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https://github.com/vgmstream/vgmstream.git
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a41c341a18
nds strm fixed genh dsp interleave types added git-svn-id: https://vgmstream.svn.sourceforge.net/svnroot/vgmstream@489 51a99a44-fe44-0410-b1ba-c3e57ba2b86b
172 lines
5.4 KiB
C
172 lines
5.4 KiB
C
#include "meta.h"
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#include "../util.h"
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VGMSTREAM * init_vgmstream_nds_strm(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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char filename[260];
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coding_t coding_type;
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int codec_number;
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int channel_count;
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int loop_flag;
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off_t start_offset;
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/* check extension, case insensitive */
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streamFile->get_name(streamFile,filename,sizeof(filename));
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if (strcasecmp("strm",filename_extension(filename))) goto fail;
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/* check header */
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if ((uint32_t)read_32bitBE(0x00,streamFile)!=0x5354524D) /* STRM */
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goto fail;
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if ((uint32_t)read_32bitBE(0x04,streamFile)!=0xFFFE0001 && /* Old Header Check */
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((uint32_t)read_32bitBE(0x04,streamFile)!=0xFEFF0001)) /* Some newer games have a new flag */
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goto fail;
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/* check for HEAD section */
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if ((uint32_t)read_32bitBE(0x10,streamFile)!=0x48454144 && /* "HEAD" */
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(uint32_t)read_32bitLE(0x14,streamFile)!=0x50) /* 0x50-sized head is all I've seen */
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goto fail;
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/* check type details */
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codec_number = read_8bit(0x18,streamFile);
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loop_flag = read_8bit(0x19,streamFile);
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channel_count = read_8bit(0x1a,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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coding_type = coding_NDS_IMA;
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break;
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default:
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goto fail;
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}
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/* TODO: only mono and stereo supported */
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if (channel_count < 1 || channel_count > 2) 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(0x24,streamFile);
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vgmstream->sample_rate = (uint16_t)read_16bitLE(0x1c,streamFile);
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/* channels and loop flag are set by allocate_vgmstream */
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vgmstream->loop_start_sample = read_32bitLE(0x20,streamFile);
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vgmstream->loop_end_sample = vgmstream->num_samples;
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vgmstream->coding_type = coding_type;
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vgmstream->meta_type = meta_STRM;
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vgmstream->interleave_block_size = read_32bitLE(0x30,streamFile);
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vgmstream->interleave_smallblock_size = read_32bitLE(0x38,streamFile);
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if (coding_type==coding_PCM8 || coding_type==coding_PCM16LE)
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vgmstream->layout_type = layout_none;
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else
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vgmstream->layout_type = layout_interleave_shortblock;
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start_offset = read_32bitLE(0x28,streamFile);
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/* open the file for reading by each channel */
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{
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int i;
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for (i=0;i<channel_count;i++) {
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if (vgmstream->layout_type==layout_interleave_shortblock)
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vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,
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vgmstream->interleave_block_size);
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else
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vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename,
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0x1000);
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if (!vgmstream->ch[i].streamfile) goto fail;
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vgmstream->ch[i].channel_start_offset=
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vgmstream->ch[i].offset=
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start_offset + i*vgmstream->interleave_block_size;
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}
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}
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return vgmstream;
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/* clean up anything we may have opened */
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fail:
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if (vgmstream) close_vgmstream(vgmstream);
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return NULL;
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}
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/* STRM (from Final Fantasy Tactics A2 - Fuuketsu no Grimoire) */
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VGMSTREAM * init_vgmstream_nds_strm_ffta2(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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char filename[260];
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off_t start_offset;
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int loop_flag;
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int channel_count;
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/* check extension, case insensitive */
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streamFile->get_name(streamFile,filename,sizeof(filename));
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if (strcasecmp("strm",filename_extension(filename))) goto fail;
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/* check header */
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if (read_32bitBE(0x00,streamFile) != 0x52494646 || /* RIFF */
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read_32bitBE(0x08,streamFile) != 0x494D4120) /* "IMA " */
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goto fail;
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loop_flag = (read_32bitLE(0x20,streamFile) !=0);
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channel_count = read_32bitLE(0x24,streamFile);
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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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start_offset = 0x2C;
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vgmstream->channels = channel_count;
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vgmstream->sample_rate = read_32bitLE(0x0C,streamFile);
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vgmstream->coding_type = coding_INT_IMA;
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vgmstream->num_samples = (read_32bitLE(0x04,streamFile)-start_offset);
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if (loop_flag) {
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vgmstream->loop_start_sample = read_32bitLE(0x20,streamFile);
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vgmstream->loop_end_sample = read_32bitLE(0x28,streamFile);
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}
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vgmstream->interleave_block_size = 0x80;
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vgmstream->interleave_smallblock_size = (vgmstream->loop_end_sample)%((vgmstream->loop_end_sample)/vgmstream->interleave_block_size);
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vgmstream->layout_type = layout_interleave_shortblock;
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vgmstream->meta_type = meta_NDS_STRM_FFTA2;
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/* open the file for reading */
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{
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int i;
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STREAMFILE * file;
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file = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
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if (!file) goto fail;
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for (i=0;i<channel_count;i++) {
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vgmstream->ch[i].streamfile = file;
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vgmstream->ch[i].channel_start_offset=
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vgmstream->ch[i].offset=start_offset+
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vgmstream->interleave_block_size*i;
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}
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}
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return vgmstream;
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/* clean up anything we may have opened */
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fail:
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if (vgmstream) close_vgmstream(vgmstream);
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return NULL;
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}
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