Android HW encoder: Add support for textures when using EGL 1.0

webrtc/api/java/src/org/webrtc/MediaCodecVideoEncoder.java

Index: webrtc/api/java/src/org/webrtc/MediaCodecVideoEncoder.java
diff --git a/webrtc/api/java/src/org/webrtc/MediaCodecVideoEncoder.java b/webrtc/api/java/src/org/webrtc/MediaCodecVideoEncoder.java
index d017becb67035a6c190332bec3733f4cf77d77b5..c5051d221cfff0ae044f3aa50e71cf0609317db6 100644
--- a/webrtc/api/java/src/org/webrtc/MediaCodecVideoEncoder.java
+++ b/webrtc/api/java/src/org/webrtc/MediaCodecVideoEncoder.java
@@ -63,7 +63,7 @@ public class MediaCodecVideoEncoder {
   private Thread mediaCodecThread;
   private MediaCodec mediaCodec;
   private ByteBuffer[] outputBuffers;
-  private EglBase14 eglBase;
+  private EglBase eglBase;
   private int width;
   private int height;
   private Surface inputSurface;
@@ -278,7 +278,7 @@ public class MediaCodecVideoEncoder {
   }
 
   boolean initEncode(VideoCodecType type, int width, int height, int kbps, int fps,
-      EglBase14.Context sharedContext) {
+      EglBase.Context sharedContext) {
     final boolean useSurface = sharedContext != null;
     Logging.d(TAG, "Java initEncode: " + type + " : " + width + " x " + height +
         ". @ " + kbps + " kbps. Fps: " + fps + ". Encode from texture : " + useSurface);
@@ -333,7 +333,11 @@ public class MediaCodecVideoEncoder {
           format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
 
       if (useSurface) {
-        eglBase = new EglBase14(sharedContext, EglBase.CONFIG_RECORDABLE);
+        eglBase = EglBase.create(sharedContext, EglBase.CONFIG_RECORDABLE);
+        if (!(eglBase instanceof EglBase14)) {
+          Logging.e(TAG, "Using EGL version other than 1.4 -"
+              + " will not be able to set presentation timestamp.");
+        }
         // Create an input surface and keep a reference since we must release the surface when done.
         inputSurface = mediaCodec.createInputSurface();
         eglBase.createSurface(inputSurface);
@@ -396,7 +400,16 @@ public class MediaCodecVideoEncoder {
       // but it's a workaround for bug webrtc:5147.
       GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
       drawer.drawOes(oesTextureId, transformationMatrix, 0, 0, width, height);
-      eglBase.swapBuffers(TimeUnit.MICROSECONDS.toNanos(presentationTimestampUs));
+      if (eglBase instanceof EglBase14) {
+        ((EglBase14) eglBase).swapBuffers(TimeUnit.MICROSECONDS.toNanos(presentationTimestampUs));
+      } else {
+        // |eglBase| is not always an instance of EglBase14 because of bug
+        // https://bugs.chromium.org/p/webrtc/issues/detail?id=5702. Setting the presentation
+        // timestamp might be important for qualcomm's encoders to determine a reasonable per-frame
+        // encode budget. This means that the encoder might produce low quality encoded delta frames
+        // for low frame rates even for high bitrates.
+        eglBase.swapBuffers();
+      }
       return true;
     }
     catch (RuntimeException e) {