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
25 namespace android {
26
setNativeWindowSizeFormatAndUsage(ANativeWindow * nativeWindow,int width,int height,int format,int rotation,int usage,bool reconnect)27 status_t setNativeWindowSizeFormatAndUsage(
28 ANativeWindow *nativeWindow /* nonnull */,
29 int width, int height, int format, int rotation, int usage, bool reconnect) {
30 status_t err = NO_ERROR;
31
32 // In some cases we need to reconnect so that we can dequeue all buffers
33 if (reconnect) {
34 err = native_window_api_disconnect(nativeWindow, NATIVE_WINDOW_API_MEDIA);
35 if (err != NO_ERROR) {
36 ALOGE("native_window_api_disconnect failed: %s (%d)", strerror(-err), -err);
37 return err;
38 }
39
40 err = native_window_api_connect(nativeWindow, NATIVE_WINDOW_API_MEDIA);
41 if (err != NO_ERROR) {
42 ALOGE("native_window_api_connect failed: %s (%d)", strerror(-err), -err);
43 return err;
44 }
45 }
46
47 err = native_window_set_buffers_dimensions(nativeWindow, width, height);
48 if (err != NO_ERROR) {
49 ALOGE("native_window_set_buffers_dimensions failed: %s (%d)", strerror(-err), -err);
50 return err;
51 }
52
53 err = native_window_set_buffers_format(nativeWindow, format);
54 if (err != NO_ERROR) {
55 ALOGE("native_window_set_buffers_format failed: %s (%d)", strerror(-err), -err);
56 return err;
57 }
58
59 int transform = 0;
60 if ((rotation % 90) == 0) {
61 switch ((rotation / 90) & 3) {
62 case 1: transform = HAL_TRANSFORM_ROT_90; break;
63 case 2: transform = HAL_TRANSFORM_ROT_180; break;
64 case 3: transform = HAL_TRANSFORM_ROT_270; break;
65 default: transform = 0; break;
66 }
67 }
68
69 err = native_window_set_buffers_transform(nativeWindow, transform);
70 if (err != NO_ERROR) {
71 ALOGE("native_window_set_buffers_transform failed: %s (%d)", strerror(-err), -err);
72 return err;
73 }
74
75 int consumerUsage = 0;
76 err = nativeWindow->query(nativeWindow, NATIVE_WINDOW_CONSUMER_USAGE_BITS, &consumerUsage);
77 if (err != NO_ERROR) {
78 ALOGW("failed to get consumer usage bits. ignoring");
79 err = NO_ERROR;
80 }
81
82 // Make sure to check whether either Stagefright or the video decoder
83 // requested protected buffers.
84 if (usage & GRALLOC_USAGE_PROTECTED) {
85 // Check if the ANativeWindow sends images directly to SurfaceFlinger.
86 int queuesToNativeWindow = 0;
87 err = nativeWindow->query(
88 nativeWindow, NATIVE_WINDOW_QUEUES_TO_WINDOW_COMPOSER, &queuesToNativeWindow);
89 if (err != NO_ERROR) {
90 ALOGE("error authenticating native window: %s (%d)", strerror(-err), -err);
91 return err;
92 }
93
94 // Check if the ANativeWindow uses hardware protected buffers.
95 if (queuesToNativeWindow != 1 && !(consumerUsage & GRALLOC_USAGE_PROTECTED)) {
96 ALOGE("native window could not be authenticated");
97 return PERMISSION_DENIED;
98 }
99 }
100
101 int finalUsage = usage | consumerUsage;
102 ALOGV("gralloc usage: %#x(producer) + %#x(consumer) = %#x", usage, consumerUsage, finalUsage);
103 err = native_window_set_usage(nativeWindow, finalUsage);
104 if (err != NO_ERROR) {
105 ALOGE("native_window_set_usage failed: %s (%d)", strerror(-err), -err);
106 return err;
107 }
108
109 err = native_window_set_scaling_mode(
110 nativeWindow, NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW);
111 if (err != NO_ERROR) {
112 ALOGE("native_window_set_scaling_mode failed: %s (%d)", strerror(-err), -err);
113 return err;
114 }
115
116 ALOGD("set up nativeWindow %p for %dx%d, color %#x, rotation %d, usage %#x",
117 nativeWindow, width, height, format, rotation, finalUsage);
118 return NO_ERROR;
119 }
120
pushBlankBuffersToNativeWindow(ANativeWindow * nativeWindow)121 status_t pushBlankBuffersToNativeWindow(ANativeWindow *nativeWindow /* nonnull */) {
122 status_t err = NO_ERROR;
123 ANativeWindowBuffer* anb = NULL;
124 int numBufs = 0;
125 int minUndequeuedBufs = 0;
126
127 // We need to reconnect to the ANativeWindow as a CPU client to ensure that
128 // no frames get dropped by SurfaceFlinger assuming that these are video
129 // frames.
130 err = native_window_api_disconnect(nativeWindow, NATIVE_WINDOW_API_MEDIA);
131 if (err != NO_ERROR) {
132 ALOGE("error pushing blank frames: api_disconnect failed: %s (%d)", strerror(-err), -err);
133 return err;
134 }
135
136 err = native_window_api_connect(nativeWindow, NATIVE_WINDOW_API_CPU);
137 if (err != NO_ERROR) {
138 ALOGE("error pushing blank frames: api_connect failed: %s (%d)", strerror(-err), -err);
139 (void)native_window_api_connect(nativeWindow, NATIVE_WINDOW_API_MEDIA);
140 return err;
141 }
142
143 err = setNativeWindowSizeFormatAndUsage(
144 nativeWindow, 1, 1, HAL_PIXEL_FORMAT_RGBX_8888, 0, GRALLOC_USAGE_SW_WRITE_OFTEN,
145 false /* reconnect */);
146 if (err != NO_ERROR) {
147 goto error;
148 }
149
150 static_cast<Surface*>(nativeWindow)->getIGraphicBufferProducer()->allowAllocation(true);
151
152 err = nativeWindow->query(nativeWindow,
153 NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS, &minUndequeuedBufs);
154 if (err != NO_ERROR) {
155 ALOGE("error pushing blank frames: MIN_UNDEQUEUED_BUFFERS query "
156 "failed: %s (%d)", strerror(-err), -err);
157 goto error;
158 }
159
160 numBufs = minUndequeuedBufs + 1;
161 err = native_window_set_buffer_count(nativeWindow, numBufs);
162 if (err != NO_ERROR) {
163 ALOGE("error pushing blank frames: set_buffer_count failed: %s (%d)", strerror(-err), -err);
164 goto error;
165 }
166
167 // We push numBufs + 1 buffers to ensure that we've drawn into the same
168 // buffer twice. This should guarantee that the buffer has been displayed
169 // on the screen and then been replaced, so an previous video frames are
170 // guaranteed NOT to be currently displayed.
171 for (int i = 0; i < numBufs + 1; i++) {
172 err = native_window_dequeue_buffer_and_wait(nativeWindow, &anb);
173 if (err != NO_ERROR) {
174 ALOGE("error pushing blank frames: dequeueBuffer failed: %s (%d)",
175 strerror(-err), -err);
176 break;
177 }
178
179 sp<GraphicBuffer> buf(new GraphicBuffer(anb, false));
180
181 // Fill the buffer with the a 1x1 checkerboard pattern ;)
182 uint32_t *img = NULL;
183 err = buf->lock(GRALLOC_USAGE_SW_WRITE_OFTEN, (void**)(&img));
184 if (err != NO_ERROR) {
185 ALOGE("error pushing blank frames: lock failed: %s (%d)", strerror(-err), -err);
186 break;
187 }
188
189 *img = 0;
190
191 err = buf->unlock();
192 if (err != NO_ERROR) {
193 ALOGE("error pushing blank frames: unlock failed: %s (%d)", strerror(-err), -err);
194 break;
195 }
196
197 err = nativeWindow->queueBuffer(nativeWindow, buf->getNativeBuffer(), -1);
198 if (err != NO_ERROR) {
199 ALOGE("error pushing blank frames: queueBuffer failed: %s (%d)", strerror(-err), -err);
200 break;
201 }
202
203 anb = NULL;
204 }
205
206 error:
207
208 if (anb != NULL) {
209 nativeWindow->cancelBuffer(nativeWindow, anb, -1);
210 anb = NULL;
211 }
212
213 // Clean up after success or error.
214 status_t err2 = native_window_api_disconnect(nativeWindow, NATIVE_WINDOW_API_CPU);
215 if (err2 != NO_ERROR) {
216 ALOGE("error pushing blank frames: api_disconnect failed: %s (%d)", strerror(-err2), -err2);
217 if (err == NO_ERROR) {
218 err = err2;
219 }
220 }
221
222 err2 = native_window_api_connect(nativeWindow, NATIVE_WINDOW_API_MEDIA);
223 if (err2 != NO_ERROR) {
224 ALOGE("error pushing blank frames: api_connect failed: %s (%d)", strerror(-err), -err);
225 if (err == NO_ERROR) {
226 err = err2;
227 }
228 }
229
230 return err;
231 }
232
233 } // namespace android
234
235