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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 Dave Chapman
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef _M4A_H
#define _M4A_H
#include <codecs.h>
#include <inttypes.h>
/* AAC codecdata appears to always be less than 8 bytes - see
AudioSpecificConfig2 in libfaad/mp4.c
ALAC codecdata appears to always be 44 bytes (see alac_set_info in
libalac/alac.c) but my test file contains 56 bytes.
So we go safe and round up to 64 bytes - if we find more than this,
we give an error (even though we could possibly continue), so we
can increase this buffer.
*/
#define MAX_CODECDATA_SIZE 64
typedef struct {
struct codec_api* ci;
int eof;
} stream_t;
typedef uint32_t fourcc_t;
typedef struct
{
uint32_t first_chunk;
uint32_t num_samples;
} sample_to_chunk_t;
typedef struct
{
uint32_t sample_count;
uint32_t sample_duration;
} time_to_sample_t;
typedef struct
{
uint32_t sample;
uint32_t offset;
} sample_offset_t;
typedef struct
{
uint16_t num_channels;
uint16_t sound_sample_size;
uint32_t sound_sample_rate;
fourcc_t format;
void *buf;
sample_to_chunk_t *sample_to_chunk;
uint32_t num_sample_to_chunks;
sample_offset_t *lookup_table;
uint32_t num_lookup_table;
time_to_sample_t *time_to_sample;
uint32_t num_time_to_samples;
uint32_t num_sample_byte_sizes;
uint32_t codecdata_len;
uint8_t codecdata[MAX_CODECDATA_SIZE];
int mdat_offset;
uint32_t mdat_len;
#if 0
void *mdat;
#endif
} demux_res_t;
int qtmovie_read(stream_t *stream, demux_res_t *demux_res);
#ifndef MAKEFOURCC
#define MAKEFOURCC(ch0, ch1, ch2, ch3) ( \
( (int32_t)(char)(ch0) << 24 ) | \
( (int32_t)(char)(ch1) << 16 ) | \
( (int32_t)(char)(ch2) << 8 ) | \
( (int32_t)(char)(ch3) ) )
#endif
#ifndef SLPITFOURCC
/* splits it into ch0, ch1, ch2, ch3 - use for printf's */
#define SPLITFOURCC(code) \
(char)((int32_t)code >> 24), \
(char)((int32_t)code >> 16), \
(char)((int32_t)code >> 8), \
(char)code
#endif
void stream_read(stream_t *stream, size_t len, void *buf);
int32_t stream_tell(stream_t *stream);
int32_t stream_read_int32(stream_t *stream);
uint32_t stream_read_uint32(stream_t *stream);
int16_t stream_read_int16(stream_t *stream);
uint16_t stream_read_uint16(stream_t *stream);
int8_t stream_read_int8(stream_t *stream);
uint8_t stream_read_uint8(stream_t *stream);
void stream_skip(stream_t *stream, size_t skip);
void stream_seek(stream_t *stream, size_t offset);
int stream_eof(stream_t *stream);
void stream_create(stream_t *stream,struct codec_api* ci);
int get_sample_info(demux_res_t *demux_res, uint32_t sample,
uint32_t *sample_duration, uint32_t *sample_byte_size);
unsigned int get_sample_offset(demux_res_t *demux_res, uint32_t sample);
unsigned int m4a_seek (demux_res_t* demux_res, stream_t* stream,
uint32_t sound_sample_loc, uint32_t* sound_samples_done,
int* current_sample);
unsigned int m4a_seek_raw (demux_res_t* demux_res, stream_t* stream,
uint32_t file_loc, uint32_t* sound_samples_done, int* current_sample);
int m4a_check_sample_offset(demux_res_t *demux_res, uint32_t frame, uint32_t *start);
#endif /* STREAM_H */
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