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https://github.com/vgmstream/vgmstream.git
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68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* LOPU - French-Bread's Opus [Melty Blood: Type Lumina (Switch)] */
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VGMSTREAM* init_vgmstream_lopu_fb(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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uint32_t start_offset, data_size;
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int loop_flag, channels, sample_rate;
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int32_t num_samples, loop_start, loop_end, skip;
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/* checks */
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if (!is_id32be(0x00, sf, "LOPU"))
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goto fail;
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/* .lopus: real extension (honest) */
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if (!check_extensions(sf, "lopus"))
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goto fail;
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start_offset = read_u32le(0x04, sf);
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sample_rate = read_s32le(0x08, sf);
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channels = read_s16le(0x0c, sf);
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/* 0x10: ? (1984) */
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num_samples = read_s32le(0x14, sf);
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loop_start = read_s32le(0x18, sf);
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loop_end = read_s32le(0x1c, sf) + 1;
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/* 0x20: frame size */
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skip = read_s16le(0x24, sf);
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data_size = read_u32le(0x28, sf);
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/* rest: null */
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loop_flag = (loop_end > 0); /* -1 if no loop */
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/* Must remove skip or some files decode past limit. loop_end equals to PC (.ogg) version's max
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* samples, but in some case (stage_park) goes slightly past max but is still valid.
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* (loops shouldn't remove skip as they wouldn't match PC/bgm.txt loop times) */
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num_samples -= skip;
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if (num_samples < loop_end)
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num_samples = loop_end;
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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_LOPU_FB;
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vgmstream->sample_rate = sample_rate;
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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 = loop_end;
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#ifdef VGM_USE_FFMPEG
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vgmstream->codec_data = init_ffmpeg_switch_opus(sf, start_offset, data_size, vgmstream->channels, skip, vgmstream->sample_rate);
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if (!vgmstream->codec_data) goto fail;
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vgmstream->coding_type = coding_FFmpeg;
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vgmstream->layout_type = layout_none;
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#else
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goto fail;
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#endif
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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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