libavformat/asfenc.c

   1 /*
   2  * ASF muxer
   3  * Copyright (c) 2000, 2001 Fabrice Bellard
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21 #include "avformat.h"
  22 #include "metadata.h"
  23 #include "riff.h"
  24 #include "asf.h"
  25
  26 #undef NDEBUG
  27 #include <assert.h>
  28
  29
  30 #define ASF_INDEXED_INTERVAL    10000000
  31 #define ASF_INDEX_BLOCK         600
  32
  33 #define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
  34 #define ASF_PACKET_ERROR_CORRECTION_FLAGS (\
  35                 ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT | \
  36                 ASF_PACKET_ERROR_CORRECTION_DATA_SIZE\
  37                 )
  38
  39 #if (ASF_PACKET_ERROR_CORRECTION_FLAGS != 0)
  40 #   define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 1
  41 #else
  42 #   define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 0
  43 #endif
  44
  45 #define ASF_PPI_PROPERTY_FLAGS (\
  46                 ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE | \
  47                 ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD | \
  48                 ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE | \
  49                 ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE \
  50                 )
  51
  52 #define ASF_PPI_LENGTH_TYPE_FLAGS 0
  53
  54 #define ASF_PAYLOAD_FLAGS ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD
  55
  56 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
  57 #   define ASF_PPI_SEQUENCE_FIELD_SIZE 1
  58 #endif
  59 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
  60 #   define ASF_PPI_SEQUENCE_FIELD_SIZE 2
  61 #endif
  62 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
  63 #   define ASF_PPI_SEQUENCE_FIELD_SIZE 4
  64 #endif
  65 #ifndef ASF_PPI_SEQUENCE_FIELD_SIZE
  66 #   define ASF_PPI_SEQUENCE_FIELD_SIZE 0
  67 #endif
  68
  69
  70 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
  71 #   define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 1
  72 #endif
  73 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
  74 #   define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 2
  75 #endif
  76 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
  77 #   define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 4
  78 #endif
  79 #ifndef ASF_PPI_PACKET_LENGTH_FIELD_SIZE
  80 #   define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 0
  81 #endif
  82
  83 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
  84 #   define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 1
  85 #endif
  86 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
  87 #   define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 2
  88 #endif
  89 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
  90 #   define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 4
  91 #endif
  92 #ifndef ASF_PPI_PADDING_LENGTH_FIELD_SIZE
  93 #   define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 0
  94 #endif
  95
  96 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
  97 #   define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 1
  98 #endif
  99 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
 100 #   define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 2
 101 #endif
 102 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
 103 #   define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 4
 104 #endif
 105 #ifndef ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE
 106 #   define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 0
 107 #endif
 108
 109 #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))
 110 #   define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 1
 111 #endif
 112 #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))
 113 #   define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 2
 114 #endif
 115 #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))
 116 #   define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 4
 117 #endif
 118 #ifndef ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE
 119 #   define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 0
 120 #endif
 121
 122 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
 123 #   define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 1
 124 #endif
 125 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
 126 #   define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 2
 127 #endif
 128 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
 129 #   define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 4
 130 #endif
 131 #ifndef ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE
 132 #   define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 0
 133 #endif
 134
 135 #if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
 136 #   define ASF_PAYLOAD_LENGTH_FIELD_SIZE 1
 137 #endif
 138 #if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
 139 #   define ASF_PAYLOAD_LENGTH_FIELD_SIZE 2
 140 #endif
 141 #ifndef ASF_PAYLOAD_LENGTH_FIELD_SIZE
 142 #   define ASF_PAYLOAD_LENGTH_FIELD_SIZE 0
 143 #endif
 144
 145 #define PACKET_HEADER_MIN_SIZE (\
 146                 ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE + \
 147                 ASF_PACKET_ERROR_CORRECTION_DATA_SIZE + \
 148                 1 + /*Length Type Flags*/ \
 149                 1 + /*Property Flags*/ \
 150                 ASF_PPI_PACKET_LENGTH_FIELD_SIZE + \
 151                 ASF_PPI_SEQUENCE_FIELD_SIZE + \
 152                 ASF_PPI_PADDING_LENGTH_FIELD_SIZE + \
 153                 4 + /*Send Time Field*/ \
 154                 2   /*Duration Field*/ \
 155                 )
 156
 157
 158 // Replicated Data shall be at least 8 bytes long.
 159 #define ASF_PAYLOAD_REPLICATED_DATA_LENGTH 0x08
 160
 161 #define PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD (\
 162                 1 + /*Stream Number*/ \
 163                 ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
 164                 ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
 165                 ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
 166                 ASF_PAYLOAD_REPLICATED_DATA_LENGTH \
 167                 )
 168
 169 #define PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS (\
 170                 1 + /*Stream Number*/ \
 171                 ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
 172                 ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
 173                 ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
 174                 ASF_PAYLOAD_REPLICATED_DATA_LENGTH + \
 175                 ASF_PAYLOAD_LENGTH_FIELD_SIZE \
 176                 )
 177
 178 #define SINGLE_PAYLOAD_DATA_LENGTH (\
 179                 PACKET_SIZE - \
 180                 PACKET_HEADER_MIN_SIZE - \
 181                 PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD \
 182                 )
 183
 184 #define MULTI_PAYLOAD_CONSTANT (\
 185                 PACKET_SIZE - \
 186                 PACKET_HEADER_MIN_SIZE - \
 187                 1 - /*Payload Flags*/ \
 188                 2*PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS \
 189                 )
 190
 191 static const AVCodecTag codec_asf_bmp_tags[] = {
 192     { CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
 193     { CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
 194     { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
 195     { CODEC_ID_NONE, 0 },
 196 };
 197
 198 #define PREROLL_TIME 3100
 199
 200 static void put_guid(ByteIOContext *s, const ff_asf_guid *g)
 201 {
 202     assert(sizeof(*g) == 16);
 203     put_buffer(s, *g, sizeof(*g));
 204 }
 205
 206 static void put_str16_nolen(ByteIOContext *s, const char *tag);
 207 static void put_str16(ByteIOContext *s, const char *tag)
 208 {
 209     put_le16(s,strlen(tag) + 1);
 210     put_str16_nolen(s, tag);
 211 }
 212
 213 static void put_str16_nolen(ByteIOContext *s, const char *tag)
 214 {
 215     int c;
 216
 217     do{
 218         c = (uint8_t)*tag++;
 219         put_le16(s, c);
 220     }while(c);
 221 }
 222
 223 static int64_t put_header(ByteIOContext *pb, const ff_asf_guid *g)
 224 {
 225     int64_t pos;
 226
 227     pos = url_ftell(pb);
 228     put_guid(pb, g);
 229     put_le64(pb, 24);
 230     return pos;
 231 }
 232
 233 /* update header size */
 234 static void end_header(ByteIOContext *pb, int64_t pos)
 235 {
 236     int64_t pos1;
 237
 238     pos1 = url_ftell(pb);
 239     url_fseek(pb, pos + 16, SEEK_SET);
 240     put_le64(pb, pos1 - pos);
 241     url_fseek(pb, pos1, SEEK_SET);
 242 }
 243
 244 /* write an asf chunk (only used in streaming case) */
 245 static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
 246 {
 247     ASFContext *asf = s->priv_data;
 248     ByteIOContext *pb = s->pb;
 249     int length;
 250
 251     length = payload_length + 8;
 252     put_le16(pb, type);
 253     put_le16(pb, length);    //size
 254     put_le32(pb, asf->seqno);//sequence number
 255     put_le16(pb, flags); /* unknown bytes */
 256     put_le16(pb, length);    //size_confirm
 257     asf->seqno++;
 258 }
 259
 260 /* convert from unix to windows time */
 261 static int64_t unix_to_file_time(int ti)
 262 {
 263     int64_t t;
 264
 265     t = ti * INT64_C(10000000);
 266     t += INT64_C(116444736000000000);
 267     return t;
 268 }
 269
 270 /* write the header (used two times if non streamed) */
 271 static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size)
 272 {
 273     ASFContext *asf = s->priv_data;
 274     ByteIOContext *pb = s->pb;
 275     AVMetadataTag *title, *author, *copyright, *comment;
 276     int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
 277     int has_title;
 278     int metadata_count;
 279     AVCodecContext *enc;
 280     int64_t header_offset, cur_pos, hpos;
 281     int bit_rate;
 282     int64_t duration;
 283
 284     title     = av_metadata_get(s->metadata, "title"    , NULL, 0);
 285     author    = av_metadata_get(s->metadata, "author"   , NULL, 0);
 286     copyright = av_metadata_get(s->metadata, "copyright", NULL, 0);
 287     comment   = av_metadata_get(s->metadata, "comment"  , NULL, 0);
 288
 289     duration = asf->duration + PREROLL_TIME * 10000;
 290     has_title = title || author || copyright || comment;
 291     metadata_count = s->metadata ? s->metadata->count : 0;
 292
 293     bit_rate = 0;
 294     for(n=0;n<s->nb_streams;n++) {
 295         enc = s->streams[n]->codec;
 296
 297         av_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */
 298
 299         bit_rate += enc->bit_rate;
 300     }
 301
 302     if (asf->is_streamed) {
 303         put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
 304     }
 305
 306     put_guid(pb, &ff_asf_header);
 307     put_le64(pb, -1); /* header length, will be patched after */
 308     put_le32(pb, 3 + has_title + !!metadata_count + s->nb_streams); /* number of chunks in header */
 309     put_byte(pb, 1); /* ??? */
 310     put_byte(pb, 2); /* ??? */
 311
 312     /* file header */
 313     header_offset = url_ftell(pb);
 314     hpos = put_header(pb, &ff_asf_file_header);
 315     put_guid(pb, &ff_asf_my_guid);
 316     put_le64(pb, file_size);
 317     file_time = 0;
 318     put_le64(pb, unix_to_file_time(file_time));
 319     put_le64(pb, asf->nb_packets); /* number of packets */
 320     put_le64(pb, duration); /* end time stamp (in 100ns units) */
 321     put_le64(pb, asf->duration); /* duration (in 100ns units) */
 322     put_le64(pb, PREROLL_TIME); /* start time stamp */
 323     put_le32(pb, (asf->is_streamed || url_is_streamed(pb)) ? 3 : 2); /* ??? */
 324     put_le32(pb, asf->packet_size); /* packet size */
 325     put_le32(pb, asf->packet_size); /* packet size */
 326     put_le32(pb, bit_rate); /* Nominal data rate in bps */
 327     end_header(pb, hpos);
 328
 329     /* unknown headers */
 330     hpos = put_header(pb, &ff_asf_head1_guid);
 331     put_guid(pb, &ff_asf_head2_guid);
 332     put_le32(pb, 6);
 333     put_le16(pb, 0);
 334     end_header(pb, hpos);
 335
 336     /* title and other infos */
 337     if (has_title) {
 338         hpos = put_header(pb, &ff_asf_comment_header);
 339         put_le16(pb, title     ? 2 * (strlen(title->value    ) + 1) : 0);
 340         put_le16(pb, author    ? 2 * (strlen(author->value   ) + 1) : 0);
 341         put_le16(pb, copyright ? 2 * (strlen(copyright->value) + 1) : 0);
 342         put_le16(pb, comment   ? 2 * (strlen(comment->value  ) + 1) : 0);
 343         put_le16(pb, 0);
 344         if (title    ) put_str16_nolen(pb, title->value    );
 345         if (author   ) put_str16_nolen(pb, author->value   );
 346         if (copyright) put_str16_nolen(pb, copyright->value);
 347         if (comment  ) put_str16_nolen(pb, comment->value  );
 348         end_header(pb, hpos);
 349     }
 350     if (metadata_count) {
 351         AVMetadataTag *tag = NULL;
 352         hpos = put_header(pb, &ff_asf_extended_content_header);
 353         put_le16(pb, metadata_count);
 354         while ((tag = av_metadata_get(s->metadata, "", tag, AV_METADATA_IGNORE_SUFFIX))) {
 355             put_le16(pb, 2*(strlen(tag->key) + 3) + 1);
 356             put_le16(pb, 'W');
 357             put_le16(pb, 'M');
 358             put_le16(pb, '/');
 359             put_str16_nolen(pb, tag->key);
 360             put_le16(pb, 0);
 361             put_le16(pb, 2*strlen(tag->value) + 1);
 362             put_str16_nolen(pb, tag->value);
 363         }
 364         end_header(pb, hpos);
 365     }
 366
 367     /* stream headers */
 368     for(n=0;n<s->nb_streams;n++) {
 369         int64_t es_pos;
 370         //        ASFStream *stream = &asf->streams[n];
 371
 372         enc = s->streams[n]->codec;
 373         asf->streams[n].num = n + 1;
 374         asf->streams[n].seq = 0;
 375
 376
 377         switch(enc->codec_type) {
 378         case CODEC_TYPE_AUDIO:
 379             wav_extra_size = 0;
 380             extra_size = 18 + wav_extra_size;
 381             extra_size2 = 8;
 382             break;
 383         default:
 384         case CODEC_TYPE_VIDEO:
 385             wav_extra_size = enc->extradata_size;
 386             extra_size = 0x33 + wav_extra_size;
 387             extra_size2 = 0;
 388             break;
 389         }
 390
 391         hpos = put_header(pb, &ff_asf_stream_header);
 392         if (enc->codec_type == CODEC_TYPE_AUDIO) {
 393             put_guid(pb, &ff_asf_audio_stream);
 394             put_guid(pb, &ff_asf_audio_conceal_spread);
 395         } else {
 396             put_guid(pb, &ff_asf_video_stream);
 397             put_guid(pb, &ff_asf_video_conceal_none);
 398         }
 399         put_le64(pb, 0); /* ??? */
 400         es_pos = url_ftell(pb);
 401         put_le32(pb, extra_size); /* wav header len */
 402         put_le32(pb, extra_size2); /* additional data len */
 403         put_le16(pb, n + 1); /* stream number */
 404         put_le32(pb, 0); /* ??? */
 405
 406         if (enc->codec_type == CODEC_TYPE_AUDIO) {
 407             /* WAVEFORMATEX header */
 408             int wavsize = put_wav_header(pb, enc);
 409             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)) {
 410                 wavsize += 2;
 411                 put_le16(pb, 0);
 412             }
 413
 414             if (wavsize < 0)
 415                 return -1;
 416             if (wavsize != extra_size) {
 417                 cur_pos = url_ftell(pb);
 418                 url_fseek(pb, es_pos, SEEK_SET);
 419                 put_le32(pb, wavsize); /* wav header len */
 420                 url_fseek(pb, cur_pos, SEEK_SET);
 421             }
 422             /* ERROR Correction */
 423             put_byte(pb, 0x01);
 424             if(enc->codec_id == CODEC_ID_ADPCM_G726 || !enc->block_align){
 425                 put_le16(pb, 0x0190);
 426                 put_le16(pb, 0x0190);
 427             }else{
 428                 put_le16(pb, enc->block_align);
 429                 put_le16(pb, enc->block_align);
 430             }
 431             put_le16(pb, 0x01);
 432             put_byte(pb, 0x00);
 433         } else {
 434             put_le32(pb, enc->width);
 435             put_le32(pb, enc->height);
 436             put_byte(pb, 2); /* ??? */
 437             put_le16(pb, 40 + enc->extradata_size); /* size */
 438
 439             /* BITMAPINFOHEADER header */
 440             put_bmp_header(pb, enc, codec_bmp_tags, 1);
 441         }
 442         end_header(pb, hpos);
 443     }
 444
 445     /* media comments */
 446
 447     hpos = put_header(pb, &ff_asf_codec_comment_header);
 448     put_guid(pb, &ff_asf_codec_comment1_header);
 449     put_le32(pb, s->nb_streams);
 450     for(n=0;n<s->nb_streams;n++) {
 451         AVCodec *p;
 452
 453         enc = s->streams[n]->codec;
 454         p = avcodec_find_encoder(enc->codec_id);
 455
 456         if(enc->codec_type == CODEC_TYPE_AUDIO)
 457             put_le16(pb, 2);
 458         else if(enc->codec_type == CODEC_TYPE_VIDEO)
 459             put_le16(pb, 1);
 460         else
 461             put_le16(pb, -1);
 462
 463         if(enc->codec_id == CODEC_ID_WMAV2)
 464             put_str16(pb, "Windows Media Audio V8");
 465         else
 466             put_str16(pb, p ? p->name : enc->codec_name);
 467         put_le16(pb, 0); /* no parameters */
 468
 469
 470         /* id */
 471         if (enc->codec_type == CODEC_TYPE_AUDIO) {
 472             put_le16(pb, 2);
 473             put_le16(pb, enc->codec_tag);
 474         } else {
 475             put_le16(pb, 4);
 476             put_le32(pb, enc->codec_tag);
 477         }
 478         if(!enc->codec_tag)
 479             return -1;
 480     }
 481     end_header(pb, hpos);
 482
 483     /* patch the header size fields */
 484
 485     cur_pos = url_ftell(pb);
 486     header_size = cur_pos - header_offset;
 487     if (asf->is_streamed) {
 488         header_size += 8 + 30 + 50;
 489
 490         url_fseek(pb, header_offset - 10 - 30, SEEK_SET);
 491         put_le16(pb, header_size);
 492         url_fseek(pb, header_offset - 2 - 30, SEEK_SET);
 493         put_le16(pb, header_size);
 494
 495         header_size -= 8 + 30 + 50;
 496     }
 497     header_size += 24 + 6;
 498     url_fseek(pb, header_offset - 14, SEEK_SET);
 499     put_le64(pb, header_size);
 500     url_fseek(pb, cur_pos, SEEK_SET);
 501
 502     /* movie chunk, followed by packets of packet_size */
 503     asf->data_offset = cur_pos;
 504     put_guid(pb, &ff_asf_data_header);
 505     put_le64(pb, data_chunk_size);
 506     put_guid(pb, &ff_asf_my_guid);
 507     put_le64(pb, asf->nb_packets); /* nb packets */
 508     put_byte(pb, 1); /* ??? */
 509     put_byte(pb, 1); /* ??? */
 510     return 0;
 511 }
 512
 513 static int asf_write_header(AVFormatContext *s)
 514 {
 515     ASFContext *asf = s->priv_data;
 516
 517     asf->packet_size = PACKET_SIZE;
 518     asf->nb_packets = 0;
 519
 520     asf->last_indexed_pts = 0;
 521     asf->index_ptr = av_malloc( sizeof(ASFIndex) * ASF_INDEX_BLOCK );
 522     asf->nb_index_memory_alloc = ASF_INDEX_BLOCK;
 523     asf->nb_index_count = 0;
 524     asf->maximum_packet = 0;
 525
 526     /* the data-chunk-size has to be 50, which is data_size - asf->data_offset
 527      *  at the moment this function is done. It is needed to use asf as
 528      *  streamable format. */
 529     if (asf_write_header1(s, 0, 50) < 0) {
 530         //av_free(asf);
 531         return -1;
 532     }
 533
 534     put_flush_packet(s->pb);
 535
 536     asf->packet_nb_payloads = 0;
 537     asf->packet_timestamp_start = -1;
 538     asf->packet_timestamp_end = -1;
 539     init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
 540                   NULL, NULL, NULL, NULL);
 541
 542     return 0;
 543 }
 544
 545 static int asf_write_stream_header(AVFormatContext *s)
 546 {
 547     ASFContext *asf = s->priv_data;
 548
 549     asf->is_streamed = 1;
 550
 551     return asf_write_header(s);
 552 }
 553
 554 static int put_payload_parsing_info(
 555                                 AVFormatContext *s,
 556                                 unsigned int    sendtime,
 557                                 unsigned int    duration,
 558                                 int             nb_payloads,
 559                                 int             padsize
 560             )
 561 {
 562     ASFContext *asf = s->priv_data;
 563     ByteIOContext *pb = s->pb;
 564     int ppi_size, i;
 565     int64_t start= url_ftell(pb);
 566
 567     int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS;
 568
 569     padsize -= PACKET_HEADER_MIN_SIZE;
 570     if(asf->multi_payloads_present)
 571         padsize--;
 572     assert(padsize>=0);
 573
 574     put_byte(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS);
 575     for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++){
 576         put_byte(pb, 0x0);
 577     }
 578
 579     if (asf->multi_payloads_present)
 580         iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT;
 581
 582     if (padsize > 0) {
 583         if (padsize < 256)
 584             iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE;
 585         else
 586             iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD;
 587     }
 588     put_byte(pb, iLengthTypeFlags);
 589
 590     put_byte(pb, ASF_PPI_PROPERTY_FLAGS);
 591
 592     if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD)
 593         put_le16(pb, padsize - 2);
 594     if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE)
 595         put_byte(pb, padsize - 1);
 596
 597     put_le32(pb, sendtime);
 598     put_le16(pb, duration);
 599     if (asf->multi_payloads_present)
 600         put_byte(pb, nb_payloads | ASF_PAYLOAD_FLAGS);
 601
 602     ppi_size = url_ftell(pb) - start;
 603
 604     return ppi_size;
 605 }
 606
 607 static void flush_packet(AVFormatContext *s)
 608 {
 609     ASFContext *asf = s->priv_data;
 610     int packet_hdr_size, packet_filled_size;
 611
 612     assert(asf->packet_timestamp_end >= asf->packet_timestamp_start);
 613
 614     if (asf->is_streamed) {
 615         put_chunk(s, 0x4424, asf->packet_size, 0);
 616     }
 617
 618     packet_hdr_size = put_payload_parsing_info(
 619                             s,
 620                             asf->packet_timestamp_start,
 621                             asf->packet_timestamp_end - asf->packet_timestamp_start,
 622                             asf->packet_nb_payloads,
 623                             asf->packet_size_left
 624                         );
 625
 626     packet_filled_size = PACKET_SIZE - asf->packet_size_left;
 627     assert(packet_hdr_size <= asf->packet_size_left);
 628     memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left);
 629
 630     put_buffer(s->pb, asf->packet_buf, asf->packet_size - packet_hdr_size);
 631
 632     put_flush_packet(s->pb);
 633     asf->nb_packets++;
 634     asf->packet_nb_payloads = 0;
 635     asf->packet_timestamp_start = -1;
 636     asf->packet_timestamp_end = -1;
 637     init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
 638                   NULL, NULL, NULL, NULL);
 639 }
 640
 641 static void put_payload_header(
 642                                 AVFormatContext *s,
 643                                 ASFStream       *stream,
 644                                 int             presentation_time,
 645                                 int             m_obj_size,
 646                                 int             m_obj_offset,
 647                                 int             payload_len,
 648                                 int             flags
 649             )
 650 {
 651     ASFContext *asf = s->priv_data;
 652     ByteIOContext *pb = &asf->pb;
 653     int val;
 654
 655     val = stream->num;
 656     if (flags & PKT_FLAG_KEY)
 657         val |= ASF_PL_FLAG_KEY_FRAME;
 658     put_byte(pb, val);
 659
 660     put_byte(pb, stream->seq);  //Media object number
 661     put_le32(pb, m_obj_offset); //Offset Into Media Object
 662
 663     // Replicated Data shall be at least 8 bytes long.
 664     // The first 4 bytes of data shall contain the
 665     // Size of the Media Object that the payload belongs to.
 666     // The next 4 bytes of data shall contain the
 667     // Presentation Time for the media object that the payload belongs to.
 668     put_byte(pb, ASF_PAYLOAD_REPLICATED_DATA_LENGTH);
 669
 670     put_le32(pb, m_obj_size);       //Replicated Data - Media Object Size
 671     put_le32(pb, presentation_time);//Replicated Data - Presentation Time
 672
 673     if (asf->multi_payloads_present){
 674         put_le16(pb, payload_len);   //payload length
 675     }
 676 }
 677
 678 static void put_frame(
 679                     AVFormatContext *s,
 680                     ASFStream       *stream,
 681                     AVStream        *avst,
 682                     int             timestamp,
 683                     const uint8_t   *buf,
 684                     int             m_obj_size,
 685                     int             flags
 686                 )
 687 {
 688     ASFContext *asf = s->priv_data;
 689     int m_obj_offset, payload_len, frag_len1;
 690
 691     m_obj_offset = 0;
 692     while (m_obj_offset < m_obj_size) {
 693         payload_len = m_obj_size - m_obj_offset;
 694         if (asf->packet_timestamp_start == -1) {
 695             asf->multi_payloads_present = (payload_len < MULTI_PAYLOAD_CONSTANT);
 696
 697             asf->packet_size_left = PACKET_SIZE;
 698             if (asf->multi_payloads_present){
 699                 frag_len1 = MULTI_PAYLOAD_CONSTANT - 1;
 700             }
 701             else {
 702                 frag_len1 = SINGLE_PAYLOAD_DATA_LENGTH;
 703             }
 704             asf->packet_timestamp_start = timestamp;
 705         }
 706         else {
 707             // multi payloads
 708             frag_len1 = asf->packet_size_left - PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS - PACKET_HEADER_MIN_SIZE - 1;
 709
 710             if(frag_len1 < payload_len && avst->codec->codec_type == CODEC_TYPE_AUDIO){
 711                 flush_packet(s);
 712                 continue;
 713             }
 714         }
 715         if (frag_len1 > 0) {
 716             if (payload_len > frag_len1)
 717                 payload_len = frag_len1;
 718             else if (payload_len == (frag_len1 - 1))
 719                 payload_len = frag_len1 - 2;  //additional byte need to put padding length
 720
 721             put_payload_header(s, stream, timestamp+PREROLL_TIME, m_obj_size, m_obj_offset, payload_len, flags);
 722             put_buffer(&asf->pb, buf, payload_len);
 723
 724             if (asf->multi_payloads_present)
 725                 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS);
 726             else
 727                 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD);
 728             asf->packet_timestamp_end = timestamp;
 729
 730             asf->packet_nb_payloads++;
 731         } else {
 732             payload_len = 0;
 733         }
 734         m_obj_offset += payload_len;
 735         buf += payload_len;
 736
 737         if (!asf->multi_payloads_present)
 738             flush_packet(s);
 739         else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + PACKET_HEADER_MIN_SIZE + 1))
 740             flush_packet(s);
 741     }
 742     stream->seq++;
 743 }
 744
 745 static int asf_write_packet(AVFormatContext *s, AVPacket *pkt)
 746 {
 747     ASFContext *asf = s->priv_data;
 748     ASFStream *stream;
 749     int64_t duration;
 750     AVCodecContext *codec;
 751     int64_t packet_st,pts;
 752     int start_sec,i;
 753     int flags= pkt->flags;
 754
 755     codec = s->streams[pkt->stream_index]->codec;
 756     stream = &asf->streams[pkt->stream_index];
 757
 758     if(codec->codec_type == CODEC_TYPE_AUDIO)
 759         flags &= ~PKT_FLAG_KEY;
 760
 761     pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts;
 762     assert(pts != AV_NOPTS_VALUE);
 763     duration = pts * 10000;
 764     asf->duration= FFMAX(asf->duration, duration + pkt->duration * 10000);
 765
 766     packet_st = asf->nb_packets;
 767     put_frame(s, stream, s->streams[pkt->stream_index], pkt->dts, pkt->data, pkt->size, flags);
 768
 769     /* check index */
 770     if ((!asf->is_streamed) && (flags & PKT_FLAG_KEY)) {
 771         start_sec = (int)(duration / INT64_C(10000000));
 772         if (start_sec != (int)(asf->last_indexed_pts / INT64_C(10000000))) {
 773             for(i=asf->nb_index_count;i<start_sec;i++) {
 774                 if (i>=asf->nb_index_memory_alloc) {
 775                     asf->nb_index_memory_alloc += ASF_INDEX_BLOCK;
 776                     asf->index_ptr = (ASFIndex*)av_realloc( asf->index_ptr, sizeof(ASFIndex) * asf->nb_index_memory_alloc );
 777                 }
 778                 // store
 779                 asf->index_ptr[i].packet_number = (uint32_t)packet_st;
 780                 asf->index_ptr[i].packet_count  = (uint16_t)(asf->nb_packets-packet_st);
 781                 asf->maximum_packet = FFMAX(asf->maximum_packet, (uint16_t)(asf->nb_packets-packet_st));
 782             }
 783             asf->nb_index_count = start_sec;
 784             asf->last_indexed_pts = duration;
 785         }
 786     }
 787     return 0;
 788 }
 789
 790 //
 791 static int asf_write_index(AVFormatContext *s, ASFIndex *index, uint16_t max, uint32_t count)
 792 {
 793     ByteIOContext *pb = s->pb;
 794     int i;
 795
 796     put_guid(pb, &ff_asf_simple_index_header);
 797     put_le64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2)*count);
 798     put_guid(pb, &ff_asf_my_guid);
 799     put_le64(pb, ASF_INDEXED_INTERVAL);
 800     put_le32(pb, max);
 801     put_le32(pb, count);
 802     for(i=0; i<count; i++) {
 803         put_le32(pb, index[i].packet_number);
 804         put_le16(pb, index[i].packet_count);
 805     }
 806
 807     return 0;
 808 }
 809
 810 static int asf_write_trailer(AVFormatContext *s)
 811 {
 812     ASFContext *asf = s->priv_data;
 813     int64_t file_size,data_size;
 814
 815     /* flush the current packet */
 816     if (asf->pb.buf_ptr > asf->pb.buffer)
 817         flush_packet(s);
 818
 819     /* write index */
 820     data_size = url_ftell(s->pb);
 821     if ((!asf->is_streamed) && (asf->nb_index_count != 0)) {
 822         asf_write_index(s, asf->index_ptr, asf->maximum_packet, asf->nb_index_count);
 823     }
 824     put_flush_packet(s->pb);
 825
 826     if (asf->is_streamed || url_is_streamed(s->pb)) {
 827         put_chunk(s, 0x4524, 0, 0); /* end of stream */
 828     } else {
 829         /* rewrite an updated header */
 830         file_size = url_ftell(s->pb);
 831         url_fseek(s->pb, 0, SEEK_SET);
 832         asf_write_header1(s, file_size, data_size - asf->data_offset);
 833     }
 834
 835     put_flush_packet(s->pb);
 836     av_free(asf->index_ptr);
 837     return 0;
 838 }
 839
 840 #if CONFIG_ASF_MUXER
 841 AVOutputFormat asf_muxer = {
 842     "asf",
 843     NULL_IF_CONFIG_SMALL("ASF format"),
 844     "video/x-ms-asf",
 845     "asf,wmv,wma",
 846     sizeof(ASFContext),
 847 #if CONFIG_LIBMP3LAME
 848     CODEC_ID_MP3,
 849 #else
 850     CODEC_ID_MP2,
 851 #endif
 852     CODEC_ID_MSMPEG4V3,
 853     asf_write_header,
 854     asf_write_packet,
 855     asf_write_trailer,
 856     .flags = AVFMT_GLOBALHEADER,
 857     .codec_tag= (const AVCodecTag* const []){codec_asf_bmp_tags, codec_bmp_tags, codec_wav_tags, 0},
 858     .metadata_conv = ff_asf_metadata_conv,
 859 };
 860 #endif
 861
 862 #if CONFIG_ASF_STREAM_MUXER
 863 AVOutputFormat asf_stream_muxer = {
 864     "asf_stream",
 865     NULL_IF_CONFIG_SMALL("ASF format"),
 866     "video/x-ms-asf",
 867     "asf,wmv,wma",
 868     sizeof(ASFContext),
 869 #if CONFIG_LIBMP3LAME
 870     CODEC_ID_MP3,
 871 #else
 872     CODEC_ID_MP2,
 873 #endif
 874     CODEC_ID_MSMPEG4V3,
 875     asf_write_stream_header,
 876     asf_write_packet,
 877     asf_write_trailer,
 878     .flags = AVFMT_GLOBALHEADER,
 879     .codec_tag= (const AVCodecTag* const []){codec_asf_bmp_tags, codec_bmp_tags, codec_wav_tags, 0},
 880     .metadata_conv = ff_asf_metadata_conv,
 881 };
 882 #endif //CONFIG_ASF_STREAM_MUXER