mirror of
https://github.com/vgmstream/vgmstream.git
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55 lines
2.1 KiB
C
55 lines
2.1 KiB
C
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#include "layout.h"
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#include "../coding/coding.h"
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#include "../vgmstream.h"
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/* set up for the block at the given offset */
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void eacs_block_update(off_t block_offset, VGMSTREAM * vgmstream) {
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int i;
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off_t block_size=vgmstream->current_block_size;
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if(read_32bitBE(block_offset,vgmstream->ch[0].streamfile)==0x31534E6C) {
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block_offset+=0x0C;
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}
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vgmstream->current_block_offset = block_offset;
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if(read_32bitBE(block_offset,vgmstream->ch[0].streamfile)==0x31534E64) { /* 1Snd */
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block_offset+=4;
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if(vgmstream->ea_platform==0)
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block_size=read_32bitLE(vgmstream->current_block_offset+0x04,
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vgmstream->ch[0].streamfile);
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else
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block_size=read_32bitBE(vgmstream->current_block_offset+0x04,
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vgmstream->ch[0].streamfile);
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block_offset+=4;
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}
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vgmstream->current_block_size=block_size-8;
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if(vgmstream->coding_type==coding_DVI_IMA) {
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vgmstream->current_block_size=read_32bitLE(block_offset,vgmstream->ch[0].streamfile);
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for(i=0;i<vgmstream->channels;i++) {
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vgmstream->ch[i].adpcm_step_index = read_32bitLE(block_offset+0x04+i*4,vgmstream->ch[0].streamfile);
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vgmstream->ch[i].adpcm_history1_32 = read_32bitLE(block_offset+0x04+i*4+(4*vgmstream->channels),vgmstream->ch[0].streamfile);
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vgmstream->ch[i].offset = block_offset+0x14;
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}
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} else {
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if(vgmstream->coding_type==coding_PSX) {
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for (i=0;i<vgmstream->channels;i++)
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vgmstream->ch[i].offset = vgmstream->current_block_offset+8+(i*(vgmstream->current_block_size/2));
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} else {
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for (i=0;i<vgmstream->channels;i++) {
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if(vgmstream->coding_type==coding_PCM16_int)
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vgmstream->ch[i].offset = block_offset+(i*2);
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else
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vgmstream->ch[i].offset = block_offset+i;
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}
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}
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vgmstream->current_block_size/=vgmstream->channels;
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}
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vgmstream->next_block_offset = vgmstream->current_block_offset +
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(off_t)block_size;
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}
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