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https://github.com/vgmstream/vgmstream.git
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f6417c5430
There is not no real about having small-ish buffers, simplifies buffer tuning, and avoids having gigantic buffers on bad reads.
71 lines
2.1 KiB
C
71 lines
2.1 KiB
C
#include "meta.h"
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#include "../util.h"
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/* P2BT : Pop'n'Music 7 & 8 Bgm File */
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VGMSTREAM * init_vgmstream_ps2_p2bt(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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char filename[PATH_LIMIT];
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int loop_flag=0;
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int channel_count;
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off_t start_offset;
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int i;
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/* check extension, case insensitive */
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streamFile->get_name(streamFile,filename,sizeof(filename));
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if (strcasecmp("p2bt",filename_extension(filename))) goto fail;
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if((read_32bitBE(0x00,streamFile)!=0x4d4F5645) && // MOVE
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(read_32bitBE(0x00,streamFile)!=0x50324254)) // P2BT
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goto fail;
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/* check loop */
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loop_flag = (read_32bitLE(0x0C,streamFile)!=0);
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channel_count=read_32bitLE(0x20,streamFile);
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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(0x08,streamFile);;
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/* Check for Compression Scheme */
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vgmstream->coding_type = coding_PSX;
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vgmstream->num_samples = read_32bitLE(0x10,streamFile)/16*28/vgmstream->channels;
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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(0x0C,streamFile)/16*28/vgmstream->channels;
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vgmstream->loop_end_sample = vgmstream->num_samples;
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}
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vgmstream->interleave_block_size = read_32bitLE(0x14,streamFile);;
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vgmstream->layout_type = layout_interleave;
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vgmstream->meta_type = meta_PS2_P2BT;
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start_offset = (off_t)0x800;
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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 = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_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)(start_offset+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 (vgmstream) close_vgmstream(vgmstream);
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return NULL;
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}
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