155 lines
4.3 KiB
C
155 lines
4.3 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* .VAS - from Konami Jikkyou Powerful Pro Yakyuu games */
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VGMSTREAM* init_vgmstream_ps2_vas(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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off_t start_offset;
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int loop_flag, channels;
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/* checks */
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if (!check_extensions(sf, "vas"))
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goto fail;
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if (read_u32le(0x00,sf) + 0x800 != get_streamfile_size(sf))
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goto fail;
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loop_flag = (read_u32le(0x10,sf) != 0);
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channels = 2;
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start_offset = 0x800;
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/* header is too simple so test a bit */
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if (!ps_check_format(sf, start_offset, 0x1000))
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goto fail;
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channels,loop_flag);
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if (!vgmstream) goto fail;
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vgmstream->meta_type = meta_PS2_VAS;
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vgmstream->sample_rate = read_s32le(0x04,sf);
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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 = 0x200;
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vgmstream->num_samples = ps_bytes_to_samples(read_u32le(0x00,sf), channels);
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vgmstream->loop_start_sample = ps_bytes_to_samples(read_u32le(0x14,sf), channels);
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vgmstream->loop_end_sample = vgmstream->num_samples;
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if (!vgmstream_open_stream(vgmstream, sf, 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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/* .VAS in containers */
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VGMSTREAM* init_vgmstream_ps2_vas_container(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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STREAMFILE* temp_sf = NULL;
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off_t subfile_offset = 0;
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size_t subfile_size = 0;
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int total_subsongs, target_subsong = sf->stream_index;
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/* checks */
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if (!check_extensions(sf, "vas"))
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goto fail;
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if (read_u32be(0x00, sf) == 0xAB8A5A00) { /* fixed value */
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/* just in case */
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if (read_u32le(0x04, sf) * 0x800 + 0x800 != get_streamfile_size(sf))
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goto fail;
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total_subsongs = read_s32le(0x08, sf); /* also at 0x10 */
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if (target_subsong == 0) target_subsong = 1;
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if (target_subsong < 0 || target_subsong > total_subsongs || total_subsongs < 1) goto fail;
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/* check offset table flag, 0x98 has table size */
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if (read_32bitLE(0x94, sf)) {
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off_t header_offset = 0x800 + 0x10*(target_subsong-1);
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/* some values are repeats found in the file sub-header */
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subfile_offset = read_32bitLE(header_offset + 0x00,sf) * 0x800;
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subfile_size = read_32bitLE(header_offset + 0x08,sf) + 0x800;
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}
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else {
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/* a bunch of files */
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off_t offset = 0x800;
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int i;
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for (i = 0; i < total_subsongs; i++) {
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size_t size = read_32bitLE(offset, sf) + 0x800;
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if (i + 1 == target_subsong) {
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subfile_offset = offset;
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subfile_size = size;
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break;
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}
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offset += size;
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}
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if (i == total_subsongs)
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goto fail;
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}
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}
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else {
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/* some .vas are just files pasted together, better extracted externally but whatevs */
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size_t file_size = get_streamfile_size(sf);
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off_t offset = 0;
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/* must have multiple .vas */
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if (read_32bitLE(0x00,sf) + 0x800 >= file_size)
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goto fail;
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total_subsongs = 0;
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if (target_subsong == 0) target_subsong = 1;
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while (offset < file_size) {
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size_t size = read_32bitLE(offset,sf) + 0x800;
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/* some files can be null, ignore */
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if (size > 0x800) {
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total_subsongs++;
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if (total_subsongs == target_subsong) {
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subfile_offset = offset;
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subfile_size = size;
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}
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}
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offset += size;
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}
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/* should end exactly at file_size */
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if (offset > file_size)
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goto fail;
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if (target_subsong < 0 || target_subsong > total_subsongs || total_subsongs < 1) goto fail;
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}
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temp_sf = setup_subfile_streamfile(sf, subfile_offset,subfile_size, NULL);
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if (!temp_sf) goto fail;
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vgmstream = init_vgmstream_ps2_vas(temp_sf);
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if (!vgmstream) goto fail;
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vgmstream->num_streams = total_subsongs;
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close_streamfile(temp_sf);
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return vgmstream;
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fail:
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close_streamfile(temp_sf);
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close_vgmstream(vgmstream);
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return NULL;
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}
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