libavformat/rtmppkt.c

   1 /*
   2  * RTMP input format
   3  * Copyright (c) 2009 Konstantin Shishkov
   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
  22 #include "libavcodec/bytestream.h"
  23 #include "libavutil/avstring.h"
  24 #include "libavutil/intfloat.h"
  25 #include "avformat.h"
  26
  27 #include "rtmppkt.h"
  28 #include "flv.h"
  29 #include "url.h"
  30
  31 void ff_amf_write_bool(uint8_t **dst, int val)
  32 {
  33     bytestream_put_byte(dst, AMF_DATA_TYPE_BOOL);
  34     bytestream_put_byte(dst, val);
  35 }
  36
  37 void ff_amf_write_number(uint8_t **dst, double val)
  38 {
  39     bytestream_put_byte(dst, AMF_DATA_TYPE_NUMBER);
  40     bytestream_put_be64(dst, av_double2int(val));
  41 }
  42
  43 void ff_amf_write_string(uint8_t **dst, const char *str)
  44 {
  45     bytestream_put_byte(dst, AMF_DATA_TYPE_STRING);
  46     bytestream_put_be16(dst, strlen(str));
  47     bytestream_put_buffer(dst, str, strlen(str));
  48 }
  49
  50 void ff_amf_write_string2(uint8_t **dst, const char *str1, const char *str2)
  51 {
  52     int len1 = 0, len2 = 0;
  53     if (str1)
  54         len1 = strlen(str1);
  55     if (str2)
  56         len2 = strlen(str2);
  57     bytestream_put_byte(dst, AMF_DATA_TYPE_STRING);
  58     bytestream_put_be16(dst, len1 + len2);
  59     bytestream_put_buffer(dst, str1, len1);
  60     bytestream_put_buffer(dst, str2, len2);
  61 }
  62
  63 void ff_amf_write_null(uint8_t **dst)
  64 {
  65     bytestream_put_byte(dst, AMF_DATA_TYPE_NULL);
  66 }
  67
  68 void ff_amf_write_object_start(uint8_t **dst)
  69 {
  70     bytestream_put_byte(dst, AMF_DATA_TYPE_OBJECT);
  71 }
  72
  73 void ff_amf_write_field_name(uint8_t **dst, const char *str)
  74 {
  75     bytestream_put_be16(dst, strlen(str));
  76     bytestream_put_buffer(dst, str, strlen(str));
  77 }
  78
  79 void ff_amf_write_object_end(uint8_t **dst)
  80 {
  81     /* first two bytes are field name length = 0,
  82      * AMF object should end with it and end marker
  83      */
  84     bytestream_put_be24(dst, AMF_DATA_TYPE_OBJECT_END);
  85 }
  86
  87 int ff_amf_read_bool(GetByteContext *bc, int *val)
  88 {
  89     if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_BOOL)
  90         return AVERROR_INVALIDDATA;
  91     *val = bytestream2_get_byte(bc);
  92     return 0;
  93 }
  94
  95 int ff_amf_read_number(GetByteContext *bc, double *val)
  96 {
  97     uint64_t read;
  98     if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_NUMBER)
  99         return AVERROR_INVALIDDATA;
 100     read = bytestream2_get_be64(bc);
 101     *val = av_int2double(read);
 102     return 0;
 103 }
 104
 105 int ff_amf_get_string(GetByteContext *bc, uint8_t *str,
 106                       int strsize, int *length)
 107 {
 108     int stringlen = 0;
 109     int readsize;
 110     stringlen = bytestream2_get_be16(bc);
 111     if (stringlen + 1 > strsize)
 112         return AVERROR(EINVAL);
 113     readsize = bytestream2_get_buffer(bc, str, stringlen);
 114     if (readsize != stringlen) {
 115         av_log(NULL, AV_LOG_WARNING,
 116                "Unable to read as many bytes as AMF string signaled\n");
 117     }
 118     str[readsize] = '\0';
 119     *length = FFMIN(stringlen, readsize);
 120     return 0;
 121 }
 122
 123 int ff_amf_read_string(GetByteContext *bc, uint8_t *str,
 124                        int strsize, int *length)
 125 {
 126     if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_STRING)
 127         return AVERROR_INVALIDDATA;
 128     return ff_amf_get_string(bc, str, strsize, length);
 129 }
 130
 131 int ff_amf_read_null(GetByteContext *bc)
 132 {
 133     if (bytestream2_get_byte(bc) != AMF_DATA_TYPE_NULL)
 134         return AVERROR_INVALIDDATA;
 135     return 0;
 136 }
 137
 138 int ff_rtmp_check_alloc_array(RTMPPacket **prev_pkt, int *nb_prev_pkt,
 139                               int channel)
 140 {
 141     int nb_alloc;
 142     RTMPPacket *ptr;
 143     if (channel < *nb_prev_pkt)
 144         return 0;
 145
 146     nb_alloc = channel + 16;
 147     // This can't use the av_reallocp family of functions, since we
 148     // would need to free each element in the array before the array
 149     // itself is freed.
 150     ptr = av_realloc_array(*prev_pkt, nb_alloc, sizeof(**prev_pkt));
 151     if (!ptr)
 152         return AVERROR(ENOMEM);
 153     memset(ptr + *nb_prev_pkt, 0, (nb_alloc - *nb_prev_pkt) * sizeof(*ptr));
 154     *prev_pkt = ptr;
 155     *nb_prev_pkt = nb_alloc;
 156     return 0;
 157 }
 158
 159 int ff_rtmp_packet_read(URLContext *h, RTMPPacket *p,
 160                         int chunk_size, RTMPPacket **prev_pkt, int *nb_prev_pkt)
 161 {
 162     uint8_t hdr;
 163
 164     if (ffurl_read(h, &hdr, 1) != 1)
 165         return AVERROR(EIO);
 166
 167     return ff_rtmp_packet_read_internal(h, p, chunk_size, prev_pkt,
 168                                         nb_prev_pkt, hdr);
 169 }
 170
 171 static int rtmp_packet_read_one_chunk(URLContext *h, RTMPPacket *p,
 172                                       int chunk_size, RTMPPacket **prev_pkt_ptr,
 173                                       int *nb_prev_pkt, uint8_t hdr)
 174 {
 175
 176     uint8_t buf[16];
 177     int channel_id, timestamp, size;
 178     uint32_t ts_field; // non-extended timestamp or delta field
 179     uint32_t extra = 0;
 180     enum RTMPPacketType type;
 181     int written = 0;
 182     int ret, toread;
 183     RTMPPacket *prev_pkt;
 184
 185     written++;
 186     channel_id = hdr & 0x3F;
 187
 188     if (channel_id < 2) { //special case for channel number >= 64
 189         buf[1] = 0;
 190         if (ffurl_read_complete(h, buf, channel_id + 1) != channel_id + 1)
 191             return AVERROR(EIO);
 192         written += channel_id + 1;
 193         channel_id = AV_RL16(buf) + 64;
 194     }
 195     if ((ret = ff_rtmp_check_alloc_array(prev_pkt_ptr, nb_prev_pkt,
 196                                          channel_id)) < 0)
 197         return ret;
 198     prev_pkt = *prev_pkt_ptr;
 199     size  = prev_pkt[channel_id].size;
 200     type  = prev_pkt[channel_id].type;
 201     extra = prev_pkt[channel_id].extra;
 202
 203     hdr >>= 6; // header size indicator
 204     if (hdr == RTMP_PS_ONEBYTE) {
 205         ts_field = prev_pkt[channel_id].ts_field;
 206     } else {
 207         if (ffurl_read_complete(h, buf, 3) != 3)
 208             return AVERROR(EIO);
 209         written += 3;
 210         ts_field = AV_RB24(buf);
 211         if (hdr != RTMP_PS_FOURBYTES) {
 212             if (ffurl_read_complete(h, buf, 3) != 3)
 213                 return AVERROR(EIO);
 214             written += 3;
 215             size = AV_RB24(buf);
 216             if (ffurl_read_complete(h, buf, 1) != 1)
 217                 return AVERROR(EIO);
 218             written++;
 219             type = buf[0];
 220             if (hdr == RTMP_PS_TWELVEBYTES) {
 221                 if (ffurl_read_complete(h, buf, 4) != 4)
 222                     return AVERROR(EIO);
 223                 written += 4;
 224                 extra = AV_RL32(buf);
 225             }
 226         }
 227     }
 228     if (ts_field == 0xFFFFFF) {
 229         if (ffurl_read_complete(h, buf, 4) != 4)
 230             return AVERROR(EIO);
 231         timestamp = AV_RB32(buf);
 232     } else {
 233         timestamp = ts_field;
 234     }
 235     if (hdr != RTMP_PS_TWELVEBYTES)
 236         timestamp += prev_pkt[channel_id].timestamp;
 237
 238     if (prev_pkt[channel_id].read && size != prev_pkt[channel_id].size) {
 239         av_log(h, AV_LOG_ERROR, "RTMP packet size mismatch %d != %d\n",
 240                                 size, prev_pkt[channel_id].size);
 241         ff_rtmp_packet_destroy(&prev_pkt[channel_id]);
 242         prev_pkt[channel_id].read = 0;
 243         return AVERROR_INVALIDDATA;
 244     }
 245
 246     if (!prev_pkt[channel_id].read) {
 247         if ((ret = ff_rtmp_packet_create(p, channel_id, type, timestamp,
 248                                          size)) < 0)
 249             return ret;
 250         p->read = written;
 251         p->offset = 0;
 252         prev_pkt[channel_id].ts_field   = ts_field;
 253         prev_pkt[channel_id].timestamp  = timestamp;
 254     } else {
 255         // previous packet in this channel hasn't completed reading
 256         RTMPPacket *prev = &prev_pkt[channel_id];
 257         p->data          = prev->data;
 258         p->size          = prev->size;
 259         p->channel_id    = prev->channel_id;
 260         p->type          = prev->type;
 261         p->ts_field      = prev->ts_field;
 262         p->extra         = prev->extra;
 263         p->offset        = prev->offset;
 264         p->read          = prev->read + written;
 265         p->timestamp     = prev->timestamp;
 266         prev->data       = NULL;
 267     }
 268     p->extra = extra;
 269     // save history
 270     prev_pkt[channel_id].channel_id = channel_id;
 271     prev_pkt[channel_id].type       = type;
 272     prev_pkt[channel_id].size       = size;
 273     prev_pkt[channel_id].extra      = extra;
 274     size = size - p->offset;
 275
 276     toread = FFMIN(size, chunk_size);
 277     if (ffurl_read_complete(h, p->data + p->offset, toread) != toread) {
 278         ff_rtmp_packet_destroy(p);
 279         return AVERROR(EIO);
 280     }
 281     size      -= toread;
 282     p->read   += toread;
 283     p->offset += toread;
 284
 285     if (size > 0) {
 286        RTMPPacket *prev = &prev_pkt[channel_id];
 287        prev->data = p->data;
 288        prev->read = p->read;
 289        prev->offset = p->offset;
 290        p->data      = NULL;
 291        return AVERROR(EAGAIN);
 292     }
 293
 294     prev_pkt[channel_id].read = 0; // read complete; reset if needed
 295     return p->read;
 296 }
 297
 298 int ff_rtmp_packet_read_internal(URLContext *h, RTMPPacket *p, int chunk_size,
 299                                  RTMPPacket **prev_pkt, int *nb_prev_pkt,
 300                                  uint8_t hdr)
 301 {
 302     while (1) {
 303         int ret = rtmp_packet_read_one_chunk(h, p, chunk_size, prev_pkt,
 304                                              nb_prev_pkt, hdr);
 305         if (ret > 0 || ret != AVERROR(EAGAIN))
 306             return ret;
 307
 308         if (ffurl_read(h, &hdr, 1) != 1)
 309             return AVERROR(EIO);
 310     }
 311 }
 312
 313 int ff_rtmp_packet_write(URLContext *h, RTMPPacket *pkt,
 314                          int chunk_size, RTMPPacket **prev_pkt_ptr,
 315                          int *nb_prev_pkt)
 316 {
 317     uint8_t pkt_hdr[16], *p = pkt_hdr;
 318     int mode = RTMP_PS_TWELVEBYTES;
 319     int off = 0;
 320     int written = 0;
 321     int ret;
 322     RTMPPacket *prev_pkt;
 323     int use_delta; // flag if using timestamp delta, not RTMP_PS_TWELVEBYTES
 324     uint32_t timestamp; // full 32-bit timestamp or delta value
 325
 326     if ((ret = ff_rtmp_check_alloc_array(prev_pkt_ptr, nb_prev_pkt,
 327                                          pkt->channel_id)) < 0)
 328         return ret;
 329     prev_pkt = *prev_pkt_ptr;
 330
 331     //if channel_id = 0, this is first presentation of prev_pkt, send full hdr.
 332     use_delta = prev_pkt[pkt->channel_id].channel_id &&
 333         pkt->extra == prev_pkt[pkt->channel_id].extra &&
 334         pkt->timestamp >= prev_pkt[pkt->channel_id].timestamp;
 335
 336     timestamp = pkt->timestamp;
 337     if (use_delta) {
 338         timestamp -= prev_pkt[pkt->channel_id].timestamp;
 339     }
 340     if (timestamp >= 0xFFFFFF) {
 341         pkt->ts_field = 0xFFFFFF;
 342     } else {
 343         pkt->ts_field = timestamp;
 344     }
 345
 346     if (use_delta) {
 347         if (pkt->type == prev_pkt[pkt->channel_id].type &&
 348             pkt->size == prev_pkt[pkt->channel_id].size) {
 349             mode = RTMP_PS_FOURBYTES;
 350             if (pkt->ts_field == prev_pkt[pkt->channel_id].ts_field)
 351                 mode = RTMP_PS_ONEBYTE;
 352         } else {
 353             mode = RTMP_PS_EIGHTBYTES;
 354         }
 355     }
 356
 357     if (pkt->channel_id < 64) {
 358         bytestream_put_byte(&p, pkt->channel_id | (mode << 6));
 359     } else if (pkt->channel_id < 64 + 256) {
 360         bytestream_put_byte(&p, 0               | (mode << 6));
 361         bytestream_put_byte(&p, pkt->channel_id - 64);
 362     } else {
 363         bytestream_put_byte(&p, 1               | (mode << 6));
 364         bytestream_put_le16(&p, pkt->channel_id - 64);
 365     }
 366     if (mode != RTMP_PS_ONEBYTE) {
 367         bytestream_put_be24(&p, pkt->ts_field);
 368         if (mode != RTMP_PS_FOURBYTES) {
 369             bytestream_put_be24(&p, pkt->size);
 370             bytestream_put_byte(&p, pkt->type);
 371             if (mode == RTMP_PS_TWELVEBYTES)
 372                 bytestream_put_le32(&p, pkt->extra);
 373         }
 374     }
 375     if (pkt->ts_field == 0xFFFFFF)
 376         bytestream_put_be32(&p, timestamp);
 377     // save history
 378     prev_pkt[pkt->channel_id].channel_id = pkt->channel_id;
 379     prev_pkt[pkt->channel_id].type       = pkt->type;
 380     prev_pkt[pkt->channel_id].size       = pkt->size;
 381     prev_pkt[pkt->channel_id].timestamp  = pkt->timestamp;
 382     prev_pkt[pkt->channel_id].ts_field   = pkt->ts_field;
 383     prev_pkt[pkt->channel_id].extra      = pkt->extra;
 384
 385     if ((ret = ffurl_write(h, pkt_hdr, p - pkt_hdr)) < 0)
 386         return ret;
 387     written = p - pkt_hdr + pkt->size;
 388     while (off < pkt->size) {
 389         int towrite = FFMIN(chunk_size, pkt->size - off);
 390         if ((ret = ffurl_write(h, pkt->data + off, towrite)) < 0)
 391             return ret;
 392         off += towrite;
 393         if (off < pkt->size) {
 394             uint8_t marker = 0xC0 | pkt->channel_id;
 395             if ((ret = ffurl_write(h, &marker, 1)) < 0)
 396                 return ret;
 397             written++;
 398             if (pkt->ts_field == 0xFFFFFF) {
 399                 uint8_t ts_header[4];
 400                 AV_WB32(ts_header, timestamp);
 401                 if ((ret = ffurl_write(h, ts_header, 4)) < 0)
 402                     return ret;
 403                 written += 4;
 404             }
 405         }
 406     }
 407     return written;
 408 }
 409
 410 int ff_rtmp_packet_create(RTMPPacket *pkt, int channel_id, RTMPPacketType type,
 411                           int timestamp, int size)
 412 {
 413     if (size) {
 414         pkt->data = av_realloc(NULL, size);
 415         if (!pkt->data)
 416             return AVERROR(ENOMEM);
 417     }
 418     pkt->size       = size;
 419     pkt->channel_id = channel_id;
 420     pkt->type       = type;
 421     pkt->timestamp  = timestamp;
 422     pkt->extra      = 0;
 423     pkt->ts_field   = 0;
 424
 425     return 0;
 426 }
 427
 428 void ff_rtmp_packet_destroy(RTMPPacket *pkt)
 429 {
 430     if (!pkt)
 431         return;
 432     av_freep(&pkt->data);
 433     pkt->size = 0;
 434 }
 435
 436 static int amf_tag_skip(GetByteContext *gb)
 437 {
 438     AMFDataType type;
 439     unsigned nb   = -1;
 440
 441     if (bytestream2_get_bytes_left(gb) < 1)
 442         return -1;
 443
 444     type = bytestream2_get_byte(gb);
 445     switch (type) {
 446     case AMF_DATA_TYPE_NUMBER:
 447         bytestream2_get_be64(gb);
 448         return 0;
 449     case AMF_DATA_TYPE_BOOL:
 450         bytestream2_get_byte(gb);
 451         return 0;
 452     case AMF_DATA_TYPE_STRING:
 453         bytestream2_skip(gb, bytestream2_get_be16(gb));
 454         return 0;
 455     case AMF_DATA_TYPE_LONG_STRING:
 456         bytestream2_skip(gb, bytestream2_get_be32(gb));
 457         return 0;
 458     case AMF_DATA_TYPE_NULL:
 459         return 0;
 460     case AMF_DATA_TYPE_DATE:
 461         bytestream2_skip(gb, 10);
 462         return 0;
 463     case AMF_DATA_TYPE_ARRAY:
 464     case AMF_DATA_TYPE_MIXEDARRAY:
 465         nb = bytestream2_get_be32(gb);
 466     case AMF_DATA_TYPE_OBJECT:
 467         while (type != AMF_DATA_TYPE_ARRAY || nb-- > 0) {
 468             int t;
 469             if (type != AMF_DATA_TYPE_ARRAY) {
 470                 int size = bytestream2_get_be16(gb);
 471                 if (!size) {
 472                     bytestream2_get_byte(gb);
 473                     break;
 474                 }
 475                 if (size < 0 || size >= bytestream2_get_bytes_left(gb))
 476                     return -1;
 477                 bytestream2_skip(gb, size);
 478             }
 479             t = amf_tag_skip(gb);
 480             if (t < 0 || bytestream2_get_bytes_left(gb) <= 0)
 481                 return -1;
 482         }
 483         return 0;
 484     case AMF_DATA_TYPE_OBJECT_END:  return 0;
 485     default:                        return -1;
 486     }
 487 }
 488
 489 int ff_amf_tag_size(const uint8_t *data, const uint8_t *data_end)
 490 {
 491     GetByteContext gb;
 492     int ret;
 493
 494     if (data >= data_end)
 495         return -1;
 496
 497     bytestream2_init(&gb, data, data_end - data);
 498
 499     ret = amf_tag_skip(&gb);
 500     if (ret < 0 || bytestream2_get_bytes_left(&gb) <= 0)
 501         return -1;
 502     av_assert0(bytestream2_tell(&gb) >= 0 && bytestream2_tell(&gb) <= data_end - data);
 503     return bytestream2_tell(&gb);
 504 }
 505
 506 static int amf_get_field_value2(GetByteContext *gb,
 507                            const uint8_t *name, uint8_t *dst, int dst_size)
 508 {
 509     int namelen = strlen(name);
 510     int len;
 511
 512     while (bytestream2_peek_byte(gb) != AMF_DATA_TYPE_OBJECT && bytestream2_get_bytes_left(gb) > 0) {
 513         int ret = amf_tag_skip(gb);
 514         if (ret < 0)
 515             return -1;
 516     }
 517     if (bytestream2_get_bytes_left(gb) < 3)
 518         return -1;
 519     bytestream2_get_byte(gb);
 520
 521     for (;;) {
 522         int size = bytestream2_get_be16(gb);
 523         if (!size)
 524             break;
 525         if (size < 0 || size >= bytestream2_get_bytes_left(gb))
 526             return -1;
 527         bytestream2_skip(gb, size);
 528         if (size == namelen && !memcmp(gb->buffer-size, name, namelen)) {
 529             switch (bytestream2_get_byte(gb)) {
 530             case AMF_DATA_TYPE_NUMBER:
 531                 snprintf(dst, dst_size, "%g", av_int2double(bytestream2_get_be64(gb)));
 532                 break;
 533             case AMF_DATA_TYPE_BOOL:
 534                 snprintf(dst, dst_size, "%s", bytestream2_get_byte(gb) ? "true" : "false");
 535                 break;
 536             case AMF_DATA_TYPE_STRING:
 537                 len = bytestream2_get_be16(gb);
 538                 if (dst_size < 1)
 539                     return -1;
 540                 if (dst_size < len + 1)
 541                     len = dst_size - 1;
 542                 bytestream2_get_buffer(gb, dst, len);
 543                 dst[len] = 0;
 544                 break;
 545             default:
 546                 return -1;
 547             }
 548             return 0;
 549         }
 550         len = amf_tag_skip(gb);
 551         if (len < 0 || bytestream2_get_bytes_left(gb) <= 0)
 552             return -1;
 553     }
 554     return -1;
 555 }
 556
 557 int ff_amf_get_field_value(const uint8_t *data, const uint8_t *data_end,
 558                            const uint8_t *name, uint8_t *dst, int dst_size)
 559 {
 560     GetByteContext gb;
 561
 562     if (data >= data_end)
 563         return -1;
 564
 565     bytestream2_init(&gb, data, data_end - data);
 566
 567     return amf_get_field_value2(&gb, name, dst, dst_size);
 568 }
 569
 570 static const char* rtmp_packet_type(int type)
 571 {
 572     switch (type) {
 573     case RTMP_PT_CHUNK_SIZE:     return "chunk size";
 574     case RTMP_PT_BYTES_READ:     return "bytes read";
 575     case RTMP_PT_USER_CONTROL:   return "user control";
 576     case RTMP_PT_WINDOW_ACK_SIZE: return "window acknowledgement size";
 577     case RTMP_PT_SET_PEER_BW:    return "set peer bandwidth";
 578     case RTMP_PT_AUDIO:          return "audio packet";
 579     case RTMP_PT_VIDEO:          return "video packet";
 580     case RTMP_PT_FLEX_STREAM:    return "Flex shared stream";
 581     case RTMP_PT_FLEX_OBJECT:    return "Flex shared object";
 582     case RTMP_PT_FLEX_MESSAGE:   return "Flex shared message";
 583     case RTMP_PT_NOTIFY:         return "notification";
 584     case RTMP_PT_SHARED_OBJ:     return "shared object";
 585     case RTMP_PT_INVOKE:         return "invoke";
 586     case RTMP_PT_METADATA:       return "metadata";
 587     default:                     return "unknown";
 588     }
 589 }
 590
 591 static void amf_tag_contents(void *ctx, const uint8_t *data,
 592                              const uint8_t *data_end)
 593 {
 594     unsigned int size, nb = -1;
 595     char buf[1024];
 596     AMFDataType type;
 597     int parse_key = 1;
 598
 599     if (data >= data_end)
 600         return;
 601     switch ((type = *data++)) {
 602     case AMF_DATA_TYPE_NUMBER:
 603         av_log(ctx, AV_LOG_DEBUG, " number %g\n", av_int2double(AV_RB64(data)));
 604         return;
 605     case AMF_DATA_TYPE_BOOL:
 606         av_log(ctx, AV_LOG_DEBUG, " bool %d\n", *data);
 607         return;
 608     case AMF_DATA_TYPE_STRING:
 609     case AMF_DATA_TYPE_LONG_STRING:
 610         if (type == AMF_DATA_TYPE_STRING) {
 611             size = bytestream_get_be16(&data);
 612         } else {
 613             size = bytestream_get_be32(&data);
 614         }
 615         size = FFMIN(size, sizeof(buf) - 1);
 616         memcpy(buf, data, size);
 617         buf[size] = 0;
 618         av_log(ctx, AV_LOG_DEBUG, " string '%s'\n", buf);
 619         return;
 620     case AMF_DATA_TYPE_NULL:
 621         av_log(ctx, AV_LOG_DEBUG, " NULL\n");
 622         return;
 623     case AMF_DATA_TYPE_ARRAY:
 624         parse_key = 0;
 625     case AMF_DATA_TYPE_MIXEDARRAY:
 626         nb = bytestream_get_be32(&data);
 627     case AMF_DATA_TYPE_OBJECT:
 628         av_log(ctx, AV_LOG_DEBUG, " {\n");
 629         while (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY) {
 630             int t;
 631             if (parse_key) {
 632                 size = bytestream_get_be16(&data);
 633                 size = FFMIN(size, sizeof(buf) - 1);
 634                 if (!size) {
 635                     av_log(ctx, AV_LOG_DEBUG, " }\n");
 636                     data++;
 637                     break;
 638                 }
 639                 memcpy(buf, data, size);
 640                 buf[size] = 0;
 641                 if (size >= data_end - data)
 642                     return;
 643                 data += size;
 644                 av_log(ctx, AV_LOG_DEBUG, "  %s: ", buf);
 645             }
 646             amf_tag_contents(ctx, data, data_end);
 647             t = ff_amf_tag_size(data, data_end);
 648             if (t < 0 || t >= data_end - data)
 649                 return;
 650             data += t;
 651         }
 652         return;
 653     case AMF_DATA_TYPE_OBJECT_END:
 654         av_log(ctx, AV_LOG_DEBUG, " }\n");
 655         return;
 656     default:
 657         return;
 658     }
 659 }
 660
 661 void ff_rtmp_packet_dump(void *ctx, RTMPPacket *p)
 662 {
 663     av_log(ctx, AV_LOG_DEBUG, "RTMP packet type '%s'(%d) for channel %d, timestamp %d, extra field %d size %d\n",
 664            rtmp_packet_type(p->type), p->type, p->channel_id, p->timestamp, p->extra, p->size);
 665     if (p->type == RTMP_PT_INVOKE || p->type == RTMP_PT_NOTIFY) {
 666         uint8_t *src = p->data, *src_end = p->data + p->size;
 667         while (src < src_end) {
 668             int sz;
 669             amf_tag_contents(ctx, src, src_end);
 670             sz = ff_amf_tag_size(src, src_end);
 671             if (sz < 0)
 672                 break;
 673             src += sz;
 674         }
 675     } else if (p->type == RTMP_PT_WINDOW_ACK_SIZE) {
 676         av_log(ctx, AV_LOG_DEBUG, "Window acknowledgement size = %d\n", AV_RB32(p->data));
 677     } else if (p->type == RTMP_PT_SET_PEER_BW) {
 678         av_log(ctx, AV_LOG_DEBUG, "Set Peer BW = %d\n", AV_RB32(p->data));
 679     } else if (p->type != RTMP_PT_AUDIO && p->type != RTMP_PT_VIDEO && p->type != RTMP_PT_METADATA) {
 680         int i;
 681         for (i = 0; i < p->size; i++)
 682             av_log(ctx, AV_LOG_DEBUG, " %02X", p->data[i]);
 683         av_log(ctx, AV_LOG_DEBUG, "\n");
 684     }
 685 }
 686
 687 int ff_amf_match_string(const uint8_t *data, int size, const char *str)
 688 {
 689     int len = strlen(str);
 690     int amf_len, type;
 691
 692     if (size < 1)
 693         return 0;
 694
 695     type = *data++;
 696
 697     if (type != AMF_DATA_TYPE_LONG_STRING &&
 698         type != AMF_DATA_TYPE_STRING)
 699         return 0;
 700
 701     if (type == AMF_DATA_TYPE_LONG_STRING) {
 702         if ((size -= 4 + 1) < 0)
 703             return 0;
 704         amf_len = bytestream_get_be32(&data);
 705     } else {
 706         if ((size -= 2 + 1) < 0)
 707             return 0;
 708         amf_len = bytestream_get_be16(&data);
 709     }
 710
 711     if (amf_len > size)
 712         return 0;
 713
 714     if (amf_len != len)
 715         return 0;
 716
 717     return !memcmp(data, str, len);
 718 }