111 lines
4.3 KiB
C
111 lines
4.3 KiB
C
#include "layout.h"
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#include "../coding/coding.h"
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/* EA-style blocks */
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void block_update_ea_swvr(off_t block_offset, VGMSTREAM * vgmstream) {
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STREAMFILE* streamFile = vgmstream->ch[0].streamfile;
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int i;
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size_t block_size, header_size = 0, channel_size = 0, interleave = 0;
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uint32_t block_id;
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int32_t (*read_32bit)(off_t,STREAMFILE*) = vgmstream->codec_endian ? read_32bitBE : read_32bitLE;
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int16_t (*read_16bit)(off_t,STREAMFILE*) = vgmstream->codec_endian ? read_16bitBE : read_16bitLE;
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block_id = read_32bit(block_offset+0x00, streamFile);
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block_size = read_32bit(block_offset+0x04, streamFile);
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/* parse blocks (Freekstyle uses multiblocks) */
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switch(block_id) {
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case 0x5641474D: /* "VAGM" */
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if (read_16bit(block_offset+0x1a, streamFile) == 0x0024) {
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header_size = 0x40;
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channel_size = (block_size - header_size) / vgmstream->channels;
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/* ignore blocks of other subsongs */
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{
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int target_subsong = vgmstream->stream_index ? vgmstream->stream_index : 1;
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if (read_32bit(block_offset+0x0c, streamFile)+1 != target_subsong) {
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channel_size = 0;
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}
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}
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} else {
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header_size = 0x1c;
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channel_size = (block_size - header_size) / vgmstream->channels;
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}
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break;
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case 0x56414742: /* "VAGB" */
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if (read_16bit(block_offset+0x1a, streamFile) == 0x6400) {
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header_size = 0x40;
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} else {
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header_size = 0x18;
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}
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channel_size = (block_size - header_size) / vgmstream->channels;
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break;
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case 0x4453504D: /* "DSPM" */
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header_size = 0x60;
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channel_size = (block_size - header_size) / vgmstream->channels;
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/* ignore blocks of other subsongs */
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{
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int target_subsong = vgmstream->stream_index ? vgmstream->stream_index : 1;
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if (read_32bit(block_offset+0x0c, streamFile)+1 != target_subsong) {
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channel_size = 0;
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}
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}
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dsp_read_coefs_be(vgmstream, streamFile, block_offset+0x1a, 0x22);
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//todo adpcm history?
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break;
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case 0x44535042: /* "DSPB" */
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header_size = 0x40;
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channel_size = (block_size - header_size) / vgmstream->channels;
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dsp_read_coefs_be(vgmstream, streamFile, block_offset+0x18, 0x00);
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//todo adpcm history?
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break;
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case 0x4D534943: /* "MSIC" */
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header_size = 0x1c;
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channel_size = (block_size - header_size) / vgmstream->channels;
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break;
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case 0x53484F43: /* "SHOC" (a generic block but hopefully has PC sounds) */
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if (read_32bit(block_offset+0x10, streamFile) == 0x53444154) { /* "SDAT" */
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header_size = 0x14;
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channel_size = (block_size - header_size) / vgmstream->channels;
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}
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else {
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header_size = 0;
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channel_size = 0;
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}
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break;
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case 0x46494C4C: /* "FILL" (FILLs do that up to a block size, but near end don't actually have size) */
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if ((block_offset + 0x04) % 0x6000 == 0)
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block_size = 0x04;
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else if ((block_offset + 0x04) % 0x10000 == 0)
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block_size = 0x04;
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else if (block_size > 0x100000) { /* other unknown block sizes */
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VGM_LOG("EA SWVR: bad block size at 0x%lx\n", block_offset);
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block_size = 0x04;
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}
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header_size = 0x08;
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break;
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case 0xFFFFFFFF:
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channel_size = -1; /* signal bad block */
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break;
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default: /* ignore, 0 samples */
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//;VGM_LOG("EA SWVR: ignored 0x%08x at 0x%lx\n", block_id, block_offset);
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break;
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}
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vgmstream->current_block_size = channel_size;
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vgmstream->current_block_offset = block_offset;
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vgmstream->next_block_offset = block_offset + block_size;
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interleave = vgmstream->coding_type == coding_PCM8_U_int ? 0x1 : channel_size;
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for (i = 0; i < vgmstream->channels; i++) {
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vgmstream->ch[i].offset = block_offset + header_size + interleave*i;
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}
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}
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