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/* -*- 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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "AppleDecoderModule.h"
#include <dlfcn.h>
#include "AppleATDecoder.h"
#include "AppleVTDecoder.h"
#include "MP4Decoder.h"
#include "VideoUtils.h"
#include "VPXDecoder.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/Logging.h"
#include "mozilla/StaticPrefs_media.h"
#include "mozilla/gfx/gfxVars.h"
extern "C" {
// Only exists from MacOS 11
extern void VTRegisterSupplementalVideoDecoderIfAvailable(
CMVideoCodecType codecType) __attribute__((weak_import));
extern Boolean VTIsHardwareDecodeSupported(CMVideoCodecType codecType)
__attribute__((weak_import));
}
namespace mozilla {
bool AppleDecoderModule::sInitialized = false;
bool AppleDecoderModule::sCanUseVP9Decoder = false;
/* static */
void AppleDecoderModule::Init() {
if (sInitialized) {
return;
}
sInitialized = true;
if (RegisterSupplementalVP9Decoder()) {
sCanUseVP9Decoder = CanCreateHWDecoder(media::MediaCodec::VP9);
}
}
nsresult AppleDecoderModule::Startup() {
if (!sInitialized) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
already_AddRefed<MediaDataDecoder> AppleDecoderModule::CreateVideoDecoder(
const CreateDecoderParams& aParams) {
if (Supports(SupportDecoderParams(aParams), nullptr /* diagnostics */) ==
media::DecodeSupport::Unsupported) {
return nullptr;
}
RefPtr<MediaDataDecoder> decoder;
if (IsVideoSupported(aParams.VideoConfig(), aParams.mOptions)) {
decoder = new AppleVTDecoder(aParams.VideoConfig(), aParams.mImageContainer,
aParams.mOptions, aParams.mKnowsCompositor,
aParams.mTrackingId);
}
return decoder.forget();
}
already_AddRefed<MediaDataDecoder> AppleDecoderModule::CreateAudioDecoder(
const CreateDecoderParams& aParams) {
if (Supports(SupportDecoderParams(aParams), nullptr /* diagnostics */) ==
media::DecodeSupport::Unsupported) {
return nullptr;
}
RefPtr<MediaDataDecoder> decoder = new AppleATDecoder(aParams.AudioConfig());
return decoder.forget();
}
media::DecodeSupportSet AppleDecoderModule::SupportsMimeType(
const nsACString& aMimeType, DecoderDoctorDiagnostics* aDiagnostics) const {
bool checkSupport = (aMimeType.EqualsLiteral("audio/mpeg") &&
!StaticPrefs::media_ffvpx_mp3_enabled()) ||
aMimeType.EqualsLiteral("audio/mp4a-latm") ||
MP4Decoder::IsH264(aMimeType) ||
VPXDecoder::IsVP9(aMimeType);
media::DecodeSupportSet supportType{media::DecodeSupport::Unsupported};
if (checkSupport) {
UniquePtr<TrackInfo> trackInfo = CreateTrackInfoWithMIMEType(aMimeType);
if (!trackInfo) {
supportType = media::DecodeSupport::Unsupported;
} else if (trackInfo->IsAudio()) {
supportType = media::DecodeSupport::SoftwareDecode;
} else {
supportType = Supports(SupportDecoderParams(*trackInfo), aDiagnostics);
}
}
MOZ_LOG(sPDMLog, LogLevel::Debug,
("Apple decoder %s requested type '%s'",
supportType == media::DecodeSupport::Unsupported ? "rejects"
: "supports",
aMimeType.BeginReading()));
return supportType;
}
media::DecodeSupportSet AppleDecoderModule::Supports(
const SupportDecoderParams& aParams,
DecoderDoctorDiagnostics* aDiagnostics) const {
const auto& trackInfo = aParams.mConfig;
if (trackInfo.IsAudio()) {
return SupportsMimeType(trackInfo.mMimeType, aDiagnostics);
}
bool checkSupport = trackInfo.GetAsVideoInfo() &&
IsVideoSupported(*trackInfo.GetAsVideoInfo());
if (checkSupport) {
if (trackInfo.mMimeType == "video/vp9" &&
CanCreateHWDecoder(media::MediaCodec::VP9)) {
return media::DecodeSupport::HardwareDecode;
}
return media::DecodeSupport::SoftwareDecode;
}
return media::DecodeSupport::Unsupported;
}
bool AppleDecoderModule::IsVideoSupported(
const VideoInfo& aConfig,
const CreateDecoderParams::OptionSet& aOptions) const {
if (MP4Decoder::IsH264(aConfig.mMimeType)) {
return true;
}
if (!VPXDecoder::IsVP9(aConfig.mMimeType) || !sCanUseVP9Decoder ||
aOptions.contains(
CreateDecoderParams::Option::HardwareDecoderNotAllowed)) {
return false;
}
if (aConfig.HasAlpha()) {
return false;
}
// HW VP9 decoder only supports 8 or 10 bit color.
if (aConfig.mColorDepth != gfx::ColorDepth::COLOR_8 &&
aConfig.mColorDepth != gfx::ColorDepth::COLOR_10) {
return false;
}
// See if we have a vpcC box, and check further constraints.
// HW VP9 Decoder supports Profile 0 & 2 (YUV420)
if (aConfig.mExtraData && aConfig.mExtraData->Length() < 5) {
return true; // Assume it's okay.
}
int profile = aConfig.mExtraData->ElementAt(4);
if (profile != 0 && profile != 2) {
return false;
}
return true;
}
/* static */
bool AppleDecoderModule::CanCreateHWDecoder(media::MediaCodec aCodec) {
// Check whether HW decode should even be enabled
if (!gfx::gfxVars::CanUseHardwareVideoDecoding()) {
return false;
}
VideoInfo info(1920, 1080);
bool checkSupport = false;
// We must wrap the code within __builtin_available to avoid compilation
// warning as VTIsHardwareDecodeSupported is only available from macOS 10.13.
if (__builtin_available(macOS 10.13, *)) {
if (!VTIsHardwareDecodeSupported) {
return false;
}
switch (aCodec) {
case media::MediaCodec::VP9:
info.mMimeType = "video/vp9";
VPXDecoder::GetVPCCBox(info.mExtraData, VPXDecoder::VPXStreamInfo());
checkSupport = VTIsHardwareDecodeSupported(kCMVideoCodecType_VP9);
break;
default:
// Only support VP9 HW decode for time being
checkSupport = false;
break;
}
}
// Attempt to create decoder
if (checkSupport) {
RefPtr<AppleVTDecoder> decoder =
new AppleVTDecoder(info, nullptr, {}, nullptr, Nothing());
MediaResult rv = decoder->InitializeSession();
// Removed decoder->IsHardwareAccelerated check to revert logic to before
// H264 support was implemented -- see bug 1806391 and
// revision db00f7fb1e9b13cff0ca6ed4ffdbc5897fa88e38
decoder->Shutdown();
return NS_SUCCEEDED(rv);
}
return false;
}
/* static */
bool AppleDecoderModule::RegisterSupplementalVP9Decoder() {
static bool sRegisterIfAvailable = []() {
#if !defined(MAC_OS_VERSION_11_0) || \
MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_VERSION_11_0
if (nsCocoaFeatures::OnBigSurOrLater()) {
#else
if (__builtin_available(macos 11.0, *)) {
#endif
VTRegisterSupplementalVideoDecoderIfAvailable(kCMVideoCodecType_VP9);
return true;
}
return false;
}();
return sRegisterIfAvailable;
}
/* static */
already_AddRefed<PlatformDecoderModule> AppleDecoderModule::Create() {
return MakeAndAddRef<AppleDecoderModule>();
}
} // namespace mozilla
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