tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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MediaDataCodec.cpp (1886B)

      1 /* This Source Code Form is subject to the terms of the Mozilla Public
      2 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
      3 * You can obtain one at http://mozilla.org/MPL/2.0/. */
      4 
      5 #include "MediaDataCodec.h"
      6 
      7 #include "PDMFactory.h"
      8 #include "WebrtcGmpVideoCodec.h"
      9 #include "WebrtcMediaDataDecoderCodec.h"
     10 #include "WebrtcMediaDataEncoderCodec.h"
     11 #include "mozilla/StaticPrefs_media.h"
     12 
     13 namespace mozilla {
     14 
     15 /* static */
     16 WebrtcVideoEncoder* MediaDataCodec::CreateEncoder(
     17    const webrtc::SdpVideoFormat& aFormat) {
     18  if (!WebrtcMediaDataEncoder::CanCreate(
     19          webrtc::PayloadStringToCodecType(aFormat.name))) {
     20    return nullptr;
     21  }
     22 
     23  return new WebrtcVideoEncoderProxy(new WebrtcMediaDataEncoder(aFormat));
     24 }
     25 
     26 /* static */
     27 WebrtcVideoDecoder* MediaDataCodec::CreateDecoder(
     28    webrtc::VideoCodecType aCodecType, TrackingId aTrackingId) {
     29  switch (aCodecType) {
     30    case webrtc::VideoCodecType::kVideoCodecVP8:
     31    case webrtc::VideoCodecType::kVideoCodecVP9:
     32      if (!StaticPrefs::media_navigator_mediadatadecoder_vpx_enabled()) {
     33        return nullptr;
     34      }
     35      break;
     36    case webrtc::VideoCodecType::kVideoCodecH264:
     37      if (!StaticPrefs::media_navigator_mediadatadecoder_h264_enabled()) {
     38        return nullptr;
     39      }
     40      break;
     41    default:
     42      return nullptr;
     43  }
     44 
     45  nsAutoCString codec;
     46  switch (aCodecType) {
     47    case webrtc::VideoCodecType::kVideoCodecVP8:
     48      codec = "video/vp8";
     49      break;
     50    case webrtc::VideoCodecType::kVideoCodecVP9:
     51      codec = "video/vp9";
     52      break;
     53    case webrtc::VideoCodecType::kVideoCodecH264:
     54      codec = "video/avc";
     55      break;
     56    default:
     57      return nullptr;
     58  }
     59  RefPtr<PDMFactory> pdm = new PDMFactory();
     60  if (pdm->SupportsMimeType(codec).isEmpty()) {
     61    return nullptr;
     62  }
     63 
     64  return new WebrtcMediaDataDecoder(codec, aTrackingId);
     65 }
     66 
     67 }  // namespace mozilla