78 lines
2.7 KiB
C
78 lines
2.7 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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typedef struct {
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int loop_flag;
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int32_t loop_start;
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int32_t loop_end;
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uint32_t file_size;
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mp4_custom_t mp4;
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int type;
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} ktac_header_t;
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/* KTAC - Koei Tecmo custom AAC [Kin'iro no Corda 3 (Vita), Shingeki no Kyojin: Shichi kara no Dasshutsu (3DS), Dynasty Warriors (PS4)] */
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VGMSTREAM* init_vgmstream_ktac(STREAMFILE* sf) {
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#ifdef VGM_USE_FFMPEG
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VGMSTREAM* vgmstream = NULL;
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ktac_header_t ktac = {0};
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/* checks */
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/* .ktac: header id */
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if (!check_extensions(sf,"ktac"))
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goto fail;
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if (!is_id32be(0x00,sf, "KTAC"))
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goto fail;
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/* 0x04: version? (always 1) */
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ktac.file_size = read_u32le(0x08,sf);
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if (ktac.file_size != get_streamfile_size(sf))
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goto fail;
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ktac.mp4.stream_offset = read_u32le(0x0c,sf);
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ktac.mp4.stream_size = read_u32le(0x10,sf);
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ktac.type = read_u32le(0x14,sf);
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ktac.mp4.sample_rate = read_u32le(0x18,sf);
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ktac.mp4.num_samples = read_u32le(0x1c,sf); /* full samples */
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ktac.mp4.channels = read_u16le(0x20,sf);
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ktac.mp4.frame_samples = read_u16le(0x22,sf);
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ktac.mp4.encoder_delay = read_u16le(0x24,sf);
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ktac.mp4.end_padding = read_u16le(0x26,sf);
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ktac.loop_start = read_u32le(0x28,sf);
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ktac.loop_end = read_u32le(0x2c,sf);
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/* 0x30: ? (big, related to loops) */
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/* 0x34: ? (always null) */
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ktac.mp4.table_offset = read_u32le(0x38,sf);
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ktac.mp4.table_entries = read_u32le(0x3c,sf);
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ktac.loop_flag = (ktac.loop_end > 0);
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/* type 1 files crash during sample_copy, wrong fake header/esds?
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* (0=AoT, KnC3 bgm, 1=KnC3 1ch voices, 2=DW4, Atelier Ryza) */
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if (ktac.type == 1)
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goto fail;
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(ktac.mp4.channels, ktac.loop_flag);
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if (!vgmstream) goto fail;
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vgmstream->meta_type = meta_KTAC;
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vgmstream->sample_rate = ktac.mp4.sample_rate;
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vgmstream->num_samples = ktac.mp4.num_samples - ktac.mp4.encoder_delay - ktac.mp4.end_padding;
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vgmstream->loop_start_sample = ktac.loop_start * ktac.mp4.frame_samples - ktac.mp4.encoder_delay;
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vgmstream->loop_end_sample = ktac.loop_end * ktac.mp4.frame_samples - ktac.mp4.encoder_delay;
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/* KTAC uses AAC, but not type found in .aac (that has headered frames, like mp3) but raw
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* packets + frame size table (similar to .mp4/m4a). We set config for FFmpeg's fake M4A header */
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vgmstream->codec_data = init_ffmpeg_mp4_custom_std(sf, &ktac.mp4);
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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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return vgmstream;
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fail:
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close_vgmstream(vgmstream);
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#endif
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return NULL;
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}
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