83 lines
2.7 KiB
C
83 lines
2.7 KiB
C
#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 (*read_u32)(off_t,STREAMFILE*) = data->cfg.big_endian ? read_u32be : read_u32le;
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/* Blocks have base header + sub-blocks with track sub-header.
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* Some blocks don't contain all channels (instead they begin next block). */
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if (data->chunk_size && data->chunk_size < 0x10) {
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/* padding after all sub-blocks */
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data->block_size = data->chunk_size;
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data->data_size = 0;
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data->skip_size = 0;
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data->chunk_size = 0;
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}
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else if (data->chunk_size) {
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/* audio block sub-headers, ignore data for other tracks */
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uint32_t track_size = read_u32(data->physical_offset + 0x00, sf);
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uint32_t track_number = read_u32(data->physical_offset + 0x04, sf);
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/* 0x08: dummy (may contain un-init'd data) */
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/* 0x0c: dummy (may contain un-init'd data) */
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data->block_size = 0x10 + track_size;
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data->data_size = 0;
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data->skip_size = 0;
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if (track_number == data->cfg.track_number) {
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data->data_size = track_size;
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data->skip_size = 0x10;
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}
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data->chunk_size -= data->block_size;
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}
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else {
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/* base block header */
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uint32_t block_type = read_u32(data->physical_offset + 0x00, sf);
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uint32_t block_size = read_u32(data->physical_offset + 0x04, sf);
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/* 0x08: dummy */
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/* 0x0c: dummy */
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/* blocks are padded after all sub-blocks */
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if (block_size % 0x10) {
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block_size = block_size + 0x10 - (block_size % 0x10);
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}
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data->data_size = 0;
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data->skip_size = 0;
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if (block_type == 0x00 && block_size != 0) {
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/* audio block */
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data->block_size = 0x10;
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data->chunk_size = block_size;
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}
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else {
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/* non-audio block (or empty audio block) */
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data->block_size = block_size + 0x10;
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}
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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, off_t offset, int big_endian, int track_number, int track_count, const char* extension) {
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STREAMFILE *new_sf = NULL;
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deblock_config_t cfg = {0};
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cfg.stream_start = offset;
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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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if (extension)
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new_sf = open_fakename_streamfile_f(new_sf, NULL, extension);
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return new_sf;
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}
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#endif /* _MUL_STREAMFILE_H_ */
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