mirror of
https://github.com/vgmstream/vgmstream.git
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89 lines
2.8 KiB
C
89 lines
2.8 KiB
C
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#include "meta.h"
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#include "../util.h"
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/* SVAG
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PS2 SVAG format is an interleaved format found in many konami Games
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The header start with a Svag id and have the sentence :
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"ALL RIGHTS RESERVED.KONAMITYO Sound Design Dept. "
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or "ALL RIGHTS RESERVED.KCE-Tokyo Sound Design Dept. "
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2008-05-13 - Fastelbja : First version ...
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Thx to HCS for his awesome work on shortblock interleave
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*/
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VGMSTREAM * init_vgmstream_ps2_svag(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("svag",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 SVAG Header */
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if (read_32bitBE(0x00,infile) != 0x53766167)
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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_16bitLE(0x0C,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 = read_16bitLE(0x0C,infile);
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vgmstream->sample_rate = read_32bitLE(0x08,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(0x04,infile)/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(0x18,infile)/16*28;
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vgmstream->loop_end_sample = read_32bitLE(0x04,infile)/16*28/vgmstream->channels;
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}
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vgmstream->interleave_block_size = read_32bitLE(0x10,infile);
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/* There's no value on header to get the smallblock_size length */
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/* so we add to calculate it based upon the file length, which can broke things */
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/* with bad ripped stuff ... */
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vgmstream->interleave_smallblock_size = ((get_streamfile_size(infile)-0x800)%(2*vgmstream->interleave_block_size))/2;
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vgmstream->layout_type = layout_interleave_shortblock;
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vgmstream->meta_type = meta_PS2_SVAG;
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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,0x8000);
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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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