mirror of
https://github.com/vgmstream/vgmstream.git
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53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
#include <math.h>
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#include "meta.h"
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#include "../util.h"
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/* DTK - headerless Nintendo GC DTK file [Harvest Moon: Another Wonderful Life (GC), XGRA (GC)] */
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VGMSTREAM * init_vgmstream_ngc_adpdtk(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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off_t start_offset;
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int channel_count, loop_flag;
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/* checks */
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/* .dtk: standard [XGRA (GC)], .adp: standard [Harvest Moon AWL (GC)], .wav/lwav: Alien Hominid (GC) */
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if ( !check_extensions(streamFile,"dtk,adp,wav,lwav"))
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goto fail;
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/* check valid frames as files have no header, and .adp/wav are common */
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{
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int i;
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for (i = 0; i < 10; i++) { /* try a bunch of frames */
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if (read_8bit(0x00 + i*0x20,streamFile) != read_8bit(0x02 + i*0x20,streamFile) ||
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read_8bit(0x01 + i*0x20,streamFile) != read_8bit(0x03 + i*0x20,streamFile))
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goto fail;
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/* header 0x00/01 are repeated in 0x02/03 (for error correction?),
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* could also test header values (upper nibble should be 0..3, and lower nibble 0..C) */
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}
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}
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/* always stereo, no loop (since it's hardware-decoded and streamed) */
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channel_count = 2;
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loop_flag = 0;
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start_offset = 0x00;
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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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vgmstream->num_samples = get_streamfile_size(streamFile) / 0x20 * 28;
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vgmstream->sample_rate = 48000; /* due to a GC hardware defect this may be closer to 48043 */
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vgmstream->coding_type = coding_NGC_DTK;
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vgmstream->layout_type = layout_none;
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vgmstream->meta_type = meta_NGC_ADPDTK;
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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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