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76 lines
2.9 KiB
C
76 lines
2.9 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* XA30 - found in Reflections games [Driver: Parallel Lines (PC), Driver 3 (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 stream_size;
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int total_subsongs, target_subsong = streamFile->stream_index;
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/* check extension, case insensitive */
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/* ".xa30/e4x" is just the ID, the real filename should be .XA */
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if (!check_extensions(streamFile,"xa,xa30,e4x"))
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goto fail;
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/* check header */
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if (read_32bitBE(0x00,streamFile) != 0x58413330 && /* "XA30" [Driver: Parallel Lines (PC)]*/
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read_32bitBE(0x00,streamFile) != 0x65347892) /* "e4x\92" [Driver 3 (PC)]*/
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goto fail;
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if (read_32bitLE(0x04,streamFile) != 2) /* channels?, also extra check to avoid PS2/PC XA30 mixup */
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goto fail;
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total_subsongs = read_32bitLE(0x14,streamFile) != 0 ? 2 : 1; /* second stream offset (only in Driver 3) */
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if (target_subsong == 0) target_subsong = 1;
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if (target_subsong < 0 || target_subsong > total_subsongs || total_subsongs < 1) 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);
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start_offset = read_32bitLE(0x10 + 0x04*(target_subsong-1),streamFile);
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stream_size = read_32bitLE(0x18 + 0x04*(target_subsong-1),streamFile);
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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 IMA=00016000, PCM=00056000 PCM?, rest of the header is null */
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vgmstream->num_streams = total_subsongs;
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vgmstream->stream_size = stream_size;
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vgmstream->meta_type = meta_PC_XA30;
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switch(codec) {
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case 0x00: /* PCM (rare, seen in Driver 3) */
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vgmstream->coding_type = coding_PCM16LE;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = read_32bitLE(0x24,streamFile) / 2;
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vgmstream->num_samples = pcm_bytes_to_samples(stream_size, channel_count, 16);
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break;
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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(stream_size, vgmstream->interleave_block_size, channel_count);
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break;
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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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