/*
 *  Copyright (c) 2015 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 <memory>

#include "webrtc/modules/rtp_rtcp/include/rtp_rtcp.h"
#include "webrtc/modules/rtp_rtcp/mocks/mock_rtp_rtcp.h"
#include "webrtc/modules/video_coding/include/video_codec_interface.h"
#include "webrtc/test/gmock.h"
#include "webrtc/test/gtest.h"
#include "webrtc/video/payload_router.h"

using ::testing::_;
using ::testing::AnyNumber;
using ::testing::NiceMock;
using ::testing::Return;

namespace webrtc {

TEST(PayloadRouterTest, SendOnOneModule) {
  NiceMock<MockRtpRtcp> rtp;
  std::vector<RtpRtcp*> modules(1, &rtp);
  std::vector<VideoStream> streams(1);

  uint8_t payload = 'a';
  int8_t payload_type = 96;
  EncodedImage encoded_image;
  encoded_image._timeStamp = 1;
  encoded_image.capture_time_ms_ = 2;
  encoded_image._frameType = kVideoFrameKey;
  encoded_image._buffer = &payload;
  encoded_image._length = 1;

  PayloadRouter payload_router(modules, payload_type);

  EXPECT_CALL(rtp, SendOutgoingData(encoded_image._frameType, payload_type,
                                    encoded_image._timeStamp,
                                    encoded_image.capture_time_ms_, &payload,
                                    encoded_image._length, nullptr, _, _))
      .Times(0);
  EXPECT_NE(
      EncodedImageCallback::Result::OK,
      payload_router.OnEncodedImage(encoded_image, nullptr, nullptr).error);

  payload_router.SetActive(true);
  EXPECT_CALL(rtp, SendOutgoingData(encoded_image._frameType, payload_type,
                                    encoded_image._timeStamp,
                                    encoded_image.capture_time_ms_, &payload,
                                    encoded_image._length, nullptr, _, _))
      .Times(1)
      .WillOnce(Return(true));
  EXPECT_EQ(
      EncodedImageCallback::Result::OK,
      payload_router.OnEncodedImage(encoded_image, nullptr, nullptr).error);

  payload_router.SetActive(false);
  EXPECT_CALL(rtp, SendOutgoingData(encoded_image._frameType, payload_type,
                                    encoded_image._timeStamp,
                                    encoded_image.capture_time_ms_, &payload,
                                    encoded_image._length, nullptr, _, _))
      .Times(0);
  EXPECT_NE(
      EncodedImageCallback::Result::OK,
      payload_router.OnEncodedImage(encoded_image, nullptr, nullptr).error);

  payload_router.SetActive(true);
  EXPECT_CALL(rtp, SendOutgoingData(encoded_image._frameType, payload_type,
                                    encoded_image._timeStamp,
                                    encoded_image.capture_time_ms_, &payload,
                                    encoded_image._length, nullptr, _, _))
      .Times(1)
      .WillOnce(Return(true));
  EXPECT_EQ(
      EncodedImageCallback::Result::OK,
      payload_router.OnEncodedImage(encoded_image, nullptr, nullptr).error);
}

TEST(PayloadRouterTest, SendSimulcast) {
  NiceMock<MockRtpRtcp> rtp_1;
  NiceMock<MockRtpRtcp> rtp_2;
  std::vector<RtpRtcp*> modules;
  modules.push_back(&rtp_1);
  modules.push_back(&rtp_2);
  std::vector<VideoStream> streams(2);

  int8_t payload_type = 96;
  uint8_t payload = 'a';
  EncodedImage encoded_image;
  encoded_image._timeStamp = 1;
  encoded_image.capture_time_ms_ = 2;
  encoded_image._frameType = kVideoFrameKey;
  encoded_image._buffer = &payload;
  encoded_image._length = 1;

  PayloadRouter payload_router(modules, payload_type);

  CodecSpecificInfo codec_info_1;
  memset(&codec_info_1, 0, sizeof(CodecSpecificInfo));
  codec_info_1.codecType = kVideoCodecVP8;
  codec_info_1.codecSpecific.VP8.simulcastIdx = 0;

  payload_router.SetActive(true);
  EXPECT_CALL(rtp_1, SendOutgoingData(encoded_image._frameType, payload_type,
                                      encoded_image._timeStamp,
                                      encoded_image.capture_time_ms_, &payload,
                                      encoded_image._length, nullptr, _, _))
      .Times(1)
      .WillOnce(Return(true));
  EXPECT_CALL(rtp_2, SendOutgoingData(_, _, _, _, _, _, _, _, _)).Times(0);
  EXPECT_EQ(EncodedImageCallback::Result::OK,
            payload_router.OnEncodedImage(encoded_image, &codec_info_1, nullptr)
                .error);

  CodecSpecificInfo codec_info_2;
  memset(&codec_info_2, 0, sizeof(CodecSpecificInfo));
  codec_info_2.codecType = kVideoCodecVP8;
  codec_info_2.codecSpecific.VP8.simulcastIdx = 1;

  EXPECT_CALL(rtp_2, SendOutgoingData(encoded_image._frameType, payload_type,
                                      encoded_image._timeStamp,
                                      encoded_image.capture_time_ms_, &payload,
                                      encoded_image._length, nullptr, _, _))
      .Times(1)
      .WillOnce(Return(true));
  EXPECT_CALL(rtp_1, SendOutgoingData(_, _, _, _, _, _, _, _, _))
      .Times(0);
  EXPECT_EQ(EncodedImageCallback::Result::OK,
            payload_router.OnEncodedImage(encoded_image, &codec_info_2, nullptr)
                .error);

  // Inactive.
  payload_router.SetActive(false);
  EXPECT_CALL(rtp_1, SendOutgoingData(_, _, _, _, _, _, _, _, _))
      .Times(0);
  EXPECT_CALL(rtp_2, SendOutgoingData(_, _, _, _, _, _, _, _, _))
      .Times(0);
  EXPECT_NE(EncodedImageCallback::Result::OK,
            payload_router.OnEncodedImage(encoded_image, &codec_info_1, nullptr)
                .error);
  EXPECT_NE(EncodedImageCallback::Result::OK,
            payload_router.OnEncodedImage(encoded_image, &codec_info_2, nullptr)
                .error);
}

TEST(PayloadRouterTest, SimulcastTargetBitrate) {
  NiceMock<MockRtpRtcp> rtp_1;
  NiceMock<MockRtpRtcp> rtp_2;
  std::vector<RtpRtcp*> modules;
  modules.push_back(&rtp_1);
  modules.push_back(&rtp_2);
  PayloadRouter payload_router(modules, 42);
  payload_router.SetActive(true);

  BitrateAllocation bitrate;
  bitrate.SetBitrate(0, 0, 10000);
  bitrate.SetBitrate(0, 1, 20000);
  bitrate.SetBitrate(1, 0, 40000);
  bitrate.SetBitrate(1, 1, 80000);

  BitrateAllocation layer0_bitrate;
  layer0_bitrate.SetBitrate(0, 0, 10000);
  layer0_bitrate.SetBitrate(0, 1, 20000);

  BitrateAllocation layer1_bitrate;
  layer1_bitrate.SetBitrate(0, 0, 40000);
  layer1_bitrate.SetBitrate(0, 1, 80000);

  EXPECT_CALL(rtp_1, SetVideoBitrateAllocation(layer0_bitrate)).Times(1);
  EXPECT_CALL(rtp_2, SetVideoBitrateAllocation(layer1_bitrate)).Times(1);

  payload_router.OnBitrateAllocationUpdated(bitrate);
}

TEST(PayloadRouterTest, SimulcastTargetBitrateWithInactiveStream) {
  // Set up two active rtp modules.
  NiceMock<MockRtpRtcp> rtp_1;
  NiceMock<MockRtpRtcp> rtp_2;
  std::vector<RtpRtcp*> modules;
  modules.push_back(&rtp_1);
  modules.push_back(&rtp_2);
  PayloadRouter payload_router(modules, 42);
  payload_router.SetActive(true);

  // Create bitrate allocation with bitrate only for the first stream.
  BitrateAllocation bitrate;
  bitrate.SetBitrate(0, 0, 10000);
  bitrate.SetBitrate(0, 1, 20000);

  // Expect only the first rtp module to be asked to send a TargetBitrate
  // message. (No target bitrate with 0bps sent from the second one.)
  EXPECT_CALL(rtp_1, SetVideoBitrateAllocation(bitrate)).Times(1);
  EXPECT_CALL(rtp_2, SetVideoBitrateAllocation(_)).Times(0);

  payload_router.OnBitrateAllocationUpdated(bitrate);
}

TEST(PayloadRouterTest, SvcTargetBitrate) {
  NiceMock<MockRtpRtcp> rtp_1;
  std::vector<RtpRtcp*> modules;
  modules.push_back(&rtp_1);
  PayloadRouter payload_router(modules, 42);
  payload_router.SetActive(true);

  BitrateAllocation bitrate;
  bitrate.SetBitrate(0, 0, 10000);
  bitrate.SetBitrate(0, 1, 20000);
  bitrate.SetBitrate(1, 0, 40000);
  bitrate.SetBitrate(1, 1, 80000);

  EXPECT_CALL(rtp_1, SetVideoBitrateAllocation(bitrate)).Times(1);

  payload_router.OnBitrateAllocationUpdated(bitrate);
}

}  // namespace webrtc