services/surfaceflinger/SurfaceTextureLayer.cpp

   1 /*
   2  * Copyright (C) 2011 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 #include <stdlib.h>
  18 #include <stdint.h>
  19 #include <sys/types.h>
  20
  21 #include <utils/Errors.h>
  22
  23 #include "Layer.h"
  24 #include "SurfaceTextureLayer.h"
  25
  26 namespace android {
  27 // ---------------------------------------------------------------------------
  28
  29
  30 SurfaceTextureLayer::SurfaceTextureLayer(GLuint tex, const sp<Layer>& layer)
  31     : SurfaceTexture(tex, true, GL_TEXTURE_EXTERNAL_OES, false), mLayer(layer) {
  32 }
  33
  34 SurfaceTextureLayer::~SurfaceTextureLayer() {
  35 }
  36
  37
  38 status_t SurfaceTextureLayer::setDefaultBufferSize(uint32_t w, uint32_t h)
  39 {
  40     //ALOGD("%s, w=%u, h=%u", __PRETTY_FUNCTION__, w, h);
  41     return SurfaceTexture::setDefaultBufferSize(w, h);
  42 }
  43
  44 status_t SurfaceTextureLayer::setDefaultBufferFormat(uint32_t format)
  45 {
  46     mDefaultFormat = format;
  47     return NO_ERROR;
  48 }
  49
  50 status_t SurfaceTextureLayer::setBufferCount(int bufferCount) {
  51     status_t res = SurfaceTexture::setBufferCount(bufferCount);
  52     return res;
  53 }
  54
  55 status_t SurfaceTextureLayer::queueBuffer(int buf, int64_t timestamp,
  56         uint32_t* outWidth, uint32_t* outHeight, uint32_t* outTransform) {
  57
  58     status_t res = SurfaceTexture::queueBuffer(buf, timestamp,
  59             outWidth, outHeight, outTransform);
  60     sp<Layer> layer(mLayer.promote());
  61     if (layer != NULL) {
  62         *outTransform = layer->getTransformHint();
  63     }
  64     return res;
  65 }
  66
  67 status_t SurfaceTextureLayer::dequeueBuffer(int *buf,
  68         uint32_t w, uint32_t h, uint32_t format, uint32_t usage) {
  69
  70     status_t res(NO_INIT);
  71     sp<Layer> layer(mLayer.promote());
  72     if (layer != NULL) {
  73         if (format == 0)
  74             format = mDefaultFormat;
  75         uint32_t effectiveUsage = layer->getEffectiveUsage(usage);
  76         //ALOGD("%s, w=%u, h=%u, format=%u, usage=%08x, effectiveUsage=%08x",
  77         //        __PRETTY_FUNCTION__, w, h, format, usage, effectiveUsage);
  78         res = SurfaceTexture::dequeueBuffer(buf, w, h, format, effectiveUsage);
  79     }
  80     return res;
  81 }
  82
  83 status_t SurfaceTextureLayer::connect(int api,
  84         uint32_t* outWidth, uint32_t* outHeight, uint32_t* outTransform) {
  85     status_t err = SurfaceTexture::connect(api,
  86             outWidth, outHeight, outTransform);
  87     if (err == NO_ERROR) {
  88         sp<Layer> layer(mLayer.promote());
  89         if (layer != NULL) {
  90             uint32_t orientation = layer->getOrientation();
  91             if (orientation & Transform::ROT_INVALID) {
  92                 orientation = 0;
  93             }
  94             *outTransform = orientation;
  95         }
  96         switch(api) {
  97             case NATIVE_WINDOW_API_CPU:
  98                 // SurfaceTextureClient supports only 2 buffers for CPU connections
  99                 this->setBufferCountServer(2);
 100                 break;
 101             case NATIVE_WINDOW_API_MEDIA:
 102             case NATIVE_WINDOW_API_CAMERA:
 103                 // Camera preview and videos are rate-limited on the producer
 104                 // side.  If enabled for this build, we use async mode to always
 105                 // show the most recent frame at the cost of requiring an
 106                 // additional buffer.
 107 #ifndef NEVER_DEFAULT_TO_ASYNC_MODE
 108                 err = setSynchronousMode(false);
 109                 break;
 110 #endif
 111                 // fall through to set synchronous mode when not defaulting to
 112                 // async mode.
 113             deafult:
 114                 err = setSynchronousMode(true);
 115                 break;
 116         }
 117         if (err != NO_ERROR) {
 118             disconnect(api);
 119         }
 120     }
 121     return err;
 122 }
 123
 124 // ---------------------------------------------------------------------------
 125 }; // namespace android