VirtualDisplaySurface.cpp revision 7414965606f82ac2bcace5d3e2c8a4810517bf1e 
1/*
2 * Copyright 2013 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 "VirtualDisplaySurface.h"
18#include "HWComposer.h"
19
20// ---------------------------------------------------------------------------
21namespace android {
22// ---------------------------------------------------------------------------
23
24VirtualDisplaySurface::VirtualDisplaySurface(HWComposer& hwc, int disp,
25        const sp<IGraphicBufferProducer>& sink, const String8& name)
26:   mHwc(hwc),
27    mDisplayId(disp),
28    mSource(new BufferQueueInterposer(sink, name)),
29    mName(name)
30{}
31
32VirtualDisplaySurface::~VirtualDisplaySurface() {
33    if (mAcquiredBuffer != NULL) {
34        status_t result = mSource->releaseBuffer(Fence::NO_FENCE);
35        ALOGE_IF(result != NO_ERROR, "VirtualDisplaySurface \"%s\": "
36                "failed to release buffer: %d", mName.string(), result);
37    }
38}
39
40sp<IGraphicBufferProducer> VirtualDisplaySurface::getIGraphicBufferProducer() const {
41    return mSource;
42}
43
44status_t VirtualDisplaySurface::compositionComplete() {
45    return NO_ERROR;
46}
47
48status_t VirtualDisplaySurface::advanceFrame() {
49    Mutex::Autolock lock(mMutex);
50    status_t result = NO_ERROR;
51
52    if (mAcquiredBuffer != NULL) {
53        ALOGE("VirtualDisplaySurface \"%s\": "
54                "advanceFrame called twice without onFrameCommitted",
55                mName.string());
56        return INVALID_OPERATION;
57    }
58
59    sp<Fence> fence;
60    result = mSource->acquireBuffer(&mAcquiredBuffer, &fence);
61    if (result == BufferQueueInterposer::NO_BUFFER_AVAILABLE) {
62        result = mSource->pullEmptyBuffer();
63        if (result != NO_ERROR)
64            return result;
65        result = mSource->acquireBuffer(&mAcquiredBuffer, &fence);
66    }
67    if (result != NO_ERROR)
68        return result;
69
70    return mHwc.fbPost(mDisplayId, fence, mAcquiredBuffer);
71}
72
73void VirtualDisplaySurface::onFrameCommitted(int fenceFd) {
74    Mutex::Autolock lock(mMutex);
75    sp<Fence> fence(new Fence(fenceFd));
76    if (mAcquiredBuffer != NULL) {
77        status_t result = mSource->releaseBuffer(fence);
78        ALOGE_IF(result != NO_ERROR, "VirtualDisplaySurface \"%s\": "
79                "failed to release buffer: %d", mName.string(), result);
80        mAcquiredBuffer.clear();
81    }
82}
83
84void VirtualDisplaySurface::dump(String8& result) const {
85}
86
87// ---------------------------------------------------------------------------
88} // namespace android
89// ---------------------------------------------------------------------------
90