mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-19 18:05:52 +01:00
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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/* .NAAC - from Namco 3DS games (Ace Combat - Assault Horizon Legacy, Taiko no Tatsujin Don to Katsu no Jikuu Daibouken) */
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VGMSTREAM* init_vgmstream_naac(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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off_t start_offset;
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int loop_flag, channels, skip_samples;
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size_t data_size;
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/* checks */
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if (!check_extensions(sf,"naac"))
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goto fail;
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if (read_u32be(0x00,sf) != 0x41414320) /* "AAC " */
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goto fail;
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if (read_u32le(0x04,sf) != 0x01) /* version? */
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goto fail;
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start_offset = 0x1000;
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loop_flag = (read_s32le(0x18,sf) != 0);
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channels = read_s32le(0x08,sf);
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skip_samples = 1024; /* raw AAC doesn't set this */
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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->sample_rate = read_s32le(0x0c,sf);
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vgmstream->num_samples = read_s32le(0x10,sf); /* without skip_samples */
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vgmstream->loop_start_sample = read_s32le(0x14,sf); /* with skip_samples */
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vgmstream->loop_end_sample = read_s32le(0x18,sf) + 1; /* without skip_samples */
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/* 0x1c: loop start offset */
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/* 0x20: loop end offset (within data) */
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data_size = read_u32le(0x24,sf);
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/* 0x28: unknown */
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/* 0x2c: table start offset? */
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/* 0x30: seek table (always 0xFD0, padded) */
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vgmstream->meta_type = meta_NAAC;
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#ifdef VGM_USE_FFMPEG
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{
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vgmstream->codec_data = init_ffmpeg_aac(sf, start_offset, data_size, skip_samples);
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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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/* observed default, some files start without silence though seems correct when loop_start=0 */
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vgmstream->num_samples -= skip_samples;
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vgmstream->loop_end_sample -= skip_samples;
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/* for some reason last frame is ignored/bugged in various decoders (gives EOF errors) */
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}
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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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