diff options
Diffstat (limited to 'lib/vgmstream/src/meta/dc_str.c')
| -rw-r--r-- | lib/vgmstream/src/meta/dc_str.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/lib/vgmstream/src/meta/dc_str.c b/lib/vgmstream/src/meta/dc_str.c new file mode 100644 index 0000000000..071dcbb380 --- /dev/null +++ b/lib/vgmstream/src/meta/dc_str.c @@ -0,0 +1,165 @@ +#include "meta.h" +#include "../coding/coding.h" +#include "../util.h" + +/* SEGA Stream Asset Builder... + this meta handles only V1 and V3... */ + +VGMSTREAM * init_vgmstream_dc_str(STREAMFILE *streamFile) { + VGMSTREAM * vgmstream = NULL; + char filename[260]; + off_t start_offset; + int loop_flag = 0; + int interleave; + int channel_count; + int samples; + int i; + + /* check extension, case insensitive */ + streamFile->get_name(streamFile,filename,sizeof(filename)); + if (strcasecmp("str",filename_extension(filename))) goto fail; + + /* check header */ + if (read_32bitBE(0xD5,streamFile) != 0x53656761) /* "Sega" */ + goto fail; + + interleave = read_32bitLE(0xC,streamFile); + if ((get_streamfile_size(streamFile)-0x800) != (read_32bitLE(0x10,streamFile) * + ((read_32bitLE(0x0,streamFile)*(read_32bitLE(0x18,streamFile))))*interleave)) + goto fail; + + + loop_flag = 0; /* (read_32bitLE(0x00,streamFile)!=0x00000000); */ + samples = read_32bitLE(0x08,streamFile); + channel_count = (read_32bitLE(0x0,streamFile))*(read_32bitLE(0x18,streamFile)); + + vgmstream = allocate_vgmstream(channel_count,loop_flag); + if (!vgmstream) goto fail; + + + /* fill in the vital statistics */ + switch (samples) { + case 4: + vgmstream->coding_type = coding_AICA; + vgmstream->num_samples = read_32bitLE(0x14,streamFile); + if (loop_flag) { + vgmstream->loop_start_sample = 0; + vgmstream->loop_end_sample = read_32bitLE(0x14,streamFile); + } + break; + case 16: + vgmstream->coding_type = coding_PCM16LE; + vgmstream->num_samples = read_32bitLE(0x14,streamFile)/2/channel_count; + if (loop_flag) { + vgmstream->loop_start_sample = 0; + vgmstream->loop_end_sample = read_32bitLE(0x14,streamFile)/2/channel_count; + } + break; + default: + goto fail; +} + + + start_offset = 0x800; + vgmstream->channels = channel_count; + vgmstream->sample_rate = read_32bitLE(0x04,streamFile); + + if (vgmstream->channels == 1) { + vgmstream->layout_type = layout_none; + } else if (vgmstream->channels > 1) { + vgmstream->interleave_block_size = interleave; + vgmstream->layout_type = layout_interleave; + } + + vgmstream->meta_type = meta_DC_STR; + + /* 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; +} + +/* This handles V2, not sure if it is really V2, cause the header is always + the same, not like in V1 and V3, only found in "102 Dalmatians - Puppies to the Rescue" + until now... */ + +VGMSTREAM * init_vgmstream_dc_str_v2(STREAMFILE *streamFile) { + VGMSTREAM * vgmstream = NULL; + char filename[260]; + off_t start_offset; + int loop_flag = 0; + int channel_count; + + /* check extension, case insensitive */ + streamFile->get_name(streamFile,filename,sizeof(filename)); + if (strcasecmp("str",filename_extension(filename))) goto fail; +#if 0 + /* check header */ + if ((read_32bitBE(0x00,streamFile) != 0x00000002) && + (read_32bitBE(0x10,streamFile) != 0x00000100) && + (read_32bitBE(0x1C,streamFile) != 0x1F000000)) + goto fail; +#endif + + channel_count = 2; + + /* build the VGMSTREAM */ + vgmstream = allocate_vgmstream(channel_count,loop_flag); + if (!vgmstream) goto fail; + + /* fill in the vital statistics */ + start_offset = 0x800; + vgmstream->channels = channel_count; + vgmstream->sample_rate = read_32bitLE(0x4,streamFile); + vgmstream->coding_type = coding_PCM16LE; + vgmstream->num_samples = (get_streamfile_size(streamFile)-start_offset)/2/channel_count; + if (loop_flag) { + vgmstream->loop_start_sample = 0; + vgmstream->loop_end_sample = (get_streamfile_size(streamFile)-start_offset)/2/channel_count; + } + + vgmstream->layout_type = layout_interleave; + vgmstream->interleave_block_size = read_32bitLE(0xC,streamFile); + vgmstream->meta_type = meta_DC_STR_V2; + + /* 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; +} |