59 lines
2.0 KiB
C
59 lines
2.0 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* DCS+WAV - from In Utero games [Evil Twin: Cyprien's Chronicles (DC)] */
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VGMSTREAM * init_vgmstream_dcs_wav(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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STREAMFILE * streamHeader = NULL;
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int loop_flag, channel_count, sample_rate;
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off_t start_offset, fmt_offset;
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/* checks */
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if (!check_extensions(streamFile,"dcs"))
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goto fail;
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streamHeader = open_streamfile_by_ext(streamFile, "wav");
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if (!streamHeader) goto fail;
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/* a slightly funny RIFF */
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if (read_u32be(0x00,streamHeader) != 0x52494646 || /* "RIFF" */
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read_u32be(0x08,streamHeader) != 0x57415645 || /* "WAVE" */
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read_u32be(0x0C,streamHeader) != 0x34582E76 || /* "4X.v" */
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read_u32be(0x3C,streamHeader) != 0x406E616D) /* "@nam" */
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goto fail;
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fmt_offset = 0x44 + read_32bitLE(0x40,streamHeader); /* skip @nam */
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if (fmt_offset % 2) fmt_offset += 1;
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if (read_u32be(fmt_offset,streamHeader) != 0x666D7420) goto fail; /* "fmt " */
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fmt_offset += 0x04+0x04;
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if (read_u16le(fmt_offset+0x00,streamHeader) != 0x0005) goto fail; /* unofficial format */
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channel_count = read_u16le(fmt_offset+0x02,streamHeader);
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sample_rate = read_u32le(fmt_offset+0x04,streamHeader);
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loop_flag = 0;
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start_offset = 0x00;
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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_DCS_WAV;
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vgmstream->sample_rate = sample_rate;
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vgmstream->num_samples = yamaha_bytes_to_samples(get_streamfile_size(streamFile), channel_count);
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vgmstream->coding_type = coding_AICA_int;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = 0x4000;
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if ( !vgmstream_open_stream(vgmstream, streamFile, start_offset) )
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goto fail;
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close_streamfile(streamHeader);
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return vgmstream;
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fail:
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close_streamfile(streamHeader);
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close_vgmstream(vgmstream);
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return NULL;
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}
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