RTC Video Encoder: Use capturer timestamp

media/gpu/video_encode_accelerator_unittest.cc

Index: media/gpu/video_encode_accelerator_unittest.cc
diff --git a/media/gpu/video_encode_accelerator_unittest.cc b/media/gpu/video_encode_accelerator_unittest.cc
index 0cfbfaaee3f657974a7ecbb8ea9dbcd367ee821b..05d5bf531777b550668b616545c3caba09f1b821 100644
--- a/media/gpu/video_encode_accelerator_unittest.cc
+++ b/media/gpu/video_encode_accelerator_unittest.cc
@@ -11,6 +11,7 @@
 #include <queue>
 #include <string>
 #include <utility>
+#include <queue>
 
 #include "base/at_exit.h"
 #include "base/bind.h"
@@ -808,7 +809,8 @@ class VEAClient : public VideoEncodeAccelerator::Client {
                                size_t output_buffer_size) override;
   void BitstreamBufferReady(int32_t bitstream_buffer_id,
                             size_t payload_size,
-                            bool key_frame) override;
+                            bool key_frame,
+                            base::TimeDelta timestamp) override;
   void NotifyError(VideoEncodeAccelerator::Error error) override;
 
  private:
@@ -989,6 +991,9 @@ class VEAClient : public VideoEncodeAccelerator::Client {
 
   // The timer used to feed the encoder with the input frames.
   std::unique_ptr<base::RepeatingTimer> input_timer_;
+
+  // The timestamps for each frame in the order of CreateFrame() invocation.
+  std::queue<base::TimeDelta> frame_timestamps_;
 };
 
 VEAClient::VEAClient(TestStream* test_stream,
@@ -1250,7 +1255,8 @@ void VEAClient::RequireBitstreamBuffers(unsigned int input_count,
 
 void VEAClient::BitstreamBufferReady(int32_t bitstream_buffer_id,
                                      size_t payload_size,
-                                     bool key_frame) {
+                                     bool key_frame,
+                                     base::TimeDelta timestamp) {
   DCHECK(thread_checker_.CalledOnValidThread());
   ASSERT_LE(payload_size, output_buffer_size_);
 
@@ -1262,6 +1268,10 @@ void VEAClient::BitstreamBufferReady(int32_t bitstream_buffer_id,
   if (state_ == CS_FINISHED || state_ == CS_VALIDATED)
     return;
 
+  ASSERT_FALSE(frame_timestamps_.empty());
+  ASSERT_EQ(timestamp, frame_timestamps_.front());
+  frame_timestamps_.pop();
+
   encoded_stream_size_since_last_check_ += payload_size;
 
   const uint8_t* stream_ptr = static_cast<const uint8_t*>(shm->memory());
@@ -1400,6 +1410,7 @@ void VEAClient::FeedEncoderWithOneInput() {
   int32_t input_id;
   scoped_refptr<media::VideoFrame> video_frame =
       PrepareInputFrame(pos_in_input_stream_, &input_id);
+  frame_timestamps_.push(video_frame->timestamp());
   pos_in_input_stream_ += test_stream_->aligned_buffer_size;
 
   bool force_keyframe = false;