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pcm support for dreamcast .str

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git-svn-id: https://vgmstream.svn.sourceforge.net/svnroot/vgmstream@423 51a99a44-fe44-0410-b1ba-c3e57ba2b86b
This commit is contained in:
manakoAT 2008-08-21 17:35:19 +00:00
parent 0dec3ff12d
commit b6e2c1249c
1 changed files with 40 additions and 15 deletions
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53
src/meta/dc_str.c
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@ -9,6 +9,7 @@ VGMSTREAM * init_vgmstream_dc_str(STREAMFILE *streamFile) {
int loop_flag = 0;
int channel_count;
int samples;
/* check extension, case insensitive */
streamFile->get_name(streamFile,filename,sizeof(filename));
@ -18,28 +19,52 @@ VGMSTREAM * init_vgmstream_dc_str(STREAMFILE *streamFile) {
if (read_32bitBE(0xD5,streamFile) != 0x53656761) /* "Sega" */
goto fail;
loop_flag = (read_32bitBE(0x00,streamFile)!=0x00000000);
loop_flag = (read_32bitLE(0x00,streamFile)!=0x00000000);
channel_count = read_32bitLE(0x18,streamFile);
samples=read_32bitLE(0x08,streamFile);
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(channel_count,loop_flag);
vgmstream = allocate_vgmstream(channel_count,loop_flag);
if (!vgmstream) goto fail;
/* fill in the vital statistics */
switch (channel_count) {
case 1:
vgmstream->layout_type = layout_none;
break;
case 2:
vgmstream->layout_type = layout_interleave;
vgmstream->interleave_block_size = read_32bitLE(0x0C,streamFile);
break;
default:
goto fail;
}
switch (samples) {
case 4:
vgmstream->coding_type = coding_AICA;
vgmstream->num_samples = read_32bitLE(0x14,streamFile);
if (loop_flag) {
vgmstream->loop_start_sample = 0;
vgmstream->loop_end_sample = read_32bitLE(0x14,streamFile);
}
break;
case 16:
vgmstream->coding_type = coding_PCM16LE;
vgmstream->num_samples = read_32bitLE(0x14,streamFile)/2/channel_count;
if (loop_flag) {
vgmstream->loop_start_sample = 0;
vgmstream->loop_end_sample = read_32bitLE(0x14,streamFile)/2/channel_count;
}
break;
default:
goto fail;
}
vgmstream->channels = channel_count;
start_offset = 0x800;
vgmstream->sample_rate = read_32bitLE(0x04,streamFile);
vgmstream->coding_type = coding_AICA;
vgmstream->interleave_block_size = read_32bitLE(0x0C,streamFile);
vgmstream->num_samples = (read_32bitLE(0x1C,streamFile))*2*vgmstream->interleave_block_size;
if (loop_flag) {
vgmstream->loop_start_sample = 0; /* (read_32bitLE(0x18,streamFile))*2*vgmstream->interleave_block_size; */
vgmstream->loop_end_sample = (read_32bitLE(0x1C,streamFile))*2*vgmstream->interleave_block_size;
}
vgmstream->layout_type = layout_interleave;
vgmstream->meta_type = meta_DC_STR;
vgmstream->meta_type = meta_DC_STR;
/* open the file for reading */