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 "SurfaceFlinger.h"
24#include "SurfaceTextureLayer.h"
25
26namespace android {
27// ---------------------------------------------------------------------------
28
29
30SurfaceTextureLayer::SurfaceTextureLayer(const sp<SurfaceFlinger>& flinger)
31    : BufferQueue(true), flinger(flinger) {
32}
33
34SurfaceTextureLayer::~SurfaceTextureLayer() {
35    // remove ourselves from SurfaceFlinger's list. We do this asynchronously
36    // because we don't know where this dtor is called from, it could be
37    // called with the mStateLock held, leading to a dead-lock (it actually
38    // happens).
39    class MessageCleanUpList : public MessageBase {
40        sp<SurfaceFlinger> flinger;
41        wp<IBinder> gbp;
42    public:
43        MessageCleanUpList(const sp<SurfaceFlinger>& flinger, const wp<IBinder>& gbp)
44            : flinger(flinger), gbp(gbp) { }
45        virtual bool handler() {
46            Mutex::Autolock _l(flinger->mStateLock);
47            flinger->mGraphicBufferProducerList.remove(gbp);
48            return true;
49        }
50    };
51    flinger->postMessageAsync( new MessageCleanUpList(flinger, this) );
52}
53
54status_t SurfaceTextureLayer::connect(int api, QueueBufferOutput* output) {
55    status_t err = BufferQueue::connect(api, output);
56    if (err == NO_ERROR) {
57        switch(api) {
58            case NATIVE_WINDOW_API_MEDIA:
59            case NATIVE_WINDOW_API_CAMERA:
60                // Camera preview and videos are rate-limited on the producer
61                // side.  If enabled for this build, we use async mode to always
62                // show the most recent frame at the cost of requiring an
63                // additional buffer.
64#ifndef NEVER_DEFAULT_TO_ASYNC_MODE
65                err = setSynchronousMode(false);
66                break;
67#endif
68                // fall through to set synchronous mode when not defaulting to
69                // async mode.
70            default:
71                err = setSynchronousMode(true);
72                break;
73        }
74        if (err != NO_ERROR) {
75            disconnect(api);
76        }
77    }
78    return err;
79}
80
81// ---------------------------------------------------------------------------
82}; // namespace android
83