text: /* GStreamer
   * Copyright (C) <2007> Wim Taymans <wim.taymans@gmail.com>
   *
   * gstrtppayloads.h: various helper functions to deal with RTP payload
   *     types.
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Library 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
   * Library General Public License for more details.
   *
   * You should have received a copy of the GNU Library 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.
   */
  
  #ifndef __GST_RTPPAYLOADS_H__
  #define __GST_RTPPAYLOADS_H__
  
  #include <gst/gst.h>
  
  G_BEGIN_DECLS
  
  /** 
   * GstRTPPayload:
   * @GST_RTP_PAYLOAD_PCMU: ITU-T G.711. mu-law audio (RFC 3551)
   * @GST_RTP_PAYLOAD_1016: RFC 3551 says reserved
   * @GST_RTP_PAYLOAD_G721: RFC 3551 says reserved
   * @GST_RTP_PAYLOAD_GSM: GSM audio
   * @GST_RTP_PAYLOAD_G723: ITU G.723.1 audio
   * @GST_RTP_PAYLOAD_DVI4_8000: IMA ADPCM wave type (RFC 3551)
   * @GST_RTP_PAYLOAD_DVI4_16000: IMA ADPCM wave type (RFC 3551)
   * @GST_RTP_PAYLOAD_LPC: experimental linear predictive encoding
   * @GST_RTP_PAYLOAD_PCMA: ITU-T G.711 A-law audio (RFC 3551)
   * @GST_RTP_PAYLOAD_G722: ITU-T G.722 (RFC 3551)
   * @GST_RTP_PAYLOAD_L16_STEREO: stereo PCM
   * @GST_RTP_PAYLOAD_L16_MONO: mono PCM
   * @GST_RTP_PAYLOAD_QCELP: EIA & TIA standard IS-733
   * @GST_RTP_PAYLOAD_CN: Comfort Noise (RFC 3389)
   * @GST_RTP_PAYLOAD_MPA: Audio MPEG 1-3.
   * @GST_RTP_PAYLOAD_G728: ITU-T G.728 Speech coder (RFC 3551)
   * @GST_RTP_PAYLOAD_DVI4_11025: IMA ADPCM wave type (RFC 3551)
   * @GST_RTP_PAYLOAD_DVI4_22050: IMA ADPCM wave type (RFC 3551)
   * @GST_RTP_PAYLOAD_G729: ITU-T G.729 Speech coder (RFC 3551)
   * @GST_RTP_PAYLOAD_CELLB: See RFC 2029
   * @GST_RTP_PAYLOAD_JPEG: ISO Standards 10918-1 and 10918-2 (RFC 2435)
   * @GST_RTP_PAYLOAD_NV: nv encoding by Ron Frederick
   * @GST_RTP_PAYLOAD_H261: ITU-T Recommendation H.261 (RFC 2032)
   * @GST_RTP_PAYLOAD_MPV: Video MPEG 1 & 2 (RFC 2250)
   * @GST_RTP_PAYLOAD_MP2T: MPEG-2 transport stream (RFC 2250)
   * @GST_RTP_PAYLOAD_H263: Video H263 (RFC 2190)
   *
   *
   * Standard predefined fixed payload types.
   *
   * The official list is at:
   * http://www.iana.org/assignments/rtp-parameters
   *
   * Audio:
   * reserved: 19
   * unassigned: 20-23, 
   *
   * Video:
   * unassigned: 24, 27, 29, 30, 35-71, 77-95
   * Reserved for RTCP conflict avoidance: 72-76
   */
  typedef enum
  {
    /* Audio: */
    GST_RTP_PAYLOAD_PCMU = 0,
    GST_RTP_PAYLOAD_1016 = 1, /* RFC 3551 says reserved */
    GST_RTP_PAYLOAD_G721 = 2, /* RFC 3551 says reserved */
    GST_RTP_PAYLOAD_GSM = 3,
    GST_RTP_PAYLOAD_G723 = 4,
    GST_RTP_PAYLOAD_DVI4_8000 = 5,
    GST_RTP_PAYLOAD_DVI4_16000 = 6,
    GST_RTP_PAYLOAD_LPC = 7,
    GST_RTP_PAYLOAD_PCMA = 8,
    GST_RTP_PAYLOAD_G722 = 9,
    GST_RTP_PAYLOAD_L16_STEREO = 10,
    GST_RTP_PAYLOAD_L16_MONO = 11,
    GST_RTP_PAYLOAD_QCELP = 12,
    GST_RTP_PAYLOAD_CN = 13,
    GST_RTP_PAYLOAD_MPA = 14,
    GST_RTP_PAYLOAD_G728 = 15,
    GST_RTP_PAYLOAD_DVI4_11025 = 16,
    GST_RTP_PAYLOAD_DVI4_22050 = 17,
    GST_RTP_PAYLOAD_G729 = 18,   
  
    /* Video: */
  
    GST_RTP_PAYLOAD_CELLB = 25,
    GST_RTP_PAYLOAD_JPEG = 26,
    GST_RTP_PAYLOAD_NV = 28,
    GST_RTP_PAYLOAD_H261 = 31,
    GST_RTP_PAYLOAD_MPV = 32,
    GST_RTP_PAYLOAD_MP2T = 33,
    GST_RTP_PAYLOAD_H263 = 34,
  
    /* BOTH */
  } GstRTPPayload;
  
  /* backward compatibility */
  #define GST_RTP_PAYLOAD_G723_63 16
  #define GST_RTP_PAYLOAD_G723_53 17
  #define GST_RTP_PAYLOAD_TS48 18
  #define GST_RTP_PAYLOAD_TS41 19
  
  #define GST_RTP_PAYLOAD_G723_63_STRING "16"
  #define GST_RTP_PAYLOAD_G723_53_STRING "17"
  #define GST_RTP_PAYLOAD_TS48_STRING "18"
  #define GST_RTP_PAYLOAD_TS41_STRING "19"
  
  /* Defining the above as strings, to make the declaration of pad_templates
   * easier. So if please keep these synchronized with the above.
   */
  #define GST_RTP_PAYLOAD_PCMU_STRING "0"
  #define GST_RTP_PAYLOAD_1016_STRING "1"
  #define GST_RTP_PAYLOAD_G721_STRING "2"
  #define GST_RTP_PAYLOAD_GSM_STRING "3"
  #define GST_RTP_PAYLOAD_G723_STRING "4"
  #define GST_RTP_PAYLOAD_DVI4_8000_STRING "5"
  #define GST_RTP_PAYLOAD_DVI4_16000_STRING "6"
  #define GST_RTP_PAYLOAD_LPC_STRING "7"
  #define GST_RTP_PAYLOAD_PCMA_STRING "8"
  #define GST_RTP_PAYLOAD_G722_STRING "9"
  #define GST_RTP_PAYLOAD_L16_STEREO_STRING "10"
  #define GST_RTP_PAYLOAD_L16_MONO_STRING "11"
  #define GST_RTP_PAYLOAD_QCELP_STRING "12"
  #define GST_RTP_PAYLOAD_CN_STRING "13"
  #define GST_RTP_PAYLOAD_MPA_STRING "14"
  #define GST_RTP_PAYLOAD_G728_STRING "15"
  #define GST_RTP_PAYLOAD_DVI4_11025_STRING "16"
  #define GST_RTP_PAYLOAD_DVI4_22050_STRING "17"
  #define GST_RTP_PAYLOAD_G729_STRING "18"
  
  #define GST_RTP_PAYLOAD_CELLB_STRING "25"
  #define GST_RTP_PAYLOAD_JPEG_STRING "26"
  #define GST_RTP_PAYLOAD_NV_STRING "28"
  
  #define GST_RTP_PAYLOAD_H261_STRING "31"
  #define GST_RTP_PAYLOAD_MPV_STRING "32"
  #define GST_RTP_PAYLOAD_MP2T_STRING "33"
  #define GST_RTP_PAYLOAD_H263_STRING "34"
  
  #define GST_RTP_PAYLOAD_DYNAMIC_STRING "[96, 127]"
  
  /**
   * GST_RTP_PAYLOAD_IS_DYNAMIC:
   * @pt: a payload type
   *
   * Check if @pt is a dynamic payload type.
   */
  #define GST_RTP_PAYLOAD_IS_DYNAMIC(pt) ((pt) >= 96 && (pt) <= 127)
  
  typedef struct _GstRTPPayloadInfo GstRTPPayloadInfo;
  
  /**
   * GstRTPPayloadInfo:
   * @payload_type: payload type, -1 means dynamic
   * @media: the media type(s), usually "audio", "video", "application", "text",
   * "message".
   * @encoding_name: the encoding name of @pt
   * @clock_rate: default clock rate, 0 = unknown/variable
   * @encoding_parameters: encoding parameters. For audio this is the number of
   * channels. NULL = not applicable.
   * @bitrate: the bitrate of the media. 0 = unknown/variable.
   *
   * Structure holding default payload type information.
   */
  struct _GstRTPPayloadInfo
  {
    guint8       payload_type;
    const gchar *media;
    const gchar *encoding_name;
    guint        clock_rate;
    const gchar *encoding_parameters;
    guint        bitrate;
  };
  
  const GstRTPPayloadInfo *  gst_rtp_payload_info_for_pt     (guint8 payload_type);
  const GstRTPPayloadInfo *  gst_rtp_payload_info_for_name   (const gchar *media, const gchar *encoding_name);
  
  G_END_DECLS
  
  #endif /* __GST_RTPPAYLOADS_H__ */
  
  