mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-14 07:32:52 +01:00
75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
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#include "meta.h"
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#include "../util.h"
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/* GENH is an artificial "generic" header for headerless streams */
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VGMSTREAM * init_vgmstream_psx_genh(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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int32_t channel_count;
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int32_t interleave;
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int32_t sample_rate;
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int32_t loop_start;
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int32_t loop_end;
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char filename[260];
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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("genh",filename_extension(filename))) goto fail;
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/* check header magic */
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if (read_32bitBE(0x0,streamFile) != 0x47454e48) goto fail;
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/* check format (reserved for now) */
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if (read_32bitLE(0x18,streamFile) != 0) goto fail;
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channel_count = read_32bitLE(0x4,streamFile);
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interleave = read_32bitLE(0x8,streamFile);
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sample_rate = read_32bitLE(0xc,streamFile);
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loop_start = read_32bitLE(0x10,streamFile);
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loop_end = read_32bitLE(0x14,streamFile);
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channel_count,(loop_start!=-1));
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if (!vgmstream) goto fail;
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/* fill in the vital information */
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vgmstream->channels = channel_count;
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vgmstream->sample_rate = sample_rate;
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vgmstream->interleave_block_size = interleave;
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vgmstream->num_samples = loop_end;
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vgmstream->loop_start_sample = loop_start;
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vgmstream->loop_end_sample = loop_end;
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vgmstream->loop_flag = (loop_start != -1);
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vgmstream->coding_type = coding_PSX;
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vgmstream->layout_type = layout_interleave;
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vgmstream->meta_type = meta_PSX_GENH;
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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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if (channel_count > 1)
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vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,interleave);
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else
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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=0x800;
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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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