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     codecs->push_back(cricket::WebRtcVideoEncoderFactory::VideoCodec(
  32         webrtc::kVideoCodecVP8, "VP8", width, height, fps));
  33   } else if (profile.profile >= media::H264PROFILE_MIN &&
  34              profile.profile <= media::H264PROFILE_MAX) {
  35     if (cmd_line->HasSwitch(switches::kEnableWebRtcHWH264Encoding)) {
  36       codecs->push_back(cricket::WebRtcVideoEncoderFactory::VideoCodec(
  37           webrtc::kVideoCodecH264, "H264", width, height, fps));
  38     }
  39   }
  40 }
  41
  42 }  // anonymous namespace
  43
  44 RTCVideoEncoderFactory::RTCVideoEncoderFactory(
  45     const scoped_refptr<media::GpuVideoAcceleratorFactories>& gpu_factories)
  46     : gpu_factories_(gpu_factories) {
  47   std::vector<media::VideoEncodeAccelerator::SupportedProfile> profiles =
  48       gpu_factories_->GetVideoEncodeAcceleratorSupportedProfiles();
  49   for (size_t i = 0; i < profiles.size(); ++i)
  50     VEAToWebRTCCodecs(&codecs_, profiles[i]);
  51 }
  52
  53 RTCVideoEncoderFactory::~RTCVideoEncoderFactory() {}
  54
  55 webrtc::VideoEncoder* RTCVideoEncoderFactory::CreateVideoEncoder(
  56     webrtc::VideoCodecType type) {
  57   bool found = false;
  58   for (size_t i = 0; i < codecs_.size(); ++i) {
  59     if (codecs_[i].type == type) {
  60       found = true;
  61       break;
  62     }
  63   }
  64   if (!found)
  65     return NULL;
  66   return new RTCVideoEncoder(type, gpu_factories_);
  67 }
  68
  69 const std::vector<cricket::WebRtcVideoEncoderFactory::VideoCodec>&
  70 RTCVideoEncoderFactory::codecs() const {
  71   return codecs_;
  72 }
  73
  74 void RTCVideoEncoderFactory::DestroyVideoEncoder(
  75     webrtc::VideoEncoder* encoder) {
  76   delete encoder;
  77 }
  78
  79 }  // namespace content