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5fe6033442
EA's MT/MicroTalk is not the early version of EAXA as I thought, but a rarely used VBR codec (ex. FIFA 2001/2002 PS2) seemingly related to Westwood VBR ADPCM
51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
#include "meta.h"
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#include "../util.h"
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/* Maxis XA - found in Sim City 3000 (PC) */
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VGMSTREAM * init_vgmstream_maxis_xa(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, i;
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/* check extension, case insensitive */
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if (!check_extensions(streamFile,"xa"))
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goto fail;
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/* check header */
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if ((read_32bitBE(0x00,streamFile) != 0x58414900) && /* "XAI\0" */
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(read_32bitBE(0x00,streamFile) != 0x58414A00)) /* "XAJ\0" (some odd song uses this, no apparent diffs) */
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goto fail;
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loop_flag = 0;
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channel_count = read_16bitLE(0x0A,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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start_offset = 0x18;
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vgmstream->channels = channel_count;
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vgmstream->sample_rate = read_32bitLE(0x0C,streamFile);
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vgmstream->coding_type = coding_MAXIS_XA;
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vgmstream->num_samples = read_32bitLE(0x04,streamFile)/2/channel_count;
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vgmstream->layout_type = layout_none;
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vgmstream->meta_type = meta_MAXIS_XA;
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/* open streams */
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if (!vgmstream_open_stream(vgmstream,streamFile,start_offset))
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goto fail;
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/* fix channel offsets as needed by the codec (could be simplified) */
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for (i = 0; i < channel_count; i++) {
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vgmstream->ch[i].channel_start_offset = start_offset+i;
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vgmstream->ch[i].offset = 0;
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}
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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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