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      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     //LOGD("%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         //LOGD("%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_MEDIA:
     98             case NATIVE_WINDOW_API_CAMERA:
     99                 // Camera preview and videos are rate-limited on the producer
    100                 // side.  If enabled for this build, we use async mode to always
    101                 // show the most recent frame at the cost of requiring an
    102                 // additional buffer.
    103 #ifndef NEVER_DEFAULT_TO_ASYNC_MODE
    104                 err = setSynchronousMode(false);
    105                 break;
    106 #endif
    107                 // fall through to set synchronous mode when not defaulting to
    108                 // async mode.
    109             deafult:
    110                 err = setSynchronousMode(true);
    111                 break;
    112         }
    113         if (err != NO_ERROR) {
    114             disconnect(api);
    115         }
    116     }
    117     return err;
    118 }
    119 
    120 // ---------------------------------------------------------------------------
    121 }; // namespace android
    122