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52 lines
1.8 KiB
C
52 lines
1.8 KiB
C
#ifndef _AIX_STREAMFILE_H_
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#define _AIX_STREAMFILE_H_
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#include "deblock_streamfile.h"
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//todo block size must check >= stream_size
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static void block_callback(STREAMFILE *sf, deblock_io_data *data) {
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uint32_t block_id = read_u32be(data->physical_offset + 0x00, sf);
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data->block_size = read_u32be(data->physical_offset + 0x04, sf) + 0x08;
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/* check "AIXP" id, (AIX segments end with "AIXE" too) */
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if (block_id != 0x41495850) {
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return;
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}
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/* read target layer, otherwise ignore block */
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if (read_s8(data->physical_offset + 0x08, sf) == data->cfg.track_number) {
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/* 0x09(1): layer count */
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data->data_size = read_s16be(data->physical_offset + 0x0a, sf);
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/* 0x0c: -1 */
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data->skip_size = 0x10;
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}
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/* strange AIX in Tetris Collection (PS2) with padding before ADX start (no known flag) */
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if (data->logical_offset == 0x00 &&
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read_u32be(data->physical_offset + 0x10, sf) == 0 &&
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read_u16be(data->physical_offset + data->block_size - 0x28, sf) == 0x8000) {
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data->data_size = 0x28;
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data->skip_size = data->block_size - 0x28;
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}
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}
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/* Deinterleaves AIX layers */
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static STREAMFILE* setup_aix_streamfile(STREAMFILE *sf, off_t stream_offset, size_t stream_size, int layer_number, 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 = stream_offset;
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cfg.stream_size = stream_size;
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cfg.track_number = layer_number;
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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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//new_sf = open_buffer_streamfile_f(new_sf, 0);
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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 /* _AIX_STREAMFILE_H_ */
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