diff options
Diffstat (limited to 'lib/vgmstream/src/meta/nds_strm.c')
| -rw-r--r-- | lib/vgmstream/src/meta/nds_strm.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/lib/vgmstream/src/meta/nds_strm.c b/lib/vgmstream/src/meta/nds_strm.c new file mode 100644 index 0000000000..39fa88fa43 --- /dev/null +++ b/lib/vgmstream/src/meta/nds_strm.c @@ -0,0 +1,171 @@ +#include "meta.h" +#include "../util.h" + +VGMSTREAM * init_vgmstream_nds_strm(STREAMFILE *streamFile) { + VGMSTREAM * vgmstream = NULL; + char filename[260]; + + coding_t coding_type; + + int codec_number; + int channel_count; + int loop_flag; + + off_t start_offset; + + /* check extension, case insensitive */ + streamFile->get_name(streamFile,filename,sizeof(filename)); + if (strcasecmp("strm",filename_extension(filename))) goto fail; + + /* check header */ + if ((uint32_t)read_32bitBE(0x00,streamFile)!=0x5354524D) /* STRM */ + goto fail; + if ((uint32_t)read_32bitBE(0x04,streamFile)!=0xFFFE0001 && /* Old Header Check */ + ((uint32_t)read_32bitBE(0x04,streamFile)!=0xFEFF0001)) /* Some newer games have a new flag */ + goto fail; + + + + /* check for HEAD section */ + if ((uint32_t)read_32bitBE(0x10,streamFile)!=0x48454144 && /* "HEAD" */ + (uint32_t)read_32bitLE(0x14,streamFile)!=0x50) /* 0x50-sized head is all I've seen */ + goto fail; + + /* check type details */ + codec_number = read_8bit(0x18,streamFile); + loop_flag = read_8bit(0x19,streamFile); + channel_count = read_8bit(0x1a,streamFile); + + switch (codec_number) { + case 0: + coding_type = coding_PCM8; + break; + case 1: + coding_type = coding_PCM16LE; + break; + case 2: + coding_type = coding_NDS_IMA; + break; + default: + goto fail; + } + + /* TODO: only mono and stereo supported */ + if (channel_count < 1 || channel_count > 2) goto fail; + + /* build the VGMSTREAM */ + + vgmstream = allocate_vgmstream(channel_count,loop_flag); + if (!vgmstream) goto fail; + + /* fill in the vital statistics */ + vgmstream->num_samples = read_32bitLE(0x24,streamFile); + vgmstream->sample_rate = (uint16_t)read_16bitLE(0x1c,streamFile); + /* channels and loop flag are set by allocate_vgmstream */ + vgmstream->loop_start_sample = read_32bitLE(0x20,streamFile); + vgmstream->loop_end_sample = vgmstream->num_samples; + + vgmstream->coding_type = coding_type; + vgmstream->meta_type = meta_STRM; + + vgmstream->interleave_block_size = read_32bitLE(0x30,streamFile); + vgmstream->interleave_smallblock_size = read_32bitLE(0x38,streamFile); + + if (coding_type==coding_PCM8 || coding_type==coding_PCM16LE) + vgmstream->layout_type = layout_none; + else + vgmstream->layout_type = layout_interleave_shortblock; + + start_offset = read_32bitLE(0x28,streamFile); + + /* open the file for reading by each channel */ + { + int i; + for (i=0;i<channel_count;i++) { + if (vgmstream->layout_type==layout_interleave_shortblock) + vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename, + vgmstream->interleave_block_size); + else + vgmstream->ch[i].streamfile = streamFile->open(streamFile,filename, + 0x1000); + if (!vgmstream->ch[i].streamfile) goto fail; + + vgmstream->ch[i].channel_start_offset= + vgmstream->ch[i].offset= + start_offset + i*vgmstream->interleave_block_size; + } + } + + return vgmstream; + + /* clean up anything we may have opened */ +fail: + if (vgmstream) close_vgmstream(vgmstream); + return NULL; +} + + +/* STRM (from Final Fantasy Tactics A2 - Fuuketsu no Grimoire) */ +VGMSTREAM * init_vgmstream_nds_strm_ffta2(STREAMFILE *streamFile) { + VGMSTREAM * vgmstream = NULL; + char filename[260]; + off_t start_offset; + + int loop_flag; + int channel_count; + + /* check extension, case insensitive */ + streamFile->get_name(streamFile,filename,sizeof(filename)); + if (strcasecmp("strm",filename_extension(filename))) goto fail; + + /* check header */ + if (read_32bitBE(0x00,streamFile) != 0x52494646 || /* RIFF */ + read_32bitBE(0x08,streamFile) != 0x494D4120) /* "IMA " */ + goto fail; + + loop_flag = (read_32bitLE(0x20,streamFile) !=0); + channel_count = read_32bitLE(0x24,streamFile); + + /* build the VGMSTREAM */ + vgmstream = allocate_vgmstream(channel_count,loop_flag); + if (!vgmstream) goto fail; + + /* fill in the vital statistics */ + start_offset = 0x2C; + vgmstream->channels = channel_count; + vgmstream->sample_rate = read_32bitLE(0x0C,streamFile); + vgmstream->coding_type = coding_INT_IMA; + vgmstream->num_samples = (read_32bitLE(0x04,streamFile)-start_offset); + if (loop_flag) { + vgmstream->loop_start_sample = read_32bitLE(0x20,streamFile); + vgmstream->loop_end_sample = read_32bitLE(0x28,streamFile); + } + + vgmstream->interleave_block_size = 0x80; + vgmstream->interleave_smallblock_size = (vgmstream->loop_end_sample)%((vgmstream->loop_end_sample)/vgmstream->interleave_block_size); + vgmstream->layout_type = layout_interleave_shortblock; + vgmstream->meta_type = meta_NDS_STRM_FFTA2; + + /* open the file for reading */ + { + int i; + STREAMFILE * file; + file = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE); + if (!file) goto fail; + for (i=0;i<channel_count;i++) { + vgmstream->ch[i].streamfile = file; + + vgmstream->ch[i].channel_start_offset= + vgmstream->ch[i].offset=start_offset+ + vgmstream->interleave_block_size*i; + + } + } + + return vgmstream; + + /* clean up anything we may have opened */ +fail: + if (vgmstream) close_vgmstream(vgmstream); + return NULL; +} |