Source code
Revision control
Copy as Markdown
Other Tools
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#ifndef __FFmpegDecoderModule_h__
#define __FFmpegDecoderModule_h__
#include "FFmpegAudioDecoder.h"
#include "FFmpegLibWrapper.h"
#include "FFmpegVideoDecoder.h"
#include "PlatformDecoderModule.h"
#include "VideoUtils.h"
#include "VPXDecoder.h"
#include "mozilla/StaticPrefs_media.h"
namespace mozilla {
template <int V>
class FFmpegDecoderModule : public PlatformDecoderModule {
public:
static already_AddRefed<PlatformDecoderModule> Create(
FFmpegLibWrapper* aLib) {
RefPtr<PlatformDecoderModule> pdm = new FFmpegDecoderModule(aLib);
return pdm.forget();
}
explicit FFmpegDecoderModule(FFmpegLibWrapper* aLib) : mLib(aLib) {}
virtual ~FFmpegDecoderModule() = default;
already_AddRefed<MediaDataDecoder> CreateVideoDecoder(
const CreateDecoderParams& aParams) override {
if (Supports(SupportDecoderParams(aParams), nullptr).isEmpty()) {
return nullptr;
}
RefPtr<MediaDataDecoder> decoder = new FFmpegVideoDecoder<V>(
mLib, aParams.VideoConfig(), aParams.mKnowsCompositor,
aParams.mImageContainer,
aParams.mOptions.contains(CreateDecoderParams::Option::LowLatency),
aParams.mOptions.contains(
CreateDecoderParams::Option::HardwareDecoderNotAllowed),
aParams.mTrackingId);
return decoder.forget();
}
already_AddRefed<MediaDataDecoder> CreateAudioDecoder(
const CreateDecoderParams& aParams) override {
if (Supports(SupportDecoderParams(aParams), nullptr).isEmpty()) {
return nullptr;
}
RefPtr<MediaDataDecoder> decoder = new FFmpegAudioDecoder<V>(mLib, aParams);
return decoder.forget();
}
media::DecodeSupportSet SupportsMimeType(
const nsACString& aMimeType,
DecoderDoctorDiagnostics* aDiagnostics) const override {
UniquePtr<TrackInfo> trackInfo = CreateTrackInfoWithMIMEType(aMimeType);
if (!trackInfo) {
return media::DecodeSupportSet{};
}
return Supports(SupportDecoderParams(*trackInfo), aDiagnostics);
}
media::DecodeSupportSet Supports(
const SupportDecoderParams& aParams,
DecoderDoctorDiagnostics* aDiagnostics) const override {
// This should only be supported by MFMediaEngineDecoderModule.
if (aParams.mMediaEngineId) {
return media::DecodeSupportSet{};
}
const auto& trackInfo = aParams.mConfig;
const nsACString& mimeType = trackInfo.mMimeType;
// Temporary - forces use of VPXDecoder when alpha is present.
// the check for alpha to PDMFactory but not itself remove the need for a
// check.
if (VPXDecoder::IsVPX(mimeType) && trackInfo.GetAsVideoInfo()->HasAlpha()) {
MOZ_LOG(sPDMLog, LogLevel::Debug,
("FFmpeg decoder rejects requested type '%s'",
mimeType.BeginReading()));
return media::DecodeSupportSet{};
}
if (VPXDecoder::IsVP9(mimeType) &&
aParams.mOptions.contains(CreateDecoderParams::Option::LowLatency)) {
// SVC layers are unsupported, and may be used in low latency use cases
// (WebRTC).
return media::DecodeSupportSet{};
}
AVCodecID videoCodec = FFmpegVideoDecoder<V>::GetCodecId(mimeType);
AVCodecID audioCodec = FFmpegAudioDecoder<V>::GetCodecId(
mimeType,
trackInfo.GetAsAudioInfo() ? *trackInfo.GetAsAudioInfo() : AudioInfo());
if (audioCodec == AV_CODEC_ID_NONE && videoCodec == AV_CODEC_ID_NONE) {
MOZ_LOG(sPDMLog, LogLevel::Debug,
("FFmpeg decoder rejects requested type '%s'",
mimeType.BeginReading()));
return media::DecodeSupportSet{};
}
AVCodecID codecId =
audioCodec != AV_CODEC_ID_NONE ? audioCodec : videoCodec;
AVCodec* codec = FFmpegDataDecoder<V>::FindAVCodec(mLib, codecId);
MOZ_LOG(sPDMLog, LogLevel::Debug,
("FFmpeg decoder %s requested type '%s'",
!!codec ? "supports" : "rejects", mimeType.BeginReading()));
if (!codec) {
return media::DecodeSupportSet{};
}
// This logic is mirrored in FFmpegDataDecoder<LIBAV_VER>::InitDecoder and
// FFmpegVideoDecoder<LIBAV_VER>::InitVAAPIDecoder. We prefer to use our own
// OpenH264 decoder through the plugin over ffmpeg by default due to broken
// decoding with some versions.
if (!strcmp(codec->name, "libopenh264") &&
!StaticPrefs::media_ffmpeg_allow_openh264()) {
MOZ_LOG(sPDMLog, LogLevel::Debug,
("FFmpeg decoder rejects as openh264 disabled by pref"));
return media::DecodeSupportSet{};
}
// TODO: Note that we do not yet distinguish between SW/HW decode support.
return media::DecodeSupport::SoftwareDecode;
}
protected:
bool SupportsColorDepth(
gfx::ColorDepth aColorDepth,
DecoderDoctorDiagnostics* aDiagnostics) const override {
#if defined(MOZ_WIDGET_ANDROID)
return aColorDepth == gfx::ColorDepth::COLOR_8;
#endif
return true;
}
private:
FFmpegLibWrapper* mLib;
};
} // namespace mozilla
#endif // __FFmpegDecoderModule_h__