mirror of
https://github.com/vgmstream/vgmstream.git
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94 lines
3.0 KiB
C
94 lines
3.0 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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#include "../layout/layout.h"
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/* Nippon Ichi SPS wrapper (segmented) [Penny-Punching Princess (Switch)] */
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VGMSTREAM * init_vgmstream_opus_sps_n1_segmented(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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off_t segment_offset;
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int loop_flag, channel_count;
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int i;
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segmented_layout_data *data = NULL;
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int segment_count, loop_start_segment = 0, loop_end_segment = 0;
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int num_samples = 0, loop_start_sample = 0, loop_end_sample = 0;
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/* checks */
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if (!check_extensions(streamFile, "at9"))
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goto fail;
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if (read_32bitBE(0x00,streamFile) != 0x09000000) /* file type (see other N1 SPS) */
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goto fail;
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if (read_32bitLE(0x04,streamFile) + 0x1c != get_streamfile_size(streamFile))
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goto fail;
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/* 0x08(2): sample rate, 0x0a(2): flag?, 0x0c: num_samples (slightly smaller than added samples) */
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segment_count = 3; /* intro/loop/end */
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loop_start_segment = 1;
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loop_end_segment = 1;
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loop_flag = (segment_count > 0);
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/* init layout */
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data = init_layout_segmented(segment_count);
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if (!data) goto fail;
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/* open each segment subfile */
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segment_offset = 0x1c;
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for (i = 0; i < segment_count; i++) {
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STREAMFILE* temp_streamFile;
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size_t segment_size = read_32bitLE(0x10+0x04*i,streamFile);
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if (!segment_size)
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goto fail;
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temp_streamFile = setup_subfile_streamfile(streamFile, segment_offset,segment_size, "opus");
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if (!temp_streamFile) goto fail;
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data->segments[i] = init_vgmstream_opus_std(temp_streamFile);
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close_streamfile(temp_streamFile);
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if (!data->segments[i]) goto fail;
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segment_offset += segment_size;
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//todo there are some trailing samples that must be removed for smooth loops, start skip seems ok
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data->segments[i]->num_samples -= 374; //not correct for all files, no idea how to calculate
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/* get looping and samples */
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if (loop_flag && loop_start_segment == i)
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loop_start_sample = num_samples;
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num_samples += data->segments[i]->num_samples;
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if (loop_flag && loop_end_segment == i)
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loop_end_sample = num_samples;
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}
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/* setup segmented VGMSTREAMs */
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if (!setup_layout_segmented(data))
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goto fail;
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channel_count = data->segments[0]->channels;
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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 = (uint16_t)read_16bitLE(0x08,streamFile);
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vgmstream->num_samples = num_samples;
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vgmstream->loop_start_sample = loop_start_sample;
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vgmstream->loop_end_sample = loop_end_sample;
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vgmstream->meta_type = meta_OPUS_PPP;
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vgmstream->coding_type = data->segments[0]->coding_type;
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vgmstream->layout_type = layout_segmented;
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vgmstream->layout_data = data;
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return vgmstream;
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fail:
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close_vgmstream(vgmstream);
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free_layout_segmented(data);
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return NULL;
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}
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