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 // Translate from cricket::WebRtcVideoEncoderFactory::VideoCodec to
  48 // media::VideoCodecProfile.  Pick a default profile for each codec type.
  49 media::VideoCodecProfile WebRTCCodecToVideoCodecProfile(
  50     webrtc::VideoCodecType type) {
  51   switch (type) {
  52     case webrtc::kVideoCodecVP8:
  53       return media::VP8PROFILE_ANY;
  54     case webrtc::kVideoCodecH264:
  55     case webrtc::kVideoCodecGeneric:
  56       return media::H264PROFILE_MAIN;
  57     default:
  58       return media::VIDEO_CODEC_PROFILE_UNKNOWN;
  59   }
  60 }
  61
  62 }  // anonymous namespace
  63
  64 RTCVideoEncoderFactory::RTCVideoEncoderFactory(
  65     const scoped_refptr<media::GpuVideoAcceleratorFactories>& gpu_factories)
  66     : gpu_factories_(gpu_factories) {
  67   // Query media::VideoEncodeAccelerator (statically) for our supported codecs.
  68   std::vector<media::VideoEncodeAccelerator::SupportedProfile> profiles =
  69       GpuVideoEncodeAcceleratorHost::GetSupportedProfiles();
  70   for (size_t i = 0; i < profiles.size(); ++i)
  71     VEAToWebRTCCodecs(&codecs_, profiles[i]);
  72 }
  73
  74 RTCVideoEncoderFactory::~RTCVideoEncoderFactory() {}
  75
  76 webrtc::VideoEncoder* RTCVideoEncoderFactory::CreateVideoEncoder(
  77     webrtc::VideoCodecType type) {
  78   bool found = false;
  79   for (size_t i = 0; i < codecs_.size(); ++i) {
  80     if (codecs_[i].type == type) {
  81       found = true;
  82       break;
  83     }
  84   }
  85   if (!found)
  86     return NULL;
  87   return new RTCVideoEncoder(
  88       type, WebRTCCodecToVideoCodecProfile(type), gpu_factories_);
  89 }
  90
  91 void RTCVideoEncoderFactory::AddObserver(Observer* observer) {
  92   // No-op: our codec list is populated on installation.
  93 }
  94
  95 void RTCVideoEncoderFactory::RemoveObserver(Observer* observer) {}
  96
  97 const std::vector<cricket::WebRtcVideoEncoderFactory::VideoCodec>&
  98 RTCVideoEncoderFactory::codecs() const {
  99   return codecs_;
 100 }
 101
 102 void RTCVideoEncoderFactory::DestroyVideoEncoder(
 103     webrtc::VideoEncoder* encoder) {
 104   delete encoder;
 105 }
 106
 107 }  // namespace content