130 lines
3.7 KiB
C
130 lines
3.7 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2005 Dave Chapman
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef _M4A_H
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#define _M4A_H
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#include <codecs.h>
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#include <inttypes.h>
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/* AAC codecdata appears to always be less than 8 bytes - see
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AudioSpecificConfig2 in libfaad/mp4.c
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ALAC codecdata appears to always be 44 bytes (see alac_set_info in
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libalac/alac.c) but my test file contains 56 bytes.
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So we go safe and round up to 64 bytes - if we find more than this,
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we give an error (even though we could possibly continue), so we
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can increase this buffer.
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*/
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#define MAX_CODECDATA_SIZE 64
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typedef struct {
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struct codec_api* ci;
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int eof;
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} stream_t;
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typedef uint32_t fourcc_t;
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typedef struct
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{
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uint16_t num_channels;
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uint16_t sound_sample_size;
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uint32_t sound_sample_rate;
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fourcc_t format;
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void *buf;
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struct {
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uint32_t first_chunk;
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uint32_t num_samples;
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} *sample_to_chunk;
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uint32_t num_sample_to_chunks;
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uint32_t *chunk_offset;
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uint32_t num_chunk_offsets;
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struct {
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uint32_t sample_count;
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uint32_t sample_duration;
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} *time_to_sample;
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uint32_t num_time_to_samples;
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uint16_t *sample_byte_size;
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uint32_t num_sample_byte_sizes;
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uint32_t codecdata_len;
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uint8_t codecdata[MAX_CODECDATA_SIZE];
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int mdat_offset;
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uint32_t mdat_len;
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#if 0
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void *mdat;
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#endif
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} demux_res_t;
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int qtmovie_read(stream_t *stream, demux_res_t *demux_res);
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#ifndef MAKEFOURCC
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#define MAKEFOURCC(ch0, ch1, ch2, ch3) ( \
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( (int32_t)(char)(ch0) << 24 ) | \
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( (int32_t)(char)(ch1) << 16 ) | \
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( (int32_t)(char)(ch2) << 8 ) | \
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( (int32_t)(char)(ch3) ) )
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#endif
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#ifndef SLPITFOURCC
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/* splits it into ch0, ch1, ch2, ch3 - use for printf's */
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#define SPLITFOURCC(code) \
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(char)((int32_t)code >> 24), \
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(char)((int32_t)code >> 16), \
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(char)((int32_t)code >> 8), \
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(char)code
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#endif
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void stream_read(stream_t *stream, size_t len, void *buf);
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int32_t stream_tell(stream_t *stream);
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int32_t stream_read_int32(stream_t *stream);
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uint32_t stream_read_uint32(stream_t *stream);
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int16_t stream_read_int16(stream_t *stream);
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uint16_t stream_read_uint16(stream_t *stream);
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int8_t stream_read_int8(stream_t *stream);
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uint8_t stream_read_uint8(stream_t *stream);
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void stream_skip(stream_t *stream, size_t skip);
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int stream_eof(stream_t *stream);
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void stream_create(stream_t *stream,struct codec_api* ci);
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int get_sample_info(demux_res_t *demux_res, uint32_t sample,
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uint32_t *sample_duration, uint32_t *sample_byte_size);
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unsigned int get_sample_offset(demux_res_t *demux_res, uint32_t sample);
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unsigned int alac_seek (demux_res_t* demux_res, stream_t* stream,
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uint32_t sound_sample_loc, uint32_t* sound_samples_done,
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int* current_sample);
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unsigned int alac_seek_raw (demux_res_t* demux_res, stream_t* stream,
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uint32_t file_loc, uint32_t* sound_samples_done, int* current_sample);
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#endif /* STREAM_H */
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