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52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* .ASS - from Dai Senryaku VII: Exceed (PS2) */
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VGMSTREAM * init_vgmstream_ps2_ass(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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off_t start_offset;
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size_t channel_size, interleave;
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int loop_flag, channel_count, sample_rate;
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int32_t num_samples, loop_start = 0, loop_end = 0;
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/* checks */
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if (!check_extensions(streamFile, "ass"))
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goto fail;
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start_offset = 0x800;
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channel_count = read_32bitLE(0x00,streamFile); /* assumed */
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if (channel_count != 2) goto fail;
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sample_rate = read_32bitLE(0x04,streamFile);
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channel_size = read_32bitLE(0x08,streamFile);
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interleave = read_32bitLE(0x0c,streamFile);
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num_samples = ps_bytes_to_samples(channel_size,1);
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loop_flag = ps_find_loop_offsets(streamFile, start_offset, channel_size*channel_count, channel_count, interleave, &loop_start, &loop_end);
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loop_flag = loop_flag && (num_samples > 10*sample_rate); /* disable looping for smaller files (in seconds) */
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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->meta_type = meta_PS2_ASS;
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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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vgmstream->coding_type = coding_PSX;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = interleave;
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if (!vgmstream_open_stream(vgmstream,streamFile,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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