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00022 #include "avformat.h"
00023 #include "internal.h"
00024 #include "riff.h"
00025 #include "isom.h"
00026 #include "matroska.h"
00027 #include "avc.h"
00028 #include "flacenc.h"
00029 #include "avlanguage.h"
00030 #include "libavutil/samplefmt.h"
00031 #include "libavutil/intreadwrite.h"
00032 #include "libavutil/intfloat.h"
00033 #include "libavutil/mathematics.h"
00034 #include "libavutil/random_seed.h"
00035 #include "libavutil/lfg.h"
00036 #include "libavutil/dict.h"
00037 #include "libavutil/avstring.h"
00038 #include "libavcodec/xiph.h"
00039 #include "libavcodec/mpeg4audio.h"
00040
00041 typedef struct ebml_master {
00042 int64_t pos;
00043 int sizebytes;
00044 } ebml_master;
00045
00046 typedef struct mkv_seekhead_entry {
00047 unsigned int elementid;
00048 uint64_t segmentpos;
00049 } mkv_seekhead_entry;
00050
00051 typedef struct mkv_seekhead {
00052 int64_t filepos;
00053 int64_t segment_offset;
00054 int reserved_size;
00055 int max_entries;
00056 mkv_seekhead_entry *entries;
00057 int num_entries;
00058 } mkv_seekhead;
00059
00060 typedef struct {
00061 uint64_t pts;
00062 int tracknum;
00063 int64_t cluster_pos;
00064 } mkv_cuepoint;
00065
00066 typedef struct {
00067 int64_t segment_offset;
00068 mkv_cuepoint *entries;
00069 int num_entries;
00070 } mkv_cues;
00071
00072 typedef struct {
00073 int write_dts;
00074 } mkv_track;
00075
00076 #define MODE_MATROSKAv2 0x01
00077 #define MODE_WEBM 0x02
00078
00079 typedef struct MatroskaMuxContext {
00080 int mode;
00081 AVIOContext *dyn_bc;
00082 ebml_master segment;
00083 int64_t segment_offset;
00084 ebml_master cluster;
00085 int64_t cluster_pos;
00086 int64_t cluster_pts;
00087 int64_t duration_offset;
00088 int64_t duration;
00089 mkv_seekhead *main_seekhead;
00090 mkv_cues *cues;
00091 mkv_track *tracks;
00092
00093 unsigned int audio_buffer_size;
00094 AVPacket cur_audio_pkt;
00095
00096 int have_attachments;
00097 } MatroskaMuxContext;
00098
00099
00102 #define MAX_SEEKENTRY_SIZE 21
00103
00106 #define MAX_CUETRACKPOS_SIZE 22
00107
00109 #define MAX_CUEPOINT_SIZE(num_tracks) 12 + MAX_CUETRACKPOS_SIZE*num_tracks
00110
00111
00112 static int ebml_id_size(unsigned int id)
00113 {
00114 return (av_log2(id+1)-1)/7+1;
00115 }
00116
00117 static void put_ebml_id(AVIOContext *pb, unsigned int id)
00118 {
00119 int i = ebml_id_size(id);
00120 while (i--)
00121 avio_w8(pb, id >> (i*8));
00122 }
00123
00129 static void put_ebml_size_unknown(AVIOContext *pb, int bytes)
00130 {
00131 assert(bytes <= 8);
00132 avio_w8(pb, 0x1ff >> bytes);
00133 while (--bytes)
00134 avio_w8(pb, 0xff);
00135 }
00136
00140 static int ebml_num_size(uint64_t num)
00141 {
00142 int bytes = 1;
00143 while ((num+1) >> bytes*7) bytes++;
00144 return bytes;
00145 }
00146
00153 static void put_ebml_num(AVIOContext *pb, uint64_t num, int bytes)
00154 {
00155 int i, needed_bytes = ebml_num_size(num);
00156
00157
00158 assert(num < (1ULL<<56)-1);
00159
00160 if (bytes == 0)
00161
00162 bytes = needed_bytes;
00163
00164
00165 assert(bytes >= needed_bytes);
00166
00167 num |= 1ULL << bytes*7;
00168 for (i = bytes - 1; i >= 0; i--)
00169 avio_w8(pb, num >> i*8);
00170 }
00171
00172 static void put_ebml_uint(AVIOContext *pb, unsigned int elementid, uint64_t val)
00173 {
00174 int i, bytes = 1;
00175 uint64_t tmp = val;
00176 while (tmp>>=8) bytes++;
00177
00178 put_ebml_id(pb, elementid);
00179 put_ebml_num(pb, bytes, 0);
00180 for (i = bytes - 1; i >= 0; i--)
00181 avio_w8(pb, val >> i*8);
00182 }
00183
00184 static void put_ebml_float(AVIOContext *pb, unsigned int elementid, double val)
00185 {
00186 put_ebml_id(pb, elementid);
00187 put_ebml_num(pb, 8, 0);
00188 avio_wb64(pb, av_double2int(val));
00189 }
00190
00191 static void put_ebml_binary(AVIOContext *pb, unsigned int elementid,
00192 const void *buf, int size)
00193 {
00194 put_ebml_id(pb, elementid);
00195 put_ebml_num(pb, size, 0);
00196 avio_write(pb, buf, size);
00197 }
00198
00199 static void put_ebml_string(AVIOContext *pb, unsigned int elementid, const char *str)
00200 {
00201 put_ebml_binary(pb, elementid, str, strlen(str));
00202 }
00203
00210 static void put_ebml_void(AVIOContext *pb, uint64_t size)
00211 {
00212 int64_t currentpos = avio_tell(pb);
00213
00214 assert(size >= 2);
00215
00216 put_ebml_id(pb, EBML_ID_VOID);
00217
00218
00219
00220 if (size < 10)
00221 put_ebml_num(pb, size-1, 0);
00222 else
00223 put_ebml_num(pb, size-9, 8);
00224 while(avio_tell(pb) < currentpos + size)
00225 avio_w8(pb, 0);
00226 }
00227
00228 static ebml_master start_ebml_master(AVIOContext *pb, unsigned int elementid, uint64_t expectedsize)
00229 {
00230 int bytes = expectedsize ? ebml_num_size(expectedsize) : 8;
00231 put_ebml_id(pb, elementid);
00232 put_ebml_size_unknown(pb, bytes);
00233 return (ebml_master){ avio_tell(pb), bytes };
00234 }
00235
00236 static void end_ebml_master(AVIOContext *pb, ebml_master master)
00237 {
00238 int64_t pos = avio_tell(pb);
00239
00240 if (avio_seek(pb, master.pos - master.sizebytes, SEEK_SET) < 0)
00241 return;
00242 put_ebml_num(pb, pos - master.pos, master.sizebytes);
00243 avio_seek(pb, pos, SEEK_SET);
00244 }
00245
00246 static void put_xiph_size(AVIOContext *pb, int size)
00247 {
00248 int i;
00249 for (i = 0; i < size / 255; i++)
00250 avio_w8(pb, 255);
00251 avio_w8(pb, size % 255);
00252 }
00253
00265 static mkv_seekhead * mkv_start_seekhead(AVIOContext *pb, int64_t segment_offset, int numelements)
00266 {
00267 mkv_seekhead *new_seekhead = av_mallocz(sizeof(mkv_seekhead));
00268 if (new_seekhead == NULL)
00269 return NULL;
00270
00271 new_seekhead->segment_offset = segment_offset;
00272
00273 if (numelements > 0) {
00274 new_seekhead->filepos = avio_tell(pb);
00275
00276
00277
00278 new_seekhead->reserved_size = numelements * MAX_SEEKENTRY_SIZE + 13;
00279 new_seekhead->max_entries = numelements;
00280 put_ebml_void(pb, new_seekhead->reserved_size);
00281 }
00282 return new_seekhead;
00283 }
00284
00285 static int mkv_add_seekhead_entry(mkv_seekhead *seekhead, unsigned int elementid, uint64_t filepos)
00286 {
00287 mkv_seekhead_entry *entries = seekhead->entries;
00288
00289
00290 if (seekhead->max_entries > 0 && seekhead->max_entries <= seekhead->num_entries)
00291 return -1;
00292
00293 entries = av_realloc(entries, (seekhead->num_entries + 1) * sizeof(mkv_seekhead_entry));
00294 if (entries == NULL)
00295 return AVERROR(ENOMEM);
00296
00297 entries[seekhead->num_entries ].elementid = elementid;
00298 entries[seekhead->num_entries++].segmentpos = filepos - seekhead->segment_offset;
00299
00300 seekhead->entries = entries;
00301 return 0;
00302 }
00303
00313 static int64_t mkv_write_seekhead(AVIOContext *pb, mkv_seekhead *seekhead)
00314 {
00315 ebml_master metaseek, seekentry;
00316 int64_t currentpos;
00317 int i;
00318
00319 currentpos = avio_tell(pb);
00320
00321 if (seekhead->reserved_size > 0) {
00322 if (avio_seek(pb, seekhead->filepos, SEEK_SET) < 0) {
00323 currentpos = -1;
00324 goto fail;
00325 }
00326 }
00327
00328 metaseek = start_ebml_master(pb, MATROSKA_ID_SEEKHEAD, seekhead->reserved_size);
00329 for (i = 0; i < seekhead->num_entries; i++) {
00330 mkv_seekhead_entry *entry = &seekhead->entries[i];
00331
00332 seekentry = start_ebml_master(pb, MATROSKA_ID_SEEKENTRY, MAX_SEEKENTRY_SIZE);
00333
00334 put_ebml_id(pb, MATROSKA_ID_SEEKID);
00335 put_ebml_num(pb, ebml_id_size(entry->elementid), 0);
00336 put_ebml_id(pb, entry->elementid);
00337
00338 put_ebml_uint(pb, MATROSKA_ID_SEEKPOSITION, entry->segmentpos);
00339 end_ebml_master(pb, seekentry);
00340 }
00341 end_ebml_master(pb, metaseek);
00342
00343 if (seekhead->reserved_size > 0) {
00344 uint64_t remaining = seekhead->filepos + seekhead->reserved_size - avio_tell(pb);
00345 put_ebml_void(pb, remaining);
00346 avio_seek(pb, currentpos, SEEK_SET);
00347
00348 currentpos = seekhead->filepos;
00349 }
00350 fail:
00351 av_free(seekhead->entries);
00352 av_free(seekhead);
00353
00354 return currentpos;
00355 }
00356
00357 static mkv_cues * mkv_start_cues(int64_t segment_offset)
00358 {
00359 mkv_cues *cues = av_mallocz(sizeof(mkv_cues));
00360 if (cues == NULL)
00361 return NULL;
00362
00363 cues->segment_offset = segment_offset;
00364 return cues;
00365 }
00366
00367 static int mkv_add_cuepoint(mkv_cues *cues, int stream, int64_t ts, int64_t cluster_pos)
00368 {
00369 mkv_cuepoint *entries = cues->entries;
00370
00371 entries = av_realloc(entries, (cues->num_entries + 1) * sizeof(mkv_cuepoint));
00372 if (entries == NULL)
00373 return AVERROR(ENOMEM);
00374
00375 if (ts < 0)
00376 return 0;
00377
00378 entries[cues->num_entries ].pts = ts;
00379 entries[cues->num_entries ].tracknum = stream + 1;
00380 entries[cues->num_entries++].cluster_pos = cluster_pos - cues->segment_offset;
00381
00382 cues->entries = entries;
00383 return 0;
00384 }
00385
00386 static int64_t mkv_write_cues(AVIOContext *pb, mkv_cues *cues, int num_tracks)
00387 {
00388 ebml_master cues_element;
00389 int64_t currentpos;
00390 int i, j;
00391
00392 currentpos = avio_tell(pb);
00393 cues_element = start_ebml_master(pb, MATROSKA_ID_CUES, 0);
00394
00395 for (i = 0; i < cues->num_entries; i++) {
00396 ebml_master cuepoint, track_positions;
00397 mkv_cuepoint *entry = &cues->entries[i];
00398 uint64_t pts = entry->pts;
00399
00400 cuepoint = start_ebml_master(pb, MATROSKA_ID_POINTENTRY, MAX_CUEPOINT_SIZE(num_tracks));
00401 put_ebml_uint(pb, MATROSKA_ID_CUETIME, pts);
00402
00403
00404
00405 for (j = 0; j < cues->num_entries - i && entry[j].pts == pts; j++) {
00406 track_positions = start_ebml_master(pb, MATROSKA_ID_CUETRACKPOSITION, MAX_CUETRACKPOS_SIZE);
00407 put_ebml_uint(pb, MATROSKA_ID_CUETRACK , entry[j].tracknum );
00408 put_ebml_uint(pb, MATROSKA_ID_CUECLUSTERPOSITION, entry[j].cluster_pos);
00409 end_ebml_master(pb, track_positions);
00410 }
00411 i += j - 1;
00412 end_ebml_master(pb, cuepoint);
00413 }
00414 end_ebml_master(pb, cues_element);
00415
00416 return currentpos;
00417 }
00418
00419 static int put_xiph_codecpriv(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec)
00420 {
00421 uint8_t *header_start[3];
00422 int header_len[3];
00423 int first_header_size;
00424 int j;
00425
00426 if (codec->codec_id == CODEC_ID_VORBIS)
00427 first_header_size = 30;
00428 else
00429 first_header_size = 42;
00430
00431 if (avpriv_split_xiph_headers(codec->extradata, codec->extradata_size,
00432 first_header_size, header_start, header_len) < 0) {
00433 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
00434 return -1;
00435 }
00436
00437 avio_w8(pb, 2);
00438 for (j = 0; j < 2; j++) {
00439 put_xiph_size(pb, header_len[j]);
00440 }
00441 for (j = 0; j < 3; j++)
00442 avio_write(pb, header_start[j], header_len[j]);
00443
00444 return 0;
00445 }
00446
00447 static void get_aac_sample_rates(AVFormatContext *s, AVCodecContext *codec, int *sample_rate, int *output_sample_rate)
00448 {
00449 MPEG4AudioConfig mp4ac;
00450
00451 if (avpriv_mpeg4audio_get_config(&mp4ac, codec->extradata,
00452 codec->extradata_size * 8, 1) < 0) {
00453 av_log(s, AV_LOG_WARNING, "Error parsing AAC extradata, unable to determine samplerate.\n");
00454 return;
00455 }
00456
00457 *sample_rate = mp4ac.sample_rate;
00458 *output_sample_rate = mp4ac.ext_sample_rate;
00459 }
00460
00461 static int mkv_write_codecprivate(AVFormatContext *s, AVIOContext *pb, AVCodecContext *codec, int native_id, int qt_id)
00462 {
00463 AVIOContext *dyn_cp;
00464 uint8_t *codecpriv;
00465 int ret, codecpriv_size;
00466
00467 ret = avio_open_dyn_buf(&dyn_cp);
00468 if(ret < 0)
00469 return ret;
00470
00471 if (native_id) {
00472 if (codec->codec_id == CODEC_ID_VORBIS || codec->codec_id == CODEC_ID_THEORA)
00473 ret = put_xiph_codecpriv(s, dyn_cp, codec);
00474 else if (codec->codec_id == CODEC_ID_FLAC)
00475 ret = ff_flac_write_header(dyn_cp, codec, 1);
00476 else if (codec->codec_id == CODEC_ID_H264)
00477 ret = ff_isom_write_avcc(dyn_cp, codec->extradata, codec->extradata_size);
00478 else if (codec->extradata_size)
00479 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
00480 } else if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
00481 if (qt_id) {
00482 if (!codec->codec_tag)
00483 codec->codec_tag = ff_codec_get_tag(codec_movvideo_tags, codec->codec_id);
00484 if (codec->extradata_size)
00485 avio_write(dyn_cp, codec->extradata, codec->extradata_size);
00486 } else {
00487 if (!codec->codec_tag)
00488 codec->codec_tag = ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id);
00489 if (!codec->codec_tag) {
00490 av_log(s, AV_LOG_ERROR, "No bmp codec ID found.\n");
00491 ret = -1;
00492 }
00493
00494 ff_put_bmp_header(dyn_cp, codec, ff_codec_bmp_tags, 0);
00495 }
00496
00497 } else if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
00498 unsigned int tag;
00499 tag = ff_codec_get_tag(ff_codec_wav_tags, codec->codec_id);
00500 if (!tag) {
00501 av_log(s, AV_LOG_ERROR, "No wav codec ID found.\n");
00502 ret = -1;
00503 }
00504 if (!codec->codec_tag)
00505 codec->codec_tag = tag;
00506
00507 ff_put_wav_header(dyn_cp, codec);
00508 }
00509
00510 codecpriv_size = avio_close_dyn_buf(dyn_cp, &codecpriv);
00511 if (codecpriv_size)
00512 put_ebml_binary(pb, MATROSKA_ID_CODECPRIVATE, codecpriv, codecpriv_size);
00513 av_free(codecpriv);
00514 return ret;
00515 }
00516
00517 static int mkv_write_tracks(AVFormatContext *s)
00518 {
00519 MatroskaMuxContext *mkv = s->priv_data;
00520 AVIOContext *pb = s->pb;
00521 ebml_master tracks;
00522 int i, j, ret;
00523
00524 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TRACKS, avio_tell(pb));
00525 if (ret < 0) return ret;
00526
00527 tracks = start_ebml_master(pb, MATROSKA_ID_TRACKS, 0);
00528 for (i = 0; i < s->nb_streams; i++) {
00529 AVStream *st = s->streams[i];
00530 AVCodecContext *codec = st->codec;
00531 ebml_master subinfo, track;
00532 int native_id = 0;
00533 int qt_id = 0;
00534 int bit_depth = av_get_bits_per_sample(codec->codec_id);
00535 int sample_rate = codec->sample_rate;
00536 int output_sample_rate = 0;
00537 AVDictionaryEntry *tag;
00538
00539 if (codec->codec_type == AVMEDIA_TYPE_ATTACHMENT) {
00540 mkv->have_attachments = 1;
00541 continue;
00542 }
00543
00544 if (!bit_depth)
00545 bit_depth = av_get_bytes_per_sample(codec->sample_fmt) << 3;
00546
00547 if (codec->codec_id == CODEC_ID_AAC)
00548 get_aac_sample_rates(s, codec, &sample_rate, &output_sample_rate);
00549
00550 track = start_ebml_master(pb, MATROSKA_ID_TRACKENTRY, 0);
00551 put_ebml_uint (pb, MATROSKA_ID_TRACKNUMBER , i + 1);
00552 put_ebml_uint (pb, MATROSKA_ID_TRACKUID , i + 1);
00553 put_ebml_uint (pb, MATROSKA_ID_TRACKFLAGLACING , 0);
00554
00555 if ((tag = av_dict_get(st->metadata, "title", NULL, 0)))
00556 put_ebml_string(pb, MATROSKA_ID_TRACKNAME, tag->value);
00557 tag = av_dict_get(st->metadata, "language", NULL, 0);
00558 put_ebml_string(pb, MATROSKA_ID_TRACKLANGUAGE, tag ? tag->value:"und");
00559
00560 if (st->disposition)
00561 put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition & AV_DISPOSITION_DEFAULT));
00562
00563
00564
00565 for (j = 0; ff_mkv_codec_tags[j].id != CODEC_ID_NONE; j++) {
00566 if (ff_mkv_codec_tags[j].id == codec->codec_id) {
00567 put_ebml_string(pb, MATROSKA_ID_CODECID, ff_mkv_codec_tags[j].str);
00568 native_id = 1;
00569 break;
00570 }
00571 }
00572
00573 if (mkv->mode == MODE_WEBM && !(codec->codec_id == CODEC_ID_VP8 ||
00574 codec->codec_id == CODEC_ID_VORBIS)) {
00575 av_log(s, AV_LOG_ERROR,
00576 "Only VP8 video and Vorbis audio are supported for WebM.\n");
00577 return AVERROR(EINVAL);
00578 }
00579
00580 switch (codec->codec_type) {
00581 case AVMEDIA_TYPE_VIDEO:
00582 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_VIDEO);
00583 put_ebml_uint(pb, MATROSKA_ID_TRACKDEFAULTDURATION, av_q2d(codec->time_base)*1E9);
00584
00585 if (!native_id &&
00586 ff_codec_get_tag(codec_movvideo_tags, codec->codec_id) &&
00587 (!ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id)
00588 || codec->codec_id == CODEC_ID_SVQ1
00589 || codec->codec_id == CODEC_ID_SVQ3
00590 || codec->codec_id == CODEC_ID_CINEPAK))
00591 qt_id = 1;
00592
00593 if (qt_id)
00594 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_QUICKTIME");
00595 else if (!native_id) {
00596
00597 put_ebml_string(pb, MATROSKA_ID_CODECID, "V_MS/VFW/FOURCC");
00598 mkv->tracks[i].write_dts = 1;
00599 }
00600
00601 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKVIDEO, 0);
00602
00603 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELWIDTH , codec->width);
00604 put_ebml_uint (pb, MATROSKA_ID_VIDEOPIXELHEIGHT, codec->height);
00605 if ((tag = av_dict_get(s->metadata, "stereo_mode", NULL, 0))) {
00606 uint8_t stereo_fmt = atoi(tag->value);
00607 int valid_fmt = 0;
00608
00609 switch (mkv->mode) {
00610 case MODE_WEBM:
00611 if (stereo_fmt <= MATROSKA_VIDEO_STEREOMODE_TYPE_TOP_BOTTOM
00612 || stereo_fmt == MATROSKA_VIDEO_STEREOMODE_TYPE_RIGHT_LEFT)
00613 valid_fmt = 1;
00614 break;
00615 case MODE_MATROSKAv2:
00616 if (stereo_fmt <= MATROSKA_VIDEO_STEREOMODE_TYPE_BOTH_EYES_BLOCK_RL)
00617 valid_fmt = 1;
00618 break;
00619 }
00620
00621 if (valid_fmt)
00622 put_ebml_uint (pb, MATROSKA_ID_VIDEOSTEREOMODE, stereo_fmt);
00623 }
00624 if (st->sample_aspect_ratio.num) {
00625 int d_width = codec->width*av_q2d(st->sample_aspect_ratio);
00626 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYWIDTH , d_width);
00627 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYHEIGHT, codec->height);
00628 put_ebml_uint(pb, MATROSKA_ID_VIDEODISPLAYUNIT, 3);
00629 }
00630 end_ebml_master(pb, subinfo);
00631 break;
00632
00633 case AVMEDIA_TYPE_AUDIO:
00634 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_AUDIO);
00635
00636 if (!native_id)
00637
00638 put_ebml_string(pb, MATROSKA_ID_CODECID, "A_MS/ACM");
00639
00640 subinfo = start_ebml_master(pb, MATROSKA_ID_TRACKAUDIO, 0);
00641 put_ebml_uint (pb, MATROSKA_ID_AUDIOCHANNELS , codec->channels);
00642 put_ebml_float (pb, MATROSKA_ID_AUDIOSAMPLINGFREQ, sample_rate);
00643 if (output_sample_rate)
00644 put_ebml_float(pb, MATROSKA_ID_AUDIOOUTSAMPLINGFREQ, output_sample_rate);
00645 if (bit_depth)
00646 put_ebml_uint(pb, MATROSKA_ID_AUDIOBITDEPTH, bit_depth);
00647 end_ebml_master(pb, subinfo);
00648 break;
00649
00650 case AVMEDIA_TYPE_SUBTITLE:
00651 put_ebml_uint(pb, MATROSKA_ID_TRACKTYPE, MATROSKA_TRACK_TYPE_SUBTITLE);
00652 if (!native_id) {
00653 av_log(s, AV_LOG_ERROR, "Subtitle codec %d is not supported.\n", codec->codec_id);
00654 return AVERROR(ENOSYS);
00655 }
00656 break;
00657 default:
00658 av_log(s, AV_LOG_ERROR, "Only audio, video, and subtitles are supported for Matroska.\n");
00659 break;
00660 }
00661 ret = mkv_write_codecprivate(s, pb, codec, native_id, qt_id);
00662 if (ret < 0) return ret;
00663
00664 end_ebml_master(pb, track);
00665
00666
00667 avpriv_set_pts_info(st, 64, 1, 1000);
00668 }
00669 end_ebml_master(pb, tracks);
00670 return 0;
00671 }
00672
00673 static int mkv_write_chapters(AVFormatContext *s)
00674 {
00675 MatroskaMuxContext *mkv = s->priv_data;
00676 AVIOContext *pb = s->pb;
00677 ebml_master chapters, editionentry;
00678 AVRational scale = {1, 1E9};
00679 int i, ret;
00680
00681 if (!s->nb_chapters)
00682 return 0;
00683
00684 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CHAPTERS, avio_tell(pb));
00685 if (ret < 0) return ret;
00686
00687 chapters = start_ebml_master(pb, MATROSKA_ID_CHAPTERS , 0);
00688 editionentry = start_ebml_master(pb, MATROSKA_ID_EDITIONENTRY, 0);
00689 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGDEFAULT, 1);
00690 put_ebml_uint(pb, MATROSKA_ID_EDITIONFLAGHIDDEN , 0);
00691 for (i = 0; i < s->nb_chapters; i++) {
00692 ebml_master chapteratom, chapterdisplay;
00693 AVChapter *c = s->chapters[i];
00694 AVDictionaryEntry *t = NULL;
00695
00696 chapteratom = start_ebml_master(pb, MATROSKA_ID_CHAPTERATOM, 0);
00697 put_ebml_uint(pb, MATROSKA_ID_CHAPTERUID, c->id);
00698 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMESTART,
00699 av_rescale_q(c->start, c->time_base, scale));
00700 put_ebml_uint(pb, MATROSKA_ID_CHAPTERTIMEEND,
00701 av_rescale_q(c->end, c->time_base, scale));
00702 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGHIDDEN , 0);
00703 put_ebml_uint(pb, MATROSKA_ID_CHAPTERFLAGENABLED, 1);
00704 if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
00705 chapterdisplay = start_ebml_master(pb, MATROSKA_ID_CHAPTERDISPLAY, 0);
00706 put_ebml_string(pb, MATROSKA_ID_CHAPSTRING, t->value);
00707 put_ebml_string(pb, MATROSKA_ID_CHAPLANG , "und");
00708 end_ebml_master(pb, chapterdisplay);
00709 }
00710 end_ebml_master(pb, chapteratom);
00711 }
00712 end_ebml_master(pb, editionentry);
00713 end_ebml_master(pb, chapters);
00714 return 0;
00715 }
00716
00717 static void mkv_write_simpletag(AVIOContext *pb, AVDictionaryEntry *t)
00718 {
00719 uint8_t *key = av_strdup(t->key);
00720 uint8_t *p = key;
00721 const uint8_t *lang = NULL;
00722 ebml_master tag;
00723
00724 if ((p = strrchr(p, '-')) &&
00725 (lang = av_convert_lang_to(p + 1, AV_LANG_ISO639_2_BIBL)))
00726 *p = 0;
00727
00728 p = key;
00729 while (*p) {
00730 if (*p == ' ')
00731 *p = '_';
00732 else if (*p >= 'a' && *p <= 'z')
00733 *p -= 'a' - 'A';
00734 p++;
00735 }
00736
00737 tag = start_ebml_master(pb, MATROSKA_ID_SIMPLETAG, 0);
00738 put_ebml_string(pb, MATROSKA_ID_TAGNAME, key);
00739 if (lang)
00740 put_ebml_string(pb, MATROSKA_ID_TAGLANG, lang);
00741 put_ebml_string(pb, MATROSKA_ID_TAGSTRING, t->value);
00742 end_ebml_master(pb, tag);
00743
00744 av_freep(&key);
00745 }
00746
00747 static int mkv_write_tag(AVFormatContext *s, AVDictionary *m, unsigned int elementid,
00748 unsigned int uid, ebml_master *tags)
00749 {
00750 MatroskaMuxContext *mkv = s->priv_data;
00751 ebml_master tag, targets;
00752 AVDictionaryEntry *t = NULL;
00753 int ret;
00754
00755 if (!tags->pos) {
00756 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_TAGS, avio_tell(s->pb));
00757 if (ret < 0) return ret;
00758
00759 *tags = start_ebml_master(s->pb, MATROSKA_ID_TAGS, 0);
00760 }
00761
00762 tag = start_ebml_master(s->pb, MATROSKA_ID_TAG, 0);
00763 targets = start_ebml_master(s->pb, MATROSKA_ID_TAGTARGETS, 0);
00764 if (elementid)
00765 put_ebml_uint(s->pb, elementid, uid);
00766 end_ebml_master(s->pb, targets);
00767
00768 while ((t = av_dict_get(m, "", t, AV_DICT_IGNORE_SUFFIX)))
00769 if (av_strcasecmp(t->key, "title") &&
00770 av_strcasecmp(t->key, "encoding_tool"))
00771 mkv_write_simpletag(s->pb, t);
00772
00773 end_ebml_master(s->pb, tag);
00774 return 0;
00775 }
00776
00777 static int mkv_write_tags(AVFormatContext *s)
00778 {
00779 ebml_master tags = {0};
00780 int i, ret;
00781
00782 ff_metadata_conv_ctx(s, ff_mkv_metadata_conv, NULL);
00783
00784 if (av_dict_get(s->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX)) {
00785 ret = mkv_write_tag(s, s->metadata, 0, 0, &tags);
00786 if (ret < 0) return ret;
00787 }
00788
00789 for (i = 0; i < s->nb_streams; i++) {
00790 AVStream *st = s->streams[i];
00791
00792 if (!av_dict_get(st->metadata, "", 0, AV_DICT_IGNORE_SUFFIX))
00793 continue;
00794
00795 ret = mkv_write_tag(s, st->metadata, MATROSKA_ID_TAGTARGETS_TRACKUID, i + 1, &tags);
00796 if (ret < 0) return ret;
00797 }
00798
00799 for (i = 0; i < s->nb_chapters; i++) {
00800 AVChapter *ch = s->chapters[i];
00801
00802 if (!av_dict_get(ch->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX))
00803 continue;
00804
00805 ret = mkv_write_tag(s, ch->metadata, MATROSKA_ID_TAGTARGETS_CHAPTERUID, ch->id, &tags);
00806 if (ret < 0) return ret;
00807 }
00808
00809 if (tags.pos)
00810 end_ebml_master(s->pb, tags);
00811 return 0;
00812 }
00813
00814 static int mkv_write_attachments(AVFormatContext *s)
00815 {
00816 MatroskaMuxContext *mkv = s->priv_data;
00817 AVIOContext *pb = s->pb;
00818 ebml_master attachments;
00819 AVLFG c;
00820 int i, ret;
00821
00822 if (!mkv->have_attachments)
00823 return 0;
00824
00825 av_lfg_init(&c, av_get_random_seed());
00826
00827 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_ATTACHMENTS, avio_tell(pb));
00828 if (ret < 0) return ret;
00829
00830 attachments = start_ebml_master(pb, MATROSKA_ID_ATTACHMENTS, 0);
00831
00832 for (i = 0; i < s->nb_streams; i++) {
00833 AVStream *st = s->streams[i];
00834 ebml_master attached_file;
00835 AVDictionaryEntry *t;
00836 const char *mimetype = NULL;
00837
00838 if (st->codec->codec_type != AVMEDIA_TYPE_ATTACHMENT)
00839 continue;
00840
00841 attached_file = start_ebml_master(pb, MATROSKA_ID_ATTACHEDFILE, 0);
00842
00843 if (t = av_dict_get(st->metadata, "title", NULL, 0))
00844 put_ebml_string(pb, MATROSKA_ID_FILEDESC, t->value);
00845 if (!(t = av_dict_get(st->metadata, "filename", NULL, 0))) {
00846 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no filename tag.\n", i);
00847 return AVERROR(EINVAL);
00848 }
00849 put_ebml_string(pb, MATROSKA_ID_FILENAME, t->value);
00850 if (t = av_dict_get(st->metadata, "mimetype", NULL, 0))
00851 mimetype = t->value;
00852 else if (st->codec->codec_id != CODEC_ID_NONE ) {
00853 int i;
00854 for (i = 0; ff_mkv_mime_tags[i].id != CODEC_ID_NONE; i++)
00855 if (ff_mkv_mime_tags[i].id == st->codec->codec_id) {
00856 mimetype = ff_mkv_mime_tags[i].str;
00857 break;
00858 }
00859 }
00860 if (!mimetype) {
00861 av_log(s, AV_LOG_ERROR, "Attachment stream %d has no mimetype tag and "
00862 "it cannot be deduced from the codec id.\n", i);
00863 return AVERROR(EINVAL);
00864 }
00865
00866 put_ebml_string(pb, MATROSKA_ID_FILEMIMETYPE, mimetype);
00867 put_ebml_binary(pb, MATROSKA_ID_FILEDATA, st->codec->extradata, st->codec->extradata_size);
00868 put_ebml_uint(pb, MATROSKA_ID_FILEUID, av_lfg_get(&c));
00869 end_ebml_master(pb, attached_file);
00870 }
00871 end_ebml_master(pb, attachments);
00872
00873 return 0;
00874 }
00875
00876 static int mkv_write_header(AVFormatContext *s)
00877 {
00878 MatroskaMuxContext *mkv = s->priv_data;
00879 AVIOContext *pb = s->pb;
00880 ebml_master ebml_header, segment_info;
00881 AVDictionaryEntry *tag;
00882 int ret, i;
00883
00884 if (!strcmp(s->oformat->name, "webm")) mkv->mode = MODE_WEBM;
00885 else mkv->mode = MODE_MATROSKAv2;
00886
00887 mkv->tracks = av_mallocz(s->nb_streams * sizeof(*mkv->tracks));
00888 if (!mkv->tracks)
00889 return AVERROR(ENOMEM);
00890
00891 ebml_header = start_ebml_master(pb, EBML_ID_HEADER, 0);
00892 put_ebml_uint (pb, EBML_ID_EBMLVERSION , 1);
00893 put_ebml_uint (pb, EBML_ID_EBMLREADVERSION , 1);
00894 put_ebml_uint (pb, EBML_ID_EBMLMAXIDLENGTH , 4);
00895 put_ebml_uint (pb, EBML_ID_EBMLMAXSIZELENGTH , 8);
00896 put_ebml_string (pb, EBML_ID_DOCTYPE , s->oformat->name);
00897 put_ebml_uint (pb, EBML_ID_DOCTYPEVERSION , 2);
00898 put_ebml_uint (pb, EBML_ID_DOCTYPEREADVERSION , 2);
00899 end_ebml_master(pb, ebml_header);
00900
00901 mkv->segment = start_ebml_master(pb, MATROSKA_ID_SEGMENT, 0);
00902 mkv->segment_offset = avio_tell(pb);
00903
00904
00905
00906
00907
00908
00909 mkv->main_seekhead = mkv_start_seekhead(pb, mkv->segment_offset, 10);
00910 if (!mkv->main_seekhead)
00911 return AVERROR(ENOMEM);
00912
00913 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_INFO, avio_tell(pb));
00914 if (ret < 0) return ret;
00915
00916 segment_info = start_ebml_master(pb, MATROSKA_ID_INFO, 0);
00917 put_ebml_uint(pb, MATROSKA_ID_TIMECODESCALE, 1000000);
00918 if ((tag = av_dict_get(s->metadata, "title", NULL, 0)))
00919 put_ebml_string(pb, MATROSKA_ID_TITLE, tag->value);
00920 if (!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT)) {
00921 uint32_t segment_uid[4];
00922 AVLFG lfg;
00923
00924 av_lfg_init(&lfg, av_get_random_seed());
00925
00926 for (i = 0; i < 4; i++)
00927 segment_uid[i] = av_lfg_get(&lfg);
00928
00929 put_ebml_string(pb, MATROSKA_ID_MUXINGAPP , LIBAVFORMAT_IDENT);
00930 if ((tag = av_dict_get(s->metadata, "encoding_tool", NULL, 0)))
00931 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, tag->value);
00932 else
00933 put_ebml_string(pb, MATROSKA_ID_WRITINGAPP, LIBAVFORMAT_IDENT);
00934 put_ebml_binary(pb, MATROSKA_ID_SEGMENTUID, segment_uid, 16);
00935 }
00936
00937
00938 mkv->duration = 0;
00939 mkv->duration_offset = avio_tell(pb);
00940 put_ebml_void(pb, 11);
00941 end_ebml_master(pb, segment_info);
00942
00943 ret = mkv_write_tracks(s);
00944 if (ret < 0) return ret;
00945
00946 if (mkv->mode != MODE_WEBM) {
00947 ret = mkv_write_chapters(s);
00948 if (ret < 0) return ret;
00949
00950 ret = mkv_write_tags(s);
00951 if (ret < 0) return ret;
00952
00953 ret = mkv_write_attachments(s);
00954 if (ret < 0) return ret;
00955 }
00956
00957 if (!s->pb->seekable)
00958 mkv_write_seekhead(pb, mkv->main_seekhead);
00959
00960 mkv->cues = mkv_start_cues(mkv->segment_offset);
00961 if (mkv->cues == NULL)
00962 return AVERROR(ENOMEM);
00963
00964 av_init_packet(&mkv->cur_audio_pkt);
00965 mkv->cur_audio_pkt.size = 0;
00966 mkv->audio_buffer_size = 0;
00967
00968 avio_flush(pb);
00969 return 0;
00970 }
00971
00972 static int mkv_blockgroup_size(int pkt_size)
00973 {
00974 int size = pkt_size + 4;
00975 size += ebml_num_size(size);
00976 size += 2;
00977 size += 8;
00978 size += ebml_num_size(size);
00979 size += 1;
00980 return size;
00981 }
00982
00983 static int ass_get_duration(const uint8_t *p)
00984 {
00985 int sh, sm, ss, sc, eh, em, es, ec;
00986 uint64_t start, end;
00987
00988 if (sscanf(p, "%*[^,],%d:%d:%d%*c%d,%d:%d:%d%*c%d",
00989 &sh, &sm, &ss, &sc, &eh, &em, &es, &ec) != 8)
00990 return 0;
00991 start = 3600000*sh + 60000*sm + 1000*ss + 10*sc;
00992 end = 3600000*eh + 60000*em + 1000*es + 10*ec;
00993 return end - start;
00994 }
00995
00996 static int mkv_write_ass_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
00997 {
00998 MatroskaMuxContext *mkv = s->priv_data;
00999 int i, layer = 0, max_duration = 0, size, line_size, data_size = pkt->size;
01000 uint8_t *start, *end, *data = pkt->data;
01001 ebml_master blockgroup;
01002 char buffer[2048];
01003
01004 while (data_size) {
01005 int duration = ass_get_duration(data);
01006 max_duration = FFMAX(duration, max_duration);
01007 end = memchr(data, '\n', data_size);
01008 size = line_size = end ? end-data+1 : data_size;
01009 size -= end ? (end[-1]=='\r')+1 : 0;
01010 start = data;
01011 for (i=0; i<3; i++, start++)
01012 if (!(start = memchr(start, ',', size-(start-data))))
01013 return max_duration;
01014 size -= start - data;
01015 sscanf(data, "Dialogue: %d,", &layer);
01016 i = snprintf(buffer, sizeof(buffer), "%"PRId64",%d,",
01017 s->streams[pkt->stream_index]->nb_frames, layer);
01018 size = FFMIN(i+size, sizeof(buffer));
01019 memcpy(buffer+i, start, size-i);
01020
01021 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
01022 "pts %" PRId64 ", duration %d\n",
01023 avio_tell(pb), size, pkt->pts, duration);
01024 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(size));
01025 put_ebml_id(pb, MATROSKA_ID_BLOCK);
01026 put_ebml_num(pb, size+4, 0);
01027 avio_w8(pb, 0x80 | (pkt->stream_index + 1));
01028 avio_wb16(pb, pkt->pts - mkv->cluster_pts);
01029 avio_w8(pb, 0);
01030 avio_write(pb, buffer, size);
01031 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
01032 end_ebml_master(pb, blockgroup);
01033
01034 data += line_size;
01035 data_size -= line_size;
01036 }
01037
01038 return max_duration;
01039 }
01040
01041 static void mkv_write_block(AVFormatContext *s, AVIOContext *pb,
01042 unsigned int blockid, AVPacket *pkt, int flags)
01043 {
01044 MatroskaMuxContext *mkv = s->priv_data;
01045 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
01046 uint8_t *data = NULL;
01047 int size = pkt->size;
01048 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
01049
01050 av_log(s, AV_LOG_DEBUG, "Writing block at offset %" PRIu64 ", size %d, "
01051 "pts %" PRId64 ", dts %" PRId64 ", duration %d, flags %d\n",
01052 avio_tell(pb), pkt->size, pkt->pts, pkt->dts, pkt->duration, flags);
01053 if (codec->codec_id == CODEC_ID_H264 && codec->extradata_size > 0 &&
01054 (AV_RB24(codec->extradata) == 1 || AV_RB32(codec->extradata) == 1))
01055 ff_avc_parse_nal_units_buf(pkt->data, &data, &size);
01056 else
01057 data = pkt->data;
01058 put_ebml_id(pb, blockid);
01059 put_ebml_num(pb, size+4, 0);
01060 avio_w8(pb, 0x80 | (pkt->stream_index + 1));
01061 avio_wb16(pb, ts - mkv->cluster_pts);
01062 avio_w8(pb, flags);
01063 avio_write(pb, data, size);
01064 if (data != pkt->data)
01065 av_free(data);
01066 }
01067
01068 static int srt_get_duration(uint8_t **buf)
01069 {
01070 int i, duration = 0;
01071
01072 for (i=0; i<2 && !duration; i++) {
01073 int s_hour, s_min, s_sec, s_hsec, e_hour, e_min, e_sec, e_hsec;
01074 if (sscanf(*buf, "%d:%2d:%2d%*1[,.]%3d --> %d:%2d:%2d%*1[,.]%3d",
01075 &s_hour, &s_min, &s_sec, &s_hsec,
01076 &e_hour, &e_min, &e_sec, &e_hsec) == 8) {
01077 s_min += 60*s_hour; e_min += 60*e_hour;
01078 s_sec += 60*s_min; e_sec += 60*e_min;
01079 s_hsec += 1000*s_sec; e_hsec += 1000*e_sec;
01080 duration = e_hsec - s_hsec;
01081 }
01082 *buf += strcspn(*buf, "\n") + 1;
01083 }
01084 return duration;
01085 }
01086
01087 static int mkv_write_srt_blocks(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
01088 {
01089 ebml_master blockgroup;
01090 AVPacket pkt2 = *pkt;
01091 int64_t duration = srt_get_duration(&pkt2.data);
01092 pkt2.size -= pkt2.data - pkt->data;
01093
01094 blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP,
01095 mkv_blockgroup_size(pkt2.size));
01096 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, &pkt2, 0);
01097 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
01098 end_ebml_master(pb, blockgroup);
01099
01100 return duration;
01101 }
01102
01103 static void mkv_flush_dynbuf(AVFormatContext *s)
01104 {
01105 MatroskaMuxContext *mkv = s->priv_data;
01106 int bufsize;
01107 uint8_t *dyn_buf;
01108
01109 if (!mkv->dyn_bc)
01110 return;
01111
01112 bufsize = avio_close_dyn_buf(mkv->dyn_bc, &dyn_buf);
01113 avio_write(s->pb, dyn_buf, bufsize);
01114 av_free(dyn_buf);
01115 mkv->dyn_bc = NULL;
01116 }
01117
01118 static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
01119 {
01120 MatroskaMuxContext *mkv = s->priv_data;
01121 AVIOContext *pb = s->pb;
01122 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
01123 int keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
01124 int duration = pkt->duration;
01125 int ret;
01126 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
01127
01128 if (ts == AV_NOPTS_VALUE) {
01129 av_log(s, AV_LOG_ERROR, "Can't write packet with unknown timestamp\n");
01130 return AVERROR(EINVAL);
01131 }
01132
01133 if (!s->pb->seekable) {
01134 if (!mkv->dyn_bc)
01135 avio_open_dyn_buf(&mkv->dyn_bc);
01136 pb = mkv->dyn_bc;
01137 }
01138
01139 if (!mkv->cluster_pos) {
01140 mkv->cluster_pos = avio_tell(s->pb);
01141 mkv->cluster = start_ebml_master(pb, MATROSKA_ID_CLUSTER, 0);
01142 put_ebml_uint(pb, MATROSKA_ID_CLUSTERTIMECODE, FFMAX(0, ts));
01143 mkv->cluster_pts = FFMAX(0, ts);
01144 }
01145
01146 if (codec->codec_type != AVMEDIA_TYPE_SUBTITLE) {
01147 mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe << 7);
01148 } else if (codec->codec_id == CODEC_ID_SSA) {
01149 duration = mkv_write_ass_blocks(s, pb, pkt);
01150 } else if (codec->codec_id == CODEC_ID_SRT) {
01151 duration = mkv_write_srt_blocks(s, pb, pkt);
01152 } else {
01153 ebml_master blockgroup = start_ebml_master(pb, MATROSKA_ID_BLOCKGROUP, mkv_blockgroup_size(pkt->size));
01154 duration = pkt->convergence_duration;
01155 mkv_write_block(s, pb, MATROSKA_ID_BLOCK, pkt, 0);
01156 put_ebml_uint(pb, MATROSKA_ID_BLOCKDURATION, duration);
01157 end_ebml_master(pb, blockgroup);
01158 }
01159
01160 if (codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe) {
01161 ret = mkv_add_cuepoint(mkv->cues, pkt->stream_index, ts, mkv->cluster_pos);
01162 if (ret < 0) return ret;
01163 }
01164
01165 mkv->duration = FFMAX(mkv->duration, ts + duration);
01166 return 0;
01167 }
01168
01169 static int mkv_copy_packet(MatroskaMuxContext *mkv, const AVPacket *pkt)
01170 {
01171 uint8_t *data = mkv->cur_audio_pkt.data;
01172 mkv->cur_audio_pkt = *pkt;
01173 mkv->cur_audio_pkt.data = av_fast_realloc(data, &mkv->audio_buffer_size, pkt->size);
01174 if (!mkv->cur_audio_pkt.data)
01175 return AVERROR(ENOMEM);
01176
01177 memcpy(mkv->cur_audio_pkt.data, pkt->data, pkt->size);
01178 mkv->cur_audio_pkt.size = pkt->size;
01179 return 0;
01180 }
01181
01182 static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
01183 {
01184 MatroskaMuxContext *mkv = s->priv_data;
01185 AVIOContext *pb = s->pb->seekable ? s->pb : mkv->dyn_bc;
01186 AVCodecContext *codec = s->streams[pkt->stream_index]->codec;
01187 int ret, keyframe = !!(pkt->flags & AV_PKT_FLAG_KEY);
01188 int64_t ts = mkv->tracks[pkt->stream_index].write_dts ? pkt->dts : pkt->pts;
01189 int cluster_size = avio_tell(pb) - (s->pb->seekable ? mkv->cluster_pos : 0);
01190
01191
01192
01193 if (mkv->cluster_pos &&
01194 ((!s->pb->seekable && (cluster_size > 32*1024 || ts > mkv->cluster_pts + 1000))
01195 || cluster_size > 5*1024*1024 || ts > mkv->cluster_pts + 5000
01196 || (codec->codec_type == AVMEDIA_TYPE_VIDEO && keyframe && cluster_size > 4*1024))) {
01197 av_log(s, AV_LOG_DEBUG, "Starting new cluster at offset %" PRIu64
01198 " bytes, pts %" PRIu64 "\n", avio_tell(pb), ts);
01199 end_ebml_master(pb, mkv->cluster);
01200 mkv->cluster_pos = 0;
01201 if (mkv->dyn_bc)
01202 mkv_flush_dynbuf(s);
01203 }
01204
01205
01206 if (mkv->cur_audio_pkt.size > 0) {
01207 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
01208 mkv->cur_audio_pkt.size = 0;
01209 if (ret < 0) {
01210 av_log(s, AV_LOG_ERROR, "Could not write cached audio packet ret:%d\n", ret);
01211 return ret;
01212 }
01213 }
01214
01215
01216
01217 if (codec->codec_type == AVMEDIA_TYPE_AUDIO)
01218 ret = mkv_copy_packet(mkv, pkt);
01219 else
01220 ret = mkv_write_packet_internal(s, pkt);
01221 return ret;
01222 }
01223
01224 static int mkv_write_trailer(AVFormatContext *s)
01225 {
01226 MatroskaMuxContext *mkv = s->priv_data;
01227 AVIOContext *pb = s->pb;
01228 int64_t currentpos, cuespos;
01229 int ret;
01230
01231
01232 if (mkv->cur_audio_pkt.size > 0) {
01233 ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
01234 mkv->cur_audio_pkt.size = 0;
01235 if (ret < 0) {
01236 av_log(s, AV_LOG_ERROR, "Could not write cached audio packet ret:%d\n", ret);
01237 return ret;
01238 }
01239 }
01240
01241 if (mkv->dyn_bc) {
01242 end_ebml_master(mkv->dyn_bc, mkv->cluster);
01243 mkv_flush_dynbuf(s);
01244 } else if (mkv->cluster_pos) {
01245 end_ebml_master(pb, mkv->cluster);
01246 }
01247
01248 if (pb->seekable) {
01249 if (mkv->cues->num_entries) {
01250 cuespos = mkv_write_cues(pb, mkv->cues, s->nb_streams);
01251
01252 ret = mkv_add_seekhead_entry(mkv->main_seekhead, MATROSKA_ID_CUES, cuespos);
01253 if (ret < 0) return ret;
01254 }
01255
01256 mkv_write_seekhead(pb, mkv->main_seekhead);
01257
01258
01259 av_log(s, AV_LOG_DEBUG, "end duration = %" PRIu64 "\n", mkv->duration);
01260 currentpos = avio_tell(pb);
01261 avio_seek(pb, mkv->duration_offset, SEEK_SET);
01262 put_ebml_float(pb, MATROSKA_ID_DURATION, mkv->duration);
01263
01264 avio_seek(pb, currentpos, SEEK_SET);
01265 }
01266
01267 end_ebml_master(pb, mkv->segment);
01268 av_free(mkv->tracks);
01269 av_freep(&mkv->cues->entries);
01270 av_freep(&mkv->cues);
01271 av_destruct_packet(&mkv->cur_audio_pkt);
01272 avio_flush(pb);
01273 return 0;
01274 }
01275
01276 static int mkv_query_codec(enum CodecID codec_id, int std_compliance)
01277 {
01278 int i;
01279 for (i = 0; ff_mkv_codec_tags[i].id != CODEC_ID_NONE; i++)
01280 if (ff_mkv_codec_tags[i].id == codec_id)
01281 return 1;
01282
01283 if (std_compliance < FF_COMPLIANCE_NORMAL) {
01284 enum AVMediaType type = avcodec_get_type(codec_id);
01285 if (type == AVMEDIA_TYPE_VIDEO || type == AVMEDIA_TYPE_AUDIO)
01286 return 1;
01287 }
01288
01289 return 0;
01290 }
01291
01292 #if CONFIG_MATROSKA_MUXER
01293 AVOutputFormat ff_matroska_muxer = {
01294 .name = "matroska",
01295 .long_name = NULL_IF_CONFIG_SMALL("Matroska file format"),
01296 .mime_type = "video/x-matroska",
01297 .extensions = "mkv",
01298 .priv_data_size = sizeof(MatroskaMuxContext),
01299 #if CONFIG_LIBVORBIS_ENCODER
01300 .audio_codec = CODEC_ID_VORBIS,
01301 #else
01302 .audio_codec = CODEC_ID_AC3,
01303 #endif
01304 #if CONFIG_LIBX264_ENCODER
01305 .video_codec = CODEC_ID_H264,
01306 #else
01307 .video_codec = CODEC_ID_MPEG4,
01308 #endif
01309 .write_header = mkv_write_header,
01310 .write_packet = mkv_write_packet,
01311 .write_trailer = mkv_write_trailer,
01312 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS,
01313 .codec_tag = (const AVCodecTag* const []){ff_codec_bmp_tags, ff_codec_wav_tags, 0},
01314 .subtitle_codec = CODEC_ID_SSA,
01315 .query_codec = mkv_query_codec,
01316 };
01317 #endif
01318
01319 #if CONFIG_WEBM_MUXER
01320 AVOutputFormat ff_webm_muxer = {
01321 .name = "webm",
01322 .long_name = NULL_IF_CONFIG_SMALL("WebM file format"),
01323 .mime_type = "video/webm",
01324 .extensions = "webm",
01325 .priv_data_size = sizeof(MatroskaMuxContext),
01326 .audio_codec = CODEC_ID_VORBIS,
01327 .video_codec = CODEC_ID_VP8,
01328 .write_header = mkv_write_header,
01329 .write_packet = mkv_write_packet,
01330 .write_trailer = mkv_write_trailer,
01331 .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS,
01332 };
01333 #endif
01334
01335 #if CONFIG_MATROSKA_AUDIO_MUXER
01336 AVOutputFormat ff_matroska_audio_muxer = {
01337 .name = "matroska",
01338 .long_name = NULL_IF_CONFIG_SMALL("Matroska file format"),
01339 .mime_type = "audio/x-matroska",
01340 .extensions = "mka",
01341 .priv_data_size = sizeof(MatroskaMuxContext),
01342 #if CONFIG_LIBVORBIS_ENCODER
01343 .audio_codec = CODEC_ID_VORBIS,
01344 #else
01345 .audio_codec = CODEC_ID_AC3,
01346 #endif
01347 .video_codec = CODEC_ID_NONE,
01348 .write_header = mkv_write_header,
01349 .write_packet = mkv_write_packet,
01350 .write_trailer = mkv_write_trailer,
01351 .flags = AVFMT_GLOBALHEADER,
01352 .codec_tag = (const AVCodecTag* const []){ff_codec_wav_tags, 0},
01353 };
01354 #endif