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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.
63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
#include "meta.h"
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#include "../util.h"
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VGMSTREAM * init_vgmstream_gcsw(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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char filename[PATH_LIMIT];
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int channel_count;
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int loop_flag;
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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("gcw",filename_extension(filename))) goto fail;
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/* check header */
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if ((uint32_t)read_32bitBE(0,streamFile)!=0x47435357) /* "GCSW" */
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goto fail;
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/* check type details */
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/* guess */
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loop_flag = read_32bitBE(0x1c,streamFile);
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channel_count = read_32bitBE(0xc,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->num_samples = read_32bitBE(0x10,streamFile);
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vgmstream->sample_rate = read_32bitBE(0x8,streamFile);
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/* channels and loop flag are set by allocate_vgmstream */
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vgmstream->loop_start_sample = read_32bitBE(0x14,streamFile);
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vgmstream->loop_end_sample = read_32bitBE(0x18,streamFile);
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vgmstream->coding_type = coding_PCM16BE;
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vgmstream->layout_type = layout_interleave;
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vgmstream->meta_type = meta_GCSW;
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vgmstream->interleave_block_size = 0x8000;
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/* open the file for reading by each channel */
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{
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int i;
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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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0x20+0x8000*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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