mirror of
https://github.com/vgmstream/vgmstream.git
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82 lines
2.3 KiB
C
82 lines
2.3 KiB
C
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#include "meta.h"
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#include "../util.h"
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/* MIC
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PS2 MIC format is an interleaved format found in most of KOEI Games
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The header always start the long value 0x800 which is the start
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of the BGM datas.
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2008-05-15 - Fastelbja : First version ...
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*/
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VGMSTREAM * init_vgmstream_ps2_mic(const char * const filename) {
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VGMSTREAM * vgmstream = NULL;
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STREAMFILE * infile = NULL;
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int loop_flag=0;
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int channel_count;
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int i;
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/* check extension, case insensitive */
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if (strcasecmp("mic",filename_extension(filename))) goto fail;
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/* try to open the file for header reading */
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infile = open_streamfile(filename);
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if (!infile) goto fail;
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/* check EXST Header */
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if (read_32bitLE(0x00,infile) != 0x800)
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goto fail;
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/* check loop */
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loop_flag = (read_32bitLE(0x14,infile)!=1);
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channel_count=read_32bitLE(0x08,infile);
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/* build the VGMSTREAM */
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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 vital statistics */
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vgmstream->channels = channel_count;
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vgmstream->sample_rate = read_32bitLE(0x04,infile);
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/* Compression Scheme */
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vgmstream->coding_type = coding_PSX;
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vgmstream->num_samples = read_32bitLE(0x10,infile)*14*channel_count;
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/* Get loop point values */
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if(vgmstream->loop_flag) {
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vgmstream->loop_start_sample = read_32bitLE(0x14,infile)*14*channel_count;
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vgmstream->loop_end_sample = read_32bitLE(0x10,infile)*14*channel_count;
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}
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vgmstream->interleave_block_size = read_32bitLE(0x0C,infile);
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vgmstream->layout_type = layout_interleave;
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vgmstream->meta_type = meta_PS2_MIC;
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close_streamfile(infile); infile=NULL;
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/* open the file for reading by each channel */
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{
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for (i=0;i<channel_count;i++) {
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vgmstream->ch[i].streamfile = open_streamfile_buffer(filename,vgmstream->interleave_block_size);
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if (!vgmstream->ch[i].streamfile) goto fail;
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vgmstream->ch[i].channel_start_offset=
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vgmstream->ch[i].offset=
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(off_t)(0x800+vgmstream->interleave_block_size*i);
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}
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}
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return vgmstream;
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/* clean up anything we may have opened */
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fail:
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if (infile) close_streamfile(infile);
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if (vgmstream) close_vgmstream(vgmstream);
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return NULL;
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}
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