| /* |
| * 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 "avformat.h" |
| #include "internal.h" |
| #include "riff.h" |
| #include "isom.h" |
| #include "matroska.h" |
| #include "avc.h" |
| #include "flacenc.h" |
| #include "avlanguage.h" |
| #include "libavutil/samplefmt.h" |
| #include "libavutil/intreadwrite.h" |
| #include "libavutil/intfloat.h" |
| #include "libavutil/mathematics.h" |
| #include "libavutil/random_seed.h" |
| #include "libavutil/lfg.h" |
| #include "libavutil/dict.h" |
| #include "libavutil/avstring.h" |
| #include "libavcodec/xiph.h" |
| #include "libavcodec/mpeg4audio.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 { |
| uint64_t pts; |
| int tracknum; |
| int64_t cluster_pos; ///< file offset of the cluster containing the block |
| } mkv_cuepoint; |
| |
| typedef struct { |
| int64_t segment_offset; |
| mkv_cuepoint *entries; |
| int num_entries; |
| } mkv_cues; |
| |
| typedef struct { |
| int write_dts; |
| } mkv_track; |
| |
| #define MODE_MATROSKAv2 0x01 |
| #define MODE_WEBM 0x02 |
| |
| typedef struct MatroskaMuxContext { |
| int mode; |
| AVIOContext *dyn_bc; |
| 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; |
| |
| unsigned int audio_buffer_size; |
| AVPacket cur_audio_pkt; |
| |
| int have_attachments; |
| } 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 - 3 1-byte EBML IDs, 3 1-byte EBML sizes, 2 |
| * 8-byte uint max */ |
| #define MAX_CUETRACKPOS_SIZE 22 |
| |
| /** 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 |
| |
| |
| 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, 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) |
| { |
| assert(bytes <= 8); |
| avio_w8(pb, 0x1ff >> bytes); |
| while (--bytes) |
| avio_w8(pb, 0xff); |
| } |
| |
| /** |
| * 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 |
| assert(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. |
| assert(bytes >= needed_bytes); |
| |
| num |= 1ULL << bytes*7; |
| for (i = bytes - 1; i >= 0; i--) |
| avio_w8(pb, 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, 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); |
| |
| assert(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-1, 0); |
| else |
| put_ebml_num(pb, size-9, 8); |
| while(avio_tell(pb) < currentpos + size) |
| avio_w8(pb, 0); |
| } |
| |
| 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 void put_xiph_size(AVIOContext *pb, int size) |
| { |
| int i; |
| for (i = 0; i < size / 255; i++) |
| avio_w8(pb, 255); |
| avio_w8(pb, size % 255); |
| } |
| |
| /** |
| * 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 == NULL) |
| 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, and 3 bytes to guarantee that an EBML void element |
| // will fit afterwards |
| new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 13; |
| 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(entries, (seekhead->num_entries + 1) * sizeof(mkv_seekhead_entry)); |
| if (entries == NULL) |
| return AVERROR(ENOMEM); |
| |
| entries[seekhead->num_entries ].elementid = elementid; |
| entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset; |
| |
| seekhead->entries = entries; |
| 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, mkv_seekhead *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; |
| } |
| } |
| |
| metaseek = start_ebml_master(pb, MATROSKA_ID_SEEKHEAD, seekhead->reserved_size); |
| for (i = 0; i < seekhead->num_entries; i++) { |
| mkv_seekhead_entry *entry = &seekhead->entries[i]; |
| |
| seekentry = start_ebml_master(pb, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE); |
| |
| put_ebml_id(pb, MATROSKA_ID_SEEKID); |
| put_ebml_num(pb, ebml_id_size(entry->elementid), 0); |
| put_ebml_id(pb, entry->elementid); |
| |
| put_ebml_uint(pb, MATROSKA_ID_SEEKPOSITION, entry->segmentpos); |
| end_ebml_master(pb, seekentry); |
| } |
| end_ebml_master(pb, 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_free(seekhead->entries); |
| av_free(seekhead); |
| |
| return currentpos; |
| } |
| |
| static mkv_cues * mkv_start_cues(int64_t segment_offset) |
| { |
| mkv_cues *cues = av_mallocz(sizeof(mkv_cues)); |
| if (cues == NULL) |
| return NULL; |
| |
| cues->segment_offset = segment_offset; |
| return cues; |
| } |
| |
| static int mkv_add_cuepoint(mkv_cues *cues, int stream, int64_t ts, int64_t cluster_pos) |
| { |
| mkv_cuepoint *entries = cues->entries; |
| |
| entries = av_realloc(entries, (cues->num_entries + 1) * sizeof(mkv_cuepoint)); |
| if (entries == NULL) |
| return AVERROR(ENOMEM); |
| |
| if (ts < 0) |
| return 0; |
| |
| entries[cues->num_entries ].pts = ts; |
| entries[cues->num_entries ].tracknum = stream + 1; |
| entries[cues->num_entries++].cluster_pos = cluster_pos - cues->segment_offset; |
| |
| cues->entries = entries; |
| return 0; |
| } |
| |
| static int64_t mkv_write_cues(AVIOContext *pb, mkv_cues *cues, int num_tracks) |
| { |
| ebml_master cues_element; |
| int64_t currentpos; |
| int i, j; |
| |
| currentpos = avio_tell(pb); |
| cues_element = start_ebml_master(pb, MATROSKA_ID_CUES, 0); |
| |
| for (i = 0; i < cues->num_entries; i++) { |
| ebml_master cuepoint, track_positions; |
| mkv_cuepoint *entry = &cues->entries[i]; |
| uint64_t pts = entry->pts; |
| |
| cuepoint = start_ebml_master(pb, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(num_tracks)); |
| put_ebml_uint(pb, 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 < cues->num_entries - i && entry[j].pts == pts; j++) { |
| track_positions = start_ebml_master(pb, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE); |
| put_ebml_uint(pb, MATROSKA_ID_CUETRACK , entry[j].tracknum ); |
| put_ebml_uint(pb, MATROSKA_ID_CUECLUSTERPOSITION, entry[j].cluster_pos); |
| end_ebml_master(pb, track_positions); |
| } |
| i += j - 1; |
| end_ebml_master(pb, cuepoint); |
| } |
| end_ebml_master(pb, cues_element); |
| |
| return currentpos; |
| } |
| |
| static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec) |
| { |
| uint8_t *header_start[3]; |
| int header_len[3]; |
| int first_header_size; |
| int j; |
| |
| if (codec->codec_id == CODEC_ID_VORBIS) |
| first_header_size = 30; |
| else |
| first_header_size = 42; |
| |
| if (avpriv_split_xiph_headers(codec->extradata, codec->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 void get_aac_sample_rates(AVFormatContext *s, AVCodecContext *codec, int *sample_rate, int *output_sample_rate) |
| { |
| MPEG4AudioConfig mp4ac; |
| |
| if (avpriv_mpeg4audio_get_config(&mp4ac, codec->extradata, |
| codec->extradata_size * 8, 1) < 0) { |
| av_log(s, AV_LOG_WARNING, "Error parsing AAC extradata, unable to determine samplerate.\n"); |
| return; |
| } |
| |
| *sample_rate = mp4ac.sample_rate; |
| *output_sample_rate = mp4ac.ext_sample_rate; |
| } |
| |
| static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec, 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) { |
| if (codec->codec_id == CODEC_ID_VORBIS || codec->codec_id == CODEC_ID_THEORA) |
| ret = put_xiph_codecpriv(s, dyn_cp, codec); |
| else if (codec->codec_id == CODEC_ID_FLAC) |
| ret = ff_flac_write_header(dyn_cp, codec, 1); |
| else if (codec->codec_id == CODEC_ID_H264) |
| ret = ff_isom_write_avcc(dyn_cp, codec->extradata, codec->extradata_size); |
| else if (codec->extradata_size) |
| avio_write(dyn_cp, codec->extradata, codec->extradata_size); |
| } else if (codec->codec_type == AVMEDIA_TYPE_VIDEO) { |
| if (qt_id) { |
| if (!codec->codec_tag) |
| codec->codec_tag = ff_codec_get_tag(codec_movvideo_tags, codec->codec_id); |
| if (codec->extradata_size) |
| avio_write(dyn_cp, codec->extradata, codec->extradata_size); |
| } else { |
| if (!codec->codec_tag) |
| codec->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id); |
| if (!codec->codec_tag) { |
| av_log(s, AV_LOG_ERROR, "No bmp codec ID found.\n"); |
| ret = -1; |
| } |
| |
| ff_put_bmp_header(dyn_cp, codec, ff_codec_bmp_tags, 0); |
| } |
| |
| } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
| unsigned int tag; |
| tag = ff_codec_get_tag(ff_codec_wav_tags, codec->codec_id); |
| if (!tag) { |
| av_log(s, AV_LOG_ERROR, "No wav codec ID found.\n"); |
| ret = -1; |
| } |
| if (!codec->codec_tag) |
| codec->codec_tag = tag; |
| |
| ff_put_wav_header(dyn_cp, codec); |
| } |
| |
| 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_tracks(AVFormatContext *s) |
| { |
| MatroskaMuxContext *mkv = s->priv_data; |
| AVIOContext *pb = s->pb; |
| ebml_master tracks; |
| int i, j, ret; |
| |
| ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb)); |
| if (ret < 0) return ret; |
| |
| tracks = start_ebml_master(pb, MATROSKA_ID_TRACKS, 0); |
| for (i = 0; i < s->nb_streams; i++) { |
| AVStream *st = s->streams[i]; |
| AVCodecContext *codec = st->codec; |
| ebml_master subinfo, track; |
| int native_id = 0; |
| int qt_id = 0; |
| int bit_depth = av_get_bits_per_sample(codec->codec_id); |
| int sample_rate = codec->sample_rate; |
| int output_sample_rate = 0; |
| AVDictionaryEntry *tag; |
| |
| if (codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) { |
| mkv->have_attachments = 1; |
| continue; |
| } |
| |
| if (!bit_depth) |
| bit_depth = av_get_bytes_per_sample(codec->sample_fmt) << 3; |
| |
| if (codec->codec_id == CODEC_ID_AAC) |
| get_aac_sample_rates(s, codec, &sample_rate, &output_sample_rate); |
| |
| track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0); |
| put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER , i + 1); |
| put_ebml_uint (pb, MATROSKA_ID_TRACKUID , 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); |
| put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag ? tag->value:"und"); |
| |
| if (st->disposition) |
| put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT)); |
| |
| // look for a codec ID string specific to mkv to use, |
| // if none are found, use AVI codes |
| for (j = 0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++) { |
| if (ff_mkv_codec_tags[j].id == codec->codec_id) { |
| put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str); |
| native_id = 1; |
| break; |
| } |
| } |
| |
| if (mkv->mode == MODE_WEBM && !(codec->codec_id == CODEC_ID_VP8 || |
| codec->codec_id == CODEC_ID_VORBIS)) { |
| av_log(s, AV_LOG_ERROR, |
| "Only VP8 video and Vorbis audio are supported for WebM.\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| switch (codec->codec_type) { |
| case AVMEDIA_TYPE_VIDEO: |
| put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO); |
| if(st->avg_frame_rate.num && st->avg_frame_rate.den && 1.0/av_q2d(st->avg_frame_rate) > av_q2d(codec->time_base)) |
| put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, 1E9/av_q2d(st->avg_frame_rate)); |
| else |
| put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, av_q2d(codec->time_base)*1E9); |
| |
| if (!native_id && |
| ff_codec_get_tag(codec_movvideo_tags, codec->codec_id) && |
| (!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id) |
| || codec->codec_id == CODEC_ID_SVQ1 |
| || codec->codec_id == CODEC_ID_SVQ3 |
| || codec->codec_id == 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; |
| } |
| |
| subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0); |
| // XXX: interlace flag? |
| put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , codec->width); |
| put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, codec->height); |
| |
| if ((tag = av_dict_get(st->metadata, "stereo_mode", NULL, 0)) || |
| (tag = av_dict_get( s->metadata, "stereo_mode", NULL, 0))) { |
| // save stereo mode flag |
| uint64_t st_mode = MATROSKA_VIDEO_STEREO_MODE_COUNT; |
| |
| for (j=0; j<MATROSKA_VIDEO_STEREO_MODE_COUNT; j++) |
| if (!strcmp(tag->value, matroska_video_stereo_mode[j])){ |
| st_mode = j; |
| break; |
| } |
| |
| if ((mkv->mode == MODE_WEBM && st_mode > 3 && st_mode != 11) |
| || st_mode >= MATROSKA_VIDEO_STEREO_MODE_COUNT) { |
| av_log(s, AV_LOG_ERROR, |
| "The specified stereo mode is not valid.\n"); |
| return AVERROR(EINVAL); |
| } else |
| put_ebml_uint(pb, MATROSKA_ID_VIDEOSTEREOMODE, st_mode); |
| } |
| |
| if (st->sample_aspect_ratio.num) { |
| int d_width = codec->width*av_q2d(st->sample_aspect_ratio); |
| put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width); |
| put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height); |
| put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, 3); |
| } |
| |
| if (codec->codec_id == CODEC_ID_RAWVIDEO) { |
| uint32_t color_space = av_le2ne32(codec->codec_tag); |
| put_ebml_binary(pb, MATROSKA_ID_VIDEOCOLORSPACE, &color_space, sizeof(color_space)); |
| } |
| 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 , codec->channels); |
| 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: |
| put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_SUBTITLE); |
| if (!native_id) { |
| av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", codec->codec_id); |
| return AVERROR(ENOSYS); |
| } |
| break; |
| default: |
| av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n"); |
| break; |
| } |
| ret = mkv_write_codecprivate(s, pb, codec, native_id, qt_id); |
| if (ret < 0) return ret; |
| |
| end_ebml_master(pb, track); |
| |
| // ms precision is the de-facto standard timescale for mkv files |
| avpriv_set_pts_info(st, 64, 1, 1000); |
| } |
| end_ebml_master(pb, tracks); |
| return 0; |
| } |
| |
| static int mkv_write_chapters(AVFormatContext *s) |
| { |
| MatroskaMuxContext *mkv = s->priv_data; |
| AVIOContext *pb = s->pb; |
| ebml_master chapters, editionentry; |
| AVRational scale = {1, 1E9}; |
| int i, ret; |
| |
| if (!s->nb_chapters) |
| return 0; |
| |
| ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb)); |
| if (ret < 0) return ret; |
| |
| chapters = start_ebml_master(pb, MATROSKA_ID_CHAPTERS , 0); |
| editionentry = start_ebml_master(pb, MATROSKA_ID_EDITIONENTRY, 0); |
| put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGDEFAULT, 1); |
| put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGHIDDEN , 0); |
| for (i = 0; i < s->nb_chapters; i++) { |
| ebml_master chapteratom, chapterdisplay; |
| AVChapter *c = s->chapters[i]; |
| AVDictionaryEntry *t = NULL; |
| |
| chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0); |
| put_ebml_uint(pb, MATROSKA_ID_CHAPTERUID, c->id); |
| put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMESTART, |
| av_rescale_q(c->start, c->time_base, scale)); |
| put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMEEND, |
| av_rescale_q(c->end, c->time_base, scale)); |
| put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0); |
| put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGENABLED, 1); |
| if ((t = av_dict_get(c->metadata, "title", NULL, 0))) { |
| chapterdisplay = start_ebml_master(pb, MATROSKA_ID_CHAPTERDISPLAY, 0); |
| put_ebml_string(pb, MATROSKA_ID_CHAPSTRING, t->value); |
| put_ebml_string(pb, MATROSKA_ID_CHAPLANG , "und"); |
| end_ebml_master(pb, chapterdisplay); |
| } |
| end_ebml_master(pb, chapteratom); |
| } |
| end_ebml_master(pb, editionentry); |
| end_ebml_master(pb, chapters); |
| return 0; |
| } |
| |
| static void 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 ((p = strrchr(p, '-')) && |
| (lang = av_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); |
| } |
| |
| 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, targets; |
| AVDictionaryEntry *t = NULL; |
| 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; |
| |
| *tags = start_ebml_master(s->pb, MATROSKA_ID_TAGS, 0); |
| } |
| |
| tag = start_ebml_master(s->pb, MATROSKA_ID_TAG, 0); |
| targets = start_ebml_master(s->pb, MATROSKA_ID_TAGTARGETS, 0); |
| if (elementid) |
| put_ebml_uint(s->pb, elementid, uid); |
| end_ebml_master(s->pb, targets); |
| |
| while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX))) |
| if (av_strcasecmp(t->key, "title") && |
| av_strcasecmp(t->key, "stereo_mode") && |
| av_strcasecmp(t->key, "encoding_tool")) |
| mkv_write_simpletag(s->pb, t); |
| |
| end_ebml_master(s->pb, tag); |
| return 0; |
| } |
| |
| static int mkv_write_tags(AVFormatContext *s) |
| { |
| ebml_master tags = {0}; |
| int i, ret; |
| |
| ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL); |
| |
| if (av_dict_get(s->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX)) { |
| ret = mkv_write_tag(s, s->metadata, 0, 0, &tags); |
| if (ret < 0) return ret; |
| } |
| |
| for (i = 0; i < s->nb_streams; i++) { |
| AVStream *st = s->streams[i]; |
| |
| if (!av_dict_get(st->metadata, "", 0, AV_DICT_IGNORE_SUFFIX)) |
| continue; |
| |
| ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags); |
| if (ret < 0) return ret; |
| } |
| |
| for (i = 0; i < s->nb_chapters; i++) { |
| AVChapter *ch = s->chapters[i]; |
| |
| if (!av_dict_get(ch->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX)) |
| continue; |
| |
| ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id, &tags); |
| if (ret < 0) return ret; |
| } |
| |
| if (tags.pos) |
| end_ebml_master(s->pb, tags); |
| return 0; |
| } |
| |
| static int mkv_write_attachments(AVFormatContext *s) |
| { |
| MatroskaMuxContext *mkv = s->priv_data; |
| AVIOContext *pb = s->pb; |
| ebml_master attachments; |
| AVLFG c; |
| int i, ret; |
| |
| if (!mkv->have_attachments) |
| return 0; |
| |
| 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; |
| |
| attachments = start_ebml_master(pb, MATROSKA_ID_ATTACHMENTS, 0); |
| |
| for (i = 0; i < s->nb_streams; i++) { |
| AVStream *st = s->streams[i]; |
| ebml_master attached_file; |
| AVDictionaryEntry *t; |
| const char *mimetype = NULL; |
| |
| if (st->codec->codec_type != AVMEDIA_TYPE_ATTACHMENT) |
| continue; |
| |
| attached_file = start_ebml_master(pb, MATROSKA_ID_ATTACHEDFILE, 0); |
| |
| if (t = av_dict_get(st->metadata, "title", NULL, 0)) |
| put_ebml_string(pb, 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(pb, MATROSKA_ID_FILENAME, t->value); |
| if (t = av_dict_get(st->metadata, "mimetype", NULL, 0)) |
| mimetype = t->value; |
| else if (st->codec->codec_id != CODEC_ID_NONE ) { |
| int i; |
| for (i = 0; ff_mkv_mime_tags[i].id != CODEC_ID_NONE; i++) |
| if (ff_mkv_mime_tags[i].id == st->codec->codec_id) { |
| mimetype = ff_mkv_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); |
| } |
| |
| put_ebml_string(pb, MATROSKA_ID_FILEMIMETYPE, mimetype); |
| put_ebml_binary(pb, MATROSKA_ID_FILEDATA, st->codec->extradata, st->codec->extradata_size); |
| put_ebml_uint(pb, MATROSKA_ID_FILEUID, av_lfg_get(&c)); |
| end_ebml_master(pb, attached_file); |
| } |
| end_ebml_master(pb, attachments); |
| |
| return 0; |
| } |
| |
| static int mkv_write_header(AVFormatContext *s) |
| { |
| MatroskaMuxContext *mkv = s->priv_data; |
| AVIOContext *pb = s->pb; |
| ebml_master ebml_header, segment_info; |
| AVDictionaryEntry *tag; |
| int ret, i; |
| |
| if (!strcmp(s->oformat->name, "webm")) mkv->mode = MODE_WEBM; |
| else mkv->mode = MODE_MATROSKAv2; |
| |
| mkv->tracks = av_mallocz(s->nb_streams * sizeof(*mkv->tracks)); |
| if (!mkv->tracks) |
| return AVERROR(ENOMEM); |
| |
| 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 , 2); |
| 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) |
| return AVERROR(ENOMEM); |
| |
| ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb)); |
| if (ret < 0) return ret; |
| |
| segment_info = start_ebml_master(pb, MATROSKA_ID_INFO, 0); |
| 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->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) { |
| 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_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); |
| put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16); |
| } |
| |
| // reserve space for the duration |
| mkv->duration = 0; |
| mkv->duration_offset = avio_tell(pb); |
| put_ebml_void(pb, 11); // assumes double-precision float to be written |
| end_ebml_master(pb, segment_info); |
| |
| ret = mkv_write_tracks(s); |
| if (ret < 0) return ret; |
| |
| if (mkv->mode != MODE_WEBM) { |
| ret = mkv_write_chapters(s); |
| if (ret < 0) return ret; |
| |
| ret = mkv_write_tags(s); |
| if (ret < 0) return ret; |
| |
| ret = mkv_write_attachments(s); |
| if (ret < 0) return ret; |
| } |
| |
| if (!s->pb->seekable) |
| mkv_write_seekhead(pb, mkv->main_seekhead); |
| |
| mkv->cues = mkv_start_cues(mkv->segment_offset); |
| if (mkv->cues == NULL) |
| return AVERROR(ENOMEM); |
| |
| av_init_packet(&mkv->cur_audio_pkt); |
| mkv->cur_audio_pkt.size = 0; |
| mkv->audio_buffer_size = 0; |
| |
| avio_flush(pb); |
| return 0; |
| } |
| |
| 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 += 8; // max size of block duration |
| size += ebml_num_size(size); |
| size += 1; // blockgroup EBML ID |
| return size; |
| } |
| |
| static int ass_get_duration(const uint8_t *p) |
| { |
| int sh, sm, ss, sc, eh, em, es, ec; |
| uint64_t start, end; |
| |
| if (sscanf(p, "%*[^,],%d:%d:%d%*c%d,%d:%d:%d%*c%d", |
| &sh, &sm, &ss, &sc, &eh, &em, &es, &ec) != 8) |
| return 0; |
| start = 3600000*sh + 60000*sm + 1000*ss + 10*sc; |
| end = 3600000*eh + 60000*em + 1000*es + 10*ec; |
| return end - start; |
| } |
| |
| static int mkv_write_ass_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt) |
| { |
| MatroskaMuxContext *mkv = s->priv_data; |
| int i, layer = 0, max_duration = 0, size, line_size, data_size = pkt->size; |
| uint8_t *start, *end, *data = pkt->data; |
| ebml_master blockgroup; |
| char buffer[2048]; |
| |
| while (data_size) { |
| int duration = ass_get_duration(data); |
| max_duration = FFMAX(duration, max_duration); |
| end = memchr(data, '\n', data_size); |
| size = line_size = end ? end-data+1 : data_size; |
| size -= end ? (end[-1]=='\r')+1 : 0; |
| start = data; |
| for (i=0; i<3; i++, start++) |
| if (!(start = memchr(start, ',', size-(start-data)))) |
| return max_duration; |
| size -= start - data; |
| sscanf(data, "Dialogue: %d,", &layer); |
| i = snprintf(buffer, sizeof(buffer), "%"PRId64",%d,", |
| s->streams[pkt->stream_index]->nb_frames, layer); |
| size = FFMIN(i+size, sizeof(buffer)); |
| memcpy(buffer+i, start, size-i); |
| |
| av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, " |
| "pts %" PRId64 ", duration %d\n", |
| avio_tell(pb), size, pkt->pts, duration); |
| 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, pkt->pts - mkv->cluster_pts); |
| avio_w8(pb, 0); |
| avio_write(pb, buffer, size); |
| put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration); |
| end_ebml_master(pb, blockgroup); |
| |
| data += line_size; |
| data_size -= line_size; |
| } |
| |
| return max_duration; |
| } |
| |
| static void mkv_write_block(AVFormatContext *s, AVIOContext *pb, |
| unsigned int blockid, AVPacket *pkt, int flags) |
| { |
| MatroskaMuxContext *mkv = s->priv_data; |
| AVCodecContext *codec = s->streams[pkt->stream_index]->codec; |
| uint8_t *data = NULL; |
| int size = pkt->size; |
| int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts; |
| |
| av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, " |
| "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n", |
| avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration, flags); |
| if (codec->codec_id == CODEC_ID_H264 && codec->extradata_size > 0 && |
| (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1)) |
| ff_avc_parse_nal_units_buf(pkt->data, &data, &size); |
| else |
| data = pkt->data; |
| put_ebml_id(pb, blockid); |
| 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_write(pb, data, size); |
| if (data != pkt->data) |
| av_free(data); |
| } |
| |
| static int srt_get_duration(uint8_t **buf) |
| { |
| int i, duration = 0; |
| |
| for (i=0; i<2 && !duration; i++) { |
| int s_hour, s_min, s_sec, s_hsec, e_hour, e_min, e_sec, e_hsec; |
| if (sscanf(*buf, "%d:%2d:%2d%*1[,.]%3d --> %d:%2d:%2d%*1[,.]%3d", |
| &s_hour, &s_min, &s_sec, &s_hsec, |
| &e_hour, &e_min, &e_sec, &e_hsec) == 8) { |
| s_min += 60*s_hour; e_min += 60*e_hour; |
| s_sec += 60*s_min; e_sec += 60*e_min; |
| s_hsec += 1000*s_sec; e_hsec += 1000*e_sec; |
| duration = e_hsec - s_hsec; |
| } |
| *buf += strcspn(*buf, "\n") + 1; |
| } |
| return duration; |
| } |
| |
| static int mkv_write_srt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt) |
| { |
| ebml_master blockgroup; |
| AVPacket pkt2 = *pkt; |
| int64_t duration = srt_get_duration(&pkt2.data); |
| pkt2.size -= pkt2.data - pkt->data; |
| |
| blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, |
| mkv_blockgroup_size(pkt2.size)); |
| mkv_write_block(s, pb, MATROSKA_ID_BLOCK, &pkt2, 0); |
| put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration); |
| end_ebml_master(pb, blockgroup); |
| |
| return duration; |
| } |
| |
| static void mkv_flush_dynbuf(AVFormatContext *s) |
| { |
| MatroskaMuxContext *mkv = s->priv_data; |
| int bufsize; |
| uint8_t *dyn_buf; |
| |
| if (!mkv->dyn_bc) |
| return; |
| |
| bufsize = avio_close_dyn_buf(mkv->dyn_bc, &dyn_buf); |
| avio_write(s->pb, dyn_buf, bufsize); |
| av_free(dyn_buf); |
| mkv->dyn_bc = NULL; |
| } |
| |
| static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt) |
| { |
| MatroskaMuxContext *mkv = s->priv_data; |
| AVIOContext *pb = s->pb; |
| AVCodecContext *codec = s->streams[pkt->stream_index]->codec; |
| 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; |
| |
| if (ts == AV_NOPTS_VALUE) { |
| av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| if (!s->pb->seekable) { |
| if (!mkv->dyn_bc) |
| avio_open_dyn_buf(&mkv->dyn_bc); |
| pb = mkv->dyn_bc; |
| } |
| |
| if (!mkv->cluster_pos) { |
| mkv->cluster_pos = avio_tell(s->pb); |
| mkv->cluster = start_ebml_master(pb, MATROSKA_ID_CLUSTER, 0); |
| put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts)); |
| mkv->cluster_pts = FFMAX(0, ts); |
| } |
| |
| if (codec->codec_type != AVMEDIA_TYPE_SUBTITLE) { |
| mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe << 7); |
| } else if (codec->codec_id == CODEC_ID_SSA) { |
| duration = mkv_write_ass_blocks(s, pb, pkt); |
| } else if (codec->codec_id == CODEC_ID_SRT) { |
| duration = mkv_write_srt_blocks(s, pb, pkt); |
| } else { |
| ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(pkt->size)); |
| duration = pkt->convergence_duration; |
| mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 0); |
| put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration); |
| end_ebml_master(pb, blockgroup); |
| } |
| |
| if (codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe) { |
| ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, ts, mkv->cluster_pos); |
| if (ret < 0) return ret; |
| } |
| |
| mkv->duration = FFMAX(mkv->duration, ts + duration); |
| return 0; |
| } |
| |
| static int mkv_copy_packet(MatroskaMuxContext *mkv, const AVPacket *pkt) |
| { |
| uint8_t *data = mkv->cur_audio_pkt.data; |
| mkv->cur_audio_pkt = *pkt; |
| mkv->cur_audio_pkt.data = av_fast_realloc(data, &mkv->audio_buffer_size, pkt->size); |
| if (!mkv->cur_audio_pkt.data) |
| return AVERROR(ENOMEM); |
| |
| memcpy(mkv->cur_audio_pkt.data, pkt->data, pkt->size); |
| mkv->cur_audio_pkt.size = pkt->size; |
| return 0; |
| } |
| |
| static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt) |
| { |
| MatroskaMuxContext *mkv = s->priv_data; |
| AVIOContext *pb = s->pb->seekable ? s->pb : mkv->dyn_bc; |
| AVCodecContext *codec = s->streams[pkt->stream_index]->codec; |
| int ret, keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY); |
| int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts; |
| int cluster_size = avio_tell(pb) - (s->pb->seekable ? mkv->cluster_pos : 0); |
| |
| // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or |
| // after 4k and on a keyframe |
| if (mkv->cluster_pos && |
| ((!s->pb->seekable && (cluster_size > 32*1024 || ts > mkv->cluster_pts + 1000)) |
| || cluster_size > 5*1024*1024 || ts > mkv->cluster_pts + 5000 |
| || (codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe && cluster_size > 4*1024))) { |
| av_log(s, AV_LOG_DEBUG, "Starting new cluster at offset %" PRIu64 |
| " bytes, pts %" PRIu64 "\n", avio_tell(pb), ts); |
| end_ebml_master(pb, mkv->cluster); |
| mkv->cluster_pos = 0; |
| if (mkv->dyn_bc) |
| mkv_flush_dynbuf(s); |
| } |
| |
| // 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); |
| mkv->cur_audio_pkt.size = 0; |
| 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->codec_type == AVMEDIA_TYPE_AUDIO) |
| ret = mkv_copy_packet(mkv, pkt); |
| else |
| ret = mkv_write_packet_internal(s, pkt); |
| return ret; |
| } |
| |
| 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); |
| mkv->cur_audio_pkt.size = 0; |
| 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(mkv->dyn_bc, mkv->cluster); |
| mkv_flush_dynbuf(s); |
| } else if (mkv->cluster_pos) { |
| end_ebml_master(pb, mkv->cluster); |
| } |
| |
| if (pb->seekable) { |
| if (mkv->cues->num_entries) { |
| cuespos = mkv_write_cues(pb, mkv->cues, 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->main_seekhead); |
| |
| // update the duration |
| av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration); |
| currentpos = avio_tell(pb); |
| avio_seek(pb, mkv->duration_offset, SEEK_SET); |
| put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration); |
| |
| avio_seek(pb, currentpos, SEEK_SET); |
| } |
| |
| end_ebml_master(pb, mkv->segment); |
| av_free(mkv->tracks); |
| av_freep(&mkv->cues->entries); |
| av_freep(&mkv->cues); |
| av_destruct_packet(&mkv->cur_audio_pkt); |
| avio_flush(pb); |
| return 0; |
| } |
| |
| static int mkv_query_codec(enum CodecID codec_id, int std_compliance) |
| { |
| int i; |
| for (i = 0; ff_mkv_codec_tags[i].id != CODEC_ID_NONE; i++) |
| if (ff_mkv_codec_tags[i].id == codec_id) |
| return 1; |
| |
| if (std_compliance < FF_COMPLIANCE_NORMAL) { // mkv theoretically supports any |
| enum AVMediaType type = avcodec_get_type(codec_id); // video/audio through VFW/ACM |
| if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO) |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| const AVCodecTag additional_audio_tags[] = { |
| { CODEC_ID_ALAC, 0XFFFFFFFF }, |
| { CODEC_ID_EAC3, 0XFFFFFFFF }, |
| { CODEC_ID_MLP, 0xFFFFFFFF }, |
| { CODEC_ID_PCM_S16BE, 0xFFFFFFFF }, |
| { CODEC_ID_PCM_S24BE, 0xFFFFFFFF }, |
| { CODEC_ID_PCM_S32BE, 0xFFFFFFFF }, |
| { CODEC_ID_QDM2, 0xFFFFFFFF }, |
| { CODEC_ID_RA_144, 0xFFFFFFFF }, |
| { CODEC_ID_RA_288, 0xFFFFFFFF }, |
| { CODEC_ID_COOK, 0xFFFFFFFF }, |
| { CODEC_ID_TRUEHD, 0xFFFFFFFF }, |
| { CODEC_ID_TTA, 0xFFFFFFFF }, |
| { CODEC_ID_WAVPACK, 0xFFFFFFFF }, |
| { CODEC_ID_NONE, 0xFFFFFFFF } |
| }; |
| |
| const AVCodecTag additional_video_tags[] = { |
| { CODEC_ID_PRORES, 0xFFFFFFFF }, |
| { CODEC_ID_RV10, 0xFFFFFFFF }, |
| { CODEC_ID_RV20, 0xFFFFFFFF }, |
| { CODEC_ID_RV30, 0xFFFFFFFF }, |
| { CODEC_ID_RV40, 0xFFFFFFFF }, |
| { CODEC_ID_NONE, 0xFFFFFFFF } |
| }; |
| |
| #if CONFIG_MATROSKA_MUXER |
| AVOutputFormat ff_matroska_muxer = { |
| .name = "matroska", |
| .long_name = NULL_IF_CONFIG_SMALL("Matroska file format"), |
| .mime_type = "video/x-matroska", |
| .extensions = "mkv", |
| .priv_data_size = sizeof(MatroskaMuxContext), |
| #if CONFIG_LIBVORBIS_ENCODER |
| .audio_codec = CODEC_ID_VORBIS, |
| #else |
| .audio_codec = CODEC_ID_AC3, |
| #endif |
| #if CONFIG_LIBX264_ENCODER |
| .video_codec = CODEC_ID_H264, |
| #else |
| .video_codec = CODEC_ID_MPEG4, |
| #endif |
| .write_header = mkv_write_header, |
| .write_packet = mkv_write_packet, |
| .write_trailer = mkv_write_trailer, |
| .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS, |
| .codec_tag = (const AVCodecTag* const []){ |
| ff_codec_bmp_tags, ff_codec_wav_tags, |
| additional_audio_tags, additional_video_tags, 0 |
| }, |
| .subtitle_codec = CODEC_ID_SSA, |
| .query_codec = mkv_query_codec, |
| }; |
| #endif |
| |
| #if CONFIG_WEBM_MUXER |
| AVOutputFormat ff_webm_muxer = { |
| .name = "webm", |
| .long_name = NULL_IF_CONFIG_SMALL("WebM file format"), |
| .mime_type = "video/webm", |
| .extensions = "webm", |
| .priv_data_size = sizeof(MatroskaMuxContext), |
| .audio_codec = CODEC_ID_VORBIS, |
| .video_codec = CODEC_ID_VP8, |
| .write_header = mkv_write_header, |
| .write_packet = mkv_write_packet, |
| .write_trailer = mkv_write_trailer, |
| .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT, |
| }; |
| #endif |
| |
| #if CONFIG_MATROSKA_AUDIO_MUXER |
| AVOutputFormat ff_matroska_audio_muxer = { |
| .name = "matroska", |
| .long_name = NULL_IF_CONFIG_SMALL("Matroska file format"), |
| .mime_type = "audio/x-matroska", |
| .extensions = "mka", |
| .priv_data_size = sizeof(MatroskaMuxContext), |
| #if CONFIG_LIBVORBIS_ENCODER |
| .audio_codec = CODEC_ID_VORBIS, |
| #else |
| .audio_codec = CODEC_ID_AC3, |
| #endif |
| .video_codec = CODEC_ID_NONE, |
| .write_header = mkv_write_header, |
| .write_packet = mkv_write_packet, |
| .write_trailer = mkv_write_trailer, |
| .flags = AVFMT_GLOBALHEADER, |
| .codec_tag = (const AVCodecTag* const []){ |
| ff_codec_wav_tags, additional_audio_tags, 0 |
| }, |
| }; |
| #endif |
