libavformat/asf-enc.c

   1 /*
   2  * Adaptive stream format 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 "riff.h"
  23 #include "asf.h"
  24
  25 #undef NDEBUG
  26 #include <assert.h>
  27
  28
  29 #define ASF_INDEXED_INTERVAL    10000000
  30 #define ASF_INDEX_BLOCK         600
  31
  32 #define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
  33 #define ASF_PACKET_ERROR_CORRECTION_FLAGS (\
  34                 ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT | \
  35                 ASF_PACKET_ERROR_CORRECTION_DATA_SIZE\
  36                 )
  37
  38 #if (ASF_PACKET_ERROR_CORRECTION_FLAGS != 0)
  39 #   define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 1
  40 #else
  41 #   define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 0
  42 #endif
  43
  44 #define ASF_PPI_PROPERTY_FLAGS (\
  45                 ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE | \
  46                 ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD | \
  47                 ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE | \
  48                 ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE \
  49                 )
  50
  51 #define ASF_PPI_LENGTH_TYPE_FLAGS 0
  52
  53 #define ASF_PAYLOAD_FLAGS ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD
  54
  55 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
  56 #   define ASF_PPI_SEQUENCE_FIELD_SIZE 1
  57 #endif
  58 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
  59 #   define ASF_PPI_SEQUENCE_FIELD_SIZE 2
  60 #endif
  61 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
  62 #   define ASF_PPI_SEQUENCE_FIELD_SIZE 4
  63 #endif
  64 #ifndef ASF_PPI_SEQUENCE_FIELD_SIZE
  65 #   define ASF_PPI_SEQUENCE_FIELD_SIZE 0
  66 #endif
  67
  68
  69 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
  70 #   define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 1
  71 #endif
  72 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
  73 #   define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 2
  74 #endif
  75 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
  76 #   define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 4
  77 #endif
  78 #ifndef ASF_PPI_PACKET_LENGTH_FIELD_SIZE
  79 #   define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 0
  80 #endif
  81
  82 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
  83 #   define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 1
  84 #endif
  85 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
  86 #   define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 2
  87 #endif
  88 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
  89 #   define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 4
  90 #endif
  91 #ifndef ASF_PPI_PADDING_LENGTH_FIELD_SIZE
  92 #   define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 0
  93 #endif
  94
  95 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
  96 #   define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 1
  97 #endif
  98 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
  99 #   define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 2
 100 #endif
 101 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
 102 #   define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 4
 103 #endif
 104 #ifndef ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE
 105 #   define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 0
 106 #endif
 107
 108 #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))
 109 #   define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 1
 110 #endif
 111 #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))
 112 #   define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 2
 113 #endif
 114 #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))
 115 #   define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 4
 116 #endif
 117 #ifndef ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE
 118 #   define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 0
 119 #endif
 120
 121 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
 122 #   define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 1
 123 #endif
 124 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
 125 #   define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 2
 126 #endif
 127 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
 128 #   define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 4
 129 #endif
 130 #ifndef ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE
 131 #   define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 0
 132 #endif
 133
 134 #if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
 135 #   define ASF_PAYLOAD_LENGTH_FIELD_SIZE 1
 136 #endif
 137 #if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
 138 #   define ASF_PAYLOAD_LENGTH_FIELD_SIZE 2
 139 #endif
 140 #ifndef ASF_PAYLOAD_LENGTH_FIELD_SIZE
 141 #   define ASF_PAYLOAD_LENGTH_FIELD_SIZE 0
 142 #endif
 143
 144 #define PACKET_HEADER_MIN_SIZE (\
 145                 ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE + \
 146                 ASF_PACKET_ERROR_CORRECTION_DATA_SIZE + \
 147                 1 + /*Length Type Flags*/ \
 148                 1 + /*Property Flags*/ \
 149                 ASF_PPI_PACKET_LENGTH_FIELD_SIZE + \
 150                 ASF_PPI_SEQUENCE_FIELD_SIZE + \
 151                 ASF_PPI_PADDING_LENGTH_FIELD_SIZE + \
 152                 4 + /*Send Time Field*/ \
 153                 2   /*Duration Field*/ \
 154                 )
 155
 156
 157 // Replicated Data shall be at least 8 bytes long.
 158 #define ASF_PAYLOAD_REPLICATED_DATA_LENGTH 0x08
 159
 160 #define PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD (\
 161                 1 + /*Stream Number*/ \
 162                 ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
 163                 ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
 164                 ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
 165                 ASF_PAYLOAD_REPLICATED_DATA_LENGTH \
 166                 )
 167
 168 #define PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS (\
 169                 1 + /*Stream Number*/ \
 170                 ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
 171                 ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
 172                 ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
 173                 ASF_PAYLOAD_REPLICATED_DATA_LENGTH + \
 174                 ASF_PAYLOAD_LENGTH_FIELD_SIZE \
 175                 )
 176
 177 #define SINGLE_PAYLOAD_DATA_LENGTH (\
 178                 PACKET_SIZE - \
 179                 PACKET_HEADER_MIN_SIZE - \
 180                 PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD \
 181                 )
 182
 183 #define MULTI_PAYLOAD_CONSTANT (\
 184                 PACKET_SIZE - \
 185                 PACKET_HEADER_MIN_SIZE - \
 186                 1 - /*Payload Flags*/ \
 187                 2*PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS \
 188                 )
 189
 190 static const AVCodecTag codec_asf_bmp_tags[] = {
 191     { CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
 192     { CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
 193     { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
 194     { CODEC_ID_NONE, 0 },
 195 };
 196
 197 #define PREROLL_TIME 3100
 198
 199 static void put_guid(ByteIOContext *s, const GUID *g)
 200 {
 201     assert(sizeof(*g) == 16);
 202     put_buffer(s, *g, sizeof(*g));
 203 }
 204
 205 static void put_str16_nolen(ByteIOContext *s, const char *tag);
 206 static void put_str16(ByteIOContext *s, const char *tag)
 207 {
 208     put_le16(s,strlen(tag) + 1);
 209     put_str16_nolen(s, tag);
 210 }
 211
 212 static void put_str16_nolen(ByteIOContext *s, const char *tag)
 213 {
 214     int c;
 215
 216     do{
 217         c = (uint8_t)*tag++;
 218         put_le16(s, c);
 219     }while(c);
 220 }
 221
 222 static int64_t put_header(ByteIOContext *pb, const GUID *g)
 223 {
 224     int64_t pos;
 225
 226     pos = url_ftell(pb);
 227     put_guid(pb, g);
 228     put_le64(pb, 24);
 229     return pos;
 230 }
 231
 232 /* update header size */
 233 static void end_header(ByteIOContext *pb, int64_t pos)
 234 {
 235     int64_t pos1;
 236
 237     pos1 = url_ftell(pb);
 238     url_fseek(pb, pos + 16, SEEK_SET);
 239     put_le64(pb, pos1 - pos);
 240     url_fseek(pb, pos1, SEEK_SET);
 241 }
 242
 243 /* write an asf chunk (only used in streaming case) */
 244 static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
 245 {
 246     ASFContext *asf = s->priv_data;
 247     ByteIOContext *pb = s->pb;
 248     int length;
 249
 250     length = payload_length + 8;
 251     put_le16(pb, type);
 252     put_le16(pb, length);    //size
 253     put_le32(pb, asf->seqno);//sequence number
 254     put_le16(pb, flags); /* unknown bytes */
 255     put_le16(pb, length);    //size_confirm
 256     asf->seqno++;
 257 }
 258
 259 /* convert from unix to windows time */
 260 static int64_t unix_to_file_time(int ti)
 261 {
 262     int64_t t;
 263
 264     t = ti * INT64_C(10000000);
 265     t += INT64_C(116444736000000000);
 266     return t;
 267 }
 268
 269 /* write the header (used two times if non streamed) */
 270 static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size)
 271 {
 272     ASFContext *asf = s->priv_data;
 273     ByteIOContext *pb = s->pb;
 274     int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
 275     int has_title;
 276     AVCodecContext *enc;
 277     int64_t header_offset, cur_pos, hpos;
 278     int bit_rate;
 279     int64_t duration;
 280
 281     duration = asf->duration + PREROLL_TIME * 10000;
 282     has_title = (s->title[0] || s->author[0] || s->copyright[0] || s->comment[0]);
 283
 284     bit_rate = 0;
 285     for(n=0;n<s->nb_streams;n++) {
 286         enc = s->streams[n]->codec;
 287
 288         av_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */
 289
 290         bit_rate += enc->bit_rate;
 291     }
 292
 293     if (asf->is_streamed) {
 294         put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
 295     }
 296
 297     put_guid(pb, &asf_header);
 298     put_le64(pb, -1); /* header length, will be patched after */
 299     put_le32(pb, 3 + has_title + s->nb_streams); /* number of chunks in header */
 300     put_byte(pb, 1); /* ??? */
 301     put_byte(pb, 2); /* ??? */
 302
 303     /* file header */
 304     header_offset = url_ftell(pb);
 305     hpos = put_header(pb, &file_header);
 306     put_guid(pb, &my_guid);
 307     put_le64(pb, file_size);
 308     file_time = 0;
 309     put_le64(pb, unix_to_file_time(file_time));
 310     put_le64(pb, asf->nb_packets); /* number of packets */
 311     put_le64(pb, duration); /* end time stamp (in 100ns units) */
 312     put_le64(pb, asf->duration); /* duration (in 100ns units) */
 313     put_le64(pb, PREROLL_TIME); /* start time stamp */
 314     put_le32(pb, (asf->is_streamed || url_is_streamed(pb)) ? 3 : 2); /* ??? */
 315     put_le32(pb, asf->packet_size); /* packet size */
 316     put_le32(pb, asf->packet_size); /* packet size */
 317     put_le32(pb, bit_rate); /* Nominal data rate in bps */
 318     end_header(pb, hpos);
 319
 320     /* unknown headers */
 321     hpos = put_header(pb, &head1_guid);
 322     put_guid(pb, &head2_guid);
 323     put_le32(pb, 6);
 324     put_le16(pb, 0);
 325     end_header(pb, hpos);
 326
 327     /* title and other infos */
 328     if (has_title) {
 329         hpos = put_header(pb, &comment_header);
 330         if ( s->title[0]     ) { put_le16(pb, 2 * (strlen(s->title    ) + 1)); } else { put_le16(pb, 0); }
 331         if ( s->author[0]    ) { put_le16(pb, 2 * (strlen(s->author   ) + 1)); } else { put_le16(pb, 0); }
 332         if ( s->copyright[0] ) { put_le16(pb, 2 * (strlen(s->copyright) + 1)); } else { put_le16(pb, 0); }
 333         if ( s->comment[0]   ) { put_le16(pb, 2 * (strlen(s->comment  ) + 1)); } else { put_le16(pb, 0); }
 334         put_le16(pb, 0);
 335         if ( s->title[0]     ) put_str16_nolen(pb, s->title);
 336         if ( s->author[0]    ) put_str16_nolen(pb, s->author);
 337         if ( s->copyright[0] ) put_str16_nolen(pb, s->copyright);
 338         if ( s->comment[0]   ) put_str16_nolen(pb, s->comment);
 339         end_header(pb, hpos);
 340     }
 341
 342     /* stream headers */
 343     for(n=0;n<s->nb_streams;n++) {
 344         int64_t es_pos;
 345         //        ASFStream *stream = &asf->streams[n];
 346
 347         enc = s->streams[n]->codec;
 348         asf->streams[n].num = n + 1;
 349         asf->streams[n].seq = 0;
 350
 351
 352         switch(enc->codec_type) {
 353         case CODEC_TYPE_AUDIO:
 354             wav_extra_size = 0;
 355             extra_size = 18 + wav_extra_size;
 356             extra_size2 = 8;
 357             break;
 358         default:
 359         case CODEC_TYPE_VIDEO:
 360             wav_extra_size = enc->extradata_size;
 361             extra_size = 0x33 + wav_extra_size;
 362             extra_size2 = 0;
 363             break;
 364         }
 365
 366         hpos = put_header(pb, &stream_header);
 367         if (enc->codec_type == CODEC_TYPE_AUDIO) {
 368             put_guid(pb, &audio_stream);
 369             put_guid(pb, &audio_conceal_spread);
 370         } else {
 371             put_guid(pb, &video_stream);
 372             put_guid(pb, &video_conceal_none);
 373         }
 374         put_le64(pb, 0); /* ??? */
 375         es_pos = url_ftell(pb);
 376         put_le32(pb, extra_size); /* wav header len */
 377         put_le32(pb, extra_size2); /* additional data len */
 378         put_le16(pb, n + 1); /* stream number */
 379         put_le32(pb, 0); /* ??? */
 380
 381         if (enc->codec_type == CODEC_TYPE_AUDIO) {
 382             /* WAVEFORMATEX header */
 383             int wavsize = put_wav_header(pb, enc);
 384             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)) {
 385                 wavsize += 2;
 386                 put_le16(pb, 0);
 387             }
 388
 389             if (wavsize < 0)
 390                 return -1;
 391             if (wavsize != extra_size) {
 392                 cur_pos = url_ftell(pb);
 393                 url_fseek(pb, es_pos, SEEK_SET);
 394                 put_le32(pb, wavsize); /* wav header len */
 395                 url_fseek(pb, cur_pos, SEEK_SET);
 396             }
 397             /* ERROR Correction */
 398             put_byte(pb, 0x01);
 399             if(enc->codec_id == CODEC_ID_ADPCM_G726 || !enc->block_align){
 400                 put_le16(pb, 0x0190);
 401                 put_le16(pb, 0x0190);
 402             }else{
 403                 put_le16(pb, enc->block_align);
 404                 put_le16(pb, enc->block_align);
 405             }
 406             put_le16(pb, 0x01);
 407             put_byte(pb, 0x00);
 408         } else {
 409             put_le32(pb, enc->width);
 410             put_le32(pb, enc->height);
 411             put_byte(pb, 2); /* ??? */
 412             put_le16(pb, 40 + enc->extradata_size); /* size */
 413
 414             /* BITMAPINFOHEADER header */
 415             put_bmp_header(pb, enc, codec_bmp_tags, 1);
 416         }
 417         end_header(pb, hpos);
 418     }
 419
 420     /* media comments */
 421
 422     hpos = put_header(pb, &codec_comment_header);
 423     put_guid(pb, &codec_comment1_header);
 424     put_le32(pb, s->nb_streams);
 425     for(n=0;n<s->nb_streams;n++) {
 426         AVCodec *p;
 427
 428         enc = s->streams[n]->codec;
 429         p = avcodec_find_encoder(enc->codec_id);
 430
 431         if(enc->codec_type == CODEC_TYPE_AUDIO)
 432             put_le16(pb, 2);
 433         else if(enc->codec_type == CODEC_TYPE_VIDEO)
 434             put_le16(pb, 1);
 435         else
 436             put_le16(pb, -1);
 437
 438         if(enc->codec_id == CODEC_ID_WMAV2)
 439             put_str16(pb, "Windows Media Audio V8");
 440         else
 441             put_str16(pb, p ? p->name : enc->codec_name);
 442         put_le16(pb, 0); /* no parameters */
 443
 444
 445         /* id */
 446         if (enc->codec_type == CODEC_TYPE_AUDIO) {
 447             put_le16(pb, 2);
 448             put_le16(pb, enc->codec_tag);
 449         } else {
 450             put_le16(pb, 4);
 451             put_le32(pb, enc->codec_tag);
 452         }
 453         if(!enc->codec_tag)
 454             return -1;
 455     }
 456     end_header(pb, hpos);
 457
 458     /* patch the header size fields */
 459
 460     cur_pos = url_ftell(pb);
 461     header_size = cur_pos - header_offset;
 462     if (asf->is_streamed) {
 463         header_size += 8 + 30 + 50;
 464
 465         url_fseek(pb, header_offset - 10 - 30, SEEK_SET);
 466         put_le16(pb, header_size);
 467         url_fseek(pb, header_offset - 2 - 30, SEEK_SET);
 468         put_le16(pb, header_size);
 469
 470         header_size -= 8 + 30 + 50;
 471     }
 472     header_size += 24 + 6;
 473     url_fseek(pb, header_offset - 14, SEEK_SET);
 474     put_le64(pb, header_size);
 475     url_fseek(pb, cur_pos, SEEK_SET);
 476
 477     /* movie chunk, followed by packets of packet_size */
 478     asf->data_offset = cur_pos;
 479     put_guid(pb, &data_header);
 480     put_le64(pb, data_chunk_size);
 481     put_guid(pb, &my_guid);
 482     put_le64(pb, asf->nb_packets); /* nb packets */
 483     put_byte(pb, 1); /* ??? */
 484     put_byte(pb, 1); /* ??? */
 485     return 0;
 486 }
 487
 488 static int asf_write_header(AVFormatContext *s)
 489 {
 490     ASFContext *asf = s->priv_data;
 491
 492     asf->packet_size = PACKET_SIZE;
 493     asf->nb_packets = 0;
 494
 495     asf->last_indexed_pts = 0;
 496     asf->index_ptr = av_malloc( sizeof(ASFIndex) * ASF_INDEX_BLOCK );
 497     asf->nb_index_memory_alloc = ASF_INDEX_BLOCK;
 498     asf->nb_index_count = 0;
 499     asf->maximum_packet = 0;
 500
 501     /* the data-chunk-size has to be 50, which is data_size - asf->data_offset
 502      *  at the moment this function is done. It is needed to use asf as
 503      *  streamable format. */
 504     if (asf_write_header1(s, 0, 50) < 0) {
 505         //av_free(asf);
 506         return -1;
 507     }
 508
 509     put_flush_packet(s->pb);
 510
 511     asf->packet_nb_payloads = 0;
 512     asf->packet_timestamp_start = -1;
 513     asf->packet_timestamp_end = -1;
 514     init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
 515                   NULL, NULL, NULL, NULL);
 516
 517     return 0;
 518 }
 519
 520 static int asf_write_stream_header(AVFormatContext *s)
 521 {
 522     ASFContext *asf = s->priv_data;
 523
 524     asf->is_streamed = 1;
 525
 526     return asf_write_header(s);
 527 }
 528
 529 static int put_payload_parsing_info(
 530                                 AVFormatContext *s,
 531                                 unsigned int    sendtime,
 532                                 unsigned int    duration,
 533                                 int             nb_payloads,
 534                                 int             padsize
 535             )
 536 {
 537     ASFContext *asf = s->priv_data;
 538     ByteIOContext *pb = s->pb;
 539     int ppi_size, i;
 540     int64_t start= url_ftell(pb);
 541
 542     int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS;
 543
 544     padsize -= PACKET_HEADER_MIN_SIZE;
 545     if(asf->multi_payloads_present)
 546         padsize--;
 547     assert(padsize>=0);
 548
 549     put_byte(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS);
 550     for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++){
 551         put_byte(pb, 0x0);
 552     }
 553
 554     if (asf->multi_payloads_present)
 555         iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT;
 556
 557     if (padsize > 0) {
 558         if (padsize < 256)
 559             iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE;
 560         else
 561             iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD;
 562     }
 563     put_byte(pb, iLengthTypeFlags);
 564
 565     put_byte(pb, ASF_PPI_PROPERTY_FLAGS);
 566
 567     if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD)
 568         put_le16(pb, padsize - 2);
 569     if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE)
 570         put_byte(pb, padsize - 1);
 571
 572     put_le32(pb, sendtime);
 573     put_le16(pb, duration);
 574     if (asf->multi_payloads_present)
 575         put_byte(pb, nb_payloads | ASF_PAYLOAD_FLAGS);
 576
 577     ppi_size = url_ftell(pb) - start;
 578
 579     return ppi_size;
 580 }
 581
 582 static void flush_packet(AVFormatContext *s)
 583 {
 584     ASFContext *asf = s->priv_data;
 585     int packet_hdr_size, packet_filled_size;
 586
 587     assert(asf->packet_timestamp_end >= asf->packet_timestamp_start);
 588
 589     if (asf->is_streamed) {
 590         put_chunk(s, 0x4424, asf->packet_size, 0);
 591     }
 592
 593     packet_hdr_size = put_payload_parsing_info(
 594                             s,
 595                             asf->packet_timestamp_start,
 596                             asf->packet_timestamp_end - asf->packet_timestamp_start,
 597                             asf->packet_nb_payloads,
 598                             asf->packet_size_left
 599                         );
 600
 601     packet_filled_size = PACKET_SIZE - asf->packet_size_left;
 602     assert(packet_hdr_size <= asf->packet_size_left);
 603     memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left);
 604
 605     put_buffer(s->pb, asf->packet_buf, asf->packet_size - packet_hdr_size);
 606
 607     put_flush_packet(s->pb);
 608     asf->nb_packets++;
 609     asf->packet_nb_payloads = 0;
 610     asf->packet_timestamp_start = -1;
 611     asf->packet_timestamp_end = -1;
 612     init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
 613                   NULL, NULL, NULL, NULL);
 614 }
 615
 616 static void put_payload_header(
 617                                 AVFormatContext *s,
 618                                 ASFStream       *stream,
 619                                 int             presentation_time,
 620                                 int             m_obj_size,
 621                                 int             m_obj_offset,
 622                                 int             payload_len,
 623                                 int             flags
 624             )
 625 {
 626     ASFContext *asf = s->priv_data;
 627     ByteIOContext *pb = &asf->pb;
 628     int val;
 629
 630     val = stream->num;
 631     if (flags & PKT_FLAG_KEY)
 632         val |= ASF_PL_FLAG_KEY_FRAME;
 633     put_byte(pb, val);
 634
 635     put_byte(pb, stream->seq);  //Media object number
 636     put_le32(pb, m_obj_offset); //Offset Into Media Object
 637
 638     // Replicated Data shall be at least 8 bytes long.
 639     // The first 4 bytes of data shall contain the
 640     // Size of the Media Object that the payload belongs to.
 641     // The next 4 bytes of data shall contain the
 642     // Presentation Time for the media object that the payload belongs to.
 643     put_byte(pb, ASF_PAYLOAD_REPLICATED_DATA_LENGTH);
 644
 645     put_le32(pb, m_obj_size);       //Replicated Data - Media Object Size
 646     put_le32(pb, presentation_time);//Replicated Data - Presentation Time
 647
 648     if (asf->multi_payloads_present){
 649         put_le16(pb, payload_len);   //payload length
 650     }
 651 }
 652
 653 static void put_frame(
 654                     AVFormatContext *s,
 655                     ASFStream       *stream,
 656                     AVStream        *avst,
 657                     int             timestamp,
 658                     const uint8_t   *buf,
 659                     int             m_obj_size,
 660                     int             flags
 661                 )
 662 {
 663     ASFContext *asf = s->priv_data;
 664     int m_obj_offset, payload_len, frag_len1;
 665
 666     m_obj_offset = 0;
 667     while (m_obj_offset < m_obj_size) {
 668         payload_len = m_obj_size - m_obj_offset;
 669         if (asf->packet_timestamp_start == -1) {
 670             asf->multi_payloads_present = (payload_len < MULTI_PAYLOAD_CONSTANT);
 671
 672             asf->packet_size_left = PACKET_SIZE;
 673             if (asf->multi_payloads_present){
 674                 frag_len1 = MULTI_PAYLOAD_CONSTANT - 1;
 675             }
 676             else {
 677                 frag_len1 = SINGLE_PAYLOAD_DATA_LENGTH;
 678             }
 679             asf->packet_timestamp_start = timestamp;
 680         }
 681         else {
 682             // multi payloads
 683             frag_len1 = asf->packet_size_left - PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS - PACKET_HEADER_MIN_SIZE - 1;
 684
 685             if(frag_len1 < payload_len && avst->codec->codec_type == CODEC_TYPE_AUDIO){
 686                 flush_packet(s);
 687                 continue;
 688             }
 689         }
 690         if (frag_len1 > 0) {
 691             if (payload_len > frag_len1)
 692                 payload_len = frag_len1;
 693             else if (payload_len == (frag_len1 - 1))
 694                 payload_len = frag_len1 - 2;  //additional byte need to put padding length
 695
 696             put_payload_header(s, stream, timestamp+PREROLL_TIME, m_obj_size, m_obj_offset, payload_len, flags);
 697             put_buffer(&asf->pb, buf, payload_len);
 698
 699             if (asf->multi_payloads_present)
 700                 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS);
 701             else
 702                 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD);
 703             asf->packet_timestamp_end = timestamp;
 704
 705             asf->packet_nb_payloads++;
 706         } else {
 707             payload_len = 0;
 708         }
 709         m_obj_offset += payload_len;
 710         buf += payload_len;
 711
 712         if (!asf->multi_payloads_present)
 713             flush_packet(s);
 714         else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + PACKET_HEADER_MIN_SIZE + 1))
 715             flush_packet(s);
 716     }
 717     stream->seq++;
 718 }
 719
 720 static int asf_write_packet(AVFormatContext *s, AVPacket *pkt)
 721 {
 722     ASFContext *asf = s->priv_data;
 723     ASFStream *stream;
 724     int64_t duration;
 725     AVCodecContext *codec;
 726     int64_t packet_st,pts;
 727     int start_sec,i;
 728     int flags= pkt->flags;
 729
 730     codec = s->streams[pkt->stream_index]->codec;
 731     stream = &asf->streams[pkt->stream_index];
 732
 733     if(codec->codec_type == CODEC_TYPE_AUDIO)
 734         flags &= ~PKT_FLAG_KEY;
 735
 736     pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts;
 737     assert(pts != AV_NOPTS_VALUE);
 738     duration = pts * 10000;
 739     asf->duration= FFMAX(asf->duration, duration + pkt->duration * 10000);
 740
 741     packet_st = asf->nb_packets;
 742     put_frame(s, stream, s->streams[pkt->stream_index], pkt->dts, pkt->data, pkt->size, flags);
 743
 744     /* check index */
 745     if ((!asf->is_streamed) && (flags & PKT_FLAG_KEY)) {
 746         start_sec = (int)(duration / INT64_C(10000000));
 747         if (start_sec != (int)(asf->last_indexed_pts / INT64_C(10000000))) {
 748             for(i=asf->nb_index_count;i<start_sec;i++) {
 749                 if (i>=asf->nb_index_memory_alloc) {
 750                     asf->nb_index_memory_alloc += ASF_INDEX_BLOCK;
 751                     asf->index_ptr = (ASFIndex*)av_realloc( asf->index_ptr, sizeof(ASFIndex) * asf->nb_index_memory_alloc );
 752                 }
 753                 // store
 754                 asf->index_ptr[i].packet_number = (uint32_t)packet_st;
 755                 asf->index_ptr[i].packet_count  = (uint16_t)(asf->nb_packets-packet_st);
 756                 asf->maximum_packet = FFMAX(asf->maximum_packet, (uint16_t)(asf->nb_packets-packet_st));
 757             }
 758             asf->nb_index_count = start_sec;
 759             asf->last_indexed_pts = duration;
 760         }
 761     }
 762     return 0;
 763 }
 764
 765 //
 766 static int asf_write_index(AVFormatContext *s, ASFIndex *index, uint16_t max, uint32_t count)
 767 {
 768     ByteIOContext *pb = s->pb;
 769     int i;
 770
 771     put_guid(pb, &simple_index_header);
 772     put_le64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2)*count);
 773     put_guid(pb, &my_guid);
 774     put_le64(pb, ASF_INDEXED_INTERVAL);
 775     put_le32(pb, max);
 776     put_le32(pb, count);
 777     for(i=0; i<count; i++) {
 778         put_le32(pb, index[i].packet_number);
 779         put_le16(pb, index[i].packet_count);
 780     }
 781
 782     return 0;
 783 }
 784
 785 static int asf_write_trailer(AVFormatContext *s)
 786 {
 787     ASFContext *asf = s->priv_data;
 788     int64_t file_size,data_size;
 789
 790     /* flush the current packet */
 791     if (asf->pb.buf_ptr > asf->pb.buffer)
 792         flush_packet(s);
 793
 794     /* write index */
 795     data_size = url_ftell(s->pb);
 796     if ((!asf->is_streamed) && (asf->nb_index_count != 0)) {
 797         asf_write_index(s, asf->index_ptr, asf->maximum_packet, asf->nb_index_count);
 798     }
 799     put_flush_packet(s->pb);
 800
 801     if (asf->is_streamed || url_is_streamed(s->pb)) {
 802         put_chunk(s, 0x4524, 0, 0); /* end of stream */
 803     } else {
 804         /* rewrite an updated header */
 805         file_size = url_ftell(s->pb);
 806         url_fseek(s->pb, 0, SEEK_SET);
 807         asf_write_header1(s, file_size, data_size - asf->data_offset);
 808     }
 809
 810     put_flush_packet(s->pb);
 811     av_free(asf->index_ptr);
 812     return 0;
 813 }
 814
 815 #ifdef CONFIG_ASF_MUXER
 816 AVOutputFormat asf_muxer = {
 817     "asf",
 818     NULL_IF_CONFIG_SMALL("ASF format"),
 819     "video/x-ms-asf",
 820     "asf,wmv,wma",
 821     sizeof(ASFContext),
 822 #ifdef CONFIG_LIBMP3LAME
 823     CODEC_ID_MP3,
 824 #else
 825     CODEC_ID_MP2,
 826 #endif
 827     CODEC_ID_MSMPEG4V3,
 828     asf_write_header,
 829     asf_write_packet,
 830     asf_write_trailer,
 831     .flags = AVFMT_GLOBALHEADER,
 832     .codec_tag= (const AVCodecTag*[]){codec_asf_bmp_tags, codec_bmp_tags, codec_wav_tags, 0},
 833 };
 834 #endif
 835
 836 #ifdef CONFIG_ASF_STREAM_MUXER
 837 AVOutputFormat asf_stream_muxer = {
 838     "asf_stream",
 839     NULL_IF_CONFIG_SMALL("ASF format"),
 840     "video/x-ms-asf",
 841     "asf,wmv,wma",
 842     sizeof(ASFContext),
 843 #ifdef CONFIG_LIBMP3LAME
 844     CODEC_ID_MP3,
 845 #else
 846     CODEC_ID_MP2,
 847 #endif
 848     CODEC_ID_MSMPEG4V3,
 849     asf_write_stream_header,
 850     asf_write_packet,
 851     asf_write_trailer,
 852     .flags = AVFMT_GLOBALHEADER,
 853     .codec_tag= (const AVCodecTag*[]){codec_asf_bmp_tags, codec_bmp_tags, codec_wav_tags, 0},
 854 };
 855 #endif //CONFIG_ASF_STREAM_MUXER