94 lines
3.0 KiB
C
94 lines
3.0 KiB
C
#include "meta.h"
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#include "../util.h"
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/* ZWDSP (hcs' custom DSP files from Zack & Wiki) */
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VGMSTREAM * init_vgmstream_zwdsp(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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char filename[PATH_LIMIT];
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int second_channel_start;
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int loop_flag;
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int channel_count = 2;
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off_t start_offset;
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/* check extension, case insensitive */
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streamFile->get_name(streamFile,filename,sizeof(filename));
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if (strcasecmp("zwdsp",filename_extension(filename))) goto fail;
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/* check header */
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if (read_32bitBE(0x00,streamFile) != 0x00000000) /* 0x0 */
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goto fail;
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/* Retrieve the loop flag, some files have 0x0 and some 0x02 as "no loop" */
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switch (read_32bitBE(0x10, streamFile)) {
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case 0:
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case 2:
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loop_flag = 0;
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break;
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default:
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loop_flag = 1;
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}
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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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/* fill in the vital statistics */
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start_offset = 0x90;
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vgmstream->channels = channel_count;
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vgmstream->sample_rate = read_32bitBE(0x08,streamFile);
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vgmstream->coding_type = coding_NGC_DSP;
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vgmstream->num_samples = read_32bitBE(0x18,streamFile)*14/8/channel_count;
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if (loop_flag) {
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vgmstream->loop_start_sample = read_32bitBE(0x10,streamFile)*14/8/channel_count;
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vgmstream->loop_end_sample = read_32bitBE(0x14,streamFile)*14/8/channel_count;
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// frequently end sample is one more than total samples in file
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if (vgmstream->loop_end_sample > vgmstream->num_samples)
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{
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vgmstream->loop_end_sample = vgmstream->num_samples;
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}
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}
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vgmstream->layout_type = layout_none;
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vgmstream->meta_type = meta_ZWDSP;
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if (vgmstream->coding_type == coding_NGC_DSP) {
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int i;
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for (i=0;i<16;i++) {
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vgmstream->ch[0].adpcm_coef[i] = read_16bitBE(0x20+i*2,streamFile);
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}
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if (vgmstream->channels == 2) {
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for (i=0;i<16;i++) {
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vgmstream->ch[1].adpcm_coef[i] = read_16bitBE(0x60+i*2,streamFile);
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}
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}
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}
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second_channel_start = (get_streamfile_size(streamFile)+start_offset)/2;
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{
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int i;
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STREAMFILE * file;
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file = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
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if (!file) goto fail;
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for (i=0;i<channel_count;i++) {
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vgmstream->ch[i].streamfile = file;
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vgmstream->ch[0].channel_start_offset=start_offset;
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if (channel_count == 2) {
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if (second_channel_start == -1) goto fail;
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vgmstream->ch[1].channel_start_offset=second_channel_start;
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}
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vgmstream->ch[i].offset = vgmstream->ch[i].channel_start_offset;
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}
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}
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return vgmstream;
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/* clean up anything we may have opened */
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fail:
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if (vgmstream) close_vgmstream(vgmstream);
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return NULL;
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}
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