text: /**
   * @file avcodec/sdp.c  Video codecs using libavcodec -- SDP functions
   *
   * Copyright (C) 2010 Creytiv.com
   */
  
  #include <re.h>
  #include <baresip.h>
  #include <libavcodec/avcodec.h>
  #include "avcodec.h"
  
  
  static const uint8_t h264_level_idc = 0x1f;
  
  
  uint32_t h264_packetization_mode(const char *fmtp)
  {
  	struct pl pl, mode;
  
  	if (!fmtp)
  		return 0;
  
  	pl_set_str(&pl, fmtp);
  
  	if (fmt_param_get(&pl, "packetization-mode", &mode))
  		return pl_u32(&mode);
  
  	return 0;
  }
  
  
  int avcodec_h264_fmtp_enc(struct mbuf *mb, const struct sdp_format *fmt,
  			  bool offer, void *arg)
  {
  	struct vidcodec *vc = arg;
  	const uint8_t profile_idc = 0x42; /* baseline profile */
  	const uint8_t profile_iop = 0x80;
  	(void)offer;
  
  	if (!mb || !fmt || !vc)
  		return 0;
  
  	return mbuf_printf(mb, "a=fmtp:%s"
  			   " %s"
  			   ";profile-level-id=%02x%02x%02x"
  			   "\r\n",
  			   fmt->id, vc->variant,
  			   profile_idc, profile_iop, h264_level_idc);
  }
  
  
  bool avcodec_h264_fmtp_cmp(const char *lfmtp, const char *rfmtp, void *arg)
  {
  	const struct vidcodec *vc = arg;
  	(void)lfmtp;
  
  	if (!vc)
  		return false;
  
  	return h264_packetization_mode(vc->variant) ==
  		h264_packetization_mode(rfmtp);
  }
  