static TexParams clamped_mipmapped() { return clamped(TexFilter::Mipmapped); }
static TexParams clamped_nearest() { return clamped(TexFilter::Nearest); }
static TexParams clamped_linear() { return clamped(TexFilter::Linear); }
void SetScreenBrightness(double brightness)
{
AssertMainThread();
PROXY_IF_SANDBOXED(SetScreenBrightness(clamped(brightness, 0.0, 1.0)));
}
double
ComputedTimingFunction::GetValue(
double aPortion,
ComputedTimingFunction::BeforeFlag aBeforeFlag) const
{
if (HasSpline()) {
// Check for a linear curve.
// (GetSplineValue(), below, also checks this but doesn't work when
// aPortion is outside the range [0.0, 1.0]).
if (mTimingFunction.X1() == mTimingFunction.Y1() &&
mTimingFunction.X2() == mTimingFunction.Y2()) {
return aPortion;
}
// Ensure that we return 0 or 1 on both edges.
if (aPortion == 0.0) {
return 0.0;
}
if (aPortion == 1.0) {
return 1.0;
}
// For negative values, try to extrapolate with tangent (p1 - p0) or,
// if p1 is coincident with p0, with (p2 - p0).
if (aPortion < 0.0) {
if (mTimingFunction.X1() > 0.0) {
return aPortion * mTimingFunction.Y1() / mTimingFunction.X1();
} else if (mTimingFunction.Y1() == 0 && mTimingFunction.X2() > 0.0) {
return aPortion * mTimingFunction.Y2() / mTimingFunction.X2();
}
// If we can't calculate a sensible tangent, don't extrapolate at all.
return 0.0;
}
// For values greater than 1, try to extrapolate with tangent (p2 - p3) or,
// if p2 is coincident with p3, with (p1 - p3).
if (aPortion > 1.0) {
if (mTimingFunction.X2() < 1.0) {
return 1.0 + (aPortion - 1.0) *
(mTimingFunction.Y2() - 1) / (mTimingFunction.X2() - 1);
} else if (mTimingFunction.Y2() == 1 && mTimingFunction.X1() < 1.0) {
return 1.0 + (aPortion - 1.0) *
(mTimingFunction.Y1() - 1) / (mTimingFunction.X1() - 1);
}
// If we can't calculate a sensible tangent, don't extrapolate at all.
return 1.0;
}
return mTimingFunction.GetSplineValue(aPortion);
}
// Since we use endpoint-exclusive timing, the output of a steps(start) timing
// function when aPortion = 0.0 is the top of the first step. When aPortion is
// negative, however, we should use the bottom of the first step. We handle
// negative values of aPortion specially here since once we clamp aPortion
// to [0,1] below we will no longer be able to distinguish to the two cases.
if (aPortion < 0.0) {
return 0.0;
}
// Clamp in case of steps(end) and steps(start) for values greater than 1.
aPortion = clamped(aPortion, 0.0, 1.0);
return StepTiming(mSteps, aPortion, aBeforeFlag, mType);
}
nsresult
RtspMediaResource::OnConnected(uint8_t aTrackIdx,
nsIStreamingProtocolMetaData *meta)
{
if (mIsConnected) {
for (uint32_t i = 0 ; i < mTrackBuffer.Length(); ++i) {
mTrackBuffer[i]->Start();
}
return NS_OK;
}
uint8_t tracks;
mMediaStreamController->GetTotalTracks(&tracks);
uint64_t duration = 0;
for (int i = 0; i < tracks; ++i) {
nsCString rtspTrackId("RtspTrack");
rtspTrackId.AppendInt(i);
nsCOMPtr<nsIStreamingProtocolMetaData> trackMeta;
mMediaStreamController->GetTrackMetaData(i, getter_AddRefs(trackMeta));
MOZ_ASSERT(trackMeta);
trackMeta->GetDuration(&duration);
// Here is a heuristic to estimate the slot size.
// For video track, calculate the width*height.
// For audio track, use the BUFFER_SLOT_DEFAULT_SIZE because the w*h is 0.
// Finally clamp them into (BUFFER_SLOT_DEFAULT_SIZE,BUFFER_SLOT_MAX_SIZE)
uint32_t w, h;
uint32_t slotSize;
trackMeta->GetWidth(&w);
trackMeta->GetHeight(&h);
slotSize = clamped((int32_t)(w * h), BUFFER_SLOT_DEFAULT_SIZE,
BUFFER_SLOT_MAX_SIZE);
mTrackBuffer.AppendElement(new RtspTrackBuffer(rtspTrackId.get(),
i, slotSize));
mTrackBuffer[i]->Start();
}
if (!mDecoder) {
return NS_ERROR_FAILURE;
}
// If the duration is 0, imply the stream is live stream.
if (duration) {
// Not live stream.
mRealTime = false;
bool seekable = true;
mDecoder->SetInfinite(false);
mDecoder->SetTransportSeekable(seekable);
mDecoder->SetDuration(duration);
} else {
// Live stream.
// Check the preference "media.realtime_decoder.enabled".
if (!Preferences::GetBool("media.realtime_decoder.enabled", false)) {
// Give up, report error to media element.
nsCOMPtr<nsIRunnable> event =
NS_NewRunnableMethod(mDecoder, &MediaDecoder::DecodeError);
NS_DispatchToMainThread(event, NS_DISPATCH_NORMAL);
return NS_ERROR_FAILURE;
} else {
mRealTime = true;
bool seekable = false;
mDecoder->SetInfinite(true);
mDecoder->SetTransportSeekable(seekable);
mDecoder->SetMediaSeekable(seekable);
}
}
// Fires an initial progress event and sets up the stall counter so stall events
// fire if no download occurs within the required time frame.
mDecoder->Progress(false);
MediaDecoderOwner* owner = mDecoder->GetMediaOwner();
NS_ENSURE_TRUE(owner, NS_ERROR_FAILURE);
dom::HTMLMediaElement* element = owner->GetMediaElement();
NS_ENSURE_TRUE(element, NS_ERROR_FAILURE);
element->FinishDecoderSetup(mDecoder, this);
mIsConnected = true;
return NS_OK;
}
double
ComputedTimingFunction::GetValue(double aPortion) const
{
if (HasSpline()) {
// Check for a linear curve.
// (GetSplineValue(), below, also checks this but doesn't work when
// aPortion is outside the range [0.0, 1.0]).
if (mTimingFunction.X1() == mTimingFunction.Y1() &&
mTimingFunction.X2() == mTimingFunction.Y2()) {
return aPortion;
}
// For negative values, try to extrapolate with tangent (p1 - p0) or,
// if p1 is coincident with p0, with (p2 - p0).
if (aPortion < 0.0) {
if (mTimingFunction.X1() > 0.0) {
return aPortion * mTimingFunction.Y1() / mTimingFunction.X1();
} else if (mTimingFunction.Y1() == 0 && mTimingFunction.X2() > 0.0) {
return aPortion * mTimingFunction.Y2() / mTimingFunction.X2();
}
// If we can't calculate a sensible tangent, don't extrapolate at all.
return 0.0;
}
// For values greater than 1, try to extrapolate with tangent (p2 - p3) or,
// if p2 is coincident with p3, with (p1 - p3).
if (aPortion > 1.0) {
if (mTimingFunction.X2() < 1.0) {
return 1.0 + (aPortion - 1.0) *
(mTimingFunction.Y2() - 1) / (mTimingFunction.X2() - 1);
} else if (mTimingFunction.Y2() == 1 && mTimingFunction.X1() < 1.0) {
return 1.0 + (aPortion - 1.0) *
(mTimingFunction.Y1() - 1) / (mTimingFunction.X1() - 1);
}
// If we can't calculate a sensible tangent, don't extrapolate at all.
return 1.0;
}
return mTimingFunction.GetSplineValue(aPortion);
}
// Since we use endpoint-exclusive timing, the output of a steps(start) timing
// function when aPortion = 0.0 is the top of the first step. When aPortion is
// negative, however, we should use the bottom of the first step. We handle
// negative values of aPortion specially here since once we clamp aPortion
// to [0,1] below we will no longer be able to distinguish to the two cases.
if (aPortion < 0.0) {
return 0.0;
}
// Clamp in case of steps(end) and steps(start) for values greater than 1.
aPortion = clamped(aPortion, 0.0, 1.0);
if (mType == nsTimingFunction::Type::StepStart) {
// There are diagrams in the spec that seem to suggest this check
// and the bounds point should not be symmetric with StepEnd, but
// should actually step up at rather than immediately after the
// fraction points. However, we rely on rounding negative values
// up to zero, so we can't do that. And it's not clear the spec
// really meant it.
return 1.0 - StepEnd(mSteps, 1.0 - aPortion);
}
MOZ_ASSERT(mType == nsTimingFunction::Type::StepEnd, "bad type");
return StepEnd(mSteps, aPortion);
}
Mat clamped(const Mat &m)
{
return(clamped(m, 1e-7));
}
