yading@10: /* yading@10: * TAK decoder/demuxer common code yading@10: * Copyright (c) 2012 Paul B Mahol 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: * TAK (Tom's lossless Audio Kompressor) decoder/demuxer common functions yading@10: */ yading@10: yading@10: #ifndef AVCODEC_TAK_H yading@10: #define AVCODEC_TAK_H yading@10: yading@10: #include yading@10: yading@10: #define BITSTREAM_READER_LE yading@10: #include "get_bits.h" yading@10: #include "avcodec.h" yading@10: yading@10: #define TAK_FORMAT_DATA_TYPE_BITS 3 yading@10: #define TAK_FORMAT_SAMPLE_RATE_BITS 18 yading@10: #define TAK_FORMAT_BPS_BITS 5 yading@10: #define TAK_FORMAT_CHANNEL_BITS 4 yading@10: #define TAK_FORMAT_VALID_BITS 5 yading@10: #define TAK_FORMAT_CH_LAYOUT_BITS 6 yading@10: #define TAK_SIZE_FRAME_DURATION_BITS 4 yading@10: #define TAK_SIZE_SAMPLES_NUM_BITS 35 yading@10: #define TAK_LAST_FRAME_POS_BITS 40 yading@10: #define TAK_LAST_FRAME_SIZE_BITS 24 yading@10: #define TAK_ENCODER_CODEC_BITS 6 yading@10: #define TAK_ENCODER_PROFILE_BITS 4 yading@10: #define TAK_ENCODER_VERSION_BITS 24 yading@10: #define TAK_SAMPLE_RATE_MIN 6000 yading@10: #define TAK_CHANNELS_MIN 1 yading@10: #define TAK_BPS_MIN 8 yading@10: #define TAK_FRAME_HEADER_FLAGS_BITS 3 yading@10: #define TAK_FRAME_HEADER_SYNC_ID 0xA0FF yading@10: #define TAK_FRAME_HEADER_SYNC_ID_BITS 16 yading@10: #define TAK_FRAME_HEADER_SAMPLE_COUNT_BITS 14 yading@10: #define TAK_FRAME_HEADER_NO_BITS 21 yading@10: #define TAK_FRAME_DURATION_QUANT_SHIFT 5 yading@10: #define TAK_CRC24_BITS 24 yading@10: yading@10: yading@10: #define TAK_FRAME_FLAG_IS_LAST 0x1 yading@10: #define TAK_FRAME_FLAG_HAS_INFO 0x2 yading@10: #define TAK_FRAME_FLAG_HAS_METADATA 0x4 yading@10: yading@10: #define TAK_MAX_CHANNELS (1 << TAK_FORMAT_CHANNEL_BITS) yading@10: yading@10: #define TAK_MIN_FRAME_HEADER_BITS (TAK_FRAME_HEADER_SYNC_ID_BITS + \ yading@10: TAK_FRAME_HEADER_FLAGS_BITS + \ yading@10: TAK_FRAME_HEADER_NO_BITS + \ yading@10: TAK_CRC24_BITS) yading@10: yading@10: #define TAK_MIN_FRAME_HEADER_LAST_BITS (TAK_MIN_FRAME_HEADER_BITS + 2 + \ yading@10: TAK_FRAME_HEADER_SAMPLE_COUNT_BITS) yading@10: yading@10: #define TAK_ENCODER_BITS (TAK_ENCODER_CODEC_BITS + \ yading@10: TAK_ENCODER_PROFILE_BITS) yading@10: yading@10: #define TAK_SIZE_BITS (TAK_SIZE_SAMPLES_NUM_BITS + \ yading@10: TAK_SIZE_FRAME_DURATION_BITS) yading@10: yading@10: #define TAK_FORMAT_BITS (TAK_FORMAT_DATA_TYPE_BITS + \ yading@10: TAK_FORMAT_SAMPLE_RATE_BITS + \ yading@10: TAK_FORMAT_BPS_BITS + \ yading@10: TAK_FORMAT_CHANNEL_BITS + 1 + \ yading@10: TAK_FORMAT_VALID_BITS + 1 + \ yading@10: TAK_FORMAT_CH_LAYOUT_BITS * \ yading@10: TAK_MAX_CHANNELS) yading@10: yading@10: #define TAK_STREAMINFO_BITS (TAK_ENCODER_BITS + \ yading@10: TAK_SIZE_BITS + \ yading@10: TAK_FORMAT_BITS) yading@10: yading@10: #define TAK_MAX_FRAME_HEADER_BITS (TAK_MIN_FRAME_HEADER_LAST_BITS + \ yading@10: TAK_STREAMINFO_BITS + 31) yading@10: yading@10: #define TAK_STREAMINFO_BYTES ((TAK_STREAMINFO_BITS + 7) / 8) yading@10: #define TAK_MAX_FRAME_HEADER_BYTES ((TAK_MAX_FRAME_HEADER_BITS + 7) / 8) yading@10: #define TAK_MIN_FRAME_HEADER_BYTES ((TAK_MIN_FRAME_HEADER_BITS + 7) / 8) yading@10: yading@10: enum TAKCodecType { yading@10: TAK_CODEC_MONO_STEREO = 2, yading@10: TAK_CODEC_MULTICHANNEL = 4, yading@10: }; yading@10: yading@10: enum TAKMetaDataType { yading@10: TAK_METADATA_END = 0, yading@10: TAK_METADATA_STREAMINFO, yading@10: TAK_METADATA_SEEKTABLE, yading@10: TAK_METADATA_SIMPLE_WAVE_DATA, yading@10: TAK_METADATA_ENCODER, yading@10: TAK_METADATA_PADDING, yading@10: TAK_METADATA_MD5, yading@10: TAK_METADATA_LAST_FRAME, yading@10: }; yading@10: yading@10: enum TAKFrameSizeType { yading@10: TAK_FST_94ms = 0, yading@10: TAK_FST_125ms, yading@10: TAK_FST_188ms, yading@10: TAK_FST_250ms, yading@10: TAK_FST_4096, yading@10: TAK_FST_8192, yading@10: TAK_FST_16384, yading@10: TAK_FST_512, yading@10: TAK_FST_1024, yading@10: TAK_FST_2048, yading@10: }; yading@10: yading@10: typedef struct TAKStreamInfo { yading@10: int flags; yading@10: enum TAKCodecType codec; yading@10: int data_type; yading@10: int sample_rate; yading@10: int channels; yading@10: int bps; yading@10: int frame_num; yading@10: int frame_samples; yading@10: int last_frame_samples; yading@10: uint64_t ch_layout; yading@10: int64_t samples; yading@10: } TAKStreamInfo; yading@10: yading@10: void ff_tak_init_crc(void); yading@10: yading@10: int ff_tak_check_crc(const uint8_t *buf, unsigned int buf_size); yading@10: yading@10: /** yading@10: * Parse the Streaminfo metadata block. yading@10: * @param[in] gb pointer to GetBitContext yading@10: * @param[out] s storage for parsed information yading@10: */ yading@10: void avpriv_tak_parse_streaminfo(GetBitContext *gb, TAKStreamInfo *s); yading@10: yading@10: /** yading@10: * Validate and decode a frame header. yading@10: * @param avctx AVCodecContext to use as av_log() context yading@10: * @param[in] gb GetBitContext from which to read frame header yading@10: * @param[out] s frame information yading@10: * @param log_level_offset log level offset, can be used to silence yading@10: * error messages. yading@10: * @return non-zero on error, 0 if OK yading@10: */ yading@10: int ff_tak_decode_frame_header(AVCodecContext *avctx, GetBitContext *gb, yading@10: TAKStreamInfo *s, int log_level_offset); yading@10: #endif /* AVCODEC_TAK_H */