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