gecko/content/media/fmp4/MP4Decoder.cpp

79 lines
1.9 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"
namespace mozilla {
MediaDecoderStateMachine* MP4Decoder::CreateStateMachine()
{
return new MediaDecoderStateMachine(this, new MP4Reader(this));
}
bool
MP4Decoder::GetSupportedCodecs(const nsACString& aType,
char const *const ** aCodecList)
{
if (!IsEnabled()) {
return false;
}
// AAC in M4A.
static char const *const aacAudioCodecs[] = {
"mp4a.40.2", // AAC-LC
// TODO: AAC-HE ?
nullptr
};
if (aType.EqualsASCII("audio/mp4") ||
aType.EqualsASCII("audio/x-m4a")) {
if (aCodecList) {
*aCodecList = aacAudioCodecs;
}
return true;
}
// H.264 + AAC in MP4.
static char const *const h264Codecs[] = {
"avc1.42E01E", // H.264 Constrained Baseline Profile Level 3.0
"avc1.42001E", // H.264 Baseline Profile Level 3.0
"avc1.58A01E", // H.264 Extended Profile Level 3.0
"avc1.4D401E", // H.264 Main Profile Level 3.0
"avc1.64001E", // H.264 High Profile Level 3.0
"avc1.64001F", // H.264 High Profile Level 3.1
"mp4a.40.2", // AAC-LC
// TODO: There must be more profiles here?
nullptr
};
if (aType.EqualsASCII("video/mp4")) {
if (aCodecList) {
*aCodecList = h264Codecs;
}
return true;
}
return false;
}
static bool
HavePlatformMPEGDecoders()
{
return false;
}
/* static */
bool
MP4Decoder::IsEnabled()
{
return HavePlatformMPEGDecoders() &&
Preferences::GetBool("media.fragmented-mp4.enabled");
}
} // namespace mozilla