talk/media/base/videoframe.h - src/ - Git at Google

 /*
  * libjingle
  * Copyright 2004 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
  *     this list of conditions and the following disclaimer in the documentation
  *     and/or other materials provided with the distribution.
  *  3. The name of the author may not be used to endorse or promote products
  *     derived from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #ifndef TALK_MEDIA_BASE_VIDEOFRAME_H_
 #define TALK_MEDIA_BASE_VIDEOFRAME_H_

 #include "talk/base/basictypes.h"
 #include "talk/base/stream.h"

 namespace cricket {

 // Simple rotation constants.
 enum {
   ROTATION_0 = 0,
   ROTATION_90 = 90,
   ROTATION_180 = 180,
   ROTATION_270 = 270
 };

 // Represents a YUV420 (a.k.a. I420) video frame.
 class VideoFrame {
  public:
   VideoFrame() {}
   virtual ~VideoFrame() {}

   virtual bool InitToBlack(int w, int h, size_t pixel_width,
                            size_t pixel_height, int64 elapsed_time,
                            int64 time_stamp) = 0;
   // Creates a frame from a raw sample with FourCC |format| and size |w| x |h|.
   // |h| can be negative indicating a vertically flipped image.
   // |dw| is destination width; can be less than |w| if cropping is desired.
   // |dh| is destination height, like |dw|, but must be a positive number.
   // Returns whether the function succeeded or failed.
   virtual bool Reset(uint32 fourcc, int w, int h, int dw, int dh, uint8 *sample,
                      size_t sample_size, size_t pixel_width,
                      size_t pixel_height, int64 elapsed_time, int64 time_stamp,
                      int rotation) = 0;

   // Basic accessors.
   virtual size_t GetWidth() const = 0;
   virtual size_t GetHeight() const = 0;
   size_t GetChromaWidth() const { return (GetWidth() + 1) / 2; }
   size_t GetChromaHeight() const { return (GetHeight() + 1) / 2; }
   size_t GetChromaSize() const { return GetUPitch() * GetChromaHeight(); }
   // These can return NULL if the object is not backed by a buffer.
   virtual const uint8 *GetYPlane() const = 0;
   virtual const uint8 *GetUPlane() const = 0;
   virtual const uint8 *GetVPlane() const = 0;
   virtual uint8 *GetYPlane() = 0;
   virtual uint8 *GetUPlane() = 0;
   virtual uint8 *GetVPlane() = 0;

   virtual int32 GetYPitch() const = 0;
   virtual int32 GetUPitch() const = 0;
   virtual int32 GetVPitch() const = 0;

   // Returns the handle of the underlying video frame. This is used when the
   // frame is backed by a texture. The object should be destroyed when it is no
   // longer in use, so the underlying resource can be freed.
   virtual void* GetNativeHandle() const = 0;

   // For retrieving the aspect ratio of each pixel. Usually this is 1x1, but
   // the aspect_ratio_idc parameter of H.264 can specify non-square pixels.
   virtual size_t GetPixelWidth() const = 0;
   virtual size_t GetPixelHeight() const = 0;

   virtual int64 GetElapsedTime() const = 0;
   virtual int64 GetTimeStamp() const = 0;
   virtual void SetElapsedTime(int64 elapsed_time) = 0;
   virtual void SetTimeStamp(int64 time_stamp) = 0;

   // Indicates the rotation angle in degrees.
   virtual int GetRotation() const = 0;

   // Make a shallow copy of the frame. The frame buffer itself is not copied.
   // Both the current and new VideoFrame will share a single reference-counted
   // frame buffer.
   virtual VideoFrame *Copy() const = 0;

   // Since VideoFrame supports shallow copy and the internal frame buffer might
   // be shared, in case VideoFrame needs exclusive access of the frame buffer,
   // user can call MakeExclusive() to make sure the frame buffer is exclusive
   // accessable to the current object.  This might mean a deep copy of the frame
   // buffer if it is currently shared by other objects.
   virtual bool MakeExclusive() = 0;

   // Writes the frame into the given frame buffer, provided that it is of
   // sufficient size. Returns the frame's actual size, regardless of whether
   // it was written or not (like snprintf). If there is insufficient space,
   // nothing is written.
   virtual size_t CopyToBuffer(uint8 *buffer, size_t size) const = 0;

   // Writes the frame into the given planes, stretched to the given width and
   // height. The parameter "interpolate" controls whether to interpolate or just
   // take the nearest-point. The parameter "crop" controls whether to crop this
   // frame to the aspect ratio of the given dimensions before stretching.
   virtual bool CopyToPlanes(
       uint8* dst_y, uint8* dst_u, uint8* dst_v,
       int32 dst_pitch_y, int32 dst_pitch_u, int32 dst_pitch_v) const;

   // Writes the frame into the target VideoFrame.
   virtual void CopyToFrame(VideoFrame* target) const;

   // Writes the frame into the given stream and returns the StreamResult.
   // See talk/base/stream.h for a description of StreamResult and error.
   // Error may be NULL. If a non-success value is returned from
   // StreamInterface::Write(), we immediately return with that value.
   virtual talk_base::StreamResult Write(talk_base::StreamInterface *stream,
                                         int *error);

   // Converts the I420 data to RGB of a certain type such as ARGB and ABGR.
   // Returns the frame's actual size, regardless of whether it was written or
   // not (like snprintf). Parameters size and stride_rgb are in units of bytes.
   // If there is insufficient space, nothing is written.
   virtual size_t ConvertToRgbBuffer(uint32 to_fourcc, uint8 *buffer,
                                     size_t size, int stride_rgb) const = 0;

   // Writes the frame into the given planes, stretched to the given width and
   // height. The parameter "interpolate" controls whether to interpolate or just
   // take the nearest-point. The parameter "crop" controls whether to crop this
   // frame to the aspect ratio of the given dimensions before stretching.
   virtual void StretchToPlanes(
       uint8 *y, uint8 *u, uint8 *v, int32 pitchY, int32 pitchU, int32 pitchV,
       size_t width, size_t height, bool interpolate, bool crop) const;

   // Writes the frame into the given frame buffer, stretched to the given width
   // and height, provided that it is of sufficient size. Returns the frame's
   // actual size, regardless of whether it was written or not (like snprintf).
   // If there is insufficient space, nothing is written. The parameter
   // "interpolate" controls whether to interpolate or just take the
   // nearest-point. The parameter "crop" controls whether to crop this frame to
   // the aspect ratio of the given dimensions before stretching.
   virtual size_t StretchToBuffer(size_t w, size_t h, uint8 *buffer, size_t size,
                                  bool interpolate, bool crop) const;

   // Writes the frame into the target VideoFrame, stretched to the size of that
   // frame. The parameter "interpolate" controls whether to interpolate or just
   // take the nearest-point. The parameter "crop" controls whether to crop this
   // frame to the aspect ratio of the target frame before stretching.
   virtual void StretchToFrame(VideoFrame *target, bool interpolate,
                               bool crop) const;

   // Stretches the frame to the given size, creating a new VideoFrame object to
   // hold it. The parameter "interpolate" controls whether to interpolate or
   // just take the nearest-point. The parameter "crop" controls whether to crop
   // this frame to the aspect ratio of the given dimensions before stretching.
   virtual VideoFrame *Stretch(size_t w, size_t h, bool interpolate,
                               bool crop) const;

   // Sets the video frame to black.
   virtual bool SetToBlack();

   // Tests if sample is valid.  Returns true if valid.
   static bool Validate(uint32 fourcc, int w, int h, const uint8 *sample,
                        size_t sample_size);

   // Size of an I420 image of given dimensions when stored as a frame buffer.
   static size_t SizeOf(size_t w, size_t h) {
     return w * h + ((w + 1) / 2) * ((h + 1) / 2) * 2;
   }

  protected:
   // Creates an empty frame.
   virtual VideoFrame *CreateEmptyFrame(int w, int h, size_t pixel_width,
                                        size_t pixel_height, int64 elapsed_time,
                                        int64 time_stamp) const = 0;
 };

 }  // namespace cricket

 #endif  // TALK_MEDIA_BASE_VIDEOFRAME_H_
	/*
	* libjingle
	* Copyright 2004 Google Inc.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are met:
	*
	* 1. Redistributions of source code must retain the above copyright notice,
	* this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright notice,
	* this list of conditions and the following disclaimer in the documentation
	* and/or other materials provided with the distribution.
	* 3. The name of the author may not be used to endorse or promote products
	* derived from this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
	* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
	* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#ifndef TALK_MEDIA_BASE_VIDEOFRAME_H_
	#define TALK_MEDIA_BASE_VIDEOFRAME_H_

	#include "talk/base/basictypes.h"
	#include "talk/base/stream.h"

	namespace cricket {

	// Simple rotation constants.
	enum {
	ROTATION_0 = 0,
	ROTATION_90 = 90,
	ROTATION_180 = 180,
	ROTATION_270 = 270
	};

	// Represents a YUV420 (a.k.a. I420) video frame.
	class VideoFrame {
	public:
	VideoFrame() {}
	virtual ~VideoFrame() {}

	virtual bool InitToBlack(int w, int h, size_t pixel_width,
	size_t pixel_height, int64 elapsed_time,
	int64 time_stamp) = 0;
	// Creates a frame from a raw sample with FourCC \|format\| and size \|w\| x \|h\|.
	// \|h\| can be negative indicating a vertically flipped image.
	// \|dw\| is destination width; can be less than \|w\| if cropping is desired.
	// \|dh\| is destination height, like \|dw\|, but must be a positive number.
	// Returns whether the function succeeded or failed.
	virtual bool Reset(uint32 fourcc, int w, int h, int dw, int dh, uint8 *sample,
	size_t sample_size, size_t pixel_width,
	size_t pixel_height, int64 elapsed_time, int64 time_stamp,
	int rotation) = 0;

	// Basic accessors.
	virtual size_t GetWidth() const = 0;
	virtual size_t GetHeight() const = 0;
	size_t GetChromaWidth() const { return (GetWidth() + 1) / 2; }
	size_t GetChromaHeight() const { return (GetHeight() + 1) / 2; }
	size_t GetChromaSize() const { return GetUPitch() * GetChromaHeight(); }
	// These can return NULL if the object is not backed by a buffer.
	virtual const uint8 *GetYPlane() const = 0;
	virtual const uint8 *GetUPlane() const = 0;
	virtual const uint8 *GetVPlane() const = 0;
	virtual uint8 *GetYPlane() = 0;
	virtual uint8 *GetUPlane() = 0;
	virtual uint8 *GetVPlane() = 0;

	virtual int32 GetYPitch() const = 0;
	virtual int32 GetUPitch() const = 0;
	virtual int32 GetVPitch() const = 0;

	// Returns the handle of the underlying video frame. This is used when the
	// frame is backed by a texture. The object should be destroyed when it is no
	// longer in use, so the underlying resource can be freed.
	virtual void* GetNativeHandle() const = 0;

	// For retrieving the aspect ratio of each pixel. Usually this is 1x1, but
	// the aspect_ratio_idc parameter of H.264 can specify non-square pixels.
	virtual size_t GetPixelWidth() const = 0;
	virtual size_t GetPixelHeight() const = 0;

	virtual int64 GetElapsedTime() const = 0;
	virtual int64 GetTimeStamp() const = 0;
	virtual void SetElapsedTime(int64 elapsed_time) = 0;
	virtual void SetTimeStamp(int64 time_stamp) = 0;

	// Indicates the rotation angle in degrees.
	virtual int GetRotation() const = 0;

	// Make a shallow copy of the frame. The frame buffer itself is not copied.
	// Both the current and new VideoFrame will share a single reference-counted
	// frame buffer.
	virtual VideoFrame *Copy() const = 0;

	// Since VideoFrame supports shallow copy and the internal frame buffer might
	// be shared, in case VideoFrame needs exclusive access of the frame buffer,
	// user can call MakeExclusive() to make sure the frame buffer is exclusive
	// accessable to the current object. This might mean a deep copy of the frame
	// buffer if it is currently shared by other objects.
	virtual bool MakeExclusive() = 0;

	// Writes the frame into the given frame buffer, provided that it is of
	// sufficient size. Returns the frame's actual size, regardless of whether
	// it was written or not (like snprintf). If there is insufficient space,
	// nothing is written.
	virtual size_t CopyToBuffer(uint8 *buffer, size_t size) const = 0;

	// Writes the frame into the given planes, stretched to the given width and
	// height. The parameter "interpolate" controls whether to interpolate or just
	// take the nearest-point. The parameter "crop" controls whether to crop this
	// frame to the aspect ratio of the given dimensions before stretching.
	virtual bool CopyToPlanes(
	uint8* dst_y, uint8* dst_u, uint8* dst_v,
	int32 dst_pitch_y, int32 dst_pitch_u, int32 dst_pitch_v) const;

	// Writes the frame into the target VideoFrame.
	virtual void CopyToFrame(VideoFrame* target) const;

	// Writes the frame into the given stream and returns the StreamResult.
	// See talk/base/stream.h for a description of StreamResult and error.
	// Error may be NULL. If a non-success value is returned from
	// StreamInterface::Write(), we immediately return with that value.
	virtual talk_base::StreamResult Write(talk_base::StreamInterface *stream,
	int *error);

	// Converts the I420 data to RGB of a certain type such as ARGB and ABGR.
	// Returns the frame's actual size, regardless of whether it was written or
	// not (like snprintf). Parameters size and stride_rgb are in units of bytes.
	// If there is insufficient space, nothing is written.
	virtual size_t ConvertToRgbBuffer(uint32 to_fourcc, uint8 *buffer,
	size_t size, int stride_rgb) const = 0;

	// Writes the frame into the given planes, stretched to the given width and
	// height. The parameter "interpolate" controls whether to interpolate or just
	// take the nearest-point. The parameter "crop" controls whether to crop this
	// frame to the aspect ratio of the given dimensions before stretching.
	virtual void StretchToPlanes(
	uint8 y, uint8 u, uint8 *v, int32 pitchY, int32 pitchU, int32 pitchV,
	size_t width, size_t height, bool interpolate, bool crop) const;

	// Writes the frame into the given frame buffer, stretched to the given width
	// and height, provided that it is of sufficient size. Returns the frame's
	// actual size, regardless of whether it was written or not (like snprintf).
	// If there is insufficient space, nothing is written. The parameter
	// "interpolate" controls whether to interpolate or just take the
	// nearest-point. The parameter "crop" controls whether to crop this frame to
	// the aspect ratio of the given dimensions before stretching.
	virtual size_t StretchToBuffer(size_t w, size_t h, uint8 *buffer, size_t size,
	bool interpolate, bool crop) const;

	// Writes the frame into the target VideoFrame, stretched to the size of that
	// frame. The parameter "interpolate" controls whether to interpolate or just
	// take the nearest-point. The parameter "crop" controls whether to crop this
	// frame to the aspect ratio of the target frame before stretching.
	virtual void StretchToFrame(VideoFrame *target, bool interpolate,
	bool crop) const;

	// Stretches the frame to the given size, creating a new VideoFrame object to
	// hold it. The parameter "interpolate" controls whether to interpolate or
	// just take the nearest-point. The parameter "crop" controls whether to crop
	// this frame to the aspect ratio of the given dimensions before stretching.
	virtual VideoFrame *Stretch(size_t w, size_t h, bool interpolate,
	bool crop) const;

	// Sets the video frame to black.
	virtual bool SetToBlack();

	// Tests if sample is valid. Returns true if valid.
	static bool Validate(uint32 fourcc, int w, int h, const uint8 *sample,
	size_t sample_size);

	// Size of an I420 image of given dimensions when stored as a frame buffer.
	static size_t SizeOf(size_t w, size_t h) {
	return w * h + ((w + 1) / 2) * ((h + 1) / 2) * 2;
	}

	protected:
	// Creates an empty frame.
	virtual VideoFrame *CreateEmptyFrame(int w, int h, size_t pixel_width,
	size_t pixel_height, int64 elapsed_time,
	int64 time_stamp) const = 0;
	};

	} // namespace cricket

	#endif // TALK_MEDIA_BASE_VIDEOFRAME_H_