asf-enc.c 25.2 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
/*
 * Adaptive stream format encoder
 * Copyright (c) 2000, 2001 Fabrice Bellard.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include "avformat.h"
#include "avi.h"
#include "asf.h"

#undef NDEBUG
#include <assert.h>

#ifdef CONFIG_ENCODERS
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187

#define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
#define ASF_PACKET_ERROR_CORRECTION_FLAGS (\
                                        ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT | \
                                        ASF_PACKET_ERROR_CORRECTION_DATA_SIZE\
                                        )

#if (ASF_PACKET_ERROR_CORRECTION_FLAGS != 0)
#   define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 1
#else
#   define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 0
#endif

#define ASF_PPI_PROPERTY_FLAGS (\
                        ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE | \
                        ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD | \
                        ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE | \
                        ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE \
                        )

#define ASF_PPI_LENGTH_TYPE_FLAGS 0

#define ASF_PAYLOAD_FLAGS ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD

#if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
#   define ASF_PPI_SEQUENCE_FIELD_SIZE 1
#endif
#if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
#   define ASF_PPI_SEQUENCE_FIELD_SIZE 2
#endif
#if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
#   define ASF_PPI_SEQUENCE_FIELD_SIZE 4
#endif
#ifndef ASF_PPI_SEQUENCE_FIELD_SIZE
#   define ASF_PPI_SEQUENCE_FIELD_SIZE 0
#endif


#if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
#   define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 1
#endif
#if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
#   define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 2
#endif
#if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
#   define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 4
#endif
#ifndef ASF_PPI_PACKET_LENGTH_FIELD_SIZE
#   define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 0
#endif

#if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
#   define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 1
#endif
#if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
#   define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 2
#endif
#if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
#   define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 4
#endif
#ifndef ASF_PPI_PADDING_LENGTH_FIELD_SIZE
#   define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 0
#endif

#if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
#   define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 1
#endif
#if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
#   define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 2
#endif
#if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
#   define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 4
#endif
#ifndef ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE
#   define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 0
#endif

#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))
#   define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 1
#endif
#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))
#   define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 2
#endif
#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))
#   define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 4
#endif
#ifndef ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE
#   define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 0
#endif

#if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
#   define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 1
#endif
#if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
#   define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 2
#endif
#if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
#   define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 4
#endif
#ifndef ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE
#   define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 0
#endif

#if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
#   define ASF_PAYLOAD_LENGTH_FIELD_SIZE 1
#endif
#if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
#   define ASF_PAYLOAD_LENGTH_FIELD_SIZE 2
#endif
#ifndef ASF_PAYLOAD_LENGTH_FIELD_SIZE
#   define ASF_PAYLOAD_LENGTH_FIELD_SIZE 0
#endif

#define PACKET_HEADER_MIN_SIZE (\
                        ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE + \
                        ASF_PACKET_ERROR_CORRECTION_DATA_SIZE + \
                        1 + /*Length Type Flags*/ \
                        1 + /*Property Flags*/ \
                        ASF_PPI_PACKET_LENGTH_FIELD_SIZE + \
                        ASF_PPI_SEQUENCE_FIELD_SIZE + \
                        ASF_PPI_PADDING_LENGTH_FIELD_SIZE + \
                        4 + /*Send Time Field*/ \
                        2   /*Duration Field*/ \
                        )


// Replicated Data shall be at least 8 bytes long.
#define ASF_PAYLOAD_REPLICATED_DATA_LENGTH 0x08

#define PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD (\
                        1 + /*Stream Number*/ \
                        ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
                        ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
                        ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
                        ASF_PAYLOAD_REPLICATED_DATA_LENGTH \
                        )
                        
#define PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS (\
                        1 + /*Stream Number*/ \
                        ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
                        ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
                        ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
                        ASF_PAYLOAD_REPLICATED_DATA_LENGTH + \
                        ASF_PAYLOAD_LENGTH_FIELD_SIZE \
                        )

#define SINGLE_PAYLOAD_DATA_LENGTH (\
                        PACKET_SIZE - \
                        PACKET_HEADER_MIN_SIZE - \
                        PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD \
                        )

#define MULTI_PAYLOAD_CONSTANT (\
                        PACKET_SIZE - \
                        PACKET_HEADER_MIN_SIZE - \
                        1 - /*Payload Flags*/ \
                        2*PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS \
                        )

static int preroll_time = 2000;

188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253
static void put_guid(ByteIOContext *s, const GUID *g)
{
    int i;

    put_le32(s, g->v1);
    put_le16(s, g->v2);
    put_le16(s, g->v3);
    for(i=0;i<8;i++)
        put_byte(s, g->v4[i]);
}

static void put_str16(ByteIOContext *s, const char *tag)
{
    int c;

    put_le16(s,strlen(tag) + 1);
    for(;;) {
        c = (uint8_t)*tag++;
        put_le16(s, c);
        if (c == '\0')
            break;
    }
}

static void put_str16_nolen(ByteIOContext *s, const char *tag)
{
    int c;

    for(;;) {
        c = (uint8_t)*tag++;
        put_le16(s, c);
        if (c == '\0')
            break;
    }
}

static int64_t put_header(ByteIOContext *pb, const GUID *g)
{
    int64_t pos;

    pos = url_ftell(pb);
    put_guid(pb, g);
    put_le64(pb, 24);
    return pos;
}

/* update header size */
static void end_header(ByteIOContext *pb, int64_t pos)
{
    int64_t pos1;

    pos1 = url_ftell(pb);
    url_fseek(pb, pos + 16, SEEK_SET);
    put_le64(pb, pos1 - pos);
    url_fseek(pb, pos1, SEEK_SET);
}

/* write an asf chunk (only used in streaming case) */
static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
{
    ASFContext *asf = s->priv_data;
    ByteIOContext *pb = &s->pb;
    int length;

    length = payload_length + 8;
    put_le16(pb, type);
254 255
    put_le16(pb, length);    //size
    put_le32(pb, asf->seqno);//sequence number
256
    put_le16(pb, flags); /* unknown bytes */
257
    put_le16(pb, length);    //size_confirm
258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483
    asf->seqno++;
}

/* convert from unix to windows time */
static int64_t unix_to_file_time(int ti)
{
    int64_t t;

    t = ti * int64_t_C(10000000);
    t += int64_t_C(116444736000000000);
    return t;
}

/* write the header (used two times if non streamed) */
static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size)
{
    ASFContext *asf = s->priv_data;
    ByteIOContext *pb = &s->pb;
    int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
    int has_title;
    AVCodecContext *enc;
    int64_t header_offset, cur_pos, hpos;
    int bit_rate;

    has_title = (s->title[0] || s->author[0] || s->copyright[0] || s->comment[0]);

    bit_rate = 0;
    for(n=0;n<s->nb_streams;n++) {
        enc = &s->streams[n]->codec;

        bit_rate += enc->bit_rate;
    }

    if (asf->is_streamed) {
        put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
    }

    put_guid(pb, &asf_header);
    put_le64(pb, -1); /* header length, will be patched after */
    put_le32(pb, 3 + has_title + s->nb_streams); /* number of chunks in header */
    put_byte(pb, 1); /* ??? */
    put_byte(pb, 2); /* ??? */

    /* file header */
    header_offset = url_ftell(pb);
    hpos = put_header(pb, &file_header);
    put_guid(pb, &my_guid);
    put_le64(pb, file_size);
    file_time = 0;
    put_le64(pb, unix_to_file_time(file_time));
    put_le64(pb, asf->nb_packets); /* number of packets */
    put_le64(pb, asf->duration); /* end time stamp (in 100ns units) */
    put_le64(pb, asf->duration); /* duration (in 100ns units) */
    put_le32(pb, 0); /* start time stamp */
    put_le32(pb, 0); /* ??? */
    put_le32(pb, asf->is_streamed ? 1 : 0); /* ??? */
    put_le32(pb, asf->packet_size); /* packet size */
    put_le32(pb, asf->packet_size); /* packet size */
    put_le32(pb, bit_rate); /* Nominal data rate in bps */
    end_header(pb, hpos);

    /* unknown headers */
    hpos = put_header(pb, &head1_guid);
    put_guid(pb, &head2_guid);
    put_le32(pb, 6);
    put_le16(pb, 0);
    end_header(pb, hpos);

    /* title and other infos */
    if (has_title) {
        hpos = put_header(pb, &comment_header);
        put_le16(pb, 2 * (strlen(s->title) + 1));
        put_le16(pb, 2 * (strlen(s->author) + 1));
        put_le16(pb, 2 * (strlen(s->copyright) + 1));
        put_le16(pb, 2 * (strlen(s->comment) + 1));
        put_le16(pb, 0);
        put_str16_nolen(pb, s->title);
        put_str16_nolen(pb, s->author);
        put_str16_nolen(pb, s->copyright);
        put_str16_nolen(pb, s->comment);
        end_header(pb, hpos);
    }

    /* stream headers */
    for(n=0;n<s->nb_streams;n++) {
        int64_t es_pos;
        //        ASFStream *stream = &asf->streams[n];

        enc = &s->streams[n]->codec;
        asf->streams[n].num = n + 1;
        asf->streams[n].seq = 0;

        switch(enc->codec_type) {
        case CODEC_TYPE_AUDIO:
            wav_extra_size = 0;
            extra_size = 18 + wav_extra_size;
            extra_size2 = 0;
            break;
        default:
        case CODEC_TYPE_VIDEO:
            wav_extra_size = 0;
            extra_size = 0x33;
            extra_size2 = 0;
            break;
        }

        hpos = put_header(pb, &stream_header);
        if (enc->codec_type == CODEC_TYPE_AUDIO) {
            put_guid(pb, &audio_stream);
            put_guid(pb, &audio_conceal_none);
        } else {
            put_guid(pb, &video_stream);
            put_guid(pb, &video_conceal_none);
        }
        put_le64(pb, 0); /* ??? */
        es_pos = url_ftell(pb);
        put_le32(pb, extra_size); /* wav header len */
        put_le32(pb, extra_size2); /* additional data len */
        put_le16(pb, n + 1); /* stream number */
        put_le32(pb, 0); /* ??? */

        if (enc->codec_type == CODEC_TYPE_AUDIO) {
            /* WAVEFORMATEX header */
            int wavsize = put_wav_header(pb, enc);

            if (wavsize < 0)
                return -1;
            if (wavsize != extra_size) {
                cur_pos = url_ftell(pb);
                url_fseek(pb, es_pos, SEEK_SET);
                put_le32(pb, wavsize); /* wav header len */
                url_fseek(pb, cur_pos, SEEK_SET);
            }
        } else {
            put_le32(pb, enc->width);
            put_le32(pb, enc->height);
            put_byte(pb, 2); /* ??? */
            put_le16(pb, 40); /* size */

            /* BITMAPINFOHEADER header */
            put_bmp_header(pb, enc, codec_bmp_tags, 1);
        }
        end_header(pb, hpos);
    }

    /* media comments */

    hpos = put_header(pb, &codec_comment_header);
    put_guid(pb, &codec_comment1_header);
    put_le32(pb, s->nb_streams);
    for(n=0;n<s->nb_streams;n++) {
        AVCodec *p;

        enc = &s->streams[n]->codec;
        p = avcodec_find_encoder(enc->codec_id);

        put_le16(pb, asf->streams[n].num);
        put_str16(pb, p ? p->name : enc->codec_name);
        put_le16(pb, 0); /* no parameters */
        
        
        /* id */
        if (enc->codec_type == CODEC_TYPE_AUDIO) {
            put_le16(pb, 2);
            if(!enc->codec_tag)
                enc->codec_tag = codec_get_tag(codec_wav_tags, enc->codec_id);
            if(!enc->codec_tag)
                return -1;
            put_le16(pb, enc->codec_tag);
        } else {
            put_le16(pb, 4);
            if(!enc->codec_tag)
                enc->codec_tag = codec_get_tag(codec_bmp_tags, enc->codec_id);
            if(!enc->codec_tag)
                return -1;
            put_le32(pb, enc->codec_tag);
        }
    }
    end_header(pb, hpos);

    /* patch the header size fields */

    cur_pos = url_ftell(pb);
    header_size = cur_pos - header_offset;
    if (asf->is_streamed) {
        header_size += 8 + 30 + 50;

        url_fseek(pb, header_offset - 10 - 30, SEEK_SET);
        put_le16(pb, header_size);
        url_fseek(pb, header_offset - 2 - 30, SEEK_SET);
        put_le16(pb, header_size);

        header_size -= 8 + 30 + 50;
    }
    header_size += 24 + 6;
    url_fseek(pb, header_offset - 14, SEEK_SET);
    put_le64(pb, header_size);
    url_fseek(pb, cur_pos, SEEK_SET);

    /* movie chunk, followed by packets of packet_size */
    asf->data_offset = cur_pos;
    put_guid(pb, &data_header);
    put_le64(pb, data_chunk_size);
    put_guid(pb, &my_guid);
    put_le64(pb, asf->nb_packets); /* nb packets */
    put_byte(pb, 1); /* ??? */
    put_byte(pb, 1); /* ??? */
    return 0;
}

static int asf_write_header(AVFormatContext *s)
{
    ASFContext *asf = s->priv_data;

    av_set_pts_info(s, 32, 1, 1000); /* 32 bit pts in ms */

    asf->packet_size = PACKET_SIZE;
    asf->nb_packets = 0;

    if (asf_write_header1(s, 0, 50) < 0) {
        //av_free(asf);
        return -1;
    }

    put_flush_packet(&s->pb);

484 485
    asf->packet_nb_payloads = 0;
    asf->prev_packet_sent_time = 0;
486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502
    asf->packet_timestamp_start = -1;
    asf->packet_timestamp_end = -1;
    init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
                  NULL, NULL, NULL, NULL);

    return 0;
}

static int asf_write_stream_header(AVFormatContext *s)
{
    ASFContext *asf = s->priv_data;

    asf->is_streamed = 1;

    return asf_write_header(s);
}

503 504 505 506 507 508 509
static int put_payload_parsing_info(
                                AVFormatContext *s,
                                unsigned int    sendtime, 
                                unsigned int    duration,
                                int             nb_payloads, 
                                int             padsize
            )
510 511 512
{
    ASFContext *asf = s->priv_data;
    ByteIOContext *pb = &s->pb;
513 514 515 516 517 518 519 520
    int ppi_size, i;
    unsigned char *start_ppi_ptr = pb->buf_ptr;

    int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS;
  
    put_byte(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS);
    for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++){
        put_byte(pb, 0x0);
521 522
    }

523 524
    if (asf->multi_payloads_present)
        iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT;
525 526 527

    if (padsize > 0) {
        if (padsize < 256)
528
            iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE;
529
        else
530
            iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD;
531
    }
532 533 534 535 536
    put_byte(pb, iLengthTypeFlags);

    put_byte(pb, ASF_PPI_PROPERTY_FLAGS);

    if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD)
537
        put_le16(pb, padsize - 2);
538
    if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE)
539
        put_byte(pb, padsize - 1);
540 541

    put_le32(pb, sendtime);
542
    put_le16(pb, duration);
543 544 545 546
    if (asf->multi_payloads_present)
        put_byte(pb, nb_payloads | ASF_PAYLOAD_FLAGS);

    ppi_size = pb->buf_ptr - start_ppi_ptr;
547

548
    return ppi_size;
549 550 551 552 553
}

static void flush_packet(AVFormatContext *s)
{
    ASFContext *asf = s->priv_data;
554
    int packet_hdr_size, packet_filled_size;
555

556 557 558 559 560 561 562 563 564 565 566
    if (asf->is_streamed) {
        put_chunk(s, 0x4424, asf->packet_size, 0);
    }

    packet_hdr_size = put_payload_parsing_info(
                            s,
                            asf->packet_timestamp_start,
                            asf->packet_timestamp_end - asf->packet_timestamp_start,
                            asf->packet_nb_payloads,
                            asf->packet_size_left
                        );
567

568 569
    packet_filled_size = PACKET_SIZE - packet_hdr_size - asf->packet_size_left;
    memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left);
570

571
    put_buffer(&s->pb, asf->packet_buf, asf->packet_size - packet_hdr_size);
572 573 574

    put_flush_packet(&s->pb);
    asf->nb_packets++;
575 576
    asf->packet_nb_payloads = 0;
    asf->prev_packet_sent_time = asf->packet_timestamp_start;
577 578 579 580 581 582
    asf->packet_timestamp_start = -1;
    asf->packet_timestamp_end = -1;
    init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
                  NULL, NULL, NULL, NULL);
}

583 584 585 586 587 588 589 590
static void put_payload_header(
                                AVFormatContext *s,
                                ASFStream       *stream,
                                int             presentation_time,
                                int             m_obj_size,
                                int             m_obj_offset,
                                int             payload_len
            )
591 592 593 594
{
    ASFContext *asf = s->priv_data;
    ByteIOContext *pb = &asf->pb;
    int val;
595
    
596
    val = stream->num;
597 598
    if (s->streams[val - 1]->codec.coded_frame->key_frame)
        val |= ASF_PL_FLAG_KEY_FRAME;
599
    put_byte(pb, val);
600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616
        
    put_byte(pb, stream->seq);  //Media object number
    put_le32(pb, m_obj_offset); //Offset Into Media Object
         
    // Replicated Data shall be at least 8 bytes long.
    // The first 4 bytes of data shall contain the 
    // Size of the Media Object that the payload belongs to.
    // The next 4 bytes of data shall contain the 
    // Presentation Time for the media object that the payload belongs to.
    put_byte(pb, ASF_PAYLOAD_REPLICATED_DATA_LENGTH);

    put_le32(pb, m_obj_size);       //Replicated Data - Media Object Size
    put_le32(pb, presentation_time);//Replicated Data - Presentation Time
    
    if (asf->multi_payloads_present){
        put_le16(pb, payload_len);   //payload length
    }
617 618
}

619 620 621 622 623 624 625
static void put_frame(
                    AVFormatContext *s,
                    ASFStream       *stream,
		    int             timestamp,
                    const uint8_t   *buf,
		    int             m_obj_size
		)
626 627
{
    ASFContext *asf = s->priv_data;
628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652
    int m_obj_offset, payload_len, frag_len1;

    m_obj_offset = 0;
    while (m_obj_offset < m_obj_size) {
        payload_len = m_obj_size - m_obj_offset;
        if (asf->packet_timestamp_start == -1) {
            asf->multi_payloads_present = (payload_len < MULTI_PAYLOAD_CONSTANT);
            
            if (asf->multi_payloads_present){
                asf->packet_size_left = PACKET_SIZE; //For debug
                asf->packet_size_left = PACKET_SIZE - PACKET_HEADER_MIN_SIZE - 1;
                frag_len1 = MULTI_PAYLOAD_CONSTANT - 1;
            }
            else {
                asf->packet_size_left = PACKET_SIZE - PACKET_HEADER_MIN_SIZE;
                frag_len1 = SINGLE_PAYLOAD_DATA_LENGTH;
            }
            if (asf->prev_packet_sent_time > timestamp)
                asf->packet_timestamp_start = asf->prev_packet_sent_time;
            else
                asf->packet_timestamp_start = timestamp;
        }
        else {
            // multi payloads
            frag_len1 = asf->packet_size_left - PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS;
653

654 655 656 657 658
            if (asf->prev_packet_sent_time > timestamp)
                asf->packet_timestamp_start = asf->prev_packet_sent_time;
            else if (asf->packet_timestamp_start >= timestamp)
                asf->packet_timestamp_start = timestamp;
        }
659
        if (frag_len1 > 0) {
660 661 662 663 664 665 666 667 668 669 670 671
            if (payload_len > frag_len1)
                payload_len = frag_len1;
            else if (payload_len == (frag_len1 - 1))
                payload_len = frag_len1 - 2;  //additional byte need to put padding length
            
            put_payload_header(s, stream, timestamp+preroll_time, m_obj_size, m_obj_offset, payload_len);
            put_buffer(&asf->pb, buf, payload_len);

            if (asf->multi_payloads_present)
                asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS);
            else
                asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD);
672
            asf->packet_timestamp_end = timestamp;
673 674
            
            asf->packet_nb_payloads++;
675
        } else {
676
            payload_len = 0;
677
        }
678 679 680 681 682 683
        m_obj_offset += payload_len;
        buf += payload_len;

        if (!asf->multi_payloads_present)
            flush_packet(s);
        else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + 1))
684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768
            flush_packet(s);
    }
    stream->seq++;
}

static int asf_write_packet(AVFormatContext *s, int stream_index,
                            const uint8_t *buf, int size, int64_t timestamp)
{
    ASFContext *asf = s->priv_data;
    ASFStream *stream;
    int64_t duration;
    AVCodecContext *codec;

    codec = &s->streams[stream_index]->codec;
    stream = &asf->streams[stream_index];

    if (codec->codec_type == CODEC_TYPE_AUDIO) {
        duration = (codec->frame_number * codec->frame_size * int64_t_C(10000000)) /
            codec->sample_rate;
    } else {
        duration = av_rescale(codec->frame_number * codec->frame_rate_base, 10000000, codec->frame_rate);
    }
    if (duration > asf->duration)
        asf->duration = duration;

    put_frame(s, stream, timestamp, buf, size);
    return 0;
}

static int asf_write_trailer(AVFormatContext *s)
{
    ASFContext *asf = s->priv_data;
    int64_t file_size;

    /* flush the current packet */
    if (asf->pb.buf_ptr > asf->pb.buffer)
        flush_packet(s);

    if (asf->is_streamed) {
        put_chunk(s, 0x4524, 0, 0); /* end of stream */
    } else {
        /* rewrite an updated header */
        file_size = url_ftell(&s->pb);
        url_fseek(&s->pb, 0, SEEK_SET);
        asf_write_header1(s, file_size, file_size - asf->data_offset);
    }

    put_flush_packet(&s->pb);
    return 0;
}

AVOutputFormat asf_oformat = {
    "asf",
    "asf format",
    "video/x-ms-asf",
    "asf,wmv",
    sizeof(ASFContext),
#ifdef CONFIG_MP3LAME
    CODEC_ID_MP3,
#else
    CODEC_ID_MP2,
#endif
    CODEC_ID_MSMPEG4V3,
    asf_write_header,
    asf_write_packet,
    asf_write_trailer,
};

AVOutputFormat asf_stream_oformat = {
    "asf_stream",
    "asf format",
    "video/x-ms-asf",
    "asf,wmv",
    sizeof(ASFContext),
#ifdef CONFIG_MP3LAME
    CODEC_ID_MP3,
#else
    CODEC_ID_MP2,
#endif
    CODEC_ID_MSMPEG4V3,
    asf_write_stream_header,
    asf_write_packet,
    asf_write_trailer,
};
#endif //CONFIG_ENCODERS