The Tor Browser / file comparison
comparison: content/media/fmp4/MP4Decoder.cpp
content/media/fmp4/MP4Decoder.cpp
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
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| -1:000000000000 | 0:8b90dccd7604 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* vim:set ts=2 sw=2 sts=2 et cindent: */ | |
| 3 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #include "MP4Decoder.h" | |
| 8 #include "MP4Reader.h" | |
| 9 #include "MediaDecoderStateMachine.h" | |
| 10 #include "mozilla/Preferences.h" | |
| 11 | |
| 12 #ifdef XP_WIN | |
| 13 #include "mozilla/WindowsVersion.h" | |
| 14 #endif | |
| 15 #ifdef MOZ_FFMPEG | |
| 16 #include "FFmpegDecoderModule.h" | |
| 17 #endif | |
| 18 | |
| 19 namespace mozilla { | |
| 20 | |
| 21 MediaDecoderStateMachine* MP4Decoder::CreateStateMachine() | |
| 22 { | |
| 23 return new MediaDecoderStateMachine(this, new MP4Reader(this)); | |
| 24 } | |
| 25 | |
| 26 bool | |
| 27 MP4Decoder::GetSupportedCodecs(const nsACString& aType, | |
| 28 char const *const ** aCodecList) | |
| 29 { | |
| 30 if (!IsEnabled()) { | |
| 31 return false; | |
| 32 } | |
| 33 | |
| 34 // AAC in M4A. | |
| 35 static char const *const aacAudioCodecs[] = { | |
| 36 "mp4a.40.2", // AAC-LC | |
| 37 // TODO: AAC-HE ? | |
| 38 nullptr | |
| 39 }; | |
| 40 if (aType.EqualsASCII("audio/mp4") || | |
| 41 aType.EqualsASCII("audio/x-m4a")) { | |
| 42 if (aCodecList) { | |
| 43 *aCodecList = aacAudioCodecs; | |
| 44 } | |
| 45 return true; | |
| 46 } | |
| 47 | |
| 48 // H.264 + AAC in MP4. | |
| 49 static char const *const h264Codecs[] = { | |
| 50 "avc1.42E01E", // H.264 Constrained Baseline Profile Level 3.0 | |
| 51 "avc1.42001E", // H.264 Baseline Profile Level 3.0 | |
| 52 "avc1.58A01E", // H.264 Extended Profile Level 3.0 | |
| 53 "avc1.4D401E", // H.264 Main Profile Level 3.0 | |
| 54 "avc1.64001E", // H.264 High Profile Level 3.0 | |
| 55 "avc1.64001F", // H.264 High Profile Level 3.1 | |
| 56 "mp4a.40.2", // AAC-LC | |
| 57 // TODO: There must be more profiles here? | |
| 58 nullptr | |
| 59 }; | |
| 60 if (aType.EqualsASCII("video/mp4")) { | |
| 61 if (aCodecList) { | |
| 62 *aCodecList = h264Codecs; | |
| 63 } | |
| 64 return true; | |
| 65 } | |
| 66 | |
| 67 return false; | |
| 68 } | |
| 69 | |
| 70 static bool | |
| 71 IsFFmpegAvailable() | |
| 72 { | |
| 73 #ifndef MOZ_FFMPEG | |
| 74 return false; | |
| 75 #else | |
| 76 if (!Preferences::GetBool("media.fragmented-mp4.ffmpeg.enabled", false)) { | |
| 77 return false; | |
| 78 } | |
| 79 | |
| 80 // If we can link to FFmpeg, then we can almost certainly play H264 and AAC | |
| 81 // with it. | |
| 82 return FFmpegDecoderModule::Link(); | |
| 83 #endif | |
| 84 } | |
| 85 | |
| 86 static bool | |
| 87 HavePlatformMPEGDecoders() | |
| 88 { | |
| 89 return Preferences::GetBool("media.fragmented-mp4.use-blank-decoder") || | |
| 90 #ifdef XP_WIN | |
| 91 // We have H.264/AAC platform decoders on Windows Vista and up. | |
| 92 IsVistaOrLater() || | |
| 93 #endif | |
| 94 IsFFmpegAvailable() || | |
| 95 // TODO: Other platforms... | |
| 96 false; | |
| 97 } | |
| 98 | |
| 99 /* static */ | |
| 100 bool | |
| 101 MP4Decoder::IsEnabled() | |
| 102 { | |
| 103 return HavePlatformMPEGDecoders() && | |
| 104 Preferences::GetBool("media.fragmented-mp4.enabled"); | |
| 105 } | |
| 106 | |
| 107 } // namespace mozilla | |
| 108 |
