third_party/chromium/media/cast/sender/video_encoder.cc

// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "media/cast/sender/video_encoder.h"

#include "build/build_config.h"
#include "media/cast/sender/external_video_encoder.h"
#include "media/cast/sender/video_encoder_impl.h"

#if defined(OS_MAC)
#include "media/cast/sender/h264_vt_encoder.h"
#endif

namespace media {
namespace cast {

// static
std::unique_ptr<VideoEncoder> VideoEncoder::Create(
    const scoped_refptr<CastEnvironment>& cast_environment,
    const FrameSenderConfig& video_config,
    StatusChangeCallback status_change_cb,
    const CreateVideoEncodeAcceleratorCallback& create_vea_cb) {
// On MacOS or IOS, attempt to use the system VideoToolbox library to
// perform optimized H.264 encoding.
#if defined(OS_MAC)
  if (H264VideoToolboxEncoder::IsSupported(video_config)) {
    return std::unique_ptr<VideoEncoder>(new H264VideoToolboxEncoder(
        cast_environment, video_config, status_change_cb));
  }
#endif  // defined(OS_MAC)

#if !defined(OS_IOS)
  // If the system provides a hardware-accelerated encoder, use it.
  if (ExternalVideoEncoder::IsSupported(video_config)) {
    return std::unique_ptr<VideoEncoder>(new SizeAdaptableExternalVideoEncoder(
        cast_environment, video_config, std::move(status_change_cb),
        create_vea_cb));
  }

  // Attempt to use the software encoder implementation.
  if (VideoEncoderImpl::IsSupported(video_config)) {
    return std::unique_ptr<VideoEncoder>(
        new VideoEncoderImpl(cast_environment, video_config, status_change_cb));
  }
#endif  // !defined(OS_IOS)

  // No encoder implementation will suffice.
  return nullptr;
}

std::unique_ptr<VideoFrameFactory> VideoEncoder::CreateVideoFrameFactory() {
  return nullptr;
}

void VideoEncoder::EmitFrames() {
}

}  // namespace cast
}  // namespace media