content/renderer/media/rtc_video_encoder_factory.cc

   1 // Copyright 2013 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 "content/renderer/media/rtc_video_encoder_factory.h"
   6
   7 #include "base/command_line.h"
   8 #include "content/common/gpu/client/gpu_video_encode_accelerator_host.h"
   9 #include "content/public/common/content_switches.h"
  10 #include "content/renderer/media/rtc_video_encoder.h"
  11 #include "media/filters/gpu_video_accelerator_factories.h"
  12 #include "media/video/video_encode_accelerator.h"
  13
  14 namespace content {
  15
  16 namespace {
  17
  18 // Translate from media::VideoEncodeAccelerator::SupportedProfile to
  19 // one or more instances of cricket::WebRtcVideoEncoderFactory::VideoCodec
  20 void VEAToWebRTCCodecs(
  21     std::vector<cricket::WebRtcVideoEncoderFactory::VideoCodec>* codecs,
  22     const media::VideoEncodeAccelerator::SupportedProfile& profile) {
  23   int width = profile.max_resolution.width();
  24   int height = profile.max_resolution.height();
  25   int fps = profile.max_framerate_numerator;
  26   DCHECK_EQ(profile.max_framerate_denominator, 1U);
  27
  28   const base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
  29   if (profile.profile >= media::VP8PROFILE_MIN &&
  30       profile.profile <= media::VP8PROFILE_MAX) {
  31     if (cmd_line->HasSwitch(switches::kEnableWebRtcHWVp8Encoding)) {
  32       codecs->push_back(cricket::WebRtcVideoEncoderFactory::VideoCodec(
  33           webrtc::kVideoCodecVP8, "VP8", width, height, fps));
  34     }
  35   } else if (profile.profile >= media::H264PROFILE_MIN &&
  36              profile.profile <= media::H264PROFILE_MAX) {
  37     if (cmd_line->HasSwitch(switches::kEnableWebRtcHWH264Encoding)) {
  38       codecs->push_back(cricket::WebRtcVideoEncoderFactory::VideoCodec(
  39           webrtc::kVideoCodecH264, "H264", width, height, fps));
  40     }
  41     // TODO(hshi): remove the generic codec type after CASTv1 deprecation.
  42     codecs->push_back(cricket::WebRtcVideoEncoderFactory::VideoCodec(
  43         webrtc::kVideoCodecGeneric, "CAST1", width, height, fps));
  44   }
  45 }
  46
  47 }  // anonymous namespace
  48
  49 RTCVideoEncoderFactory::RTCVideoEncoderFactory(
  50     const scoped_refptr<media::GpuVideoAcceleratorFactories>& gpu_factories)
  51     : gpu_factories_(gpu_factories) {
  52   std::vector<media::VideoEncodeAccelerator::SupportedProfile> profiles =
  53       gpu_factories_->GetVideoEncodeAcceleratorSupportedProfiles();
  54   for (size_t i = 0; i < profiles.size(); ++i)
  55     VEAToWebRTCCodecs(&codecs_, profiles[i]);
  56 }
  57
  58 RTCVideoEncoderFactory::~RTCVideoEncoderFactory() {}
  59
  60 webrtc::VideoEncoder* RTCVideoEncoderFactory::CreateVideoEncoder(
  61     webrtc::VideoCodecType type) {
  62   bool found = false;
  63   for (size_t i = 0; i < codecs_.size(); ++i) {
  64     if (codecs_[i].type == type) {
  65       found = true;
  66       break;
  67     }
  68   }
  69   if (!found)
  70     return NULL;
  71   return new RTCVideoEncoder(type, gpu_factories_);
  72 }
  73
  74 const std::vector<cricket::WebRtcVideoEncoderFactory::VideoCodec>&
  75 RTCVideoEncoderFactory::codecs() const {
  76   return codecs_;
  77 }
  78
  79 void RTCVideoEncoderFactory::DestroyVideoEncoder(
  80     webrtc::VideoEncoder* encoder) {
  81   delete encoder;
  82 }
  83
  84 }  // namespace content