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- Calculate start offset from data length field

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- Calculate loop offsets for first channel only
- Determine interleave block size from header field
This commit is contained in:
Chris Moeller 2013-07-05 11:48:17 -07:00
parent a41128c6ad
commit 8ebecb4d47
1 changed files with 30 additions and 13 deletions
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39
src/meta/ps2_joe.c
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@ -10,7 +10,11 @@ VGMSTREAM * init_vgmstream_ps2_joe(STREAMFILE *streamFile) {
off_t loopStart = 0;
off_t loopEnd = 0;
off_t readOffset = 0;
off_t blockOffset = 0;
off_t sampleOffset = 0;
size_t fileLength;
size_t dataLength;
size_t dataInterleave;
int loop_flag;
int channel_count;
@ -29,44 +33,57 @@ VGMSTREAM * init_vgmstream_ps2_joe(STREAMFILE *streamFile) {
vgmstream = allocate_vgmstream(channel_count,loop_flag);
if (!vgmstream) goto fail;
fileLength = get_streamfile_size(streamFile);
dataLength = read_32bitLE(0x4,streamFile);
dataInterleave = read_32bitLE(0x8,streamFile);
/* fill in the vital statistics */
start_offset = 0x4020;
start_offset = fileLength - dataLength;
vgmstream->channels = channel_count;
vgmstream->sample_rate = read_32bitLE(0x0,streamFile);
vgmstream->coding_type = coding_PSX;
vgmstream->num_samples = (get_streamfile_size(streamFile)-start_offset)*28/16/channel_count;
vgmstream->num_samples = dataLength*28/16/channel_count;
fileLength = get_streamfile_size(streamFile);
readOffset = start_offset;
do {
off_t blockRead = (off_t)read_streamfile(testBuffer,readOffset,0x10,streamFile);
readOffset+=(off_t)read_streamfile(testBuffer,readOffset,0x10,streamFile);
readOffset += blockRead;
blockOffset += blockRead;
if (blockOffset >= dataInterleave) {
readOffset += dataInterleave;
blockOffset -= dataInterleave;
}
/* Loop Start */
if(testBuffer[0x01]==0x06) {
if(loopStart == 0) loopStart = readOffset-0x10;
if(loopStart == 0) loopStart = sampleOffset;
/* break; */
}
sampleOffset += 28;
/* Loop End */
if(testBuffer[0x01]==0x03) {
if(loopEnd == 0) loopEnd = readOffset-0x10;
if(loopEnd == 0) loopEnd = sampleOffset;
/* break; */
}
} while (streamFile->get_offset(streamFile)<(int32_t)fileLength);
if(loopStart == 0) {
if(loopStart == 0 && loopEnd == 0) {
loop_flag = 0;
vgmstream->num_samples = read_32bitLE(0x4,streamFile)*28/16/channel_count;
vgmstream->num_samples = dataLength*28/16/channel_count;
} else {
loop_flag = 1;
vgmstream->loop_start_sample = (loopStart-start_offset-0x20)*28/16/channel_count;
vgmstream->loop_end_sample = (loopEnd-start_offset+0x20)*28/16/channel_count;
vgmstream->loop_start_sample = loopStart;
vgmstream->loop_end_sample = loopEnd;
}
vgmstream->layout_type = layout_interleave;
vgmstream->interleave_block_size = 0x10;
vgmstream->interleave_block_size = dataInterleave;
vgmstream->meta_type = meta_PS2_JOE;
/* open the file for reading */