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https://github.com/vgmstream/vgmstream.git
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66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
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#ifndef _MUL_STREAMFILE_H_
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#define _MUL_STREAMFILE_H_
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#include "deblock_streamfile.h"
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static void block_callback(STREAMFILE* sf, deblock_io_data* data) {
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uint32_t block_type;
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size_t block_size;
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uint32_t (*read_u32)(off_t,STREAMFILE*) = data->cfg.big_endian ? read_u32be : read_u32le;
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if (data->physical_offset == 0) {
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data->block_size = 0x800;
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data->data_size = 0;
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data->skip_size = 0;
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return;
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}
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block_type = read_u32(data->physical_offset + 0x00, sf);
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block_size = read_u32(data->physical_offset + 0x04, sf); /* not including main header */
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/* some blocks only contain half of data (continues in next block) so use track numbers */
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if (block_type == 0x00 && block_size != 0) {
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/* header block */
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data->block_size = 0x10;
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data->data_size = 0;
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data->skip_size = 0;
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}
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else if (block_type == 0x00000800) {
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data->block_size = 0x810;
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/* actually sub-block with size + number, kinda half-assed but meh... */
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if (block_size == data->cfg.track_number) {
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data->data_size = 0x800;
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data->skip_size = 0x10;
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}
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else{
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data->data_size = 0;
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data->skip_size = 0;
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}
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}
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else {
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/* non-audio block */
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data->block_size = block_size + 0x10;
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data->data_size = 0;
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data->skip_size = 0;
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}
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}
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/* Deinterleaves MUL streams */
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static STREAMFILE* setup_mul_streamfile(STREAMFILE* sf, int big_endian, int track_number, int track_count) {
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STREAMFILE *new_sf = NULL;
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deblock_config_t cfg = {0};
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cfg.big_endian = big_endian;
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cfg.track_number = track_number;
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cfg.track_count = track_count;
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cfg.block_callback = block_callback;
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new_sf = open_wrap_streamfile(sf);
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new_sf = open_io_deblock_streamfile_f(new_sf, &cfg);
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return new_sf;
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}
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#endif /* _MUL_STREAMFILE_H_ */
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