#include "coding.h" #include "../streamfile.h" #include #ifdef VGM_USE_FFMPEG /** * Transmogrifies custom Opus (no Ogg layer and custom packet headers) into is Xiph Opus, creating * valid Ogg pages with single Opus packets. * Uses an intermediate buffer to make full Ogg pages, since checksums are calculated with the whole page. * * Mostly as an experiment/demonstration, until some details are sorted out before adding actual libopus. * * Info, CRC and stuff: * https://www.opus-codec.org/docs/ * https://tools.ietf.org/html/rfc7845.html * https://github.com/hcs64/ww2ogg */ typedef enum { OPUS_SWITCH, OPUS_UE4_v1, OPUS_UE4_v2, OPUS_EA, OPUS_X } opus_type_t; static size_t make_oggs_first(uint8_t *buf, int buf_size, opus_config *cfg); static size_t make_oggs_page(uint8_t *buf, int buf_size, size_t data_size, int page_sequence, int granule); static size_t opus_get_packet_samples(const uint8_t *buf, int len); static size_t opus_get_packet_samples_sf(STREAMFILE *sf, off_t offset); static size_t get_xopus_packet_size(int packet, STREAMFILE *streamfile); static opus_type_t get_ue4opus_version(STREAMFILE *sf, off_t offset); typedef struct { /* config */ opus_type_t type; off_t stream_offset; size_t stream_size; /* state */ off_t logical_offset; /* offset that corresponds to physical_offset */ off_t physical_offset; /* actual file offset */ size_t block_size; /* current block size */ size_t page_size; /* current OggS page size */ uint8_t page_buffer[0x2000]; /* OggS page (observed max is ~0xc00) */ size_t sequence; /* OggS sequence */ size_t samples_done; /* OggS granule */ uint8_t head_buffer[0x100]; /* OggS head page */ size_t head_size; /* OggS head page size */ size_t logical_size; } opus_io_data; /* Convers custom Opus packets to Ogg Opus, so the resulting data is larger than physical data. */ static size_t opus_io_read(STREAMFILE *streamfile, uint8_t *dest, off_t offset, size_t length, opus_io_data* data) { size_t total_read = 0; /* ignore bad reads */ if (offset < 0 || offset > data->logical_size) { return total_read; } /* previous offset: re-start as we can't map logical<>physical offsets */ if (offset < data->logical_offset) { data->physical_offset = data->stream_offset; data->logical_offset = 0x00; data->page_size = 0; data->samples_done = 0; data->sequence = 2; /* appended header is 0/1 */ if (offset >= data->head_size) data->logical_offset = data->head_size; } /* insert fake header */ if (offset < data->head_size) { size_t bytes_consumed, to_read; bytes_consumed = offset - data->logical_offset; to_read = data->head_size - bytes_consumed; if (to_read > length) to_read = length; memcpy(dest, data->head_buffer + bytes_consumed, to_read); total_read += to_read; dest += to_read; offset += to_read; length -= to_read; data->logical_offset += to_read; } /* read blocks, one at a time */ while (length > 0) { /* ignore EOF */ if (data->logical_offset >= data->logical_size) { break; } /* process new block */ if (data->page_size == 0) { size_t data_size, skip_size, oggs_size, packet_samples = 0; switch(data->type) { case OPUS_SWITCH: /* format seem to come from opus_test and not Nintendo-specific */ data_size = read_u32be(data->physical_offset, streamfile); skip_size = 0x08; /* size + Opus state(?) */ break; case OPUS_UE4_v1: data_size = read_u16le(data->physical_offset, streamfile); skip_size = 0x02; break; case OPUS_UE4_v2: data_size = read_u16le(data->physical_offset + 0x00, streamfile); packet_samples = read_u16le(data->physical_offset + 0x02, streamfile); skip_size = 0x02 + 0x02; break; case OPUS_EA: data_size = read_u16be(data->physical_offset, streamfile); skip_size = 0x02; break; case OPUS_X: data_size = get_xopus_packet_size(data->sequence - 2, streamfile); skip_size = 0; break; default: return 0; } oggs_size = 0x1b + (int)(data_size / 0xFF + 1); /* OggS page: base size + lacing values */ data->block_size = data_size + skip_size; data->page_size = oggs_size + data_size; if (data->page_size > sizeof(data->page_buffer)) { /* happens on bad reads/EOF too */ VGM_LOG("OPUS: buffer can't hold OggS at %x\n", (uint32_t)data->physical_offset); data->page_size = 0; break; } /* create fake OggS page (full page for checksums) */ read_streamfile(data->page_buffer+oggs_size, data->physical_offset + skip_size, data_size, streamfile); /* store page data */ if (packet_samples == 0) packet_samples = opus_get_packet_samples(data->page_buffer + oggs_size, data_size); data->samples_done += packet_samples; make_oggs_page(data->page_buffer, sizeof(data->page_buffer), data_size, data->sequence, data->samples_done); data->sequence++; } /* move to next block */ if (offset >= data->logical_offset + data->page_size) { data->physical_offset += data->block_size; data->logical_offset += data->page_size; data->page_size = 0; continue; } /* read data */ { size_t bytes_consumed, to_read; bytes_consumed = offset - data->logical_offset; to_read = data->page_size - bytes_consumed; if (to_read > length) to_read = length; memcpy(dest, data->page_buffer + bytes_consumed, to_read); total_read += to_read; dest += to_read; offset += to_read; length -= to_read; if (to_read == 0) { break; /* error/EOF */ } } } return total_read; } static size_t opus_io_size(STREAMFILE *streamfile, opus_io_data* data) { off_t physical_offset, max_physical_offset; size_t logical_size = 0; int packet = 0; if (data->logical_size) return data->logical_size; if (data->stream_offset + data->stream_size > get_streamfile_size(streamfile)) { VGM_LOG("OPUS: wrong streamsize %x + %x vs %x\n", (uint32_t)data->stream_offset, data->stream_size, get_streamfile_size(streamfile)); return 0; } physical_offset = data->stream_offset; max_physical_offset = data->stream_offset + data->stream_size; logical_size = data->head_size; /* get size of the logical stream */ while (physical_offset < max_physical_offset) { size_t data_size, skip_size, oggs_size; switch(data->type) { case OPUS_SWITCH: data_size = read_u32be(physical_offset, streamfile); skip_size = 0x08; break; case OPUS_UE4_v1: data_size = read_u16le(physical_offset, streamfile); skip_size = 0x02; break; case OPUS_UE4_v2: data_size = read_u16le(physical_offset, streamfile); skip_size = 0x02 + 0x02; break; case OPUS_EA: data_size = read_u16be(physical_offset, streamfile); skip_size = 0x02; break; case OPUS_X: data_size = get_xopus_packet_size(packet, streamfile); skip_size = 0x00; break; default: return 0; } if (data_size == 0 ) { VGM_LOG("OPUS: data_size is 0 at %x\n", (uint32_t)physical_offset); return 0; /* bad rip? or could 'break' and truck along */ } oggs_size = 0x1b + (int)(data_size / 0xFF + 1); /* OggS page: base size + lacing values */ physical_offset += data_size + skip_size; logical_size += oggs_size + data_size; packet++; } /* logical size can be bigger though */ if (physical_offset > get_streamfile_size(streamfile)) { VGM_LOG("OPUS: wrong size\n"); return 0; } data->logical_size = logical_size; return data->logical_size; } /* Prepares custom IO for custom Opus, that is converted to Ogg Opus on the fly */ static STREAMFILE* setup_opus_streamfile(STREAMFILE *streamFile, opus_config *cfg, off_t stream_offset, size_t stream_size, opus_type_t type) { STREAMFILE *temp_streamFile = NULL, *new_streamFile = NULL; opus_io_data io_data = {0}; size_t io_data_size = sizeof(opus_io_data); io_data.type = type; io_data.stream_offset = stream_offset; io_data.stream_size = stream_size; io_data.physical_offset = stream_offset; io_data.head_size = make_oggs_first(io_data.head_buffer, sizeof(io_data.head_buffer), cfg); if (!io_data.head_size) goto fail; io_data.sequence = 2; io_data.logical_size = opus_io_size(streamFile, &io_data); /* force init */ /* setup subfile */ new_streamFile = open_wrap_streamfile(streamFile); if (!new_streamFile) goto fail; temp_streamFile = new_streamFile; new_streamFile = open_io_streamfile(temp_streamFile, &io_data,io_data_size, opus_io_read,opus_io_size); if (!new_streamFile) goto fail; temp_streamFile = new_streamFile; new_streamFile = open_buffer_streamfile(new_streamFile,0); if (!new_streamFile) goto fail; temp_streamFile = new_streamFile; return temp_streamFile; fail: close_streamfile(temp_streamFile); return NULL; } /* ******************************** */ /* from ww2ogg - from Tremor (lowmem) */ static uint32_t crc_lookup[256]={ 0x00000000,0x04c11db7,0x09823b6e,0x0d4326d9, 0x130476dc,0x17c56b6b,0x1a864db2,0x1e475005, 0x2608edb8,0x22c9f00f,0x2f8ad6d6,0x2b4bcb61, 0x350c9b64,0x31cd86d3,0x3c8ea00a,0x384fbdbd, 0x4c11db70,0x48d0c6c7,0x4593e01e,0x4152fda9, 0x5f15adac,0x5bd4b01b,0x569796c2,0x52568b75, 0x6a1936c8,0x6ed82b7f,0x639b0da6,0x675a1011, 0x791d4014,0x7ddc5da3,0x709f7b7a,0x745e66cd, 0x9823b6e0,0x9ce2ab57,0x91a18d8e,0x95609039, 0x8b27c03c,0x8fe6dd8b,0x82a5fb52,0x8664e6e5, 0xbe2b5b58,0xbaea46ef,0xb7a96036,0xb3687d81, 0xad2f2d84,0xa9ee3033,0xa4ad16ea,0xa06c0b5d, 0xd4326d90,0xd0f37027,0xddb056fe,0xd9714b49, 0xc7361b4c,0xc3f706fb,0xceb42022,0xca753d95, 0xf23a8028,0xf6fb9d9f,0xfbb8bb46,0xff79a6f1, 0xe13ef6f4,0xe5ffeb43,0xe8bccd9a,0xec7dd02d, 0x34867077,0x30476dc0,0x3d044b19,0x39c556ae, 0x278206ab,0x23431b1c,0x2e003dc5,0x2ac12072, 0x128e9dcf,0x164f8078,0x1b0ca6a1,0x1fcdbb16, 0x018aeb13,0x054bf6a4,0x0808d07d,0x0cc9cdca, 0x7897ab07,0x7c56b6b0,0x71159069,0x75d48dde, 0x6b93dddb,0x6f52c06c,0x6211e6b5,0x66d0fb02, 0x5e9f46bf,0x5a5e5b08,0x571d7dd1,0x53dc6066, 0x4d9b3063,0x495a2dd4,0x44190b0d,0x40d816ba, 0xaca5c697,0xa864db20,0xa527fdf9,0xa1e6e04e, 0xbfa1b04b,0xbb60adfc,0xb6238b25,0xb2e29692, 0x8aad2b2f,0x8e6c3698,0x832f1041,0x87ee0df6, 0x99a95df3,0x9d684044,0x902b669d,0x94ea7b2a, 0xe0b41de7,0xe4750050,0xe9362689,0xedf73b3e, 0xf3b06b3b,0xf771768c,0xfa325055,0xfef34de2, 0xc6bcf05f,0xc27dede8,0xcf3ecb31,0xcbffd686, 0xd5b88683,0xd1799b34,0xdc3abded,0xd8fba05a, 0x690ce0ee,0x6dcdfd59,0x608edb80,0x644fc637, 0x7a089632,0x7ec98b85,0x738aad5c,0x774bb0eb, 0x4f040d56,0x4bc510e1,0x46863638,0x42472b8f, 0x5c007b8a,0x58c1663d,0x558240e4,0x51435d53, 0x251d3b9e,0x21dc2629,0x2c9f00f0,0x285e1d47, 0x36194d42,0x32d850f5,0x3f9b762c,0x3b5a6b9b, 0x0315d626,0x07d4cb91,0x0a97ed48,0x0e56f0ff, 0x1011a0fa,0x14d0bd4d,0x19939b94,0x1d528623, 0xf12f560e,0xf5ee4bb9,0xf8ad6d60,0xfc6c70d7, 0xe22b20d2,0xe6ea3d65,0xeba91bbc,0xef68060b, 0xd727bbb6,0xd3e6a601,0xdea580d8,0xda649d6f, 0xc423cd6a,0xc0e2d0dd,0xcda1f604,0xc960ebb3, 0xbd3e8d7e,0xb9ff90c9,0xb4bcb610,0xb07daba7, 0xae3afba2,0xaafbe615,0xa7b8c0cc,0xa379dd7b, 0x9b3660c6,0x9ff77d71,0x92b45ba8,0x9675461f, 0x8832161a,0x8cf30bad,0x81b02d74,0x857130c3, 0x5d8a9099,0x594b8d2e,0x5408abf7,0x50c9b640, 0x4e8ee645,0x4a4ffbf2,0x470cdd2b,0x43cdc09c, 0x7b827d21,0x7f436096,0x7200464f,0x76c15bf8, 0x68860bfd,0x6c47164a,0x61043093,0x65c52d24, 0x119b4be9,0x155a565e,0x18197087,0x1cd86d30, 0x029f3d35,0x065e2082,0x0b1d065b,0x0fdc1bec, 0x3793a651,0x3352bbe6,0x3e119d3f,0x3ad08088, 0x2497d08d,0x2056cd3a,0x2d15ebe3,0x29d4f654, 0xc5a92679,0xc1683bce,0xcc2b1d17,0xc8ea00a0, 0xd6ad50a5,0xd26c4d12,0xdf2f6bcb,0xdbee767c, 0xe3a1cbc1,0xe760d676,0xea23f0af,0xeee2ed18, 0xf0a5bd1d,0xf464a0aa,0xf9278673,0xfde69bc4, 0x89b8fd09,0x8d79e0be,0x803ac667,0x84fbdbd0, 0x9abc8bd5,0x9e7d9662,0x933eb0bb,0x97ffad0c, 0xafb010b1,0xab710d06,0xa6322bdf,0xa2f33668, 0xbcb4666d,0xb8757bda,0xb5365d03,0xb1f740b4 }; /* from ww2ogg */ static uint32_t get_oggs_checksum(uint8_t * data, int bytes) { uint32_t crc_reg=0; int i; for(i=0;i> 24)&0xff)^data[i]]; return crc_reg; } /* from opus_decoder.c's opus_packet_get_samples_per_frame */ static uint32_t opus_packet_get_samples_per_frame(const uint8_t * data, int Fs) { int audiosize; if (data[0]&0x80) { audiosize = ((data[0]>>3)&0x3); audiosize = (Fs<>3)&0x3); if (audiosize == 3) audiosize = Fs*60/1000; else audiosize = (Fs< buf_size) { VGM_LOG("OPUS: buffer can't hold OggS page\n"); goto fail; } segment_count = (int)(data_size / 0xFF + 1); put_32bitBE(buf+0x00, 0x4F676753); /* capture pattern ("OggS") */ put_8bit (buf+0x04, 0); /* stream structure version, fixed */ put_8bit (buf+0x05, header_type_flag); /* bitflags (0: normal, continued = 1, first = 2, last = 4) */ put_32bitLE(buf+0x06, (uint32_t)(absolute_granule >> 0 & 0xFFFFFFFF)); /* lower */ put_32bitLE(buf+0x0A, (uint32_t)(absolute_granule >> 32 & 0xFFFFFFFF)); /* upper */ put_32bitLE(buf+0x0E, stream_serial_number); /* for interleaved multi-streams */ put_32bitLE(buf+0x12, page_sequence); put_32bitLE(buf+0x16, checksum); /* 0 for now, until all data is written */ put_8bit (buf+0x1A, segment_count); /* count of all lacing values */ /* segment table: size N in "lacing values" (ex. 0x20E=0xFF+FF+10; 0xFF=0xFF+00) */ page_done = 0x1B; while (lacing_done < data_size) { int bytes = data_size - lacing_done; if (bytes > 0xFF) bytes = 0xFF; put_8bit(buf+page_done, bytes); page_done++; lacing_done += bytes; if (lacing_done == data_size && bytes == 0xFF) { put_8bit(buf+page_done, 0x00); page_done++; } } /* data */ //memcpy(buf+page_done, data_buf, data_size); /* data must be copied before this call */ page_done += data_size; /* final checksum */ checksum = get_oggs_checksum(buf, page_done); put_32bitLE(buf+0x16, checksum); return page_done; fail: return 0; } static size_t make_opus_header(uint8_t * buf, int buf_size, opus_config *cfg) { size_t header_size = 0x13; int mapping_family = 0; /* special multichannel config */ if (cfg->channels > 2) { /* channel config: 0=standard (single stream mono/stereo), 1=vorbis, 255: not defined */ mapping_family = 1; header_size += 0x01+0x01+cfg->channels; } if (header_size > buf_size) { VGM_LOG("OPUS: buffer can't hold header\n"); goto fail; } put_32bitBE(buf+0x00, 0x4F707573); /* "Opus" header magic */ put_32bitBE(buf+0x04, 0x48656164); /* "Head" header magic */ put_8bit (buf+0x08, 1); /* version */ put_8bit (buf+0x09, cfg->channels); put_16bitLE(buf+0x0A, cfg->skip); put_32bitLE(buf+0x0c, cfg->sample_rate); put_16bitLE(buf+0x10, 0); /* output gain */ put_8bit (buf+0x12, mapping_family); if (mapping_family > 0) { int i; /* internal mono/stereo streams (N mono/stereo streams form M channels) */ put_8bit(buf+0x13, cfg->stream_count); /* joint stereo streams (rest would be mono, so 6ch can be 2ch+2ch+1ch+1ch = 2 coupled */ put_8bit(buf+0x14, cfg->coupled_count); /* mapping bits per channel? */ for (i = 0; i < cfg->channels; i++) { put_8bit(buf+0x15+i, cfg->channel_mapping[i]); } } return header_size; fail: return 0; } static size_t make_opus_comment(uint8_t * buf, int buf_size) { const char * vendor_string = "vgmstream"; const char * user_comment_0_string = "vgmstream Opus converter"; size_t comment_size; int vendor_string_length, user_comment_0_length; vendor_string_length = strlen(vendor_string); user_comment_0_length = strlen(user_comment_0_string); comment_size = 0x14 + vendor_string_length + user_comment_0_length; if (comment_size > buf_size) { VGM_LOG("OPUS: buffer can't hold comment\n"); goto fail; } put_32bitBE(buf+0x00, 0x4F707573); /* "Opus" header magic */ put_32bitBE(buf+0x04, 0x54616773); /* "Tags" header magic */ put_32bitLE(buf+0x08, vendor_string_length); memcpy (buf+0x0c, vendor_string, vendor_string_length); put_32bitLE(buf+0x0c + vendor_string_length+0x00, 1); /* user_comment_list_length */ put_32bitLE(buf+0x0c + vendor_string_length+0x04, user_comment_0_length); memcpy (buf+0x0c + vendor_string_length+0x08, user_comment_0_string, user_comment_0_length); return comment_size; fail: return 0; } static size_t make_oggs_first(uint8_t * buf, int buf_size, opus_config *cfg) { int buf_done = 0; size_t bytes; if (buf_size < 0x100) /* approx */ goto fail; /* make header */ bytes = make_opus_header(buf+buf_done + 0x1c,buf_size, cfg); make_oggs_page(buf+buf_done + 0x00,buf_size, bytes, 0, 0); buf_done += 0x1c + bytes; /* make comment */ bytes = make_opus_comment(buf+buf_done + 0x1c,buf_size); make_oggs_page(buf+buf_done + 0x00,buf_size, bytes, 1, 0); buf_done += 0x1c + bytes; return buf_done; fail: return 0; } static size_t opus_get_packet_samples(const uint8_t * buf, int len) { return opus_packet_get_nb_frames(buf, len) * opus_packet_get_samples_per_frame(buf, 48000); } static size_t opus_get_packet_samples_sf(STREAMFILE *sf, off_t offset) { uint8_t buf[0x04]; /* at least 0x02 */ read_streamfile(buf, offset, sizeof(buf), sf); return opus_get_packet_samples(buf, sizeof(buf)); } /************************** */ static size_t get_xopus_packet_size(int packet, STREAMFILE * streamfile) { /* XOPUS has a packet size table at the beginning, get size from there. * Maybe should copy the table during setup to avoid IO, but all XOPUS are * quite small so it isn't very noticeable. */ return read_u16le(0x20 + packet*0x02, streamfile); } static size_t custom_opus_get_samples(off_t offset, size_t stream_size, STREAMFILE *sf, opus_type_t type) { size_t num_samples = 0; off_t end_offset = offset + stream_size; int packet = 0; if (end_offset > get_streamfile_size(sf)) { VGM_LOG("OPUS: wrong end offset found\n"); end_offset = get_streamfile_size(sf); } /* count by reading all frames */ while (offset < end_offset) { size_t data_size, skip_size, packet_samples = 0; switch(type) { case OPUS_SWITCH: data_size = read_u32be(offset, sf); skip_size = 0x08; break; case OPUS_UE4_v1: data_size = read_u16le(offset, sf); skip_size = 0x02; break; case OPUS_UE4_v2: data_size = read_u16le(offset + 0x00, sf); packet_samples = read_u16le(offset + 0x02, sf); skip_size = 0x02 + 0x02; break; case OPUS_EA: data_size = read_u16be(offset, sf); skip_size = 0x02; break; case OPUS_X: data_size = get_xopus_packet_size(packet, sf); skip_size = 0x00; break; default: return 0; } if (packet_samples == 0) packet_samples = opus_get_packet_samples_sf(sf, offset + skip_size); num_samples += packet_samples; offset += skip_size + data_size; packet++; } return num_samples; } size_t switch_opus_get_samples(off_t offset, size_t stream_size, STREAMFILE *streamFile) { return custom_opus_get_samples(offset, stream_size, streamFile, OPUS_SWITCH); } static size_t custom_opus_get_encoder_delay(off_t offset, STREAMFILE *sf, opus_type_t type) { size_t skip_size, packet_samples = 0; switch(type) { case OPUS_SWITCH: skip_size = 0x08; break; case OPUS_UE4_v1: skip_size = 0x02; break; case OPUS_UE4_v2: packet_samples = read_u16le(offset + 0x02, sf); skip_size = 0x02 + 0x02; break; case OPUS_EA: skip_size = 0x02; break; case OPUS_X: skip_size = 0x00; break; default: return 0; } if (packet_samples == 0) packet_samples = opus_get_packet_samples_sf(sf, offset + skip_size); /* encoder delay seems fixed to 1/8 of samples per frame, but may need more testing */ return packet_samples / 8; } size_t switch_opus_get_encoder_delay(off_t offset, STREAMFILE *streamFile) { return custom_opus_get_encoder_delay(offset, streamFile, OPUS_SWITCH); } size_t ue4_opus_get_encoder_delay(off_t offset, STREAMFILE *streamFile) { return custom_opus_get_encoder_delay(offset, streamFile, get_ue4opus_version(streamFile, offset)); } size_t ea_opus_get_encoder_delay(off_t offset, STREAMFILE *streamFile) { return custom_opus_get_encoder_delay(offset, streamFile, OPUS_EA); } /* ******************************************************* */ /* actual FFmpeg only-code starts here (the above is universal enough but no point to compile) */ //#ifdef VGM_USE_FFMPEG static ffmpeg_codec_data * init_ffmpeg_custom_opus_config(STREAMFILE *streamFile, off_t start_offset, size_t data_size, opus_config *cfg, opus_type_t type) { ffmpeg_codec_data * ffmpeg_data = NULL; STREAMFILE *temp_streamFile = NULL; temp_streamFile = setup_opus_streamfile(streamFile, cfg, start_offset, data_size, type); if (!temp_streamFile) goto fail; ffmpeg_data = init_ffmpeg_offset(temp_streamFile, 0x00,get_streamfile_size(temp_streamFile)); if (!ffmpeg_data) goto fail; /* FFmpeg + libopus: skips samples, notifies skip in codecCtx->delay (not in stream->skip_samples) * FFmpeg + opus: *doesn't* skip, also notifies skip in codecCtx->delay, hurray (possibly fixed in recent versions) * FFmpeg + opus is audibly buggy with some low bitrate SSB Ultimate files too */ //if (ffmpeg_data->skipSamples <= 0) { // ffmpeg_set_skip_samples(ffmpeg_data, skip); //} close_streamfile(temp_streamFile); return ffmpeg_data; fail: close_streamfile(temp_streamFile); return NULL; } static ffmpeg_codec_data * init_ffmpeg_custom_opus(STREAMFILE *streamFile, off_t start_offset, size_t data_size, int channels, int skip, int sample_rate, opus_type_t type) { opus_config cfg = {0}; cfg.channels = channels; cfg.skip = skip; cfg.sample_rate = sample_rate; return init_ffmpeg_custom_opus_config(streamFile, start_offset, data_size, &cfg, type); } ffmpeg_codec_data * init_ffmpeg_switch_opus_config(STREAMFILE *streamFile, off_t start_offset, size_t data_size, opus_config* cfg) { return init_ffmpeg_custom_opus_config(streamFile, start_offset, data_size, cfg, OPUS_SWITCH); } ffmpeg_codec_data * init_ffmpeg_switch_opus(STREAMFILE *streamFile, off_t start_offset, size_t data_size, int channels, int skip, int sample_rate) { return init_ffmpeg_custom_opus(streamFile, start_offset, data_size, channels, skip, sample_rate, OPUS_SWITCH); } ffmpeg_codec_data * init_ffmpeg_ue4_opus(STREAMFILE *streamFile, off_t start_offset, size_t data_size, int channels, int skip, int sample_rate) { return init_ffmpeg_custom_opus(streamFile, start_offset, data_size, channels, skip, sample_rate, get_ue4opus_version(streamFile, start_offset)); } ffmpeg_codec_data * init_ffmpeg_ea_opus(STREAMFILE *streamFile, off_t start_offset, size_t data_size, int channels, int skip, int sample_rate) { return init_ffmpeg_custom_opus(streamFile, start_offset, data_size, channels, skip, sample_rate, OPUS_EA); } ffmpeg_codec_data * init_ffmpeg_x_opus(STREAMFILE *streamFile, off_t start_offset, size_t data_size, int channels, int skip, int sample_rate) { return init_ffmpeg_custom_opus(streamFile, start_offset, data_size, channels, skip, sample_rate, OPUS_X); } static opus_type_t get_ue4opus_version(STREAMFILE *sf, off_t offset) { int read_samples, calc_samples; /* UE4OPUS v2 has packet samples right after packet size, check if data follows this */ read_samples = read_u16le(offset + 0x02, sf); calc_samples = opus_get_packet_samples_sf(sf, offset + 0x04); if (read_samples > 0 && read_samples == calc_samples) return OPUS_UE4_v2; else return OPUS_UE4_v1; } #endif