/*
 *  Copyright 2018 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#include "modules/video_coding/codecs/h264/include/h264.h"
#include "modules/video_coding/codecs/vp8/include/vp8.h"
#include "modules/video_coding/codecs/vp9/include/vp9.h"
#include "test/call_test.h"
#include "test/encoder_settings.h"
#include "test/field_trial.h"
#include "test/gtest.h"

namespace webrtc {

class CodecEndToEndTest : public test::CallTest,
                          public testing::WithParamInterface<std::string> {
 public:
  CodecEndToEndTest() : field_trial_(GetParam()) {}

  virtual ~CodecEndToEndTest() {
    EXPECT_EQ(nullptr, video_send_stream_);
    EXPECT_TRUE(video_receive_streams_.empty());
  }

 private:
  test::ScopedFieldTrials field_trial_;
};

INSTANTIATE_TEST_CASE_P(RoundRobin,
                        CodecEndToEndTest,
                        ::testing::Values("WebRTC-RoundRobinPacing/Disabled/",
                                          "WebRTC-RoundRobinPacing/Enabled/"));

class CodecObserver : public test::EndToEndTest,
                      public rtc::VideoSinkInterface<VideoFrame> {
 public:
  CodecObserver(int no_frames_to_wait_for,
                VideoRotation rotation_to_test,
                const std::string& payload_name,
                std::unique_ptr<webrtc::VideoEncoder> encoder,
                std::unique_ptr<webrtc::VideoDecoder> decoder)
      : EndToEndTest(4 * CodecEndToEndTest::kDefaultTimeoutMs),
        // TODO(hta): This timeout (120 seconds) is excessive.
        // https://bugs.webrtc.org/6830
        no_frames_to_wait_for_(no_frames_to_wait_for),
        expected_rotation_(rotation_to_test),
        payload_name_(payload_name),
        encoder_(std::move(encoder)),
        decoder_(std::move(decoder)),
        frame_counter_(0) {}

  void PerformTest() override {
    EXPECT_TRUE(Wait())
        << "Timed out while waiting for enough frames to be decoded.";
  }

  void ModifyVideoConfigs(
      VideoSendStream::Config* send_config,
      std::vector<VideoReceiveStream::Config>* receive_configs,
      VideoEncoderConfig* encoder_config) override {
    send_config->encoder_settings.encoder = encoder_.get();
    send_config->encoder_settings.payload_name = payload_name_;
    send_config->encoder_settings.payload_type =
        test::CallTest::kVideoSendPayloadType;

    (*receive_configs)[0].renderer = this;
    (*receive_configs)[0].decoders.resize(1);
    (*receive_configs)[0].decoders[0].payload_type =
        send_config->encoder_settings.payload_type;
    (*receive_configs)[0].decoders[0].payload_name =
        send_config->encoder_settings.payload_name;
    (*receive_configs)[0].decoders[0].decoder = decoder_.get();
  }

  void OnFrame(const VideoFrame& video_frame) override {
    EXPECT_EQ(expected_rotation_, video_frame.rotation());
    if (++frame_counter_ == no_frames_to_wait_for_)
      observation_complete_.Set();
  }

  void OnFrameGeneratorCapturerCreated(
      test::FrameGeneratorCapturer* frame_generator_capturer) override {
    frame_generator_capturer->SetFakeRotation(expected_rotation_);
  }

 private:
  int no_frames_to_wait_for_;
  VideoRotation expected_rotation_;
  std::string payload_name_;
  std::unique_ptr<webrtc::VideoEncoder> encoder_;
  std::unique_ptr<webrtc::VideoDecoder> decoder_;
  int frame_counter_;
};

TEST_P(CodecEndToEndTest, SendsAndReceivesVP8) {
  CodecObserver test(5, kVideoRotation_0, "VP8", VP8Encoder::Create(),
                     VP8Decoder::Create());
  RunBaseTest(&test);
}

TEST_P(CodecEndToEndTest, SendsAndReceivesVP8Rotation90) {
  CodecObserver test(5, kVideoRotation_90, "VP8", VP8Encoder::Create(),
                     VP8Decoder::Create());
  RunBaseTest(&test);
}

#if !defined(RTC_DISABLE_VP9)
TEST_P(CodecEndToEndTest, SendsAndReceivesVP9) {
  CodecObserver test(500, kVideoRotation_0, "VP9", VP9Encoder::Create(),
                     VP9Decoder::Create());
  RunBaseTest(&test);
}

TEST_P(CodecEndToEndTest, SendsAndReceivesVP9VideoRotation90) {
  CodecObserver test(5, kVideoRotation_90, "VP9", VP9Encoder::Create(),
                     VP9Decoder::Create());
  RunBaseTest(&test);
}
#endif  // !defined(RTC_DISABLE_VP9)

#if defined(WEBRTC_USE_H264)
class EndToEndTestH264 : public CodecEndToEndTest {};

const auto h264_field_trial_combinations = ::testing::Values(
    "WebRTC-SpsPpsIdrIsH264Keyframe/Disabled/WebRTC-RoundRobinPacing/Disabled/",
    "WebRTC-SpsPpsIdrIsH264Keyframe/Enabled/WebRTC-RoundRobinPacing/Disabled/",
    "WebRTC-SpsPpsIdrIsH264Keyframe/Disabled/WebRTC-RoundRobinPacing/Enabled/",
    "WebRTC-SpsPpsIdrIsH264Keyframe/Enabled/WebRTC-RoundRobinPacing/Enabled/");
INSTANTIATE_TEST_CASE_P(SpsPpsIdrIsKeyframe,
                        EndToEndTestH264,
                        h264_field_trial_combinations);

TEST_P(EndToEndTestH264, SendsAndReceivesH264) {
  CodecObserver test(500, kVideoRotation_0, "H264",
                     H264Encoder::Create(cricket::VideoCodec("H264")),
                     H264Decoder::Create());
  RunBaseTest(&test);
}

TEST_P(EndToEndTestH264, SendsAndReceivesH264VideoRotation90) {
  CodecObserver test(5, kVideoRotation_90, "H264",
                     H264Encoder::Create(cricket::VideoCodec("H264")),
                     H264Decoder::Create());
  RunBaseTest(&test);
}

TEST_P(EndToEndTestH264, SendsAndReceivesH264PacketizationMode0) {
  cricket::VideoCodec codec = cricket::VideoCodec("H264");
  codec.SetParam(cricket::kH264FmtpPacketizationMode, "0");
  CodecObserver test(500, kVideoRotation_0, "H264", H264Encoder::Create(codec),
                     H264Decoder::Create());
  RunBaseTest(&test);
}

TEST_P(EndToEndTestH264, SendsAndReceivesH264PacketizationMode1) {
  cricket::VideoCodec codec = cricket::VideoCodec("H264");
  codec.SetParam(cricket::kH264FmtpPacketizationMode, "1");
  CodecObserver test(500, kVideoRotation_0, "H264", H264Encoder::Create(codec),
                     H264Decoder::Create());
  RunBaseTest(&test);
}
#endif  // defined(WEBRTC_USE_H264)

}  // namespace webrtc