mirror of
https://github.com/vgmstream/vgmstream.git
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87 lines
2.2 KiB
C
87 lines
2.2 KiB
C
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#include "meta.h"
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#include "../util.h"
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/* IVAG
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- The Idolm@ster: Gravure For You! Vol. 3 (PS3)
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Appears to be two VAGp streams interleaved.
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*/
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VGMSTREAM * init_vgmstream_ps3_ivag(STREAMFILE *streamFile)
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{
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VGMSTREAM * vgmstream = NULL;
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char filename[260];
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size_t fileLength;
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off_t readOffset = 0;
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off_t start_offset;
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int loop_flag = 0;
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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("ivag",filename_extension(filename))) goto fail;
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/* check header */
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if (read_32bitBE(0x00,streamFile) != 0x49564147) // "IVAG"
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goto fail;
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// channel count
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channel_count = read_32bitBE(0x08, streamFile);
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// header size
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start_offset = 0x40 + (0x40 * channel_count);
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// loop flag
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if ((read_32bitBE(0x14, streamFile) != 0 ||
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(read_32bitBE(0x18, streamFile) != 0)))
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{
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loop_flag = 1;
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}
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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_32bitBE(0x0C,streamFile);
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vgmstream->coding_type = coding_PSX;
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vgmstream->num_samples = read_32bitBE(0x10,streamFile);
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if (loop_flag)
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{
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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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}
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = read_32bitBE(0x1C,streamFile);
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vgmstream->meta_type = meta_PS3_IVAG;
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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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{
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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 + (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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