#include "meta.h" #include "../coding/coding.h" /* .ISB - Creative ISACT (Interactive Spatial Audio Composition Tools) middleware [Psychonauts (PC), Mass Effect (multi)] */ VGMSTREAM* init_vgmstream_isb(STREAMFILE* sf) { VGMSTREAM* vgmstream = NULL; off_t start_offset = 0, name_offset = 0, nfld_offset = 0; size_t stream_size = 0, name_size = 0, nfld_size = 0; int loop_flag = 0, channels = 0, sample_rate = 0, codec = 0, pcm_bytes = 0, bps = 0; int total_subsongs, target_subsong = sf->stream_index; uint32_t (*read_u32me)(off_t,STREAMFILE*); uint32_t (*read_u32ce)(off_t,STREAMFILE*); int big_endian; /* checks */ if (!check_extensions(sf, "isb")) goto fail; big_endian = read_u32be(0x00,sf) == get_id32be("FFIR"); /* PS3, most X360 */ read_u32me = big_endian ? read_u32be : read_u32le; /* machine endianness... */ read_u32ce = big_endian ? read_u32le : read_u32be; /* chunks change with endianness but this just reads as BE */ if (read_u32ce(0x00,sf) != get_id32be("RIFF")) goto fail; if (read_u32me(0x04,sf) + 0x08 != get_streamfile_size(sf)) goto fail; if (read_u32ce(0x08,sf) != get_id32be("isbf")) goto fail; /* some files have a companion .icb, seems to be a cue file pointing here */ /* format is RIFF with many custom chunks, apparently for their DAW-like editor with * complex functions, but most seem always included by default and unused, and games * seems to use the format as a simple audio bank. Psychonauts Xbox/PS2 doesn't use ISACT. */ { off_t offset, max_offset, header_offset = 0, suboffset, submax_offset; size_t header_size = 0; total_subsongs = 0; /* not specified */ if (target_subsong == 0) target_subsong = 1; /* parse base RIFF */ offset = 0x0c; max_offset = get_streamfile_size(sf); while (offset < max_offset) { uint32_t chunk_type = read_u32ce(offset + 0x00,sf); uint32_t chunk_size = read_u32me(offset + 0x04,sf); offset += 0x08; switch(chunk_type) { case 0x4C495354: /* "LIST" */ if (read_u32ce(offset, sf) == get_id32be("samp")) { /* sample header */ total_subsongs++; if (target_subsong == total_subsongs && header_offset == 0) { header_offset = offset; header_size = chunk_size; } } else if (read_u32ce(offset, sf) == get_id32be("fldr")) { /* subfolder with another LIST inside, for example "stingers" > N smpl (seen in some music_bank) */ off_t current_nfld_offset = 0; size_t current_nfld_size = 0; suboffset = offset + 0x04; submax_offset = offset + chunk_size; while (suboffset < submax_offset) { uint32_t subchunk_type = read_u32ce(suboffset + 0x00,sf); uint32_t subchunk_size = read_u32me(suboffset + 0x04,sf); suboffset += 0x08; if (subchunk_type == get_id32be("titl")) { /* should go first in fldr*/ current_nfld_offset = suboffset; current_nfld_size = subchunk_size; } else if (subchunk_type == get_id32be("LIST")) { uint32_t subsubchunk_type = read_u32ce(suboffset, sf); if (subsubchunk_type == get_id32be("samp")) { total_subsongs++; if (target_subsong == total_subsongs && header_offset == 0) { header_offset = suboffset; header_size = chunk_size; nfld_offset = current_nfld_offset; nfld_size = current_nfld_size; } } else if (subsubchunk_type == get_id32be("fldr")) { VGM_LOG("ISB: subfolder with subfolder at %lx\n", suboffset); goto fail; } //break; /* there can be N subLIST+samps */ } suboffset += subchunk_size; } } break; default: /* most are common chunks at the start that seem to contain defaults */ break; } offset += chunk_size; /* no chunk 1-byte padding */ } if (target_subsong < 0 || target_subsong > total_subsongs || total_subsongs < 1) goto fail; if (header_offset == 0) goto fail; /* parse header inside LIST */ offset = header_offset + 0x04; max_offset = offset + header_size; while (offset < max_offset) { uint32_t chunk_type = read_u32ce(offset + 0x00,sf); uint32_t chunk_size = read_u32me(offset + 0x04,sf); offset += 0x08; switch(chunk_type) { case 0x7469746C: /* "titl" */ name_offset = offset; name_size = chunk_size; break; case 0x63686E6B: /* "chnk" */ channels = read_u32me(offset + 0x00, sf); break; case 0x73696E66: /* "sinf" */ /* 0x00: null? */ /* 0x04: some value? */ sample_rate = read_u32me(offset + 0x08, sf); pcm_bytes = read_u32me(offset + 0x0c, sf); bps = read_u16le(offset + 0x10, sf); /* 0x12: some value? */ break; case 0x636D7069: /* "cmpi" */ codec = read_u32me(offset + 0x00, sf); if (read_u32me(offset + 0x04, sf) != codec) { VGM_LOG("ISB: unknown compression repeat\n"); goto fail; } /* 0x08: extra value for some codecs? */ /* 0x0c: block size when codec is XBOX-IMA */ /* 0x10: null? */ /* 0x14: flags? */ break; case 0x64617461: /* "data" */ start_offset = offset; stream_size = chunk_size; break; default: /* most of the same default chunks */ break; } offset += chunk_size; } if (start_offset == 0) goto fail; } /* some files are marked with "loop" but have value 0? */ loop_flag = 0; /* build the VGMSTREAM */ vgmstream = allocate_vgmstream(channels, loop_flag); if (!vgmstream) goto fail; vgmstream->meta_type = meta_ISB; vgmstream->sample_rate = sample_rate; vgmstream->num_streams = total_subsongs; vgmstream->stream_size = stream_size; if (name_offset) { /* UTF16 but only uses lower bytes */ char name[256]; char nfld[256]; /* should read string or set '\0' is no size is set/incorrect */ if (name_size >= sizeof(name)) name_size = sizeof(name) - 1; read_string_utf16(name, name_size, name_offset, sf, big_endian); if (nfld_size >= sizeof(nfld)) nfld_size = sizeof(nfld) - 1; read_string_utf16(nfld, nfld_size, nfld_offset, sf, big_endian); if (nfld[0] && name[0]) { snprintf(vgmstream->stream_name,STREAM_NAME_SIZE, "%s/%s", nfld, name); } else if (name[0]) { snprintf(vgmstream->stream_name,STREAM_NAME_SIZE, "%s", name); } /* there is also a "titl" for the bank, but it's just the filename so probably unwanted */ } switch(codec) { case 0x00: if (bps == 8) { vgmstream->coding_type = coding_PCM8_U; vgmstream->layout_type = layout_interleave; vgmstream->interleave_block_size = 0x01; } else { vgmstream->coding_type = coding_PCM16LE; vgmstream->layout_type = layout_interleave; vgmstream->interleave_block_size = 0x02; } vgmstream->num_samples = pcm_bytes_to_samples(stream_size, channels, bps); /* unsure about pcm_bytes */ break; case 0x01: vgmstream->coding_type = coding_XBOX_IMA; vgmstream->layout_type = layout_none; vgmstream->num_samples = xbox_ima_bytes_to_samples(stream_size, channels); /* pcm_bytes has excess data */ break; #ifdef VGM_USE_VORBIS case 0x02: vgmstream->codec_data = init_ogg_vorbis(sf, start_offset, stream_size, NULL); if (!vgmstream->codec_data) goto fail; vgmstream->coding_type = coding_OGG_VORBIS; vgmstream->layout_type = layout_none; vgmstream->num_samples = pcm_bytes / channels / (bps/8); break; #endif #ifdef VGM_USE_FFMPEG case 0x04: { off_t fmt_offset = start_offset; size_t fmt_size = 0x20; start_offset += fmt_size; stream_size -= fmt_size; /* XMA1 "fmt" chunk (BE, unlike the usual LE) */ vgmstream->codec_data = init_ffmpeg_xma_chunk(sf, start_offset, stream_size, fmt_offset, fmt_size); if (!vgmstream->codec_data) goto fail; vgmstream->coding_type = coding_FFmpeg; vgmstream->layout_type = layout_none; vgmstream->num_samples = pcm_bytes / channels / (bps/8); xma_fix_raw_samples(vgmstream, sf, start_offset, stream_size, fmt_offset, 1,1); break; } #endif case 0x05: { //TODO: improve VGMSTREAM *temp_vgmstream = NULL; STREAMFILE *temp_sf = NULL; temp_sf = setup_subfile_streamfile(sf, start_offset, stream_size, "msf"); if (!temp_sf) goto fail; temp_vgmstream = init_vgmstream_msf(temp_sf); if (temp_vgmstream) { temp_vgmstream->num_streams = vgmstream->num_streams; temp_vgmstream->stream_size = vgmstream->stream_size; temp_vgmstream->meta_type = vgmstream->meta_type; strcpy(temp_vgmstream->stream_name, vgmstream->stream_name); close_streamfile(temp_sf); close_vgmstream(vgmstream); return temp_vgmstream; } else { close_streamfile(temp_sf); goto fail; } break; } default: /* according to press releases ISACT may support WMA */ VGM_LOG("ISB: unknown codec %i\n", codec); goto fail; } if (!vgmstream_open_stream(vgmstream, sf, start_offset)) goto fail; return vgmstream; fail: close_vgmstream(vgmstream); return NULL; }