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64 lines
2.0 KiB
C
64 lines
2.0 KiB
C
#include "meta.h"
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#include "../util.h"
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/* JSTM (.STM (renamed .JSTM) from Tantei Jinguji Saburo - Kind of Blue) */
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VGMSTREAM * init_vgmstream_ps2_jstm(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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off_t start_offset = 0x20;
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int loop_flag;
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int channel_count;
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char filename[PATH_LIMIT];
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/* check extension */
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streamFile->get_name(streamFile,filename,sizeof(filename));
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if (strcasecmp("stm",filename_extension(filename)) &&
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strcasecmp("jstm",filename_extension(filename))) goto fail;
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/* check header (JSTM) */
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if (read_32bitBE(0x0,streamFile) != 0x4A53544D) goto fail;
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loop_flag = (read_32bitLE(0x14,streamFile) != 0);
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channel_count = read_16bitLE(0x4,streamFile);
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// hmm, don't know what 6 is, one is probably bytes per sample and the
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// other is channels, but who can say?
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if (channel_count != read_16bitLE(0x6,streamFile)) goto fail;
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vgmstream = allocate_vgmstream(channel_count,loop_flag);
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if (!vgmstream) goto fail;
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/* fill in the statistics vitale */
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vgmstream->sample_rate = read_32bitLE(0x8,streamFile);
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vgmstream->coding_type = coding_PCM16LE_XOR_int;
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vgmstream->num_samples = read_32bitLE(0xC,streamFile)/2/channel_count;
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vgmstream->layout_type = layout_none;
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vgmstream->meta_type = meta_PS2_JSTM;
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if (loop_flag) {
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vgmstream->loop_start_sample=read_32bitLE(0x14,streamFile)/2/channel_count;
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vgmstream->loop_end_sample=vgmstream->num_samples;
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}
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/* open the file for reading */
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{
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int i;
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STREAMFILE * file;
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file = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
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if (!file) goto fail;
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for (i=0; i < channel_count; i++) {
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vgmstream->ch[i].streamfile = file;
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vgmstream->ch[i].channel_start_offset =
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vgmstream->ch[i].offset = start_offset + 2*i;
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vgmstream->ch[i].key_xor = 0x5A5A;
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}
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}
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return vgmstream;
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fail:
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if (vgmstream) close_vgmstream(vgmstream);
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return NULL;
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}
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