// 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_MACOSX)
#include "media/cast/sender/h264_vt_encoder.h"
#endif

namespace media {
namespace cast {

// static
scoped_ptr<VideoEncoder> VideoEncoder::Create(
      const scoped_refptr<CastEnvironment>& cast_environment,
      const VideoSenderConfig& video_config,
      const StatusChangeCallback& status_change_cb,
      const CreateVideoEncodeAcceleratorCallback& create_vea_cb,
      const CreateVideoEncodeMemoryCallback& create_video_encode_memory_cb) {
  // On MacOS or IOS, attempt to use the system VideoToolbox library to
  // perform optimized H.264 encoding.
#if defined(OS_MACOSX) || defined(OS_IOS)
  if (!video_config.use_external_encoder &&
      H264VideoToolboxEncoder::IsSupported(video_config)) {
    return scoped_ptr<VideoEncoder>(new H264VideoToolboxEncoder(
        cast_environment, video_config, status_change_cb));
  }
#endif  // defined(OS_MACOSX)

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

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

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

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

void VideoEncoder::EmitFrames() {
}

}  // namespace cast
}  // namespace media
