yading@11: /* yading@11: * Matroska muxer yading@11: * Copyright (c) 2007 David Conrad yading@11: * yading@11: * This file is part of FFmpeg. yading@11: * yading@11: * FFmpeg is free software; you can redistribute it and/or yading@11: * modify it under the terms of the GNU Lesser General Public yading@11: * License as published by the Free Software Foundation; either yading@11: * version 2.1 of the License, or (at your option) any later version. yading@11: * yading@11: * FFmpeg is distributed in the hope that it will be useful, yading@11: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@11: * Lesser General Public License for more details. yading@11: * yading@11: * You should have received a copy of the GNU Lesser General Public yading@11: * License along with FFmpeg; if not, write to the Free Software yading@11: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@11: */ yading@11: yading@11: #include "avformat.h" yading@11: #include "internal.h" yading@11: #include "riff.h" yading@11: #include "isom.h" yading@11: #include "matroska.h" yading@11: #include "avc.h" yading@11: #include "flacenc.h" yading@11: #include "avlanguage.h" yading@11: #include "libavutil/samplefmt.h" yading@11: #include "libavutil/sha.h" yading@11: #include "libavutil/intreadwrite.h" yading@11: #include "libavutil/intfloat.h" yading@11: #include "libavutil/mathematics.h" yading@11: #include "libavutil/random_seed.h" yading@11: #include "libavutil/lfg.h" yading@11: #include "libavutil/dict.h" yading@11: #include "libavutil/avstring.h" yading@11: #include "libavcodec/xiph.h" yading@11: #include "libavcodec/mpeg4audio.h" yading@11: yading@11: typedef struct ebml_master { yading@11: int64_t pos; ///< absolute offset in the file where the master's elements start yading@11: int sizebytes; ///< how many bytes were reserved for the size yading@11: } ebml_master; yading@11: yading@11: typedef struct mkv_seekhead_entry { yading@11: unsigned int elementid; yading@11: uint64_t segmentpos; yading@11: } mkv_seekhead_entry; yading@11: yading@11: typedef struct mkv_seekhead { yading@11: int64_t filepos; yading@11: int64_t segment_offset; ///< the file offset to the beginning of the segment yading@11: int reserved_size; ///< -1 if appending to file yading@11: int max_entries; yading@11: mkv_seekhead_entry *entries; yading@11: int num_entries; yading@11: } mkv_seekhead; yading@11: yading@11: typedef struct { yading@11: uint64_t pts; yading@11: int tracknum; yading@11: int64_t cluster_pos; ///< file offset of the cluster containing the block yading@11: } mkv_cuepoint; yading@11: yading@11: typedef struct { yading@11: int64_t segment_offset; yading@11: mkv_cuepoint *entries; yading@11: int num_entries; yading@11: } mkv_cues; yading@11: yading@11: typedef struct { yading@11: int write_dts; yading@11: int has_cue; yading@11: } mkv_track; yading@11: yading@11: #define MODE_MATROSKAv2 0x01 yading@11: #define MODE_WEBM 0x02 yading@11: yading@11: typedef struct MatroskaMuxContext { yading@11: int mode; yading@11: AVIOContext *dyn_bc; yading@11: ebml_master segment; yading@11: int64_t segment_offset; yading@11: ebml_master cluster; yading@11: int64_t cluster_pos; ///< file offset of the current cluster yading@11: int64_t cluster_pts; yading@11: int64_t duration_offset; yading@11: int64_t duration; yading@11: mkv_seekhead *main_seekhead; yading@11: mkv_cues *cues; yading@11: mkv_track *tracks; yading@11: yading@11: AVPacket cur_audio_pkt; yading@11: yading@11: int have_attachments; yading@11: } MatroskaMuxContext; yading@11: yading@11: yading@11: /** 2 bytes * 3 for EBML IDs, 3 1-byte EBML lengths, 8 bytes for 64 bit yading@11: * offset, 4 bytes for target EBML ID */ yading@11: #define MAX_SEEKENTRY_SIZE 21 yading@11: yading@11: /** per-cuepoint-track - 3 1-byte EBML IDs, 3 1-byte EBML sizes, 2 yading@11: * 8-byte uint max */ yading@11: #define MAX_CUETRACKPOS_SIZE 22 yading@11: yading@11: /** per-cuepoint - 2 1-byte EBML IDs, 2 1-byte EBML sizes, 8-byte uint max */ yading@11: #define MAX_CUEPOINT_SIZE(num_tracks) 12 + MAX_CUETRACKPOS_SIZE*num_tracks yading@11: yading@11: yading@11: static int ebml_id_size(unsigned int id) yading@11: { yading@11: return (av_log2(id+1)-1)/7+1; yading@11: } yading@11: yading@11: static void put_ebml_id(AVIOContext *pb, unsigned int id) yading@11: { yading@11: int i = ebml_id_size(id); yading@11: while (i--) yading@11: avio_w8(pb, (uint8_t)(id >> (i*8))); yading@11: } yading@11: yading@11: /** yading@11: * Write an EBML size meaning "unknown size". yading@11: * yading@11: * @param bytes The number of bytes the size should occupy (maximum: 8). yading@11: */ yading@11: static void put_ebml_size_unknown(AVIOContext *pb, int bytes) yading@11: { yading@11: av_assert0(bytes <= 8); yading@11: avio_w8(pb, 0x1ff >> bytes); yading@11: while (--bytes) yading@11: avio_w8(pb, 0xff); yading@11: } yading@11: yading@11: /** yading@11: * Calculate how many bytes are needed to represent a given number in EBML. yading@11: */ yading@11: static int ebml_num_size(uint64_t num) yading@11: { yading@11: int bytes = 1; yading@11: while ((num+1) >> bytes*7) bytes++; yading@11: return bytes; yading@11: } yading@11: yading@11: /** yading@11: * Write a number in EBML variable length format. yading@11: * yading@11: * @param bytes The number of bytes that need to be used to write the number. yading@11: * If zero, any number of bytes can be used. yading@11: */ yading@11: static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes) yading@11: { yading@11: int i, needed_bytes = ebml_num_size(num); yading@11: yading@11: // sizes larger than this are currently undefined in EBML yading@11: av_assert0(num < (1ULL<<56)-1); yading@11: yading@11: if (bytes == 0) yading@11: // don't care how many bytes are used, so use the min yading@11: bytes = needed_bytes; yading@11: // the bytes needed to write the given size would exceed the bytes yading@11: // that we need to use, so write unknown size. This shouldn't happen. yading@11: av_assert0(bytes >= needed_bytes); yading@11: yading@11: num |= 1ULL << bytes*7; yading@11: for (i = bytes - 1; i >= 0; i--) yading@11: avio_w8(pb, (uint8_t)(num >> i*8)); yading@11: } yading@11: yading@11: static void put_ebml_uint(AVIOContext *pb, unsigned int elementid, uint64_t val) yading@11: { yading@11: int i, bytes = 1; yading@11: uint64_t tmp = val; yading@11: while (tmp>>=8) bytes++; yading@11: yading@11: put_ebml_id(pb, elementid); yading@11: put_ebml_num(pb, bytes, 0); yading@11: for (i = bytes - 1; i >= 0; i--) yading@11: avio_w8(pb, (uint8_t)(val >> i*8)); yading@11: } yading@11: yading@11: static void put_ebml_float(AVIOContext *pb, unsigned int elementid, double val) yading@11: { yading@11: put_ebml_id(pb, elementid); yading@11: put_ebml_num(pb, 8, 0); yading@11: avio_wb64(pb, av_double2int(val)); yading@11: } yading@11: yading@11: static void put_ebml_binary(AVIOContext *pb, unsigned int elementid, yading@11: const void *buf, int size) yading@11: { yading@11: put_ebml_id(pb, elementid); yading@11: put_ebml_num(pb, size, 0); yading@11: avio_write(pb, buf, size); yading@11: } yading@11: yading@11: static void put_ebml_string(AVIOContext *pb, unsigned int elementid, const char *str) yading@11: { yading@11: put_ebml_binary(pb, elementid, str, strlen(str)); yading@11: } yading@11: yading@11: /** yading@11: * Write a void element of a given size. Useful for reserving space in yading@11: * the file to be written to later. yading@11: * yading@11: * @param size The number of bytes to reserve, which must be at least 2. yading@11: */ yading@11: static void put_ebml_void(AVIOContext *pb, uint64_t size) yading@11: { yading@11: int64_t currentpos = avio_tell(pb); yading@11: yading@11: av_assert0(size >= 2); yading@11: yading@11: put_ebml_id(pb, EBML_ID_VOID); yading@11: // we need to subtract the length needed to store the size from the yading@11: // size we need to reserve so 2 cases, we use 8 bytes to store the yading@11: // size if possible, 1 byte otherwise yading@11: if (size < 10) yading@11: put_ebml_num(pb, size-1, 0); yading@11: else yading@11: put_ebml_num(pb, size-9, 8); yading@11: while(avio_tell(pb) < currentpos + size) yading@11: avio_w8(pb, 0); yading@11: } yading@11: yading@11: static ebml_master start_ebml_master(AVIOContext *pb, unsigned int elementid, uint64_t expectedsize) yading@11: { yading@11: int bytes = expectedsize ? ebml_num_size(expectedsize) : 8; yading@11: put_ebml_id(pb, elementid); yading@11: put_ebml_size_unknown(pb, bytes); yading@11: return (ebml_master){ avio_tell(pb), bytes }; yading@11: } yading@11: yading@11: static void end_ebml_master(AVIOContext *pb, ebml_master master) yading@11: { yading@11: int64_t pos = avio_tell(pb); yading@11: yading@11: if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0) yading@11: return; yading@11: put_ebml_num(pb, pos - master.pos, master.sizebytes); yading@11: avio_seek(pb, pos, SEEK_SET); yading@11: } yading@11: yading@11: static void put_xiph_size(AVIOContext *pb, int size) yading@11: { yading@11: int i; yading@11: for (i = 0; i < size / 255; i++) yading@11: avio_w8(pb, 255); yading@11: avio_w8(pb, size % 255); yading@11: } yading@11: yading@11: /** yading@11: * Initialize a mkv_seekhead element to be ready to index level 1 Matroska yading@11: * elements. If a maximum number of elements is specified, enough space yading@11: * will be reserved at the current file location to write a seek head of yading@11: * that size. yading@11: * yading@11: * @param segment_offset The absolute offset to the position in the file yading@11: * where the segment begins. yading@11: * @param numelements The maximum number of elements that will be indexed yading@11: * by this seek head, 0 if unlimited. yading@11: */ yading@11: static mkv_seekhead * mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset, int numelements) yading@11: { yading@11: mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead)); yading@11: if (new_seekhead == NULL) yading@11: return NULL; yading@11: yading@11: new_seekhead->segment_offset = segment_offset; yading@11: yading@11: if (numelements > 0) { yading@11: new_seekhead->filepos = avio_tell(pb); yading@11: // 21 bytes max for a seek entry, 10 bytes max for the SeekHead ID yading@11: // and size, and 3 bytes to guarantee that an EBML void element yading@11: // will fit afterwards yading@11: new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 13; yading@11: new_seekhead->max_entries = numelements; yading@11: put_ebml_void(pb, new_seekhead->reserved_size); yading@11: } yading@11: return new_seekhead; yading@11: } yading@11: yading@11: static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, unsigned int elementid, uint64_t filepos) yading@11: { yading@11: mkv_seekhead_entry *entries = seekhead->entries; yading@11: yading@11: // don't store more elements than we reserved space for yading@11: if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries) yading@11: return -1; yading@11: yading@11: entries = av_realloc(entries, (seekhead->num_entries + 1) * sizeof(mkv_seekhead_entry)); yading@11: if (entries == NULL) yading@11: return AVERROR(ENOMEM); yading@11: yading@11: entries[seekhead->num_entries ].elementid = elementid; yading@11: entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset; yading@11: yading@11: seekhead->entries = entries; yading@11: return 0; yading@11: } yading@11: yading@11: /** yading@11: * Write the seek head to the file and free it. If a maximum number of yading@11: * elements was specified to mkv_start_seekhead(), the seek head will yading@11: * be written at the location reserved for it. Otherwise, it is written yading@11: * at the current location in the file. yading@11: * yading@11: * @return The file offset where the seekhead was written, yading@11: * -1 if an error occurred. yading@11: */ yading@11: static int64_t mkv_write_seekhead(AVIOContext *pb, mkv_seekhead *seekhead) yading@11: { yading@11: ebml_master metaseek, seekentry; yading@11: int64_t currentpos; yading@11: int i; yading@11: yading@11: currentpos = avio_tell(pb); yading@11: yading@11: if (seekhead->reserved_size > 0) { yading@11: if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) { yading@11: currentpos = -1; yading@11: goto fail; yading@11: } yading@11: } yading@11: yading@11: metaseek = start_ebml_master(pb, MATROSKA_ID_SEEKHEAD, seekhead->reserved_size); yading@11: for (i = 0; i < seekhead->num_entries; i++) { yading@11: mkv_seekhead_entry *entry = &seekhead->entries[i]; yading@11: yading@11: seekentry = start_ebml_master(pb, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE); yading@11: yading@11: put_ebml_id(pb, MATROSKA_ID_SEEKID); yading@11: put_ebml_num(pb, ebml_id_size(entry->elementid), 0); yading@11: put_ebml_id(pb, entry->elementid); yading@11: yading@11: put_ebml_uint(pb, MATROSKA_ID_SEEKPOSITION, entry->segmentpos); yading@11: end_ebml_master(pb, seekentry); yading@11: } yading@11: end_ebml_master(pb, metaseek); yading@11: yading@11: if (seekhead->reserved_size > 0) { yading@11: uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb); yading@11: put_ebml_void(pb, remaining); yading@11: avio_seek(pb, currentpos, SEEK_SET); yading@11: yading@11: currentpos = seekhead->filepos; yading@11: } yading@11: fail: yading@11: av_free(seekhead->entries); yading@11: av_free(seekhead); yading@11: yading@11: return currentpos; yading@11: } yading@11: yading@11: static mkv_cues * mkv_start_cues(int64_t segment_offset) yading@11: { yading@11: mkv_cues *cues = av_mallocz(sizeof(mkv_cues)); yading@11: if (cues == NULL) yading@11: return NULL; yading@11: yading@11: cues->segment_offset = segment_offset; yading@11: return cues; yading@11: } yading@11: yading@11: static int mkv_add_cuepoint(mkv_cues *cues, int stream, int64_t ts, int64_t cluster_pos) yading@11: { yading@11: mkv_cuepoint *entries = cues->entries; yading@11: yading@11: if (ts < 0) yading@11: return 0; yading@11: yading@11: entries = av_realloc(entries, (cues->num_entries + 1) * sizeof(mkv_cuepoint)); yading@11: if (entries == NULL) yading@11: return AVERROR(ENOMEM); yading@11: yading@11: entries[cues->num_entries ].pts = ts; yading@11: entries[cues->num_entries ].tracknum = stream + 1; yading@11: entries[cues->num_entries++].cluster_pos = cluster_pos - cues->segment_offset; yading@11: yading@11: cues->entries = entries; yading@11: return 0; yading@11: } yading@11: yading@11: static int64_t mkv_write_cues(AVIOContext *pb, mkv_cues *cues, mkv_track *tracks, int num_tracks) yading@11: { yading@11: ebml_master cues_element; yading@11: int64_t currentpos; yading@11: int i, j; yading@11: yading@11: currentpos = avio_tell(pb); yading@11: cues_element = start_ebml_master(pb, MATROSKA_ID_CUES, 0); yading@11: yading@11: for (i = 0; i < cues->num_entries; i++) { yading@11: ebml_master cuepoint, track_positions; yading@11: mkv_cuepoint *entry = &cues->entries[i]; yading@11: uint64_t pts = entry->pts; yading@11: yading@11: cuepoint = start_ebml_master(pb, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(num_tracks)); yading@11: put_ebml_uint(pb, MATROSKA_ID_CUETIME, pts); yading@11: yading@11: // put all the entries from different tracks that have the exact same yading@11: // timestamp into the same CuePoint yading@11: for (j = 0; j < num_tracks; j++) yading@11: tracks[j].has_cue = 0; yading@11: for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) { yading@11: int tracknum = entry[j].tracknum - 1; yading@11: av_assert0(tracknum>=0 && tracknumcodec_id == AV_CODEC_ID_VORBIS) yading@11: first_header_size = 30; yading@11: else yading@11: first_header_size = 42; yading@11: yading@11: if (avpriv_split_xiph_headers(codec->extradata, codec->extradata_size, yading@11: first_header_size, header_start, header_len) < 0) { yading@11: av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n"); yading@11: return -1; yading@11: } yading@11: yading@11: avio_w8(pb, 2); // number packets - 1 yading@11: for (j = 0; j < 2; j++) { yading@11: put_xiph_size(pb, header_len[j]); yading@11: } yading@11: for (j = 0; j < 3; j++) yading@11: avio_write(pb, header_start[j], header_len[j]); yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static void get_aac_sample_rates(AVFormatContext *s, AVCodecContext *codec, int *sample_rate, int *output_sample_rate) yading@11: { yading@11: MPEG4AudioConfig mp4ac; yading@11: yading@11: if (avpriv_mpeg4audio_get_config(&mp4ac, codec->extradata, yading@11: codec->extradata_size * 8, 1) < 0) { yading@11: av_log(s, AV_LOG_WARNING, "Error parsing AAC extradata, unable to determine samplerate.\n"); yading@11: return; yading@11: } yading@11: yading@11: *sample_rate = mp4ac.sample_rate; yading@11: *output_sample_rate = mp4ac.ext_sample_rate; yading@11: } yading@11: yading@11: static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec, int native_id, int qt_id) yading@11: { yading@11: AVIOContext *dyn_cp; yading@11: uint8_t *codecpriv; yading@11: int ret, codecpriv_size; yading@11: yading@11: ret = avio_open_dyn_buf(&dyn_cp); yading@11: if(ret < 0) yading@11: return ret; yading@11: yading@11: if (native_id) { yading@11: if (codec->codec_id == AV_CODEC_ID_VORBIS || codec->codec_id == AV_CODEC_ID_THEORA) yading@11: ret = put_xiph_codecpriv(s, dyn_cp, codec); yading@11: else if (codec->codec_id == AV_CODEC_ID_FLAC) yading@11: ret = ff_flac_write_header(dyn_cp, codec, 1); yading@11: else if (codec->codec_id == AV_CODEC_ID_H264) yading@11: ret = ff_isom_write_avcc(dyn_cp, codec->extradata, codec->extradata_size); yading@11: else if (codec->codec_id == AV_CODEC_ID_ALAC) { yading@11: if (codec->extradata_size < 36) { yading@11: av_log(s, AV_LOG_ERROR, yading@11: "Invalid extradata found, ALAC expects a 36-byte " yading@11: "QuickTime atom."); yading@11: ret = AVERROR_INVALIDDATA; yading@11: } else yading@11: avio_write(dyn_cp, codec->extradata + 12, yading@11: codec->extradata_size - 12); yading@11: } yading@11: else if (codec->extradata_size && codec->codec_id != AV_CODEC_ID_TTA) yading@11: avio_write(dyn_cp, codec->extradata, codec->extradata_size); yading@11: } else if (codec->codec_type == AVMEDIA_TYPE_VIDEO) { yading@11: if (qt_id) { yading@11: if (!codec->codec_tag) yading@11: codec->codec_tag = ff_codec_get_tag(ff_codec_movvideo_tags, codec->codec_id); yading@11: if (codec->extradata_size) yading@11: avio_write(dyn_cp, codec->extradata, codec->extradata_size); yading@11: } else { yading@11: if (!codec->codec_tag) yading@11: codec->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id); yading@11: if (!codec->codec_tag) { yading@11: av_log(s, AV_LOG_ERROR, "No bmp codec tag found for codec %s\n", yading@11: avcodec_get_name(codec->codec_id)); yading@11: ret = AVERROR(EINVAL); yading@11: } yading@11: yading@11: ff_put_bmp_header(dyn_cp, codec, ff_codec_bmp_tags, 0); yading@11: } yading@11: yading@11: } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) { yading@11: unsigned int tag; yading@11: tag = ff_codec_get_tag(ff_codec_wav_tags, codec->codec_id); yading@11: if (!tag) { yading@11: av_log(s, AV_LOG_ERROR, "No wav codec tag found for codec %s\n", yading@11: avcodec_get_name(codec->codec_id)); yading@11: ret = AVERROR(EINVAL); yading@11: } yading@11: if (!codec->codec_tag) yading@11: codec->codec_tag = tag; yading@11: yading@11: ff_put_wav_header(dyn_cp, codec); yading@11: } yading@11: yading@11: codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv); yading@11: if (codecpriv_size) yading@11: put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv, codecpriv_size); yading@11: av_free(codecpriv); yading@11: return ret; yading@11: } yading@11: yading@11: static int mkv_write_tracks(AVFormatContext *s) yading@11: { yading@11: MatroskaMuxContext *mkv = s->priv_data; yading@11: AVIOContext *pb = s->pb; yading@11: ebml_master tracks; yading@11: int i, j, ret, default_stream_exists = 0; yading@11: yading@11: ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb)); yading@11: if (ret < 0) return ret; yading@11: yading@11: tracks = start_ebml_master(pb, MATROSKA_ID_TRACKS, 0); yading@11: for (i = 0; i < s->nb_streams; i++) { yading@11: AVStream *st = s->streams[i]; yading@11: default_stream_exists |= st->disposition & AV_DISPOSITION_DEFAULT; yading@11: } yading@11: for (i = 0; i < s->nb_streams; i++) { yading@11: AVStream *st = s->streams[i]; yading@11: AVCodecContext *codec = st->codec; yading@11: ebml_master subinfo, track; yading@11: int native_id = 0; yading@11: int qt_id = 0; yading@11: int bit_depth = av_get_bits_per_sample(codec->codec_id); yading@11: int sample_rate = codec->sample_rate; yading@11: int output_sample_rate = 0; yading@11: AVDictionaryEntry *tag; yading@11: yading@11: if (codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) { yading@11: mkv->have_attachments = 1; yading@11: continue; yading@11: } yading@11: yading@11: if (!bit_depth) yading@11: bit_depth = av_get_bytes_per_sample(codec->sample_fmt) << 3; yading@11: if (!bit_depth) yading@11: bit_depth = codec->bits_per_coded_sample; yading@11: yading@11: if (codec->codec_id == AV_CODEC_ID_AAC) yading@11: get_aac_sample_rates(s, codec, &sample_rate, &output_sample_rate); yading@11: yading@11: track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0); yading@11: put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER , i + 1); yading@11: put_ebml_uint (pb, MATROSKA_ID_TRACKUID , i + 1); yading@11: put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0); // no lacing (yet) yading@11: yading@11: if ((tag = av_dict_get(st->metadata, "title", NULL, 0))) yading@11: put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value); yading@11: tag = av_dict_get(st->metadata, "language", NULL, 0); yading@11: put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag ? tag->value:"und"); yading@11: yading@11: if (default_stream_exists) { yading@11: put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT)); yading@11: } yading@11: if (st->disposition & AV_DISPOSITION_FORCED) yading@11: put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, 1); yading@11: yading@11: // look for a codec ID string specific to mkv to use, yading@11: // if none are found, use AVI codes yading@11: for (j = 0; ff_mkv_codec_tags[j].id != AV_CODEC_ID_NONE; j++) { yading@11: if (ff_mkv_codec_tags[j].id == codec->codec_id) { yading@11: put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str); yading@11: native_id = 1; yading@11: break; yading@11: } yading@11: } yading@11: yading@11: if (mkv->mode == MODE_WEBM && !(codec->codec_id == AV_CODEC_ID_VP8 || yading@11: codec->codec_id == AV_CODEC_ID_VORBIS)) { yading@11: av_log(s, AV_LOG_ERROR, yading@11: "Only VP8 video and Vorbis audio are supported for WebM.\n"); yading@11: return AVERROR(EINVAL); yading@11: } yading@11: yading@11: switch (codec->codec_type) { yading@11: case AVMEDIA_TYPE_VIDEO: yading@11: put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO); yading@11: if(st->avg_frame_rate.num && st->avg_frame_rate.den && 1.0/av_q2d(st->avg_frame_rate) > av_q2d(codec->time_base)) yading@11: put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1E9/av_q2d(st->avg_frame_rate)); yading@11: else yading@11: put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, av_q2d(codec->time_base)*1E9); yading@11: yading@11: if (!native_id && yading@11: ff_codec_get_tag(ff_codec_movvideo_tags, codec->codec_id) && yading@11: (!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id) yading@11: || codec->codec_id == AV_CODEC_ID_SVQ1 yading@11: || codec->codec_id == AV_CODEC_ID_SVQ3 yading@11: || codec->codec_id == AV_CODEC_ID_CINEPAK)) yading@11: qt_id = 1; yading@11: yading@11: if (qt_id) yading@11: put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME"); yading@11: else if (!native_id) { yading@11: // if there is no mkv-specific codec ID, use VFW mode yading@11: put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC"); yading@11: mkv->tracks[i].write_dts = 1; yading@11: } yading@11: yading@11: subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0); yading@11: // XXX: interlace flag? yading@11: put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , codec->width); yading@11: put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, codec->height); yading@11: yading@11: if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) || yading@11: (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) { yading@11: // save stereo mode flag yading@11: uint64_t st_mode = MATROSKA_VIDEO_STEREO_MODE_COUNT; yading@11: yading@11: for (j=0; jvalue, ff_matroska_video_stereo_mode[j])){ yading@11: st_mode = j; yading@11: break; yading@11: } yading@11: yading@11: if ((mkv->mode == MODE_WEBM && st_mode > 3 && st_mode != 11) yading@11: || st_mode >= MATROSKA_VIDEO_STEREO_MODE_COUNT) { yading@11: av_log(s, AV_LOG_ERROR, yading@11: "The specified stereo mode is not valid.\n"); yading@11: return AVERROR(EINVAL); yading@11: } else yading@11: put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, st_mode); yading@11: } yading@11: yading@11: if (st->sample_aspect_ratio.num) { yading@11: int64_t d_width = av_rescale(codec->width, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den); yading@11: if (d_width > INT_MAX) { yading@11: av_log(s, AV_LOG_ERROR, "Overflow in display width\n"); yading@11: return AVERROR(EINVAL); yading@11: } yading@11: put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width); yading@11: put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height); yading@11: } yading@11: yading@11: if (codec->codec_id == AV_CODEC_ID_RAWVIDEO) { yading@11: uint32_t color_space = av_le2ne32(codec->codec_tag); yading@11: put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space)); yading@11: } yading@11: end_ebml_master(pb, subinfo); yading@11: break; yading@11: yading@11: case AVMEDIA_TYPE_AUDIO: yading@11: put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO); yading@11: yading@11: if (!native_id) yading@11: // no mkv-specific ID, use ACM mode yading@11: put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM"); yading@11: yading@11: subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0); yading@11: put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , codec->channels); yading@11: put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate); yading@11: if (output_sample_rate) yading@11: put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate); yading@11: if (bit_depth) yading@11: put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth); yading@11: end_ebml_master(pb, subinfo); yading@11: break; yading@11: yading@11: case AVMEDIA_TYPE_SUBTITLE: yading@11: put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_SUBTITLE); yading@11: if (!native_id) { yading@11: av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", codec->codec_id); yading@11: return AVERROR(ENOSYS); yading@11: } yading@11: break; yading@11: default: yading@11: av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n"); yading@11: break; yading@11: } yading@11: ret = mkv_write_codecprivate(s, pb, codec, native_id, qt_id); yading@11: if (ret < 0) return ret; yading@11: yading@11: end_ebml_master(pb, track); yading@11: yading@11: // ms precision is the de-facto standard timescale for mkv files yading@11: avpriv_set_pts_info(st, 64, 1, 1000); yading@11: } yading@11: end_ebml_master(pb, tracks); yading@11: return 0; yading@11: } yading@11: yading@11: static int mkv_write_chapters(AVFormatContext *s) yading@11: { yading@11: MatroskaMuxContext *mkv = s->priv_data; yading@11: AVIOContext *pb = s->pb; yading@11: ebml_master chapters, editionentry; yading@11: AVRational scale = {1, 1E9}; yading@11: int i, ret; yading@11: yading@11: if (!s->nb_chapters) yading@11: return 0; yading@11: yading@11: ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb)); yading@11: if (ret < 0) return ret; yading@11: yading@11: chapters = start_ebml_master(pb, MATROSKA_ID_CHAPTERS , 0); yading@11: editionentry = start_ebml_master(pb, MATROSKA_ID_EDITIONENTRY, 0); yading@11: put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGDEFAULT, 1); yading@11: put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGHIDDEN , 0); yading@11: for (i = 0; i < s->nb_chapters; i++) { yading@11: ebml_master chapteratom, chapterdisplay; yading@11: AVChapter *c = s->chapters[i]; yading@11: AVDictionaryEntry *t = NULL; yading@11: yading@11: chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0); yading@11: put_ebml_uint(pb, MATROSKA_ID_CHAPTERUID, c->id); yading@11: put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMESTART, yading@11: av_rescale_q(c->start, c->time_base, scale)); yading@11: put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMEEND, yading@11: av_rescale_q(c->end, c->time_base, scale)); yading@11: put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0); yading@11: put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGENABLED, 1); yading@11: if ((t = av_dict_get(c->metadata, "title", NULL, 0))) { yading@11: chapterdisplay = start_ebml_master(pb, MATROSKA_ID_CHAPTERDISPLAY, 0); yading@11: put_ebml_string(pb, MATROSKA_ID_CHAPSTRING, t->value); yading@11: put_ebml_string(pb, MATROSKA_ID_CHAPLANG , "und"); yading@11: end_ebml_master(pb, chapterdisplay); yading@11: } yading@11: end_ebml_master(pb, chapteratom); yading@11: } yading@11: end_ebml_master(pb, editionentry); yading@11: end_ebml_master(pb, chapters); yading@11: return 0; yading@11: } yading@11: yading@11: static void mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t) yading@11: { yading@11: uint8_t *key = av_strdup(t->key); yading@11: uint8_t *p = key; yading@11: const uint8_t *lang = NULL; yading@11: ebml_master tag; yading@11: yading@11: if ((p = strrchr(p, '-')) && yading@11: (lang = av_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL))) yading@11: *p = 0; yading@11: yading@11: p = key; yading@11: while (*p) { yading@11: if (*p == ' ') yading@11: *p = '_'; yading@11: else if (*p >= 'a' && *p <= 'z') yading@11: *p -= 'a' - 'A'; yading@11: p++; yading@11: } yading@11: yading@11: tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0); yading@11: put_ebml_string(pb, MATROSKA_ID_TAGNAME, key); yading@11: if (lang) yading@11: put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang); yading@11: put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value); yading@11: end_ebml_master(pb, tag); yading@11: yading@11: av_freep(&key); yading@11: } yading@11: yading@11: static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid, yading@11: unsigned int uid, ebml_master *tags) yading@11: { yading@11: MatroskaMuxContext *mkv = s->priv_data; yading@11: ebml_master tag, targets; yading@11: AVDictionaryEntry *t = NULL; yading@11: int ret; yading@11: yading@11: if (!tags->pos) { yading@11: ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb)); yading@11: if (ret < 0) return ret; yading@11: yading@11: *tags = start_ebml_master(s->pb, MATROSKA_ID_TAGS, 0); yading@11: } yading@11: yading@11: tag = start_ebml_master(s->pb, MATROSKA_ID_TAG, 0); yading@11: targets = start_ebml_master(s->pb, MATROSKA_ID_TAGTARGETS, 0); yading@11: if (elementid) yading@11: put_ebml_uint(s->pb, elementid, uid); yading@11: end_ebml_master(s->pb, targets); yading@11: yading@11: while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) yading@11: if (av_strcasecmp(t->key, "title") && av_strcasecmp(t->key, "stereo_mode")) yading@11: mkv_write_simpletag(s->pb, t); yading@11: yading@11: end_ebml_master(s->pb, tag); yading@11: return 0; yading@11: } yading@11: yading@11: static int mkv_write_tags(AVFormatContext *s) yading@11: { yading@11: ebml_master tags = {0}; yading@11: int i, ret; yading@11: yading@11: ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL); yading@11: yading@11: if (av_dict_get(s->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX)) { yading@11: ret = mkv_write_tag(s, s->metadata, 0, 0, &tags); yading@11: if (ret < 0) return ret; yading@11: } yading@11: yading@11: for (i = 0; i < s->nb_streams; i++) { yading@11: AVStream *st = s->streams[i]; yading@11: yading@11: if (!av_dict_get(st->metadata, "", 0, AV_DICT_IGNORE_SUFFIX)) yading@11: continue; yading@11: yading@11: ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags); yading@11: if (ret < 0) return ret; yading@11: } yading@11: yading@11: for (i = 0; i < s->nb_chapters; i++) { yading@11: AVChapter *ch = s->chapters[i]; yading@11: yading@11: if (!av_dict_get(ch->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX)) yading@11: continue; yading@11: yading@11: ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id, &tags); yading@11: if (ret < 0) return ret; yading@11: } yading@11: yading@11: if (tags.pos) yading@11: end_ebml_master(s->pb, tags); yading@11: return 0; yading@11: } yading@11: yading@11: static int mkv_write_attachments(AVFormatContext *s) yading@11: { yading@11: MatroskaMuxContext *mkv = s->priv_data; yading@11: AVIOContext *pb = s->pb; yading@11: ebml_master attachments; yading@11: AVLFG c; yading@11: int i, ret; yading@11: yading@11: if (!mkv->have_attachments) yading@11: return 0; yading@11: yading@11: av_lfg_init(&c, av_get_random_seed()); yading@11: yading@11: ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb)); yading@11: if (ret < 0) return ret; yading@11: yading@11: attachments = start_ebml_master(pb, MATROSKA_ID_ATTACHMENTS, 0); yading@11: yading@11: for (i = 0; i < s->nb_streams; i++) { yading@11: AVStream *st = s->streams[i]; yading@11: ebml_master attached_file; yading@11: AVDictionaryEntry *t; yading@11: const char *mimetype = NULL; yading@11: uint64_t fileuid; yading@11: yading@11: if (st->codec->codec_type != AVMEDIA_TYPE_ATTACHMENT) yading@11: continue; yading@11: yading@11: attached_file = start_ebml_master(pb, MATROSKA_ID_ATTACHEDFILE, 0); yading@11: yading@11: if (t = av_dict_get(st->metadata, "title", NULL, 0)) yading@11: put_ebml_string(pb, MATROSKA_ID_FILEDESC, t->value); yading@11: if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) { yading@11: av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i); yading@11: return AVERROR(EINVAL); yading@11: } yading@11: put_ebml_string(pb, MATROSKA_ID_FILENAME, t->value); yading@11: if (t = av_dict_get(st->metadata, "mimetype", NULL, 0)) yading@11: mimetype = t->value; yading@11: else if (st->codec->codec_id != AV_CODEC_ID_NONE ) { yading@11: int i; yading@11: for (i = 0; ff_mkv_mime_tags[i].id != AV_CODEC_ID_NONE; i++) yading@11: if (ff_mkv_mime_tags[i].id == st->codec->codec_id) { yading@11: mimetype = ff_mkv_mime_tags[i].str; yading@11: break; yading@11: } yading@11: } yading@11: if (!mimetype) { yading@11: av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and " yading@11: "it cannot be deduced from the codec id.\n", i); yading@11: return AVERROR(EINVAL); yading@11: } yading@11: yading@11: if (st->codec->flags & CODEC_FLAG_BITEXACT) { yading@11: struct AVSHA *sha = av_sha_alloc(); yading@11: uint8_t digest[20]; yading@11: if (!sha) yading@11: return AVERROR(ENOMEM); yading@11: av_sha_init(sha, 160); yading@11: av_sha_update(sha, st->codec->extradata, st->codec->extradata_size); yading@11: av_sha_final(sha, digest); yading@11: av_free(sha); yading@11: fileuid = AV_RL64(digest); yading@11: } else { yading@11: fileuid = av_lfg_get(&c); yading@11: } yading@11: av_log(s, AV_LOG_VERBOSE, "Using %.16"PRIx64" for attachment %d\n", yading@11: fileuid, i); yading@11: yading@11: put_ebml_string(pb, MATROSKA_ID_FILEMIMETYPE, mimetype); yading@11: put_ebml_binary(pb, MATROSKA_ID_FILEDATA, st->codec->extradata, st->codec->extradata_size); yading@11: put_ebml_uint(pb, MATROSKA_ID_FILEUID, fileuid); yading@11: end_ebml_master(pb, attached_file); yading@11: } yading@11: end_ebml_master(pb, attachments); yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static int mkv_write_header(AVFormatContext *s) yading@11: { yading@11: MatroskaMuxContext *mkv = s->priv_data; yading@11: AVIOContext *pb = s->pb; yading@11: ebml_master ebml_header, segment_info; yading@11: AVDictionaryEntry *tag; yading@11: int ret, i; yading@11: yading@11: if (!strcmp(s->oformat->name, "webm")) mkv->mode = MODE_WEBM; yading@11: else mkv->mode = MODE_MATROSKAv2; yading@11: yading@11: if (s->avoid_negative_ts < 0) yading@11: s->avoid_negative_ts = 1; yading@11: yading@11: for (i = 0; i < s->nb_streams; i++) yading@11: if (s->streams[i]->codec->codec_id == AV_CODEC_ID_ATRAC3 || yading@11: s->streams[i]->codec->codec_id == AV_CODEC_ID_COOK || yading@11: s->streams[i]->codec->codec_id == AV_CODEC_ID_RA_288 || yading@11: s->streams[i]->codec->codec_id == AV_CODEC_ID_SIPR || yading@11: s->streams[i]->codec->codec_id == AV_CODEC_ID_RV10 || yading@11: s->streams[i]->codec->codec_id == AV_CODEC_ID_RV20) { yading@11: av_log(s, AV_LOG_ERROR, yading@11: "The Matroska muxer does not yet support muxing %s\n", yading@11: avcodec_get_name(s->streams[i]->codec->codec_id)); yading@11: return AVERROR_PATCHWELCOME; yading@11: } yading@11: yading@11: mkv->tracks = av_mallocz(s->nb_streams * sizeof(*mkv->tracks)); yading@11: if (!mkv->tracks) yading@11: return AVERROR(ENOMEM); yading@11: yading@11: ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0); yading@11: put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1); yading@11: put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1); yading@11: put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4); yading@11: put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8); yading@11: put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name); yading@11: put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , 2); yading@11: put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2); yading@11: end_ebml_master(pb, ebml_header); yading@11: yading@11: mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0); yading@11: mkv->segment_offset = avio_tell(pb); yading@11: yading@11: // we write 2 seek heads - one at the end of the file to point to each yading@11: // cluster, and one at the beginning to point to all other level one yading@11: // elements (including the seek head at the end of the file), which yading@11: // isn't more than 10 elements if we only write one of each other yading@11: // currently defined level 1 element yading@11: mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10); yading@11: if (!mkv->main_seekhead) yading@11: return AVERROR(ENOMEM); yading@11: yading@11: ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb)); yading@11: if (ret < 0) return ret; yading@11: yading@11: segment_info = start_ebml_master(pb, MATROSKA_ID_INFO, 0); yading@11: put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000); yading@11: if ((tag = av_dict_get(s->metadata, "title", NULL, 0))) yading@11: put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value); yading@11: if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) { yading@11: uint32_t segment_uid[4]; yading@11: AVLFG lfg; yading@11: yading@11: av_lfg_init(&lfg, av_get_random_seed()); yading@11: yading@11: for (i = 0; i < 4; i++) yading@11: segment_uid[i] = av_lfg_get(&lfg); yading@11: yading@11: put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , LIBAVFORMAT_IDENT); yading@11: put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT); yading@11: put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16); yading@11: } yading@11: yading@11: if (tag = av_dict_get(s->metadata, "creation_time", NULL, 0)) { yading@11: // Adjust time so it's relative to 2001-01-01 and convert to nanoseconds. yading@11: int64_t date_utc = (ff_iso8601_to_unix_time(tag->value) - 978307200) * 1000000000; yading@11: uint8_t date_utc_buf[8]; yading@11: AV_WB64(date_utc_buf, date_utc); yading@11: put_ebml_binary(pb, MATROSKA_ID_DATEUTC, date_utc_buf, 8); yading@11: } yading@11: yading@11: // reserve space for the duration yading@11: mkv->duration = 0; yading@11: mkv->duration_offset = avio_tell(pb); yading@11: put_ebml_void(pb, 11); // assumes double-precision float to be written yading@11: end_ebml_master(pb, segment_info); yading@11: yading@11: ret = mkv_write_tracks(s); yading@11: if (ret < 0) return ret; yading@11: yading@11: if (mkv->mode != MODE_WEBM) { yading@11: ret = mkv_write_chapters(s); yading@11: if (ret < 0) return ret; yading@11: yading@11: ret = mkv_write_tags(s); yading@11: if (ret < 0) return ret; yading@11: yading@11: ret = mkv_write_attachments(s); yading@11: if (ret < 0) return ret; yading@11: } yading@11: yading@11: if (!s->pb->seekable) yading@11: mkv_write_seekhead(pb, mkv->main_seekhead); yading@11: yading@11: mkv->cues = mkv_start_cues(mkv->segment_offset); yading@11: if (mkv->cues == NULL) yading@11: return AVERROR(ENOMEM); yading@11: yading@11: av_init_packet(&mkv->cur_audio_pkt); yading@11: mkv->cur_audio_pkt.size = 0; yading@11: mkv->cluster_pos = -1; yading@11: yading@11: avio_flush(pb); yading@11: return 0; yading@11: } yading@11: yading@11: static int mkv_blockgroup_size(int pkt_size) yading@11: { yading@11: int size = pkt_size + 4; yading@11: size += ebml_num_size(size); yading@11: size += 2; // EBML ID for block and block duration yading@11: size += 8; // max size of block duration yading@11: size += ebml_num_size(size); yading@11: size += 1; // blockgroup EBML ID yading@11: return size; yading@11: } yading@11: yading@11: static int ass_get_duration(const uint8_t *p) yading@11: { yading@11: int sh, sm, ss, sc, eh, em, es, ec; yading@11: uint64_t start, end; yading@11: yading@11: if (sscanf(p, "%*[^,],%d:%d:%d%*c%d,%d:%d:%d%*c%d", yading@11: &sh, &sm, &ss, &sc, &eh, &em, &es, &ec) != 8) yading@11: return 0; yading@11: start = 3600000LL*sh + 60000LL*sm + 1000LL*ss + 10LL*sc; yading@11: end = 3600000LL*eh + 60000LL*em + 1000LL*es + 10LL*ec; yading@11: return end - start; yading@11: } yading@11: yading@11: #if FF_API_ASS_SSA yading@11: static int mkv_write_ass_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt) yading@11: { yading@11: MatroskaMuxContext *mkv = s->priv_data; yading@11: int i, layer = 0, max_duration = 0, size, line_size, data_size = pkt->size; yading@11: uint8_t *start, *end, *data = pkt->data; yading@11: ebml_master blockgroup; yading@11: char buffer[2048]; yading@11: yading@11: while (data_size) { yading@11: int duration = ass_get_duration(data); yading@11: max_duration = FFMAX(duration, max_duration); yading@11: end = memchr(data, '\n', data_size); yading@11: size = line_size = end ? end-data+1 : data_size; yading@11: size -= end ? (end[-1]=='\r')+1 : 0; yading@11: start = data; yading@11: for (i=0; i<3; i++, start++) yading@11: if (!(start = memchr(start, ',', size-(start-data)))) yading@11: return max_duration; yading@11: size -= start - data; yading@11: sscanf(data, "Dialogue: %d,", &layer); yading@11: i = snprintf(buffer, sizeof(buffer), "%"PRId64",%d,", yading@11: s->streams[pkt->stream_index]->nb_frames, layer); yading@11: size = FFMIN(i+size, sizeof(buffer)); yading@11: memcpy(buffer+i, start, size-i); yading@11: yading@11: av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, " yading@11: "pts %" PRId64 ", duration %d\n", yading@11: avio_tell(pb), size, pkt->pts, duration); yading@11: blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size)); yading@11: put_ebml_id(pb, MATROSKA_ID_BLOCK); yading@11: put_ebml_num(pb, size+4, 0); yading@11: avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126 yading@11: avio_wb16(pb, pkt->pts - mkv->cluster_pts); yading@11: avio_w8(pb, 0); yading@11: avio_write(pb, buffer, size); yading@11: put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration); yading@11: end_ebml_master(pb, blockgroup); yading@11: yading@11: data += line_size; yading@11: data_size -= line_size; yading@11: } yading@11: yading@11: return max_duration; yading@11: } yading@11: #endif yading@11: yading@11: static void mkv_write_block(AVFormatContext *s, AVIOContext *pb, yading@11: unsigned int blockid, AVPacket *pkt, int flags) yading@11: { yading@11: MatroskaMuxContext *mkv = s->priv_data; yading@11: AVCodecContext *codec = s->streams[pkt->stream_index]->codec; yading@11: uint8_t *data = NULL; yading@11: int offset = 0, size = pkt->size; yading@11: int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts; yading@11: yading@11: av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, " yading@11: "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n", yading@11: avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration, flags); yading@11: if (codec->codec_id == AV_CODEC_ID_H264 && codec->extradata_size > 0 && yading@11: (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1)) yading@11: ff_avc_parse_nal_units_buf(pkt->data, &data, &size); yading@11: else yading@11: data = pkt->data; yading@11: yading@11: if (codec->codec_id == AV_CODEC_ID_PRORES) { yading@11: /* Matroska specification requires to remove the first QuickTime atom yading@11: */ yading@11: size -= 8; yading@11: offset = 8; yading@11: } yading@11: yading@11: put_ebml_id(pb, blockid); yading@11: put_ebml_num(pb, size+4, 0); yading@11: avio_w8(pb, 0x80 | (pkt->stream_index + 1)); // this assumes stream_index is less than 126 yading@11: avio_wb16(pb, ts - mkv->cluster_pts); yading@11: avio_w8(pb, flags); yading@11: avio_write(pb, data + offset, size); yading@11: if (data != pkt->data) yading@11: av_free(data); yading@11: } yading@11: yading@11: static int srt_get_duration(uint8_t **buf) yading@11: { yading@11: int i, duration = 0; yading@11: yading@11: for (i=0; i<2 && !duration; i++) { yading@11: int s_hour, s_min, s_sec, s_hsec, e_hour, e_min, e_sec, e_hsec; yading@11: if (sscanf(*buf, "%d:%2d:%2d%*1[,.]%3d --> %d:%2d:%2d%*1[,.]%3d", yading@11: &s_hour, &s_min, &s_sec, &s_hsec, yading@11: &e_hour, &e_min, &e_sec, &e_hsec) == 8) { yading@11: s_min += 60*s_hour; e_min += 60*e_hour; yading@11: s_sec += 60*s_min; e_sec += 60*e_min; yading@11: s_hsec += 1000*s_sec; e_hsec += 1000*e_sec; yading@11: duration = e_hsec - s_hsec; yading@11: } yading@11: *buf += strcspn(*buf, "\n") + 1; yading@11: } yading@11: return duration; yading@11: } yading@11: yading@11: static int mkv_write_srt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt) yading@11: { yading@11: ebml_master blockgroup; yading@11: AVPacket pkt2 = *pkt; yading@11: int64_t duration = srt_get_duration(&pkt2.data); yading@11: pkt2.size -= pkt2.data - pkt->data; yading@11: yading@11: blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, yading@11: mkv_blockgroup_size(pkt2.size)); yading@11: mkv_write_block(s, pb, MATROSKA_ID_BLOCK, &pkt2, 0); yading@11: put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration); yading@11: end_ebml_master(pb, blockgroup); yading@11: yading@11: return duration; yading@11: } yading@11: yading@11: static void mkv_flush_dynbuf(AVFormatContext *s) yading@11: { yading@11: MatroskaMuxContext *mkv = s->priv_data; yading@11: int bufsize; yading@11: uint8_t *dyn_buf; yading@11: yading@11: if (!mkv->dyn_bc) yading@11: return; yading@11: yading@11: bufsize = avio_close_dyn_buf(mkv->dyn_bc, &dyn_buf); yading@11: avio_write(s->pb, dyn_buf, bufsize); yading@11: av_free(dyn_buf); yading@11: mkv->dyn_bc = NULL; yading@11: } yading@11: yading@11: static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt) yading@11: { yading@11: MatroskaMuxContext *mkv = s->priv_data; yading@11: AVIOContext *pb = s->pb; yading@11: AVCodecContext *codec = s->streams[pkt->stream_index]->codec; yading@11: int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY); yading@11: int duration = pkt->duration; yading@11: int ret; yading@11: int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts; yading@11: yading@11: if (ts == AV_NOPTS_VALUE) { yading@11: av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n"); yading@11: return AVERROR(EINVAL); yading@11: } yading@11: yading@11: if (!s->pb->seekable) { yading@11: if (!mkv->dyn_bc) { yading@11: if ((ret = avio_open_dyn_buf(&mkv->dyn_bc)) < 0) { yading@11: av_log(s, AV_LOG_ERROR, "Failed to open dynamic buffer\n"); yading@11: return ret; yading@11: } yading@11: } yading@11: pb = mkv->dyn_bc; yading@11: } yading@11: yading@11: if (mkv->cluster_pos == -1) { yading@11: mkv->cluster_pos = avio_tell(s->pb); yading@11: mkv->cluster = start_ebml_master(pb, MATROSKA_ID_CLUSTER, 0); yading@11: put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts)); yading@11: mkv->cluster_pts = FFMAX(0, ts); yading@11: } yading@11: yading@11: if (codec->codec_type != AVMEDIA_TYPE_SUBTITLE) { yading@11: mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe << 7); yading@11: #if FF_API_ASS_SSA yading@11: } else if (codec->codec_id == AV_CODEC_ID_SSA) { yading@11: duration = mkv_write_ass_blocks(s, pb, pkt); yading@11: #endif yading@11: } else if (codec->codec_id == AV_CODEC_ID_SRT) { yading@11: duration = mkv_write_srt_blocks(s, pb, pkt); yading@11: } else { yading@11: ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(pkt->size)); yading@11: /* For backward compatibility, prefer convergence_duration. */ yading@11: if (pkt->convergence_duration > 0) { yading@11: duration = pkt->convergence_duration; yading@11: } yading@11: mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 0); yading@11: put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration); yading@11: end_ebml_master(pb, blockgroup); yading@11: } yading@11: yading@11: if (codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe) { yading@11: ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, ts, mkv->cluster_pos); yading@11: if (ret < 0) return ret; yading@11: } yading@11: yading@11: mkv->duration = FFMAX(mkv->duration, ts + duration); yading@11: return 0; yading@11: } yading@11: yading@11: static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt) yading@11: { yading@11: MatroskaMuxContext *mkv = s->priv_data; yading@11: AVIOContext *pb = s->pb->seekable ? s->pb : mkv->dyn_bc; yading@11: AVCodecContext *codec = s->streams[pkt->stream_index]->codec; yading@11: int ret, keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY); yading@11: int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts; yading@11: int cluster_size = avio_tell(pb) - (s->pb->seekable ? mkv->cluster_pos : 0); yading@11: yading@11: // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or yading@11: // after 4k and on a keyframe yading@11: if (mkv->cluster_pos != -1 && yading@11: ((!s->pb->seekable && (cluster_size > 32*1024 || ts > mkv->cluster_pts + 1000)) yading@11: || cluster_size > 5*1024*1024 || ts > mkv->cluster_pts + 5000 yading@11: || (codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe && cluster_size > 4*1024))) { yading@11: av_log(s, AV_LOG_DEBUG, "Starting new cluster at offset %" PRIu64 yading@11: " bytes, pts %" PRIu64 "\n", avio_tell(pb), ts); yading@11: end_ebml_master(pb, mkv->cluster); yading@11: mkv->cluster_pos = -1; yading@11: if (mkv->dyn_bc) yading@11: mkv_flush_dynbuf(s); yading@11: } yading@11: yading@11: // check if we have an audio packet cached yading@11: if (mkv->cur_audio_pkt.size > 0) { yading@11: ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt); yading@11: av_free_packet(&mkv->cur_audio_pkt); yading@11: if (ret < 0) { yading@11: av_log(s, AV_LOG_ERROR, "Could not write cached audio packet ret:%d\n", ret); yading@11: return ret; yading@11: } yading@11: } yading@11: yading@11: // buffer an audio packet to ensure the packet containing the video yading@11: // keyframe's timecode is contained in the same cluster for WebM yading@11: if (codec->codec_type == AVMEDIA_TYPE_AUDIO) { yading@11: mkv->cur_audio_pkt = *pkt; yading@11: mkv->cur_audio_pkt.buf = av_buffer_ref(pkt->buf); yading@11: ret = mkv->cur_audio_pkt.buf ? 0 : AVERROR(ENOMEM); yading@11: } else yading@11: ret = mkv_write_packet_internal(s, pkt); yading@11: return ret; yading@11: } yading@11: yading@11: static int mkv_write_trailer(AVFormatContext *s) yading@11: { yading@11: MatroskaMuxContext *mkv = s->priv_data; yading@11: AVIOContext *pb = s->pb; yading@11: int64_t currentpos, cuespos; yading@11: int ret; yading@11: yading@11: // check if we have an audio packet cached yading@11: if (mkv->cur_audio_pkt.size > 0) { yading@11: ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt); yading@11: av_free_packet(&mkv->cur_audio_pkt); yading@11: if (ret < 0) { yading@11: av_log(s, AV_LOG_ERROR, "Could not write cached audio packet ret:%d\n", ret); yading@11: return ret; yading@11: } yading@11: } yading@11: yading@11: if (mkv->dyn_bc) { yading@11: end_ebml_master(mkv->dyn_bc, mkv->cluster); yading@11: mkv_flush_dynbuf(s); yading@11: } else if (mkv->cluster_pos != -1) { yading@11: end_ebml_master(pb, mkv->cluster); yading@11: } yading@11: yading@11: if (pb->seekable) { yading@11: if (mkv->cues->num_entries) { yading@11: cuespos = mkv_write_cues(pb, mkv->cues, mkv->tracks, s->nb_streams); yading@11: yading@11: ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES, cuespos); yading@11: if (ret < 0) return ret; yading@11: } yading@11: yading@11: mkv_write_seekhead(pb, mkv->main_seekhead); yading@11: yading@11: // update the duration yading@11: av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration); yading@11: currentpos = avio_tell(pb); yading@11: avio_seek(pb, mkv->duration_offset, SEEK_SET); yading@11: put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration); yading@11: yading@11: avio_seek(pb, currentpos, SEEK_SET); yading@11: } yading@11: yading@11: end_ebml_master(pb, mkv->segment); yading@11: av_free(mkv->tracks); yading@11: av_freep(&mkv->cues->entries); yading@11: av_freep(&mkv->cues); yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static int mkv_query_codec(enum AVCodecID codec_id, int std_compliance) yading@11: { yading@11: int i; yading@11: for (i = 0; ff_mkv_codec_tags[i].id != AV_CODEC_ID_NONE; i++) yading@11: if (ff_mkv_codec_tags[i].id == codec_id) yading@11: return 1; yading@11: yading@11: if (std_compliance < FF_COMPLIANCE_NORMAL) { // mkv theoretically supports any yading@11: enum AVMediaType type = avcodec_get_type(codec_id); // video/audio through VFW/ACM yading@11: if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO) yading@11: return 1; yading@11: } yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: const AVCodecTag additional_audio_tags[] = { yading@11: { AV_CODEC_ID_ALAC, 0XFFFFFFFF }, yading@11: { AV_CODEC_ID_EAC3, 0XFFFFFFFF }, yading@11: { AV_CODEC_ID_MLP, 0xFFFFFFFF }, yading@11: { AV_CODEC_ID_OPUS, 0xFFFFFFFF }, yading@11: { AV_CODEC_ID_PCM_S16BE, 0xFFFFFFFF }, yading@11: { AV_CODEC_ID_PCM_S24BE, 0xFFFFFFFF }, yading@11: { AV_CODEC_ID_PCM_S32BE, 0xFFFFFFFF }, yading@11: { AV_CODEC_ID_QDM2, 0xFFFFFFFF }, yading@11: { AV_CODEC_ID_RA_144, 0xFFFFFFFF }, yading@11: { AV_CODEC_ID_RA_288, 0xFFFFFFFF }, yading@11: { AV_CODEC_ID_COOK, 0xFFFFFFFF }, yading@11: { AV_CODEC_ID_TRUEHD, 0xFFFFFFFF }, yading@11: { AV_CODEC_ID_WAVPACK, 0xFFFFFFFF }, yading@11: { AV_CODEC_ID_NONE, 0xFFFFFFFF } yading@11: }; yading@11: yading@11: const AVCodecTag additional_video_tags[] = { yading@11: { AV_CODEC_ID_PRORES, 0xFFFFFFFF }, yading@11: { AV_CODEC_ID_RV10, 0xFFFFFFFF }, yading@11: { AV_CODEC_ID_RV20, 0xFFFFFFFF }, yading@11: { AV_CODEC_ID_RV30, 0xFFFFFFFF }, yading@11: { AV_CODEC_ID_RV40, 0xFFFFFFFF }, yading@11: { AV_CODEC_ID_VP9, 0xFFFFFFFF }, yading@11: { AV_CODEC_ID_NONE, 0xFFFFFFFF } yading@11: }; yading@11: yading@11: #if CONFIG_MATROSKA_MUXER yading@11: AVOutputFormat ff_matroska_muxer = { yading@11: .name = "matroska", yading@11: .long_name = NULL_IF_CONFIG_SMALL("Matroska"), yading@11: .mime_type = "video/x-matroska", yading@11: .extensions = "mkv", yading@11: .priv_data_size = sizeof(MatroskaMuxContext), yading@11: .audio_codec = CONFIG_LIBVORBIS_ENCODER ? yading@11: AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3, yading@11: .video_codec = CONFIG_LIBX264_ENCODER ? yading@11: AV_CODEC_ID_H264 : AV_CODEC_ID_MPEG4, yading@11: .write_header = mkv_write_header, yading@11: .write_packet = mkv_write_packet, yading@11: .write_trailer = mkv_write_trailer, yading@11: .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS | yading@11: AVFMT_TS_NONSTRICT, yading@11: .codec_tag = (const AVCodecTag* const []){ yading@11: ff_codec_bmp_tags, ff_codec_wav_tags, yading@11: additional_audio_tags, additional_video_tags, 0 yading@11: }, yading@11: #if FF_API_ASS_SSA yading@11: .subtitle_codec = AV_CODEC_ID_SSA, yading@11: #else yading@11: .subtitle_codec = AV_CODEC_ID_ASS, yading@11: #endif yading@11: .query_codec = mkv_query_codec, yading@11: }; yading@11: #endif yading@11: yading@11: #if CONFIG_WEBM_MUXER yading@11: AVOutputFormat ff_webm_muxer = { yading@11: .name = "webm", yading@11: .long_name = NULL_IF_CONFIG_SMALL("WebM"), yading@11: .mime_type = "video/webm", yading@11: .extensions = "webm", yading@11: .priv_data_size = sizeof(MatroskaMuxContext), yading@11: .audio_codec = AV_CODEC_ID_VORBIS, yading@11: .video_codec = AV_CODEC_ID_VP8, yading@11: .write_header = mkv_write_header, yading@11: .write_packet = mkv_write_packet, yading@11: .write_trailer = mkv_write_trailer, yading@11: .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS | yading@11: AVFMT_TS_NONSTRICT, yading@11: }; yading@11: #endif yading@11: yading@11: #if CONFIG_MATROSKA_AUDIO_MUXER yading@11: AVOutputFormat ff_matroska_audio_muxer = { yading@11: .name = "matroska", yading@11: .long_name = NULL_IF_CONFIG_SMALL("Matroska"), yading@11: .mime_type = "audio/x-matroska", yading@11: .extensions = "mka", yading@11: .priv_data_size = sizeof(MatroskaMuxContext), yading@11: .audio_codec = CONFIG_LIBVORBIS_ENCODER ? yading@11: AV_CODEC_ID_VORBIS : AV_CODEC_ID_AC3, yading@11: .video_codec = AV_CODEC_ID_NONE, yading@11: .write_header = mkv_write_header, yading@11: .write_packet = mkv_write_packet, yading@11: .write_trailer = mkv_write_trailer, yading@11: .flags = AVFMT_GLOBALHEADER | AVFMT_TS_NONSTRICT, yading@11: .codec_tag = (const AVCodecTag* const []){ yading@11: ff_codec_wav_tags, additional_audio_tags, 0 yading@11: }, yading@11: }; yading@11: #endif