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ffmpeg-4.2.2/libavformat/rtpenc.h 4.31 KB
aac5773f   hucm   功能基本完成,接口待打磨
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  /*
   * RTP muxer definitions
   * Copyright (c) 2002 Fabrice Bellard
   *
   * This file is part of FFmpeg.
   *
   * FFmpeg 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 2.1 of the License, or (at your option) any later version.
   *
   * FFmpeg 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 FFmpeg; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
   */
  #ifndef AVFORMAT_RTPENC_H
  #define AVFORMAT_RTPENC_H
  
  #include "avformat.h"
  #include "rtp.h"
  
  struct RTPMuxContext {
      const AVClass *av_class;
      AVFormatContext *ic;
      AVStream *st;
      int payload_type;
      uint32_t ssrc;
      const char *cname;
      int seq;
      uint32_t timestamp;
      uint32_t base_timestamp;
      uint32_t cur_timestamp;
      int max_payload_size;
      int num_frames;
  
      /* rtcp sender statistics */
      int64_t last_rtcp_ntp_time;
      int64_t first_rtcp_ntp_time;
      unsigned int packet_count;
      unsigned int octet_count;
      unsigned int last_octet_count;
      int first_packet;
      /* buffer for output */
      uint8_t *buf;
      uint8_t *buf_ptr;
  
      int max_frames_per_packet;
  
      /**
       * Number of bytes used for H.264 NAL length, if the MP4 syntax is used
       * (1, 2 or 4)
       */
      int nal_length_size;
      int buffered_nals;
  
      int flags;
  
      unsigned int frame_count;
  };
  
  typedef struct RTPMuxContext RTPMuxContext;
  
  #define FF_RTP_FLAG_MP4A_LATM 1
  #define FF_RTP_FLAG_RFC2190   2
  #define FF_RTP_FLAG_SKIP_RTCP 4
  #define FF_RTP_FLAG_H264_MODE0 8
  #define FF_RTP_FLAG_SEND_BYE  16
  
  #define FF_RTP_FLAG_OPTS(ctx, fieldname) \
      { "rtpflags", "RTP muxer flags", offsetof(ctx, fieldname), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "rtpflags" }, \
      { "latm", "Use MP4A-LATM packetization instead of MPEG4-GENERIC for AAC", 0, AV_OPT_TYPE_CONST, {.i64 = FF_RTP_FLAG_MP4A_LATM}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "rtpflags" }, \
      { "rfc2190", "Use RFC 2190 packetization instead of RFC 4629 for H.263", 0, AV_OPT_TYPE_CONST, {.i64 = FF_RTP_FLAG_RFC2190}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "rtpflags" }, \
      { "skip_rtcp", "Don't send RTCP sender reports", 0, AV_OPT_TYPE_CONST, {.i64 = FF_RTP_FLAG_SKIP_RTCP}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "rtpflags" }, \
      { "h264_mode0", "Use mode 0 for H.264 in RTP", 0, AV_OPT_TYPE_CONST, {.i64 = FF_RTP_FLAG_H264_MODE0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "rtpflags" }, \
      { "send_bye", "Send RTCP BYE packets when finishing", 0, AV_OPT_TYPE_CONST, {.i64 = FF_RTP_FLAG_SEND_BYE}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "rtpflags" } \
  
  void ff_rtp_send_data(AVFormatContext *s1, const uint8_t *buf1, int len, int m);
  
  void ff_rtp_send_h264_hevc(AVFormatContext *s1, const uint8_t *buf1, int size);
  void ff_rtp_send_h261(AVFormatContext *s1, const uint8_t *buf1, int size);
  void ff_rtp_send_h263(AVFormatContext *s1, const uint8_t *buf1, int size);
  void ff_rtp_send_h263_rfc2190(AVFormatContext *s1, const uint8_t *buf1, int size,
                                const uint8_t *mb_info, int mb_info_size);
  void ff_rtp_send_aac(AVFormatContext *s1, const uint8_t *buff, int size);
  void ff_rtp_send_latm(AVFormatContext *s1, const uint8_t *buff, int size);
  void ff_rtp_send_amr(AVFormatContext *s1, const uint8_t *buff, int size);
  void ff_rtp_send_mpegvideo(AVFormatContext *s1, const uint8_t *buf1, int size);
  void ff_rtp_send_xiph(AVFormatContext *s1, const uint8_t *buff, int size);
  void ff_rtp_send_vc2hq(AVFormatContext *s1, const uint8_t *buf, int size, int interlaced);
  void ff_rtp_send_vp8(AVFormatContext *s1, const uint8_t *buff, int size);
  void ff_rtp_send_vp9(AVFormatContext *s1, const uint8_t *buff, int size);
  void ff_rtp_send_jpeg(AVFormatContext *s1, const uint8_t *buff, int size);
  
  const uint8_t *ff_h263_find_resync_marker_reverse(const uint8_t *av_restrict start,
                                                    const uint8_t *av_restrict end);
  
  #endif /* AVFORMAT_RTPENC_H */