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56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* XA30 - found in Driver: Parallel Lines (PS2) */
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VGMSTREAM * init_vgmstream_ps2_xa30(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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off_t start_offset;
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int loop_flag, channel_count;
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size_t file_size, data_size;
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/* check extension, case insensitive */
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/* ".xa30" is just the ID, the real filename inside the file uses .XA */
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if (!check_extensions(streamFile,"xa,xa30"))
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goto fail;
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/* check header */
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if (read_32bitBE(0x00,streamFile) != 0x58413330) /* "XA30" */
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goto fail;
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if (read_32bitLE(0x04,streamFile) <= 2) goto fail; /* extra check to avoid PS2/PC XA30 mixup */
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loop_flag = 0;
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channel_count = 1 ; /* 0x08(2): interleave? 0x0a(2): channels? (always 1 in practice) */
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start_offset = read_32bitLE(0x0C,streamFile);
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file_size = get_streamfile_size(streamFile);
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data_size = read_32bitLE(0x14,streamFile); /* always off by 0x800 */
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if (data_size-0x0800 != file_size) goto fail;
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data_size = file_size - start_offset;
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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->sample_rate = read_32bitLE(0x04,streamFile);
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vgmstream->num_samples = ps_bytes_to_samples(data_size,channel_count); /* 0x10: some num_samples value (but smaller) */
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vgmstream->coding_type = coding_PSX;
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vgmstream->layout_type = layout_none;
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vgmstream->meta_type = meta_PS2_XA30;
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/* the rest of the header has unknown values (and several repeats) and the filename */
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/* open the file for reading */
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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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