SurfaceUtils.cpp revision 9193bcd60728bac0d5c2059ed2dc878231509c3a
1/* 2 * Copyright 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17//#define LOG_NDEBUG 0 18#define LOG_TAG "SurfaceUtils" 19#include <utils/Log.h> 20 21#include <media/stagefright/SurfaceUtils.h> 22 23#include <gui/Surface.h> 24 25namespace android { 26 27status_t setNativeWindowSizeFormatAndUsage( 28 ANativeWindow *nativeWindow /* nonnull */, 29 int width, int height, int format, int rotation, int usage) { 30 status_t err = native_window_set_buffers_dimensions(nativeWindow, width, height); 31 if (err != NO_ERROR) { 32 ALOGE("native_window_set_buffers_dimensions failed: %s (%d)", strerror(-err), -err); 33 return err; 34 } 35 36 err = native_window_set_buffers_format(nativeWindow, format); 37 if (err != NO_ERROR) { 38 ALOGE("native_window_set_buffers_format failed: %s (%d)", strerror(-err), -err); 39 return err; 40 } 41 42 int transform = 0; 43 if ((rotation % 90) == 0) { 44 switch ((rotation / 90) & 3) { 45 case 1: transform = HAL_TRANSFORM_ROT_90; break; 46 case 2: transform = HAL_TRANSFORM_ROT_180; break; 47 case 3: transform = HAL_TRANSFORM_ROT_270; break; 48 default: transform = 0; break; 49 } 50 } 51 52 err = native_window_set_buffers_transform(nativeWindow, transform); 53 if (err != NO_ERROR) { 54 ALOGE("native_window_set_buffers_transform failed: %s (%d)", strerror(-err), -err); 55 return err; 56 } 57 58 int consumerUsage = 0; 59 err = nativeWindow->query(nativeWindow, NATIVE_WINDOW_CONSUMER_USAGE_BITS, &consumerUsage); 60 if (err != NO_ERROR) { 61 ALOGW("failed to get consumer usage bits. ignoring"); 62 err = NO_ERROR; 63 } 64 65 // Make sure to check whether either Stagefright or the video decoder 66 // requested protected buffers. 67 if (usage & GRALLOC_USAGE_PROTECTED) { 68 // Check if the ANativeWindow sends images directly to SurfaceFlinger. 69 int queuesToNativeWindow = 0; 70 err = nativeWindow->query( 71 nativeWindow, NATIVE_WINDOW_QUEUES_TO_WINDOW_COMPOSER, &queuesToNativeWindow); 72 if (err != NO_ERROR) { 73 ALOGE("error authenticating native window: %s (%d)", strerror(-err), -err); 74 return err; 75 } 76 77 // Check if the ANativeWindow uses hardware protected buffers. 78 if (queuesToNativeWindow != 1 && !(consumerUsage & GRALLOC_USAGE_PROTECTED)) { 79 ALOGE("native window could not be authenticated"); 80 return PERMISSION_DENIED; 81 } 82 } 83 84 int finalUsage = usage | consumerUsage; 85 ALOGV("gralloc usage: %#x(producer) + %#x(consumer) = %#x", usage, consumerUsage, finalUsage); 86 err = native_window_set_usage(nativeWindow, finalUsage); 87 if (err != NO_ERROR) { 88 ALOGE("native_window_set_usage failed: %s (%d)", strerror(-err), -err); 89 return err; 90 } 91 92 err = native_window_set_scaling_mode( 93 nativeWindow, NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW); 94 if (err != NO_ERROR) { 95 ALOGE("native_window_set_scaling_mode failed: %s (%d)", strerror(-err), -err); 96 return err; 97 } 98 99 ALOGD("set up nativeWindow %p for %dx%d, color %#x, rotation %d, usage %#x", 100 nativeWindow, width, height, format, rotation, finalUsage); 101 return NO_ERROR; 102} 103 104status_t pushBlankBuffersToNativeWindow(ANativeWindow *nativeWindow /* nonnull */) { 105 status_t err = NO_ERROR; 106 ANativeWindowBuffer* anb = NULL; 107 int numBufs = 0; 108 int minUndequeuedBufs = 0; 109 110 // We need to reconnect to the ANativeWindow as a CPU client to ensure that 111 // no frames get dropped by SurfaceFlinger assuming that these are video 112 // frames. 113 err = native_window_api_disconnect(nativeWindow, NATIVE_WINDOW_API_MEDIA); 114 if (err != NO_ERROR) { 115 ALOGE("error pushing blank frames: api_disconnect failed: %s (%d)", strerror(-err), -err); 116 return err; 117 } 118 119 err = native_window_api_connect(nativeWindow, NATIVE_WINDOW_API_CPU); 120 if (err != NO_ERROR) { 121 ALOGE("error pushing blank frames: api_connect failed: %s (%d)", strerror(-err), -err); 122 (void)native_window_api_connect(nativeWindow, NATIVE_WINDOW_API_MEDIA); 123 return err; 124 } 125 126 err = setNativeWindowSizeFormatAndUsage( 127 nativeWindow, 1, 1, HAL_PIXEL_FORMAT_RGBX_8888, 0, GRALLOC_USAGE_SW_WRITE_OFTEN); 128 if (err != NO_ERROR) { 129 goto error; 130 } 131 132 static_cast<Surface*>(nativeWindow)->getIGraphicBufferProducer()->allowAllocation(true); 133 134 err = nativeWindow->query(nativeWindow, 135 NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS, &minUndequeuedBufs); 136 if (err != NO_ERROR) { 137 ALOGE("error pushing blank frames: MIN_UNDEQUEUED_BUFFERS query " 138 "failed: %s (%d)", strerror(-err), -err); 139 goto error; 140 } 141 142 numBufs = minUndequeuedBufs + 1; 143 err = native_window_set_buffer_count(nativeWindow, numBufs); 144 if (err != NO_ERROR) { 145 ALOGE("error pushing blank frames: set_buffer_count failed: %s (%d)", strerror(-err), -err); 146 goto error; 147 } 148 149 // We push numBufs + 1 buffers to ensure that we've drawn into the same 150 // buffer twice. This should guarantee that the buffer has been displayed 151 // on the screen and then been replaced, so an previous video frames are 152 // guaranteed NOT to be currently displayed. 153 for (int i = 0; i < numBufs + 1; i++) { 154 err = native_window_dequeue_buffer_and_wait(nativeWindow, &anb); 155 if (err != NO_ERROR) { 156 ALOGE("error pushing blank frames: dequeueBuffer failed: %s (%d)", 157 strerror(-err), -err); 158 break; 159 } 160 161 sp<GraphicBuffer> buf(new GraphicBuffer(anb, false)); 162 163 // Fill the buffer with the a 1x1 checkerboard pattern ;) 164 uint32_t *img = NULL; 165 err = buf->lock(GRALLOC_USAGE_SW_WRITE_OFTEN, (void**)(&img)); 166 if (err != NO_ERROR) { 167 ALOGE("error pushing blank frames: lock failed: %s (%d)", strerror(-err), -err); 168 break; 169 } 170 171 if (img == NULL) { 172 ALOGE("error pushing blank frames: lock returned NULL buffer"); 173 break; 174 } 175 *img = 0; 176 177 err = buf->unlock(); 178 if (err != NO_ERROR) { 179 ALOGE("error pushing blank frames: unlock failed: %s (%d)", strerror(-err), -err); 180 break; 181 } 182 183 err = nativeWindow->queueBuffer(nativeWindow, buf->getNativeBuffer(), -1); 184 if (err != NO_ERROR) { 185 ALOGE("error pushing blank frames: queueBuffer failed: %s (%d)", strerror(-err), -err); 186 break; 187 } 188 189 anb = NULL; 190 } 191 192error: 193 194 if (anb != NULL) { 195 nativeWindow->cancelBuffer(nativeWindow, anb, -1); 196 anb = NULL; 197 } 198 199 // Clean up after success or error. 200 status_t err2 = native_window_api_disconnect(nativeWindow, NATIVE_WINDOW_API_CPU); 201 if (err2 != NO_ERROR) { 202 ALOGE("error pushing blank frames: api_disconnect failed: %s (%d)", strerror(-err2), -err2); 203 if (err == NO_ERROR) { 204 err = err2; 205 } 206 } 207 208 err2 = native_window_api_connect(nativeWindow, NATIVE_WINDOW_API_MEDIA); 209 if (err2 != NO_ERROR) { 210 ALOGE("error pushing blank frames: api_connect failed: %s (%d)", strerror(-err), -err); 211 if (err == NO_ERROR) { 212 err = err2; 213 } 214 } 215 216 return err; 217} 218 219} // namespace android 220 221