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FFmpeg/libavformat/rtp.c

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  1. /*

  2.  * RTP input/output format

  3.  * Copyright (c) 2002 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 "bitstream.h"

  23. 

  24. #include <unistd.h>

  25. #include "network.h"

  26. 

  27. #include "rtp_internal.h"

  28. 

  29. //#define DEBUG

  30. 

  31. /* from http://www.iana.org/assignments/rtp-parameters last updated 05 January 2005 */

  32. static const struct

  33. {

  34.     int pt;

  35.     const char enc_name[50]; /* XXX: why 50 ? */

  36.     enum CodecType codec_type;

  37.     enum CodecID codec_id;

  38.     int clock_rate;

  39.     int audio_channels;

  40. } AVRtpPayloadTypes[]=

  41. {

  42.   {0, "PCMU",        CODEC_TYPE_AUDIO,   CODEC_ID_PCM_MULAW, 8000, 1},

  43.   {1, "Reserved",    CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  44.   {2, "Reserved",    CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  45.   {3, "GSM",         CODEC_TYPE_AUDIO,   CODEC_ID_NONE, 8000, 1},

  46.   {4, "G723",        CODEC_TYPE_AUDIO,   CODEC_ID_NONE, 8000, 1},

  47.   {5, "DVI4",        CODEC_TYPE_AUDIO,   CODEC_ID_NONE, 8000, 1},

  48.   {6, "DVI4",        CODEC_TYPE_AUDIO,   CODEC_ID_NONE, 16000, 1},

  49.   {7, "LPC",         CODEC_TYPE_AUDIO,   CODEC_ID_NONE, 8000, 1},

  50.   {8, "PCMA",        CODEC_TYPE_AUDIO,   CODEC_ID_PCM_ALAW, 8000, 1},

  51.   {9, "G722",        CODEC_TYPE_AUDIO,   CODEC_ID_NONE, 8000, 1},

  52.   {10, "L16",        CODEC_TYPE_AUDIO,   CODEC_ID_PCM_S16BE, 44100, 2},

  53.   {11, "L16",        CODEC_TYPE_AUDIO,   CODEC_ID_PCM_S16BE, 44100, 1},

  54.   {12, "QCELP",      CODEC_TYPE_AUDIO,   CODEC_ID_QCELP, 8000, 1},

  55.   {13, "CN",         CODEC_TYPE_AUDIO,   CODEC_ID_NONE, 8000, 1},

  56.   {14, "MPA",        CODEC_TYPE_AUDIO,   CODEC_ID_MP2, 90000, -1},

  57.   {15, "G728",       CODEC_TYPE_AUDIO,   CODEC_ID_NONE, 8000, 1},

  58.   {16, "DVI4",       CODEC_TYPE_AUDIO,   CODEC_ID_NONE, 11025, 1},

  59.   {17, "DVI4",       CODEC_TYPE_AUDIO,   CODEC_ID_NONE, 22050, 1},

  60.   {18, "G729",       CODEC_TYPE_AUDIO,   CODEC_ID_NONE, 8000, 1},

  61.   {19, "reserved",   CODEC_TYPE_AUDIO,   CODEC_ID_NONE, -1, -1},

  62.   {20, "unassigned", CODEC_TYPE_AUDIO,   CODEC_ID_NONE, -1, -1},

  63.   {21, "unassigned", CODEC_TYPE_AUDIO,   CODEC_ID_NONE, -1, -1},

  64.   {22, "unassigned", CODEC_TYPE_AUDIO,   CODEC_ID_NONE, -1, -1},

  65.   {23, "unassigned", CODEC_TYPE_AUDIO,   CODEC_ID_NONE, -1, -1},

  66.   {24, "unassigned", CODEC_TYPE_VIDEO,   CODEC_ID_NONE, -1, -1},

  67.   {25, "CelB",       CODEC_TYPE_VIDEO,   CODEC_ID_NONE, 90000, -1},

  68.   {26, "JPEG",       CODEC_TYPE_VIDEO,   CODEC_ID_MJPEG, 90000, -1},

  69.   {27, "unassigned", CODEC_TYPE_VIDEO,   CODEC_ID_NONE, -1, -1},

  70.   {28, "nv",         CODEC_TYPE_VIDEO,   CODEC_ID_NONE, 90000, -1},

  71.   {29, "unassigned", CODEC_TYPE_VIDEO,   CODEC_ID_NONE, -1, -1},

  72.   {30, "unassigned", CODEC_TYPE_VIDEO,   CODEC_ID_NONE, -1, -1},

  73.   {31, "H261",       CODEC_TYPE_VIDEO,   CODEC_ID_H261, 90000, -1},

  74.   {32, "MPV",        CODEC_TYPE_VIDEO,   CODEC_ID_MPEG1VIDEO, 90000, -1},

  75.   {32, "MPV",        CODEC_TYPE_VIDEO,   CODEC_ID_MPEG2VIDEO, 90000, -1},

  76.   {33, "MP2T",       CODEC_TYPE_DATA,    CODEC_ID_MPEG2TS, 90000, -1},

  77.   {34, "H263",       CODEC_TYPE_VIDEO,   CODEC_ID_H263, 90000, -1},

  78.   {35, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  79.   {36, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  80.   {37, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  81.   {38, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  82.   {39, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  83.   {40, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  84.   {41, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  85.   {42, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  86.   {43, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  87.   {44, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  88.   {45, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  89.   {46, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  90.   {47, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  91.   {48, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  92.   {49, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  93.   {50, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  94.   {51, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  95.   {52, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  96.   {53, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  97.   {54, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  98.   {55, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  99.   {56, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  100.   {57, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  101.   {58, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  102.   {59, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  103.   {60, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  104.   {61, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  105.   {62, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  106.   {63, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  107.   {64, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  108.   {65, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  109.   {66, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  110.   {67, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  111.   {68, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  112.   {69, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  113.   {70, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  114.   {71, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  115.   {72, "reserved for RTCP conflict avoidance", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  116.   {73, "reserved for RTCP conflict avoidance", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  117.   {74, "reserved for RTCP conflict avoidance", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  118.   {75, "reserved for RTCP conflict avoidance", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  119.   {76, "reserved for RTCP conflict avoidance", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  120.   {77, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  121.   {78, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  122.   {79, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  123.   {80, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  124.   {81, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  125.   {82, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  126.   {83, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  127.   {84, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  128.   {85, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  129.   {86, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  130.   {87, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  131.   {88, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  132.   {89, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  133.   {90, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  134.   {91, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  135.   {92, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  136.   {93, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  137.   {94, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  138.   {95, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  139.   {96, "dynamic",    CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  140.   {97, "dynamic",    CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  141.   {98, "dynamic",    CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  142.   {99, "dynamic",    CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  143.   {100, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  144.   {101, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  145.   {102, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  146.   {103, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  147.   {104, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  148.   {105, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  149.   {106, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  150.   {107, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  151.   {108, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  152.   {109, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  153.   {110, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  154.   {111, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  155.   {112, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  156.   {113, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  157.   {114, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  158.   {115, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  159.   {116, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  160.   {117, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  161.   {118, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  162.   {119, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  163.   {120, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  164.   {121, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  165.   {122, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  166.   {123, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  167.   {124, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  168.   {125, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  169.   {126, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  170.   {127, "dynamic",   CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},

  171.   {-1, "",           CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1}

  172. };

  173. 

  174. int rtp_get_codec_info(AVCodecContext *codec, int payload_type)

  175. {

  176.     int i = 0;

  177. 

  178.     for (i = 0; AVRtpPayloadTypes[i].pt >= 0; i++)

  179.         if (AVRtpPayloadTypes[i].pt == payload_type) {

  180.             if (AVRtpPayloadTypes[i].codec_id != CODEC_ID_NONE) {

  181.                 codec->codec_type = AVRtpPayloadTypes[i].codec_type;

  182.                 codec->codec_id = AVRtpPayloadTypes[i].codec_id;

  183.                 if (AVRtpPayloadTypes[i].audio_channels > 0)

  184.                     codec->channels = AVRtpPayloadTypes[i].audio_channels;

  185.                 if (AVRtpPayloadTypes[i].clock_rate > 0)

  186.                     codec->sample_rate = AVRtpPayloadTypes[i].clock_rate;

  187.                 return 0;

  188.             }

  189.         }

  190.     return -1;

  191. }

  192. 

  193. int rtp_get_payload_type(AVCodecContext *codec)

  194. {

  195.     int i, payload_type;

  196. 

  197.     /* compute the payload type */

  198.     for (payload_type = -1, i = 0; AVRtpPayloadTypes[i].pt >= 0; ++i)

  199.         if (AVRtpPayloadTypes[i].codec_id == codec->codec_id) {

  200.             if (codec->codec_id == CODEC_ID_PCM_S16BE)

  201.                 if (codec->channels != AVRtpPayloadTypes[i].audio_channels)

  202.                     continue;

  203.             payload_type = AVRtpPayloadTypes[i].pt;

  204.         }

  205.     return payload_type;

  206. }

  207. 

  208. const char *ff_rtp_enc_name(int payload_type)

  209. {

  210.     int i;

  211. 

  212.     for (i = 0; AVRtpPayloadTypes[i].pt >= 0; i++)

  213.         if (AVRtpPayloadTypes[i].pt == payload_type) {

  214.             return AVRtpPayloadTypes[i].enc_name;

  215.         }

  216. 

  217.     return "";

  218. }

  219. 

  220. enum CodecID ff_rtp_codec_id(const char *buf, enum CodecType codec_type)

  221. {

  222.     int i;

  223. 

  224.     for (i = 0; AVRtpPayloadTypes[i].pt >= 0; i++)

  225.         if (!strcmp(buf, AVRtpPayloadTypes[i].enc_name) && (codec_type == AVRtpPayloadTypes[i].codec_type)){

  226.             return AVRtpPayloadTypes[i].codec_id;

  227.         }

  228. 

  229.     return CODEC_ID_NONE;

  230. }