SurfaceTexture.h revision fe0a87b54654a1392650e7f1862df473287d8332
18ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis/*
28ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis * Copyright (C) 2010 The Android Open Source Project
38ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis *
48ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis * Licensed under the Apache License, Version 2.0 (the "License");
58ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis * you may not use this file except in compliance with the License.
68ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis * You may obtain a copy of the License at
78ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis *
88ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis *      http://www.apache.org/licenses/LICENSE-2.0
98ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis *
108ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis * Unless required by applicable law or agreed to in writing, software
118ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis * distributed under the License is distributed on an "AS IS" BASIS,
128ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
138ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis * See the License for the specific language governing permissions and
148ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis * limitations under the License.
158ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis */
168ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
178ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis#ifndef ANDROID_GUI_SURFACETEXTURE_H
188ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis#define ANDROID_GUI_SURFACETEXTURE_H
198ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
208ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis#include <EGL/egl.h>
218ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis#include <EGL/eglext.h>
228ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis#include <GLES2/gl2.h>
238ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
248ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis#include <gui/ISurfaceTexture.h>
258ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
268ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis#include <ui/GraphicBuffer.h>
278ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
288ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis#include <utils/threads.h>
299a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis#include <utils/Vector.h>
308ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
318ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis#define ANDROID_GRAPHICS_SURFACETEXTURE_JNI_ID "mSurfaceTexture"
328ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
338ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennisnamespace android {
348ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis// ----------------------------------------------------------------------------
358ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
369a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennisclass IGraphicBufferAlloc;
3768c7794183a7dbfe3b20d4ce832f8eb79c2c619aMathias Agopianclass String8;
389a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis
398ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennisclass SurfaceTexture : public BnSurfaceTexture {
408ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennispublic:
419d4d6c101d90d4a1d1ca9413cf3eb89d1f1898d6Jamie Gennis    enum { MIN_UNDEQUEUED_BUFFERS = 2 };
428072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian    enum {
438072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian        MIN_ASYNC_BUFFER_SLOTS = MIN_UNDEQUEUED_BUFFERS + 1,
448072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian        MIN_SYNC_BUFFER_SLOTS  = MIN_UNDEQUEUED_BUFFERS
458072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian    };
468ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    enum { NUM_BUFFER_SLOTS = 32 };
47fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis    enum { NO_CONNECTED_API = 0 };
488ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
49c4d4aeab52435c177ded6abdd578fec8191f0f5dJamie Gennis    struct FrameAvailableListener : public virtual RefBase {
503d8063b02e06020c8062addcc9ec49048d3bdb9aJamie Gennis        // onFrameAvailable() is called from queueBuffer() each time an
513d8063b02e06020c8062addcc9ec49048d3bdb9aJamie Gennis        // additional frame becomes available for consumption. This means that
523d8063b02e06020c8062addcc9ec49048d3bdb9aJamie Gennis        // frames that are queued while in asynchronous mode only trigger the
533d8063b02e06020c8062addcc9ec49048d3bdb9aJamie Gennis        // callback if no previous frames are pending. Frames queued while in
543d8063b02e06020c8062addcc9ec49048d3bdb9aJamie Gennis        // synchronous mode always trigger the callback.
553d8063b02e06020c8062addcc9ec49048d3bdb9aJamie Gennis        //
563d8063b02e06020c8062addcc9ec49048d3bdb9aJamie Gennis        // This is called without any lock held and can be called concurrently
573d8063b02e06020c8062addcc9ec49048d3bdb9aJamie Gennis        // by multiple threads.
58c4d4aeab52435c177ded6abdd578fec8191f0f5dJamie Gennis        virtual void onFrameAvailable() = 0;
59c4d4aeab52435c177ded6abdd578fec8191f0f5dJamie Gennis    };
60c4d4aeab52435c177ded6abdd578fec8191f0f5dJamie Gennis
618ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // tex indicates the name OpenGL texture to which images are to be streamed.
628ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // This texture name cannot be changed once the SurfaceTexture is created.
6314a0e58074f2698829b6554f578e6762c377caa3Grace Kloba    SurfaceTexture(GLuint tex, bool allowSynchronousMode = true);
648ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
658ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    virtual ~SurfaceTexture();
668ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
678ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // setBufferCount updates the number of available buffer slots.  After
688ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // calling this all buffer slots are both unallocated and owned by the
698ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // SurfaceTexture object (i.e. they are not owned by the client).
708ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    virtual status_t setBufferCount(int bufferCount);
718ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
72c04f153353cdb0d291297d10452239f791d3fd2bMathias Agopian    virtual sp<GraphicBuffer> requestBuffer(int buf);
738ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
748ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // dequeueBuffer gets the next buffer slot index for the client to use. If a
758ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // buffer slot is available then that slot index is written to the location
768ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // pointed to by the buf argument and a status of OK is returned.  If no
778ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // slot is available then a status of -EBUSY is returned and buf is
788ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // unmodified.
79c04f153353cdb0d291297d10452239f791d3fd2bMathias Agopian    virtual status_t dequeueBuffer(int *buf, uint32_t w, uint32_t h,
80c04f153353cdb0d291297d10452239f791d3fd2bMathias Agopian            uint32_t format, uint32_t usage);
818ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
821d01a12e7150be569557b64da9b8663c62c13594Eino-Ville Talvala    // queueBuffer returns a filled buffer to the SurfaceTexture. In addition, a
831d01a12e7150be569557b64da9b8663c62c13594Eino-Ville Talvala    // timestamp must be provided for the buffer. The timestamp is in
841d01a12e7150be569557b64da9b8663c62c13594Eino-Ville Talvala    // nanoseconds, and must be monotonically increasing. Its other semantics
851d01a12e7150be569557b64da9b8663c62c13594Eino-Ville Talvala    // (zero point, etc) are client-dependent and should be documented by the
861d01a12e7150be569557b64da9b8663c62c13594Eino-Ville Talvala    // client.
871d01a12e7150be569557b64da9b8663c62c13594Eino-Ville Talvala    virtual status_t queueBuffer(int buf, int64_t timestamp);
888ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    virtual void cancelBuffer(int buf);
898ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    virtual status_t setCrop(const Rect& reg);
908ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    virtual status_t setTransform(uint32_t transform);
918ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
92eafabcdc1639fb96062d9e3c39b0ae27b0238ae1Mathias Agopian    virtual int query(int what, int* value);
93eafabcdc1639fb96062d9e3c39b0ae27b0238ae1Mathias Agopian
948072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian    // setSynchronousMode set whether dequeueBuffer is synchronous or
958072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian    // asynchronous. In synchronous mode, dequeueBuffer blocks until
968072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian    // a buffer is available, the currently bound buffer can be dequeued and
978072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian    // queued buffers will be retired in order.
988072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian    // The default mode is asynchronous.
998072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian    virtual status_t setSynchronousMode(bool enabled);
1008072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian
101fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis    // connect attempts to connect a client API to the SurfaceTexture.  This
102fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis    // must be called before any other ISurfaceTexture methods are called except
103fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis    // for getAllocator.
104fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis    //
105fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis    // This method will fail if the connect was previously called on the
106fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis    // SurfaceTexture and no corresponding disconnect call was made.
107fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis    virtual status_t connect(int api);
108fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis
109fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis    // disconnect attempts to disconnect a client API from the SurfaceTexture.
110fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis    // Calling this method will cause any subsequent calls to other
111fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis    // ISurfaceTexture methods to fail except for getAllocator and connect.
112fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis    // Successfully calling connect after this will allow the other methods to
113fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis    // succeed again.
114fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis    //
115fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis    // This method will fail if the the SurfaceTexture is not currently
116fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis    // connected to the specified client API.
117fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis    virtual status_t disconnect(int api);
118fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis
1198ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // updateTexImage sets the image contents of the target texture to that of
1208ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // the most recently queued buffer.
1218ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    //
1228ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // This call may only be made while the OpenGL ES context to which the
1238ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // target texture belongs is bound to the calling thread.
1248ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    status_t updateTexImage();
1258ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
1268072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian    // setBufferCountServer set the buffer count. If the client has requested
1278072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian    // a buffer count using setBufferCount, the server-buffer count will
1288072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian    // take effect once the client sets the count back to zero.
1298072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian    status_t setBufferCountServer(int bufferCount);
1308072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian
131f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // getTransformMatrix retrieves the 4x4 texture coordinate transform matrix
132f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // associated with the texture image set by the most recent call to
133f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // updateTexImage.
134f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    //
135f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // This transform matrix maps 2D homogeneous texture coordinates of the form
136f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // (s, t, 0, 1) with s and t in the inclusive range [0, 1] to the texture
137f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // coordinate that should be used to sample that location from the texture.
138f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // Sampling the texture outside of the range of this transform is undefined.
139f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    //
140f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // This transform is necessary to compensate for transforms that the stream
141f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // content producer may implicitly apply to the content. By forcing users of
142f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // a SurfaceTexture to apply this transform we avoid performing an extra
143f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // copy of the data that would be needed to hide the transform from the
144f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // user.
145f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    //
146f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // The matrix is stored in column-major order so that it may be passed
147f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // directly to OpenGL ES via the glLoadMatrixf or glUniformMatrix4fv
148f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // functions.
149f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    void getTransformMatrix(float mtx[16]);
150f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis
1511d01a12e7150be569557b64da9b8663c62c13594Eino-Ville Talvala    // getTimestamp retrieves the timestamp associated with the texture image
1521d01a12e7150be569557b64da9b8663c62c13594Eino-Ville Talvala    // set by the most recent call to updateTexImage.
1531d01a12e7150be569557b64da9b8663c62c13594Eino-Ville Talvala    //
1541d01a12e7150be569557b64da9b8663c62c13594Eino-Ville Talvala    // The timestamp is in nanoseconds, and is monotonically increasing. Its
1551d01a12e7150be569557b64da9b8663c62c13594Eino-Ville Talvala    // other semantics (zero point, etc) are source-dependent and should be
1561d01a12e7150be569557b64da9b8663c62c13594Eino-Ville Talvala    // documented by the source.
1571d01a12e7150be569557b64da9b8663c62c13594Eino-Ville Talvala    int64_t getTimestamp();
1581d01a12e7150be569557b64da9b8663c62c13594Eino-Ville Talvala
159c4d4aeab52435c177ded6abdd578fec8191f0f5dJamie Gennis    // setFrameAvailableListener sets the listener object that will be notified
160c4d4aeab52435c177ded6abdd578fec8191f0f5dJamie Gennis    // when a new frame becomes available.
161292a31a4c2ae2f6faf134e8e4a726583017dad06Pannag Sanketi    void setFrameAvailableListener(const sp<FrameAvailableListener>& listener);
162c4d4aeab52435c177ded6abdd578fec8191f0f5dJamie Gennis
1631b20cde313b5ef8acdace742328df867956d24cbJamie Gennis    // getAllocator retrieves the binder object that must be referenced as long
1641b20cde313b5ef8acdace742328df867956d24cbJamie Gennis    // as the GraphicBuffers dequeued from this SurfaceTexture are referenced.
1651b20cde313b5ef8acdace742328df867956d24cbJamie Gennis    // Holding this binder reference prevents SurfaceFlinger from freeing the
1661b20cde313b5ef8acdace742328df867956d24cbJamie Gennis    // buffers before the client is done with them.
1671b20cde313b5ef8acdace742328df867956d24cbJamie Gennis    sp<IBinder> getAllocator();
1681b20cde313b5ef8acdace742328df867956d24cbJamie Gennis
169a5c75c01620179ce00812354778a29a80d76e71fMathias Agopian    // setDefaultBufferSize is used to set the size of buffers returned by
170a5c75c01620179ce00812354778a29a80d76e71fMathias Agopian    // requestBuffers when a with and height of zero is requested.
171a5c75c01620179ce00812354778a29a80d76e71fMathias Agopian    // A call to setDefaultBufferSize() may trigger requestBuffers() to
172a5c75c01620179ce00812354778a29a80d76e71fMathias Agopian    // be called from the client.
173a5c75c01620179ce00812354778a29a80d76e71fMathias Agopian    status_t setDefaultBufferSize(uint32_t w, uint32_t h);
174a5c75c01620179ce00812354778a29a80d76e71fMathias Agopian
1757a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopian    // getCurrentBuffer returns the buffer associated with the current image.
1767a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopian    sp<GraphicBuffer> getCurrentBuffer() const;
1777a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopian
1787a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopian    // getCurrentTextureTarget returns the texture target of the current
1797a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopian    // texture as returned by updateTexImage().
1807a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopian    GLenum getCurrentTextureTarget() const;
1817a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopian
1827a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopian    // getCurrentCrop returns the cropping rectangle of the current buffer
1837a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopian    Rect getCurrentCrop() const;
1847a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopian
1857a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopian    // getCurrentTransform returns the transform of the current buffer
1867a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopian    uint32_t getCurrentTransform() const;
1877a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopian
18868c7794183a7dbfe3b20d4ce832f8eb79c2c619aMathias Agopian    // dump our state in a String
18968c7794183a7dbfe3b20d4ce832f8eb79c2c619aMathias Agopian    void dump(String8& result) const;
19068c7794183a7dbfe3b20d4ce832f8eb79c2c619aMathias Agopian    void dump(String8& result, const char* prefix, char* buffer, size_t SIZE) const;
19168c7794183a7dbfe3b20d4ce832f8eb79c2c619aMathias Agopian
1927a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopianprotected:
1938ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
1948ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // freeAllBuffers frees the resources (both GraphicBuffer and EGLImage) for
1958ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // all slots.
1968ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    void freeAllBuffers();
1977a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopian    static bool isExternalFormat(uint32_t format);
1987a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopian    static GLenum getTextureTarget(uint32_t format);
1997a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopian
2007a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopianprivate:
2018ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
2028ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // createImage creates a new EGLImage from a GraphicBuffer.
2038ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    EGLImageKHR createImage(EGLDisplay dpy,
2048ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis            const sp<GraphicBuffer>& graphicBuffer);
2058ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
2068072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian    status_t setBufferCountServerLocked(int bufferCount);
2078072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian
208736aa9573bb7b78f9c315f396c104491b3639426Jamie Gennis    // computeCurrentTransformMatrix computes the transform matrix for the
209736aa9573bb7b78f9c315f396c104491b3639426Jamie Gennis    // current texture.  It uses mCurrentTransform and the current GraphicBuffer
210736aa9573bb7b78f9c315f396c104491b3639426Jamie Gennis    // to compute this matrix and stores it in mCurrentTransformMatrix.
211736aa9573bb7b78f9c315f396c104491b3639426Jamie Gennis    void computeCurrentTransformMatrix();
212736aa9573bb7b78f9c315f396c104491b3639426Jamie Gennis
2138ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    enum { INVALID_BUFFER_SLOT = -1 };
2148ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
2158ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    struct BufferSlot {
216b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian
217b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian        BufferSlot()
218b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian            : mEglImage(EGL_NO_IMAGE_KHR),
219b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian              mEglDisplay(EGL_NO_DISPLAY),
220b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian              mBufferState(BufferSlot::FREE),
221b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian              mRequestBufferCalled(false),
2228cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis              mTransform(0),
2238cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis              mTimestamp(0) {
2248cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            mCrop.makeInvalid();
225b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian        }
226b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian
2278ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis        // mGraphicBuffer points to the buffer allocated for this slot or is NULL
2288ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis        // if no buffer has been allocated.
2298ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis        sp<GraphicBuffer> mGraphicBuffer;
2308ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
2318ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis        // mEglImage is the EGLImage created from mGraphicBuffer.
2328ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis        EGLImageKHR mEglImage;
2338ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
2348ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis        // mEglDisplay is the EGLDisplay used to create mEglImage.
2358ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis        EGLDisplay mEglDisplay;
2368ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
2378cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis        // BufferState represents the different states in which a buffer slot
2388cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis        // can be.
2398cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis        enum BufferState {
2408cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            // FREE indicates that the buffer is not currently being used and
2418cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            // will not be used in the future until it gets dequeued and
2428cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            // subseqently queued by the client.
2438cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            FREE = 0,
2448cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis
2458cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            // DEQUEUED indicates that the buffer has been dequeued by the
2468cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            // client, but has not yet been queued or canceled. The buffer is
2478cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            // considered 'owned' by the client, and the server should not use
2488cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            // it for anything.
2498cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            //
2508cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            // Note that when in synchronous-mode (mSynchronousMode == true),
2518cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            // the buffer that's currently attached to the texture may be
2528cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            // dequeued by the client.  That means that the current buffer can
2538cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            // be in either the DEQUEUED or QUEUED state.  In asynchronous mode,
2548cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            // however, the current buffer is always in the QUEUED state.
2558cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            DEQUEUED = 1,
2568cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis
2578cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            // QUEUED indicates that the buffer has been queued by the client,
2588cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            // and has not since been made available for the client to dequeue.
2598cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            // Attaching the buffer to the texture does NOT transition the
2608cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            // buffer away from the QUEUED state. However, in Synchronous mode
2618cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            // the current buffer may be dequeued by the client under some
2628cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            // circumstances. See the note about the current buffer in the
2638cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            // documentation for DEQUEUED.
2648cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis            QUEUED = 2,
2658cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis        };
2668cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis
2678cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis        // mBufferState is the current state of this buffer slot.
2688cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis        BufferState mBufferState;
269b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian
270b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian        // mRequestBufferCalled is used for validating that the client did
271b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian        // call requestBuffer() when told to do so. Technically this is not
272b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian        // needed but useful for debugging and catching client bugs.
273b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian        bool mRequestBufferCalled;
274b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian
2758cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis        // mCrop is the current crop rectangle for this buffer slot. This gets
2768cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis        // set to mNextCrop each time queueBuffer gets called for this buffer.
2778cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis        Rect mCrop;
278b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian
2798cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis        // mTransform is the current transform flags for this buffer slot. This
2808cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis        // gets set to mNextTransform each time queueBuffer gets called for this
2818cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis        // slot.
2828cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis        uint32_t mTransform;
283b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian
2848cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis        // mTimestamp is the current timestamp for this buffer slot. This gets
2858cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis        // to set by queueBuffer each time this slot is queued.
2868cd5ba4b7f01d3a54a8f8bc6d1793aa5fc8e09efJamie Gennis        int64_t mTimestamp;
2878ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    };
2888ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
2898ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // mSlots is the array of buffer slots that must be mirrored on the client
2908ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // side. This allows buffer ownership to be transferred between the client
2918ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // and server without sending a GraphicBuffer over binder. The entire array
2928ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // is initialized to NULL at construction time, and buffers are allocated
2938ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // for a slot when requestBuffer is called with that slot's index.
2948ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    BufferSlot mSlots[NUM_BUFFER_SLOTS];
2958ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
296a5c75c01620179ce00812354778a29a80d76e71fMathias Agopian    // mDefaultWidth holds the default width of allocated buffers. It is used
297a5c75c01620179ce00812354778a29a80d76e71fMathias Agopian    // in requestBuffers() if a width and height of zero is specified.
298a5c75c01620179ce00812354778a29a80d76e71fMathias Agopian    uint32_t mDefaultWidth;
299a5c75c01620179ce00812354778a29a80d76e71fMathias Agopian
300a5c75c01620179ce00812354778a29a80d76e71fMathias Agopian    // mDefaultHeight holds the default height of allocated buffers. It is used
301a5c75c01620179ce00812354778a29a80d76e71fMathias Agopian    // in requestBuffers() if a width and height of zero is specified.
302a5c75c01620179ce00812354778a29a80d76e71fMathias Agopian    uint32_t mDefaultHeight;
303a5c75c01620179ce00812354778a29a80d76e71fMathias Agopian
304a5c75c01620179ce00812354778a29a80d76e71fMathias Agopian    // mPixelFormat holds the pixel format of allocated buffers. It is used
305a5c75c01620179ce00812354778a29a80d76e71fMathias Agopian    // in requestBuffers() if a format of zero is specified.
306a5c75c01620179ce00812354778a29a80d76e71fMathias Agopian    uint32_t mPixelFormat;
307a5c75c01620179ce00812354778a29a80d76e71fMathias Agopian
3088ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // mBufferCount is the number of buffer slots that the client and server
3098072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian    // must maintain. It defaults to MIN_ASYNC_BUFFER_SLOTS and can be changed
3108072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian    // by calling setBufferCount or setBufferCountServer
3118ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    int mBufferCount;
3128ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
313ae468f43418c3cbae74c7f546283f6bb4e4df690Jamie Gennis    // mClientBufferCount is the number of buffer slots requested by the client.
314ae468f43418c3cbae74c7f546283f6bb4e4df690Jamie Gennis    // The default is zero, which means the client doesn't care how many buffers
315ae468f43418c3cbae74c7f546283f6bb4e4df690Jamie Gennis    // there is.
3168072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian    int mClientBufferCount;
3178072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian
3188072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian    // mServerBufferCount buffer count requested by the server-side
3198072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian    int mServerBufferCount;
3208072711307aa98ee5ee6f7369860ae38c3e19656Mathias Agopian
3218ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // mCurrentTexture is the buffer slot index of the buffer that is currently
32267eedd74ab78c2bfed9fcdc74947b97289254ca4Jamie Gennis    // bound to the OpenGL texture. It is initialized to INVALID_BUFFER_SLOT,
32367eedd74ab78c2bfed9fcdc74947b97289254ca4Jamie Gennis    // indicating that no buffer slot is currently bound to the texture. Note,
32467eedd74ab78c2bfed9fcdc74947b97289254ca4Jamie Gennis    // however, that a value of INVALID_BUFFER_SLOT does not necessarily mean
32567eedd74ab78c2bfed9fcdc74947b97289254ca4Jamie Gennis    // that no buffer is bound to the texture. A call to setBufferCount will
32667eedd74ab78c2bfed9fcdc74947b97289254ca4Jamie Gennis    // reset mCurrentTexture to INVALID_BUFFER_SLOT.
3278ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    int mCurrentTexture;
3288ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
3297a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopian    // mCurrentTextureTarget is the GLES texture target to be used with the
3307a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopian    // current texture.
3317a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopian    GLenum mCurrentTextureTarget;
3327a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopian
3339a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis    // mCurrentTextureBuf is the graphic buffer of the current texture. It's
3349a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis    // possible that this buffer is not associated with any buffer slot, so we
3359a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis    // must track it separately in order to properly use
3369a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis    // IGraphicBufferAlloc::freeAllGraphicBuffersExcept.
3379a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis    sp<GraphicBuffer> mCurrentTextureBuf;
3389a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis
339f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // mCurrentCrop is the crop rectangle that applies to the current texture.
340f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // It gets set to mLastQueuedCrop each time updateTexImage is called.
341f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    Rect mCurrentCrop;
342f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis
343f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // mCurrentTransform is the transform identifier for the current texture. It
344f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // gets set to mLastQueuedTransform each time updateTexImage is called.
345f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    uint32_t mCurrentTransform;
346f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis
347736aa9573bb7b78f9c315f396c104491b3639426Jamie Gennis    // mCurrentTransformMatrix is the transform matrix for the current texture.
348736aa9573bb7b78f9c315f396c104491b3639426Jamie Gennis    // It gets computed by computeTransformMatrix each time updateTexImage is
349736aa9573bb7b78f9c315f396c104491b3639426Jamie Gennis    // called.
350736aa9573bb7b78f9c315f396c104491b3639426Jamie Gennis    float mCurrentTransformMatrix[16];
351736aa9573bb7b78f9c315f396c104491b3639426Jamie Gennis
3521d01a12e7150be569557b64da9b8663c62c13594Eino-Ville Talvala    // mCurrentTimestamp is the timestamp for the current texture. It
3531d01a12e7150be569557b64da9b8663c62c13594Eino-Ville Talvala    // gets set to mLastQueuedTimestamp each time updateTexImage is called.
3541d01a12e7150be569557b64da9b8663c62c13594Eino-Ville Talvala    int64_t mCurrentTimestamp;
3551d01a12e7150be569557b64da9b8663c62c13594Eino-Ville Talvala
356f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // mNextCrop is the crop rectangle that will be used for the next buffer
357f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // that gets queued. It is set by calling setCrop.
358f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    Rect mNextCrop;
359f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis
360f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // mNextTransform is the transform identifier that will be used for the next
361f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    // buffer that gets queued. It is set by calling setTransform.
362f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis    uint32_t mNextTransform;
363f238e28500ca756fbd9e323f728ce7c8dda59475Jamie Gennis
3648ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // mTexName is the name of the OpenGL texture to which streamed images will
365292a31a4c2ae2f6faf134e8e4a726583017dad06Pannag Sanketi    // be bound when updateTexImage is called. It is set at construction time
3668ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // changed with a call to setTexName.
3678ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    const GLuint mTexName;
3688ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
3699a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis    // mGraphicBufferAlloc is the connection to SurfaceFlinger that is used to
3709a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis    // allocate new GraphicBuffer objects.
3719a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis    sp<IGraphicBufferAlloc> mGraphicBufferAlloc;
3729a78c90cd46b2a3bd637b056873149d3b94384b4Jamie Gennis
373c4d4aeab52435c177ded6abdd578fec8191f0f5dJamie Gennis    // mFrameAvailableListener is the listener object that will be called when a
374c4d4aeab52435c177ded6abdd578fec8191f0f5dJamie Gennis    // new frame becomes available. If it is not NULL it will be called from
375c4d4aeab52435c177ded6abdd578fec8191f0f5dJamie Gennis    // queueBuffer.
376c4d4aeab52435c177ded6abdd578fec8191f0f5dJamie Gennis    sp<FrameAvailableListener> mFrameAvailableListener;
377c4d4aeab52435c177ded6abdd578fec8191f0f5dJamie Gennis
378b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian    // mSynchronousMode whether we're in synchronous mode or not
379b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian    bool mSynchronousMode;
380b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian
38114a0e58074f2698829b6554f578e6762c377caa3Grace Kloba    // mAllowSynchronousMode whether we allow synchronous mode or not
38214a0e58074f2698829b6554f578e6762c377caa3Grace Kloba    const bool mAllowSynchronousMode;
38314a0e58074f2698829b6554f578e6762c377caa3Grace Kloba
384fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis    // mConnectedApi indicates the API that is currently connected to this
385fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis    // SurfaceTexture.  It defaults to NO_CONNECTED_API (= 0), and gets updated
386fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis    // by the connect and disconnect methods.
387fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis    int mConnectedApi;
388fe0a87b54654a1392650e7f1862df473287d8332Jamie Gennis
389b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian    // mDequeueCondition condition used for dequeueBuffer in synchronous mode
390b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian    mutable Condition mDequeueCondition;
391b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian
392b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian    // mQueue is a FIFO of queued buffers used in synchronous mode
393b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian    typedef Vector<int> Fifo;
394b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian    Fifo mQueue;
395b3e518c820c7dbe35587bd45c510e4e5e7cfd9c9Mathias Agopian
3968ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // mMutex is the mutex used to prevent concurrent access to the member
3978ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // variables of SurfaceTexture objects. It must be locked whenever the
3988ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis    // member variables are accessed.
3997a042bf324fe3f3d5d4085fda21fe50dc0c362b4Mathias Agopian    mutable Mutex mMutex;
400736aa9573bb7b78f9c315f396c104491b3639426Jamie Gennis
4018ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis};
4028ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
4038ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis// ----------------------------------------------------------------------------
4048ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis}; // namespace android
4058ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis
4068ba32fade11abb73f3fd47ea0953c9528eb5b91fJamie Gennis#endif // ANDROID_GUI_SURFACETEXTURE_H
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