84 lines
3.0 KiB
C
84 lines
3.0 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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#include "kma9_streamfile.h"
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/* KMA9 - Koei Tecmo's interleaved ATRAC9 [Nobunaga no Yabou - Souzou (Vita)] */
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VGMSTREAM * init_vgmstream_kma9(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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STREAMFILE* temp_streamFile = NULL;
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off_t start_offset;
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size_t stream_size, interleave;
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int loop_flag, channel_count;
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int total_subsongs = 0, target_subsong = streamFile->stream_index;
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/* checks */
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if ( !check_extensions(streamFile,"km9") )
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goto fail;
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if (read_32bitBE(0x00,streamFile) != 0x4B4D4139) /* "KMA9" */
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goto fail;
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start_offset = read_32bitLE(0x04,streamFile);
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channel_count = read_16bitLE(0x32,streamFile);
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loop_flag = (read_32bitLE(0x28,streamFile) != 0);
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total_subsongs = read_32bitLE(0x08,streamFile);
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if (target_subsong == 0) target_subsong = 1;
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if (target_subsong < 0 || target_subsong > total_subsongs || total_subsongs < 1) goto fail;
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/* 0x0c: unknown */
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interleave = read_32bitLE(0x10,streamFile); /* 1 superframe */
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stream_size = read_32bitLE(0x14,streamFile); /* per subsong */
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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->sample_rate = read_32bitLE(0x34,streamFile);
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vgmstream->num_samples = read_32bitLE(0x18,streamFile); /* without skip_samples? */
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vgmstream->loop_start_sample = read_32bitLE(0x24,streamFile); /* with skip_samples? */
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vgmstream->loop_end_sample = vgmstream->num_samples; /* 0x28 looks like end samples but isn't, no idea */
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vgmstream->num_streams = total_subsongs;
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vgmstream->stream_size = stream_size;
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vgmstream->meta_type = meta_KMA9;
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#ifdef VGM_USE_ATRAC9
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{
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atrac9_config cfg = {0};
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cfg.channels = vgmstream->channels;
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cfg.encoder_delay = read_32bitLE(0x20,streamFile);
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cfg.config_data = read_32bitBE(0x5c,streamFile);
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vgmstream->codec_data = init_atrac9(&cfg);
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if (!vgmstream->codec_data) goto fail;
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vgmstream->coding_type = coding_ATRAC9;
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vgmstream->layout_type = layout_none;
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if (loop_flag) { /* seems correct but must double check */
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vgmstream->loop_start_sample -= cfg.encoder_delay;
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//vgmstream->loop_end_sample -= cfg.encoder_delay;
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}
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/* KMA9 interleaves one ATRAC9 frame per subsong */
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temp_streamFile = setup_kma9_streamfile(streamFile, start_offset, stream_size, interleave, (target_subsong-1), total_subsongs);
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if (!temp_streamFile) goto fail;
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start_offset = 0;
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}
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#else
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goto fail;
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#endif
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/* open the file for reading */
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if ( !vgmstream_open_stream(vgmstream, temp_streamFile, start_offset) )
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goto fail;
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close_streamfile(temp_streamFile);
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return vgmstream;
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fail:
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close_streamfile(temp_streamFile);
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close_vgmstream(vgmstream);
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return NULL;
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}
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