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another update from soneek for IMA support in BCSTM

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This commit is contained in:
Chris Moeller 2014-03-14 22:40:30 -07:00
parent 633eb7b545
commit 9148d4e14a
1 changed files with 52 additions and 12 deletions
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64
src/meta/bcstm.c
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@ -8,9 +8,11 @@ VGMSTREAM * init_vgmstream_bcstm(STREAMFILE *streamFile) {
coding_t coding_type;
off_t head_offset;
off_t seek_offset;
int codec_number;
int channel_count;
int loop_flag;
int ima = 0;
off_t start_offset;
/* check extension, case insensitive */
@ -29,11 +31,15 @@ VGMSTREAM * init_vgmstream_bcstm(STREAMFILE *streamFile) {
/* get head offset, check */
head_offset = read_32bitLE(0x18, streamFile);
if ((uint32_t)read_32bitBE(head_offset, streamFile) != 0x494E464F) /* "INFO" */
goto fail;
seek_offset = read_32bitLE(0x24, streamFile);
if ((uint32_t)read_32bitBE(seek_offset, streamFile) != 0x5345454B) /* "SEEK" If this header doesn't exist, assuming that the file is IMA */
ima = 1;
/* check type details */
codec_number = read_8bit(head_offset + 0x20, streamFile);
loop_flag = read_8bit(head_offset + 0x21, streamFile);
@ -47,7 +53,10 @@ VGMSTREAM * init_vgmstream_bcstm(STREAMFILE *streamFile) {
coding_type = coding_PCM16BE;
break;
case 2:
coding_type = coding_NGC_DSP;
if (ima)
coding_type = coding_INT_IMA;
else
coding_type = coding_NGC_DSP;
break;
default:
goto fail;
@ -64,19 +73,42 @@ VGMSTREAM * init_vgmstream_bcstm(STREAMFILE *streamFile) {
vgmstream->num_samples = read_32bitLE(head_offset + 0x2c, streamFile);
vgmstream->sample_rate = (uint16_t)read_16bitLE(head_offset + 0x24, streamFile);
/* channels and loop flag are set by allocate_vgmstream */
vgmstream->loop_start_sample = read_32bitLE(head_offset + 0x28, streamFile);
vgmstream->loop_end_sample = vgmstream->num_samples;
if (ima) //Shift the loop points back slightly to avoid stupid pops in some IMA streams due to DC offsetting
{
vgmstream->loop_start_sample = read_32bitLE(head_offset + 0x28, streamFile);
if (vgmstream->loop_start_sample > 10000)
{
vgmstream->loop_start_sample -= 5000;
vgmstream->loop_end_sample = vgmstream->num_samples - 5000;
}
else
vgmstream->loop_end_sample = vgmstream->num_samples;
}
else
{
vgmstream->loop_start_sample = read_32bitLE(head_offset + 0x28, streamFile);
vgmstream->loop_end_sample = vgmstream->num_samples;
}
vgmstream->coding_type = coding_type;
if (channel_count == 1)
vgmstream->layout_type = layout_none;
else
vgmstream->layout_type = layout_interleave_shortblock;
{
if (ima)
vgmstream->layout_type = layout_interleave;
else
vgmstream->layout_type = layout_interleave_shortblock;
}
vgmstream->meta_type = meta_CSTM;
vgmstream->interleave_block_size = read_32bitLE(head_offset + 0x34, streamFile);
vgmstream->interleave_smallblock_size = read_32bitLE(head_offset + 0x44, streamFile);
if (ima)
vgmstream->interleave_block_size = 0x200;
else {
vgmstream->interleave_block_size = read_32bitLE(head_offset + 0x34, streamFile);
vgmstream->interleave_smallblock_size = read_32bitLE(head_offset + 0x44, streamFile);
}
if (vgmstream->coding_type == coding_NGC_DSP) {
off_t coef_offset;
off_t tempoffset = head_offset;
@ -101,8 +133,13 @@ VGMSTREAM * init_vgmstream_bcstm(STREAMFILE *streamFile) {
}
}
}
start_offset = read_32bitLE(0x30, streamFile) + 0x20;
if (ima) // No SEEK (ADPC) header, so just start where the SEEK header is supposed to be.
start_offset = seek_offset;
else
start_offset = read_32bitLE(0x30, streamFile) + 0x20;
/* open the file for reading by each channel */
{
@ -111,6 +148,9 @@ VGMSTREAM * init_vgmstream_bcstm(STREAMFILE *streamFile) {
if (vgmstream->layout_type == layout_interleave_shortblock)
vgmstream->ch[i].streamfile = streamFile->open(streamFile, filename,
vgmstream->interleave_block_size);
else if (vgmstream->layout_type == layout_interleave)
vgmstream->ch[i].streamfile = streamFile->open(streamFile, filename,
STREAMFILE_DEFAULT_BUFFER_SIZE);
else
vgmstream->ch[i].streamfile = streamFile->open(streamFile, filename,
0x1000);