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/* -*- 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 "OggDecoder.h"
#include "MediaContainerType.h"
#include "MediaDecoder.h"
#include "mozilla/StaticPrefs_media.h"
#include "nsMimeTypes.h"
namespace mozilla {
/* static */
bool OggDecoder::IsSupportedType(const MediaContainerType& aContainerType) {
if (!StaticPrefs::media_ogg_enabled()) {
return false;
}
if (aContainerType.Type() != MEDIAMIMETYPE(AUDIO_OGG) &&
aContainerType.Type() != MEDIAMIMETYPE(VIDEO_OGG) &&
aContainerType.Type() != MEDIAMIMETYPE("application/ogg")) {
return false;
}
const bool isOggVideo = (aContainerType.Type() != MEDIAMIMETYPE(AUDIO_OGG));
const MediaCodecs& codecs = aContainerType.ExtendedType().Codecs();
if (codecs.IsEmpty()) {
// Ogg guarantees that the only codecs it contained are supported.
return true;
}
// Verify that all the codecs specified are ones that we expect that
// we can play.
for (const auto& codec : codecs.Range()) {
if ((MediaDecoder::IsOpusEnabled() && codec.EqualsLiteral("opus")) ||
codec.EqualsLiteral("vorbis") || codec.EqualsLiteral("flac")) {
continue;
}
// Note: Only accept Theora in a video container type, not in an audio
// container type.
if (isOggVideo && codec.EqualsLiteral("theora")) {
continue;
}
// Some unsupported codec.
return false;
}
return true;
}
/* static */
nsTArray<UniquePtr<TrackInfo>> OggDecoder::GetTracksInfo(
const MediaContainerType& aType) {
nsTArray<UniquePtr<TrackInfo>> tracks;
if (!IsSupportedType(aType)) {
return tracks;
}
const MediaCodecs& codecs = aType.ExtendedType().Codecs();
if (codecs.IsEmpty()) {
// Codecs must be specified for ogg as it can't be implied.
return tracks;
}
for (const auto& codec : codecs.Range()) {
if (codec.EqualsLiteral("opus") || codec.EqualsLiteral("vorbis") ||
codec.EqualsLiteral("flac")) {
tracks.AppendElement(
CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
"audio/"_ns + NS_ConvertUTF16toUTF8(codec), aType));
} else {
MOZ_ASSERT(codec.EqualsLiteral("theora"));
tracks.AppendElement(
CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
"video/"_ns + NS_ConvertUTF16toUTF8(codec), aType));
}
}
return tracks;
}
} // namespace mozilla