зеркало из https://github.com/mozilla/gecko-dev.git
773 строки
22 KiB
C++
773 строки
22 KiB
C++
/* 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 "VideoUtils.h"
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#include <functional>
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#include <stdint.h>
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#include "CubebUtils.h"
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#include "ImageContainer.h"
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#include "MediaContainerType.h"
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#include "MediaResource.h"
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#include "TimeUnits.h"
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#include "VorbisUtils.h"
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#include "mozilla/Base64.h"
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#include "mozilla/SharedThreadPool.h"
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#include "mozilla/StaticPrefs.h"
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#include "mozilla/SystemGroup.h"
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#include "mozilla/TaskCategory.h"
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#include "mozilla/TaskQueue.h"
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#include "mozilla/Telemetry.h"
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#include "nsCharSeparatedTokenizer.h"
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#include "nsContentTypeParser.h"
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#include "nsIConsoleService.h"
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#include "nsIRandomGenerator.h"
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#include "nsIServiceManager.h"
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#include "nsMathUtils.h"
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#include "nsServiceManagerUtils.h"
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#include "nsThreadUtils.h"
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namespace mozilla {
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NS_NAMED_LITERAL_CSTRING(kEMEKeySystemClearkey, "org.w3.clearkey");
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NS_NAMED_LITERAL_CSTRING(kEMEKeySystemWidevine, "com.widevine.alpha");
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using layers::PlanarYCbCrImage;
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using media::TimeUnit;
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CheckedInt64 SaferMultDiv(int64_t aValue, uint64_t aMul, uint64_t aDiv) {
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if (aMul > INT64_MAX || aDiv > INT64_MAX) {
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return CheckedInt64(INT64_MAX) + 1; // Return an invalid checked int.
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}
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int64_t mul = aMul;
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int64_t div = aDiv;
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int64_t major = aValue / div;
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int64_t remainder = aValue % div;
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return CheckedInt64(remainder) * mul / div + CheckedInt64(major) * mul;
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}
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// Converts from number of audio frames to microseconds, given the specified
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// audio rate.
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CheckedInt64 FramesToUsecs(int64_t aFrames, uint32_t aRate) {
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return SaferMultDiv(aFrames, USECS_PER_S, aRate);
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}
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TimeUnit FramesToTimeUnit(int64_t aFrames, uint32_t aRate) {
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int64_t major = aFrames / aRate;
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int64_t remainder = aFrames % aRate;
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return TimeUnit::FromMicroseconds(major) * USECS_PER_S +
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(TimeUnit::FromMicroseconds(remainder) * USECS_PER_S) / aRate;
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}
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// Converts from microseconds to number of audio frames, given the specified
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// audio rate.
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CheckedInt64 UsecsToFrames(int64_t aUsecs, uint32_t aRate) {
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return SaferMultDiv(aUsecs, aRate, USECS_PER_S);
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}
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// Format TimeUnit as number of frames at given rate.
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CheckedInt64 TimeUnitToFrames(const TimeUnit& aTime, uint32_t aRate) {
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return UsecsToFrames(aTime.ToMicroseconds(), aRate);
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}
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nsresult SecondsToUsecs(double aSeconds, int64_t& aOutUsecs) {
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if (aSeconds * double(USECS_PER_S) > INT64_MAX) {
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return NS_ERROR_FAILURE;
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}
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aOutUsecs = int64_t(aSeconds * double(USECS_PER_S));
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return NS_OK;
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}
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static int32_t ConditionDimension(float aValue)
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{
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// This will exclude NaNs and too-big values.
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if (aValue > 1.0 && aValue <= INT32_MAX)
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return int32_t(NS_round(aValue));
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return 0;
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}
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void
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ScaleDisplayByAspectRatio(gfx::IntSize& aDisplay, float aAspectRatio)
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{
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if (aAspectRatio > 1.0) {
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// Increase the intrinsic width
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aDisplay.width = ConditionDimension(aAspectRatio * aDisplay.width);
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} else {
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// Increase the intrinsic height
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aDisplay.height = ConditionDimension(aDisplay.height / aAspectRatio);
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}
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}
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static int64_t BytesToTime(int64_t offset, int64_t length, int64_t durationUs) {
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NS_ASSERTION(length > 0, "Must have positive length");
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double r = double(offset) / double(length);
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if (r > 1.0)
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r = 1.0;
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return int64_t(double(durationUs) * r);
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}
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media::TimeIntervals GetEstimatedBufferedTimeRanges(mozilla::MediaResource* aStream,
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int64_t aDurationUsecs)
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{
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media::TimeIntervals buffered;
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// Nothing to cache if the media takes 0us to play.
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if (aDurationUsecs <= 0 || !aStream)
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return buffered;
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// Special case completely cached files. This also handles local files.
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if (aStream->IsDataCachedToEndOfResource(0)) {
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buffered +=
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media::TimeInterval(TimeUnit::Zero(),
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TimeUnit::FromMicroseconds(aDurationUsecs));
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return buffered;
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}
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int64_t totalBytes = aStream->GetLength();
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// If we can't determine the total size, pretend that we have nothing
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// buffered. This will put us in a state of eternally-low-on-undecoded-data
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// which is not great, but about the best we can do.
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if (totalBytes <= 0)
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return buffered;
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int64_t startOffset = aStream->GetNextCachedData(0);
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while (startOffset >= 0) {
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int64_t endOffset = aStream->GetCachedDataEnd(startOffset);
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// Bytes [startOffset..endOffset] are cached.
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NS_ASSERTION(startOffset >= 0, "Integer underflow in GetBuffered");
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NS_ASSERTION(endOffset >= 0, "Integer underflow in GetBuffered");
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int64_t startUs = BytesToTime(startOffset, totalBytes, aDurationUsecs);
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int64_t endUs = BytesToTime(endOffset, totalBytes, aDurationUsecs);
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if (startUs != endUs) {
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buffered +=
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media::TimeInterval(TimeUnit::FromMicroseconds(startUs),
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TimeUnit::FromMicroseconds(endUs));
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}
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startOffset = aStream->GetNextCachedData(endOffset);
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}
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return buffered;
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}
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void DownmixStereoToMono(mozilla::AudioDataValue* aBuffer,
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uint32_t aFrames)
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{
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MOZ_ASSERT(aBuffer);
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const int channels = 2;
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for (uint32_t fIdx = 0; fIdx < aFrames; ++fIdx) {
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#ifdef MOZ_SAMPLE_TYPE_FLOAT32
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float sample = 0.0;
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#else
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int sample = 0;
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#endif
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// The sample of the buffer would be interleaved.
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sample = (aBuffer[fIdx*channels] + aBuffer[fIdx*channels + 1]) * 0.5;
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aBuffer[fIdx*channels] = aBuffer[fIdx*channels + 1] = sample;
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}
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}
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uint32_t
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DecideAudioPlaybackChannels(const AudioInfo& info)
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{
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if (StaticPrefs::accessibility_monoaudio_enable()) {
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return 1;
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}
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if (StaticPrefs::MediaForcestereoEnabled()) {
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return 2;
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}
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return info.mChannels;
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}
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bool
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IsDefaultPlaybackDeviceMono()
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{
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return CubebUtils::MaxNumberOfChannels() == 1;
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}
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bool
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IsVideoContentType(const nsCString& aContentType)
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{
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NS_NAMED_LITERAL_CSTRING(video, "video");
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if (FindInReadable(video, aContentType)) {
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return true;
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}
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return false;
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}
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bool
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IsValidVideoRegion(const gfx::IntSize& aFrame,
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const gfx::IntRect& aPicture,
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const gfx::IntSize& aDisplay)
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{
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return
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aFrame.width <= PlanarYCbCrImage::MAX_DIMENSION &&
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aFrame.height <= PlanarYCbCrImage::MAX_DIMENSION &&
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aFrame.width * aFrame.height <= MAX_VIDEO_WIDTH * MAX_VIDEO_HEIGHT &&
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aFrame.width * aFrame.height != 0 &&
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aPicture.width <= PlanarYCbCrImage::MAX_DIMENSION &&
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aPicture.x < PlanarYCbCrImage::MAX_DIMENSION &&
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aPicture.x + aPicture.width < PlanarYCbCrImage::MAX_DIMENSION &&
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aPicture.height <= PlanarYCbCrImage::MAX_DIMENSION &&
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aPicture.y < PlanarYCbCrImage::MAX_DIMENSION &&
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aPicture.y + aPicture.height < PlanarYCbCrImage::MAX_DIMENSION &&
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aPicture.width * aPicture.height <= MAX_VIDEO_WIDTH * MAX_VIDEO_HEIGHT &&
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aPicture.width * aPicture.height != 0 &&
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aDisplay.width <= PlanarYCbCrImage::MAX_DIMENSION &&
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aDisplay.height <= PlanarYCbCrImage::MAX_DIMENSION &&
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aDisplay.width * aDisplay.height <= MAX_VIDEO_WIDTH * MAX_VIDEO_HEIGHT &&
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aDisplay.width * aDisplay.height != 0;
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}
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already_AddRefed<SharedThreadPool> GetMediaThreadPool(MediaThreadType aType)
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{
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const char *name;
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switch (aType) {
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case MediaThreadType::PLATFORM_DECODER:
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name = "MediaPDecoder";
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break;
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case MediaThreadType::MSG_CONTROL:
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name = "MSGControl";
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break;
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case MediaThreadType::WEBRTC_DECODER:
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name = "WebRTCPD";
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break;
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default:
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MOZ_FALLTHROUGH_ASSERT("Unexpected MediaThreadType");
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case MediaThreadType::PLAYBACK:
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name = "MediaPlayback";
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break;
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}
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static const uint32_t kMediaThreadPoolDefaultCount = 4;
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RefPtr<SharedThreadPool> pool = SharedThreadPool::
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Get(nsDependentCString(name), kMediaThreadPoolDefaultCount);
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// Ensure a larger stack for platform decoder threads
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if (aType == MediaThreadType::PLATFORM_DECODER) {
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const uint32_t minStackSize = 512*1024;
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uint32_t stackSize;
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MOZ_ALWAYS_SUCCEEDS(pool->GetThreadStackSize(&stackSize));
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if (stackSize < minStackSize) {
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MOZ_ALWAYS_SUCCEEDS(pool->SetThreadStackSize(minStackSize));
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}
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}
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return pool.forget();
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}
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bool
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ExtractVPXCodecDetails(const nsAString& aCodec,
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uint8_t& aProfile,
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uint8_t& aLevel,
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uint8_t& aBitDepth)
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{
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uint8_t dummyChromaSubsampling = 1;
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VideoColorSpace dummyColorspace;
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return ExtractVPXCodecDetails(aCodec,
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aProfile,
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aLevel,
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aBitDepth,
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dummyChromaSubsampling,
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dummyColorspace);
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}
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bool ExtractVPXCodecDetails(const nsAString& aCodec,
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uint8_t& aProfile,
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uint8_t& aLevel,
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uint8_t& aBitDepth,
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uint8_t& aChromaSubsampling,
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VideoColorSpace& aColorSpace)
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{
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// Assign default value.
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aChromaSubsampling = 1;
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auto splitter = aCodec.Split(u'.');
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auto fieldsItr = splitter.begin();
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auto fourCC = *fieldsItr;
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if (!fourCC.EqualsLiteral("vp09") && !fourCC.EqualsLiteral("vp08")) {
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// Invalid 4CC
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return false;
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}
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++fieldsItr;
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uint8_t *fields[] = { &aProfile, &aLevel, &aBitDepth, &aChromaSubsampling,
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&aColorSpace.mPrimaryId, &aColorSpace.mTransferId,
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&aColorSpace.mMatrixId, &aColorSpace.mRangeId };
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int fieldsCount = 0;
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nsresult rv;
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for (; fieldsItr != splitter.end(); ++fieldsItr, ++fieldsCount) {
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if (fieldsCount > 7) {
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// No more than 8 fields are expected.
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return false;
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}
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*(fields[fieldsCount]) =
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static_cast<uint8_t>(PromiseFlatString((*fieldsItr)).ToInteger(&rv, 10));
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// We got invalid field value, parsing error.
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NS_ENSURE_SUCCESS(rv, false);
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}
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// Mandatory Fields
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// <sample entry 4CC>.<profile>.<level>.<bitDepth>.
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// Optional Fields
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// <chromaSubsampling>.<colourPrimaries>.<transferCharacteristics>.
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// <matrixCoefficients>.<videoFullRangeFlag>
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// First three fields are mandatory(we have parsed 4CC).
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if (fieldsCount < 3) {
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// Invalid number of fields.
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return false;
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}
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// Start to validate the parsing value.
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// profile should be 0,1,2 or 3.
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// See https://www.webmproject.org/vp9/profiles/
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// We don't support more than profile 2
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if (aProfile > 2) {
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// Invalid profile.
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return false;
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}
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// level, See https://www.webmproject.org/vp9/mp4/#semantics_1
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switch (aLevel) {
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case 10:
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case 11:
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case 20:
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case 21:
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case 30:
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case 31:
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case 40:
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case 41:
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case 50:
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case 51:
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case 52:
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case 60:
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case 61:
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case 62:
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break;
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default:
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// Invalid level.
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return false;
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}
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if (aBitDepth != 8 && aBitDepth != 10 && aBitDepth != 12) {
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// Invalid bitDepth:
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return false;
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}
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if (fieldsCount == 3) {
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// No more options.
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return true;
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}
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// chromaSubsampling should be 0,1,2,3...4~7 are reserved.
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if (aChromaSubsampling > 3) {
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return false;
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}
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if (fieldsCount == 4) {
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// No more options.
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return true;
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}
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// It is an integer that is defined by the "Colour primaries"
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// section of ISO/IEC 23001-8:2016 Table 2.
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// We treat reserved value as false case.
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const auto& primaryId = aColorSpace.mPrimaryId;
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if (primaryId == 0 || primaryId == 3 || primaryId > 22) {
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// reserved value.
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return false;
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}
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if (primaryId > 12 && primaryId < 22) {
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// 13~21 are reserved values.
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return false;
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}
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if (fieldsCount == 5) {
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// No more options.
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return true;
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}
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// It is an integer that is defined by the
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// "Transfer characteristics" section of ISO/IEC 23001-8:2016 Table 3.
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// We treat reserved value as false case.
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const auto& transferId = aColorSpace.mTransferId;
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if (transferId == 0 || transferId == 3 || transferId > 18) {
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// reserved value.
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return false;
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}
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if (fieldsCount == 6) {
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// No more options.
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return true;
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}
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// It is an integer that is defined by the
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// "Matrix coefficients" section of ISO/IEC 23001-8:2016 Table 4.
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// We treat reserved value as false case.
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const auto& matrixId = aColorSpace.mMatrixId;
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if (matrixId == 3 || matrixId > 11) {
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return false;
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}
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// If matrixCoefficients is 0 (RGB), then chroma subsampling MUST be 3 (4:4:4).
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if (matrixId == 0 && aChromaSubsampling != 3) {
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return false;
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}
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if (fieldsCount == 7) {
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// No more options.
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return true;
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}
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// videoFullRangeFlag indicates the black level and range of the luma and
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// chroma signals. 0 = legal range (e.g. 16-235 for 8 bit sample depth);
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// 1 = full range (e.g. 0-255 for 8-bit sample depth).
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const auto& rangeId = aColorSpace.mRangeId;
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return rangeId <= 1;
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}
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bool
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ExtractH264CodecDetails(const nsAString& aCodec,
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uint8_t& aProfile,
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uint8_t& aConstraint,
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uint8_t& aLevel)
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{
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// H.264 codecs parameters have a type defined as avcN.PPCCLL, where
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// N = avc type. avc3 is avcc with SPS & PPS implicit (within stream)
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// PP = profile_idc, CC = constraint_set flags, LL = level_idc.
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// We ignore the constraint_set flags, as it's not clear from any
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// documentation what constraints the platform decoders support.
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// See http://blog.pearce.org.nz/2013/11/what-does-h264avc1-codecs-parameters.html
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// for more details.
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if (aCodec.Length() != strlen("avc1.PPCCLL")) {
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return false;
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}
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// Verify the codec starts with "avc1." or "avc3.".
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const nsAString& sample = Substring(aCodec, 0, 5);
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if (!sample.EqualsASCII("avc1.") && !sample.EqualsASCII("avc3.")) {
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return false;
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}
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// Extract the profile_idc, constraint_flags and level_idc.
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nsresult rv = NS_OK;
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aProfile = PromiseFlatString(Substring(aCodec, 5, 2)).ToInteger(&rv, 16);
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NS_ENSURE_SUCCESS(rv, false);
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// Constraint flags are stored on the 6 most significant bits, first two bits
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// are reserved_zero_2bits.
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aConstraint = PromiseFlatString(Substring(aCodec, 7, 2)).ToInteger(&rv, 16);
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NS_ENSURE_SUCCESS(rv, false);
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aLevel = PromiseFlatString(Substring(aCodec, 9, 2)).ToInteger(&rv, 16);
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NS_ENSURE_SUCCESS(rv, false);
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if (aLevel == 9) {
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aLevel = H264_LEVEL_1_b;
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} else if (aLevel <= 5) {
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aLevel *= 10;
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}
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// We only make sure constraints is above 4 for collection perspective
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// otherwise collect 0 for unknown.
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Telemetry::Accumulate(Telemetry::VIDEO_CANPLAYTYPE_H264_CONSTRAINT_SET_FLAG,
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aConstraint >= 4 ? aConstraint : 0);
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// 244 is the highest meaningful profile value (High 4:4:4 Intra Profile)
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// that can be represented as single hex byte, otherwise collect 0 for unknown.
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Telemetry::Accumulate(Telemetry::VIDEO_CANPLAYTYPE_H264_PROFILE,
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aProfile <= 244 ? aProfile : 0);
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// Make sure aLevel represents a value between levels 1 and 5.2,
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// otherwise collect 0 for unknown.
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Telemetry::Accumulate(Telemetry::VIDEO_CANPLAYTYPE_H264_LEVEL,
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(aLevel >= 10 && aLevel <= 52) ? aLevel : 0);
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return true;
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}
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nsresult
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GenerateRandomName(nsCString& aOutSalt, uint32_t aLength)
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{
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nsresult rv;
|
|
nsCOMPtr<nsIRandomGenerator> rg =
|
|
do_GetService("@mozilla.org/security/random-generator;1", &rv);
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
// For each three bytes of random data we will get four bytes of ASCII.
|
|
const uint32_t requiredBytesLength =
|
|
static_cast<uint32_t>((aLength + 3) / 4 * 3);
|
|
|
|
uint8_t* buffer;
|
|
rv = rg->GenerateRandomBytes(requiredBytesLength, &buffer);
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
nsAutoCString temp;
|
|
nsDependentCSubstring randomData(reinterpret_cast<const char*>(buffer),
|
|
requiredBytesLength);
|
|
rv = Base64Encode(randomData, temp);
|
|
free(buffer);
|
|
buffer = nullptr;
|
|
if (NS_FAILED (rv)) return rv;
|
|
|
|
aOutSalt = temp;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
GenerateRandomPathName(nsCString& aOutSalt, uint32_t aLength)
|
|
{
|
|
nsresult rv = GenerateRandomName(aOutSalt, aLength);
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
// Base64 characters are alphanumeric (a-zA-Z0-9) and '+' and '/', so we need
|
|
// to replace illegal characters -- notably '/'
|
|
aOutSalt.ReplaceChar(FILE_PATH_SEPARATOR FILE_ILLEGAL_CHARACTERS, '_');
|
|
return NS_OK;
|
|
}
|
|
|
|
already_AddRefed<TaskQueue>
|
|
CreateMediaDecodeTaskQueue(const char* aName)
|
|
{
|
|
RefPtr<TaskQueue> queue = new TaskQueue(
|
|
GetMediaThreadPool(MediaThreadType::PLATFORM_DECODER), aName);
|
|
return queue.forget();
|
|
}
|
|
|
|
void
|
|
SimpleTimer::Cancel() {
|
|
if (mTimer) {
|
|
#ifdef DEBUG
|
|
nsCOMPtr<nsIEventTarget> target;
|
|
mTimer->GetTarget(getter_AddRefs(target));
|
|
bool onCurrent;
|
|
nsresult rv = target->IsOnCurrentThread(&onCurrent);
|
|
MOZ_ASSERT(NS_SUCCEEDED(rv) && onCurrent);
|
|
#endif
|
|
mTimer->Cancel();
|
|
mTimer = nullptr;
|
|
}
|
|
mTask = nullptr;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
SimpleTimer::Notify(nsITimer *timer) {
|
|
RefPtr<SimpleTimer> deathGrip(this);
|
|
if (mTask) {
|
|
mTask->Run();
|
|
mTask = nullptr;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
SimpleTimer::GetName(nsACString& aName)
|
|
{
|
|
aName.AssignLiteral("SimpleTimer");
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
SimpleTimer::Init(nsIRunnable* aTask, uint32_t aTimeoutMs, nsIEventTarget* aTarget)
|
|
{
|
|
nsresult rv;
|
|
|
|
// Get target thread first, so we don't have to cancel the timer if it fails.
|
|
nsCOMPtr<nsIEventTarget> target;
|
|
if (aTarget) {
|
|
target = aTarget;
|
|
} else {
|
|
target = GetMainThreadEventTarget();
|
|
if (!target) {
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
}
|
|
}
|
|
|
|
rv = NS_NewTimerWithCallback(getter_AddRefs(mTimer),
|
|
this, aTimeoutMs, nsITimer::TYPE_ONE_SHOT,
|
|
target);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
mTask = aTask;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMPL_ISUPPORTS(SimpleTimer, nsITimerCallback, nsINamed)
|
|
|
|
already_AddRefed<SimpleTimer>
|
|
SimpleTimer::Create(nsIRunnable* aTask, uint32_t aTimeoutMs, nsIEventTarget* aTarget)
|
|
{
|
|
RefPtr<SimpleTimer> t(new SimpleTimer());
|
|
if (NS_FAILED(t->Init(aTask, aTimeoutMs, aTarget))) {
|
|
return nullptr;
|
|
}
|
|
return t.forget();
|
|
}
|
|
|
|
void
|
|
LogToBrowserConsole(const nsAString& aMsg)
|
|
{
|
|
if (!NS_IsMainThread()) {
|
|
nsString msg(aMsg);
|
|
nsCOMPtr<nsIRunnable> task = NS_NewRunnableFunction(
|
|
"LogToBrowserConsole", [msg]() { LogToBrowserConsole(msg); });
|
|
SystemGroup::Dispatch(TaskCategory::Other, task.forget());
|
|
return;
|
|
}
|
|
nsCOMPtr<nsIConsoleService> console(
|
|
do_GetService("@mozilla.org/consoleservice;1"));
|
|
if (!console) {
|
|
NS_WARNING("Failed to log message to console.");
|
|
return;
|
|
}
|
|
nsAutoString msg(aMsg);
|
|
console->LogStringMessage(msg.get());
|
|
}
|
|
|
|
bool
|
|
ParseCodecsString(const nsAString& aCodecs, nsTArray<nsString>& aOutCodecs)
|
|
{
|
|
aOutCodecs.Clear();
|
|
bool expectMoreTokens = false;
|
|
nsCharSeparatedTokenizer tokenizer(aCodecs, ',');
|
|
while (tokenizer.hasMoreTokens()) {
|
|
const nsAString& token = tokenizer.nextToken();
|
|
expectMoreTokens = tokenizer.separatorAfterCurrentToken();
|
|
aOutCodecs.AppendElement(token);
|
|
}
|
|
if (expectMoreTokens) {
|
|
// Last codec name was empty
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
ParseMIMETypeString(const nsAString& aMIMEType,
|
|
nsString& aOutContainerType,
|
|
nsTArray<nsString>& aOutCodecs)
|
|
{
|
|
nsContentTypeParser parser(aMIMEType);
|
|
nsresult rv = parser.GetType(aOutContainerType);
|
|
if (NS_FAILED(rv)) {
|
|
return false;
|
|
}
|
|
|
|
nsString codecsStr;
|
|
parser.GetParameter("codecs", codecsStr);
|
|
return ParseCodecsString(codecsStr, aOutCodecs);
|
|
}
|
|
|
|
template <int N>
|
|
static bool
|
|
StartsWith(const nsACString& string, const char (&prefix)[N])
|
|
{
|
|
if (N - 1 > string.Length()) {
|
|
return false;
|
|
}
|
|
return memcmp(string.Data(), prefix, N - 1) == 0;
|
|
}
|
|
|
|
bool
|
|
IsH264CodecString(const nsAString& aCodec)
|
|
{
|
|
uint8_t profile = 0;
|
|
uint8_t constraint = 0;
|
|
uint8_t level = 0;
|
|
return ExtractH264CodecDetails(aCodec, profile, constraint, level);
|
|
}
|
|
|
|
bool
|
|
IsAACCodecString(const nsAString& aCodec)
|
|
{
|
|
return
|
|
aCodec.EqualsLiteral("mp4a.40.2") || // MPEG4 AAC-LC
|
|
aCodec.EqualsLiteral("mp4a.40.02") || // MPEG4 AAC-LC(for compatibility)
|
|
aCodec.EqualsLiteral("mp4a.40.5") || // MPEG4 HE-AAC
|
|
aCodec.EqualsLiteral("mp4a.40.05") || // MPEG4 HE-AAC(for compatibility)
|
|
aCodec.EqualsLiteral("mp4a.67") || // MPEG2 AAC-LC
|
|
aCodec.EqualsLiteral("mp4a.40.29"); // MPEG4 HE-AACv2
|
|
}
|
|
|
|
bool
|
|
IsVP8CodecString(const nsAString& aCodec)
|
|
{
|
|
uint8_t profile = 0;
|
|
uint8_t level = 0;
|
|
uint8_t bitDepth = 0;
|
|
return aCodec.EqualsLiteral("vp8") ||
|
|
aCodec.EqualsLiteral("vp8.0") ||
|
|
(StartsWith(NS_ConvertUTF16toUTF8(aCodec), "vp08") &&
|
|
ExtractVPXCodecDetails(aCodec, profile, level, bitDepth));
|
|
}
|
|
|
|
bool
|
|
IsVP9CodecString(const nsAString& aCodec)
|
|
{
|
|
uint8_t profile = 0;
|
|
uint8_t level = 0;
|
|
uint8_t bitDepth = 0;
|
|
return aCodec.EqualsLiteral("vp9") ||
|
|
aCodec.EqualsLiteral("vp9.0") ||
|
|
(StartsWith(NS_ConvertUTF16toUTF8(aCodec), "vp09") &&
|
|
ExtractVPXCodecDetails(aCodec, profile, level, bitDepth));
|
|
}
|
|
|
|
bool
|
|
IsAV1CodecString(const nsAString& aCodec)
|
|
{
|
|
return aCodec.EqualsLiteral("av1"); // AV1
|
|
}
|
|
|
|
UniquePtr<TrackInfo>
|
|
CreateTrackInfoWithMIMEType(const nsACString& aCodecMIMEType)
|
|
{
|
|
UniquePtr<TrackInfo> trackInfo;
|
|
if (StartsWith(aCodecMIMEType, "audio/")) {
|
|
trackInfo.reset(new AudioInfo());
|
|
trackInfo->mMimeType = aCodecMIMEType;
|
|
} else if (StartsWith(aCodecMIMEType, "video/")) {
|
|
trackInfo.reset(new VideoInfo());
|
|
trackInfo->mMimeType = aCodecMIMEType;
|
|
}
|
|
return trackInfo;
|
|
}
|
|
|
|
UniquePtr<TrackInfo>
|
|
CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
|
|
const nsACString& aCodecMIMEType,
|
|
const MediaContainerType& aContainerType)
|
|
{
|
|
UniquePtr<TrackInfo> trackInfo = CreateTrackInfoWithMIMEType(aCodecMIMEType);
|
|
if (trackInfo) {
|
|
VideoInfo* videoInfo = trackInfo->GetAsVideoInfo();
|
|
if (videoInfo) {
|
|
Maybe<int32_t> maybeWidth = aContainerType.ExtendedType().GetWidth();
|
|
if (maybeWidth && *maybeWidth > 0) {
|
|
videoInfo->mImage.width = *maybeWidth;
|
|
}
|
|
Maybe<int32_t> maybeHeight = aContainerType.ExtendedType().GetHeight();
|
|
if (maybeHeight && *maybeHeight > 0) {
|
|
videoInfo->mImage.height = *maybeHeight;
|
|
}
|
|
} else if (trackInfo->GetAsAudioInfo()) {
|
|
AudioInfo* audioInfo = trackInfo->GetAsAudioInfo();
|
|
Maybe<int32_t> maybeChannels =
|
|
aContainerType.ExtendedType().GetChannels();
|
|
if (maybeChannels && *maybeChannels > 0) {
|
|
audioInfo->mChannels = *maybeChannels;
|
|
}
|
|
Maybe<int32_t> maybeSamplerate =
|
|
aContainerType.ExtendedType().GetSamplerate();
|
|
if (maybeSamplerate && *maybeSamplerate > 0) {
|
|
audioInfo->mRate = *maybeSamplerate;
|
|
}
|
|
}
|
|
}
|
|
return trackInfo;
|
|
}
|
|
|
|
} // end namespace mozilla
|