SurfaceUtils.cpp revision a092e5581926703ecfe296e64d3a8fe7d7c65984 
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, 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
121status_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
206error:
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