mirror of
https://github.com/vgmstream/vgmstream.git
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84 lines
3.0 KiB
C
84 lines
3.0 KiB
C
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#include "meta.h"
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#include "../coding/coding.h"
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/* .wsi - blocked dsp [Alone in the Dark (Wii)] */
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VGMSTREAM * init_vgmstream_wsi(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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off_t start_offset, header_offset;
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size_t header_spacing;
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int loop_flag, channel_count;
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/* checks */
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if (!check_extensions(streamFile, "wsi"))
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goto fail;
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channel_count = read_32bitBE(0x04,streamFile);
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if (channel_count != 2) goto fail; /* assumed */
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/* check for consistent block headers */
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{
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off_t block_offset;
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off_t block_size_has_been;
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int i;
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block_offset = read_32bitBE(0x00,streamFile);
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if (block_offset < 0x08) goto fail;
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block_size_has_been = block_offset;
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/* check 4 blocks, to get an idea */
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for (i = 0; i < 4*channel_count; i++) {
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off_t block_size = read_32bitBE(block_offset,streamFile);
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if (block_size < 0x10)
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goto fail; /* expect at least the block header */
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if (i%channel_count+1 != read_32bitBE(block_offset+0x08,streamFile))
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goto fail; /* expect the channel numbers to alternate */
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if (i%channel_count==0)
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block_size_has_been = block_size;
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else if (block_size != block_size_has_been)
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goto fail; /* expect every block in a set of channels to have the same size */
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block_offset += block_size;
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}
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}
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start_offset = read_32bitBE(0x00, streamFile);
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header_offset = start_offset + 0x10;
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header_spacing = read_32bitBE(start_offset,streamFile);
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/* contains standard DSP header, but since it's blocked validations (start/loop ps, etc)
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* will fail, so no point to handle as standard DSP */
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loop_flag = read_16bitBE(header_offset+0x0c,streamFile);
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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_DSP_WSI;
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vgmstream->sample_rate = read_32bitBE(header_offset+0x08,streamFile);
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vgmstream->num_samples = read_32bitBE(header_offset+0x00,streamFile) / 14 * 14; /* remove incomplete last frame */
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vgmstream->loop_start_sample = dsp_nibbles_to_samples(read_32bitBE(header_offset+0x10,streamFile));
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vgmstream->loop_end_sample = dsp_nibbles_to_samples(read_32bitBE(header_offset+0x14,streamFile))+1;
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if (vgmstream->loop_end_sample > vgmstream->num_samples) /* ? */
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vgmstream->loop_end_sample = vgmstream->num_samples;
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vgmstream->coding_type = coding_NGC_DSP;
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vgmstream->layout_type = layout_blocked_wsi;
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dsp_read_coefs_be(vgmstream, streamFile, header_offset+0x1c, header_spacing);
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dsp_read_hist_be(vgmstream, streamFile, header_offset+0x40, header_spacing);
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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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