Expose via GMP API temporal layer info at encoder initialization and on a per frame basis. (#3821)

Author: aosmond

Makefile

@@ -29,7 +29,7 @@ LIBDIR_NAME=lib
 SHAREDLIB_DIR=$(PREFIX)/lib
 PROJECT_NAME=openh264
 MODULE_NAME=gmpopenh264
-GMP_API_BRANCH=Firefox114_2
+GMP_API_BRANCH=Firefox135
 GTEST_VER=release-1.8.1
 CCASFLAGS=$(CFLAGS)
 STATIC_LDFLAGS=-lstdc++

module/gmp-openh264.cpp

@@ -445,6 +445,10 @@ class OpenH264VideoEncoder : public GMPVideoEncoder, public RefCounted {
       }
     }
 
+    if (gmp_api_version_ >= kGMPVersion36) {
+      param.iTemporalLayerNum = codecSettings.mTemporalLayerNum;
+    }
+
     //for controlling the NAL size (normally for packetization-mode=0)
     if (maxPayloadSize != 0) {
       if (gmp_api_version_ < kGMPVersion35) {
@@ -741,6 +745,10 @@ class OpenH264VideoEncoder : public GMPVideoEncoder, public RefCounted {
     f->SetCompleteFrame (true);
     f->SetBufferType (GMP_BufferLength32);
 
+    if (gmp_api_version_ >= kGMPVersion36) {
+      f->SetTemporalLayerId (encoded->iLayerNum);
+    }
+
     GMPLOG (GL_DEBUG, "Encoding complete. type= "
             << f->FrameType()
             << " length="