mirror of
https://github.com/vgmstream/vgmstream.git
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a397d17741
git-svn-id: https://vgmstream.svn.sourceforge.net/svnroot/vgmstream@405 51a99a44-fe44-0410-b1ba-c3e57ba2b86b
90 lines
2.7 KiB
C
90 lines
2.7 KiB
C
#include "meta.h"
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#include "../util.h"
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/* PSH (from Dawn of Mana - Seiken Densetsu 4) */
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/* probably Square Vag Stream */
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VGMSTREAM * init_vgmstream_ps2_psh(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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char filename[260];
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off_t start_offset;
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uint8_t testBuffer[0x10];
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off_t loopEnd = 0;
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off_t readOffset = 0;
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size_t fileLength;
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int loop_flag;
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int channel_count;
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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("psh",filename_extension(filename))) goto fail;
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/* check header */
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if (read_16bitBE(0x02,streamFile) != 0x6400)
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goto fail;
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loop_flag = (read_16bitLE(0x06,streamFile)!=0);
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channel_count = 2;
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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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start_offset = 0;
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vgmstream->channels = channel_count;
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vgmstream->sample_rate = (uint16_t)read_16bitLE(0x08,streamFile);
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vgmstream->coding_type = coding_PSX;
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vgmstream->num_samples = (uint16_t)read_16bitLE(0x0C,streamFile)*0x800*28/16/channel_count;
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// loop end is set by the loop marker which we need to find ...
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// there's some extra data on unloop files, so we calculate
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// the sample count with loop marker on this files
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fileLength = get_streamfile_size(streamFile);
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do {
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readOffset+=(off_t)read_streamfile(testBuffer,readOffset,0x10,streamFile);
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// Loop End ...
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if(testBuffer[0x01]==0x03) {
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if(loopEnd==0) loopEnd = readOffset-0x10;
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break;
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}
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} while (streamFile->get_offset(streamFile)<(int32_t)fileLength);
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if(loopEnd!=0)
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vgmstream->num_samples = loopEnd*28/16/channel_count;
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if(loop_flag) {
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vgmstream->loop_start_sample =
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((uint16_t)read_16bitLE(0x06,streamFile)-0x8000)*0x400*28/16;
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vgmstream->loop_end_sample=vgmstream->num_samples;
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}
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = 0x800;
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vgmstream->meta_type = meta_PS2_PSH;
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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+
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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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