michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* vim:set ts=2 sw=2 sts=2 et cindent: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "MP4Decoder.h"
michael@0: #include "MP4Reader.h"
michael@0: #include "MediaDecoderStateMachine.h"
michael@0: #include "mozilla/Preferences.h"
michael@0: 
michael@0: #ifdef XP_WIN
michael@0: #include "mozilla/WindowsVersion.h"
michael@0: #endif
michael@0: #ifdef MOZ_FFMPEG
michael@0: #include "FFmpegDecoderModule.h"
michael@0: #endif
michael@0: 
michael@0: namespace mozilla {
michael@0: 
michael@0: MediaDecoderStateMachine* MP4Decoder::CreateStateMachine()
michael@0: {
michael@0:   return new MediaDecoderStateMachine(this, new MP4Reader(this));
michael@0: }
michael@0: 
michael@0: bool
michael@0: MP4Decoder::GetSupportedCodecs(const nsACString& aType,
michael@0:                                char const *const ** aCodecList)
michael@0: {
michael@0:   if (!IsEnabled()) {
michael@0:     return false;
michael@0:   }
michael@0: 
michael@0:   // AAC in M4A.
michael@0:   static char const *const aacAudioCodecs[] = {
michael@0:     "mp4a.40.2",    // AAC-LC
michael@0:     // TODO: AAC-HE ?
michael@0:     nullptr
michael@0:   };
michael@0:   if (aType.EqualsASCII("audio/mp4") ||
michael@0:       aType.EqualsASCII("audio/x-m4a")) {
michael@0:     if (aCodecList) {
michael@0:       *aCodecList = aacAudioCodecs;
michael@0:     }
michael@0:     return true;
michael@0:   }
michael@0: 
michael@0:   // H.264 + AAC in MP4.
michael@0:   static char const *const h264Codecs[] = {
michael@0:     "avc1.42E01E",  // H.264 Constrained Baseline Profile Level 3.0
michael@0:     "avc1.42001E",  // H.264 Baseline Profile Level 3.0
michael@0:     "avc1.58A01E",  // H.264 Extended Profile Level 3.0
michael@0:     "avc1.4D401E",  // H.264 Main Profile Level 3.0
michael@0:     "avc1.64001E",  // H.264 High Profile Level 3.0
michael@0:     "avc1.64001F",  // H.264 High Profile Level 3.1
michael@0:     "mp4a.40.2",    // AAC-LC
michael@0:     // TODO: There must be more profiles here?
michael@0:     nullptr
michael@0:   };
michael@0:   if (aType.EqualsASCII("video/mp4")) {
michael@0:     if (aCodecList) {
michael@0:       *aCodecList = h264Codecs;
michael@0:     }
michael@0:     return true;
michael@0:   }
michael@0: 
michael@0:   return false;
michael@0: }
michael@0: 
michael@0: static bool
michael@0: IsFFmpegAvailable()
michael@0: {
michael@0: #ifndef MOZ_FFMPEG
michael@0:   return false;
michael@0: #else
michael@0:   if (!Preferences::GetBool("media.fragmented-mp4.ffmpeg.enabled", false)) {
michael@0:     return false;
michael@0:   }
michael@0: 
michael@0:   // If we can link to FFmpeg, then we can almost certainly play H264 and AAC
michael@0:   // with it.
michael@0:   return FFmpegDecoderModule::Link();
michael@0: #endif
michael@0: }
michael@0: 
michael@0: static bool
michael@0: HavePlatformMPEGDecoders()
michael@0: {
michael@0:   return Preferences::GetBool("media.fragmented-mp4.use-blank-decoder") ||
michael@0: #ifdef XP_WIN
michael@0:          // We have H.264/AAC platform decoders on Windows Vista and up.
michael@0:          IsVistaOrLater() ||
michael@0: #endif
michael@0:          IsFFmpegAvailable() ||
michael@0:          // TODO: Other platforms...
michael@0:          false;
michael@0: }
michael@0: 
michael@0: /* static */
michael@0: bool
michael@0: MP4Decoder::IsEnabled()
michael@0: {
michael@0:   return HavePlatformMPEGDecoders() &&
michael@0:          Preferences::GetBool("media.fragmented-mp4.enabled");
michael@0: }
michael@0: 
michael@0: } // namespace mozilla
michael@0: