vgmstream/src/meta/ps2_va3.c
2018-10-27 23:49:52 +02:00

81 lines
2.6 KiB
C

#include "meta.h"
#include "../coding/coding.h"
/* VA3 - Konami / Sony Atrac3 Container [PS2 DDR Supernova 2 Arcade] */
VGMSTREAM * init_vgmstream_va3(STREAMFILE *streamFile) {
VGMSTREAM * vgmstream = NULL;
off_t start_offset;
int loop_flag, channel_count;
uint32_t data_size, loop_start, loop_end;
/* check extension, case insensitive */
if (!check_extensions(streamFile, "va3"))
goto fail;
if (read_32bitBE(0x00, streamFile) != 0x21334156) /* "!3AV" */
goto fail;
/* va3 header */
start_offset = 0x800;
data_size = read_32bitLE(0x04, streamFile);// get_streamfile_size(streamFile) - start_offset;
// pretty sure 0x4 LE 32 bit is some sort of filesize...
loop_flag = 0;
//0x18 is 1... what is this?
channel_count = 2;
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(channel_count, loop_flag);
if (!vgmstream) goto fail;
vgmstream->sample_rate = read_32bitLE(0x14, streamFile);
vgmstream->num_samples = read_32bitLE(0x08, streamFile);
vgmstream->channels = channel_count;
vgmstream->meta_type = meta_VA3;
loop_start = 0;
loop_end = 0;
#ifdef VGM_USE_FFMPEG
{
ffmpeg_codec_data *ffmpeg_data = NULL;
uint8_t buf[200];
int32_t bytes, samples_size = 1024, block_size, encoder_delay, joint_stereo;
block_size = 0xC0 * vgmstream->channels;
//max_samples = (data_size / block_size) * samples_size;
encoder_delay = 0x0;
joint_stereo = 0;
/* make a fake riff so FFmpeg can parse the ATRAC3 */
bytes = ffmpeg_make_riff_atrac3(buf, 200, vgmstream->num_samples, data_size, vgmstream->channels, vgmstream->sample_rate, block_size, joint_stereo, encoder_delay);
if (bytes <= 0) goto fail;
ffmpeg_data = init_ffmpeg_header_offset(streamFile, buf, bytes, start_offset, data_size);
if (!ffmpeg_data) goto fail;
vgmstream->codec_data = ffmpeg_data;
vgmstream->coding_type = coding_FFmpeg;
vgmstream->layout_type = layout_none;
//vgmstream->num_samples = max_samples;
if (loop_flag) {
vgmstream->loop_start_sample = (loop_start / block_size) * samples_size;
vgmstream->loop_end_sample = (loop_end / block_size) * samples_size;
}
}
#else
goto fail;
#endif
/* open the file for reading */
if (!vgmstream_open_stream(vgmstream, streamFile, start_offset))
goto fail;
return vgmstream;
fail:
close_vgmstream(vgmstream);
return NULL;
}