gecko-dev/content/media/nsMediaDecoder.cpp

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8.2 KiB
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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: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: ML 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla code.
*
* The Initial Developer of the Original Code is the Mozilla Corporation.
* Portions created by the Initial Developer are Copyright (C) 2007
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Chris Double <chris.double@double.co.nz>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsMediaDecoder.h"
#include "prlog.h"
#include "prmem.h"
#include "nsIFrame.h"
#include "nsIDocument.h"
#include "nsThreadUtils.h"
#include "nsIDOMHTMLMediaElement.h"
#include "nsNetUtil.h"
#include "nsHTMLMediaElement.h"
#include "nsIObserver.h"
#include "nsIObserverService.h"
#include "nsAutoLock.h"
#include "nsIRenderingContext.h"
#include "gfxContext.h"
#include "gfxImageSurface.h"
#include "nsPresContext.h"
#include "nsDOMError.h"
#if defined(XP_MACOSX)
#include "gfxQuartzImageSurface.h"
#endif
// Number of milliseconds between progress events as defined by spec
#define PROGRESS_MS 350
// Number of milliseconds of no data before a stall event is fired as defined by spec
#define STALL_MS 3000
nsMediaDecoder::nsMediaDecoder() :
mElement(0),
mRGBWidth(-1),
mRGBHeight(-1),
mProgressTime(),
mDataTime(),
mVideoUpdateLock(nsnull),
mFramerate(0.0),
mAspectRatio(1.0),
mSizeChanged(PR_FALSE),
mShuttingDown(PR_FALSE)
{
MOZ_COUNT_CTOR(nsMediaDecoder);
}
nsMediaDecoder::~nsMediaDecoder()
{
if (mVideoUpdateLock) {
PR_DestroyLock(mVideoUpdateLock);
mVideoUpdateLock = nsnull;
}
MOZ_COUNT_DTOR(nsMediaDecoder);
}
PRBool nsMediaDecoder::Init(nsHTMLMediaElement* aElement)
{
mElement = aElement;
mVideoUpdateLock = PR_NewLock();
return mVideoUpdateLock != nsnull;
}
void nsMediaDecoder::Shutdown()
{
StopProgress();
mElement = nsnull;
}
nsHTMLMediaElement* nsMediaDecoder::GetMediaElement()
{
return mElement;
}
static PRInt32 ConditionDimension(float aValue, PRInt32 aDefault)
{
// This will exclude NaNs and infinities
if (aValue >= 1.0 && aValue <= 10000.0)
return PRInt32(NS_round(aValue));
return aDefault;
}
void nsMediaDecoder::Invalidate()
{
if (!mElement)
return;
nsIFrame* frame = mElement->GetPrimaryFrame();
{
nsAutoLock lock(mVideoUpdateLock);
if (mSizeChanged) {
nsIntSize scaledSize(mRGBWidth, mRGBHeight);
// Apply the aspect ratio to produce the intrinsic size we report
// to the element.
if (mAspectRatio > 1.0) {
// Increase the intrinsic width
scaledSize.width =
ConditionDimension(mAspectRatio*scaledSize.width, scaledSize.width);
} else {
// Increase the intrinsic height
scaledSize.height =
ConditionDimension(scaledSize.height/mAspectRatio, scaledSize.height);
}
mElement->UpdateMediaSize(scaledSize);
mSizeChanged = PR_FALSE;
if (frame) {
nsPresContext* presContext = frame->PresContext();
nsIPresShell *presShell = presContext->PresShell();
presShell->FrameNeedsReflow(frame,
nsIPresShell::eStyleChange,
NS_FRAME_IS_DIRTY);
}
}
}
if (frame) {
nsRect r(nsPoint(0,0), frame->GetSize());
frame->Invalidate(r);
}
}
static void ProgressCallback(nsITimer* aTimer, void* aClosure)
{
nsMediaDecoder* decoder = static_cast<nsMediaDecoder*>(aClosure);
decoder->Progress(PR_TRUE);
}
void nsMediaDecoder::Progress(PRBool aTimer)
{
if (!mElement)
return;
TimeStamp now = TimeStamp::Now();
if (!aTimer) {
mDataTime = now;
}
// If PROGRESS_MS has passed since the last progress event fired and more
// data has arrived since then, fire another progress event.
if ((mProgressTime.IsNull() ||
now - mProgressTime >= TimeDuration::FromMilliseconds(PROGRESS_MS)) &&
!mDataTime.IsNull() &&
now - mDataTime <= TimeDuration::FromMilliseconds(PROGRESS_MS)) {
mElement->DispatchAsyncProgressEvent(NS_LITERAL_STRING("progress"));
mProgressTime = now;
}
if (!mDataTime.IsNull() &&
now - mDataTime >= TimeDuration::FromMilliseconds(STALL_MS)) {
mElement->DownloadStalled();
// Null it out
mDataTime = TimeStamp();
}
}
nsresult nsMediaDecoder::StartProgress()
{
if (mProgressTimer)
return NS_OK;
mProgressTimer = do_CreateInstance("@mozilla.org/timer;1");
return mProgressTimer->InitWithFuncCallback(ProgressCallback,
this,
PROGRESS_MS,
nsITimer::TYPE_REPEATING_SLACK);
}
nsresult nsMediaDecoder::StopProgress()
{
if (!mProgressTimer)
return NS_OK;
nsresult rv = mProgressTimer->Cancel();
mProgressTimer = nsnull;
return rv;
}
void nsMediaDecoder::SetRGBData(PRInt32 aWidth, PRInt32 aHeight, float aFramerate,
float aAspectRatio, unsigned char* aRGBBuffer)
{
nsAutoLock lock(mVideoUpdateLock);
if (mRGBWidth != aWidth || mRGBHeight != aHeight ||
mAspectRatio != aAspectRatio) {
mRGBWidth = aWidth;
mRGBHeight = aHeight;
mAspectRatio = aAspectRatio;
mSizeChanged = PR_TRUE;
}
mFramerate = aFramerate;
mRGB = aRGBBuffer;
}
void nsMediaDecoder::Paint(gfxContext* aContext,
gfxPattern::GraphicsFilter aFilter,
const gfxRect& aRect)
{
nsAutoLock lock(mVideoUpdateLock);
if (!mRGB)
return;
nsRefPtr<gfxImageSurface> imgSurface =
new gfxImageSurface(mRGB,
gfxIntSize(mRGBWidth, mRGBHeight),
mRGBWidth * 4,
gfxASurface::ImageFormatRGB24);
if (!imgSurface)
return;
nsRefPtr<gfxASurface> surface(imgSurface);
#if defined(XP_MACOSX)
nsRefPtr<gfxQuartzImageSurface> quartzSurface =
new gfxQuartzImageSurface(imgSurface);
if (!quartzSurface)
return;
surface = quartzSurface;
#endif
nsRefPtr<gfxPattern> pat = new gfxPattern(surface);
if (!pat)
return;
// Make the source image fill the rectangle completely
pat->SetMatrix(gfxMatrix().Scale(mRGBWidth/aRect.Width(), mRGBHeight/aRect.Height()));
pat->SetFilter(aFilter);
// Set PAD mode so that when the video is being scaled, we do not sample
// outside the bounds of the video image.
gfxPattern::GraphicsExtend extend = gfxPattern::EXTEND_PAD;
// PAD is slow with X11 and Quartz surfaces, so prefer speed over correctness
// and use NONE.
nsRefPtr<gfxASurface> target = aContext->CurrentSurface();
gfxASurface::gfxSurfaceType type = target->GetType();
if (type == gfxASurface::SurfaceTypeXlib ||
type == gfxASurface::SurfaceTypeXcb ||
type == gfxASurface::SurfaceTypeQuartz) {
extend = gfxPattern::EXTEND_NONE;
}
pat->SetExtend(extend);
/* Draw RGB surface onto frame */
aContext->NewPath();
aContext->PixelSnappedRectangleAndSetPattern(aRect, pat);
aContext->Fill();
}