mirror of
https://github.com/vgmstream/vgmstream.git
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76 lines
2.5 KiB
C
76 lines
2.5 KiB
C
#include "meta.h"
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#include "../util.h"
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/* ASD - found in Miss Moonlight (DC) */
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VGMSTREAM * init_vgmstream_dc_asd(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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char filename[PATH_LIMIT];
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off_t start_offset;
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int loop_flag;
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int channel_count;
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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("asd",filename_extension(filename))) goto fail;
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/* We have no "Magic" words in this header format, so we have to do some,
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other checks, it seems the samplecount is stored twice in the header,
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we'll compare it... */
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if (read_32bitLE(0x0,streamFile) != read_32bitLE(0x4,streamFile))
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goto fail;
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/* compare the frequency with the bitrate, if it doesn't match we'll close
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the vgmstream... */
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if (read_32bitLE(0x10,streamFile)/read_32bitLE(0xC,streamFile) != (uint16_t)read_16bitLE(0xA,streamFile)*2)
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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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/* fill in the vital statistics */
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start_offset = get_streamfile_size(streamFile) - read_32bitLE(0x0,streamFile);
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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_PCM16LE;
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vgmstream->num_samples = read_32bitLE(0x0,streamFile)/2/channel_count;
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if (loop_flag) {
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vgmstream->loop_start_sample = 0;
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vgmstream->loop_end_sample = read_32bitLE(0x0,streamFile)/2/channel_count;
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}
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vgmstream->meta_type = meta_DC_ASD;
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if (vgmstream->channels == 1) {
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vgmstream->layout_type = layout_none;
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} else if (vgmstream->channels == 2) {
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = 0x2;
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}
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/* open the file for reading */
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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[i].channel_start_offset=
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vgmstream->ch[i].offset=start_offset+
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vgmstream->interleave_block_size*i;
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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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