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51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
#include "meta.h"
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/* IVAG - Namco header (from NUS3) [THE iDOLM@STER 2 (PS3), THE iDOLM@STER: Gravure For You! (PS3)] */
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VGMSTREAM * init_vgmstream_ivag(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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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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/* checks */
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/* .ivag: header id (since format can't be found outside NUS3) */
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if (!check_extensions(streamFile, "ivag"))
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goto fail;
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if (read_32bitBE(0x00,streamFile) != 0x49564147) /* "IVAG" */
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goto fail;
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/* 0x04: null */
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channel_count = read_32bitBE(0x08, streamFile);
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loop_flag = (read_32bitBE(0x18, streamFile) != 0);
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/* skip VAGp headers per channel (size 0x40) */
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start_offset = 0x40 + (0x40 * channel_count);
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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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vgmstream->meta_type = meta_IVAG;
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vgmstream->sample_rate = read_32bitBE(0x0C,streamFile);
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vgmstream->num_samples = read_32bitBE(0x10,streamFile);
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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_PSX;
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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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if (!vgmstream_open_stream(vgmstream,streamFile,start_offset))
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goto fail;
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return vgmstream;
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fail:
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close_vgmstream(vgmstream);
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return NULL;
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}
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