/* * Matroska muxer * Copyright (c) 2007 David Conrad * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include "av1.h" #include "avc.h" #include "hevc.h" #include "avformat.h" #include "avio_internal.h" #include "avlanguage.h" #include "flacenc.h" #include "internal.h" #include "isom.h" #include "matroska.h" #include "riff.h" #include "subtitles.h" #include "vorbiscomment.h" #include "wv.h" #include "libavutil/avstring.h" #include "libavutil/channel_layout.h" #include "libavutil/crc.h" #include "libavutil/dict.h" #include "libavutil/intfloat.h" #include "libavutil/intreadwrite.h" #include "libavutil/lfg.h" #include "libavutil/mastering_display_metadata.h" #include "libavutil/mathematics.h" #include "libavutil/opt.h" #include "libavutil/parseutils.h" #include "libavutil/random_seed.h" #include "libavutil/rational.h" #include "libavutil/samplefmt.h" #include "libavutil/sha.h" #include "libavutil/stereo3d.h" #include "libavcodec/xiph.h" #include "libavcodec/mpeg4audio.h" #include "libavcodec/internal.h" typedef struct ebml_master { int64_t pos; ///< absolute offset in the file where the master's elements start int sizebytes; ///< how many bytes were reserved for the size } ebml_master; typedef struct mkv_seekhead_entry { unsigned int elementid; uint64_t segmentpos; } mkv_seekhead_entry; typedef struct mkv_seekhead { int64_t filepos; int64_t segment_offset; ///< the file offset to the beginning of the segment int reserved_size; ///< -1 if appending to file int max_entries; mkv_seekhead_entry *entries; int num_entries; } mkv_seekhead; typedef struct mkv_cuepoint { uint64_t pts; int stream_idx; int tracknum; int64_t cluster_pos; ///< file offset of the cluster containing the block int64_t relative_pos; ///< relative offset from the position of the cluster containing the block int64_t duration; ///< duration of the block according to time base } mkv_cuepoint; typedef struct mkv_cues { int64_t segment_offset; mkv_cuepoint *entries; int num_entries; } mkv_cues; typedef struct mkv_track { int write_dts; int has_cue; int sample_rate; int64_t sample_rate_offset; int64_t codecpriv_offset; int64_t ts_offset; } mkv_track; typedef struct mkv_attachment { int stream_idx; uint32_t fileuid; } mkv_attachment; typedef struct mkv_attachments { mkv_attachment *entries; int num_entries; } mkv_attachments; #define MODE_MATROSKAv2 0x01 #define MODE_WEBM 0x02 /** Maximum number of tracks allowed in a Matroska file (with track numbers in * range 1 to 126 (inclusive) */ #define MAX_TRACKS 126 typedef struct MatroskaMuxContext { const AVClass *class; int mode; AVIOContext *dyn_bc; AVIOContext *tags_bc; ebml_master tags; AVIOContext *info_bc; ebml_master info; AVIOContext *tracks_bc; ebml_master tracks_master; ebml_master segment; int64_t segment_offset; ebml_master cluster; int64_t cluster_pos; ///< file offset of the current cluster int64_t cluster_pts; int64_t duration_offset; int64_t duration; mkv_seekhead *main_seekhead; mkv_cues *cues; mkv_track *tracks; mkv_attachments *attachments; AVPacket cur_audio_pkt; int have_attachments; int have_video; int reserve_cues_space; int cluster_size_limit; int64_t cues_pos; int64_t cluster_time_limit; int is_dash; int dash_track_number; int is_live; int write_crc; uint32_t chapter_id_offset; int wrote_chapters; int64_t last_track_timestamp[MAX_TRACKS]; int64_t* stream_durations; int64_t* stream_duration_offsets; int allow_raw_vfw; } MatroskaMuxContext; /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit * offset, 4 bytes for target EBML ID */ #define MAX_SEEKENTRY_SIZE 21 /** per-cuepoint-track - 5 1-byte EBML IDs, 5 1-byte EBML sizes, 4 * 8-byte uint max */ #define MAX_CUETRACKPOS_SIZE 42 /** per-cuepoint - 2 1-byte EBML IDs, 2 1-byte EBML sizes, 8-byte uint max */ #define MAX_CUEPOINT_SIZE(num_tracks) 12 + MAX_CUETRACKPOS_SIZE * num_tracks /** Seek preroll value for opus */ #define OPUS_SEEK_PREROLL 80000000 static int ebml_id_size(unsigned int id) { return (av_log2(id + 1) - 1) / 7 + 1; } static void put_ebml_id(AVIOContext *pb, unsigned int id) { int i = ebml_id_size(id); while (i--) avio_w8(pb, (uint8_t)(id >> (i * 8))); } /** * Write an EBML size meaning "unknown size". * * @param bytes The number of bytes the size should occupy (maximum: 8). */ static void put_ebml_size_unknown(AVIOContext *pb, int bytes) { av_assert0(bytes <= 8); avio_w8(pb, 0x1ff >> bytes); ffio_fill(pb, 0xff, bytes - 1); } /** * Calculate how many bytes are needed to represent a given number in EBML. */ static int ebml_num_size(uint64_t num) { int bytes = 1; while ((num + 1) >> bytes * 7) bytes++; return bytes; } /** * Write a number in EBML variable length format. * * @param bytes The number of bytes that need to be used to write the number. * If zero, any number of bytes can be used. */ static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes) { int i, needed_bytes = ebml_num_size(num); // sizes larger than this are currently undefined in EBML av_assert0(num < (1ULL << 56) - 1); if (bytes == 0) // don't care how many bytes are used, so use the min bytes = needed_bytes; // the bytes needed to write the given size would exceed the bytes // that we need to use, so write unknown size. This shouldn't happen. av_assert0(bytes >= needed_bytes); num |= 1ULL << bytes * 7; for (i = bytes - 1; i >= 0; i--) avio_w8(pb, (uint8_t)(num >> i * 8)); } static void put_ebml_uint(AVIOContext *pb, unsigned int elementid, uint64_t val) { int i, bytes = 1; uint64_t tmp = val; while (tmp >>= 8) bytes++; put_ebml_id(pb, elementid); put_ebml_num(pb, bytes, 0); for (i = bytes - 1; i >= 0; i--) avio_w8(pb, (uint8_t)(val >> i * 8)); } static void put_ebml_sint(AVIOContext *pb, unsigned int elementid, int64_t val) { int i, bytes = 1; uint64_t tmp = 2*(val < 0 ? val^-1 : val); while (tmp>>=8) bytes++; put_ebml_id(pb, elementid); put_ebml_num(pb, bytes, 0); for (i = bytes - 1; i >= 0; i--) avio_w8(pb, (uint8_t)(val >> i * 8)); } static void put_ebml_float(AVIOContext *pb, unsigned int elementid, double val) { put_ebml_id(pb, elementid); put_ebml_num(pb, 8, 0); avio_wb64(pb, av_double2int(val)); } static void put_ebml_binary(AVIOContext *pb, unsigned int elementid, const void *buf, int size) { put_ebml_id(pb, elementid); put_ebml_num(pb, size, 0); avio_write(pb, buf, size); } static void put_ebml_string(AVIOContext *pb, unsigned int elementid, const char *str) { put_ebml_binary(pb, elementid, str, strlen(str)); } /** * Write a void element of a given size. Useful for reserving space in * the file to be written to later. * * @param size The number of bytes to reserve, which must be at least 2. */ static void put_ebml_void(AVIOContext *pb, uint64_t size) { int64_t currentpos = avio_tell(pb); av_assert0(size >= 2); put_ebml_id(pb, EBML_ID_VOID); // we need to subtract the length needed to store the size from the // size we need to reserve so 2 cases, we use 8 bytes to store the // size if possible, 1 byte otherwise if (size < 10) put_ebml_num(pb, size - 2, 0); else put_ebml_num(pb, size - 9, 8); ffio_fill(pb, 0, currentpos + size - avio_tell(pb)); } static ebml_master start_ebml_master(AVIOContext *pb, unsigned int elementid, uint64_t expectedsize) { int bytes = expectedsize ? ebml_num_size(expectedsize) : 8; put_ebml_id(pb, elementid); put_ebml_size_unknown(pb, bytes); return (ebml_master) {avio_tell(pb), bytes }; } static void end_ebml_master(AVIOContext *pb, ebml_master master) { int64_t pos = avio_tell(pb); if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0) return; put_ebml_num(pb, pos - master.pos, master.sizebytes); avio_seek(pb, pos, SEEK_SET); } static int start_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv, ebml_master *master, unsigned int elementid, uint64_t expectedsize) { int ret; if ((ret = avio_open_dyn_buf(dyn_cp)) < 0) return ret; if (pb->seekable & AVIO_SEEKABLE_NORMAL) { *master = start_ebml_master(pb, elementid, expectedsize); if (mkv->write_crc && mkv->mode != MODE_WEBM) put_ebml_void(*dyn_cp, 6); /* Reserve space for CRC32 so position/size calculations using avio_tell() take it into account */ } else *master = start_ebml_master(*dyn_cp, elementid, expectedsize); return 0; } static void end_ebml_master_crc32(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv, ebml_master master) { uint8_t *buf, crc[4]; int size, skip = 0; if (pb->seekable & AVIO_SEEKABLE_NORMAL) { size = avio_close_dyn_buf(*dyn_cp, &buf); if (mkv->write_crc && mkv->mode != MODE_WEBM) { skip = 6; /* Skip reserved 6-byte long void element from the dynamic buffer. */ AV_WL32(crc, av_crc(av_crc_get_table(AV_CRC_32_IEEE_LE), UINT32_MAX, buf + skip, size - skip) ^ UINT32_MAX); put_ebml_binary(pb, EBML_ID_CRC32, crc, sizeof(crc)); } avio_write(pb, buf + skip, size - skip); end_ebml_master(pb, master); } else { end_ebml_master(*dyn_cp, master); size = avio_close_dyn_buf(*dyn_cp, &buf); avio_write(pb, buf, size); } av_free(buf); *dyn_cp = NULL; } /** * Complete ebml master whithout destroying the buffer, allowing for later updates */ static void end_ebml_master_crc32_preliminary(AVIOContext *pb, AVIOContext **dyn_cp, MatroskaMuxContext *mkv, ebml_master master) { if (pb->seekable & AVIO_SEEKABLE_NORMAL) { uint8_t *buf; int size = avio_get_dyn_buf(*dyn_cp, &buf); avio_write(pb, buf, size); end_ebml_master(pb, master); } } static void put_xiph_size(AVIOContext *pb, int size) { ffio_fill(pb, 255, size / 255); avio_w8(pb, size % 255); } /** * Free the members allocated in the mux context. */ static void mkv_free(MatroskaMuxContext *mkv) { uint8_t* buf; if (mkv->dyn_bc) { avio_close_dyn_buf(mkv->dyn_bc, &buf); av_free(buf); } if (mkv->info_bc) { avio_close_dyn_buf(mkv->info_bc, &buf); av_free(buf); } if (mkv->tracks_bc) { avio_close_dyn_buf(mkv->tracks_bc, &buf); av_free(buf); } if (mkv->tags_bc) { avio_close_dyn_buf(mkv->tags_bc, &buf); av_free(buf); } if (mkv->main_seekhead) { av_freep(&mkv->main_seekhead->entries); av_freep(&mkv->main_seekhead); } if (mkv->cues) { av_freep(&mkv->cues->entries); av_freep(&mkv->cues); } if (mkv->attachments) { av_freep(&mkv->attachments->entries); av_freep(&mkv->attachments); } av_freep(&mkv->tracks); av_freep(&mkv->stream_durations); av_freep(&mkv->stream_duration_offsets); } /** * Initialize a mkv_seekhead element to be ready to index level 1 Matroska * elements. If a maximum number of elements is specified, enough space * will be reserved at the current file location to write a seek head of * that size. * * @param segment_offset The absolute offset to the position in the file * where the segment begins. * @param numelements The maximum number of elements that will be indexed * by this seek head, 0 if unlimited. */ static mkv_seekhead *mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset, int numelements) { mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead)); if (!new_seekhead) return NULL; new_seekhead->segment_offset = segment_offset; if (numelements > 0) { new_seekhead->filepos = avio_tell(pb); // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID // and size, 6 bytes for a CRC32 element, and 3 bytes to guarantee // that an EBML void element will fit afterwards new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 19; new_seekhead->max_entries = numelements; put_ebml_void(pb, new_seekhead->reserved_size); } return new_seekhead; } static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, unsigned int elementid, uint64_t filepos) { mkv_seekhead_entry *entries = seekhead->entries; // don't store more elements than we reserved space for if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries) return -1; entries = av_realloc_array(entries, seekhead->num_entries + 1, sizeof(mkv_seekhead_entry)); if (!entries) return AVERROR(ENOMEM); seekhead->entries = entries; seekhead->entries[seekhead->num_entries].elementid = elementid; seekhead->entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset; return 0; } /** * Write the seek head to the file and free it. If a maximum number of * elements was specified to mkv_start_seekhead(), the seek head will * be written at the location reserved for it. Otherwise, it is written * at the current location in the file. * * @return The file offset where the seekhead was written, * -1 if an error occurred. */ static int64_t mkv_write_seekhead(AVIOContext *pb, MatroskaMuxContext *mkv) { AVIOContext *dyn_cp; mkv_seekhead *seekhead = mkv->main_seekhead; ebml_master metaseek, seekentry; int64_t currentpos; int i; currentpos = avio_tell(pb); if (seekhead->reserved_size > 0) { if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) { currentpos = -1; goto fail; } } if (start_ebml_master_crc32(pb, &dyn_cp, mkv, &metaseek, MATROSKA_ID_SEEKHEAD, seekhead->reserved_size) < 0) { currentpos = -1; goto fail; } for (i = 0; i < seekhead->num_entries; i++) { mkv_seekhead_entry *entry = &seekhead->entries[i]; seekentry = start_ebml_master(dyn_cp, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE); put_ebml_id(dyn_cp, MATROSKA_ID_SEEKID); put_ebml_num(dyn_cp, ebml_id_size(entry->elementid), 0); put_ebml_id(dyn_cp, entry->elementid); put_ebml_uint(dyn_cp, MATROSKA_ID_SEEKPOSITION, entry->segmentpos); end_ebml_master(dyn_cp, seekentry); } end_ebml_master_crc32(pb, &dyn_cp, mkv, metaseek); if (seekhead->reserved_size > 0) { uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb); put_ebml_void(pb, remaining); avio_seek(pb, currentpos, SEEK_SET); currentpos = seekhead->filepos; } fail: av_freep(&mkv->main_seekhead->entries); av_freep(&mkv->main_seekhead); return currentpos; } static mkv_cues *mkv_start_cues(int64_t segment_offset) { mkv_cues *cues = av_mallocz(sizeof(mkv_cues)); if (!cues) return NULL; cues->segment_offset = segment_offset; return cues; } static int mkv_add_cuepoint(mkv_cues *cues, int stream, int tracknum, int64_t ts, int64_t cluster_pos, int64_t relative_pos, int64_t duration) { mkv_cuepoint *entries = cues->entries; if (ts < 0) return 0; entries = av_realloc_array(entries, cues->num_entries + 1, sizeof(mkv_cuepoint)); if (!entries) return AVERROR(ENOMEM); cues->entries = entries; cues->entries[cues->num_entries].pts = ts; cues->entries[cues->num_entries].stream_idx = stream; cues->entries[cues->num_entries].tracknum = tracknum; cues->entries[cues->num_entries].cluster_pos = cluster_pos - cues->segment_offset; cues->entries[cues->num_entries].relative_pos = relative_pos; cues->entries[cues->num_entries++].duration = duration; return 0; } static int64_t mkv_write_cues(AVFormatContext *s, mkv_cues *cues, mkv_track *tracks, int num_tracks) { MatroskaMuxContext *mkv = s->priv_data; AVIOContext *dyn_cp, *pb = s->pb; ebml_master cues_element; int64_t currentpos; int i, j, ret; currentpos = avio_tell(pb); ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, &cues_element, MATROSKA_ID_CUES, 0); if (ret < 0) return ret; for (i = 0; i < cues->num_entries; i++) { ebml_master cuepoint, track_positions; mkv_cuepoint *entry = &cues->entries[i]; uint64_t pts = entry->pts; int ctp_nb = 0; // Calculate the number of entries, so we know the element size for (j = 0; j < num_tracks; j++) tracks[j].has_cue = 0; for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) { int tracknum = entry[j].stream_idx; av_assert0(tracknum>=0 && tracknumstreams[tracknum]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) continue; tracks[tracknum].has_cue = 1; ctp_nb ++; } cuepoint = start_ebml_master(dyn_cp, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(ctp_nb)); put_ebml_uint(dyn_cp, MATROSKA_ID_CUETIME, pts); // put all the entries from different tracks that have the exact same // timestamp into the same CuePoint for (j = 0; j < num_tracks; j++) tracks[j].has_cue = 0; for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) { int tracknum = entry[j].stream_idx; av_assert0(tracknum>=0 && tracknumstreams[tracknum]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE) continue; tracks[tracknum].has_cue = 1; track_positions = start_ebml_master(dyn_cp, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE); put_ebml_uint(dyn_cp, MATROSKA_ID_CUETRACK , entry[j].tracknum ); put_ebml_uint(dyn_cp, MATROSKA_ID_CUECLUSTERPOSITION , entry[j].cluster_pos); put_ebml_uint(dyn_cp, MATROSKA_ID_CUERELATIVEPOSITION, entry[j].relative_pos); if (entry[j].duration != -1) put_ebml_uint(dyn_cp, MATROSKA_ID_CUEDURATION , entry[j].duration); end_ebml_master(dyn_cp, track_positions); } i += j - 1; end_ebml_master(dyn_cp, cuepoint); } end_ebml_master_crc32(pb, &dyn_cp, mkv, cues_element); return currentpos; } static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par) { const uint8_t *header_start[3]; int header_len[3]; int first_header_size; int j; if (par->codec_id == AV_CODEC_ID_VORBIS) first_header_size = 30; else first_header_size = 42; if (avpriv_split_xiph_headers(par->extradata, par->extradata_size, first_header_size, header_start, header_len) < 0) { av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n"); return -1; } avio_w8(pb, 2); // number packets - 1 for (j = 0; j < 2; j++) { put_xiph_size(pb, header_len[j]); } for (j = 0; j < 3; j++) avio_write(pb, header_start[j], header_len[j]); return 0; } static int put_wv_codecpriv(AVIOContext *pb, AVCodecParameters *par) { if (par->extradata && par->extradata_size == 2) avio_write(pb, par->extradata, 2); else avio_wl16(pb, 0x403); // fallback to the version mentioned in matroska specs return 0; } static int put_flac_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par) { int write_comment = (par->channel_layout && !(par->channel_layout & ~0x3ffffULL) && !ff_flac_is_native_layout(par->channel_layout)); int ret = ff_flac_write_header(pb, par->extradata, par->extradata_size, !write_comment); if (ret < 0) return ret; if (write_comment) { const char *vendor = (s->flags & AVFMT_FLAG_BITEXACT) ? "Lavf" : LIBAVFORMAT_IDENT; AVDictionary *dict = NULL; uint8_t buf[32], *data, *p; int64_t len; snprintf(buf, sizeof(buf), "0x%"PRIx64, par->channel_layout); av_dict_set(&dict, "WAVEFORMATEXTENSIBLE_CHANNEL_MASK", buf, 0); len = ff_vorbiscomment_length(dict, vendor, NULL, 0); if (len >= ((1<<24) - 4)) { av_dict_free(&dict); return AVERROR(EINVAL); } data = av_malloc(len + 4); if (!data) { av_dict_free(&dict); return AVERROR(ENOMEM); } data[0] = 0x84; AV_WB24(data + 1, len); p = data + 4; ff_vorbiscomment_write(&p, &dict, vendor, NULL, 0); avio_write(pb, data, len + 4); av_freep(&data); av_dict_free(&dict); } return 0; } static int get_aac_sample_rates(AVFormatContext *s, uint8_t *extradata, int extradata_size, int *sample_rate, int *output_sample_rate) { MPEG4AudioConfig mp4ac; int ret; ret = avpriv_mpeg4audio_get_config(&mp4ac, extradata, extradata_size * 8, 1); /* Don't abort if the failure is because of missing extradata. Assume in that * case a bitstream filter will provide the muxer with the extradata in the * first packet. * Abort however if s->pb is not seekable, as we would not be able to seek back * to write the sample rate elements once the extradata shows up, anyway. */ if (ret < 0 && (extradata_size || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL))) { av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n"); return AVERROR(EINVAL); } if (ret < 0) { /* This will only happen when this function is called while writing the * header and no extradata is available. The space for this element has * to be reserved for when this function is called again after the * extradata shows up in the first packet, as there's no way to know if * output_sample_rate will be different than sample_rate or not. */ *output_sample_rate = *sample_rate; } else { *sample_rate = mp4ac.sample_rate; *output_sample_rate = mp4ac.ext_sample_rate; } return 0; } static int mkv_write_native_codecprivate(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, AVIOContext *dyn_cp) { switch (par->codec_id) { case AV_CODEC_ID_VORBIS: case AV_CODEC_ID_THEORA: return put_xiph_codecpriv(s, dyn_cp, par); case AV_CODEC_ID_FLAC: return put_flac_codecpriv(s, dyn_cp, par); case AV_CODEC_ID_WAVPACK: return put_wv_codecpriv(dyn_cp, par); case AV_CODEC_ID_H264: return ff_isom_write_avcc(dyn_cp, par->extradata, par->extradata_size); case AV_CODEC_ID_HEVC: ff_isom_write_hvcc(dyn_cp, par->extradata, par->extradata_size, 0); return 0; case AV_CODEC_ID_AV1: if (par->extradata_size) return ff_isom_write_av1c(dyn_cp, par->extradata, par->extradata_size); else put_ebml_void(pb, 4 + 3); break; case AV_CODEC_ID_ALAC: if (par->extradata_size < 36) { av_log(s, AV_LOG_ERROR, "Invalid extradata found, ALAC expects a 36-byte " "QuickTime atom."); return AVERROR_INVALIDDATA; } else avio_write(dyn_cp, par->extradata + 12, par->extradata_size - 12); break; case AV_CODEC_ID_AAC: if (par->extradata_size) avio_write(dyn_cp, par->extradata, par->extradata_size); else put_ebml_void(pb, MAX_PCE_SIZE + 2 + 4); break; default: if (par->codec_id == AV_CODEC_ID_PRORES && ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == AV_CODEC_ID_PRORES) { avio_wl32(dyn_cp, par->codec_tag); } else if (par->extradata_size && par->codec_id != AV_CODEC_ID_TTA) avio_write(dyn_cp, par->extradata, par->extradata_size); } return 0; } static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int native_id, int qt_id) { AVIOContext *dyn_cp; uint8_t *codecpriv; int ret, codecpriv_size; ret = avio_open_dyn_buf(&dyn_cp); if (ret < 0) return ret; if (native_id) { ret = mkv_write_native_codecprivate(s, pb, par, dyn_cp); } else if (par->codec_type == AVMEDIA_TYPE_VIDEO) { if (qt_id) { if (!par->codec_tag) par->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id); if ( ff_codec_get_id(ff_codec_movvideo_tags, par->codec_tag) == par->codec_id && (!par->extradata_size || ff_codec_get_id(ff_codec_movvideo_tags, AV_RL32(par->extradata + 4)) != par->codec_id) ) { int i; avio_wb32(dyn_cp, 0x5a + par->extradata_size); avio_wl32(dyn_cp, par->codec_tag); for(i = 0; i < 0x5a - 8; i++) avio_w8(dyn_cp, 0); } avio_write(dyn_cp, par->extradata, par->extradata_size); } else { if (!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id)) av_log(s, AV_LOG_WARNING, "codec %s is not supported by this format\n", avcodec_get_name(par->codec_id)); if (!par->codec_tag) par->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id); if (!par->codec_tag && par->codec_id != AV_CODEC_ID_RAWVIDEO) { av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n", avcodec_get_name(par->codec_id)); ret = AVERROR(EINVAL); } ff_put_bmp_header(dyn_cp, par, 0, 0); } } else if (par->codec_type == AVMEDIA_TYPE_AUDIO) { unsigned int tag; tag = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id); if (!tag) { av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n", avcodec_get_name(par->codec_id)); ret = AVERROR(EINVAL); } if (!par->codec_tag) par->codec_tag = tag; ff_put_wav_header(s, dyn_cp, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX); } codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv); if (codecpriv_size) put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv, codecpriv_size); av_free(codecpriv); return ret; } static int mkv_write_video_color(AVIOContext *pb, AVCodecParameters *par, AVStream *st) { AVIOContext *dyn_cp; uint8_t *colorinfo_ptr; int side_data_size = 0; int ret, colorinfo_size; const uint8_t *side_data; ret = avio_open_dyn_buf(&dyn_cp); if (ret < 0) return ret; if (par->color_trc != AVCOL_TRC_UNSPECIFIED && par->color_trc < AVCOL_TRC_NB) { put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORTRANSFERCHARACTERISTICS, par->color_trc); } if (par->color_space != AVCOL_SPC_UNSPECIFIED && par->color_space < AVCOL_SPC_NB) { put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMATRIXCOEFF, par->color_space); } if (par->color_primaries != AVCOL_PRI_UNSPECIFIED && par->color_primaries < AVCOL_PRI_NB) { put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORPRIMARIES, par->color_primaries); } if (par->color_range != AVCOL_RANGE_UNSPECIFIED && par->color_range < AVCOL_RANGE_NB) { put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORRANGE, par->color_range); } if (par->chroma_location != AVCHROMA_LOC_UNSPECIFIED && par->chroma_location <= AVCHROMA_LOC_TOP) { int xpos, ypos; avcodec_enum_to_chroma_pos(&xpos, &ypos, par->chroma_location); put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGHORZ, (xpos >> 7) + 1); put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORCHROMASITINGVERT, (ypos >> 7) + 1); } side_data = av_stream_get_side_data(st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL, &side_data_size); if (side_data_size) { const AVContentLightMetadata *metadata = (const AVContentLightMetadata*)side_data; put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXCLL, metadata->MaxCLL); put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOCOLORMAXFALL, metadata->MaxFALL); } side_data = av_stream_get_side_data(st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA, &side_data_size); if (side_data_size == sizeof(AVMasteringDisplayMetadata)) { ebml_master meta_element = start_ebml_master( dyn_cp, MATROSKA_ID_VIDEOCOLORMASTERINGMETA, 0); const AVMasteringDisplayMetadata *metadata = (const AVMasteringDisplayMetadata*)side_data; if (metadata->has_primaries) { put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RX, av_q2d(metadata->display_primaries[0][0])); put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_RY, av_q2d(metadata->display_primaries[0][1])); put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GX, av_q2d(metadata->display_primaries[1][0])); put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_GY, av_q2d(metadata->display_primaries[1][1])); put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BX, av_q2d(metadata->display_primaries[2][0])); put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_BY, av_q2d(metadata->display_primaries[2][1])); put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEX, av_q2d(metadata->white_point[0])); put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_WHITEY, av_q2d(metadata->white_point[1])); } if (metadata->has_luminance) { put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMAX, av_q2d(metadata->max_luminance)); put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOCOLOR_LUMINANCEMIN, av_q2d(metadata->min_luminance)); } end_ebml_master(dyn_cp, meta_element); } colorinfo_size = avio_close_dyn_buf(dyn_cp, &colorinfo_ptr); if (colorinfo_size) { ebml_master colorinfo = start_ebml_master(pb, MATROSKA_ID_VIDEOCOLOR, colorinfo_size); avio_write(pb, colorinfo_ptr, colorinfo_size); end_ebml_master(pb, colorinfo); } av_free(colorinfo_ptr); return 0; } static int mkv_write_video_projection(AVFormatContext *s, AVIOContext *pb, AVStream *st) { AVIOContext b; AVIOContext *dyn_cp; int side_data_size = 0; int ret, projection_size; uint8_t *projection_ptr; uint8_t private[20]; const AVSphericalMapping *spherical = (const AVSphericalMapping *)av_stream_get_side_data(st, AV_PKT_DATA_SPHERICAL, &side_data_size); if (!side_data_size) return 0; ret = avio_open_dyn_buf(&dyn_cp); if (ret < 0) return ret; switch (spherical->projection) { case AV_SPHERICAL_EQUIRECTANGULAR: put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONTYPE, MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR); break; case AV_SPHERICAL_EQUIRECTANGULAR_TILE: ffio_init_context(&b, private, 20, 1, NULL, NULL, NULL, NULL); put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONTYPE, MATROSKA_VIDEO_PROJECTION_TYPE_EQUIRECTANGULAR); avio_wb32(&b, 0); // version + flags avio_wb32(&b, spherical->bound_top); avio_wb32(&b, spherical->bound_bottom); avio_wb32(&b, spherical->bound_left); avio_wb32(&b, spherical->bound_right); put_ebml_binary(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPRIVATE, private, avio_tell(&b)); break; case AV_SPHERICAL_CUBEMAP: ffio_init_context(&b, private, 12, 1, NULL, NULL, NULL, NULL); put_ebml_uint(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONTYPE, MATROSKA_VIDEO_PROJECTION_TYPE_CUBEMAP); avio_wb32(&b, 0); // version + flags avio_wb32(&b, 0); // layout avio_wb32(&b, spherical->padding); put_ebml_binary(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPRIVATE, private, avio_tell(&b)); break; default: av_log(s, AV_LOG_WARNING, "Unknown projection type\n"); goto end; } if (spherical->yaw) put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPOSEYAW, (double) spherical->yaw / (1 << 16)); if (spherical->pitch) put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPOSEPITCH, (double) spherical->pitch / (1 << 16)); if (spherical->roll) put_ebml_float(dyn_cp, MATROSKA_ID_VIDEOPROJECTIONPOSEROLL, (double) spherical->roll / (1 << 16)); end: projection_size = avio_close_dyn_buf(dyn_cp, &projection_ptr); if (projection_size) { ebml_master projection = start_ebml_master(pb, MATROSKA_ID_VIDEOPROJECTION, projection_size); avio_write(pb, projection_ptr, projection_size); end_ebml_master(pb, projection); } av_freep(&projection_ptr); return 0; } static void mkv_write_field_order(AVIOContext *pb, int mode, enum AVFieldOrder field_order) { switch (field_order) { case AV_FIELD_UNKNOWN: break; case AV_FIELD_PROGRESSIVE: put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED, MATROSKA_VIDEO_INTERLACE_FLAG_PROGRESSIVE); break; case AV_FIELD_TT: case AV_FIELD_BB: case AV_FIELD_TB: case AV_FIELD_BT: put_ebml_uint(pb, MATROSKA_ID_VIDEOFLAGINTERLACED, MATROSKA_VIDEO_INTERLACE_FLAG_INTERLACED); if (mode != MODE_WEBM) { switch (field_order) { case AV_FIELD_TT: put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER, MATROSKA_VIDEO_FIELDORDER_TT); break; case AV_FIELD_BB: put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER, MATROSKA_VIDEO_FIELDORDER_BB); break; case AV_FIELD_TB: put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER, MATROSKA_VIDEO_FIELDORDER_TB); break; case AV_FIELD_BT: put_ebml_uint(pb, MATROSKA_ID_VIDEOFIELDORDER, MATROSKA_VIDEO_FIELDORDER_BT); break; } } } } static int mkv_write_stereo_mode(AVFormatContext *s, AVIOContext *pb, AVStream *st, int mode, int *h_width, int *h_height) { int i; int ret = 0; AVDictionaryEntry *tag; MatroskaVideoStereoModeType format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB; *h_width = 1; *h_height = 1; // convert metadata into proper side data and add it to the stream if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) || (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) { int stereo_mode = atoi(tag->value); for (i=0; ivalue, ff_matroska_video_stereo_mode[i])){ stereo_mode = i; break; } if (stereo_mode < MATROSKA_VIDEO_STEREOMODE_TYPE_NB && stereo_mode != 10 && stereo_mode != 12) { int ret = ff_mkv_stereo3d_conv(st, stereo_mode); if (ret < 0) return ret; } } // iterate to find the stereo3d side data for (i = 0; i < st->nb_side_data; i++) { AVPacketSideData sd = st->side_data[i]; if (sd.type == AV_PKT_DATA_STEREO3D) { AVStereo3D *stereo = (AVStereo3D *)sd.data; switch (stereo->type) { case AV_STEREO3D_2D: format = MATROSKA_VIDEO_STEREOMODE_TYPE_MONO; break; case AV_STEREO3D_SIDEBYSIDE: format = (stereo->flags & AV_STEREO3D_FLAG_INVERT) ? MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT : MATROSKA_VIDEO_STEREOMODE_TYPE_LEFT_RIGHT; *h_width = 2; break; case AV_STEREO3D_TOPBOTTOM: format = MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM; if (stereo->flags & AV_STEREO3D_FLAG_INVERT) format--; *h_height = 2; break; case AV_STEREO3D_CHECKERBOARD: format = MATROSKA_VIDEO_STEREOMODE_TYPE_CHECKERBOARD_LR; if (stereo->flags & AV_STEREO3D_FLAG_INVERT) format--; break; case AV_STEREO3D_LINES: format = MATROSKA_VIDEO_STEREOMODE_TYPE_ROW_INTERLEAVED_LR; if (stereo->flags & AV_STEREO3D_FLAG_INVERT) format--; *h_height = 2; break; case AV_STEREO3D_COLUMNS: format = MATROSKA_VIDEO_STEREOMODE_TYPE_COL_INTERLEAVED_LR; if (stereo->flags & AV_STEREO3D_FLAG_INVERT) format--; *h_width = 2; break; case AV_STEREO3D_FRAMESEQUENCE: format = MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_LR; if (stereo->flags & AV_STEREO3D_FLAG_INVERT) format++; break; } break; } } if (format == MATROSKA_VIDEO_STEREOMODE_TYPE_NB) return ret; // if webm, do not write unsupported modes if ((mode == MODE_WEBM && format > MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM && format != MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT) || format >= MATROSKA_VIDEO_STEREOMODE_TYPE_NB) { av_log(s, AV_LOG_ERROR, "The specified stereo mode is not valid.\n"); format = MATROSKA_VIDEO_STEREOMODE_TYPE_NB; return AVERROR(EINVAL); } // write StereoMode if format is valid put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, format); return ret; } static int mkv_write_track(AVFormatContext *s, MatroskaMuxContext *mkv, int i, AVIOContext *pb, int default_stream_exists) { AVStream *st = s->streams[i]; AVCodecParameters *par = st->codecpar; ebml_master subinfo, track; int native_id = 0; int qt_id = 0; int bit_depth = av_get_bits_per_sample(par->codec_id); int sample_rate = par->sample_rate; int output_sample_rate = 0; int display_width_div = 1; int display_height_div = 1; int j, ret; AVDictionaryEntry *tag; if (par->codec_type == AVMEDIA_TYPE_ATTACHMENT) { mkv->have_attachments = 1; return 0; } if (par->codec_type == AVMEDIA_TYPE_AUDIO) { if (!bit_depth && par->codec_id != AV_CODEC_ID_ADPCM_G726) { if (par->bits_per_raw_sample) bit_depth = par->bits_per_raw_sample; else bit_depth = av_get_bytes_per_sample(par->format) << 3; } if (!bit_depth) bit_depth = par->bits_per_coded_sample; } if (par->codec_id == AV_CODEC_ID_AAC) { ret = get_aac_sample_rates(s, par->extradata, par->extradata_size, &sample_rate, &output_sample_rate); if (ret < 0) return ret; } track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0); put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER, mkv->is_dash ? mkv->dash_track_number : i + 1); put_ebml_uint (pb, MATROSKA_ID_TRACKUID, mkv->is_dash ? mkv->dash_track_number : i + 1); put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet) if ((tag = av_dict_get(st->metadata, "title", NULL, 0))) put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value); tag = av_dict_get(st->metadata, "language", NULL, 0); if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) { put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag && tag->value ? tag->value:"und"); } else if (tag && tag->value) { put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag->value); } // The default value for TRACKFLAGDEFAULT is 1, so add element // if we need to clear it. if (default_stream_exists && !(st->disposition & AV_DISPOSITION_DEFAULT)) put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT)); if (st->disposition & AV_DISPOSITION_FORCED) put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1); if (mkv->mode == MODE_WEBM) { const char *codec_id; if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) { for (j = 0; ff_webm_codec_tags[j].id != AV_CODEC_ID_NONE; j++) { if (ff_webm_codec_tags[j].id == par->codec_id) { codec_id = ff_webm_codec_tags[j].str; native_id = 1; break; } } } else if (par->codec_id == AV_CODEC_ID_WEBVTT) { if (st->disposition & AV_DISPOSITION_CAPTIONS) { codec_id = "D_WEBVTT/CAPTIONS"; native_id = MATROSKA_TRACK_TYPE_SUBTITLE; } else if (st->disposition & AV_DISPOSITION_DESCRIPTIONS) { codec_id = "D_WEBVTT/DESCRIPTIONS"; native_id = MATROSKA_TRACK_TYPE_METADATA; } else if (st->disposition & AV_DISPOSITION_METADATA) { codec_id = "D_WEBVTT/METADATA"; native_id = MATROSKA_TRACK_TYPE_METADATA; } else { codec_id = "D_WEBVTT/SUBTITLES"; native_id = MATROSKA_TRACK_TYPE_SUBTITLE; } } if (!native_id) { av_log(s, AV_LOG_ERROR, "Only VP8 or VP9 or AV1 video and Vorbis or Opus audio and WebVTT subtitles are supported for WebM.\n"); return AVERROR(EINVAL); } put_ebml_string(pb, MATROSKA_ID_CODECID, codec_id); } else { // look for a codec ID string specific to mkv to use, // if none are found, use AVI codes if (par->codec_id != AV_CODEC_ID_RAWVIDEO || par->codec_tag) { for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) { if (ff_mkv_codec_tags[j].id == par->codec_id && par->codec_id != AV_CODEC_ID_FFV1) { put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str); native_id = 1; break; } } } else { if (mkv->allow_raw_vfw) { native_id = 0; } else { av_log(s, AV_LOG_ERROR, "Raw RGB is not supported Natively in Matroska, you can use AVI or NUT or\n" "If you would like to store it anyway using VFW mode, enable allow_raw_vfw (-allow_raw_vfw 1)\n"); return AVERROR(EINVAL); } } } if (par->codec_type == AVMEDIA_TYPE_AUDIO && par->initial_padding && par->codec_id == AV_CODEC_ID_OPUS) { int64_t codecdelay = av_rescale_q(par->initial_padding, (AVRational){ 1, 48000 }, (AVRational){ 1, 1000000000 }); if (codecdelay < 0) { av_log(s, AV_LOG_ERROR, "Initial padding is invalid\n"); return AVERROR(EINVAL); } // mkv->tracks[i].ts_offset = av_rescale_q(par->initial_padding, // (AVRational){ 1, par->sample_rate }, // st->time_base); put_ebml_uint(pb, MATROSKA_ID_CODECDELAY, codecdelay); } if (par->codec_id == AV_CODEC_ID_OPUS) { put_ebml_uint(pb, MATROSKA_ID_SEEKPREROLL, OPUS_SEEK_PREROLL); } switch (par->codec_type) { case AVMEDIA_TYPE_VIDEO: mkv->have_video = 1; put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO); if( st->avg_frame_rate.num > 0 && st->avg_frame_rate.den > 0 && av_cmp_q(av_inv_q(st->avg_frame_rate), st->time_base) > 0) put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1000000000LL * st->avg_frame_rate.den / st->avg_frame_rate.num); if (!native_id && ff_codec_get_tag(ff_codec_movvideo_tags, par->codec_id) && ((!ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id) && par->codec_id != AV_CODEC_ID_RAWVIDEO) || par->codec_id == AV_CODEC_ID_SVQ1 || par->codec_id == AV_CODEC_ID_SVQ3 || par->codec_id == AV_CODEC_ID_CINEPAK)) qt_id = 1; if (qt_id) put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME"); else if (!native_id) { // if there is no mkv-specific codec ID, use VFW mode put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC"); mkv->tracks[i].write_dts = 1; s->internal->avoid_negative_ts_use_pts = 0; } subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0); put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , par->width); put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, par->height); mkv_write_field_order(pb, mkv->mode, par->field_order); // check both side data and metadata for stereo information, // write the result to the bitstream if any is found ret = mkv_write_stereo_mode(s, pb, st, mkv->mode, &display_width_div, &display_height_div); if (ret < 0) return ret; if (((tag = av_dict_get(st->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) || ((tag = av_dict_get( s->metadata, "alpha_mode", NULL, 0)) && atoi(tag->value)) || (par->format == AV_PIX_FMT_YUVA420P)) { put_ebml_uint(pb, MATROSKA_ID_VIDEOALPHAMODE, 1); } // write DisplayWidth and DisplayHeight, they contain the size of // a single source view and/or the display aspect ratio if (st->sample_aspect_ratio.num) { int64_t d_width = av_rescale(par->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den); if (d_width > INT_MAX) { av_log(s, AV_LOG_ERROR, "Overflow in display width\n"); return AVERROR(EINVAL); } if (d_width != par->width || display_width_div != 1 || display_height_div != 1) { if (mkv->mode == MODE_WEBM || display_width_div != 1 || display_height_div != 1) { put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width / display_width_div); put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div); } else { AVRational display_aspect_ratio; av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den, par->width * (int64_t)st->sample_aspect_ratio.num, par->height * (int64_t)st->sample_aspect_ratio.den, 1024 * 1024); put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH, display_aspect_ratio.num); put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, display_aspect_ratio.den); put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_DAR); } } } else if (display_width_div != 1 || display_height_div != 1) { put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , par->width / display_width_div); put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, par->height / display_height_div); } else if (mkv->mode != MODE_WEBM) put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, MATROSKA_VIDEO_DISPLAYUNIT_UNKNOWN); if (par->codec_id == AV_CODEC_ID_RAWVIDEO) { uint32_t color_space = av_le2ne32(par->codec_tag); put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space)); } ret = mkv_write_video_color(pb, par, st); if (ret < 0) return ret; ret = mkv_write_video_projection(s, pb, st); if (ret < 0) return ret; end_ebml_master(pb, subinfo); break; case AVMEDIA_TYPE_AUDIO: put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO); if (!native_id) // no mkv-specific ID, use ACM mode put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM"); subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0); put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , par->channels); mkv->tracks[i].sample_rate_offset = avio_tell(pb); put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate); if (output_sample_rate) put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate); if (bit_depth) put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth); end_ebml_master(pb, subinfo); break; case AVMEDIA_TYPE_SUBTITLE: if (!native_id) { av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", par->codec_id); return AVERROR(ENOSYS); } if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) native_id = MATROSKA_TRACK_TYPE_SUBTITLE; put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, native_id); break; default: av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n"); return AVERROR(EINVAL); } if (mkv->mode != MODE_WEBM || par->codec_id != AV_CODEC_ID_WEBVTT) { mkv->tracks[i].codecpriv_offset = avio_tell(pb); ret = mkv_write_codecprivate(s, pb, par, native_id, qt_id); if (ret < 0) return ret; } end_ebml_master(pb, track); return 0; } static int mkv_write_tracks(AVFormatContext *s) { MatroskaMuxContext *mkv = s->priv_data; AVIOContext *pb = s->pb; int i, ret, default_stream_exists = 0; ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb)); if (ret < 0) return ret; ret = start_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, &mkv->tracks_master, MATROSKA_ID_TRACKS, 0); if (ret < 0) return ret; for (i = 0; i < s->nb_streams; i++) { AVStream *st = s->streams[i]; default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT; } for (i = 0; i < s->nb_streams; i++) { ret = mkv_write_track(s, mkv, i, mkv->tracks_bc, default_stream_exists); if (ret < 0) return ret; } if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) end_ebml_master_crc32_preliminary(pb, &mkv->tracks_bc, mkv, mkv->tracks_master); else end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, mkv->tracks_master); return 0; } static int mkv_write_chapters(AVFormatContext *s) { MatroskaMuxContext *mkv = s->priv_data; AVIOContext *dyn_cp, *pb = s->pb; ebml_master chapters, editionentry; AVRational scale = {1, 1E9}; int i, ret; if (!s->nb_chapters || mkv->wrote_chapters) return 0; ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb)); if (ret < 0) return ret; ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, &chapters, MATROSKA_ID_CHAPTERS, 0); if (ret < 0) return ret; editionentry = start_ebml_master(dyn_cp, MATROSKA_ID_EDITIONENTRY, 0); if (mkv->mode != MODE_WEBM) { put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGDEFAULT, 1); put_ebml_uint(dyn_cp, MATROSKA_ID_EDITIONFLAGHIDDEN , 0); } for (i = 0; i < s->nb_chapters; i++) { ebml_master chapteratom, chapterdisplay; AVChapter *c = s->chapters[i]; int64_t chapterstart = av_rescale_q(c->start, c->time_base, scale); int64_t chapterend = av_rescale_q(c->end, c->time_base, scale); AVDictionaryEntry *t = NULL; if (chapterstart < 0 || chapterstart > chapterend || chapterend < 0) { av_log(s, AV_LOG_ERROR, "Invalid chapter start (%"PRId64") or end (%"PRId64").\n", chapterstart, chapterend); return AVERROR_INVALIDDATA; } chapteratom = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERATOM, 0); put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERUID, c->id + mkv->chapter_id_offset); put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMESTART, chapterstart); put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERTIMEEND, chapterend); if (mkv->mode != MODE_WEBM) { put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0); put_ebml_uint(dyn_cp, MATROSKA_ID_CHAPTERFLAGENABLED, 1); } if ((t = av_dict_get(c->metadata, "title", NULL, 0))) { chapterdisplay = start_ebml_master(dyn_cp, MATROSKA_ID_CHAPTERDISPLAY, 0); put_ebml_string(dyn_cp, MATROSKA_ID_CHAPSTRING, t->value); put_ebml_string(dyn_cp, MATROSKA_ID_CHAPLANG , "und"); end_ebml_master(dyn_cp, chapterdisplay); } end_ebml_master(dyn_cp, chapteratom); } end_ebml_master(dyn_cp, editionentry); end_ebml_master_crc32(pb, &dyn_cp, mkv, chapters); mkv->wrote_chapters = 1; return 0; } static int mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t) { uint8_t *key = av_strdup(t->key); uint8_t *p = key; const uint8_t *lang = NULL; ebml_master tag; if (!key) return AVERROR(ENOMEM); if ((p = strrchr(p, '-')) && (lang = ff_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL))) *p = 0; p = key; while (*p) { if (*p == ' ') *p = '_'; else if (*p >= 'a' && *p <= 'z') *p -= 'a' - 'A'; p++; } tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0); put_ebml_string(pb, MATROSKA_ID_TAGNAME, key); if (lang) put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang); put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value); end_ebml_master(pb, tag); av_freep(&key); return 0; } static int mkv_write_tag_targets(AVFormatContext *s, unsigned int elementid, unsigned int uid, ebml_master *tags, ebml_master* tag) { AVIOContext *pb; MatroskaMuxContext *mkv = s->priv_data; ebml_master targets; int ret; if (!tags->pos) { ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb)); if (ret < 0) return ret; start_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, tags, MATROSKA_ID_TAGS, 0); } pb = mkv->tags_bc; *tag = start_ebml_master(pb, MATROSKA_ID_TAG, 0); targets = start_ebml_master(pb, MATROSKA_ID_TAGTARGETS, 0); if (elementid) put_ebml_uint(pb, elementid, uid); end_ebml_master(pb, targets); return 0; } static int mkv_check_tag_name(const char *name, unsigned int elementid) { return av_strcasecmp(name, "title") && av_strcasecmp(name, "stereo_mode") && av_strcasecmp(name, "creation_time") && av_strcasecmp(name, "encoding_tool") && av_strcasecmp(name, "duration") && (elementid != MATROSKA_ID_TAGTARGETS_TRACKUID || av_strcasecmp(name, "language")) && (elementid != MATROSKA_ID_TAGTARGETS_ATTACHUID || (av_strcasecmp(name, "filename") && av_strcasecmp(name, "mimetype"))); } static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid, unsigned int uid, ebml_master *tags) { MatroskaMuxContext *mkv = s->priv_data; ebml_master tag; int ret; AVDictionaryEntry *t = NULL; ret = mkv_write_tag_targets(s, elementid, uid, tags, &tag); if (ret < 0) return ret; while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) { if (mkv_check_tag_name(t->key, elementid)) { ret = mkv_write_simpletag(mkv->tags_bc, t); if (ret < 0) return ret; } } end_ebml_master(mkv->tags_bc, tag); return 0; } static int mkv_check_tag(AVDictionary *m, unsigned int elementid) { AVDictionaryEntry *t = NULL; while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) if (mkv_check_tag_name(t->key, elementid)) return 1; return 0; } static int mkv_write_tags(AVFormatContext *s) { MatroskaMuxContext *mkv = s->priv_data; int i, ret; ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL); if (mkv_check_tag(s->metadata, 0)) { ret = mkv_write_tag(s, s->metadata, 0, 0, &mkv->tags); if (ret < 0) return ret; } for (i = 0; i < s->nb_streams; i++) { AVStream *st = s->streams[i]; if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT) continue; if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID)) continue; ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &mkv->tags); if (ret < 0) return ret; } if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) { for (i = 0; i < s->nb_streams; i++) { AVIOContext *pb; AVStream *st = s->streams[i]; ebml_master tag_target; ebml_master tag; if (st->codecpar->codec_type == AVMEDIA_TYPE_ATTACHMENT) continue; mkv_write_tag_targets(s, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &mkv->tags, &tag_target); pb = mkv->tags_bc; tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0); put_ebml_string(pb, MATROSKA_ID_TAGNAME, "DURATION"); mkv->stream_duration_offsets[i] = avio_tell(pb); // Reserve space to write duration as a 20-byte string. // 2 (ebml id) + 1 (data size) + 20 (data) put_ebml_void(pb, 23); end_ebml_master(pb, tag); end_ebml_master(pb, tag_target); } } if (mkv->mode != MODE_WEBM) { for (i = 0; i < s->nb_chapters; i++) { AVChapter *ch = s->chapters[i]; if (!mkv_check_tag(ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID)) continue; ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id + mkv->chapter_id_offset, &mkv->tags); if (ret < 0) return ret; } } if (mkv->have_attachments && mkv->mode != MODE_WEBM) { for (i = 0; i < mkv->attachments->num_entries; i++) { mkv_attachment *attachment = &mkv->attachments->entries[i]; AVStream *st = s->streams[attachment->stream_idx]; if (!mkv_check_tag(st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID)) continue; ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_ATTACHUID, attachment->fileuid, &mkv->tags); if (ret < 0) return ret; } } if (mkv->tags.pos) { if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) end_ebml_master_crc32_preliminary(s->pb, &mkv->tags_bc, mkv, mkv->tags); else end_ebml_master_crc32(s->pb, &mkv->tags_bc, mkv, mkv->tags); } return 0; } static int mkv_write_attachments(AVFormatContext *s) { MatroskaMuxContext *mkv = s->priv_data; AVIOContext *dyn_cp, *pb = s->pb; ebml_master attachments; AVLFG c; int i, ret; if (!mkv->have_attachments) return 0; mkv->attachments = av_mallocz(sizeof(*mkv->attachments)); if (!mkv->attachments) return AVERROR(ENOMEM); av_lfg_init(&c, av_get_random_seed()); ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb)); if (ret < 0) return ret; ret = start_ebml_master_crc32(pb, &dyn_cp, mkv, &attachments, MATROSKA_ID_ATTACHMENTS, 0); if (ret < 0) return ret; for (i = 0; i < s->nb_streams; i++) { AVStream *st = s->streams[i]; ebml_master attached_file; mkv_attachment *attachment = mkv->attachments->entries; AVDictionaryEntry *t; const char *mimetype = NULL; uint32_t fileuid; if (st->codecpar->codec_type != AVMEDIA_TYPE_ATTACHMENT) continue; attachment = av_realloc_array(attachment, mkv->attachments->num_entries + 1, sizeof(mkv_attachment)); if (!attachment) return AVERROR(ENOMEM); mkv->attachments->entries = attachment; attached_file = start_ebml_master(dyn_cp, MATROSKA_ID_ATTACHEDFILE, 0); if (t = av_dict_get(st->metadata, "title", NULL, 0)) put_ebml_string(dyn_cp, MATROSKA_ID_FILEDESC, t->value); if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) { av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i); return AVERROR(EINVAL); } put_ebml_string(dyn_cp, MATROSKA_ID_FILENAME, t->value); if (t = av_dict_get(st->metadata, "mimetype", NULL, 0)) mimetype = t->value; else if (st->codecpar->codec_id != AV_CODEC_ID_NONE ) { int i; for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) if (ff_mkv_mime_tags[i].id == st->codecpar->codec_id) { mimetype = ff_mkv_mime_tags[i].str; break; } for (i = 0; ff_mkv_image_mime_tags[i].id != AV_CODEC_ID_NONE; i++) if (ff_mkv_image_mime_tags[i].id == st->codecpar->codec_id) { mimetype = ff_mkv_image_mime_tags[i].str; break; } } if (!mimetype) { av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and " "it cannot be deduced from the codec id.\n", i); return AVERROR(EINVAL); } if (s->flags & AVFMT_FLAG_BITEXACT) { struct AVSHA *sha = av_sha_alloc(); uint8_t digest[20]; if (!sha) return AVERROR(ENOMEM); av_sha_init(sha, 160); av_sha_update(sha, st->codecpar->extradata, st->codecpar->extradata_size); av_sha_final(sha, digest); av_free(sha); fileuid = AV_RL32(digest); } else { fileuid = av_lfg_get(&c); } av_log(s, AV_LOG_VERBOSE, "Using %.8"PRIx32" for attachment %d\n", fileuid, mkv->attachments->num_entries); put_ebml_string(dyn_cp, MATROSKA_ID_FILEMIMETYPE, mimetype); put_ebml_binary(dyn_cp, MATROSKA_ID_FILEDATA, st->codecpar->extradata, st->codecpar->extradata_size); put_ebml_uint(dyn_cp, MATROSKA_ID_FILEUID, fileuid); end_ebml_master(dyn_cp, attached_file); mkv->attachments->entries[mkv->attachments->num_entries].stream_idx = i; mkv->attachments->entries[mkv->attachments->num_entries++].fileuid = fileuid; } end_ebml_master_crc32(pb, &dyn_cp, mkv, attachments); return 0; } static int64_t get_metadata_duration(AVFormatContext *s) { int i = 0; int64_t max = 0; int64_t us; AVDictionaryEntry *explicitDuration = av_dict_get(s->metadata, "DURATION", NULL, 0); if (explicitDuration && (av_parse_time(&us, explicitDuration->value, 1) == 0) && us > 0) { av_log(s, AV_LOG_DEBUG, "get_metadata_duration found duration in context metadata: %" PRId64 "\n", us); return us; } for (i = 0; i < s->nb_streams; i++) { int64_t us; AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata, "DURATION", NULL, 0); if (duration && (av_parse_time(&us, duration->value, 1) == 0)) max = FFMAX(max, us); } av_log(s, AV_LOG_DEBUG, "get_metadata_duration returned: %" PRId64 "\n", max); return max; } static int mkv_write_header(AVFormatContext *s) { MatroskaMuxContext *mkv = s->priv_data; AVIOContext *pb = s->pb; ebml_master ebml_header; AVDictionaryEntry *tag; int ret, i, version = 2; int64_t creation_time; if (!strcmp(s->oformat->name, "webm")) mkv->mode = MODE_WEBM; else mkv->mode = MODE_MATROSKAv2; if (mkv->mode != MODE_WEBM || av_dict_get(s->metadata, "stereo_mode", NULL, 0) || av_dict_get(s->metadata, "alpha_mode", NULL, 0)) version = 4; for (i = 0; i < s->nb_streams; i++) { if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_OPUS || av_dict_get(s->streams[i]->metadata, "stereo_mode", NULL, 0) || av_dict_get(s->streams[i]->metadata, "alpha_mode", NULL, 0)) version = 4; } mkv->tracks = av_mallocz_array(s->nb_streams, sizeof(*mkv->tracks)); if (!mkv->tracks) { ret = AVERROR(ENOMEM); goto fail; } ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0); put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1); put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1); put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4); put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8); put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name); put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , version); put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2); end_ebml_master(pb, ebml_header); mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0); mkv->segment_offset = avio_tell(pb); // we write 2 seek heads - one at the end of the file to point to each // cluster, and one at the beginning to point to all other level one // elements (including the seek head at the end of the file), which // isn't more than 10 elements if we only write one of each other // currently defined level 1 element mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10); if (!mkv->main_seekhead) { ret = AVERROR(ENOMEM); goto fail; } ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb)); if (ret < 0) goto fail; ret = start_ebml_master_crc32(pb, &mkv->info_bc, mkv, &mkv->info, MATROSKA_ID_INFO, 0); if (ret < 0) return ret; pb = mkv->info_bc; put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000); if ((tag = av_dict_get(s->metadata, "title", NULL, 0))) put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value); if (!(s->flags & AVFMT_FLAG_BITEXACT)) { put_ebml_string(pb, MATROSKA_ID_MUXINGAPP, LIBAVFORMAT_IDENT); if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0))) put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value); else put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT); if (mkv->mode != MODE_WEBM) { uint32_t segment_uid[4]; AVLFG lfg; av_lfg_init(&lfg, av_get_random_seed()); for (i = 0; i < 4; i++) segment_uid[i] = av_lfg_get(&lfg); put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16); } } else { const char *ident = "Lavf"; put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , ident); put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, ident); } if (ff_parse_creation_time_metadata(s, &creation_time, 0) > 0) { // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds. int64_t date_utc = (creation_time - 978307200000000LL) * 1000; uint8_t date_utc_buf[8]; AV_WB64(date_utc_buf, date_utc); put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8); } // reserve space for the duration mkv->duration = 0; mkv->duration_offset = avio_tell(pb); if (!mkv->is_live) { int64_t metadata_duration = get_metadata_duration(s); if (s->duration > 0) { int64_t scaledDuration = av_rescale(s->duration, 1000, AV_TIME_BASE); put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration); av_log(s, AV_LOG_DEBUG, "Write early duration from recording time = %" PRIu64 "\n", scaledDuration); } else if (metadata_duration > 0) { int64_t scaledDuration = av_rescale(metadata_duration, 1000, AV_TIME_BASE); put_ebml_float(pb, MATROSKA_ID_DURATION, scaledDuration); av_log(s, AV_LOG_DEBUG, "Write early duration from metadata = %" PRIu64 "\n", scaledDuration); } else { put_ebml_void(pb, 11); // assumes double-precision float to be written } } if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) end_ebml_master_crc32_preliminary(s->pb, &mkv->info_bc, mkv, mkv->info); else end_ebml_master_crc32(s->pb, &mkv->info_bc, mkv, mkv->info); pb = s->pb; // initialize stream_duration fields mkv->stream_durations = av_mallocz(s->nb_streams * sizeof(int64_t)); mkv->stream_duration_offsets = av_mallocz(s->nb_streams * sizeof(int64_t)); if (!mkv->stream_durations || !mkv->stream_duration_offsets) { ret = AVERROR(ENOMEM); goto fail; } ret = mkv_write_tracks(s); if (ret < 0) goto fail; for (i = 0; i < s->nb_chapters; i++) mkv->chapter_id_offset = FFMAX(mkv->chapter_id_offset, 1LL - s->chapters[i]->id); ret = mkv_write_chapters(s); if (ret < 0) goto fail; if (mkv->mode != MODE_WEBM) { ret = mkv_write_attachments(s); if (ret < 0) goto fail; } ret = mkv_write_tags(s); if (ret < 0) goto fail; if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) mkv_write_seekhead(pb, mkv); mkv->cues = mkv_start_cues(mkv->segment_offset); if (!mkv->cues) { ret = AVERROR(ENOMEM); goto fail; } if (s->metadata_header_padding > 0) { if (s->metadata_header_padding == 1) s->metadata_header_padding++; put_ebml_void(pb, s->metadata_header_padding); } if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) { mkv->cues_pos = avio_tell(pb); if (mkv->reserve_cues_space == 1) mkv->reserve_cues_space++; put_ebml_void(pb, mkv->reserve_cues_space); } av_init_packet(&mkv->cur_audio_pkt); mkv->cur_audio_pkt.size = 0; mkv->cluster_pos = -1; avio_flush(pb); // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or // after 4k and on a keyframe if (pb->seekable & AVIO_SEEKABLE_NORMAL) { if (mkv->cluster_time_limit < 0) mkv->cluster_time_limit = 5000; if (mkv->cluster_size_limit < 0) mkv->cluster_size_limit = 5 * 1024 * 1024; } else { if (mkv->cluster_time_limit < 0) mkv->cluster_time_limit = 1000; if (mkv->cluster_size_limit < 0) mkv->cluster_size_limit = 32 * 1024; } return 0; fail: mkv_free(mkv); return ret; } static int mkv_blockgroup_size(int pkt_size) { int size = pkt_size + 4; size += ebml_num_size(size); size += 2; // EBML ID for block and block duration size += 9; // max size of block duration incl. length field return size; } static int mkv_strip_wavpack(const uint8_t *src, uint8_t **pdst, int *size) { uint8_t *dst; int srclen = *size; int offset = 0; int ret; dst = av_malloc(srclen); if (!dst) return AVERROR(ENOMEM); while (srclen >= WV_HEADER_SIZE) { WvHeader header; ret = ff_wv_parse_header(&header, src); if (ret < 0) goto fail; src += WV_HEADER_SIZE; srclen -= WV_HEADER_SIZE; if (srclen < header.blocksize) { ret = AVERROR_INVALIDDATA; goto fail; } if (header.initial) { AV_WL32(dst + offset, header.samples); offset += 4; } AV_WL32(dst + offset, header.flags); AV_WL32(dst + offset + 4, header.crc); offset += 8; if (!(header.initial && header.final)) { AV_WL32(dst + offset, header.blocksize); offset += 4; } memcpy(dst + offset, src, header.blocksize); src += header.blocksize; srclen -= header.blocksize; offset += header.blocksize; } *pdst = dst; *size = offset; return 0; fail: av_freep(&dst); return ret; } static void mkv_write_block(AVFormatContext *s, AVIOContext *pb, unsigned int blockid, AVPacket *pkt, int keyframe) { MatroskaMuxContext *mkv = s->priv_data; AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar; uint8_t *data = NULL, *side_data = NULL; int offset = 0, size = pkt->size, side_data_size = 0; int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts; uint64_t additional_id = 0; int64_t discard_padding = 0; uint8_t track_number = (mkv->is_dash ? mkv->dash_track_number : (pkt->stream_index + 1)); ebml_master block_group, block_additions, block_more; ts += mkv->tracks[pkt->stream_index].ts_offset; av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, " "pts %" PRId64 ", dts %" PRId64 ", duration %" PRId64 ", keyframe %d\n", avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration, keyframe != 0); if (par->codec_id == AV_CODEC_ID_H264 && par->extradata_size > 0 && (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) ff_avc_parse_nal_units_buf(pkt->data, &data, &size); else if (par->codec_id == AV_CODEC_ID_HEVC && par->extradata_size > 6 && (AV_RB24(par->extradata) == 1 || AV_RB32(par->extradata) == 1)) /* extradata is Annex B, assume the bitstream is too and convert it */ ff_hevc_annexb2mp4_buf(pkt->data, &data, &size, 0, NULL); else if (par->codec_id == AV_CODEC_ID_AV1) ff_av1_filter_obus_buf(pkt->data, &data, &size); else if (par->codec_id == AV_CODEC_ID_WAVPACK) { int ret = mkv_strip_wavpack(pkt->data, &data, &size); if (ret < 0) { av_log(s, AV_LOG_ERROR, "Error stripping a WavPack packet.\n"); return; } } else data = pkt->data; if (par->codec_id == AV_CODEC_ID_PRORES && size >= 8) { /* Matroska specification requires to remove the first QuickTime atom */ size -= 8; offset = 8; } side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, &side_data_size); if (side_data && side_data_size >= 10) { discard_padding = av_rescale_q(AV_RL32(side_data + 4), (AVRational){1, par->sample_rate}, (AVRational){1, 1000000000}); } side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL, &side_data_size); if (side_data) { additional_id = AV_RB64(side_data); side_data += 8; side_data_size -= 8; } if ((side_data_size && additional_id == 1) || discard_padding) { block_group = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, 0); blockid = MATROSKA_ID_BLOCK; } put_ebml_id(pb, blockid); put_ebml_num(pb, size + 4, 0); // this assumes stream_index is less than 126 avio_w8(pb, 0x80 | track_number); avio_wb16(pb, ts - mkv->cluster_pts); avio_w8(pb, (blockid == MATROSKA_ID_SIMPLEBLOCK && keyframe) ? (1 << 7) : 0); avio_write(pb, data + offset, size); if (data != pkt->data) av_free(data); if (blockid == MATROSKA_ID_BLOCK && !keyframe) { put_ebml_sint(pb, MATROSKA_ID_BLOCKREFERENCE, mkv->last_track_timestamp[track_number - 1]); } mkv->last_track_timestamp[track_number - 1] = ts - mkv->cluster_pts; if (discard_padding) { put_ebml_sint(pb, MATROSKA_ID_DISCARDPADDING, discard_padding); } if (side_data_size && additional_id == 1) { block_additions = start_ebml_master(pb, MATROSKA_ID_BLOCKADDITIONS, 0); block_more = start_ebml_master(pb, MATROSKA_ID_BLOCKMORE, 0); put_ebml_uint(pb, MATROSKA_ID_BLOCKADDID, 1); put_ebml_id(pb, MATROSKA_ID_BLOCKADDITIONAL); put_ebml_num(pb, side_data_size, 0); avio_write(pb, side_data, side_data_size); end_ebml_master(pb, block_more); end_ebml_master(pb, block_additions); } if ((side_data_size && additional_id == 1) || discard_padding) { end_ebml_master(pb, block_group); } } static int mkv_write_vtt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt) { MatroskaMuxContext *mkv = s->priv_data; ebml_master blockgroup; int id_size, settings_size, size; uint8_t *id, *settings; int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts; const int flags = 0; id_size = 0; id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER, &id_size); settings_size = 0; settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS, &settings_size); size = id_size + 1 + settings_size + 1 + pkt->size; av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, " "pts %" PRId64 ", dts %" PRId64 ", duration %" PRId64 ", flags %d\n", avio_tell(pb), size, pkt->pts, pkt->dts, pkt->duration, flags); blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size)); put_ebml_id(pb, MATROSKA_ID_BLOCK); put_ebml_num(pb, size + 4, 0); avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126 avio_wb16(pb, ts - mkv->cluster_pts); avio_w8(pb, flags); avio_printf(pb, "%.*s\n%.*s\n%.*s", id_size, id, settings_size, settings, pkt->size, pkt->data); put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, pkt->duration); end_ebml_master(pb, blockgroup); return pkt->duration; } static void mkv_start_new_cluster(AVFormatContext *s, AVPacket *pkt) { MatroskaMuxContext *mkv = s->priv_data; end_ebml_master_crc32(s->pb, &mkv->dyn_bc, mkv, mkv->cluster); mkv->cluster_pos = -1; if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) av_log(s, AV_LOG_DEBUG, "Starting new cluster at offset %" PRIu64 " bytes, " "pts %" PRIu64 "dts %" PRIu64 "\n", avio_tell(s->pb), pkt->pts, pkt->dts); else av_log(s, AV_LOG_DEBUG, "Starting new cluster, " "pts %" PRIu64 "dts %" PRIu64 "\n", pkt->pts, pkt->dts); avio_flush(s->pb); } static int mkv_check_new_extra_data(AVFormatContext *s, AVPacket *pkt) { MatroskaMuxContext *mkv = s->priv_data; mkv_track *track = &mkv->tracks[pkt->stream_index]; AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar; uint8_t *side_data; int side_data_size = 0, ret; side_data = av_packet_get_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, &side_data_size); switch (par->codec_id) { case AV_CODEC_ID_AAC: if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) { int filler, output_sample_rate = 0; int64_t curpos; ret = get_aac_sample_rates(s, side_data, side_data_size, &track->sample_rate, &output_sample_rate); if (ret < 0) return ret; if (!output_sample_rate) output_sample_rate = track->sample_rate; // Space is already reserved, so it's this or a void element. av_freep(&par->extradata); ret = ff_alloc_extradata(par, side_data_size); if (ret < 0) return ret; memcpy(par->extradata, side_data, side_data_size); curpos = avio_tell(mkv->tracks_bc); avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET); mkv_write_codecprivate(s, mkv->tracks_bc, par, 1, 0); filler = MAX_PCE_SIZE + 2 + 4 - (avio_tell(mkv->tracks_bc) - track->codecpriv_offset); if (filler) put_ebml_void(mkv->tracks_bc, filler); avio_seek(mkv->tracks_bc, track->sample_rate_offset, SEEK_SET); put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOSAMPLINGFREQ, track->sample_rate); put_ebml_float(mkv->tracks_bc, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate); avio_seek(mkv->tracks_bc, curpos, SEEK_SET); } else if (!par->extradata_size && !track->sample_rate) { // No extradata (codecpar or packet side data). av_log(s, AV_LOG_ERROR, "Error parsing AAC extradata, unable to determine samplerate.\n"); return AVERROR(EINVAL); } break; case AV_CODEC_ID_FLAC: if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) { AVCodecParameters *codecpriv_par; int64_t curpos; if (side_data_size != par->extradata_size) { av_log(s, AV_LOG_ERROR, "Invalid FLAC STREAMINFO metadata for output stream %d\n", pkt->stream_index); return AVERROR(EINVAL); } codecpriv_par = avcodec_parameters_alloc(); if (!codecpriv_par) return AVERROR(ENOMEM); ret = avcodec_parameters_copy(codecpriv_par, par); if (ret < 0) { avcodec_parameters_free(&codecpriv_par); return ret; } memcpy(codecpriv_par->extradata, side_data, side_data_size); curpos = avio_tell(mkv->tracks_bc); avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET); mkv_write_codecprivate(s, mkv->tracks_bc, codecpriv_par, 1, 0); avio_seek(mkv->tracks_bc, curpos, SEEK_SET); avcodec_parameters_free(&codecpriv_par); } break; // FIXME: Remove the following once libaom starts propagating extradata during init() // See https://bugs.chromium.org/p/aomedia/issues/detail?id=2012 case AV_CODEC_ID_AV1: if (side_data_size && (s->pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live && !par->extradata_size) { AVIOContext *dyn_cp; uint8_t *codecpriv; int codecpriv_size; int64_t curpos; ret = avio_open_dyn_buf(&dyn_cp); if (ret < 0) return ret; ff_isom_write_av1c(dyn_cp, side_data, side_data_size); codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv); if (!codecpriv_size) { av_free(codecpriv); return AVERROR_INVALIDDATA; } curpos = avio_tell(mkv->tracks_bc); avio_seek(mkv->tracks_bc, track->codecpriv_offset, SEEK_SET); // Do not write the OBUs as we don't have space saved for them put_ebml_binary(mkv->tracks_bc, MATROSKA_ID_CODECPRIVATE, codecpriv, 4); av_free(codecpriv); avio_seek(mkv->tracks_bc, curpos, SEEK_SET); ret = ff_alloc_extradata(par, side_data_size); if (ret < 0) return ret; memcpy(par->extradata, side_data, side_data_size); } else if (!par->extradata_size) return AVERROR_INVALIDDATA; break; default: if (side_data_size) av_log(s, AV_LOG_DEBUG, "Ignoring new extradata in a packet for stream %d.\n", pkt->stream_index); break; } return 0; } static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue) { MatroskaMuxContext *mkv = s->priv_data; AVIOContext *pb = s->pb; AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar; int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY); int duration = pkt->duration; int ret; int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts; int64_t relative_packet_pos; int dash_tracknum = mkv->is_dash ? mkv->dash_track_number : pkt->stream_index + 1; if (ts == AV_NOPTS_VALUE) { av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n"); return AVERROR(EINVAL); } ts += mkv->tracks[pkt->stream_index].ts_offset; if (mkv->cluster_pos != -1) { int64_t cluster_time = ts - mkv->cluster_pts; if ((int16_t)cluster_time != cluster_time) { av_log(s, AV_LOG_WARNING, "Starting new cluster due to timestamp\n"); mkv_start_new_cluster(s, pkt); } } if (mkv->cluster_pos == -1) { mkv->cluster_pos = avio_tell(s->pb); ret = start_ebml_master_crc32(s->pb, &mkv->dyn_bc, mkv, &mkv->cluster, MATROSKA_ID_CLUSTER, 0); if (ret < 0) return ret; put_ebml_uint(mkv->dyn_bc, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts)); mkv->cluster_pts = FFMAX(0, ts); } pb = mkv->dyn_bc; relative_packet_pos = avio_tell(pb); if (par->codec_type != AVMEDIA_TYPE_SUBTITLE) { mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe); if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) { ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, -1); if (ret < 0) return ret; } } else { if (par->codec_id == AV_CODEC_ID_WEBVTT) { duration = mkv_write_vtt_blocks(s, pb, pkt); } else { ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(pkt->size)); #if FF_API_CONVERGENCE_DURATION FF_DISABLE_DEPRECATION_WARNINGS /* For backward compatibility, prefer convergence_duration. */ if (pkt->convergence_duration > 0) { duration = pkt->convergence_duration; } FF_ENABLE_DEPRECATION_WARNINGS #endif /* All subtitle blocks are considered to be keyframes. */ mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 1); put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration); end_ebml_master(pb, blockgroup); } if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) { ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, dash_tracknum, ts, mkv->cluster_pos, relative_packet_pos, duration); if (ret < 0) return ret; } } mkv->duration = FFMAX(mkv->duration, ts + duration); if (mkv->stream_durations) mkv->stream_durations[pkt->stream_index] = FFMAX(mkv->stream_durations[pkt->stream_index], ts + duration); return 0; } static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt) { MatroskaMuxContext *mkv = s->priv_data; int codec_type = s->streams[pkt->stream_index]->codecpar->codec_type; int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY); int cluster_size; int64_t cluster_time; int ret; int start_new_cluster; ret = mkv_check_new_extra_data(s, pkt); if (ret < 0) return ret; if (mkv->tracks[pkt->stream_index].write_dts) cluster_time = pkt->dts - mkv->cluster_pts; else cluster_time = pkt->pts - mkv->cluster_pts; cluster_time += mkv->tracks[pkt->stream_index].ts_offset; // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or // after 4k and on a keyframe cluster_size = avio_tell(mkv->dyn_bc); if (mkv->is_dash && codec_type == AVMEDIA_TYPE_VIDEO) { // WebM DASH specification states that the first block of every cluster // has to be a key frame. So for DASH video, we only create a cluster // on seeing key frames. start_new_cluster = keyframe; } else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO && (mkv->cluster_pos == -1 || cluster_time > mkv->cluster_time_limit)) { // For DASH audio, we create a Cluster based on cluster_time_limit start_new_cluster = 1; } else if (!mkv->is_dash && (cluster_size > mkv->cluster_size_limit || cluster_time > mkv->cluster_time_limit || (codec_type == AVMEDIA_TYPE_VIDEO && keyframe && cluster_size > 4 * 1024))) { start_new_cluster = 1; } else { start_new_cluster = 0; } if (mkv->cluster_pos != -1 && start_new_cluster) { mkv_start_new_cluster(s, pkt); } if (!mkv->cluster_pos) avio_write_marker(s->pb, av_rescale_q(pkt->dts, s->streams[pkt->stream_index]->time_base, AV_TIME_BASE_Q), keyframe && (mkv->have_video ? codec_type == AVMEDIA_TYPE_VIDEO : 1) ? AVIO_DATA_MARKER_SYNC_POINT : AVIO_DATA_MARKER_BOUNDARY_POINT); // check if we have an audio packet cached if (mkv->cur_audio_pkt.size > 0) { // for DASH audio, a CuePoint has to be added when there is a new cluster. ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, mkv->is_dash ? start_new_cluster : 0); av_packet_unref(&mkv->cur_audio_pkt); if (ret < 0) { av_log(s, AV_LOG_ERROR, "Could not write cached audio packet ret:%d\n", ret); return ret; } } // buffer an audio packet to ensure the packet containing the video // keyframe's timecode is contained in the same cluster for WebM if (codec_type == AVMEDIA_TYPE_AUDIO) { if (pkt->size > 0) ret = av_packet_ref(&mkv->cur_audio_pkt, pkt); } else ret = mkv_write_packet_internal(s, pkt, 0); return ret; } static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt) { MatroskaMuxContext *mkv = s->priv_data; if (!pkt) { if (mkv->cluster_pos != -1) { end_ebml_master_crc32(s->pb, &mkv->dyn_bc, mkv, mkv->cluster); mkv->cluster_pos = -1; if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) av_log(s, AV_LOG_DEBUG, "Flushing cluster at offset %" PRIu64 " bytes\n", avio_tell(s->pb)); else av_log(s, AV_LOG_DEBUG, "Flushing cluster\n"); avio_flush(s->pb); } return 1; } return mkv_write_packet(s, pkt); } static int mkv_write_trailer(AVFormatContext *s) { MatroskaMuxContext *mkv = s->priv_data; AVIOContext *pb = s->pb; int64_t currentpos, cuespos; int ret; // check if we have an audio packet cached if (mkv->cur_audio_pkt.size > 0) { ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0); av_packet_unref(&mkv->cur_audio_pkt); if (ret < 0) { av_log(s, AV_LOG_ERROR, "Could not write cached audio packet ret:%d\n", ret); return ret; } } if (mkv->dyn_bc) { end_ebml_master_crc32(pb, &mkv->dyn_bc, mkv, mkv->cluster); } ret = mkv_write_chapters(s); if (ret < 0) return ret; if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !mkv->is_live) { if (mkv->cues->num_entries) { if (mkv->reserve_cues_space) { int64_t cues_end; currentpos = avio_tell(pb); avio_seek(pb, mkv->cues_pos, SEEK_SET); cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams); cues_end = avio_tell(pb); if (cues_end > cuespos + mkv->reserve_cues_space) { av_log(s, AV_LOG_ERROR, "Insufficient space reserved for cues: %d " "(needed: %" PRId64 ").\n", mkv->reserve_cues_space, cues_end - cuespos); return AVERROR(EINVAL); } if (cues_end < cuespos + mkv->reserve_cues_space) put_ebml_void(pb, mkv->reserve_cues_space - (cues_end - cuespos)); avio_seek(pb, currentpos, SEEK_SET); } else { cuespos = mkv_write_cues(s, mkv->cues, mkv->tracks, s->nb_streams); } ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES, cuespos); if (ret < 0) return ret; } mkv_write_seekhead(pb, mkv); // update the duration av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration); currentpos = avio_tell(pb); avio_seek(mkv->info_bc, mkv->duration_offset, SEEK_SET); put_ebml_float(mkv->info_bc, MATROSKA_ID_DURATION, mkv->duration); avio_seek(pb, mkv->info.pos, SEEK_SET); end_ebml_master_crc32(pb, &mkv->info_bc, mkv, mkv->info); // write tracks master avio_seek(pb, mkv->tracks_master.pos, SEEK_SET); end_ebml_master_crc32(pb, &mkv->tracks_bc, mkv, mkv->tracks_master); // update stream durations if (!mkv->is_live && mkv->stream_durations) { int i; int64_t curr = avio_tell(mkv->tags_bc); for (i = 0; i < s->nb_streams; ++i) { AVStream *st = s->streams[i]; if (mkv->stream_duration_offsets[i] > 0) { double duration_sec = mkv->stream_durations[i] * av_q2d(st->time_base); char duration_string[20] = ""; av_log(s, AV_LOG_DEBUG, "stream %d end duration = %" PRIu64 "\n", i, mkv->stream_durations[i]); avio_seek(mkv->tags_bc, mkv->stream_duration_offsets[i], SEEK_SET); snprintf(duration_string, 20, "%02d:%02d:%012.9f", (int) duration_sec / 3600, ((int) duration_sec / 60) % 60, fmod(duration_sec, 60)); put_ebml_binary(mkv->tags_bc, MATROSKA_ID_TAGSTRING, duration_string, 20); } } avio_seek(mkv->tags_bc, curr, SEEK_SET); } if (mkv->tags.pos && !mkv->is_live) { avio_seek(pb, mkv->tags.pos, SEEK_SET); end_ebml_master_crc32(pb, &mkv->tags_bc, mkv, mkv->tags); } avio_seek(pb, currentpos, SEEK_SET); } if (!mkv->is_live) { end_ebml_master(pb, mkv->segment); } mkv_free(mkv); return 0; } static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance) { int i; for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++) if (ff_mkv_codec_tags[i].id == codec_id) return 1; if (std_compliance < FF_COMPLIANCE_NORMAL) { enum AVMediaType type = avcodec_get_type(codec_id); // mkv theoretically supports any video/audio through VFW/ACM if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO) return 1; } return 0; } static int webm_query_codec(enum AVCodecID codec_id, int std_compliance) { int i; for (i = 0; ff_webm_codec_tags[i].id != AV_CODEC_ID_NONE; i++) if (ff_webm_codec_tags[i].id == codec_id) return 1; return 0; } static int mkv_init(struct AVFormatContext *s) { int i; if (s->nb_streams > MAX_TRACKS) { av_log(s, AV_LOG_ERROR, "At most %d streams are supported for muxing in Matroska\n", MAX_TRACKS); return AVERROR(EINVAL); } for (i = 0; i < s->nb_streams; i++) { if (s->streams[i]->codecpar->codec_id == AV_CODEC_ID_ATRAC3 || s->streams[i]->codecpar->codec_id == AV_CODEC_ID_COOK || s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RA_288 || s->streams[i]->codecpar->codec_id == AV_CODEC_ID_SIPR || s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV10 || s->streams[i]->codecpar->codec_id == AV_CODEC_ID_RV20) { av_log(s, AV_LOG_ERROR, "The Matroska muxer does not yet support muxing %s\n", avcodec_get_name(s->streams[i]->codecpar->codec_id)); return AVERROR_PATCHWELCOME; } } if (s->avoid_negative_ts < 0) { s->avoid_negative_ts = 1; s->internal->avoid_negative_ts_use_pts = 1; } for (i = 0; i < s->nb_streams; i++) { // ms precision is the de-facto standard timescale for mkv files avpriv_set_pts_info(s->streams[i], 64, 1, 1000); } return 0; } static int mkv_check_bitstream(struct AVFormatContext *s, const AVPacket *pkt) { int ret = 1; AVStream *st = s->streams[pkt->stream_index]; if (st->codecpar->codec_id == AV_CODEC_ID_AAC) { if (pkt->size > 2 && (AV_RB16(pkt->data) & 0xfff0) == 0xfff0) ret = ff_stream_add_bitstream_filter(st, "aac_adtstoasc", NULL); } else if (st->codecpar->codec_id == AV_CODEC_ID_VP9) { ret = ff_stream_add_bitstream_filter(st, "vp9_superframe", NULL); } return ret; } static const AVCodecTag additional_audio_tags[] = { { AV_CODEC_ID_ALAC, 0XFFFFFFFF }, { AV_CODEC_ID_MLP, 0xFFFFFFFF }, { AV_CODEC_ID_OPUS, 0xFFFFFFFF }, { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF }, { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF }, { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF }, { AV_CODEC_ID_QDMC, 0xFFFFFFFF }, { AV_CODEC_ID_QDM2, 0xFFFFFFFF }, { AV_CODEC_ID_RA_144, 0xFFFFFFFF }, { AV_CODEC_ID_RA_288, 0xFFFFFFFF }, { AV_CODEC_ID_COOK, 0xFFFFFFFF }, { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF }, { AV_CODEC_ID_NONE, 0xFFFFFFFF } }; static const AVCodecTag additional_video_tags[] = { { AV_CODEC_ID_RV10, 0xFFFFFFFF }, { AV_CODEC_ID_RV20, 0xFFFFFFFF }, { AV_CODEC_ID_RV30, 0xFFFFFFFF }, { AV_CODEC_ID_NONE, 0xFFFFFFFF } }; static const AVCodecTag additional_subtitle_tags[] = { { AV_CODEC_ID_DVB_SUBTITLE, 0xFFFFFFFF }, { AV_CODEC_ID_DVD_SUBTITLE, 0xFFFFFFFF }, { AV_CODEC_ID_HDMV_PGS_SUBTITLE, 0xFFFFFFFF }, { AV_CODEC_ID_NONE, 0xFFFFFFFF } }; #define OFFSET(x) offsetof(MatroskaMuxContext, x) #define FLAGS AV_OPT_FLAG_ENCODING_PARAM static const AVOption options[] = { { "reserve_index_space", "Reserve a given amount of space (in bytes) at the beginning of the file for the index (cues).", OFFSET(reserve_cues_space), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS }, { "cluster_size_limit", "Store at most the provided amount of bytes in a cluster. ", OFFSET(cluster_size_limit), AV_OPT_TYPE_INT , { .i64 = -1 }, -1, INT_MAX, FLAGS }, { "cluster_time_limit", "Store at most the provided number of milliseconds in a cluster.", OFFSET(cluster_time_limit), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, FLAGS }, { "dash", "Create a WebM file conforming to WebM DASH specification", OFFSET(is_dash), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS }, { "dash_track_number", "Track number for the DASH stream", OFFSET(dash_track_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 127, FLAGS }, { "live", "Write files assuming it is a live stream.", OFFSET(is_live), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS }, { "allow_raw_vfw", "allow RAW VFW mode", OFFSET(allow_raw_vfw), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS }, { "write_crc32", "write a CRC32 element inside every Level 1 element", OFFSET(write_crc), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS }, { NULL }, }; #if CONFIG_MATROSKA_MUXER static const AVClass matroska_class = { .class_name = "matroska muxer", .item_name = av_default_item_name, .option = options, .version = LIBAVUTIL_VERSION_INT, }; AVOutputFormat ff_matroska_muxer = { .name = "matroska", .long_name = NULL_IF_CONFIG_SMALL("Matroska"), .mime_type = "video/x-matroska", .extensions = "mkv", .priv_data_size = sizeof(MatroskaMuxContext), .audio_codec = CONFIG_LIBVORBIS_ENCODER ? AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3, .video_codec = CONFIG_LIBX264_ENCODER ? AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4, .init = mkv_init, .write_header = mkv_write_header, .write_packet = mkv_write_flush_packet, .write_trailer = mkv_write_trailer, .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH, .codec_tag = (const AVCodecTag* const []){ ff_codec_bmp_tags, ff_codec_wav_tags, additional_audio_tags, additional_video_tags, additional_subtitle_tags, 0 }, .subtitle_codec = AV_CODEC_ID_ASS, .query_codec = mkv_query_codec, .check_bitstream = mkv_check_bitstream, .priv_class = &matroska_class, }; #endif #if CONFIG_WEBM_MUXER static const AVClass webm_class = { .class_name = "webm muxer", .item_name = av_default_item_name, .option = options, .version = LIBAVUTIL_VERSION_INT, }; AVOutputFormat ff_webm_muxer = { .name = "webm", .long_name = NULL_IF_CONFIG_SMALL("WebM"), .mime_type = "video/webm", .extensions = "webm", .priv_data_size = sizeof(MatroskaMuxContext), .audio_codec = CONFIG_LIBOPUS_ENCODER ? AV_CODEC_ID_OPUS : AV_CODEC_ID_VORBIS, .video_codec = CONFIG_LIBVPX_VP9_ENCODER? AV_CODEC_ID_VP9 : AV_CODEC_ID_VP8, .subtitle_codec = AV_CODEC_ID_WEBVTT, .init = mkv_init, .write_header = mkv_write_header, .write_packet = mkv_write_flush_packet, .write_trailer = mkv_write_trailer, .query_codec = webm_query_codec, .check_bitstream = mkv_check_bitstream, .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH, .priv_class = &webm_class, }; #endif #if CONFIG_MATROSKA_AUDIO_MUXER static const AVClass mka_class = { .class_name = "matroska audio muxer", .item_name = av_default_item_name, .option = options, .version = LIBAVUTIL_VERSION_INT, }; AVOutputFormat ff_matroska_audio_muxer = { .name = "matroska", .long_name = NULL_IF_CONFIG_SMALL("Matroska Audio"), .mime_type = "audio/x-matroska", .extensions = "mka", .priv_data_size = sizeof(MatroskaMuxContext), .audio_codec = CONFIG_LIBVORBIS_ENCODER ? AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3, .video_codec = AV_CODEC_ID_NONE, .init = mkv_init, .write_header = mkv_write_header, .write_packet = mkv_write_flush_packet, .write_trailer = mkv_write_trailer, .check_bitstream = mkv_check_bitstream, .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT | AVFMT_ALLOW_FLUSH, .codec_tag = (const AVCodecTag* const []){ ff_codec_wav_tags, additional_audio_tags, 0 }, .priv_class = &mka_class, }; #endif