mirror of
https://github.com/vgmstream/vgmstream.git
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70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
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#include "meta.h"
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#include "../coding/coding.h"
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/* XA30 - found in Driver: Parallel Lines (PC) */
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VGMSTREAM * init_vgmstream_pc_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, codec;
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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 should be .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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/* reportedly from XA2WAV those are offset+data from a second stream (not seen) */
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if (read_32bitLE(0x14,streamFile) != 0 || read_32bitLE(0x1c,streamFile) != 0) goto fail;
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loop_flag = 0;
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channel_count = 2; /* 0x04: channels? (always 2 in practice) */
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codec = read_32bitLE(0x0c,streamFile); /* reportedly from XA2WAV (not seen) */
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start_offset = read_32bitLE(0x10,streamFile);
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file_size = get_streamfile_size(streamFile);
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data_size = read_32bitLE(0x18,streamFile);
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if (data_size+start_offset != file_size) goto fail;
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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(0x08,streamFile);
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/* 0x20: always 00016000?, rest of the header is null */
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vgmstream->meta_type = meta_PC_XA30;
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switch(codec) {
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case 0x01: /* MS-IMA variation */
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vgmstream->coding_type = coding_REF_IMA;
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vgmstream->layout_type = layout_none;
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vgmstream->interleave_block_size = read_32bitLE(0x24,streamFile);
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vgmstream->num_samples = ms_ima_bytes_to_samples(data_size, vgmstream->interleave_block_size, channel_count);
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break;
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case 0x00: /* PCM? */
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default:
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goto fail;
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}
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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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