10: QDM2SubPacket *packet= NULL; yading@10: yading@10: /* find subpacket with largest type less than max */ yading@10: for (j = 0, min = 0; j < q->sub_packets_B; j++) { yading@10: value = q->sub_packet_list_B[j].packet->type; yading@10: if (value > min && value < max) { yading@10: min = value; yading@10: packet = q->sub_packet_list_B[j].packet; yading@10: } yading@10: } yading@10: yading@10: max = min; yading@10: yading@10: /* check for errors (?) */ yading@10: if (!packet) yading@10: return; yading@10: yading@10: if (i == 0 && (packet->type < 16 || packet->type >= 48 || fft_subpackets[packet->type - 16])) yading@10: return; yading@10: yading@10: /* decode FFT tones */ yading@10: init_get_bits (&gb, packet->data, packet->size*8); yading@10: yading@10: if (packet->type >= 32 && packet->type < 48 && !fft_subpackets[packet->type - 16]) yading@10: unknown_flag = 1; yading@10: else yading@10: unknown_flag = 0; yading@10: yading@10: type = packet->type; yading@10: yading@10: if ((type >= 17 && type < 24) || (type >= 33 && type < 40)) { yading@10: int duration = q->sub_sampling + 5 - (type & 15); yading@10: yading@10: if (duration >= 0 && duration < 4) yading@10: qdm2_fft_decode_tones(q, duration, &gb, unknown_flag); yading@10: } else if (type == 31) { yading@10: for (j=0; j < 4; j++) yading@10: qdm2_fft_decode_tones(q, j, &gb, unknown_flag); yading@10: } else if (type == 46) { yading@10: for (j=0; j < 6; j++) yading@10: q->fft_level_exp[j] = get_bits(&gb, 6); yading@10: for (j=0; j < 4; j++) yading@10: qdm2_fft_decode_tones(q, j, &gb, unknown_flag); yading@10: } yading@10: } // Loop on B packets yading@10: yading@10: /* calculate maximum indexes for FFT coefficients */ yading@10: for (i = 0, j = -1; i < 5; i++) yading@10: if (q->fft_coefs_min_index[i] >= 0) { yading@10: if (j >= 0) yading@10: q->fft_coefs_max_index[j] = q->fft_coefs_min_index[i]; yading@10: j = i; yading@10: } yading@10: if (j >= 0) yading@10: q->fft_coefs_max_index[j] = q->fft_coefs_index; yading@10: } yading@10: yading@10: yading@10: static void qdm2_fft_generate_tone (QDM2Context *q, FFTTone *tone) yading@10: { yading@10: float level, f[6]; yading@10: int i; yading@10: QDM2Complex c; yading@10: const double iscale = 2.0*M_PI / 512.0; yading@10: yading@10: tone->phase += tone->phase_shift; yading@10: yading@10: /* calculate current level (maximum amplitude) of tone */ yading@10: level = fft_tone_envelope_table[tone->duration][tone->time_index] * tone->level; yading@10: c.im = level * sin(tone->phase*iscale); yading@10: c.re = level * cos(tone->phase*iscale); yading@10: yading@10: /* generate FFT coefficients for tone */ yading@10: if (tone->duration >= 3 || tone->cutoff >= 3) { yading@10: tone->complex[0].im += c.im; yading@10: tone->complex[0].re += c.re; yading@10: tone->complex[1].im -= c.im; yading@10: tone->complex[1].re -= c.re; yading@10: } else { yading@10: f[1] = -tone->table[4]; yading@10: f[0] = tone->table[3] - tone->table[0]; yading@10: f[2] = 1.0 - tone->table[2] - tone->table[3]; yading@10: f[3] = tone->table[1] + tone->table[4] - 1.0; yading@10: f[4] = tone->table[0] - tone->table[1]; yading@10: f[5] = tone->table[2]; yading@10: for (i = 0; i < 2; i++) { yading@10: tone->complex[fft_cutoff_index_table[tone->cutoff][i]].re += c.re * f[i]; yading@10: tone->complex[fft_cutoff_index_table[tone->cutoff][i]].im += c.im *((tone->cutoff <= i) ? -f[i] : f[i]); yading@10: } yading@10: for (i = 0; i < 4; i++) { yading@10: tone->complex[i].re += c.re * f[i+2]; yading@10: tone->complex[i].im += c.im * f[i+2]; yading@10: } yading@10: } yading@10: yading@10: /* copy the tone if it has not yet died out */ yading@10: if (++tone->time_index < ((1 << (5 - tone->duration)) - 1)) { yading@10: memcpy(&q->fft_tones[q->fft_tone_end], tone, sizeof(FFTTone)); yading@10: q->fft_tone_end = (q->fft_tone_end + 1) % 1000; yading@10: } yading@10: } yading@10: yading@10: yading@10: static void qdm2_fft_tone_synthesizer (QDM2Context *q, int sub_packet) yading@10: { yading@10: int i, j, ch; yading@10: const double iscale = 0.25 * M_PI; yading@10: yading@10: for (ch = 0; ch < q->channels; ch++) { yading@10: memset(q->fft.complex[ch], 0, q->fft_size * sizeof(QDM2Complex)); yading@10: } yading@10: yading@10: yading@10: /* apply FFT tones with duration 4 (1 FFT period) */ yading@10: if (q->fft_coefs_min_index[4] >= 0) yading@10: for (i = q->fft_coefs_min_index[4]; i < q->fft_coefs_max_index[4]; i++) { yading@10: float level; yading@10: QDM2Complex c; yading@10: yading@10: if (q->fft_coefs[i].sub_packet != sub_packet) yading@10: break; yading@10: yading@10: ch = (q->channels == 1) ? 0 : q->fft_coefs[i].channel; yading@10: level = (q->fft_coefs[i].exp < 0) ? 0.0 : fft_tone_level_table[q->superblocktype_2_3 ? 0 : 1][q->fft_coefs[i].exp & 63]; yading@10: yading@10: c.re = level * cos(q->fft_coefs[i].phase * iscale); yading@10: c.im = level * sin(q->fft_coefs[i].phase * iscale); yading@10: q->fft.complex[ch][q->fft_coefs[i].offset + 0].re += c.re; yading@10: q->fft.complex[ch][q->fft_coefs[i].offset + 0].im += c.im; yading@10: q->fft.complex[ch][q->fft_coefs[i].offset + 1].re -= c.re; yading@10: q->fft.complex[ch][q->fft_coefs[i].offset + 1].im -= c.im; yading@10: } yading@10: yading@10: /* generate existing FFT tones */ yading@10: for (i = q->fft_tone_end; i != q->fft_tone_start; ) { yading@10: qdm2_fft_generate_tone(q, &q->fft_tones[q->fft_tone_start]); yading@10: q->fft_tone_start = (q->fft_tone_start + 1) % 1000; yading@10: } yading@10: yading@10: /* create and generate new FFT tones with duration 0 (long) to 3 (short) */ yading@10: for (i = 0; i < 4; i++) yading@10: if (q->fft_coefs_min_index[i] >= 0) { yading@10: for (j = q->fft_coefs_min_index[i]; j < q->fft_coefs_max_index[i]; j++) { yading@10: int offset, four_i; yading@10: FFTTone tone; yading@10: yading@10: if (q->fft_coefs[j].sub_packet != sub_packet) yading@10: break; yading@10: yading@10: four_i = (4 - i); yading@10: offset = q->fft_coefs[j].offset >> four_i; yading@10: ch = (q->channels == 1) ? 0 : q->fft_coefs[j].channel; yading@10: yading@10: if (offset < q->frequency_range) { yading@10: if (offset < 2) yading@10: tone.cutoff = offset; yading@10: else yading@10: tone.cutoff = (offset >= 60) ? 3 : 2; yading@10: yading@10: tone.level = (q->fft_coefs[j].exp < 0) ? 0.0 : fft_tone_level_table[q->superblocktype_2_3 ? 0 : 1][q->fft_coefs[j].exp & 63]; yading@10: tone.complex = &q->fft.complex[ch][offset]; yading@10: tone.table = fft_tone_sample_table[i][q->fft_coefs[j].offset - (offset << four_i)]; yading@10: tone.phase = 64 * q->fft_coefs[j].phase - (offset << 8) - 128; yading@10: tone.phase_shift = (2 * q->fft_coefs[j].offset + 1) << (7 - four_i); yading@10: tone.duration = i; yading@10: tone.time_index = 0; yading@10: yading@10: qdm2_fft_generate_tone(q, &tone); yading@10: } yading@10: } yading@10: q->fft_coefs_min_index[i] = j; yading@10: } yading@10: } yading@10: yading@10: yading@10: static void qdm2_calculate_fft (QDM2Context *q, int channel, int sub_packet) yading@10: { yading@10: const float gain = (q->channels == 1 && q->nb_channels == 2) ? 0.5f : 1.0f; yading@10: float *out = q->output_buffer + channel; yading@10: int i; yading@10: q->fft.complex[channel][0].re *= 2.0f; yading@10: q->fft.complex[channel][0].im = 0.0f; yading@10: q->rdft_ctx.rdft_calc(&q->rdft_ctx, (FFTSample *)q->fft.complex[channel]); yading@10: /* add samples to output buffer */ yading@10: for (i = 0; i < FFALIGN(q->fft_size, 8); i++) { yading@10: out[0] += q->fft.complex[channel][i].re * gain; yading@10: out[q->channels] += q->fft.complex[channel][i].im * gain; yading@10: out += 2 * q->channels; yading@10: } yading@10: } yading@10: yading@10: yading@10: /** yading@10: * @param q context yading@10: * @param index subpacket number yading@10: */ yading@10: static void qdm2_synthesis_filter (QDM2Context *q, int index) yading@10: { yading@10: int i, k, ch, sb_used, sub_sampling, dither_state = 0; yading@10: yading@10: /* copy sb_samples */ yading@10: sb_used = QDM2_SB_USED(q->sub_sampling); yading@10: yading@10: for (ch = 0; ch < q->channels; ch++) yading@10: for (i = 0; i < 8; i++) yading@10: for (k=sb_used; k < SBLIMIT; k++) yading@10: q->sb_samples[ch][(8 * index) + i][k] = 0; yading@10: yading@10: for (ch = 0; ch < q->nb_channels; ch++) { yading@10: float *samples_ptr = q->samples + ch; yading@10: yading@10: for (i = 0; i < 8; i++) { yading@10: ff_mpa_synth_filter_float(&q->mpadsp, yading@10: q->synth_buf[ch], &(q->synth_buf_offset[ch]), yading@10: ff_mpa_synth_window_float, &dither_state, yading@10: samples_ptr, q->nb_channels, yading@10: q->sb_samples[ch][(8 * index) + i]); yading@10: samples_ptr += 32 * q->nb_channels; yading@10: } yading@10: } yading@10: yading@10: /* add samples to output buffer */ yading@10: sub_sampling = (4 >> q->sub_sampling); yading@10: yading@10: for (ch = 0; ch < q->channels; ch++) yading@10: for (i = 0; i < q->frame_size; i++) yading@10: q->output_buffer[q->channels * i + ch] += (1 << 23) * q->samples[q->nb_channels * sub_sampling * i + ch]; yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Init static data (does not depend on specific file) yading@10: * yading@10: * @param q context yading@10: */ yading@10: static av_cold void qdm2_init(QDM2Context *q) { yading@10: static int initialized = 0; yading@10: yading@10: if (initialized != 0) yading@10: return; yading@10: initialized = 1; yading@10: yading@10: qdm2_init_vlc(); yading@10: ff_mpa_synth_init_float(ff_mpa_synth_window_float); yading@10: softclip_table_init(); yading@10: rnd_table_init(); yading@10: init_noise_samples(); yading@10: yading@10: av_log(NULL, AV_LOG_DEBUG, "init done\n"); yading@10: } yading@10: yading@10: yading@10: /** yading@10: * Init parameters from codec extradata yading@10: */ yading@10: static av_cold int qdm2_decode_init(AVCodecContext *avctx) yading@10: { yading@10: QDM2Context *s = avctx->priv_data; yading@10: uint8_t *extradata; yading@10: int extradata_size; yading@10: int tmp_val, tmp, size; yading@10: yading@10: /* extradata parsing yading@10: yading@10: Structure: yading@10: wave { yading@10: frma (QDM2) yading@10: QDCA yading@10: QDCP yading@10: } yading@10: yading@10: 32 size (including this field) yading@10: 32 tag (=frma) yading@10: 32 type (=QDM2 or QDMC) yading@10: yading@10: 32 size (including this field, in bytes) yading@10: 32 tag (=QDCA) // maybe mandatory parameters yading@10: 32 unknown (=1) yading@10: 32 channels (=2) yading@10: 32 samplerate (=44100) yading@10: 32 bitrate (=96000) yading@10: 32 block size (=4096) yading@10: 32 frame size (=256) (for one channel) yading@10: 32 packet size (=1300) yading@10: yading@10: 32 size (including this field, in bytes) yading@10: 32 tag (=QDCP) // maybe some tuneable parameters yading@10: 32 float1 (=1.0) yading@10: 32 zero ? yading@10: 32 float2 (=1.0) yading@10: 32 float3 (=1.0) yading@10: 32 unknown (27) yading@10: 32 unknown (8) yading@10: 32 zero ? yading@10: */ yading@10: yading@10: if (!avctx->extradata || (avctx->extradata_size < 48)) { yading@10: av_log(avctx, AV_LOG_ERROR, "extradata missing or truncated\n"); yading@10: return -1; yading@10: } yading@10: yading@10: extradata = avctx->extradata; yading@10: extradata_size = avctx->extradata_size; yading@10: yading@10: while (extradata_size > 7) { yading@10: if (!memcmp(extradata, "frmaQDM", 7)) yading@10: break; yading@10: extradata++; yading@10: extradata_size--; yading@10: } yading@10: yading@10: if (extradata_size < 12) { yading@10: av_log(avctx, AV_LOG_ERROR, "not enough extradata (%i)\n", yading@10: extradata_size); yading@10: return -1; yading@10: } yading@10: yading@10: if (memcmp(extradata, "frmaQDM", 7)) { yading@10: av_log(avctx, AV_LOG_ERROR, "invalid headers, QDM? not found\n"); yading@10: return -1; yading@10: } yading@10: yading@10: if (extradata[7] == 'C') { yading@10: // s->is_qdmc = 1; yading@10: av_log(avctx, AV_LOG_ERROR, "stream is QDMC version 1, which is not supported\n"); yading@10: return -1; yading@10: } yading@10: yading@10: extradata += 8; yading@10: extradata_size -= 8; yading@10: yading@10: size = AV_RB32(extradata); yading@10: yading@10: if(size > extradata_size){ yading@10: av_log(avctx, AV_LOG_ERROR, "extradata size too small, %i < %i\n", yading@10: extradata_size, size); yading@10: return -1; yading@10: } yading@10: yading@10: extradata += 4; yading@10: av_log(avctx, AV_LOG_DEBUG, "size: %d\n", size); yading@10: if (AV_RB32(extradata) != MKBETAG('Q','D','C','A')) { yading@10: av_log(avctx, AV_LOG_ERROR, "invalid extradata, expecting QDCA\n"); yading@10: return -1; yading@10: } yading@10: yading@10: extradata += 8; yading@10: yading@10: avctx->channels = s->nb_channels = s->channels = AV_RB32(extradata); yading@10: extradata += 4; yading@10: if (s->channels <= 0 || s->channels > MPA_MAX_CHANNELS) { yading@10: av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n"); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: avctx->channel_layout = avctx->channels == 2 ? AV_CH_LAYOUT_STEREO : yading@10: AV_CH_LAYOUT_MONO; yading@10: yading@10: avctx->sample_rate = AV_RB32(extradata); yading@10: extradata += 4; yading@10: yading@10: avctx->bit_rate = AV_RB32(extradata); yading@10: extradata += 4; yading@10: yading@10: s->group_size = AV_RB32(extradata); yading@10: extradata += 4; yading@10: yading@10: s->fft_size = AV_RB32(extradata); yading@10: extradata += 4; yading@10: yading@10: s->checksum_size = AV_RB32(extradata); yading@10: if (s->checksum_size >= 1U << 28) { yading@10: av_log(avctx, AV_LOG_ERROR, "data block size too large (%u)\n", s->checksum_size); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: s->fft_order = av_log2(s->fft_size) + 1; yading@10: yading@10: // something like max decodable tones yading@10: s->group_order = av_log2(s->group_size) + 1; yading@10: s->frame_size = s->group_size / 16; // 16 iterations per super block yading@10: yading@10: if (s->frame_size > QDM2_MAX_FRAME_SIZE) yading@10: return AVERROR_INVALIDDATA; yading@10: yading@10: s->sub_sampling = s->fft_order - 7; yading@10: s->frequency_range = 255 / (1 << (2 - s->sub_sampling)); yading@10: yading@10: switch ((s->sub_sampling * 2 + s->channels - 1)) { yading@10: case 0: tmp = 40; break; yading@10: case 1: tmp = 48; break; yading@10: case 2: tmp = 56; break; yading@10: case 3: tmp = 72; break; yading@10: case 4: tmp = 80; break; yading@10: case 5: tmp = 100;break; yading@10: default: tmp=s->sub_sampling; break; yading@10: } yading@10: tmp_val = 0; yading@10: if ((tmp * 1000) < avctx->bit_rate) tmp_val = 1; yading@10: if ((tmp * 1440) < avctx->bit_rate) tmp_val = 2; yading@10: if ((tmp * 1760) < avctx->bit_rate) tmp_val = 3; yading@10: if ((tmp * 2240) < avctx->bit_rate) tmp_val = 4; yading@10: s->cm_table_select = tmp_val; yading@10: yading@10: if (s->sub_sampling == 0) yading@10: tmp = 7999; yading@10: else yading@10: tmp = ((-(s->sub_sampling -1)) & 8000) + 20000; yading@10: /* yading@10: 0: 7999 -> 0 yading@10: 1: 20000 -> 2 yading@10: 2: 28000 -> 2 yading@10: */ yading@10: if (tmp < 8000) yading@10: s->coeff_per_sb_select = 0; yading@10: else if (tmp <= 16000) yading@10: s->coeff_per_sb_select = 1; yading@10: else yading@10: s->coeff_per_sb_select = 2; yading@10: yading@10: // Fail on unknown fft order yading@10: if ((s->fft_order < 7) || (s->fft_order > 9)) { yading@10: av_log(avctx, AV_LOG_ERROR, "Unknown FFT order (%d), contact the developers!\n", s->fft_order); yading@10: return -1; yading@10: } yading@10: if (s->fft_size != (1 << (s->fft_order - 1))) { yading@10: av_log(avctx, AV_LOG_ERROR, "FFT size %d not power of 2.\n", s->fft_size); yading@10: return AVERROR_INVALIDDATA; yading@10: } yading@10: yading@10: ff_rdft_init(&s->rdft_ctx, s->fft_order, IDFT_C2R); yading@10: ff_mpadsp_init(&s->mpadsp); yading@10: yading@10: qdm2_init(s); yading@10: yading@10: avctx->sample_fmt = AV_SAMPLE_FMT_S16; yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: yading@10: static av_cold int qdm2_decode_close(AVCodecContext *avctx) yading@10: { yading@10: QDM2Context *s = avctx->priv_data; yading@10: yading@10: ff_rdft_end(&s->rdft_ctx); yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: yading@10: static int qdm2_decode (QDM2Context *q, const uint8_t *in, int16_t *out) yading@10: { yading@10: int ch, i; yading@10: const int frame_size = (q->frame_size * q->channels); yading@10: yading@10: if((unsigned)frame_size > FF_ARRAY_ELEMS(q->output_buffer)/2) yading@10: return -1; yading@10: yading@10: /* select input buffer */ yading@10: q->compressed_data = in; yading@10: q->compressed_size = q->checksum_size; yading@10: yading@10: /* copy old block, clear new block of output samples */ yading@10: memmove(q->output_buffer, &q->output_buffer[frame_size], frame_size * sizeof(float)); yading@10: memset(&q->output_buffer[frame_size], 0, frame_size * sizeof(float)); yading@10: yading@10: /* decode block of QDM2 compressed data */ yading@10: if (q->sub_packet == 0) { yading@10: q->has_errors = 0; // zero it for a new super block yading@10: av_log(NULL,AV_LOG_DEBUG,"Superblock follows\n"); yading@10: qdm2_decode_super_block(q); yading@10: } yading@10: yading@10: /* parse subpackets */ yading@10: if (!q->has_errors) { yading@10: if (q->sub_packet == 2) yading@10: qdm2_decode_fft_packets(q); yading@10: yading@10: qdm2_fft_tone_synthesizer(q, q->sub_packet); yading@10: } yading@10: yading@10: /* sound synthesis stage 1 (FFT) */ yading@10: for (ch = 0; ch < q->channels; ch++) { yading@10: qdm2_calculate_fft(q, ch, q->sub_packet); yading@10: yading@10: if (!q->has_errors && q->sub_packet_list_C[0].packet != NULL) { yading@10: SAMPLES_NEEDED_2("has errors, and C list is not empty") yading@10: return -1; yading@10: } yading@10: } yading@10: yading@10: /* sound synthesis stage 2 (MPEG audio like synthesis filter) */ yading@10: if (!q->has_errors && q->do_synth_filter) yading@10: qdm2_synthesis_filter(q, q->sub_packet); yading@10: yading@10: q->sub_packet = (q->sub_packet + 1) % 16; yading@10: yading@10: /* clip and convert output float[] to 16bit signed samples */ yading@10: for (i = 0; i < frame_size; i++) { yading@10: int value = (int)q->output_buffer[i]; yading@10: yading@10: if (value > SOFTCLIP_THRESHOLD) yading@10: value = (value > HARDCLIP_THRESHOLD) ? 32767 : softclip_table[ value - SOFTCLIP_THRESHOLD]; yading@10: else if (value < -SOFTCLIP_THRESHOLD) yading@10: value = (value < -HARDCLIP_THRESHOLD) ? -32767 : -softclip_table[-value - SOFTCLIP_THRESHOLD]; yading@10: yading@10: out[i] = value; yading@10: } yading@10: yading@10: return 0; yading@10: } yading@10: yading@10: yading@10: static int qdm2_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: QDM2Context *s = avctx->priv_data; yading@10: int16_t *out; yading@10: int i, ret; yading@10: yading@10: if(!buf) yading@10: return 0; yading@10: if(buf_size < s->checksum_size) yading@10: return -1; yading@10: yading@10: /* get output buffer */ yading@10: frame->nb_samples = 16 * s->frame_size; yading@10: if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) yading@10: return ret; yading@10: out = (int16_t *)frame->data[0]; yading@10: yading@10: for (i = 0; i < 16; i++) { yading@10: if (qdm2_decode(s, buf, out) < 0) yading@10: return -1; yading@10: out += s->channels * s->frame_size; yading@10: } yading@10: yading@10: *got_frame_ptr = 1; yading@10: yading@10: return s->checksum_size; yading@10: } yading@10: yading@10: AVCodec ff_qdm2_decoder = yading@10: { yading@10: .name = "qdm2", yading@10: .type = AVMEDIA_TYPE_AUDIO, yading@10: .id = AV_CODEC_ID_QDM2, yading@10: .priv_data_size = sizeof(QDM2Context), yading@10: .init = qdm2_decode_init, yading@10: .close = qdm2_decode_close, yading@10: .decode = qdm2_decode_frame, yading@10: .capabilities = CODEC_CAP_DR1, yading@10: .long_name = NULL_IF_CONFIG_SMALL("QDesign Music Codec 2"), yading@10: };