mirror of
https://github.com/vgmstream/vgmstream.git
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86 lines
2.8 KiB
C
86 lines
2.8 KiB
C
#include "meta.h"
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#include "../util.h"
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#include "../coding/coding.h"
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/* ADS - from Gauntlet Dark Legacy (GC/Xbox) */
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VGMSTREAM * init_vgmstream_ads(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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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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int identifer_byte;
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/* check extension, case insensitive */
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if (!check_extensions(streamFile,"ads")) goto fail;
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/* check dhSS Header */
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if (read_32bitBE(0x00,streamFile) != 0x64685353)
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goto fail;
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/* check dbSS Header */
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if (read_32bitBE(0x20,streamFile) != 0x64625353)
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goto fail;
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loop_flag = 1;
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channel_count = read_32bitBE(0x10,streamFile);
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if (channel_count > 0x2)
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goto fail;
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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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identifer_byte = read_32bitBE(0x08,streamFile);
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switch (identifer_byte) {
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case 0x00000020: /* GC */
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start_offset = 0x28 + 0x60 * channel_count;
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vgmstream->channels = channel_count;
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vgmstream->sample_rate = read_32bitBE(0x0c,streamFile);
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vgmstream->coding_type = coding_NGC_DSP;
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vgmstream->num_samples = read_32bitBE(0x28,streamFile);
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if (loop_flag) {
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vgmstream->loop_start_sample = 0;
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vgmstream->loop_end_sample = vgmstream->num_samples;
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}
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if (channel_count == 1){
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vgmstream->layout_type = layout_none;
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} else if (channel_count == 2){
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = read_32bitBE(0x14,streamFile);
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}
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dsp_read_coefs_be(vgmstream, streamFile, 0x44,0x60);
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break;
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case 0x00000021: /* Xbox */
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start_offset = 0x28;
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vgmstream->channels = channel_count;
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vgmstream->sample_rate = read_32bitBE(0x0c,streamFile);
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vgmstream->coding_type = coding_XBOX_int;
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vgmstream->num_samples = (read_32bitBE(0x24,streamFile) / 36 *64 / vgmstream->channels)-64; // to avoid the "pop" at the loop point
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vgmstream->layout_type = channel_count == 1 ? layout_none : layout_interleave;
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vgmstream->interleave_block_size = 0x24;
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if (loop_flag) {
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vgmstream->loop_start_sample = 0;
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vgmstream->loop_end_sample = vgmstream->num_samples;
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}
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break;
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default:
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goto fail;
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}
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vgmstream->meta_type = meta_ADS;
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if (!vgmstream_open_stream(vgmstream, streamFile, start_offset))
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goto fail;
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return vgmstream;
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fail:
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close_vgmstream(vgmstream);
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return NULL;
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}
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