Set generic frame descriptor extension for HEVC (#95)

Author: taste1981

call/rtp_payload_params.cc

@@ -317,8 +317,32 @@ void RtpPayloadParams::SetGeneric(const CodecSpecificInfo* codec_specific_info,
                                   int64_t frame_id,
                                   bool is_keyframe,
                                   RTPVideoHeader* rtp_video_header) {
-  if (codec_specific_info && codec_specific_info->generic_frame_info &&
+
+#ifdef WEBRTC_USE_H265
+  if (codec_specific_info->codecType == webrtc::kVideoCodecH265 &&
+      codec_specific_info->codecSpecific.H265.picture_id > 0) {
+    // H265ToGeneric implementation. Only set it when picture id is valid.
+    rtp_video_header->generic->frame_id =
+        codec_specific_info->codecSpecific.H265.picture_id;
+    rtp_video_header->generic->discardable =
+        codec_specific_info->codecSpecific.H265.discardable;
+    rtp_video_header->generic->spatial_index = 0;  // Not enabled at present.
+    rtp_video_header->generic->temporal_index = 0;  // Not enabled at present.
+    for (int dep_idx = 0; dep_idx < 5; dep_idx++) {
+      if (codec_specific_info->codecSpecific.H265.dependencies[dep_idx] <= 0)
+        break;
+      rtp_video_header->generic->dependencies[dep_idx] =
+          codec_specific_info->codecSpecific.H265.dependencies[dep_idx];
+    }
+    // Not filling DTIs at present.
+    rtp_video_header->generic->discardable =
+        codec_specific_info->codecSpecific.H265.discardable;
+    return;
+  }
+#else
+   if (codec_specific_info && codec_specific_info->generic_frame_info &&
       !codec_specific_info->generic_frame_info->encoder_buffers.empty()) {
+    // If generic frame info is provided for other codecs, use generic frame info.
     if (is_keyframe) {
       // Key frame resets all chains it is in.
       chains_calculator_.Reset(
@@ -328,6 +352,8 @@ void RtpPayloadParams::SetGeneric(const CodecSpecificInfo* codec_specific_info,
         *codec_specific_info->generic_frame_info, frame_id);
     return;
   }
+#endif
+
 
   switch (rtp_video_header->codec) {
     case VideoCodecType::kVideoCodecGeneric:
@@ -355,6 +381,7 @@ void RtpPayloadParams::SetGeneric(const CodecSpecificInfo* codec_specific_info,
       }
       return;
 #ifndef DISABLE_H265
+    // No further special handling for H.265
     case VideoCodecType::kVideoCodecH265:
 #endif
     case VideoCodecType::kVideoCodecMultiplex:

modules/video_coding/include/video_codec_interface.h

@@ -100,6 +100,9 @@ struct CodecSpecificInfoH265 {
   bool idr_frame;
   bool last_fragment_in_frame;
   int16_t picture_id;
+  int dependencies[5];
+  int dtis[10];
+  bool discardable;
 };
 #endif