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https://github.com/vgmstream/vgmstream.git
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f6417c5430
There is not no real about having small-ish buffers, simplifies buffer tuning, and avoids having gigantic buffers on bad reads.
88 lines
2.5 KiB
C
88 lines
2.5 KiB
C
#include "meta.h"
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#include "../layout/layout.h"
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#include "../util.h"
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VGMSTREAM * init_vgmstream_dsp_bdsp(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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char filename[PATH_LIMIT];
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int channel_count;
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int loop_flag;
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int i;
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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("bdsp",filename_extension(filename))) goto fail;
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channel_count = 2;
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loop_flag = 0;
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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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vgmstream->channels = channel_count;
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vgmstream->sample_rate = read_32bitBE(0x8,streamFile);
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vgmstream->coding_type = coding_NGC_DSP;
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#if 0
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if(loop_flag) {
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vgmstream->loop_start_sample = read_32bitBE(0x64,streamFile);
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vgmstream->loop_end_sample = read_32bitBE(0x68,streamFile);
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}
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#endif
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vgmstream->layout_type = layout_blocked_bdsp;
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vgmstream->interleave_block_size = 0x8;
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vgmstream->meta_type = meta_DSP_BDSP;
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/* open the file for reading by each channel */
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{
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for (i=0;i<channel_count;i++) {
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vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
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if (!vgmstream->ch[i].streamfile) goto fail;
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vgmstream->ch[i].channel_start_offset=
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vgmstream->ch[i].offset=i*vgmstream->interleave_block_size;
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}
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}
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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(0x1C+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(0x7C+i*2,streamFile);
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}
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}
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}
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/* Calc num_samples */
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start_offset = 0x0;
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block_update_bdsp(start_offset,vgmstream);
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vgmstream->num_samples=0;
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do
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{
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vgmstream->num_samples += vgmstream->current_block_size*14/8;
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block_update_bdsp(vgmstream->next_block_offset,vgmstream);
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}
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while (vgmstream->next_block_offset<get_streamfile_size(streamFile));
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block_update_bdsp(start_offset,vgmstream);
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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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