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0fab284fc7
This is currently not fully functional. The MediaStream always ends when the underlying resource ends. You can't use these APIs on a media element whose src is a MediaStream. Seeking or pausing the resource will cause problems. The media element does not play back in sync with the MediaStream.
411 lines
15 KiB
C++
411 lines
15 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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/* ***** BEGIN LICENSE BLOCK *****
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* Version: ML 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla code.
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*
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* The Initial Developer of the Original Code is the Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Chris Double <chris.double@double.co.nz>
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* Chris Pearce <chris@pearce.org.nz>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsBuiltinDecoder.h"
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#include "nsBuiltinDecoderReader.h"
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#include "nsBuiltinDecoderStateMachine.h"
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#include "VideoUtils.h"
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#include "mozilla/mozalloc.h"
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#include "mozilla/StandardInteger.h"
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using namespace mozilla;
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using mozilla::layers::ImageContainer;
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using mozilla::layers::PlanarYCbCrImage;
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// Verify these values are sane. Once we've checked the frame sizes, we then
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// can do less integer overflow checking.
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PR_STATIC_ASSERT(MAX_VIDEO_WIDTH < PlanarYCbCrImage::MAX_DIMENSION);
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PR_STATIC_ASSERT(MAX_VIDEO_HEIGHT < PlanarYCbCrImage::MAX_DIMENSION);
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PR_STATIC_ASSERT(PlanarYCbCrImage::MAX_DIMENSION < PR_UINT32_MAX / PlanarYCbCrImage::MAX_DIMENSION);
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// Un-comment to enable logging of seek bisections.
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//#define SEEK_LOGGING
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#ifdef PR_LOGGING
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extern PRLogModuleInfo* gBuiltinDecoderLog;
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#define LOG(type, msg) PR_LOG(gBuiltinDecoderLog, type, msg)
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#ifdef SEEK_LOGGING
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#define SEEK_LOG(type, msg) PR_LOG(gBuiltinDecoderLog, type, msg)
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#else
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#define SEEK_LOG(type, msg)
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#endif
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#else
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#define LOG(type, msg)
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#define SEEK_LOG(type, msg)
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#endif
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void
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AudioData::EnsureAudioBuffer()
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{
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if (mAudioBuffer)
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return;
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mAudioBuffer = SharedBuffer::Create(mFrames*mChannels*sizeof(AudioDataValue));
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AudioDataValue* data = static_cast<AudioDataValue*>(mAudioBuffer->Data());
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for (PRUint32 i = 0; i < mFrames; ++i) {
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for (PRUint32 j = 0; j < mChannels; ++j) {
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data[j*mFrames + i] = mAudioData[i*mChannels + j];
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}
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}
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}
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static bool
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ValidatePlane(const VideoData::YCbCrBuffer::Plane& aPlane)
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{
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return aPlane.mWidth <= PlanarYCbCrImage::MAX_DIMENSION &&
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aPlane.mHeight <= PlanarYCbCrImage::MAX_DIMENSION &&
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aPlane.mWidth * aPlane.mHeight < MAX_VIDEO_WIDTH * MAX_VIDEO_HEIGHT &&
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aPlane.mStride > 0;
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}
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bool
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nsVideoInfo::ValidateVideoRegion(const nsIntSize& aFrame,
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const nsIntRect& aPicture,
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const nsIntSize& 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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VideoData* VideoData::Create(nsVideoInfo& aInfo,
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ImageContainer* aContainer,
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PRInt64 aOffset,
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PRInt64 aTime,
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PRInt64 aEndTime,
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const YCbCrBuffer& aBuffer,
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bool aKeyframe,
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PRInt64 aTimecode,
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nsIntRect aPicture)
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{
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if (!aContainer) {
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// Create a dummy VideoData with no image. This gives us something to
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// send to media streams if necessary.
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nsAutoPtr<VideoData> v(new VideoData(aOffset,
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aTime,
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aEndTime,
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aKeyframe,
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aTimecode,
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aInfo.mDisplay));
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return v.forget();
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}
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// The following situation should never happen unless there is a bug
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// in the decoder
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if (aBuffer.mPlanes[1].mWidth != aBuffer.mPlanes[2].mWidth ||
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aBuffer.mPlanes[1].mHeight != aBuffer.mPlanes[2].mHeight) {
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NS_ERROR("C planes with different sizes");
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return nsnull;
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}
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// The following situations could be triggered by invalid input
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if (aPicture.width <= 0 || aPicture.height <= 0) {
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NS_WARNING("Empty picture rect");
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return nsnull;
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}
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if (!ValidatePlane(aBuffer.mPlanes[0]) || !ValidatePlane(aBuffer.mPlanes[1]) ||
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!ValidatePlane(aBuffer.mPlanes[2])) {
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NS_WARNING("Invalid plane size");
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return nsnull;
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}
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// Ensure the picture size specified in the headers can be extracted out of
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// the frame we've been supplied without indexing out of bounds.
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CheckedUint32 xLimit = aPicture.x + CheckedUint32(aPicture.width);
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CheckedUint32 yLimit = aPicture.y + CheckedUint32(aPicture.height);
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if (!xLimit.valid() || xLimit.value() > aBuffer.mPlanes[0].mStride ||
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!yLimit.valid() || yLimit.value() > aBuffer.mPlanes[0].mHeight)
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{
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// The specified picture dimensions can't be contained inside the video
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// frame, we'll stomp memory if we try to copy it. Fail.
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NS_WARNING("Overflowing picture rect");
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return nsnull;
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}
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nsAutoPtr<VideoData> v(new VideoData(aOffset,
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aTime,
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aEndTime,
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aKeyframe,
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aTimecode,
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aInfo.mDisplay));
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// Currently our decoder only knows how to output to PLANAR_YCBCR
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// format.
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Image::Format format = Image::PLANAR_YCBCR;
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v->mImage = aContainer->CreateImage(&format, 1);
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if (!v->mImage) {
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return nsnull;
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}
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NS_ASSERTION(v->mImage->GetFormat() == Image::PLANAR_YCBCR,
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"Wrong format?");
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PlanarYCbCrImage* videoImage = static_cast<PlanarYCbCrImage*>(v->mImage.get());
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PlanarYCbCrImage::Data data;
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data.mYChannel = aBuffer.mPlanes[0].mData;
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data.mYSize = gfxIntSize(aBuffer.mPlanes[0].mWidth, aBuffer.mPlanes[0].mHeight);
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data.mYStride = aBuffer.mPlanes[0].mStride;
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data.mCbChannel = aBuffer.mPlanes[1].mData;
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data.mCrChannel = aBuffer.mPlanes[2].mData;
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data.mCbCrSize = gfxIntSize(aBuffer.mPlanes[1].mWidth, aBuffer.mPlanes[1].mHeight);
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data.mCbCrStride = aBuffer.mPlanes[1].mStride;
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data.mPicX = aPicture.x;
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data.mPicY = aPicture.y;
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data.mPicSize = gfxIntSize(aPicture.width, aPicture.height);
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data.mStereoMode = aInfo.mStereoMode;
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videoImage->SetData(data); // Copies buffer
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return v.forget();
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}
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nsBuiltinDecoderReader::nsBuiltinDecoderReader(nsBuiltinDecoder* aDecoder)
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: mDecoder(aDecoder)
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{
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MOZ_COUNT_CTOR(nsBuiltinDecoderReader);
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}
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nsBuiltinDecoderReader::~nsBuiltinDecoderReader()
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{
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ResetDecode();
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MOZ_COUNT_DTOR(nsBuiltinDecoderReader);
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}
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nsresult nsBuiltinDecoderReader::ResetDecode()
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{
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nsresult res = NS_OK;
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mVideoQueue.Reset();
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mAudioQueue.Reset();
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return res;
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}
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VideoData* nsBuiltinDecoderReader::FindStartTime(PRInt64& aOutStartTime)
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{
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NS_ASSERTION(mDecoder->OnStateMachineThread() || mDecoder->OnDecodeThread(),
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"Should be on state machine or decode thread.");
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// Extract the start times of the bitstreams in order to calculate
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// the duration.
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PRInt64 videoStartTime = INT64_MAX;
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PRInt64 audioStartTime = INT64_MAX;
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VideoData* videoData = nsnull;
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if (HasVideo()) {
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videoData = DecodeToFirstData(&nsBuiltinDecoderReader::DecodeVideoFrame,
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mVideoQueue);
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if (videoData) {
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videoStartTime = videoData->mTime;
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}
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}
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if (HasAudio()) {
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AudioData* audioData = DecodeToFirstData(&nsBuiltinDecoderReader::DecodeAudioData,
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mAudioQueue);
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if (audioData) {
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audioStartTime = audioData->mTime;
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}
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}
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PRInt64 startTime = NS_MIN(videoStartTime, audioStartTime);
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if (startTime != INT64_MAX) {
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aOutStartTime = startTime;
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}
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return videoData;
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}
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template<class Data>
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Data* nsBuiltinDecoderReader::DecodeToFirstData(DecodeFn aDecodeFn,
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MediaQueue<Data>& aQueue)
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{
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bool eof = false;
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while (!eof && aQueue.GetSize() == 0) {
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{
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ReentrantMonitorAutoEnter decoderMon(mDecoder->GetReentrantMonitor());
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if (mDecoder->GetDecodeState() == nsDecoderStateMachine::DECODER_STATE_SHUTDOWN) {
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return nsnull;
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}
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}
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eof = !(this->*aDecodeFn)();
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}
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Data* d = nsnull;
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return (d = aQueue.PeekFront()) ? d : nsnull;
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}
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nsresult nsBuiltinDecoderReader::DecodeToTarget(PRInt64 aTarget)
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{
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// Decode forward to the target frame. Start with video, if we have it.
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if (HasVideo()) {
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bool eof = false;
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PRInt64 startTime = -1;
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nsAutoPtr<VideoData> video;
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while (HasVideo() && !eof) {
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while (mVideoQueue.GetSize() == 0 && !eof) {
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bool skip = false;
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eof = !DecodeVideoFrame(skip, 0);
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{
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ReentrantMonitorAutoEnter decoderMon(mDecoder->GetReentrantMonitor());
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if (mDecoder->GetDecodeState() == nsBuiltinDecoderStateMachine::DECODER_STATE_SHUTDOWN) {
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return NS_ERROR_FAILURE;
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}
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}
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}
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if (mVideoQueue.GetSize() == 0) {
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// Hit end of file, we want to display the last frame of the video.
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if (video) {
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mVideoQueue.PushFront(video.forget());
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}
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break;
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}
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video = mVideoQueue.PeekFront();
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// If the frame end time is less than the seek target, we won't want
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// to display this frame after the seek, so discard it.
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if (video && video->mEndTime <= aTarget) {
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if (startTime == -1) {
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startTime = video->mTime;
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}
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mVideoQueue.PopFront();
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} else {
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video.forget();
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break;
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}
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}
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{
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ReentrantMonitorAutoEnter decoderMon(mDecoder->GetReentrantMonitor());
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if (mDecoder->GetDecodeState() == nsBuiltinDecoderStateMachine::DECODER_STATE_SHUTDOWN) {
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return NS_ERROR_FAILURE;
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}
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}
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LOG(PR_LOG_DEBUG, ("First video frame after decode is %lld", startTime));
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}
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if (HasAudio()) {
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// Decode audio forward to the seek target.
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bool eof = false;
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while (HasAudio() && !eof) {
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while (!eof && mAudioQueue.GetSize() == 0) {
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eof = !DecodeAudioData();
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{
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ReentrantMonitorAutoEnter decoderMon(mDecoder->GetReentrantMonitor());
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if (mDecoder->GetDecodeState() == nsBuiltinDecoderStateMachine::DECODER_STATE_SHUTDOWN) {
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return NS_ERROR_FAILURE;
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}
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}
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}
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const AudioData* audio = mAudioQueue.PeekFront();
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if (!audio)
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break;
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CheckedInt64 startFrame = UsecsToFrames(audio->mTime, mInfo.mAudioRate);
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CheckedInt64 targetFrame = UsecsToFrames(aTarget, mInfo.mAudioRate);
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if (!startFrame.valid() || !targetFrame.valid()) {
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return NS_ERROR_FAILURE;
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}
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if (startFrame.value() + audio->mFrames <= targetFrame.value()) {
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// Our seek target lies after the frames in this AudioData. Pop it
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// off the queue, and keep decoding forwards.
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delete mAudioQueue.PopFront();
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audio = nsnull;
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continue;
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}
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if (startFrame.value() > targetFrame.value()) {
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// The seek target doesn't lie in the audio block just after the last
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// audio frames we've seen which were before the seek target. This
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// could have been the first audio data we've seen after seek, i.e. the
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// seek terminated after the seek target in the audio stream. Just
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// abort the audio decode-to-target, the state machine will play
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// silence to cover the gap. Typically this happens in poorly muxed
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// files.
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NS_WARNING("Audio not synced after seek, maybe a poorly muxed file?");
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break;
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}
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// The seek target lies somewhere in this AudioData's frames, strip off
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// any frames which lie before the seek target, so we'll begin playback
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// exactly at the seek target.
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NS_ASSERTION(targetFrame.value() >= startFrame.value(),
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"Target must at or be after data start.");
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NS_ASSERTION(targetFrame.value() < startFrame.value() + audio->mFrames,
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"Data must end after target.");
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PRInt64 framesToPrune = targetFrame.value() - startFrame.value();
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if (framesToPrune > audio->mFrames) {
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// We've messed up somehow. Don't try to trim frames, the |frames|
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// variable below will overflow.
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NS_WARNING("Can't prune more frames that we have!");
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break;
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}
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PRUint32 frames = audio->mFrames - static_cast<PRUint32>(framesToPrune);
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PRUint32 channels = audio->mChannels;
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nsAutoArrayPtr<AudioDataValue> audioData(new AudioDataValue[frames * channels]);
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memcpy(audioData.get(),
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audio->mAudioData.get() + (framesToPrune * channels),
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frames * channels * sizeof(AudioDataValue));
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CheckedInt64 duration = FramesToUsecs(frames, mInfo.mAudioRate);
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if (!duration.valid()) {
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return NS_ERROR_FAILURE;
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}
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nsAutoPtr<AudioData> data(new AudioData(audio->mOffset,
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aTarget,
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duration.value(),
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frames,
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audioData.forget(),
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channels));
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delete mAudioQueue.PopFront();
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mAudioQueue.PushFront(data.forget());
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break;
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}
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}
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return NS_OK;
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}
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