media/cast/sender/video_encoder.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "media/cast/sender/video_encoder.h"
   6
   7 #include "media/cast/sender/external_video_encoder.h"
   8 #include "media/cast/sender/video_encoder_impl.h"
   9
  10 #if defined(OS_MACOSX)
  11 #include "media/cast/sender/h264_vt_encoder.h"
  12 #endif
  13
  14 namespace media {
  15 namespace cast {
  16
  17 // static
  18 scoped_ptr<VideoEncoder> VideoEncoder::Create(
  19       const scoped_refptr<CastEnvironment>& cast_environment,
  20       const VideoSenderConfig& video_config,
  21       const StatusChangeCallback& status_change_cb,
  22       const CreateVideoEncodeAcceleratorCallback& create_vea_cb,
  23       const CreateVideoEncodeMemoryCallback& create_video_encode_memory_cb) {
  24   // On MacOS or IOS, attempt to use the system VideoToolbox library to
  25   // perform optimized H.264 encoding.
  26 #if defined(OS_MACOSX) || defined(OS_IOS)
  27   if (!video_config.use_external_encoder &&
  28       H264VideoToolboxEncoder::IsSupported(video_config)) {
  29     return scoped_ptr<VideoEncoder>(
  30         new SizeAdaptableH264VideoToolboxVideoEncoder(
  31             cast_environment,
  32             video_config,
  33             status_change_cb));
  34   }
  35 #endif  // defined(OS_MACOSX)
  36
  37   // If the system provides a hardware-accelerated encoder, use it.
  38 #if !defined(OS_IOS)
  39   if (ExternalVideoEncoder::IsSupported(video_config)) {
  40     return scoped_ptr<VideoEncoder>(new SizeAdaptableExternalVideoEncoder(
  41         cast_environment,
  42         video_config,
  43         status_change_cb,
  44         create_vea_cb,
  45         create_video_encode_memory_cb));
  46   }
  47 #endif  // !defined(OS_IOS)
  48
  49   // Attempt to use the software encoder implementation.
  50   if (VideoEncoderImpl::IsSupported(video_config)) {
  51     return scoped_ptr<VideoEncoder>(new VideoEncoderImpl(
  52         cast_environment,
  53         video_config,
  54         status_change_cb));
  55   }
  56
  57   // No encoder implementation will suffice.
  58   return nullptr;
  59 }
  60
  61 scoped_ptr<VideoFrameFactory> VideoEncoder::CreateVideoFrameFactory() {
  62   return nullptr;
  63 }
  64
  65 void VideoEncoder::EmitFrames() {
  66 }
  67
  68 }  // namespace cast
  69 }  // namespace media