stagefright: move native window helpers into SurfaceUtils

Bug: 20885565
Change-Id: I2ed14be8a7cb08b1ed4ea65cb9286dc1384fe64a

1 files changed, 215 insertions, 0 deletions

diff --git a/media/libstagefright/SurfaceUtils.cpp b/media/libstagefright/SurfaceUtils.cpp
new file mode 100644
index 0000000..6b62e43
--- /dev/null
+++ b/media/libstagefright/SurfaceUtils.cpp
@@ -0,0 +1,215 @@
+/*
+ * Copyright 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "SurfaceUtils"
+#include <utils/Log.h>
+
+#include <media/stagefright/SurfaceUtils.h>
+
+#include <gui/Surface.h>
+
+namespace android {
+
+status_t setNativeWindowSizeFormatAndUsage(
+        ANativeWindow *nativeWindow /* nonnull */,
+        int width, int height, int format, int rotation, int usage) {
+    status_t err = native_window_set_buffers_dimensions(nativeWindow, width, height);
+    if (err != NO_ERROR) {
+        ALOGE("native_window_set_buffers_dimensions failed: %s (%d)", strerror(-err), -err);
+        return err;
+    }
+
+    err = native_window_set_buffers_format(nativeWindow, format);
+    if (err != NO_ERROR) {
+        ALOGE("native_window_set_buffers_format failed: %s (%d)", strerror(-err), -err);
+        return err;
+    }
+
+    int transform = 0;
+    if ((rotation % 90) == 0) {
+        switch ((rotation / 90) & 3) {
+            case 1:  transform = HAL_TRANSFORM_ROT_90;  break;
+            case 2:  transform = HAL_TRANSFORM_ROT_180; break;
+            case 3:  transform = HAL_TRANSFORM_ROT_270; break;
+            default: transform = 0;                     break;
+        }
+    }
+
+    err = native_window_set_buffers_transform(nativeWindow, transform);
+    if (err != NO_ERROR) {
+        ALOGE("native_window_set_buffers_transform failed: %s (%d)", strerror(-err), -err);
+        return err;
+    }
+
+    // Make sure to check whether either Stagefright or the video decoder
+    // requested protected buffers.
+    if (usage & GRALLOC_USAGE_PROTECTED) {
+        // Verify that the ANativeWindow sends images directly to
+        // SurfaceFlinger.
+        int queuesToNativeWindow = 0;
+        err = nativeWindow->query(
+                nativeWindow, NATIVE_WINDOW_QUEUES_TO_WINDOW_COMPOSER, &queuesToNativeWindow);
+        if (err != NO_ERROR) {
+            ALOGE("error authenticating native window: %s (%d)", strerror(-err), -err);
+            return err;
+        }
+        if (queuesToNativeWindow != 1) {
+            ALOGE("native window could not be authenticated");
+            return PERMISSION_DENIED;
+        }
+    }
+
+    int consumerUsage = 0;
+    err = nativeWindow->query(nativeWindow, NATIVE_WINDOW_CONSUMER_USAGE_BITS, &consumerUsage);
+    if (err != NO_ERROR) {
+        ALOGW("failed to get consumer usage bits. ignoring");
+        err = NO_ERROR;
+    }
+
+    int finalUsage = usage | consumerUsage;
+    ALOGV("gralloc usage: %#x(producer) + %#x(consumer) = %#x", usage, consumerUsage, finalUsage);
+    err = native_window_set_usage(nativeWindow, finalUsage);
+    if (err != NO_ERROR) {
+        ALOGE("native_window_set_usage failed: %s (%d)", strerror(-err), -err);
+        return err;
+    }
+
+    err = native_window_set_scaling_mode(
+            nativeWindow, NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW);
+    if (err != NO_ERROR) {
+        ALOGE("native_window_set_scaling_mode failed: %s (%d)", strerror(-err), -err);
+        return err;
+    }
+
+    ALOGD("set up nativeWindow %p for %dx%d, color %#x, rotation %d, usage %#x",
+            nativeWindow, width, height, format, rotation, finalUsage);
+    return NO_ERROR;
+}
+
+status_t pushBlankBuffersToNativeWindow(ANativeWindow *nativeWindow /* nonnull */) {
+    status_t err = NO_ERROR;
+    ANativeWindowBuffer* anb = NULL;
+    int numBufs = 0;
+    int minUndequeuedBufs = 0;
+
+    // We need to reconnect to the ANativeWindow as a CPU client to ensure that
+    // no frames get dropped by SurfaceFlinger assuming that these are video
+    // frames.
+    err = native_window_api_disconnect(nativeWindow, NATIVE_WINDOW_API_MEDIA);
+    if (err != NO_ERROR) {
+        ALOGE("error pushing blank frames: api_disconnect failed: %s (%d)", strerror(-err), -err);
+        return err;
+    }
+
+    err = native_window_api_connect(nativeWindow, NATIVE_WINDOW_API_CPU);
+    if (err != NO_ERROR) {
+        ALOGE("error pushing blank frames: api_connect failed: %s (%d)", strerror(-err), -err);
+        (void)native_window_api_connect(nativeWindow, NATIVE_WINDOW_API_MEDIA);
+        return err;
+    }
+
+    err = setNativeWindowSizeFormatAndUsage(
+            nativeWindow, 1, 1, HAL_PIXEL_FORMAT_RGBX_8888, 0, GRALLOC_USAGE_SW_WRITE_OFTEN);
+    if (err != NO_ERROR) {
+        goto error;
+    }
+
+    static_cast<Surface*>(nativeWindow)->getIGraphicBufferProducer()->allowAllocation(true);
+
+    err = nativeWindow->query(nativeWindow,
+            NATIVE_WINDOW_MIN_UNDEQUEUED_BUFFERS, &minUndequeuedBufs);
+    if (err != NO_ERROR) {
+        ALOGE("error pushing blank frames: MIN_UNDEQUEUED_BUFFERS query "
+                "failed: %s (%d)", strerror(-err), -err);
+        goto error;
+    }
+
+    numBufs = minUndequeuedBufs + 1;
+    err = native_window_set_buffer_count(nativeWindow, numBufs);
+    if (err != NO_ERROR) {
+        ALOGE("error pushing blank frames: set_buffer_count failed: %s (%d)", strerror(-err), -err);
+        goto error;
+    }
+
+    // We push numBufs + 1 buffers to ensure that we've drawn into the same
+    // buffer twice.  This should guarantee that the buffer has been displayed
+    // on the screen and then been replaced, so an previous video frames are
+    // guaranteed NOT to be currently displayed.
+    for (int i = 0; i < numBufs + 1; i++) {
+        err = native_window_dequeue_buffer_and_wait(nativeWindow, &anb);
+        if (err != NO_ERROR) {
+            ALOGE("error pushing blank frames: dequeueBuffer failed: %s (%d)",
+                    strerror(-err), -err);
+            break;
+        }
+
+        sp<GraphicBuffer> buf(new GraphicBuffer(anb, false));
+
+        // Fill the buffer with the a 1x1 checkerboard pattern ;)
+        uint32_t *img = NULL;
+        err = buf->lock(GRALLOC_USAGE_SW_WRITE_OFTEN, (void**)(&img));
+        if (err != NO_ERROR) {
+            ALOGE("error pushing blank frames: lock failed: %s (%d)", strerror(-err), -err);
+            break;
+        }
+
+        *img = 0;
+
+        err = buf->unlock();
+        if (err != NO_ERROR) {
+            ALOGE("error pushing blank frames: unlock failed: %s (%d)", strerror(-err), -err);
+            break;
+        }
+
+        err = nativeWindow->queueBuffer(nativeWindow, buf->getNativeBuffer(), -1);
+        if (err != NO_ERROR) {
+            ALOGE("error pushing blank frames: queueBuffer failed: %s (%d)", strerror(-err), -err);
+            break;
+        }
+
+        anb = NULL;
+    }
+
+error:
+
+    if (anb != NULL) {
+        nativeWindow->cancelBuffer(nativeWindow, anb, -1);
+        anb = NULL;
+    }
+
+    // Clean up after success or error.
+    status_t err2 = native_window_api_disconnect(nativeWindow, NATIVE_WINDOW_API_CPU);
+    if (err2 != NO_ERROR) {
+        ALOGE("error pushing blank frames: api_disconnect failed: %s (%d)", strerror(-err2), -err2);
+        if (err == NO_ERROR) {
+            err = err2;
+        }
+    }
+
+    err2 = native_window_api_connect(nativeWindow, NATIVE_WINDOW_API_MEDIA);
+    if (err2 != NO_ERROR) {
+        ALOGE("error pushing blank frames: api_connect failed: %s (%d)", strerror(-err), -err);
+        if (err == NO_ERROR) {
+            err = err2;
+        }
+    }
+
+    return err;
+}
+
+}  // namespace android
+