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gecko-dev/dom/media/RtspMediaResource.cpp

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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: */
/* 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 "mozilla/DebugOnly.h"
#include "RtspMediaResource.h"
#include "MediaDecoder.h"
#include "mozilla/dom/HTMLMediaElement.h"
#include "mozilla/Monitor.h"
#include "mozilla/Preferences.h"
#include "mozilla/UniquePtr.h"
#include "nsContentUtils.h"
#include "nsIScriptSecurityManager.h"
#include "nsIStreamingProtocolService.h"
#include "nsServiceManagerUtils.h"
#ifdef NECKO_PROTOCOL_rtsp
#include "mozilla/net/RtspChannelChild.h"
#endif
using namespace mozilla::net;
using namespace mozilla::media;
mozilla::LazyLogModule gRtspMediaResourceLog("RtspMediaResource");
#define RTSP_LOG(msg, ...) MOZ_LOG(gRtspMediaResourceLog, mozilla::LogLevel::Debug, \
(msg, ##__VA_ARGS__))
// Debug logging macro with object pointer and class name.
#define RTSPMLOG(msg, ...) \
RTSP_LOG("%p [RtspMediaResource]: " msg, this, ##__VA_ARGS__)
namespace mozilla {
/* class RtspTrackBuffer: a ring buffer implementation for audio/video track
* un-decoded data.
* The ring buffer is divided into BUFFER_SLOT_NUM slots,
* and each slot's size is fixed(mSlotSize).
* Even though the ring buffer is divided into fixed size slots, it still can
* store the data which size is larger than one slot size.
* */
#define BUFFER_SLOT_NUM 8192
#define BUFFER_SLOT_DEFAULT_SIZE 256
#define BUFFER_SLOT_MAX_SIZE 512
#define BUFFER_SLOT_INVALID -1
#define BUFFER_SLOT_EMPTY 0
struct BufferSlotData {
int32_t mLength;
uint64_t mTime;
int32_t mFrameType;
};
// This constant is used to determine if the buffer usage is over a threshold.
const float kBufferThresholdPerc = 0.8f;
// The default value of playout delay duration.
const uint32_t kPlayoutDelayMs = 3000;
//-----------------------------------------------------------------------------
// RtspTrackBuffer
//-----------------------------------------------------------------------------
class RtspTrackBuffer
{
public:
RtspTrackBuffer(const char *aMonitor, int32_t aTrackIdx, uint32_t aSlotSize)
: mMonitor(aMonitor)
, mSlotSize(aSlotSize)
, mTotalBufferSize(BUFFER_SLOT_NUM * mSlotSize)
, mFrameType(0)
, mIsStarted(false)
, mDuringPlayoutDelay(false)
, mPlayoutDelayMs(kPlayoutDelayMs)
, mPlayoutDelayTimer(nullptr) {
MOZ_COUNT_CTOR(RtspTrackBuffer);
mTrackIdx = aTrackIdx;
MOZ_ASSERT(mSlotSize < UINT32_MAX / BUFFER_SLOT_NUM);
mRingBuffer = MakeUnique<uint8_t[]>(mTotalBufferSize);
Reset();
};
~RtspTrackBuffer() {
MOZ_COUNT_DTOR(RtspTrackBuffer);
mRingBuffer = nullptr;
};
size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
// including this
size_t size = aMallocSizeOf(this);
// excluding this
size += aMallocSizeOf(mRingBuffer.get());
return size;
}
void Start() {
MonitorAutoLock monitor(mMonitor);
mIsStarted = true;
mFrameType = 0;
}
void Stop() {
MonitorAutoLock monitor(mMonitor);
mIsStarted = false;
StopPlayoutDelay();
}
// Read the data from mRingBuffer[mConsumerIdx*mSlotSize] into aToBuffer.
// If the aToBufferSize is smaller than mBufferSlotDataLength[mConsumerIdx],
// early return and set the aFrameSize to notify the reader the aToBuffer
// doesn't have enough space. The reader must realloc the aToBuffer if it
// wishes to read the data.
nsresult ReadBuffer(uint8_t* aToBuffer, uint32_t aToBufferSize,
uint32_t& aReadCount, uint64_t& aFrameTime,
uint32_t& aFrameSize);
// Write the data from aFromBuffer into mRingBuffer[mProducerIdx*mSlotSize].
void WriteBuffer(const char *aFromBuffer, uint32_t aWriteCount,
uint64_t aFrameTime, uint32_t aFrameType);
// Reset the mProducerIdx, mConsumerIdx, mBufferSlotDataLength[],
// mBufferSlotDataTime[].
void Reset();
// We should call SetFrameType first then reset().
// If we call reset() first, the queue may still has some "garbage" frame
// from another thread's |OnMediaDataAvailable| before |SetFrameType|.
void ResetWithFrameType(uint32_t aFrameType) {
SetFrameType(aFrameType);
Reset();
}
// When RtspTrackBuffer is in playout delay duration, it should suspend
// reading data from the buffer until the playout-delay-ended event occurs,
// which wil be trigger by mPlayoutDelayTimer.
void StartPlayoutDelay() {
mDuringPlayoutDelay = true;
}
void LockStartPlayoutDelay() {
MonitorAutoLock monitor(mMonitor);
StartPlayoutDelay();
}
// If the playout delay is stopped, mPlayoutDelayTimer should be canceled.
void StopPlayoutDelay() {
if (mPlayoutDelayTimer) {
mPlayoutDelayTimer->Cancel();
mPlayoutDelayTimer = nullptr;
}
mDuringPlayoutDelay = false;
}
void LockStopPlayoutDelay() {
MonitorAutoLock monitor(mMonitor);
StopPlayoutDelay();
}
bool IsBufferOverThreshold();
void CreatePlayoutDelayTimer(unsigned long delayMs);
static void PlayoutDelayTimerCallback(nsITimer *aTimer, void *aClosure);
private:
// The FrameType is sync to nsIStreamingProtocolController.h
void SetFrameType(uint32_t aFrameType) {
MonitorAutoLock monitor(mMonitor);
mFrameType = mFrameType | aFrameType;
}
// A monitor lock to prevent racing condition.
Monitor mMonitor;
// Indicate the track number for Rtsp.
int32_t mTrackIdx;
// mProducerIdx: A slot index that we store data from
// nsIStreamingProtocolController.
// mConsumerIdx: A slot index that we read when decoder need(from OMX decoder).
int32_t mProducerIdx;
int32_t mConsumerIdx;
// Because each slot's size is fixed, we need an array to record the real
// data length and data time stamp.
// The value in mBufferSlotData[index].mLength represents:
// -1(BUFFER_SLOT_INVALID): The index of slot data is invalid, mConsumerIdx
// should go forward.
// 0(BUFFER_SLOT_EMPTY): The index slot is empty. mConsumerIdx should wait here.
// positive value: The index slot contains valid data and the value is data size.
BufferSlotData mBufferSlotData[BUFFER_SLOT_NUM];
// The ring buffer pointer.
UniquePtr<uint8_t[]> mRingBuffer;
// Each slot's size.
uint32_t mSlotSize;
// Total mRingBuffer's total size.
uint32_t mTotalBufferSize;
// A flag that that indicate the incoming data should be dropped or stored.
// When we are seeking, the incoming data should be dropped.
// Bit definition in |nsIStreamingProtocolController.h|
uint32_t mFrameType;
// Set true/false when |Start()/Stop()| is called.
bool mIsStarted;
// Indicate the buffer is in playout delay duration or not.
bool mDuringPlayoutDelay;
// Playout delay duration defined in milliseconds.
uint32_t mPlayoutDelayMs;
// Timer used to fire playout-delay-ended event.
nsCOMPtr<nsITimer> mPlayoutDelayTimer;
};
nsresult RtspTrackBuffer::ReadBuffer(uint8_t* aToBuffer, uint32_t aToBufferSize,
uint32_t& aReadCount, uint64_t& aFrameTime,
uint32_t& aFrameSize)
{
MonitorAutoLock monitor(mMonitor);
RTSPMLOG("ReadBuffer mTrackIdx %d mProducerIdx %d mConsumerIdx %d "
"mBufferSlotData[mConsumerIdx].mLength %d"
,mTrackIdx ,mProducerIdx ,mConsumerIdx
,mBufferSlotData[mConsumerIdx].mLength);
// Reader should skip the slots with mLength==BUFFER_SLOT_INVALID.
// The loop ends when
// 1. Read data successfully
// 2. Fail to read data due to aToBuffer's space
// 3. No data in this buffer
// 4. mIsStarted is not set
while (1) {
// Make sure the track buffer is started.
// It could be stopped when RTSP connection is disconnected.
if (!mIsStarted) {
RTSPMLOG("ReadBuffer: mIsStarted is false");
return NS_ERROR_FAILURE;
}
// Do not read from buffer if we are still in the playout delay duration.
if (mDuringPlayoutDelay) {
monitor.Wait();
continue;
}
if (mBufferSlotData[mConsumerIdx].mFrameType & MEDIASTREAM_FRAMETYPE_END_OF_STREAM) {
return NS_BASE_STREAM_CLOSED;
}
if (mBufferSlotData[mConsumerIdx].mLength > 0) {
// Check the aToBuffer space is enough for data copy.
if ((int32_t)aToBufferSize < mBufferSlotData[mConsumerIdx].mLength) {
aFrameSize = mBufferSlotData[mConsumerIdx].mLength;
break;
}
uint32_t slots = mBufferSlotData[mConsumerIdx].mLength / mSlotSize;
if (mBufferSlotData[mConsumerIdx].mLength % mSlotSize > 0) {
slots++;
}
// we have data, copy to aToBuffer
MOZ_ASSERT(mBufferSlotData[mConsumerIdx].mLength <=
(int32_t)((BUFFER_SLOT_NUM - mConsumerIdx) * mSlotSize));
memcpy(aToBuffer,
(void *)(&mRingBuffer[mSlotSize * mConsumerIdx]),
mBufferSlotData[mConsumerIdx].mLength);
aFrameSize = aReadCount = mBufferSlotData[mConsumerIdx].mLength;
aFrameTime = mBufferSlotData[mConsumerIdx].mTime;
RTSPMLOG("DataLength %d, data time %lld"
,mBufferSlotData[mConsumerIdx].mLength
,mBufferSlotData[mConsumerIdx].mTime);
// After reading the data, we set current index of mBufferSlotDataLength
// to BUFFER_SLOT_EMPTY to indicate these slots are free.
for (uint32_t i = mConsumerIdx; i < mConsumerIdx + slots; ++i) {
mBufferSlotData[i].mLength = BUFFER_SLOT_EMPTY;
mBufferSlotData[i].mTime = BUFFER_SLOT_EMPTY;
}
mConsumerIdx = (mConsumerIdx + slots) % BUFFER_SLOT_NUM;
break;
} else if (mBufferSlotData[mConsumerIdx].mLength == BUFFER_SLOT_INVALID) {
mConsumerIdx = (mConsumerIdx + 1) % BUFFER_SLOT_NUM;
RTSPMLOG("BUFFER_SLOT_INVALID move forward");
} else {
// No data, the decode thread is blocked here until we receive
// OnMediaDataAvailable. The OnMediaDataAvailable will call WriteBuffer()
// to wake up the decode thread.
RTSPMLOG("monitor.Wait()");
monitor.Wait();
}
}
return NS_OK;
}
/* When we perform a WriteBuffer, we check mIsStarted and aFrameType first.
* These flags prevent "garbage" frames from being written into the buffer.
*
* After writing the data into the buffer, we check to see if we wrote over a
* slot, and update mConsumerIdx if necessary.
* This ensures that the decoder will get the "oldest" data available in the
* buffer.
*
* If the incoming data is larger than one slot size (isMultipleSlots), we do
* |mBufferSlotData[].mLength = BUFFER_SLOT_INVALID;| for other slots except the
* first slot, in order to notify the reader that some slots are unavailable.
*
* If the incoming data is isMultipleSlots and crosses the end of
* BUFFER_SLOT_NUM, returnToHead is set to true and the data will continue to
* be written from head(index 0).
*
* MEDIASTREAM_FRAMETYPE_DISCONTINUITY currently is used when we are seeking.
* */
void RtspTrackBuffer::WriteBuffer(const char *aFromBuffer, uint32_t aWriteCount,
uint64_t aFrameTime, uint32_t aFrameType)
{
MonitorAutoLock monitor(mMonitor);
if (!mIsStarted) {
RTSPMLOG("mIsStarted is false");
return;
}
if (mTotalBufferSize < aWriteCount) {
RTSPMLOG("mTotalBufferSize < aWriteCount, incoming data is too large");
return;
}
// Checking the incoming data's frame type.
// If we receive MEDIASTREAM_FRAMETYPE_DISCONTINUITY, clear the mFrameType
// imply the RtspTrackBuffer is ready for receive data.
if (aFrameType & MEDIASTREAM_FRAMETYPE_DISCONTINUITY) {
mFrameType = mFrameType & (~MEDIASTREAM_FRAMETYPE_DISCONTINUITY);
RTSPMLOG("Clear mFrameType");
return;
}
// Checking current buffer frame type.
// If the MEDIASTREAM_FRAMETYPE_DISCONTINUNITY bit is set, imply the
// RtspTrackBuffer can't receive data now. So we drop the frame until we
// receive MEDIASTREAM_FRAMETYPE_DISCONTINUNITY.
if (mFrameType & MEDIASTREAM_FRAMETYPE_DISCONTINUITY) {
RTSPMLOG("Return because the mFrameType is set");
return;
}
// Create a timer to delay ReadBuffer() for a duration.
if (mDuringPlayoutDelay && !mPlayoutDelayTimer) {
CreatePlayoutDelayTimer(mPlayoutDelayMs);
}
// The flag is true if the incoming data is larger than one slot size.
bool isMultipleSlots = false;
// The flag is true if the incoming data is larger than remainder free slots
bool returnToHead = false;
// Calculate how many slots the incoming data needed.
int32_t slots = aWriteCount / mSlotSize;
if (aWriteCount % mSlotSize > 0) {
slots++;
}
int32_t i;
RTSPMLOG("WriteBuffer mTrackIdx %d mProducerIdx %d mConsumerIdx %d",
mTrackIdx, mProducerIdx,mConsumerIdx);
if (aWriteCount > mSlotSize) {
isMultipleSlots = true;
}
if (isMultipleSlots &&
(aWriteCount > (BUFFER_SLOT_NUM - mProducerIdx) * mSlotSize)) {
returnToHead = true;
}
RTSPMLOG("slots %d isMultipleSlots %d returnToHead %d",
slots, isMultipleSlots, returnToHead);
if (returnToHead) {
// Clear the rest index of mBufferSlotData[].mLength
for (i = mProducerIdx; i < BUFFER_SLOT_NUM; ++i) {
mBufferSlotData[i].mLength = BUFFER_SLOT_INVALID;
}
// We wrote one or more slots that the decode thread has not yet read.
// So the mConsumerIdx returns to the head of slot buffer and moves forward
// to the oldest slot.
if (mProducerIdx <= mConsumerIdx && mConsumerIdx < mProducerIdx + slots) {
mConsumerIdx = 0;
for (i = mConsumerIdx; i < BUFFER_SLOT_NUM; ++i) {
if (mBufferSlotData[i].mLength > 0) {
mConsumerIdx = i;
break;
}
}
}
mProducerIdx = 0;
}
if (!(aFrameType & MEDIASTREAM_FRAMETYPE_END_OF_STREAM)) {
memcpy(&(mRingBuffer[mSlotSize * mProducerIdx]), aFromBuffer, aWriteCount);
}
// If the buffer is almost full, stop the playout delay to let ReadBuffer()
// consume data in the buffer.
if (mDuringPlayoutDelay && IsBufferOverThreshold()) {
StopPlayoutDelay();
}
if (mProducerIdx <= mConsumerIdx && mConsumerIdx < mProducerIdx + slots
&& mBufferSlotData[mConsumerIdx].mLength > 0) {
// Wrote one or more slots that the decode thread has not yet read.
RTSPMLOG("overwrite!! %d time %lld"
,mTrackIdx,mBufferSlotData[mConsumerIdx].mTime);
if (aFrameType & MEDIASTREAM_FRAMETYPE_END_OF_STREAM) {
mBufferSlotData[mProducerIdx].mLength = 0;
mBufferSlotData[mProducerIdx].mTime = 0;
StopPlayoutDelay();
} else {
mBufferSlotData[mProducerIdx].mLength = aWriteCount;
mBufferSlotData[mProducerIdx].mTime = aFrameTime;
}
mBufferSlotData[mProducerIdx].mFrameType = aFrameType;
// Clear the mBufferSlotDataLength except the start slot.
if (isMultipleSlots) {
for (i = mProducerIdx + 1; i < mProducerIdx + slots; ++i) {
mBufferSlotData[i].mLength = BUFFER_SLOT_INVALID;
}
}
mProducerIdx = (mProducerIdx + slots) % BUFFER_SLOT_NUM;
// Move the mConsumerIdx forward to ensure that the decoder reads the
// oldest data available.
mConsumerIdx = mProducerIdx;
} else {
// Normal case, the writer doesn't take over the reader.
if (aFrameType & MEDIASTREAM_FRAMETYPE_END_OF_STREAM) {
mBufferSlotData[mProducerIdx].mLength = 0;
mBufferSlotData[mProducerIdx].mTime = 0;
StopPlayoutDelay();
} else {
mBufferSlotData[mProducerIdx].mLength = aWriteCount;
mBufferSlotData[mProducerIdx].mTime = aFrameTime;
}
mBufferSlotData[mProducerIdx].mFrameType = aFrameType;
// Clear the mBufferSlotData[].mLength except the start slot.
if (isMultipleSlots) {
for (i = mProducerIdx + 1; i < mProducerIdx + slots; ++i) {
mBufferSlotData[i].mLength = BUFFER_SLOT_INVALID;
}
}
mProducerIdx = (mProducerIdx + slots) % BUFFER_SLOT_NUM;
}
mMonitor.NotifyAll();
}
void RtspTrackBuffer::Reset() {
MonitorAutoLock monitor(mMonitor);
mProducerIdx = 0;
mConsumerIdx = 0;
for (uint32_t i = 0; i < BUFFER_SLOT_NUM; ++i) {
mBufferSlotData[i].mLength = BUFFER_SLOT_EMPTY;
mBufferSlotData[i].mTime = BUFFER_SLOT_EMPTY;
mBufferSlotData[i].mFrameType = MEDIASTREAM_FRAMETYPE_NORMAL;
}
StopPlayoutDelay();
mMonitor.NotifyAll();
}
bool
RtspTrackBuffer::IsBufferOverThreshold()
{
static int32_t numSlotsThreshold =
BUFFER_SLOT_NUM * kBufferThresholdPerc;
int32_t numSlotsUsed = mProducerIdx - mConsumerIdx;
if (numSlotsUsed < 0) { // wrap-around
numSlotsUsed = (BUFFER_SLOT_NUM - mConsumerIdx) + mProducerIdx;
}
if (numSlotsUsed > numSlotsThreshold) {
return true;
}
return false;
}
void
RtspTrackBuffer::CreatePlayoutDelayTimer(unsigned long delayMs)
{
if (delayMs <= 0) {
return;
}
mPlayoutDelayTimer = do_CreateInstance("@mozilla.org/timer;1");
if (mPlayoutDelayTimer) {
mPlayoutDelayTimer->InitWithFuncCallback(PlayoutDelayTimerCallback,
this, delayMs,
nsITimer::TYPE_ONE_SHOT);
}
}
// static
void
RtspTrackBuffer::PlayoutDelayTimerCallback(nsITimer *aTimer,
void *aClosure)
{
MOZ_ASSERT(aTimer);
MOZ_ASSERT(aClosure);
RtspTrackBuffer *self = static_cast<RtspTrackBuffer*>(aClosure);
MonitorAutoLock lock(self->mMonitor);
self->StopPlayoutDelay();
lock.NotifyAll();
}
//-----------------------------------------------------------------------------
// RtspMediaResource
//-----------------------------------------------------------------------------
RtspMediaResource::RtspMediaResource(MediaResourceCallback* aCallback,
nsIChannel* aChannel, nsIURI* aURI, const nsACString& aContentType)
: BaseMediaResource(aCallback, aChannel, aURI, aContentType)
, mIsConnected(false)
, mIsLiveStream(false)
, mHasTimestamp(true)
, mIsSuspend(true)
{
#ifndef NECKO_PROTOCOL_rtsp
MOZ_CRASH("Should not be called except for B2G platform");
#else
MOZ_ASSERT(aChannel);
mMediaStreamController =
static_cast<RtspChannelChild*>(aChannel)->GetController();
MOZ_ASSERT(mMediaStreamController);
mListener = new Listener(this);
mMediaStreamController->AsyncOpen(mListener);
#endif
}
RtspMediaResource::~RtspMediaResource()
{
RTSPMLOG("~RtspMediaResource");
if (mListener) {
// Kill its reference to us since we're going away
mListener->Revoke();
}
}
void RtspMediaResource::SetSuspend(bool aIsSuspend)
{
NS_ASSERTION(!NS_IsMainThread(), "Don't call on main thread");
RTSPMLOG("SetSuspend %d",aIsSuspend);
nsCOMPtr<nsIRunnable> runnable =
NS_NewRunnableMethodWithArg<bool>(this, &RtspMediaResource::NotifySuspend,
aIsSuspend);
NS_DispatchToMainThread(runnable);
}
void RtspMediaResource::NotifySuspend(bool aIsSuspend)
{
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
RTSPMLOG("NotifySuspend %d",aIsSuspend);
mIsSuspend = aIsSuspend;
if (mCallback) {
mCallback->NotifySuspendedStatusChanged();
}
}
size_t
RtspMediaResource::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
{
size_t size = BaseMediaResource::SizeOfExcludingThis(aMallocSizeOf);
size += mTrackBuffer.ShallowSizeOfExcludingThis(aMallocSizeOf);
// Include the size of each track buffer.
for (size_t i = 0; i < mTrackBuffer.Length(); i++) {
size += mTrackBuffer[i]->SizeOfIncludingThis(aMallocSizeOf);
}
// Could add in the future:
// - mMediaStreamController
return size;
}
//----------------------------------------------------------------------------
// RtspMediaResource::Listener
//----------------------------------------------------------------------------
NS_IMPL_ISUPPORTS(RtspMediaResource::Listener,
nsIInterfaceRequestor, nsIStreamingProtocolListener);
nsresult
RtspMediaResource::Listener::OnMediaDataAvailable(uint8_t aTrackIdx,
const nsACString &data,
uint32_t length,
uint32_t offset,
nsIStreamingProtocolMetaData *meta)
{
if (!mResource)
return NS_OK;
return mResource->OnMediaDataAvailable(aTrackIdx, data, length, offset, meta);
}
nsresult
RtspMediaResource::Listener::OnConnected(uint8_t aTrackIdx,
nsIStreamingProtocolMetaData *meta)
{
if (!mResource)
return NS_OK;
return mResource->OnConnected(aTrackIdx, meta);
}
nsresult
RtspMediaResource::Listener::OnDisconnected(uint8_t aTrackIdx, nsresult reason)
{
if (!mResource)
return NS_OK;
return mResource->OnDisconnected(aTrackIdx, reason);
}
nsresult
RtspMediaResource::Listener::GetInterface(const nsIID & aIID, void **aResult)
{
return QueryInterface(aIID, aResult);
}
void
RtspMediaResource::Listener::Revoke()
{
NS_ASSERTION(NS_IsMainThread(), "Don't call on non-main thread");
if (mResource) {
mResource = nullptr;
}
}
nsresult
RtspMediaResource::ReadFrameFromTrack(uint8_t* aBuffer, uint32_t aBufferSize,
uint32_t aTrackIdx, uint32_t& aBytes,
uint64_t& aTime, uint32_t& aFrameSize)
{
NS_ASSERTION(!NS_IsMainThread(), "Don't call on main thread");
NS_ASSERTION(aTrackIdx < mTrackBuffer.Length(),
"ReadTrack index > mTrackBuffer");
MOZ_ASSERT(aBuffer);
if (!mIsConnected) {
RTSPMLOG("ReadFrameFromTrack: RTSP not connected");
return NS_ERROR_FAILURE;
}
return mTrackBuffer[aTrackIdx]->ReadBuffer(aBuffer, aBufferSize, aBytes,
aTime, aFrameSize);
}
nsresult
RtspMediaResource::OnMediaDataAvailable(uint8_t aTrackIdx,
const nsACString &data,
uint32_t length,
uint32_t offset,
nsIStreamingProtocolMetaData *meta)
{
uint64_t time;
uint32_t frameType;
meta->GetTimeStamp(&time);
meta->GetFrameType(&frameType);
mTrackBuffer[aTrackIdx]->WriteBuffer(data.BeginReading(), length, time,
frameType);
return NS_OK;
}
// Bug 962309 - Video RTSP support should be disabled in 1.3
bool
RtspMediaResource::IsVideoEnabled()
{
return Preferences::GetBool("media.rtsp.video.enabled", false);
}
bool
RtspMediaResource::IsVideo(uint8_t tracks, nsIStreamingProtocolMetaData *meta)
{
bool isVideo = false;
for (int i = 0; i < tracks; ++i) {
nsCOMPtr<nsIStreamingProtocolMetaData> trackMeta;
mMediaStreamController->GetTrackMetaData(i, getter_AddRefs(trackMeta));
MOZ_ASSERT(trackMeta);
uint32_t w = 0, h = 0;
trackMeta->GetWidth(&w);
trackMeta->GetHeight(&h);
if (w > 0 || h > 0) {
isVideo = true;
break;
}
}
return isVideo;
}
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);
// If the preference of RTSP video feature is not enabled and the streaming is
// video, we give up moving forward.
if (!IsVideoEnabled() && IsVideo(tracks, meta)) {
// Give up, report error to media element.
mCallback->NotifyDecodeError();
return NS_ERROR_FAILURE;
}
uint64_t durationUs = 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(&durationUs);
// 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 (!mCallback) {
return NS_ERROR_FAILURE;
}
// If the durationUs is 0, imply the stream is live stream.
if (durationUs) {
// Not live stream.
mIsLiveStream = false;
mCallback->SetInfinite(false);
} 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.
mCallback->NotifyDecodeError();
return NS_ERROR_FAILURE;
} else {
mIsLiveStream = true;
bool seekable = false;
mCallback->SetInfinite(true);
mCallback->SetMediaSeekable(seekable);
}
}
MediaDecoderOwner* owner = mCallback->GetMediaOwner();
NS_ENSURE_TRUE(owner, NS_ERROR_FAILURE);
// Fires an initial progress event.
owner->DownloadProgressed();
nsresult rv = mCallback->FinishDecoderSetup(this);
NS_ENSURE_SUCCESS(rv, rv);
mIsConnected = true;
return NS_OK;
}
nsresult
RtspMediaResource::OnDisconnected(uint8_t aTrackIdx, nsresult aReason)
{
NS_ASSERTION(NS_IsMainThread(), "Don't call on non-main thread");
for (uint32_t i = 0 ; i < mTrackBuffer.Length(); ++i) {
mTrackBuffer[i]->Stop();
mTrackBuffer[i]->Reset();
}
if (mCallback) {
if (aReason == NS_ERROR_NOT_INITIALIZED ||
aReason == NS_ERROR_CONNECTION_REFUSED ||
aReason == NS_ERROR_NOT_CONNECTED ||
aReason == NS_ERROR_NET_TIMEOUT) {
// Report error code to Decoder.
RTSPMLOG("Error in OnDisconnected 0x%x", aReason);
mIsConnected = false;
mCallback->NotifyNetworkError();
} else {
// Resetting the decoder and media element when the connection
// between RTSP client and server goes down.
mCallback->ResetConnectionState();
}
}
if (mListener) {
// Note: Listener's Revoke() kills its reference to us, which means it would
// release |this| object. So, ensure it is called in the end of this method.
mListener->Revoke();
}
return NS_OK;
}
void RtspMediaResource::Suspend(bool aCloseImmediately)
{
NS_ASSERTION(NS_IsMainThread(), "Don't call on non-main thread");
mIsSuspend = true;
if (NS_WARN_IF(!mCallback)) {
return;
}
MediaDecoderOwner* owner = mCallback->GetMediaOwner();
NS_ENSURE_TRUE_VOID(owner);
dom::HTMLMediaElement* element = owner->GetMediaElement();
NS_ENSURE_TRUE_VOID(element);
mMediaStreamController->Suspend();
element->DownloadSuspended();
mCallback->NotifySuspendedStatusChanged();
}
void RtspMediaResource::Resume()
{
NS_ASSERTION(NS_IsMainThread(), "Don't call on non-main thread");
mIsSuspend = false;
if (NS_WARN_IF(!mCallback)) {
return;
}
MediaDecoderOwner* owner = mCallback->GetMediaOwner();
NS_ENSURE_TRUE_VOID(owner);
dom::HTMLMediaElement* element = owner->GetMediaElement();
NS_ENSURE_TRUE_VOID(element);
if (mChannel) {
element->DownloadResumed();
}
mMediaStreamController->Resume();
mCallback->NotifySuspendedStatusChanged();
}
nsresult RtspMediaResource::Open(nsIStreamListener **aStreamListener)
{
return NS_OK;
}
nsresult RtspMediaResource::Close()
{
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
mMediaStreamController->Stop();
// Since mCallback is not an nsCOMPtr in BaseMediaResource, we have to
// explicitly set it as null pointer in order to prevent misuse from this
// object (RtspMediaResource).
if (mCallback) {
mCallback = nullptr;
}
return NS_OK;
}
already_AddRefed<nsIPrincipal> RtspMediaResource::GetCurrentPrincipal()
{
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
nsCOMPtr<nsIPrincipal> principal;
nsIScriptSecurityManager* secMan = nsContentUtils::GetSecurityManager();
if (!secMan || !mChannel)
return nullptr;
secMan->GetChannelResultPrincipal(mChannel, getter_AddRefs(principal));
return principal.forget();
}
nsresult RtspMediaResource::SeekTime(int64_t aOffset)
{
NS_ASSERTION(!NS_IsMainThread(), "Don't call on main thread");
RTSPMLOG("Seek requested for aOffset [%lld] for decoder [%p]",
aOffset, mCallback.get());
// Clear buffer and raise the frametype flag.
for(uint32_t i = 0 ; i < mTrackBuffer.Length(); ++i) {
mTrackBuffer[i]->ResetWithFrameType(MEDIASTREAM_FRAMETYPE_DISCONTINUITY);
}
return mMediaStreamController->Seek(aOffset);
}
void
RtspMediaResource::EnablePlayoutDelay()
{
for (uint32_t i = 0; i < mTrackBuffer.Length(); ++i) {
mTrackBuffer[i]->LockStartPlayoutDelay();
}
}
void
RtspMediaResource::DisablePlayoutDelay()
{
for (uint32_t i = 0; i < mTrackBuffer.Length(); ++i) {
mTrackBuffer[i]->LockStopPlayoutDelay();
}
}
} // namespace mozilla
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