gecko/content/media/raw/nsRawReader.cpp

310 lines
10 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 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
* Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Brad Lassey <blassey@mozilla.com>
* Kyle Huey <me@kylehuey.com>
*
* 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 "nsBuiltinDecoderStateMachine.h"
#include "nsBuiltinDecoder.h"
#include "nsRawReader.h"
#include "nsRawDecoder.h"
#include "VideoUtils.h"
nsRawReader::nsRawReader(nsBuiltinDecoder* aDecoder)
: nsBuiltinDecoderReader(aDecoder),
mCurrentFrame(0), mFrameSize(0)
{
MOZ_COUNT_CTOR(nsRawReader);
}
nsRawReader::~nsRawReader()
{
MOZ_COUNT_DTOR(nsRawReader);
}
nsresult nsRawReader::Init(nsBuiltinDecoderReader* aCloneDonor)
{
return NS_OK;
}
nsresult nsRawReader::ResetDecode()
{
mCurrentFrame = 0;
return nsBuiltinDecoderReader::ResetDecode();
}
nsresult nsRawReader::ReadMetadata(nsVideoInfo* aInfo)
{
NS_ASSERTION(mDecoder->OnDecodeThread(),
"Should be on decode thread.");
MediaResource* resource = mDecoder->GetResource();
NS_ASSERTION(resource, "Decoder has no media resource");
if (!ReadFromResource(resource, reinterpret_cast<PRUint8*>(&mMetadata),
sizeof(mMetadata)))
return NS_ERROR_FAILURE;
// Validate the header
if (!(mMetadata.headerPacketID == 0 /* Packet ID of 0 for the header*/ &&
mMetadata.codecID == RAW_ID /* "YUV" */ &&
mMetadata.majorVersion == 0 &&
mMetadata.minorVersion == 1))
return NS_ERROR_FAILURE;
CheckedUint32 dummy = CheckedUint32(static_cast<PRUint32>(mMetadata.frameWidth)) *
static_cast<PRUint32>(mMetadata.frameHeight);
NS_ENSURE_TRUE(dummy.valid(), NS_ERROR_FAILURE);
if (mMetadata.aspectDenominator == 0 ||
mMetadata.framerateDenominator == 0)
return NS_ERROR_FAILURE; // Invalid data
// Determine and verify frame display size.
float pixelAspectRatio = static_cast<float>(mMetadata.aspectNumerator) /
mMetadata.aspectDenominator;
nsIntSize display(mMetadata.frameWidth, mMetadata.frameHeight);
ScaleDisplayByAspectRatio(display, pixelAspectRatio);
mPicture = nsIntRect(0, 0, mMetadata.frameWidth, mMetadata.frameHeight);
nsIntSize frameSize(mMetadata.frameWidth, mMetadata.frameHeight);
if (!nsVideoInfo::ValidateVideoRegion(frameSize, mPicture, display)) {
// Video track's frame sizes will overflow. Fail.
return NS_ERROR_FAILURE;
}
mInfo.mHasVideo = true;
mInfo.mHasAudio = false;
mInfo.mDisplay = display;
mFrameRate = static_cast<float>(mMetadata.framerateNumerator) /
mMetadata.framerateDenominator;
// Make some sanity checks
if (mFrameRate > 45 ||
mFrameRate == 0 ||
pixelAspectRatio == 0 ||
mMetadata.frameWidth > 2000 ||
mMetadata.frameHeight > 2000 ||
mMetadata.chromaChannelBpp != 4 ||
mMetadata.lumaChannelBpp != 8 ||
mMetadata.colorspace != 1 /* 4:2:0 */)
return NS_ERROR_FAILURE;
mFrameSize = mMetadata.frameWidth * mMetadata.frameHeight *
(mMetadata.lumaChannelBpp + mMetadata.chromaChannelBpp) / 8.0 +
sizeof(nsRawPacketHeader);
PRInt64 length = resource->GetLength();
if (length != -1) {
mozilla::ReentrantMonitorAutoEnter autoMonitor(mDecoder->GetReentrantMonitor());
mDecoder->GetStateMachine()->SetDuration(USECS_PER_S *
(length - sizeof(nsRawVideoHeader)) /
(mFrameSize * mFrameRate));
}
*aInfo = mInfo;
return NS_OK;
}
bool nsRawReader::DecodeAudioData()
{
NS_ASSERTION(mDecoder->OnStateMachineThread() || mDecoder->OnDecodeThread(),
"Should be on state machine thread or decode thread.");
return false;
}
// Helper method that either reads until it gets aLength bytes
// or returns false
bool nsRawReader::ReadFromResource(MediaResource *aResource, PRUint8* aBuf,
PRUint32 aLength)
{
while (aLength > 0) {
PRUint32 bytesRead = 0;
nsresult rv;
rv = aResource->Read(reinterpret_cast<char*>(aBuf), aLength, &bytesRead);
NS_ENSURE_SUCCESS(rv, false);
if (bytesRead == 0) {
return false;
}
aLength -= bytesRead;
aBuf += bytesRead;
}
return true;
}
bool nsRawReader::DecodeVideoFrame(bool &aKeyframeSkip,
PRInt64 aTimeThreshold)
{
NS_ASSERTION(mDecoder->OnDecodeThread(),
"Should be on decode thread.");
// Record number of frames decoded and parsed. Automatically update the
// stats counters using the AutoNotifyDecoded stack-based class.
PRUint32 parsed = 0, decoded = 0;
nsMediaDecoder::AutoNotifyDecoded autoNotify(mDecoder, parsed, decoded);
if (!mFrameSize)
return false; // Metadata read failed. We should refuse to play.
PRInt64 currentFrameTime = USECS_PER_S * mCurrentFrame / mFrameRate;
PRUint32 length = mFrameSize - sizeof(nsRawPacketHeader);
nsAutoArrayPtr<PRUint8> buffer(new PRUint8[length]);
MediaResource* resource = mDecoder->GetResource();
NS_ASSERTION(resource, "Decoder has no media resource");
// We're always decoding one frame when called
while(true) {
nsRawPacketHeader header;
// Read in a packet header and validate
if (!(ReadFromResource(resource, reinterpret_cast<PRUint8*>(&header),
sizeof(header))) ||
!(header.packetID == 0xFF && header.codecID == RAW_ID /* "YUV" */)) {
return false;
}
if (!ReadFromResource(resource, buffer, length)) {
return false;
}
parsed++;
if (currentFrameTime >= aTimeThreshold)
break;
mCurrentFrame++;
currentFrameTime += static_cast<double>(USECS_PER_S) / mFrameRate;
}
VideoData::YCbCrBuffer b;
b.mPlanes[0].mData = buffer;
b.mPlanes[0].mStride = mMetadata.frameWidth * mMetadata.lumaChannelBpp / 8.0;
b.mPlanes[0].mHeight = mMetadata.frameHeight;
b.mPlanes[0].mWidth = mMetadata.frameWidth;
PRUint32 cbcrStride = mMetadata.frameWidth * mMetadata.chromaChannelBpp / 8.0;
b.mPlanes[1].mData = buffer + mMetadata.frameHeight * b.mPlanes[0].mStride;
b.mPlanes[1].mStride = cbcrStride;
b.mPlanes[1].mHeight = mMetadata.frameHeight / 2;
b.mPlanes[1].mWidth = mMetadata.frameWidth / 2;
b.mPlanes[2].mData = b.mPlanes[1].mData + mMetadata.frameHeight * cbcrStride / 2;
b.mPlanes[2].mStride = cbcrStride;
b.mPlanes[2].mHeight = mMetadata.frameHeight / 2;
b.mPlanes[2].mWidth = mMetadata.frameWidth / 2;
VideoData *v = VideoData::Create(mInfo,
mDecoder->GetImageContainer(),
-1,
currentFrameTime,
currentFrameTime + (USECS_PER_S / mFrameRate),
b,
1, // In raw video every frame is a keyframe
-1,
mPicture);
if (!v)
return false;
mVideoQueue.Push(v);
mCurrentFrame++;
decoded++;
currentFrameTime += USECS_PER_S / mFrameRate;
return true;
}
nsresult nsRawReader::Seek(PRInt64 aTime, PRInt64 aStartTime, PRInt64 aEndTime, PRInt64 aCurrentTime)
{
NS_ASSERTION(mDecoder->OnDecodeThread(),
"Should be on decode thread.");
MediaResource *resource = mDecoder->GetResource();
NS_ASSERTION(resource, "Decoder has no media resource");
PRUint32 frame = mCurrentFrame;
if (aTime >= UINT_MAX)
return NS_ERROR_FAILURE;
mCurrentFrame = aTime * mFrameRate / USECS_PER_S;
CheckedUint32 offset = CheckedUint32(mCurrentFrame) * mFrameSize;
offset += sizeof(nsRawVideoHeader);
NS_ENSURE_TRUE(offset.valid(), NS_ERROR_FAILURE);
nsresult rv = resource->Seek(nsISeekableStream::NS_SEEK_SET, offset.value());
NS_ENSURE_SUCCESS(rv, rv);
mVideoQueue.Erase();
while(mVideoQueue.GetSize() == 0) {
bool keyframeSkip = false;
if (!DecodeVideoFrame(keyframeSkip, 0)) {
mCurrentFrame = frame;
return NS_ERROR_FAILURE;
}
{
mozilla::ReentrantMonitorAutoEnter autoMonitor(mDecoder->GetReentrantMonitor());
if (mDecoder->GetDecodeState() ==
nsBuiltinDecoderStateMachine::DECODER_STATE_SHUTDOWN) {
mCurrentFrame = frame;
return NS_ERROR_FAILURE;
}
}
nsAutoPtr<VideoData> video(mVideoQueue.PeekFront());
if (video && video->mEndTime < aTime) {
mVideoQueue.PopFront();
video = nsnull;
} else {
video.forget();
}
}
return NS_OK;
}
nsresult nsRawReader::GetBuffered(nsTimeRanges* aBuffered, PRInt64 aStartTime)
{
return NS_OK;
}