84 lines
2.7 KiB
C
84 lines
2.7 KiB
C
#include "meta.h"
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#include "../util.h"
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#include "../coding/coding.h"
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#include "../util/chunks.h"
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/* XAU - XPEC Entertainment sound format [Beat Down (PS2/Xbox), Spectral Force Chronicle (PS2)] */
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VGMSTREAM* init_vgmstream_xau(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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off_t start_offset;
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int loop_flag, channels, type, loop_start, loop_end;
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/* check extension */
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if (!is_id32be(0x00,sf, "XAU\0"))
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goto fail;
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if (!check_extensions(sf, "xau"))
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goto fail;
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if (read_32bitLE(0x08,sf) != 0x40) /* header start */
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goto fail;
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/* 0x04: version? (0x100) */
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type = read_32bitBE(0x0c, sf);
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loop_start = read_32bitLE(0x10, sf);
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loop_end = read_32bitLE(0x14, sf);
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loop_flag = (loop_end > 0);
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channels = read_8bit(0x18,sf);
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channels, loop_flag);
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if (!vgmstream) goto fail;
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vgmstream->channels = channels;
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vgmstream->meta_type = meta_XAU;
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/* miniheader over a common header with some tweaks, so we'll simplify parsing */
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switch(type) {
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case 0x50533200: /* "PS2\0" */
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if (read_32bitBE(0x40,sf) != 0x56414770) goto fail; /* mutant "VAGp" (long header size) */
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start_offset = 0x800;
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vgmstream->sample_rate = read_32bitBE(0x50, sf);
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vgmstream->num_samples = ps_bytes_to_samples(read_32bitBE(0x4C,sf) * channels, channels);
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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->coding_type = coding_PSX;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = 0x8000;
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break;
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case 0x58420000: /* "XB\0\0" */
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if (read_32bitBE(0x40,sf) != 0x52494646) goto fail; /* mutant "RIFF" (sometimes wrong RIFF size) */
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/* start offset: find "data" chunk, as sometimes there is a "smpl" chunk at the start or the end (same as loop_start/end) */
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if (!find_chunk_le(sf, 0x64617461, 0x4c, 0, &start_offset, NULL) )
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goto fail;
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vgmstream->sample_rate = read_32bitLE(0x58, sf);
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vgmstream->num_samples = xbox_ima_bytes_to_samples(read_32bitLE(start_offset-4, sf), channels);
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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->coding_type = coding_XBOX_IMA;
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vgmstream->layout_type = layout_none;
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break;
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default:
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goto fail;
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}
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if (!vgmstream_open_stream(vgmstream,sf,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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