зеркало из https://github.com/mozilla/gecko-dev.git
126 строки
3.6 KiB
C++
126 строки
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "WebMDecoder.h"
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#include <utility>
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#include "mozilla/Preferences.h"
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#include "mozilla/StaticPrefs_media.h"
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#ifdef MOZ_AV1
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# include "AOMDecoder.h"
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#endif
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#include "MediaContainerType.h"
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#include "PDMFactory.h"
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#include "VideoUtils.h"
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namespace mozilla {
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/* static */
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nsTArray<UniquePtr<TrackInfo>> WebMDecoder::GetTracksInfo(
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const MediaContainerType& aType, MediaResult& aError) {
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nsTArray<UniquePtr<TrackInfo>> tracks;
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const bool isVideo = aType.Type() == MEDIAMIMETYPE("video/webm");
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if (aType.Type() != MEDIAMIMETYPE("audio/webm") && !isVideo) {
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aError = MediaResult(
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NS_ERROR_DOM_MEDIA_FATAL_ERR,
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RESULT_DETAIL("Invalid type:%s", aType.Type().AsString().get()));
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return tracks;
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}
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aError = NS_OK;
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const MediaCodecs& codecs = aType.ExtendedType().Codecs();
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if (codecs.IsEmpty()) {
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return tracks;
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}
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for (const auto& codec : codecs.Range()) {
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if (codec.EqualsLiteral("opus") || codec.EqualsLiteral("vorbis")) {
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tracks.AppendElement(
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CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
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NS_LITERAL_CSTRING("audio/") + NS_ConvertUTF16toUTF8(codec),
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aType));
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continue;
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}
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if (isVideo) {
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UniquePtr<TrackInfo> trackInfo;
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if (IsVP9CodecString(codec)) {
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trackInfo = CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
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NS_LITERAL_CSTRING("video/vp9"), aType);
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} else if (IsVP8CodecString(codec)) {
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trackInfo = CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
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NS_LITERAL_CSTRING("video/vp8"), aType);
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}
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if (trackInfo) {
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uint8_t profile = 0;
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uint8_t level = 0;
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uint8_t bitDepth = 0;
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if (ExtractVPXCodecDetails(codec, profile, level, bitDepth)) {
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trackInfo->GetAsVideoInfo()->mColorDepth =
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gfx::ColorDepthForBitDepth(bitDepth);
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}
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tracks.AppendElement(std::move(trackInfo));
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continue;
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}
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}
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#ifdef MOZ_AV1
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if (StaticPrefs::media_av1_enabled() && IsAV1CodecString(codec)) {
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tracks.AppendElement(
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CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
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NS_LITERAL_CSTRING("video/av1"), aType));
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continue;
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}
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#endif
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// Unknown codec
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aError = MediaResult(
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NS_ERROR_DOM_MEDIA_FATAL_ERR,
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RESULT_DETAIL("Unknown codec:%s", NS_ConvertUTF16toUTF8(codec).get()));
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}
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return tracks;
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}
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/* static */
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bool WebMDecoder::IsSupportedType(const MediaContainerType& aContainerType) {
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if (!StaticPrefs::media_webm_enabled()) {
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return false;
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}
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MediaResult rv = NS_OK;
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auto tracks = GetTracksInfo(aContainerType, rv);
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if (NS_FAILED(rv)) {
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return false;
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}
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if (tracks.IsEmpty()) {
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// WebM guarantees that the only codecs it contained are vp8, vp9, opus or
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// vorbis.
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return true;
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}
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// Verify that we have a PDM that supports the whitelisted types, include
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// color depth
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RefPtr<PDMFactory> platform = new PDMFactory();
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for (const auto& track : tracks) {
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if (!track || !platform->Supports(*track, nullptr /* diagnostic */)) {
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return false;
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}
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}
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return true;
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}
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/* static */
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nsTArray<UniquePtr<TrackInfo>> WebMDecoder::GetTracksInfo(
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const MediaContainerType& aType) {
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MediaResult rv = NS_OK;
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return GetTracksInfo(aType, rv);
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}
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} // namespace mozilla
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