58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* 2DX9 - from Konami arcade games [beatmaniaIIDX16: EMPRESS (AC), BeatStream (AC), REFLEC BEAT (AC)] */
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VGMSTREAM * init_vgmstream_2dx9(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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off_t start_offset;
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int channel_count, loop_flag;
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/* checks */
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if (!check_extensions(streamFile, "2dx9"))
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goto fail;
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/* check header */
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if (read_32bitBE(0x00,streamFile) != 0x32445839) /* 2DX9 */
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goto fail;
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if (read_32bitBE(0x18,streamFile) != 0x52494646) /* RIFF */
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goto fail;
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if (read_32bitBE(0x20,streamFile) != 0x57415645) /* WAVE */
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goto fail;
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if (read_32bitBE(0x24,streamFile) != 0x666D7420) /* fmt */
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goto fail;
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if (read_32bitBE(0x6a,streamFile) != 0x64617461) /* data */
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goto fail;
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/* IIDX 13 has a false flag for looping files. Konami, pls. */
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loop_flag = (read_16bitLE(0x0e,streamFile) > -1);
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channel_count = read_16bitLE(0x2e,streamFile);
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start_offset = 0x72;
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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_2DX9;
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vgmstream->sample_rate = read_32bitLE(0x30,streamFile);
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vgmstream->num_samples = read_32bitLE(0x66,streamFile);
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if (loop_flag) {
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vgmstream->loop_start_sample = 0;
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vgmstream->loop_end_sample = vgmstream->num_samples;
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}
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vgmstream->coding_type = coding_MSADPCM;
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vgmstream->layout_type = layout_none;
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vgmstream->frame_size = read_16bitLE(0x38,streamFile);
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if (!msadpcm_check_coefs(streamFile, 0x40))
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goto fail;
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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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