/src/mozilla-central/dom/media/ogg/OggDecoder.cpp
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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 "OggDecoder.h" |
8 | | #include "MediaContainerType.h" |
9 | | #include "MediaDecoder.h" |
10 | | #include "mozilla/StaticPrefs.h" |
11 | | #include "nsMimeTypes.h" |
12 | | |
13 | | namespace mozilla { |
14 | | |
15 | | /* static */ |
16 | | bool |
17 | | OggDecoder::IsSupportedType(const MediaContainerType& aContainerType) |
18 | 0 | { |
19 | 0 | if (!StaticPrefs::MediaOggEnabled()) { |
20 | 0 | return false; |
21 | 0 | } |
22 | 0 | |
23 | 0 | if (aContainerType.Type() != MEDIAMIMETYPE(AUDIO_OGG) && |
24 | 0 | aContainerType.Type() != MEDIAMIMETYPE(VIDEO_OGG) && |
25 | 0 | aContainerType.Type() != MEDIAMIMETYPE("application/ogg")) { |
26 | 0 | return false; |
27 | 0 | } |
28 | 0 | |
29 | 0 | const bool isOggVideo = (aContainerType.Type() != MEDIAMIMETYPE(AUDIO_OGG)); |
30 | 0 |
|
31 | 0 | const MediaCodecs& codecs = aContainerType.ExtendedType().Codecs(); |
32 | 0 | if (codecs.IsEmpty()) { |
33 | 0 | // Ogg guarantees that the only codecs it contained are supported. |
34 | 0 | return true; |
35 | 0 | } |
36 | 0 | // Verify that all the codecs specified are ones that we expect that |
37 | 0 | // we can play. |
38 | 0 | for (const auto& codec : codecs.Range()) { |
39 | 0 | if ((MediaDecoder::IsOpusEnabled() && codec.EqualsLiteral("opus")) || |
40 | 0 | codec.EqualsLiteral("vorbis") || |
41 | 0 | codec.EqualsLiteral("flac")) { |
42 | 0 | continue; |
43 | 0 | } |
44 | 0 | // Note: Only accept Theora in a video container type, not in an audio |
45 | 0 | // container type. |
46 | 0 | if (isOggVideo && codec.EqualsLiteral("theora")) { |
47 | 0 | continue; |
48 | 0 | } |
49 | 0 | // Some unsupported codec. |
50 | 0 | return false; |
51 | 0 | } |
52 | 0 | return true; |
53 | 0 | } |
54 | | |
55 | | /* static */ nsTArray<UniquePtr<TrackInfo>> |
56 | | OggDecoder::GetTracksInfo(const MediaContainerType& aType) |
57 | 0 | { |
58 | 0 | nsTArray<UniquePtr<TrackInfo>> tracks; |
59 | 0 | if (!IsSupportedType(aType)) { |
60 | 0 | return tracks; |
61 | 0 | } |
62 | 0 | |
63 | 0 | const MediaCodecs& codecs = aType.ExtendedType().Codecs(); |
64 | 0 | if (codecs.IsEmpty()) { |
65 | 0 | // Codecs must be specified for ogg as it can't be implied. |
66 | 0 | return tracks; |
67 | 0 | } |
68 | 0 | |
69 | 0 | for (const auto& codec : codecs.Range()) { |
70 | 0 | if (codec.EqualsLiteral("opus") || codec.EqualsLiteral("vorbis") || |
71 | 0 | codec.EqualsLiteral("flac")) { |
72 | 0 | tracks.AppendElement( |
73 | 0 | CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters( |
74 | 0 | NS_LITERAL_CSTRING("audio/") + NS_ConvertUTF16toUTF8(codec), aType)); |
75 | 0 | } else { |
76 | 0 | MOZ_ASSERT(codec.EqualsLiteral("theora")); |
77 | 0 | tracks.AppendElement( |
78 | 0 | CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters( |
79 | 0 | NS_LITERAL_CSTRING("video/") + NS_ConvertUTF16toUTF8(codec), aType)); |
80 | 0 | } |
81 | 0 | } |
82 | 0 | return tracks; |
83 | 0 | } |
84 | | |
85 | | } // namespace mozilla |