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/*
* TAK decoder/demuxer common code
* Copyright (c) 2012 Paul B Mahol
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* TAK (Tom's lossless Audio Kompressor) decoder/demuxer common functions
*/
#ifndef AVCODEC_TAK_H
#define AVCODEC_TAK_H
#include <stdint.h>
#include "avcodec.h"
#include "get_bits.h"
#define TAK_FORMAT_DATA_TYPE_BITS 3
#define TAK_FORMAT_SAMPLE_RATE_BITS 18
#define TAK_FORMAT_BPS_BITS 5
#define TAK_FORMAT_CHANNEL_BITS 4
#define TAK_FORMAT_VALID_BITS 5
#define TAK_FORMAT_CH_LAYOUT_BITS 6
#define TAK_SIZE_FRAME_DURATION_BITS 4
#define TAK_SIZE_SAMPLES_NUM_BITS 35
#define TAK_LAST_FRAME_POS_BITS 40
#define TAK_LAST_FRAME_SIZE_BITS 24
#define TAK_ENCODER_CODEC_BITS 6
#define TAK_ENCODER_PROFILE_BITS 4
#define TAK_ENCODER_VERSION_BITS 24
#define TAK_SAMPLE_RATE_MIN 6000
#define TAK_CHANNELS_MIN 1
#define TAK_BPS_MIN 8
#define TAK_FRAME_HEADER_FLAGS_BITS 3
#define TAK_FRAME_HEADER_SYNC_ID 0xA0FF
#define TAK_FRAME_HEADER_SYNC_ID_BITS 16
#define TAK_FRAME_HEADER_SAMPLE_COUNT_BITS 14
#define TAK_FRAME_HEADER_NO_BITS 21
#define TAK_FRAME_DURATION_QUANT_SHIFT 5
#define TAK_CRC24_BITS 24
#define TAK_FRAME_FLAG_IS_LAST 0x1
#define TAK_FRAME_FLAG_HAS_INFO 0x2
#define TAK_FRAME_FLAG_HAS_METADATA 0x4
#define TAK_MAX_CHANNELS (1 << TAK_FORMAT_CHANNEL_BITS)
#define TAK_MIN_FRAME_HEADER_BITS (TAK_FRAME_HEADER_SYNC_ID_BITS + \
TAK_FRAME_HEADER_FLAGS_BITS + \
TAK_FRAME_HEADER_NO_BITS + \
TAK_CRC24_BITS)
#define TAK_MIN_FRAME_HEADER_LAST_BITS (TAK_MIN_FRAME_HEADER_BITS + 2 + \
TAK_FRAME_HEADER_SAMPLE_COUNT_BITS)
#define TAK_ENCODER_BITS (TAK_ENCODER_CODEC_BITS + \
TAK_ENCODER_PROFILE_BITS)
#define TAK_SIZE_BITS (TAK_SIZE_SAMPLES_NUM_BITS + \
TAK_SIZE_FRAME_DURATION_BITS)
#define TAK_FORMAT_BITS (TAK_FORMAT_DATA_TYPE_BITS + \
TAK_FORMAT_SAMPLE_RATE_BITS + \
TAK_FORMAT_BPS_BITS + \
TAK_FORMAT_CHANNEL_BITS + 1 + \
TAK_FORMAT_VALID_BITS + 1 + \
TAK_FORMAT_CH_LAYOUT_BITS * \
TAK_MAX_CHANNELS)
#define TAK_STREAMINFO_BITS (TAK_ENCODER_BITS + \
TAK_SIZE_BITS + \
TAK_FORMAT_BITS)
#define TAK_MAX_FRAME_HEADER_BITS (TAK_MIN_FRAME_HEADER_LAST_BITS + \
TAK_STREAMINFO_BITS + 31)
#define TAK_STREAMINFO_BYTES ((TAK_STREAMINFO_BITS + 7) / 8)
#define TAK_MAX_FRAME_HEADER_BYTES ((TAK_MAX_FRAME_HEADER_BITS + 7) / 8)
#define TAK_MIN_FRAME_HEADER_BYTES ((TAK_MIN_FRAME_HEADER_BITS + 7) / 8)
enum TAKCodecType {
TAK_CODEC_MONO_STEREO = 2,
TAK_CODEC_MULTICHANNEL = 4
};
enum TAKMetaDataType {
TAK_METADATA_END = 0,
TAK_METADATA_STREAMINFO,
TAK_METADATA_SEEKTABLE,
TAK_METADATA_SIMPLE_WAVE_DATA,
TAK_METADATA_ENCODER,
TAK_METADATA_PADDING,
TAK_METADATA_MD5,
TAK_METADATA_LAST_FRAME,
};
enum TAKFrameSizeType {
TAK_FST_94ms = 0,
TAK_FST_125ms,
TAK_FST_188ms,
TAK_FST_250ms,
TAK_FST_4096,
TAK_FST_8192,
TAK_FST_16384,
TAK_FST_512,
TAK_FST_1024,
TAK_FST_2048,
};
typedef struct TAKStreamInfo {
int flags;
enum TAKCodecType codec;
int data_type;
int sample_rate;
int channels;
int bps;
int frame_num;
int frame_samples;
int last_frame_samples;
uint64_t ch_layout;
int64_t samples;
} TAKStreamInfo;
void ff_tak_init_crc(void);
int ff_tak_check_crc(const uint8_t *buf, unsigned int buf_size);
/**
* Parse the Streaminfo metadata block.
* @param[in] gb pointer to GetBitContext
* @param[out] s storage for parsed information
*/
void avpriv_tak_parse_streaminfo(GetBitContext *gb, TAKStreamInfo *s);
/**
* Validate and decode a frame header.
* @param avctx AVCodecContext to use as av_log() context
* @param[in] gb GetBitContext from which to read frame header
* @param[out] s frame information
* @param log_level_offset log level offset, can be used to silence
* error messages.
* @return non-zero on error, 0 if OK
*/
int ff_tak_decode_frame_header(AVCodecContext *avctx, GetBitContext *gb,
TAKStreamInfo *s, int log_level_offset);
#endif /* AVCODEC_TAK_H */
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