mirror of
https://github.com/vgmstream/vgmstream.git
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106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
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#include "../vgmstream.h"
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#ifdef VGM_USE_G7221
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#include "meta.h"
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#include "../util.h"
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#include "../coding/coding.h"
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/* .s14 and .sss - from Idolm@ster DS (and others?)
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* Raw 24kbit Siren 14 stream, s14 is mono and sss is
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* frame-interleaved stereo
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*/
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VGMSTREAM * init_vgmstream_s14_sss(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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char filename[260];
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int channel_count;
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size_t file_size;
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/* check extension, case insensitive */
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/* this is all we have to go on, rsf is completely headerless */
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streamFile->get_name(streamFile,filename,sizeof(filename));
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if (!strcasecmp("sss",filename_extension(filename)))
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{
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channel_count = 2;
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}
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else if (!strcasecmp("s14",filename_extension(filename)))
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{
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channel_count = 1;
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}
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else
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{
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goto fail;
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}
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file_size = get_streamfile_size(streamFile);
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channel_count,0);
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if (!vgmstream) goto fail;
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/* fill in the vital statistics */
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vgmstream->num_samples = file_size/0x3c/channel_count*(32000/50);
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vgmstream->sample_rate = 32768;
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vgmstream->coding_type = coding_G7221C;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = 0x3c;
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if (1 == channel_count)
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{
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vgmstream->meta_type = meta_S14;
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}
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else
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{
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vgmstream->meta_type = meta_SSS;
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}
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{
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int i;
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g7221_codec_data *data;
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/* one data structure per channel */
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data = malloc(sizeof(g7221_codec_data) * channel_count);
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if (!data)
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{
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goto fail;
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}
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memset(data,0,sizeof(g7221_codec_data) * channel_count);
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vgmstream->codec_data = data;
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for (i = 0; i < channel_count; i++)
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{
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/* Siren 14 == 14khz bandwidth */
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data[i].handle = g7221_init(vgmstream->interleave_block_size, 14000);
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if (!data[i].handle)
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{
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goto fail; /* close_vgmstream is able to clean up */
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}
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}
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}
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/* open the file for reading by each channel */
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{
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int i;
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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=0x3c*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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#endif
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