mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-01 09:37:21 +01:00
Fix bcstm 3DS-IMA last interleave and cleanup
This commit is contained in:
bnnm
parent
d5a11d58e8
commit
9720384fbe
228
src/meta/bcstm.c
228
src/meta/bcstm.c
@ -1,165 +1,133 @@
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#include "meta.h"
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#include "../util.h"
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#include "../coding/coding.h"
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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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coding_t coding_type;
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off_t info_offset = 0, seek_offset = 0, data_offset = 0;
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uint16_t temp_id;
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int codec_number;
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int channel_count, loop_flag;
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int i, ima = 0;
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off_t start_offset;
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int section_count;
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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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/* check extension, case insensitive */
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/* checks */
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if ( !check_extensions(streamFile,"bcstm") )
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goto fail;
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/* check header */
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if ((uint32_t)read_32bitBE(0, streamFile) != 0x4353544D) /* "CSTM" */
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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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/* 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 ((uint16_t)read_16bitLE(4, streamFile) != 0xFEFF)
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goto fail;
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section_count = read_16bitLE(0x10, streamFile);
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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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temp_id = read_16bitLE(0x14 + i * 0xc, streamFile);
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switch(temp_id) {
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case 0x4000:
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info_offset = read_32bitLE(0x18 + i * 0xc, streamFile);
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/* size_t info_size = read_32bitLE(0x1c + i * 0xc, streamFile); */
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break;
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case 0x4001:
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seek_offset = read_32bitLE(0x18 + i * 0xc, streamFile);
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/* size_t seek_size = read_32bitLE(0x1c + i * 0xc, streamFile); */
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break;
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case 0x4002:
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data_offset = read_32bitLE(0x18 + i * 0xc, streamFile);
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/* size_t data_size = read_32bitLE(0x1c + i * 0xc, streamFile); */
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break;
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case 0x4003:
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/* off_t regn_offset = read_32bitLE(0x18 + i * 0xc, streamFile); */
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/* size_t regn_size = read_32bitLE(0x1c + i * 0xc, streamFile); */
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break;
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case 0x4004:
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/* off_t pdat_offset = read_32bitLE(0x18 + i * 0xc, streamFile); */
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/* size_t pdat_size = read_32bitLE(0x1c + i * 0xc, streamFile); */
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break;
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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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}
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}
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if (info_offset == 0) goto fail;
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if ((uint32_t)read_32bitBE(info_offset, streamFile) != 0x494E464F) /* "INFO" */
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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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/* check type details */
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codec_number = read_8bit(info_offset + 0x20, streamFile);
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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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switch (codec_number) {
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case 0:
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coding_type = coding_PCM8;
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break;
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case 1:
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coding_type = coding_PCM16LE;
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break;
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case 2:
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if (seek_offset == 0) goto fail;
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if ((uint32_t)read_32bitBE(seek_offset, streamFile) != 0x5345454B) { /* "SEEK" If this header doesn't exist, assuming that the file is IMA */
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ima = 1;
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coding_type = coding_3DS_IMA;
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}
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else
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coding_type = coding_NGC_DSP;
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break;
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default:
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goto fail;
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}
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if (channel_count < 1) goto fail;
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channel_count, loop_flag);
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if (!vgmstream) goto fail;
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/* fill in the vital statistics */
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vgmstream->num_samples = read_32bitLE(info_offset + 0x2c, streamFile);
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vgmstream->sample_rate = read_32bitLE(info_offset + 0x24, streamFile);
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/* channels and loop flag are set by allocate_vgmstream */
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if (ima) //Shift the loop points back slightly to avoid stupid pops in some IMA streams due to DC offsetting
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{
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vgmstream->loop_start_sample = read_32bitLE(info_offset + 0x28, streamFile);
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if (vgmstream->loop_start_sample > 10000)
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{
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vgmstream->loop_start_sample -= 5000;
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vgmstream->loop_end_sample = vgmstream->num_samples - 5000;
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}
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else
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vgmstream->loop_end_sample = vgmstream->num_samples;
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}
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else
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{
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vgmstream->loop_start_sample = read_32bitLE(info_offset + 0x28, streamFile);
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vgmstream->loop_end_sample = vgmstream->num_samples;
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}
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vgmstream->coding_type = coding_type;
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vgmstream->layout_type = (channel_count == 1) ? layout_none : layout_interleave;
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vgmstream->meta_type = meta_CSTM;
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if (ima) {
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vgmstream->interleave_block_size = 0x200;
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} else {
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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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}
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if (vgmstream->coding_type == coding_NGC_DSP) {
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off_t coef_offset;
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off_t tempoffset = info_offset;
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int foundcoef = 0;
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int i, j;
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int coef_spacing = 0x2E;
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while (!(foundcoef))
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{
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if ((uint32_t)read_32bitLE(tempoffset, streamFile) == 0x00004102)
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{
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coef_offset = read_32bitLE(tempoffset + 4, streamFile) + tempoffset + (channel_count * 8) - 4 - info_offset;
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foundcoef++;
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break;
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}
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tempoffset++;
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}
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for (j = 0; j<vgmstream->channels; j++) {
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for (i = 0; i<16; i++) {
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vgmstream->ch[j].adpcm_coef[i] = read_16bitLE(info_offset + coef_offset + j*coef_spacing + i * 2, streamFile);
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}
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}
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}
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if (ima) { // No SEEK (ADPC) header, so just start where the SEEK header is supposed to be.
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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 (seek_offset == 0) goto fail;
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start_offset = seek_offset;
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} else {
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is_camelot_ima = 1;
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}
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else {
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if (data_offset == 0) goto fail;
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start_offset = data_offset + 0x20;
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}
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/* open the file for reading by each channel */
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channel_count, 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->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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/* 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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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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}
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switch(codec) {
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case 0x00:
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vgmstream->coding_type = coding_PCM8;
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break;
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case 0x01:
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vgmstream->coding_type = coding_PCM16LE;
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break;
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case 0x02:
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vgmstream->coding_type = coding_NGC_DSP;
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if (is_camelot_ima) {
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vgmstream->coding_type = coding_3DS_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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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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}
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}
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}
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break;
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default: /* 0x03: IMA? */
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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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goto fail;
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return vgmstream;
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fail:
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