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https://github.com/vgmstream/vgmstream.git
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Remove Camelot .bcstm loop hack
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bnnm
parent
bbba3b367e
commit
5c08e60f8a
115
src/meta/bcstm.c
115
src/meta/bcstm.c
@ -3,59 +3,60 @@
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/* BCSTM - Nintendo 3DS format */
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VGMSTREAM * init_vgmstream_bcstm(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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VGMSTREAM* init_vgmstream_bcstm(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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off_t start_offset;
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off_t info_offset = 0, seek_offset = 0, data_offset = 0;
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int channel_count, loop_flag, codec;
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int is_camelot_ima = 0;
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int channels, loop_flag, codec;
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bool is_camelot_ima = false;
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/* checks */
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if ( !check_extensions(streamFile,"bcstm") )
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goto fail;
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if (!is_id32be(0x00, sf, "CSTM"))
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return NULL;
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if (!check_extensions(sf,"bcstm"))
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return NULL;
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/* CSTM header */
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if (read_32bitBE(0x00, streamFile) != 0x4353544D) /* "CSTM" */
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goto fail;
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/* 0x06(2): header size (0x40), 0x08: version (0x00000400), 0x0c: file size (not accurate for Camelot IMA) */
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// 04: BOM
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// 06: header size (0x40)
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// 08: version (0x00000400)
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// 0c: file size (not accurate for Camelot IMA)
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/* check BOM */
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if ((uint16_t)read_16bitLE(0x04, streamFile) != 0xFEFF)
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goto fail;
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if (read_u16le(0x04, sf) != 0xFEFF)
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return NULL;
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/* get sections (should always appear in the same order) */
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{
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int i;
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int section_count = read_16bitLE(0x10, streamFile);
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for (i = 0; i < section_count; i++) {
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/* 0x00: id, 0x02(2): padding, 0x04(4): offset, 0x08(4): size */
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uint16_t section_id = read_16bitLE(0x14 + i*0x0c+0x00, streamFile);
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switch(section_id) {
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case 0x4000: info_offset = read_32bitLE(0x14 + i*0x0c+0x04, streamFile); break;
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case 0x4001: seek_offset = read_32bitLE(0x14 + i*0x0c+0x04, streamFile); break;
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case 0x4002: data_offset = read_32bitLE(0x14 + i*0x0c+0x04, streamFile); break;
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//case 0x4003: /* off_t regn_offset = read_32bitLE(0x18 + i * 0xc, streamFile); */ /* ? */
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//case 0x4004: /* off_t pdat_offset = read_32bitLE(0x18 + i * 0xc, streamFile); */ /* ? */
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default:
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break;
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}
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/* get sections (should always appear in the same order though) */
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int section_count = read_u16le(0x10, sf);
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for (int i = 0; i < section_count; i++) {
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// 00: id
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// 02 padding
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// 04: offset
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// 08: size
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uint16_t section_id = read_u16le(0x14 + i * 0x0c + 0x00, sf);
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switch(section_id) {
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case 0x4000: info_offset = read_u32le(0x14 + i * 0x0c + 0x04, sf); break;
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case 0x4001: seek_offset = read_u32le(0x14 + i * 0x0c + 0x04, sf); break;
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case 0x4002: data_offset = read_u32le(0x14 + i * 0x0c + 0x04, sf); break;
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//case 0x4003: regn_offset = read_u32le(0x18 + i * 0x0c + 0x04, sf); break; // ?
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//case 0x4004: pdat_offset = read_u32le(0x18 + i * 0x0c + 0x04, sf); break; // ?
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default:
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break;
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}
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}
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/* INFO section */
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if (read_32bitBE(info_offset, streamFile) != 0x494E464F) /* "INFO" */
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goto fail;
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codec = read_8bit(info_offset + 0x20, streamFile);
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loop_flag = read_8bit(info_offset + 0x21, streamFile);
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channel_count = read_8bit(info_offset + 0x22, streamFile);
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if (!is_id32be(info_offset, sf, "INFO"))
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return NULL;
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codec = read_u8(info_offset + 0x20, sf);
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loop_flag = read_8bit(info_offset + 0x21, sf);
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channels = read_8bit(info_offset + 0x22, sf);
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/* Camelot games have some weird codec hijack [Mario Tennis Open (3DS), Mario Golf: World Tour (3DS)] */
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if (codec == 0x02 && read_32bitBE(seek_offset, streamFile) != 0x5345454B) { /* "SEEK" */
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if (codec == 0x02 && !is_id32be(seek_offset, sf, "SEEK")) {
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if (seek_offset == 0) goto fail;
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start_offset = seek_offset;
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is_camelot_ima = 1;
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is_camelot_ima = true;
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}
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else {
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if (data_offset == 0) goto fail;
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@ -64,33 +65,24 @@ VGMSTREAM * init_vgmstream_bcstm(STREAMFILE *streamFile) {
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channel_count, loop_flag);
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vgmstream = allocate_vgmstream(channels, loop_flag);
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if (!vgmstream) goto fail;
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vgmstream->sample_rate = read_32bitLE(info_offset + 0x24, streamFile);
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vgmstream->num_samples = read_32bitLE(info_offset + 0x2c, streamFile);
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vgmstream->loop_start_sample = read_32bitLE(info_offset + 0x28, streamFile);
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vgmstream->sample_rate = read_s32le(info_offset + 0x24, sf);
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vgmstream->num_samples = read_s32le(info_offset + 0x2c, sf);
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vgmstream->loop_start_sample = read_s32le(info_offset + 0x28, sf);
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vgmstream->loop_end_sample = vgmstream->num_samples;
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vgmstream->meta_type = meta_CSTM;
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vgmstream->layout_type = (channel_count == 1) ? layout_none : layout_interleave;
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vgmstream->interleave_block_size = read_32bitLE(info_offset + 0x34, streamFile);
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vgmstream->interleave_last_block_size = read_32bitLE(info_offset + 0x44, streamFile);
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vgmstream->layout_type = (channels == 1) ? layout_none : layout_interleave;
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vgmstream->interleave_block_size = read_u32le(info_offset + 0x34, sf);
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vgmstream->interleave_last_block_size = read_u32le(info_offset + 0x44, sf);
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/* Camelot doesn't follow header values */
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if (is_camelot_ima) {
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size_t block_samples, last_samples;
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size_t data_size = get_streamfile_size(streamFile) - start_offset;
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size_t data_size = get_streamfile_size(sf) - start_offset;
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vgmstream->interleave_block_size = 0x200;
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vgmstream->interleave_last_block_size = (data_size % (vgmstream->interleave_block_size*channel_count)) / channel_count;
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/* align the loop points back to avoid pops in some IMA streams, seems to help some Mario Golf songs but not all */
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block_samples = ima_bytes_to_samples(vgmstream->interleave_block_size*channel_count,channel_count); // 5000?
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last_samples = ima_bytes_to_samples(vgmstream->interleave_last_block_size*channel_count,channel_count);
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if (vgmstream->loop_start_sample > block_samples) {
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vgmstream->loop_start_sample -= last_samples;
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vgmstream->loop_end_sample -= last_samples;
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}
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vgmstream->interleave_last_block_size = (data_size % (vgmstream->interleave_block_size * channels)) / channels;
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}
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switch(codec) {
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@ -107,16 +99,15 @@ VGMSTREAM * init_vgmstream_bcstm(STREAMFILE *streamFile) {
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vgmstream->coding_type = coding_NW_IMA;
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}
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else {
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int i, c;
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off_t channel_indexes, channel_info_offset, coefs_offset;
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channel_indexes = info_offset+0x08 + read_32bitLE(info_offset + 0x1C, streamFile);
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for (i = 0; i < vgmstream->channels; i++) {
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channel_info_offset = channel_indexes + read_32bitLE(channel_indexes+0x04+(i*0x08)+0x04, streamFile);
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coefs_offset = channel_info_offset + read_32bitLE(channel_info_offset+0x04, streamFile);
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channel_indexes = info_offset+0x08 + read_u32le(info_offset + 0x1C, sf);
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for (int i = 0; i < vgmstream->channels; i++) {
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channel_info_offset = channel_indexes + read_u32le(channel_indexes + 0x04 + (i * 0x08) + 0x04, sf);
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coefs_offset = channel_info_offset + read_u32le(channel_info_offset + 0x04, sf);
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for (c = 0; c < 16; c++) {
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vgmstream->ch[i].adpcm_coef[c] = read_16bitLE(coefs_offset + c*2, streamFile);
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for (int c = 0; c < 16; c++) {
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vgmstream->ch[i].adpcm_coef[c] = read_s16le(coefs_offset + c * 0x02, sf);
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}
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}
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}
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@ -126,7 +117,7 @@ VGMSTREAM * init_vgmstream_bcstm(STREAMFILE *streamFile) {
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goto fail;
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}
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if (!vgmstream_open_stream(vgmstream,streamFile,start_offset))
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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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