109 lines
3.2 KiB
C
109 lines
3.2 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* MJB+MJH - SCEE MultiStream? bank of MIB+MIH [Star Wars: Bounty Hunter (PS2)] */
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VGMSTREAM* init_vgmstream_mjb_mjh(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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STREAMFILE* sh = NULL;
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STREAMFILE* sb = NULL;
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off_t start_offset = 0, header_offset = 0;
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size_t data_size, frame_size, frame_count;
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int channels, loop_flag, sample_rate;
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int total_subsongs, target_subsong = sf->stream_index;
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/* for plugins that start with .mjb */
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if (check_extensions(sf,"mjb")) {
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sh = open_streamfile_by_ext(sf, "mjh");
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if (!sh) goto fail;
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}
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else {
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sh = sf;
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}
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/* checks */
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/* "base" header check only has total subsongs, check expected header size */
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if (read_s32le(0x00,sh) * 0x40 + 0x40 != get_streamfile_size(sh))
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goto fail;
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if (read_u32le(0x10,sh) != 0 || read_u32le(0x20,sh) != 0 || read_u32le(0x30,sh) != 0) /* padding until 0x40 */
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goto fail;
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/* only body for now */
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if (!check_extensions(sf, "mjb"))
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goto fail;
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/* parse entries */
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{
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int i;
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off_t subsong_offset = 0;
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total_subsongs = read_s32le(0x00,sh);
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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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for (i = 0; i < total_subsongs; i++) {
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off_t offset = 0x40 + 0x40 * i;
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size_t subsong_size = read_u32le(offset + 0x08,sh) * read_u32le(offset + 0x10,sh) * read_u32le(offset + 0x14,sh);
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if (i + 1== target_subsong) {
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header_offset = offset;
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start_offset = subsong_offset;
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}
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subsong_offset += subsong_size;
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}
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if (!header_offset)
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goto fail;
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}
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/* also see MIB+MIH (same thing but this excludes padding stuff) */
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if (read_u32le(header_offset + 0x00,sh) != 0x40)
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goto fail;
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channels = read_u32le(header_offset + 0x08,sh);
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sample_rate = read_u32le(header_offset + 0x0c,sh);
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frame_size = read_u32le(header_offset + 0x10,sh);
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frame_count = read_u32le(header_offset + 0x14,sh);
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data_size = frame_count * frame_size * channels;
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loop_flag = 0;
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/* for plugins that start with .mjh (and don't check extensions) */
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if (sf == sh) {
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sb = open_streamfile_by_ext(sf, "mjb");
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if (!sb) goto fail;
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}
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else {
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sb = sf;
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}
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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_MJB_MJH;
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vgmstream->sample_rate = sample_rate;
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vgmstream->num_samples = ps_bytes_to_samples(data_size, channels);
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vgmstream->num_streams = total_subsongs;
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vgmstream->stream_size = data_size;
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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 = frame_size;
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if (!vgmstream_open_stream(vgmstream, sb, start_offset))
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goto fail;
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if (sf != sh) close_streamfile(sh);
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if (sf != sb) close_streamfile(sb);
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return vgmstream;
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fail:
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if (sf != sh) close_streamfile(sh);
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if (sf != sb) close_streamfile(sb);
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close_vgmstream(vgmstream);
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return NULL;
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}
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