503 lines
16 KiB
C++
503 lines
16 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "SurfaceTexture"
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//#define LOG_NDEBUG 0
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#define GL_GLEXT_PROTOTYPES
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#define EGL_EGLEXT_PROTOTYPES
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#include <EGL/egl.h>
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#include <EGL/eglext.h>
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#include <GLES2/gl2.h>
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#include <GLES2/gl2ext.h>
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#include <hardware/hardware.h>
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#include <gui/IGraphicBufferAlloc.h>
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#include <gui/ISurfaceComposer.h>
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#include <gui/SurfaceComposerClient.h>
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#include <gui/SurfaceTexture.h>
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#include <private/gui/ComposerService.h>
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#include <utils/Log.h>
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#include <utils/String8.h>
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// This compile option makes SurfaceTexture use the EGL_KHR_fence_sync extension
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// to synchronize access to the buffers. It will cause dequeueBuffer to stall,
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// waiting for the GL reads for the buffer being dequeued to complete before
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// allowing the buffer to be dequeued.
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#ifdef USE_FENCE_SYNC
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#ifdef ALLOW_DEQUEUE_CURRENT_BUFFER
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#error "USE_FENCE_SYNC and ALLOW_DEQUEUE_CURRENT_BUFFER are incompatible"
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#endif
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#endif
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// Macros for including the SurfaceTexture name in log messages
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#define ST_LOGV(x, ...) ALOGV("[%s] "x, mName.string(), ##__VA_ARGS__)
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#define ST_LOGD(x, ...) ALOGD("[%s] "x, mName.string(), ##__VA_ARGS__)
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#define ST_LOGI(x, ...) ALOGI("[%s] "x, mName.string(), ##__VA_ARGS__)
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#define ST_LOGW(x, ...) ALOGW("[%s] "x, mName.string(), ##__VA_ARGS__)
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#define ST_LOGE(x, ...) ALOGE("[%s] "x, mName.string(), ##__VA_ARGS__)
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namespace android {
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// Transform matrices
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static float mtxIdentity[16] = {
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1, 0, 0, 0,
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0, 1, 0, 0,
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0, 0, 1, 0,
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0, 0, 0, 1,
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};
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static float mtxFlipH[16] = {
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-1, 0, 0, 0,
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0, 1, 0, 0,
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0, 0, 1, 0,
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1, 0, 0, 1,
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};
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static float mtxFlipV[16] = {
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1, 0, 0, 0,
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0, -1, 0, 0,
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0, 0, 1, 0,
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0, 1, 0, 1,
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};
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static float mtxRot90[16] = {
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0, 1, 0, 0,
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-1, 0, 0, 0,
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0, 0, 1, 0,
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1, 0, 0, 1,
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};
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static float mtxRot180[16] = {
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-1, 0, 0, 0,
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0, -1, 0, 0,
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0, 0, 1, 0,
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1, 1, 0, 1,
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};
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static float mtxRot270[16] = {
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0, -1, 0, 0,
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1, 0, 0, 0,
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0, 0, 1, 0,
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0, 1, 0, 1,
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};
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static void mtxMul(float out[16], const float a[16], const float b[16]);
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// Get an ID that's unique within this process.
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static int32_t createProcessUniqueId() {
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static volatile int32_t globalCounter = 0;
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return android_atomic_inc(&globalCounter);
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}
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SurfaceTexture::SurfaceTexture(GLuint tex, bool allowSynchronousMode,
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GLenum texTarget, bool useFenceSync) :
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BufferQueue(allowSynchronousMode),
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mCurrentTransform(0),
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mCurrentTimestamp(0),
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mTexName(tex),
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#ifdef USE_FENCE_SYNC
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mUseFenceSync(useFenceSync),
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#else
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mUseFenceSync(false),
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#endif
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mTexTarget(texTarget),
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mAbandoned(false),
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mCurrentTexture(BufferQueue::INVALID_BUFFER_SLOT)
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{
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// Choose a name using the PID and a process-unique ID.
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mName = String8::format("unnamed-%d-%d", getpid(), createProcessUniqueId());
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BufferQueue::setConsumerName(mName);
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ST_LOGV("SurfaceTexture");
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memcpy(mCurrentTransformMatrix, mtxIdentity,
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sizeof(mCurrentTransformMatrix));
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}
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SurfaceTexture::~SurfaceTexture() {
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ST_LOGV("~SurfaceTexture");
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abandon();
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}
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status_t SurfaceTexture::setBufferCountServer(int bufferCount) {
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Mutex::Autolock lock(mMutex);
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return BufferQueue::setBufferCountServer(bufferCount);
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}
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status_t SurfaceTexture::setDefaultBufferSize(uint32_t w, uint32_t h)
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{
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return BufferQueue::setDefaultBufferSize(w, h);
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}
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status_t SurfaceTexture::updateTexImage() {
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ST_LOGV("updateTexImage");
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Mutex::Autolock lock(mMutex);
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if (mAbandoned) {
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ST_LOGE("calling updateTexImage() on an abandoned SurfaceTexture");
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return NO_INIT;
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}
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BufferItem item;
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// In asynchronous mode the list is guaranteed to be one buffer
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// deep, while in synchronous mode we use the oldest buffer.
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if (acquire(&item) == NO_ERROR) {
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int buf = item.mBuf;
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// This buffer was newly allocated, so we need to clean up on our side
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if (item.mGraphicBuffer != NULL) {
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mEGLSlots[buf].mGraphicBuffer = 0;
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if (mEGLSlots[buf].mEglImage != EGL_NO_IMAGE_KHR) {
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eglDestroyImageKHR(mEGLSlots[buf].mEglDisplay,
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mEGLSlots[buf].mEglImage);
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mEGLSlots[buf].mEglImage = EGL_NO_IMAGE_KHR;
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mEGLSlots[buf].mEglDisplay = EGL_NO_DISPLAY;
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}
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mEGLSlots[buf].mGraphicBuffer = item.mGraphicBuffer;
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}
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// Update the GL texture object.
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EGLImageKHR image = mEGLSlots[buf].mEglImage;
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EGLDisplay dpy = eglGetCurrentDisplay();
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if (image == EGL_NO_IMAGE_KHR) {
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if (item.mGraphicBuffer == 0) {
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ST_LOGE("buffer at slot %d is null", buf);
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return BAD_VALUE;
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}
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image = createImage(dpy, item.mGraphicBuffer);
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mEGLSlots[buf].mEglImage = image;
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mEGLSlots[buf].mEglDisplay = dpy;
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if (image == EGL_NO_IMAGE_KHR) {
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// NOTE: if dpy was invalid, createImage() is guaranteed to
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// fail. so we'd end up here.
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return -EINVAL;
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}
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}
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GLint error;
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while ((error = glGetError()) != GL_NO_ERROR) {
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ST_LOGW("updateTexImage: clearing GL error: %#04x", error);
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}
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glBindTexture(mTexTarget, mTexName);
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glEGLImageTargetTexture2DOES(mTexTarget, (GLeglImageOES)image);
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bool failed = false;
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while ((error = glGetError()) != GL_NO_ERROR) {
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ST_LOGE("error binding external texture image %p (slot %d): %#04x",
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image, buf, error);
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failed = true;
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}
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if (failed) {
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releaseBuffer(buf, mEGLSlots[buf].mEglDisplay,
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mEGLSlots[buf].mFence);
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return -EINVAL;
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}
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if (mCurrentTexture != INVALID_BUFFER_SLOT) {
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if (mUseFenceSync) {
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EGLSyncKHR fence = eglCreateSyncKHR(dpy, EGL_SYNC_FENCE_KHR,
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NULL);
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if (fence == EGL_NO_SYNC_KHR) {
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ALOGE("updateTexImage: error creating fence: %#x",
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eglGetError());
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releaseBuffer(buf, mEGLSlots[buf].mEglDisplay,
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mEGLSlots[buf].mFence);
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return -EINVAL;
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}
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glFlush();
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mEGLSlots[mCurrentTexture].mFence = fence;
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}
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}
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ST_LOGV("updateTexImage: (slot=%d buf=%p) -> (slot=%d buf=%p)",
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mCurrentTexture,
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mCurrentTextureBuf != NULL ? mCurrentTextureBuf->handle : 0,
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buf, item.mGraphicBuffer->handle);
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// release old buffer
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releaseBuffer(mCurrentTexture,
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mEGLSlots[mCurrentTexture].mEglDisplay,
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mEGLSlots[mCurrentTexture].mFence);
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// Update the SurfaceTexture state.
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mCurrentTexture = buf;
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mCurrentTextureBuf = mEGLSlots[buf].mGraphicBuffer;
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mCurrentCrop = item.mCrop;
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mCurrentTransform = item.mTransform;
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mCurrentScalingMode = item.mScalingMode;
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mCurrentTimestamp = item.mTimestamp;
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computeCurrentTransformMatrix();
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// Now that we've passed the point at which failures can happen,
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// it's safe to remove the buffer from the front of the queue.
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} else {
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// We always bind the texture even if we don't update its contents.
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glBindTexture(mTexTarget, mTexName);
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}
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return OK;
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}
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bool SurfaceTexture::isExternalFormat(uint32_t format)
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{
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switch (format) {
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// supported YUV formats
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case HAL_PIXEL_FORMAT_YV12:
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// Legacy/deprecated YUV formats
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case HAL_PIXEL_FORMAT_YCbCr_422_SP:
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case HAL_PIXEL_FORMAT_YCrCb_420_SP:
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case HAL_PIXEL_FORMAT_YCbCr_422_I:
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return true;
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}
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// Any OEM format needs to be considered
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if (format>=0x100 && format<=0x1FF)
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return true;
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return false;
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}
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GLenum SurfaceTexture::getCurrentTextureTarget() const {
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return mTexTarget;
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}
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void SurfaceTexture::getTransformMatrix(float mtx[16]) {
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Mutex::Autolock lock(mMutex);
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memcpy(mtx, mCurrentTransformMatrix, sizeof(mCurrentTransformMatrix));
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}
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void SurfaceTexture::computeCurrentTransformMatrix() {
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ST_LOGV("computeCurrentTransformMatrix");
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float xform[16];
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for (int i = 0; i < 16; i++) {
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xform[i] = mtxIdentity[i];
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}
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if (mCurrentTransform & NATIVE_WINDOW_TRANSFORM_FLIP_H) {
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float result[16];
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mtxMul(result, xform, mtxFlipH);
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for (int i = 0; i < 16; i++) {
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xform[i] = result[i];
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}
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}
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if (mCurrentTransform & NATIVE_WINDOW_TRANSFORM_FLIP_V) {
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float result[16];
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mtxMul(result, xform, mtxFlipV);
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for (int i = 0; i < 16; i++) {
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xform[i] = result[i];
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}
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}
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if (mCurrentTransform & NATIVE_WINDOW_TRANSFORM_ROT_90) {
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float result[16];
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mtxMul(result, xform, mtxRot90);
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for (int i = 0; i < 16; i++) {
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xform[i] = result[i];
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}
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}
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sp<GraphicBuffer>& buf(mCurrentTextureBuf);
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float tx, ty, sx, sy;
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if (!mCurrentCrop.isEmpty()) {
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// In order to prevent bilinear sampling at the of the crop rectangle we
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// may need to shrink it by 2 texels in each direction. Normally this
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// would just need to take 1/2 a texel off each end, but because the
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// chroma channels will likely be subsampled we need to chop off a whole
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// texel. This will cause artifacts if someone does nearest sampling
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// with 1:1 pixel:texel ratio, but it's impossible to simultaneously
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// accomodate the bilinear and nearest sampling uses.
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//
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// If nearest sampling turns out to be a desirable usage of these
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// textures then we could add the ability to switch a SurfaceTexture to
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// nearest-mode. Preferably, however, the image producers (video
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// decoder, camera, etc.) would simply not use a crop rectangle (or at
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// least not tell the framework about it) so that the GPU can do the
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// correct edge behavior.
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int xshrink = 0, yshrink = 0;
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if (mCurrentCrop.left > 0) {
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tx = float(mCurrentCrop.left + 1) / float(buf->getWidth());
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xshrink++;
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} else {
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tx = 0.0f;
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}
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if (mCurrentCrop.right < int32_t(buf->getWidth())) {
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xshrink++;
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}
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if (mCurrentCrop.bottom < int32_t(buf->getHeight())) {
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ty = (float(buf->getHeight() - mCurrentCrop.bottom) + 1.0f) /
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float(buf->getHeight());
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yshrink++;
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} else {
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ty = 0.0f;
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}
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if (mCurrentCrop.top > 0) {
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yshrink++;
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}
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sx = float(mCurrentCrop.width() - xshrink) / float(buf->getWidth());
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sy = float(mCurrentCrop.height() - yshrink) / float(buf->getHeight());
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} else {
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tx = 0.0f;
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ty = 0.0f;
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sx = 1.0f;
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sy = 1.0f;
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}
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float crop[16] = {
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sx, 0, 0, 0,
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0, sy, 0, 0,
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0, 0, 1, 0,
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tx, ty, 0, 1,
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};
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float mtxBeforeFlipV[16];
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mtxMul(mtxBeforeFlipV, crop, xform);
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// SurfaceFlinger expects the top of its window textures to be at a Y
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// coordinate of 0, so SurfaceTexture must behave the same way. We don't
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// want to expose this to applications, however, so we must add an
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// additional vertical flip to the transform after all the other transforms.
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mtxMul(mCurrentTransformMatrix, mtxFlipV, mtxBeforeFlipV);
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}
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nsecs_t SurfaceTexture::getTimestamp() {
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ST_LOGV("getTimestamp");
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Mutex::Autolock lock(mMutex);
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return mCurrentTimestamp;
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}
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void SurfaceTexture::setFrameAvailableListener(
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const sp<FrameAvailableListener>& listener) {
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ST_LOGV("setFrameAvailableListener");
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Mutex::Autolock lock(mMutex);
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BufferQueue::setFrameAvailableListener(listener);
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}
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EGLImageKHR SurfaceTexture::createImage(EGLDisplay dpy,
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const sp<GraphicBuffer>& graphicBuffer) {
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EGLClientBuffer cbuf = (EGLClientBuffer)graphicBuffer->getNativeBuffer();
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EGLint attrs[] = {
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EGL_IMAGE_PRESERVED_KHR, EGL_TRUE,
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EGL_NONE,
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};
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EGLImageKHR image = eglCreateImageKHR(dpy, EGL_NO_CONTEXT,
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EGL_NATIVE_BUFFER_ANDROID, cbuf, attrs);
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if (image == EGL_NO_IMAGE_KHR) {
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EGLint error = eglGetError();
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ST_LOGE("error creating EGLImage: %#x", error);
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}
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return image;
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}
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sp<GraphicBuffer> SurfaceTexture::getCurrentBuffer() const {
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Mutex::Autolock lock(mMutex);
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return mCurrentTextureBuf;
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}
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Rect SurfaceTexture::getCurrentCrop() const {
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Mutex::Autolock lock(mMutex);
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return mCurrentCrop;
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}
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uint32_t SurfaceTexture::getCurrentTransform() const {
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Mutex::Autolock lock(mMutex);
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return mCurrentTransform;
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}
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uint32_t SurfaceTexture::getCurrentScalingMode() const {
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Mutex::Autolock lock(mMutex);
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return mCurrentScalingMode;
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}
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bool SurfaceTexture::isSynchronousMode() const {
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Mutex::Autolock lock(mMutex);
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return BufferQueue::isSynchronousMode();
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}
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void SurfaceTexture::abandon() {
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Mutex::Autolock lock(mMutex);
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mAbandoned = true;
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mCurrentTextureBuf.clear();
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// destroy all egl buffers
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for (int i =0; i < NUM_BUFFER_SLOTS; i++) {
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mEGLSlots[i].mGraphicBuffer = 0;
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if (mEGLSlots[i].mEglImage != EGL_NO_IMAGE_KHR) {
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eglDestroyImageKHR(mEGLSlots[i].mEglDisplay,
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mEGLSlots[i].mEglImage);
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mEGLSlots[i].mEglImage = EGL_NO_IMAGE_KHR;
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mEGLSlots[i].mEglDisplay = EGL_NO_DISPLAY;
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}
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}
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// disconnect from the BufferQueue
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BufferQueue::consumerDisconnect();
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}
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void SurfaceTexture::setName(const String8& name) {
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Mutex::Autolock _l(mMutex);
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mName = name;
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BufferQueue::setConsumerName(name);
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}
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void SurfaceTexture::dump(String8& result) const
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{
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char buffer[1024];
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dump(result, "", buffer, 1024);
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}
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void SurfaceTexture::dump(String8& result, const char* prefix,
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char* buffer, size_t SIZE) const
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{
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Mutex::Autolock _l(mMutex);
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snprintf(buffer, SIZE, "%smTexName=%d\n", prefix, mTexName);
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result.append(buffer);
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snprintf(buffer, SIZE,
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"%snext : {crop=[%d,%d,%d,%d], transform=0x%02x, current=%d}\n"
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,prefix, mCurrentCrop.left,
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mCurrentCrop.top, mCurrentCrop.right, mCurrentCrop.bottom,
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mCurrentTransform, mCurrentTexture
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);
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result.append(buffer);
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BufferQueue::dump(result, prefix, buffer, SIZE);
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}
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static void mtxMul(float out[16], const float a[16], const float b[16]) {
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out[0] = a[0]*b[0] + a[4]*b[1] + a[8]*b[2] + a[12]*b[3];
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out[1] = a[1]*b[0] + a[5]*b[1] + a[9]*b[2] + a[13]*b[3];
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out[2] = a[2]*b[0] + a[6]*b[1] + a[10]*b[2] + a[14]*b[3];
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out[3] = a[3]*b[0] + a[7]*b[1] + a[11]*b[2] + a[15]*b[3];
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out[4] = a[0]*b[4] + a[4]*b[5] + a[8]*b[6] + a[12]*b[7];
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out[5] = a[1]*b[4] + a[5]*b[5] + a[9]*b[6] + a[13]*b[7];
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out[6] = a[2]*b[4] + a[6]*b[5] + a[10]*b[6] + a[14]*b[7];
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out[7] = a[3]*b[4] + a[7]*b[5] + a[11]*b[6] + a[15]*b[7];
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out[8] = a[0]*b[8] + a[4]*b[9] + a[8]*b[10] + a[12]*b[11];
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out[9] = a[1]*b[8] + a[5]*b[9] + a[9]*b[10] + a[13]*b[11];
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out[10] = a[2]*b[8] + a[6]*b[9] + a[10]*b[10] + a[14]*b[11];
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out[11] = a[3]*b[8] + a[7]*b[9] + a[11]*b[10] + a[15]*b[11];
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out[12] = a[0]*b[12] + a[4]*b[13] + a[8]*b[14] + a[12]*b[15];
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out[13] = a[1]*b[12] + a[5]*b[13] + a[9]*b[14] + a[13]*b[15];
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out[14] = a[2]*b[12] + a[6]*b[13] + a[10]*b[14] + a[14]*b[15];
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out[15] = a[3]*b[12] + a[7]*b[13] + a[11]*b[14] + a[15]*b[15];
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}
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}; // namespace android
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