content/media/fmp4/MP4Decoder.cpp@44a2da4a2ab2 (annotated)
content/media/fmp4/MP4Decoder.cpp
Fri, 16 Jan 2015 04:50:19 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Fri, 16 Jan 2015 04:50:19 +0100
- branch
- TOR_BUG_9701
- changeset 13
- 44a2da4a2ab2
- permissions
- -rw-r--r--
Replace accessor implementation with direct member state manipulation, by
request https://trac.torproject.org/projects/tor/ticket/9701#comment:32
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* vim:set ts=2 sw=2 sts=2 et cindent: */ |
| michael@0 | 3 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | #include "MP4Decoder.h" |
| michael@0 | 8 | #include "MP4Reader.h" |
| michael@0 | 9 | #include "MediaDecoderStateMachine.h" |
| michael@0 | 10 | #include "mozilla/Preferences.h" |
| michael@0 | 11 | |
| michael@0 | 12 | #ifdef XP_WIN |
| michael@0 | 13 | #include "mozilla/WindowsVersion.h" |
| michael@0 | 14 | #endif |
| michael@0 | 15 | #ifdef MOZ_FFMPEG |
| michael@0 | 16 | #include "FFmpegDecoderModule.h" |
| michael@0 | 17 | #endif |
| michael@0 | 18 | |
| michael@0 | 19 | namespace mozilla { |
| michael@0 | 20 | |
| michael@0 | 21 | MediaDecoderStateMachine* MP4Decoder::CreateStateMachine() |
| michael@0 | 22 | { |
| michael@0 | 23 | return new MediaDecoderStateMachine(this, new MP4Reader(this)); |
| michael@0 | 24 | } |
| michael@0 | 25 | |
| michael@0 | 26 | bool |
| michael@0 | 27 | MP4Decoder::GetSupportedCodecs(const nsACString& aType, |
| michael@0 | 28 | char const *const ** aCodecList) |
| michael@0 | 29 | { |
| michael@0 | 30 | if (!IsEnabled()) { |
| michael@0 | 31 | return false; |
| michael@0 | 32 | } |
| michael@0 | 33 | |
| michael@0 | 34 | // AAC in M4A. |
| michael@0 | 35 | static char const *const aacAudioCodecs[] = { |
| michael@0 | 36 | "mp4a.40.2", // AAC-LC |
| michael@0 | 37 | // TODO: AAC-HE ? |
| michael@0 | 38 | nullptr |
| michael@0 | 39 | }; |
| michael@0 | 40 | if (aType.EqualsASCII("audio/mp4") || |
| michael@0 | 41 | aType.EqualsASCII("audio/x-m4a")) { |
| michael@0 | 42 | if (aCodecList) { |
| michael@0 | 43 | *aCodecList = aacAudioCodecs; |
| michael@0 | 44 | } |
| michael@0 | 45 | return true; |
| michael@0 | 46 | } |
| michael@0 | 47 | |
| michael@0 | 48 | // H.264 + AAC in MP4. |
| michael@0 | 49 | static char const *const h264Codecs[] = { |
| michael@0 | 50 | "avc1.42E01E", // H.264 Constrained Baseline Profile Level 3.0 |
| michael@0 | 51 | "avc1.42001E", // H.264 Baseline Profile Level 3.0 |
| michael@0 | 52 | "avc1.58A01E", // H.264 Extended Profile Level 3.0 |
| michael@0 | 53 | "avc1.4D401E", // H.264 Main Profile Level 3.0 |
| michael@0 | 54 | "avc1.64001E", // H.264 High Profile Level 3.0 |
| michael@0 | 55 | "avc1.64001F", // H.264 High Profile Level 3.1 |
| michael@0 | 56 | "mp4a.40.2", // AAC-LC |
| michael@0 | 57 | // TODO: There must be more profiles here? |
| michael@0 | 58 | nullptr |
| michael@0 | 59 | }; |
| michael@0 | 60 | if (aType.EqualsASCII("video/mp4")) { |
| michael@0 | 61 | if (aCodecList) { |
| michael@0 | 62 | *aCodecList = h264Codecs; |
| michael@0 | 63 | } |
| michael@0 | 64 | return true; |
| michael@0 | 65 | } |
| michael@0 | 66 | |
| michael@0 | 67 | return false; |
| michael@0 | 68 | } |
| michael@0 | 69 | |
| michael@0 | 70 | static bool |
| michael@0 | 71 | IsFFmpegAvailable() |
| michael@0 | 72 | { |
| michael@0 | 73 | #ifndef MOZ_FFMPEG |
| michael@0 | 74 | return false; |
| michael@0 | 75 | #else |
| michael@0 | 76 | if (!Preferences::GetBool("media.fragmented-mp4.ffmpeg.enabled", false)) { |
| michael@0 | 77 | return false; |
| michael@0 | 78 | } |
| michael@0 | 79 | |
| michael@0 | 80 | // If we can link to FFmpeg, then we can almost certainly play H264 and AAC |
| michael@0 | 81 | // with it. |
| michael@0 | 82 | return FFmpegDecoderModule::Link(); |
| michael@0 | 83 | #endif |
| michael@0 | 84 | } |
| michael@0 | 85 | |
| michael@0 | 86 | static bool |
| michael@0 | 87 | HavePlatformMPEGDecoders() |
| michael@0 | 88 | { |
| michael@0 | 89 | return Preferences::GetBool("media.fragmented-mp4.use-blank-decoder") || |
| michael@0 | 90 | #ifdef XP_WIN |
| michael@0 | 91 | // We have H.264/AAC platform decoders on Windows Vista and up. |
| michael@0 | 92 | IsVistaOrLater() || |
| michael@0 | 93 | #endif |
| michael@0 | 94 | IsFFmpegAvailable() || |
| michael@0 | 95 | // TODO: Other platforms... |
| michael@0 | 96 | false; |
| michael@0 | 97 | } |
| michael@0 | 98 | |
| michael@0 | 99 | /* static */ |
| michael@0 | 100 | bool |
| michael@0 | 101 | MP4Decoder::IsEnabled() |
| michael@0 | 102 | { |
| michael@0 | 103 | return HavePlatformMPEGDecoders() && |
| michael@0 | 104 | Preferences::GetBool("media.fragmented-mp4.enabled"); |
| michael@0 | 105 | } |
| michael@0 | 106 | |
| michael@0 | 107 | } // namespace mozilla |
| michael@0 | 108 |
