gecko/content/media/MediaEngineDefault.cpp

289 lines
6.4 KiB
C++

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "MediaEngineDefault.h"
#define WIDTH 320
#define HEIGHT 240
#define FPS 10
#define CHANNELS 1
#define RATE USECS_PER_S
namespace mozilla {
NS_IMPL_THREADSAFE_ISUPPORTS1(MediaEngineDefaultVideoSource, nsITimerCallback)
/**
* Default video source.
*/
void
MediaEngineDefaultVideoSource::GetName(nsAString& aName)
{
aName.Assign(NS_LITERAL_STRING("Default Video Device"));
return;
}
void
MediaEngineDefaultVideoSource::GetUUID(nsAString& aUUID)
{
aUUID.Assign(NS_LITERAL_STRING("1041FCBD-3F12-4F7B-9E9B-1EC556DD5676"));
return;
}
already_AddRefed<nsDOMMediaStream>
MediaEngineDefaultVideoSource::Allocate()
{
if (mState != kReleased) {
return NULL;
}
mState = kAllocated;
return nsDOMMediaStream::CreateInputStream();
}
nsresult
MediaEngineDefaultVideoSource::Deallocate()
{
if (mState != kStopped && mState != kAllocated) {
return NS_ERROR_FAILURE;
}
mState = kReleased;
return NS_OK;
}
MediaEngineVideoOptions
MediaEngineDefaultVideoSource::GetOptions()
{
MediaEngineVideoOptions aOpts;
aOpts.mWidth = WIDTH;
aOpts.mHeight = HEIGHT;
aOpts.mMaxFPS = FPS;
aOpts.codecType = kVideoCodecI420;
return aOpts;
}
nsresult
MediaEngineDefaultVideoSource::Start(SourceMediaStream* aStream, TrackID aID)
{
if (mState != kAllocated) {
return NS_ERROR_FAILURE;
}
mTimer = do_CreateInstance(NS_TIMER_CONTRACTID);
if (!mTimer) {
return NS_ERROR_FAILURE;
}
mSource = aStream;
// Allocate a single blank Image
layers::Image::Format format = layers::Image::PLANAR_YCBCR;
mImageContainer = layers::LayerManager::CreateImageContainer();
nsRefPtr<layers::Image> image = mImageContainer->CreateImage(&format, 1);
int len = ((WIDTH * HEIGHT) * 3 / 2);
mImage = static_cast<layers::PlanarYCbCrImage*>(image.get());
PRUint8* frame = (PRUint8*) PR_Malloc(len);
memset(frame, 0x80, len); // Gray
const PRUint8 lumaBpp = 8;
const PRUint8 chromaBpp = 4;
layers::PlanarYCbCrImage::Data data;
data.mYChannel = frame;
data.mYSize = gfxIntSize(WIDTH, HEIGHT);
data.mYStride = WIDTH * lumaBpp / 8.0;
data.mCbCrStride = WIDTH * chromaBpp / 8.0;
data.mCbChannel = frame + HEIGHT * data.mYStride;
data.mCrChannel = data.mCbChannel + HEIGHT * data.mCbCrStride / 2;
data.mCbCrSize = gfxIntSize(WIDTH / 2, HEIGHT / 2);
data.mPicX = 0;
data.mPicY = 0;
data.mPicSize = gfxIntSize(WIDTH, HEIGHT);
data.mStereoMode = layers::STEREO_MODE_MONO;
// SetData copies data, so we can free the frame
mImage->SetData(data);
PR_Free(frame);
// AddTrack takes ownership of segment
VideoSegment *segment = new VideoSegment();
segment->AppendFrame(image.forget(), USECS_PER_S / FPS, gfxIntSize(WIDTH, HEIGHT));
mSource->AddTrack(aID, RATE, 0, segment);
// We aren't going to add any more tracks
mSource->AdvanceKnownTracksTime(STREAM_TIME_MAX);
// Remember TrackID so we can end it later
mTrackID = aID;
// Start timer for subsequent frames
mTimer->InitWithCallback(this, 1000 / FPS, nsITimer::TYPE_REPEATING_SLACK);
mState = kStarted;
return NS_OK;
}
nsresult
MediaEngineDefaultVideoSource::Stop()
{
if (mState != kStarted) {
return NS_ERROR_FAILURE;
}
if (!mTimer) {
return NS_ERROR_FAILURE;
}
mTimer->Cancel();
mTimer = NULL;
mSource->EndTrack(mTrackID);
mSource->Finish();
mState = kStopped;
return NS_OK;
}
nsresult
MediaEngineDefaultVideoSource::Snapshot(PRUint32 aDuration, nsIDOMFile** aFile)
{
*aFile = nsnull;
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
MediaEngineDefaultVideoSource::Notify(nsITimer* aTimer)
{
VideoSegment segment;
nsRefPtr<layers::PlanarYCbCrImage> image = mImage;
segment.AppendFrame(image.forget(), USECS_PER_S / FPS, gfxIntSize(WIDTH, HEIGHT));
mSource->AppendToTrack(mTrackID, &segment);
return NS_OK;
}
NS_IMPL_THREADSAFE_ISUPPORTS1(MediaEngineDefaultAudioSource, nsITimerCallback)
/**
* Default audio source.
*/
void
MediaEngineDefaultAudioSource::GetName(nsAString& aName)
{
aName.Assign(NS_LITERAL_STRING("Default Audio Device"));
return;
}
void
MediaEngineDefaultAudioSource::GetUUID(nsAString& aUUID)
{
aUUID.Assign(NS_LITERAL_STRING("B7CBD7C1-53EF-42F9-8353-73F61C70C092"));
return;
}
already_AddRefed<nsDOMMediaStream>
MediaEngineDefaultAudioSource::Allocate()
{
if (mState != kReleased) {
return NULL;
}
mState = kAllocated;
return nsDOMMediaStream::CreateInputStream();
}
nsresult
MediaEngineDefaultAudioSource::Deallocate()
{
if (mState != kStopped && mState != kAllocated) {
return NS_ERROR_FAILURE;
}
mState = kReleased;
return NS_OK;
}
nsresult
MediaEngineDefaultAudioSource::Start(SourceMediaStream* aStream, TrackID aID)
{
if (mState != kAllocated) {
return NULL;
}
mTimer = do_CreateInstance(NS_TIMER_CONTRACTID);
if (!mTimer) {
return NULL;
}
mSource = aStream;
// AddTrack will take ownership of segment
AudioSegment* segment = new AudioSegment();
segment->Init(CHANNELS);
mSource->AddTrack(aID, RATE, 0, segment);
// We aren't going to add any more tracks
mSource->AdvanceKnownTracksTime(STREAM_TIME_MAX);
// Remember TrackID so we can finish later
mTrackID = aID;
// 1 Audio frame per Video frame
mTimer->InitWithCallback(this, 1000 / FPS, nsITimer::TYPE_REPEATING_SLACK);
mState = kStarted;
return NS_OK;
}
nsresult
MediaEngineDefaultAudioSource::Stop()
{
if (mState != kStarted) {
return NS_ERROR_FAILURE;
}
if (!mTimer) {
return NS_ERROR_FAILURE;
}
mTimer->Cancel();
mTimer = NULL;
mSource->EndTrack(mTrackID);
mSource->Finish();
mState = kStopped;
return NS_OK;
}
nsresult
MediaEngineDefaultAudioSource::Snapshot(PRUint32 aDuration, nsIDOMFile** aFile)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
MediaEngineDefaultAudioSource::Notify(nsITimer* aTimer)
{
AudioSegment segment;
segment.Init(CHANNELS);
segment.InsertNullDataAtStart(1);
mSource->AppendToTrack(mTrackID, &segment);
return NS_OK;
}
void
MediaEngineDefault::EnumerateVideoDevices(nsTArray<nsRefPtr<MediaEngineVideoSource> >* aVSources) {
aVSources->AppendElement(mVSource);
return;
}
void
MediaEngineDefault::EnumerateAudioDevices(nsTArray<nsRefPtr<MediaEngineAudioSource> >* aASources) {
aASources->AppendElement(mASource);
return;
}
} // namespace mozilla