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/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef WEBRTC_VIDEO_ENGINE_VIE_FRAME_PROVIDER_BASE_H_
#define WEBRTC_VIDEO_ENGINE_VIE_FRAME_PROVIDER_BASE_H_
#include <vector>
#include "webrtc/common_types.h"
#include "webrtc/system_wrappers/interface/scoped_ptr.h"
#include "webrtc/typedefs.h"
namespace webrtc {
class CriticalSectionWrapper;
class VideoEncoder;
class I420VideoFrame;
// ViEFrameCallback shall be implemented by all classes receiving frames from a
// frame provider.
class ViEFrameCallback {
public:
virtual void DeliverFrame(int id,
I420VideoFrame* video_frame,
int num_csrcs = 0,
const uint32_t CSRC[kRtpCsrcSize] = NULL) = 0;
// The capture delay has changed from the provider. |frame_delay| is given in
// ms.
virtual void DelayChanged(int id, int frame_delay) = 0;
// Get the width, height and frame rate preferred by this observer.
virtual int GetPreferedFrameSettings(int* width,
int* height,
int* frame_rate) = 0;
// ProviderDestroyed is called when the frame is about to be destroyed. There
// must not be any more calls to the frame provider after this.
virtual void ProviderDestroyed(int id) = 0;
virtual ~ViEFrameCallback() {}
};
// ViEFrameProviderBase is a base class that will deliver frames to all
// registered ViEFrameCallbacks.
class ViEFrameProviderBase {
public:
ViEFrameProviderBase(int Id, int engine_id);
virtual ~ViEFrameProviderBase();
// Returns the frame provider id.
int Id();
// Register frame callbacks, i.e. a receiver of the captured frame.
virtual int RegisterFrameCallback(int observer_id,
ViEFrameCallback* callback_object);
virtual int DeregisterFrameCallback(const ViEFrameCallback* callback_object);
virtual bool IsFrameCallbackRegistered(
const ViEFrameCallback* callback_object);
int NumberOfRegisteredFrameCallbacks();
// FrameCallbackChanged
// Inherited classes should check for new frame_settings and reconfigure
// output if possible.
virtual int FrameCallbackChanged() = 0;
protected:
void DeliverFrame(I420VideoFrame* video_frame,
int num_csrcs = 0,
const uint32_t CSRC[kRtpCsrcSize] = NULL);
void SetFrameDelay(int frame_delay);
int FrameDelay();
int GetBestFormat(int* best_width,
int* best_height,
int* best_frame_rate);
int id_;
int engine_id_;
// Frame callbacks.
typedef std::vector<ViEFrameCallback*> FrameCallbacks;
FrameCallbacks frame_callbacks_;
scoped_ptr<CriticalSectionWrapper> provider_cs_;
private:
scoped_ptr<I420VideoFrame> extra_frame_;
int frame_delay_;
};
} // namespace webrtc
#endif // WEBRTC_VIDEO_ENGINE_VIE_FRAME_PROVIDER_BASE_H_
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