gecko-dev/dom/media/fmp4/MP4Decoder.cpp

248 lines
6.4 KiB
C++

/* -*- 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 "MP4Decoder.h"
#include "MP4Reader.h"
#include "MediaDecoderStateMachine.h"
#include "mozilla/Preferences.h"
#include "nsCharSeparatedTokenizer.h"
#ifdef MOZ_EME
#include "mozilla/CDMProxy.h"
#endif
#include "prlog.h"
#ifdef XP_WIN
#include "mozilla/WindowsVersion.h"
#include "WMFDecoderModule.h"
#endif
#ifdef MOZ_FFMPEG
#include "FFmpegRuntimeLinker.h"
#endif
#ifdef MOZ_APPLEMEDIA
#include "apple/AppleDecoderModule.h"
#endif
#ifdef MOZ_WIDGET_ANDROID
#include "nsIGfxInfo.h"
#include "AndroidBridge.h"
#endif
namespace mozilla {
MediaDecoderStateMachine* MP4Decoder::CreateStateMachine()
{
return new MediaDecoderStateMachine(this, new MP4Reader(this));
}
#ifdef MOZ_EME
nsresult
MP4Decoder::SetCDMProxy(CDMProxy* aProxy)
{
nsresult rv = MediaDecoder::SetCDMProxy(aProxy);
NS_ENSURE_SUCCESS(rv, rv);
{
// The MP4Reader can't decrypt EME content until it has a CDMProxy,
// and the CDMProxy knows the capabilities of the CDM. The MP4Reader
// remains in "waiting for resources" state until then.
CDMCaps::AutoLock caps(aProxy->Capabilites());
nsRefPtr<nsIRunnable> task(
NS_NewRunnableMethod(this, &MediaDecoder::NotifyWaitingForResourcesStatusChanged));
caps.CallOnMainThreadWhenCapsAvailable(task);
}
return NS_OK;
}
#endif
static bool
IsSupportedAudioCodec(const nsAString& aCodec,
bool& aOutContainsAAC,
bool& aOutContainsMP3)
{
// AAC-LC or HE-AAC in M4A.
aOutContainsAAC = aCodec.EqualsASCII("mp4a.40.2") ||
aCodec.EqualsASCII("mp4a.40.5");
if (aOutContainsAAC) {
#ifdef XP_WIN
if (!Preferences::GetBool("media.fragmented-mp4.use-blank-decoder") &&
!WMFDecoderModule::HasAAC()) {
return false;
}
#endif
return true;
}
#ifndef MOZ_GONK_MEDIACODEC // B2G doesn't support MP3 in MP4 yet.
aOutContainsMP3 = aCodec.EqualsASCII("mp3");
if (aOutContainsMP3) {
return true;
}
#else
aOutContainsMP3 = false;
#endif
return false;
}
static bool
IsSupportedH264Codec(const nsAString& aCodec)
{
int16_t profile = 0, level = 0;
if (!ExtractH264CodecDetails(aCodec, profile, level)) {
return false;
}
#ifdef XP_WIN
if (!Preferences::GetBool("media.fragmented-mp4.use-blank-decoder") &&
!WMFDecoderModule::HasH264()) {
return false;
}
#endif
// Just assume what we can play on all platforms the codecs/formats that
// WMF can play, since we don't have documentation about what other
// platforms can play... According to the WMF documentation:
// http://msdn.microsoft.com/en-us/library/windows/desktop/dd797815%28v=vs.85%29.aspx
// "The Media Foundation H.264 video decoder is a Media Foundation Transform
// that supports decoding of Baseline, Main, and High profiles, up to level
// 5.1.". We also report that we can play Extended profile, as there are
// bitstreams that are Extended compliant that are also Baseline compliant.
return level >= H264_LEVEL_1 &&
level <= H264_LEVEL_5_1 &&
(profile == H264_PROFILE_BASE ||
profile == H264_PROFILE_MAIN ||
profile == H264_PROFILE_EXTENDED ||
profile == H264_PROFILE_HIGH);
}
/* static */
bool
MP4Decoder::CanHandleMediaType(const nsACString& aType,
const nsAString& aCodecs,
bool& aOutContainsAAC,
bool& aOutContainsH264,
bool& aOutContainsMP3)
{
if (!IsEnabled()) {
return false;
}
if (aType.EqualsASCII("audio/mp4") || aType.EqualsASCII("audio/x-m4a")) {
return aCodecs.IsEmpty() ||
IsSupportedAudioCodec(aCodecs,
aOutContainsAAC,
aOutContainsMP3);
}
if (!aType.EqualsASCII("video/mp4")) {
return false;
}
// Verify that all the codecs specifed are ones that we expect that
// we can play.
nsCharSeparatedTokenizer tokenizer(aCodecs, ',');
bool expectMoreTokens = false;
while (tokenizer.hasMoreTokens()) {
const nsSubstring& token = tokenizer.nextToken();
expectMoreTokens = tokenizer.separatorAfterCurrentToken();
if (IsSupportedAudioCodec(token,
aOutContainsAAC,
aOutContainsMP3)) {
continue;
}
if (IsSupportedH264Codec(token)) {
aOutContainsH264 = true;
continue;
}
return false;
}
if (expectMoreTokens) {
// Last codec name was empty
return false;
}
return true;
}
static bool
IsFFmpegAvailable()
{
#ifndef MOZ_FFMPEG
return false;
#else
if (!Preferences::GetBool("media.fragmented-mp4.ffmpeg.enabled", false)) {
return false;
}
// If we can link to FFmpeg, then we can almost certainly play H264 and AAC
// with it.
return FFmpegRuntimeLinker::Link();
#endif
}
static bool
IsAppleAvailable()
{
#ifndef MOZ_APPLEMEDIA
// Not the right platform.
return false;
#else
if (!Preferences::GetBool("media.apple.mp4.enabled", false)) {
// Disabled by preference.
return false;
}
return NS_SUCCEEDED(AppleDecoderModule::CanDecode());
#endif
}
static bool
IsAndroidAvailable()
{
#ifndef MOZ_WIDGET_ANDROID
return false;
#else
// We need android.media.MediaCodec which exists in API level 16 and higher.
return AndroidBridge::Bridge()->GetAPIVersion() >= 16;
#endif
}
static bool
IsGonkMP4DecoderAvailable()
{
return Preferences::GetBool("media.fragmented-mp4.gonk.enabled", false);
}
static bool
IsGMPDecoderAvailable()
{
return Preferences::GetBool("media.fragmented-mp4.gmp.enabled", false);
}
static bool
HavePlatformMPEGDecoders()
{
return Preferences::GetBool("media.fragmented-mp4.use-blank-decoder") ||
#ifdef XP_WIN
// We have H.264/AAC platform decoders on Windows Vista and up.
IsVistaOrLater() ||
#endif
IsAndroidAvailable() ||
IsFFmpegAvailable() ||
IsAppleAvailable() ||
IsGonkMP4DecoderAvailable() ||
IsGMPDecoderAvailable() ||
// TODO: Other platforms...
false;
}
/* static */
bool
MP4Decoder::IsEnabled()
{
return Preferences::GetBool("media.fragmented-mp4.enabled") &&
HavePlatformMPEGDecoders();
}
} // namespace mozilla