mirror of
https://github.com/vgmstream/vgmstream.git
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61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* .btsnd - Wii U boot sound file for each game/app */
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VGMSTREAM* init_vgmstream_btsnd(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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int channels, loop_flag;
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off_t start_offset, data_size;
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int32_t num_samples, loop_start;
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/* checks */
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if (!check_extensions(sf, "btsnd"))
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return NULL;
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uint32_t type = read_u32be(0x00,sf);
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if (type == 0x00) {
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loop_flag = 0;
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}
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else if (type == 0x02) {
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loop_flag = 1;
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}
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else {
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return NULL;
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}
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loop_start = read_s32be(0x04, sf); /* non-looping: 0 or some number lower than samples */
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start_offset = 0x08;
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channels = 2;
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/* extra checks since format is so simple */
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data_size = get_streamfile_size(sf);
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num_samples = pcm16_bytes_to_samples(data_size - start_offset, channels);
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if (loop_start >= num_samples)
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return NULL;
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if (num_samples > 960000) /* known max reached by various games, encoder/Wii U limit? */
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return NULL;
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channels, loop_flag);
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if (!vgmstream) goto fail;
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vgmstream->meta_type = meta_BTSND;
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vgmstream->sample_rate = 48000;
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vgmstream->num_samples = num_samples;
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vgmstream->loop_start_sample = loop_start;
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vgmstream->loop_end_sample = vgmstream->num_samples;
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vgmstream->coding_type = coding_PCM16BE;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = 0x02;
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if (!vgmstream_open_stream(vgmstream, sf, 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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