Libav
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00001 /* 00002 * ASF muxer 00003 * Copyright (c) 2000, 2001 Fabrice Bellard 00004 * 00005 * This file is part of FFmpeg. 00006 * 00007 * FFmpeg is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * FFmpeg is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with FFmpeg; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 #include "avformat.h" 00022 #include "metadata.h" 00023 #include "riff.h" 00024 #include "asf.h" 00025 00026 #undef NDEBUG 00027 #include <assert.h> 00028 00029 00030 #define ASF_INDEXED_INTERVAL 10000000 00031 #define ASF_INDEX_BLOCK 600 00032 00033 #define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2 00034 #define ASF_PACKET_ERROR_CORRECTION_FLAGS (\ 00035 ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT | \ 00036 ASF_PACKET_ERROR_CORRECTION_DATA_SIZE\ 00037 ) 00038 00039 #if (ASF_PACKET_ERROR_CORRECTION_FLAGS != 0) 00040 # define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 1 00041 #else 00042 # define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 0 00043 #endif 00044 00045 #define ASF_PPI_PROPERTY_FLAGS (\ 00046 ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE | \ 00047 ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD | \ 00048 ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE | \ 00049 ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE \ 00050 ) 00051 00052 #define ASF_PPI_LENGTH_TYPE_FLAGS 0 00053 00054 #define ASF_PAYLOAD_FLAGS ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD 00055 00056 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE)) 00057 # define ASF_PPI_SEQUENCE_FIELD_SIZE 1 00058 #endif 00059 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE)) 00060 # define ASF_PPI_SEQUENCE_FIELD_SIZE 2 00061 #endif 00062 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE)) 00063 # define ASF_PPI_SEQUENCE_FIELD_SIZE 4 00064 #endif 00065 #ifndef ASF_PPI_SEQUENCE_FIELD_SIZE 00066 # define ASF_PPI_SEQUENCE_FIELD_SIZE 0 00067 #endif 00068 00069 00070 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE)) 00071 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 1 00072 #endif 00073 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE)) 00074 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 2 00075 #endif 00076 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE)) 00077 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 4 00078 #endif 00079 #ifndef ASF_PPI_PACKET_LENGTH_FIELD_SIZE 00080 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 0 00081 #endif 00082 00083 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE)) 00084 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 1 00085 #endif 00086 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE)) 00087 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 2 00088 #endif 00089 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE)) 00090 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 4 00091 #endif 00092 #ifndef ASF_PPI_PADDING_LENGTH_FIELD_SIZE 00093 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 0 00094 #endif 00095 00096 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE)) 00097 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 1 00098 #endif 00099 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE)) 00100 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 2 00101 #endif 00102 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE)) 00103 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 4 00104 #endif 00105 #ifndef ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 00106 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 0 00107 #endif 00108 00109 #if (ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE)) 00110 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 1 00111 #endif 00112 #if (ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE)) 00113 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 2 00114 #endif 00115 #if (ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE)) 00116 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 4 00117 #endif 00118 #ifndef ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 00119 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 0 00120 #endif 00121 00122 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE)) 00123 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 1 00124 #endif 00125 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE)) 00126 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 2 00127 #endif 00128 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE)) 00129 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 4 00130 #endif 00131 #ifndef ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 00132 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 0 00133 #endif 00134 00135 #if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE)) 00136 # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 1 00137 #endif 00138 #if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE)) 00139 # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 2 00140 #endif 00141 #ifndef ASF_PAYLOAD_LENGTH_FIELD_SIZE 00142 # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 0 00143 #endif 00144 00145 #define PACKET_HEADER_MIN_SIZE (\ 00146 ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE + \ 00147 ASF_PACKET_ERROR_CORRECTION_DATA_SIZE + \ 00148 1 + /*Length Type Flags*/ \ 00149 1 + /*Property Flags*/ \ 00150 ASF_PPI_PACKET_LENGTH_FIELD_SIZE + \ 00151 ASF_PPI_SEQUENCE_FIELD_SIZE + \ 00152 ASF_PPI_PADDING_LENGTH_FIELD_SIZE + \ 00153 4 + /*Send Time Field*/ \ 00154 2 /*Duration Field*/ \ 00155 ) 00156 00157 00158 // Replicated Data shall be at least 8 bytes long. 00159 #define ASF_PAYLOAD_REPLICATED_DATA_LENGTH 0x08 00160 00161 #define PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD (\ 00162 1 + /*Stream Number*/ \ 00163 ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \ 00164 ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \ 00165 ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \ 00166 ASF_PAYLOAD_REPLICATED_DATA_LENGTH \ 00167 ) 00168 00169 #define PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS (\ 00170 1 + /*Stream Number*/ \ 00171 ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \ 00172 ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \ 00173 ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \ 00174 ASF_PAYLOAD_REPLICATED_DATA_LENGTH + \ 00175 ASF_PAYLOAD_LENGTH_FIELD_SIZE \ 00176 ) 00177 00178 #define SINGLE_PAYLOAD_DATA_LENGTH (\ 00179 PACKET_SIZE - \ 00180 PACKET_HEADER_MIN_SIZE - \ 00181 PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD \ 00182 ) 00183 00184 #define MULTI_PAYLOAD_CONSTANT (\ 00185 PACKET_SIZE - \ 00186 PACKET_HEADER_MIN_SIZE - \ 00187 1 - /*Payload Flags*/ \ 00188 2*PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS \ 00189 ) 00190 00191 static const AVCodecTag codec_asf_bmp_tags[] = { 00192 { CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') }, 00193 { CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') }, 00194 { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') }, 00195 { CODEC_ID_NONE, 0 }, 00196 }; 00197 00198 #define PREROLL_TIME 3100 00199 00200 static void put_guid(ByteIOContext *s, const ff_asf_guid *g) 00201 { 00202 assert(sizeof(*g) == 16); 00203 put_buffer(s, *g, sizeof(*g)); 00204 } 00205 00206 static void put_str16(ByteIOContext *s, const char *tag) 00207 { 00208 int len; 00209 uint8_t *pb; 00210 ByteIOContext *dyn_buf; 00211 if (url_open_dyn_buf(&dyn_buf) < 0) 00212 return; 00213 00214 ff_put_str16_nolen(dyn_buf, tag); 00215 len = url_close_dyn_buf(dyn_buf, &pb); 00216 put_le16(s, len); 00217 put_buffer(s, pb, len); 00218 av_freep(&pb); 00219 } 00220 00221 static int64_t put_header(ByteIOContext *pb, const ff_asf_guid *g) 00222 { 00223 int64_t pos; 00224 00225 pos = url_ftell(pb); 00226 put_guid(pb, g); 00227 put_le64(pb, 24); 00228 return pos; 00229 } 00230 00231 /* update header size */ 00232 static void end_header(ByteIOContext *pb, int64_t pos) 00233 { 00234 int64_t pos1; 00235 00236 pos1 = url_ftell(pb); 00237 url_fseek(pb, pos + 16, SEEK_SET); 00238 put_le64(pb, pos1 - pos); 00239 url_fseek(pb, pos1, SEEK_SET); 00240 } 00241 00242 /* write an asf chunk (only used in streaming case) */ 00243 static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags) 00244 { 00245 ASFContext *asf = s->priv_data; 00246 ByteIOContext *pb = s->pb; 00247 int length; 00248 00249 length = payload_length + 8; 00250 put_le16(pb, type); 00251 put_le16(pb, length); //size 00252 put_le32(pb, asf->seqno);//sequence number 00253 put_le16(pb, flags); /* unknown bytes */ 00254 put_le16(pb, length); //size_confirm 00255 asf->seqno++; 00256 } 00257 00258 /* convert from unix to windows time */ 00259 static int64_t unix_to_file_time(int ti) 00260 { 00261 int64_t t; 00262 00263 t = ti * INT64_C(10000000); 00264 t += INT64_C(116444736000000000); 00265 return t; 00266 } 00267 00268 /* write the header (used two times if non streamed) */ 00269 static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size) 00270 { 00271 ASFContext *asf = s->priv_data; 00272 ByteIOContext *pb = s->pb; 00273 AVMetadataTag *tags[5]; 00274 int header_size, n, extra_size, extra_size2, wav_extra_size, file_time; 00275 int has_title; 00276 int metadata_count; 00277 AVCodecContext *enc; 00278 int64_t header_offset, cur_pos, hpos; 00279 int bit_rate; 00280 int64_t duration; 00281 00282 tags[0] = av_metadata_get(s->metadata, "title" , NULL, 0); 00283 tags[1] = av_metadata_get(s->metadata, "author" , NULL, 0); 00284 tags[2] = av_metadata_get(s->metadata, "copyright", NULL, 0); 00285 tags[3] = av_metadata_get(s->metadata, "comment" , NULL, 0); 00286 tags[4] = av_metadata_get(s->metadata, "rating" , NULL, 0); 00287 00288 duration = asf->duration + PREROLL_TIME * 10000; 00289 has_title = tags[0] || tags[1] || tags[2] || tags[3] || tags[4]; 00290 metadata_count = s->metadata ? s->metadata->count : 0; 00291 00292 bit_rate = 0; 00293 for(n=0;n<s->nb_streams;n++) { 00294 enc = s->streams[n]->codec; 00295 00296 av_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */ 00297 00298 bit_rate += enc->bit_rate; 00299 } 00300 00301 if (asf->is_streamed) { 00302 put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */ 00303 } 00304 00305 put_guid(pb, &ff_asf_header); 00306 put_le64(pb, -1); /* header length, will be patched after */ 00307 put_le32(pb, 3 + has_title + !!metadata_count + s->nb_streams); /* number of chunks in header */ 00308 put_byte(pb, 1); /* ??? */ 00309 put_byte(pb, 2); /* ??? */ 00310 00311 /* file header */ 00312 header_offset = url_ftell(pb); 00313 hpos = put_header(pb, &ff_asf_file_header); 00314 put_guid(pb, &ff_asf_my_guid); 00315 put_le64(pb, file_size); 00316 file_time = 0; 00317 put_le64(pb, unix_to_file_time(file_time)); 00318 put_le64(pb, asf->nb_packets); /* number of packets */ 00319 put_le64(pb, duration); /* end time stamp (in 100ns units) */ 00320 put_le64(pb, asf->duration); /* duration (in 100ns units) */ 00321 put_le64(pb, PREROLL_TIME); /* start time stamp */ 00322 put_le32(pb, (asf->is_streamed || url_is_streamed(pb)) ? 3 : 2); /* ??? */ 00323 put_le32(pb, s->packet_size); /* packet size */ 00324 put_le32(pb, s->packet_size); /* packet size */ 00325 put_le32(pb, bit_rate); /* Nominal data rate in bps */ 00326 end_header(pb, hpos); 00327 00328 /* unknown headers */ 00329 hpos = put_header(pb, &ff_asf_head1_guid); 00330 put_guid(pb, &ff_asf_head2_guid); 00331 put_le32(pb, 6); 00332 put_le16(pb, 0); 00333 end_header(pb, hpos); 00334 00335 /* title and other infos */ 00336 if (has_title) { 00337 int len; 00338 uint8_t *buf; 00339 ByteIOContext *dyn_buf; 00340 00341 if (url_open_dyn_buf(&dyn_buf) < 0) 00342 return AVERROR(ENOMEM); 00343 00344 hpos = put_header(pb, &ff_asf_comment_header); 00345 00346 for (n = 0; n < FF_ARRAY_ELEMS(tags); n++) { 00347 len = tags[n] ? ff_put_str16_nolen(dyn_buf, tags[n]->value) : 0; 00348 put_le16(pb, len); 00349 } 00350 len = url_close_dyn_buf(dyn_buf, &buf); 00351 put_buffer(pb, buf, len); 00352 av_freep(&buf); 00353 end_header(pb, hpos); 00354 } 00355 if (metadata_count) { 00356 AVMetadataTag *tag = NULL; 00357 hpos = put_header(pb, &ff_asf_extended_content_header); 00358 put_le16(pb, metadata_count); 00359 while ((tag = av_metadata_get(s->metadata, "", tag, AV_METADATA_IGNORE_SUFFIX))) { 00360 put_str16(pb, tag->key); 00361 put_le16(pb, 0); 00362 put_str16(pb, tag->value); 00363 } 00364 end_header(pb, hpos); 00365 } 00366 00367 /* stream headers */ 00368 for(n=0;n<s->nb_streams;n++) { 00369 int64_t es_pos; 00370 // ASFStream *stream = &asf->streams[n]; 00371 00372 enc = s->streams[n]->codec; 00373 asf->streams[n].num = n + 1; 00374 asf->streams[n].seq = 0; 00375 00376 00377 switch(enc->codec_type) { 00378 case AVMEDIA_TYPE_AUDIO: 00379 wav_extra_size = 0; 00380 extra_size = 18 + wav_extra_size; 00381 extra_size2 = 8; 00382 break; 00383 default: 00384 case AVMEDIA_TYPE_VIDEO: 00385 wav_extra_size = enc->extradata_size; 00386 extra_size = 0x33 + wav_extra_size; 00387 extra_size2 = 0; 00388 break; 00389 } 00390 00391 hpos = put_header(pb, &ff_asf_stream_header); 00392 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) { 00393 put_guid(pb, &ff_asf_audio_stream); 00394 put_guid(pb, &ff_asf_audio_conceal_spread); 00395 } else { 00396 put_guid(pb, &ff_asf_video_stream); 00397 put_guid(pb, &ff_asf_video_conceal_none); 00398 } 00399 put_le64(pb, 0); /* ??? */ 00400 es_pos = url_ftell(pb); 00401 put_le32(pb, extra_size); /* wav header len */ 00402 put_le32(pb, extra_size2); /* additional data len */ 00403 put_le16(pb, n + 1); /* stream number */ 00404 put_le32(pb, 0); /* ??? */ 00405 00406 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) { 00407 /* WAVEFORMATEX header */ 00408 int wavsize = ff_put_wav_header(pb, enc); 00409 if ((enc->codec_id != CODEC_ID_MP3) && (enc->codec_id != CODEC_ID_MP2) && (enc->codec_id != CODEC_ID_ADPCM_IMA_WAV) && (enc->extradata_size==0)) { 00410 wavsize += 2; 00411 put_le16(pb, 0); 00412 } 00413 00414 if (wavsize < 0) 00415 return -1; 00416 if (wavsize != extra_size) { 00417 cur_pos = url_ftell(pb); 00418 url_fseek(pb, es_pos, SEEK_SET); 00419 put_le32(pb, wavsize); /* wav header len */ 00420 url_fseek(pb, cur_pos, SEEK_SET); 00421 } 00422 /* ERROR Correction */ 00423 put_byte(pb, 0x01); 00424 if(enc->codec_id == CODEC_ID_ADPCM_G726 || !enc->block_align){ 00425 put_le16(pb, 0x0190); 00426 put_le16(pb, 0x0190); 00427 }else{ 00428 put_le16(pb, enc->block_align); 00429 put_le16(pb, enc->block_align); 00430 } 00431 put_le16(pb, 0x01); 00432 put_byte(pb, 0x00); 00433 } else { 00434 put_le32(pb, enc->width); 00435 put_le32(pb, enc->height); 00436 put_byte(pb, 2); /* ??? */ 00437 put_le16(pb, 40 + enc->extradata_size); /* size */ 00438 00439 /* BITMAPINFOHEADER header */ 00440 ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 1); 00441 } 00442 end_header(pb, hpos); 00443 } 00444 00445 /* media comments */ 00446 00447 hpos = put_header(pb, &ff_asf_codec_comment_header); 00448 put_guid(pb, &ff_asf_codec_comment1_header); 00449 put_le32(pb, s->nb_streams); 00450 for(n=0;n<s->nb_streams;n++) { 00451 AVCodec *p; 00452 const char *desc; 00453 int len; 00454 uint8_t *buf; 00455 ByteIOContext *dyn_buf; 00456 00457 enc = s->streams[n]->codec; 00458 p = avcodec_find_encoder(enc->codec_id); 00459 00460 if(enc->codec_type == AVMEDIA_TYPE_AUDIO) 00461 put_le16(pb, 2); 00462 else if(enc->codec_type == AVMEDIA_TYPE_VIDEO) 00463 put_le16(pb, 1); 00464 else 00465 put_le16(pb, -1); 00466 00467 if(enc->codec_id == CODEC_ID_WMAV2) 00468 desc = "Windows Media Audio V8"; 00469 else 00470 desc = p ? p->name : enc->codec_name; 00471 00472 if ( url_open_dyn_buf(&dyn_buf) < 0) 00473 return AVERROR(ENOMEM); 00474 00475 ff_put_str16_nolen(dyn_buf, desc); 00476 len = url_close_dyn_buf(dyn_buf, &buf); 00477 put_le16(pb, len / 2); // "number of characters" = length in bytes / 2 00478 00479 put_buffer(pb, buf, len); 00480 av_freep(&buf); 00481 00482 put_le16(pb, 0); /* no parameters */ 00483 00484 00485 /* id */ 00486 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) { 00487 put_le16(pb, 2); 00488 put_le16(pb, enc->codec_tag); 00489 } else { 00490 put_le16(pb, 4); 00491 put_le32(pb, enc->codec_tag); 00492 } 00493 if(!enc->codec_tag) 00494 return -1; 00495 } 00496 end_header(pb, hpos); 00497 00498 /* patch the header size fields */ 00499 00500 cur_pos = url_ftell(pb); 00501 header_size = cur_pos - header_offset; 00502 if (asf->is_streamed) { 00503 header_size += 8 + 30 + 50; 00504 00505 url_fseek(pb, header_offset - 10 - 30, SEEK_SET); 00506 put_le16(pb, header_size); 00507 url_fseek(pb, header_offset - 2 - 30, SEEK_SET); 00508 put_le16(pb, header_size); 00509 00510 header_size -= 8 + 30 + 50; 00511 } 00512 header_size += 24 + 6; 00513 url_fseek(pb, header_offset - 14, SEEK_SET); 00514 put_le64(pb, header_size); 00515 url_fseek(pb, cur_pos, SEEK_SET); 00516 00517 /* movie chunk, followed by packets of packet_size */ 00518 asf->data_offset = cur_pos; 00519 put_guid(pb, &ff_asf_data_header); 00520 put_le64(pb, data_chunk_size); 00521 put_guid(pb, &ff_asf_my_guid); 00522 put_le64(pb, asf->nb_packets); /* nb packets */ 00523 put_byte(pb, 1); /* ??? */ 00524 put_byte(pb, 1); /* ??? */ 00525 return 0; 00526 } 00527 00528 static int asf_write_header(AVFormatContext *s) 00529 { 00530 ASFContext *asf = s->priv_data; 00531 00532 s->packet_size = PACKET_SIZE; 00533 asf->nb_packets = 0; 00534 00535 asf->last_indexed_pts = 0; 00536 asf->index_ptr = av_malloc( sizeof(ASFIndex) * ASF_INDEX_BLOCK ); 00537 asf->nb_index_memory_alloc = ASF_INDEX_BLOCK; 00538 asf->nb_index_count = 0; 00539 asf->maximum_packet = 0; 00540 00541 /* the data-chunk-size has to be 50, which is data_size - asf->data_offset 00542 * at the moment this function is done. It is needed to use asf as 00543 * streamable format. */ 00544 if (asf_write_header1(s, 0, 50) < 0) { 00545 //av_free(asf); 00546 return -1; 00547 } 00548 00549 put_flush_packet(s->pb); 00550 00551 asf->packet_nb_payloads = 0; 00552 asf->packet_timestamp_start = -1; 00553 asf->packet_timestamp_end = -1; 00554 init_put_byte(&asf->pb, asf->packet_buf, s->packet_size, 1, 00555 NULL, NULL, NULL, NULL); 00556 00557 return 0; 00558 } 00559 00560 static int asf_write_stream_header(AVFormatContext *s) 00561 { 00562 ASFContext *asf = s->priv_data; 00563 00564 asf->is_streamed = 1; 00565 00566 return asf_write_header(s); 00567 } 00568 00569 static int put_payload_parsing_info( 00570 AVFormatContext *s, 00571 unsigned int sendtime, 00572 unsigned int duration, 00573 int nb_payloads, 00574 int padsize 00575 ) 00576 { 00577 ASFContext *asf = s->priv_data; 00578 ByteIOContext *pb = s->pb; 00579 int ppi_size, i; 00580 int64_t start= url_ftell(pb); 00581 00582 int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS; 00583 00584 padsize -= PACKET_HEADER_MIN_SIZE; 00585 if(asf->multi_payloads_present) 00586 padsize--; 00587 assert(padsize>=0); 00588 00589 put_byte(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS); 00590 for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++){ 00591 put_byte(pb, 0x0); 00592 } 00593 00594 if (asf->multi_payloads_present) 00595 iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT; 00596 00597 if (padsize > 0) { 00598 if (padsize < 256) 00599 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE; 00600 else 00601 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD; 00602 } 00603 put_byte(pb, iLengthTypeFlags); 00604 00605 put_byte(pb, ASF_PPI_PROPERTY_FLAGS); 00606 00607 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD) 00608 put_le16(pb, padsize - 2); 00609 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE) 00610 put_byte(pb, padsize - 1); 00611 00612 put_le32(pb, sendtime); 00613 put_le16(pb, duration); 00614 if (asf->multi_payloads_present) 00615 put_byte(pb, nb_payloads | ASF_PAYLOAD_FLAGS); 00616 00617 ppi_size = url_ftell(pb) - start; 00618 00619 return ppi_size; 00620 } 00621 00622 static void flush_packet(AVFormatContext *s) 00623 { 00624 ASFContext *asf = s->priv_data; 00625 int packet_hdr_size, packet_filled_size; 00626 00627 assert(asf->packet_timestamp_end >= asf->packet_timestamp_start); 00628 00629 if (asf->is_streamed) { 00630 put_chunk(s, 0x4424, s->packet_size, 0); 00631 } 00632 00633 packet_hdr_size = put_payload_parsing_info( 00634 s, 00635 asf->packet_timestamp_start, 00636 asf->packet_timestamp_end - asf->packet_timestamp_start, 00637 asf->packet_nb_payloads, 00638 asf->packet_size_left 00639 ); 00640 00641 packet_filled_size = PACKET_SIZE - asf->packet_size_left; 00642 assert(packet_hdr_size <= asf->packet_size_left); 00643 memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left); 00644 00645 put_buffer(s->pb, asf->packet_buf, s->packet_size - packet_hdr_size); 00646 00647 put_flush_packet(s->pb); 00648 asf->nb_packets++; 00649 asf->packet_nb_payloads = 0; 00650 asf->packet_timestamp_start = -1; 00651 asf->packet_timestamp_end = -1; 00652 init_put_byte(&asf->pb, asf->packet_buf, s->packet_size, 1, 00653 NULL, NULL, NULL, NULL); 00654 } 00655 00656 static void put_payload_header( 00657 AVFormatContext *s, 00658 ASFStream *stream, 00659 int presentation_time, 00660 int m_obj_size, 00661 int m_obj_offset, 00662 int payload_len, 00663 int flags 00664 ) 00665 { 00666 ASFContext *asf = s->priv_data; 00667 ByteIOContext *pb = &asf->pb; 00668 int val; 00669 00670 val = stream->num; 00671 if (flags & AV_PKT_FLAG_KEY) 00672 val |= ASF_PL_FLAG_KEY_FRAME; 00673 put_byte(pb, val); 00674 00675 put_byte(pb, stream->seq); //Media object number 00676 put_le32(pb, m_obj_offset); //Offset Into Media Object 00677 00678 // Replicated Data shall be at least 8 bytes long. 00679 // The first 4 bytes of data shall contain the 00680 // Size of the Media Object that the payload belongs to. 00681 // The next 4 bytes of data shall contain the 00682 // Presentation Time for the media object that the payload belongs to. 00683 put_byte(pb, ASF_PAYLOAD_REPLICATED_DATA_LENGTH); 00684 00685 put_le32(pb, m_obj_size); //Replicated Data - Media Object Size 00686 put_le32(pb, presentation_time);//Replicated Data - Presentation Time 00687 00688 if (asf->multi_payloads_present){ 00689 put_le16(pb, payload_len); //payload length 00690 } 00691 } 00692 00693 static void put_frame( 00694 AVFormatContext *s, 00695 ASFStream *stream, 00696 AVStream *avst, 00697 int timestamp, 00698 const uint8_t *buf, 00699 int m_obj_size, 00700 int flags 00701 ) 00702 { 00703 ASFContext *asf = s->priv_data; 00704 int m_obj_offset, payload_len, frag_len1; 00705 00706 m_obj_offset = 0; 00707 while (m_obj_offset < m_obj_size) { 00708 payload_len = m_obj_size - m_obj_offset; 00709 if (asf->packet_timestamp_start == -1) { 00710 asf->multi_payloads_present = (payload_len < MULTI_PAYLOAD_CONSTANT); 00711 00712 asf->packet_size_left = PACKET_SIZE; 00713 if (asf->multi_payloads_present){ 00714 frag_len1 = MULTI_PAYLOAD_CONSTANT - 1; 00715 } 00716 else { 00717 frag_len1 = SINGLE_PAYLOAD_DATA_LENGTH; 00718 } 00719 asf->packet_timestamp_start = timestamp; 00720 } 00721 else { 00722 // multi payloads 00723 frag_len1 = asf->packet_size_left - PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS - PACKET_HEADER_MIN_SIZE - 1; 00724 00725 if(frag_len1 < payload_len && avst->codec->codec_type == AVMEDIA_TYPE_AUDIO){ 00726 flush_packet(s); 00727 continue; 00728 } 00729 } 00730 if (frag_len1 > 0) { 00731 if (payload_len > frag_len1) 00732 payload_len = frag_len1; 00733 else if (payload_len == (frag_len1 - 1)) 00734 payload_len = frag_len1 - 2; //additional byte need to put padding length 00735 00736 put_payload_header(s, stream, timestamp+PREROLL_TIME, m_obj_size, m_obj_offset, payload_len, flags); 00737 put_buffer(&asf->pb, buf, payload_len); 00738 00739 if (asf->multi_payloads_present) 00740 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS); 00741 else 00742 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD); 00743 asf->packet_timestamp_end = timestamp; 00744 00745 asf->packet_nb_payloads++; 00746 } else { 00747 payload_len = 0; 00748 } 00749 m_obj_offset += payload_len; 00750 buf += payload_len; 00751 00752 if (!asf->multi_payloads_present) 00753 flush_packet(s); 00754 else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + PACKET_HEADER_MIN_SIZE + 1)) 00755 flush_packet(s); 00756 } 00757 stream->seq++; 00758 } 00759 00760 static int asf_write_packet(AVFormatContext *s, AVPacket *pkt) 00761 { 00762 ASFContext *asf = s->priv_data; 00763 ASFStream *stream; 00764 int64_t duration; 00765 AVCodecContext *codec; 00766 int64_t packet_st,pts; 00767 int start_sec,i; 00768 int flags= pkt->flags; 00769 00770 codec = s->streams[pkt->stream_index]->codec; 00771 stream = &asf->streams[pkt->stream_index]; 00772 00773 if(codec->codec_type == AVMEDIA_TYPE_AUDIO) 00774 flags &= ~AV_PKT_FLAG_KEY; 00775 00776 pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts; 00777 assert(pts != AV_NOPTS_VALUE); 00778 duration = pts * 10000; 00779 asf->duration= FFMAX(asf->duration, duration + pkt->duration * 10000); 00780 00781 packet_st = asf->nb_packets; 00782 put_frame(s, stream, s->streams[pkt->stream_index], pkt->dts, pkt->data, pkt->size, flags); 00783 00784 /* check index */ 00785 if ((!asf->is_streamed) && (flags & AV_PKT_FLAG_KEY)) { 00786 start_sec = (int)(duration / INT64_C(10000000)); 00787 if (start_sec != (int)(asf->last_indexed_pts / INT64_C(10000000))) { 00788 for(i=asf->nb_index_count;i<start_sec;i++) { 00789 if (i>=asf->nb_index_memory_alloc) { 00790 asf->nb_index_memory_alloc += ASF_INDEX_BLOCK; 00791 asf->index_ptr = (ASFIndex*)av_realloc( asf->index_ptr, sizeof(ASFIndex) * asf->nb_index_memory_alloc ); 00792 } 00793 // store 00794 asf->index_ptr[i].packet_number = (uint32_t)packet_st; 00795 asf->index_ptr[i].packet_count = (uint16_t)(asf->nb_packets-packet_st); 00796 asf->maximum_packet = FFMAX(asf->maximum_packet, (uint16_t)(asf->nb_packets-packet_st)); 00797 } 00798 asf->nb_index_count = start_sec; 00799 asf->last_indexed_pts = duration; 00800 } 00801 } 00802 return 0; 00803 } 00804 00805 // 00806 static int asf_write_index(AVFormatContext *s, ASFIndex *index, uint16_t max, uint32_t count) 00807 { 00808 ByteIOContext *pb = s->pb; 00809 int i; 00810 00811 put_guid(pb, &ff_asf_simple_index_header); 00812 put_le64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2)*count); 00813 put_guid(pb, &ff_asf_my_guid); 00814 put_le64(pb, ASF_INDEXED_INTERVAL); 00815 put_le32(pb, max); 00816 put_le32(pb, count); 00817 for(i=0; i<count; i++) { 00818 put_le32(pb, index[i].packet_number); 00819 put_le16(pb, index[i].packet_count); 00820 } 00821 00822 return 0; 00823 } 00824 00825 static int asf_write_trailer(AVFormatContext *s) 00826 { 00827 ASFContext *asf = s->priv_data; 00828 int64_t file_size,data_size; 00829 00830 /* flush the current packet */ 00831 if (asf->pb.buf_ptr > asf->pb.buffer) 00832 flush_packet(s); 00833 00834 /* write index */ 00835 data_size = url_ftell(s->pb); 00836 if ((!asf->is_streamed) && (asf->nb_index_count != 0)) { 00837 asf_write_index(s, asf->index_ptr, asf->maximum_packet, asf->nb_index_count); 00838 } 00839 put_flush_packet(s->pb); 00840 00841 if (asf->is_streamed || url_is_streamed(s->pb)) { 00842 put_chunk(s, 0x4524, 0, 0); /* end of stream */ 00843 } else { 00844 /* rewrite an updated header */ 00845 file_size = url_ftell(s->pb); 00846 url_fseek(s->pb, 0, SEEK_SET); 00847 asf_write_header1(s, file_size, data_size - asf->data_offset); 00848 } 00849 00850 put_flush_packet(s->pb); 00851 av_free(asf->index_ptr); 00852 return 0; 00853 } 00854 00855 #if CONFIG_ASF_MUXER 00856 AVOutputFormat asf_muxer = { 00857 "asf", 00858 NULL_IF_CONFIG_SMALL("ASF format"), 00859 "video/x-ms-asf", 00860 "asf,wmv,wma", 00861 sizeof(ASFContext), 00862 #if CONFIG_LIBMP3LAME 00863 CODEC_ID_MP3, 00864 #else 00865 CODEC_ID_MP2, 00866 #endif 00867 CODEC_ID_MSMPEG4V3, 00868 asf_write_header, 00869 asf_write_packet, 00870 asf_write_trailer, 00871 .flags = AVFMT_GLOBALHEADER, 00872 .codec_tag= (const AVCodecTag* const []){codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0}, 00873 .metadata_conv = ff_asf_metadata_conv, 00874 }; 00875 #endif 00876 00877 #if CONFIG_ASF_STREAM_MUXER 00878 AVOutputFormat asf_stream_muxer = { 00879 "asf_stream", 00880 NULL_IF_CONFIG_SMALL("ASF format"), 00881 "video/x-ms-asf", 00882 "asf,wmv,wma", 00883 sizeof(ASFContext), 00884 #if CONFIG_LIBMP3LAME 00885 CODEC_ID_MP3, 00886 #else 00887 CODEC_ID_MP2, 00888 #endif 00889 CODEC_ID_MSMPEG4V3, 00890 asf_write_stream_header, 00891 asf_write_packet, 00892 asf_write_trailer, 00893 .flags = AVFMT_GLOBALHEADER, 00894 .codec_tag= (const AVCodecTag* const []){codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0}, 00895 .metadata_conv = ff_asf_metadata_conv, 00896 }; 00897 #endif //CONFIG_ASF_STREAM_MUXER