CpuConsumer.cpp revision a5b7513711555c8681eb9391cfafe30fb7d6dd3d 
1/*
2 * Copyright (C) 2012 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//#define LOG_NDEBUG 0
18#define LOG_TAG "CpuConsumer"
19#define ATRACE_TAG ATRACE_TAG_GRAPHICS
20
21#include <cutils/compiler.h>
22#include <utils/Log.h>
23#include <gui/CpuConsumer.h>
24
25#define CC_LOGV(x, ...) ALOGV("[%s] "x, mName.string(), ##__VA_ARGS__)
26#define CC_LOGD(x, ...) ALOGD("[%s] "x, mName.string(), ##__VA_ARGS__)
27#define CC_LOGI(x, ...) ALOGI("[%s] "x, mName.string(), ##__VA_ARGS__)
28#define CC_LOGW(x, ...) ALOGW("[%s] "x, mName.string(), ##__VA_ARGS__)
29#define CC_LOGE(x, ...) ALOGE("[%s] "x, mName.string(), ##__VA_ARGS__)
30
31namespace android {
32
33CpuConsumer::CpuConsumer(const sp<IGraphicBufferConsumer>& bq,
34        uint32_t maxLockedBuffers, bool controlledByApp) :
35    ConsumerBase(bq, controlledByApp),
36    mMaxLockedBuffers(maxLockedBuffers),
37    mCurrentLockedBuffers(0)
38{
39    // Create tracking entries for locked buffers
40    mAcquiredBuffers.insertAt(0, maxLockedBuffers);
41
42    mConsumer->setConsumerUsageBits(GRALLOC_USAGE_SW_READ_OFTEN);
43    mConsumer->setMaxAcquiredBufferCount(maxLockedBuffers);
44}
45
46CpuConsumer::~CpuConsumer() {
47    // ConsumerBase destructor does all the work.
48}
49
50
51
52void CpuConsumer::setName(const String8& name) {
53    Mutex::Autolock _l(mMutex);
54    mName = name;
55    mConsumer->setConsumerName(name);
56}
57
58status_t CpuConsumer::setDefaultBufferSize(uint32_t width, uint32_t height)
59{
60    Mutex::Autolock _l(mMutex);
61    return mConsumer->setDefaultBufferSize(width, height);
62}
63
64status_t CpuConsumer::setDefaultBufferFormat(uint32_t defaultFormat)
65{
66    Mutex::Autolock _l(mMutex);
67    return mConsumer->setDefaultBufferFormat(defaultFormat);
68}
69
70status_t CpuConsumer::lockNextBuffer(LockedBuffer *nativeBuffer) {
71    status_t err;
72
73    if (!nativeBuffer) return BAD_VALUE;
74    if (mCurrentLockedBuffers == mMaxLockedBuffers) {
75        CC_LOGW("Max buffers have been locked (%d), cannot lock anymore.",
76                mMaxLockedBuffers);
77        return NOT_ENOUGH_DATA;
78    }
79
80    BufferQueue::BufferItem b;
81
82    Mutex::Autolock _l(mMutex);
83
84    err = acquireBufferLocked(&b, 0);
85    if (err != OK) {
86        if (err == BufferQueue::NO_BUFFER_AVAILABLE) {
87            return BAD_VALUE;
88        } else {
89            CC_LOGE("Error acquiring buffer: %s (%d)", strerror(err), err);
90            return err;
91        }
92    }
93
94    int buf = b.mBuf;
95
96    if (b.mFence.get()) {
97        err = b.mFence->waitForever("CpuConsumer::lockNextBuffer");
98        if (err != OK) {
99            CC_LOGE("Failed to wait for fence of acquired buffer: %s (%d)",
100                    strerror(-err), err);
101            return err;
102        }
103    }
104
105    void *bufferPointer = NULL;
106    android_ycbcr ycbcr = android_ycbcr();
107
108    if (mSlots[buf].mGraphicBuffer->getPixelFormat() ==
109            HAL_PIXEL_FORMAT_YCbCr_420_888) {
110        err = mSlots[buf].mGraphicBuffer->lockYCbCr(
111            GraphicBuffer::USAGE_SW_READ_OFTEN,
112            b.mCrop,
113            &ycbcr);
114
115        if (err != OK) {
116            CC_LOGE("Unable to lock YCbCr buffer for CPU reading: %s (%d)",
117                    strerror(-err), err);
118            return err;
119        }
120        bufferPointer = ycbcr.y;
121    } else {
122        err = mSlots[buf].mGraphicBuffer->lock(
123            GraphicBuffer::USAGE_SW_READ_OFTEN,
124            b.mCrop,
125            &bufferPointer);
126
127        if (err != OK) {
128            CC_LOGE("Unable to lock buffer for CPU reading: %s (%d)",
129                    strerror(-err), err);
130            return err;
131        }
132    }
133
134    size_t lockedIdx = 0;
135    for (; lockedIdx < mMaxLockedBuffers; lockedIdx++) {
136        if (mAcquiredBuffers[lockedIdx].mSlot ==
137                BufferQueue::INVALID_BUFFER_SLOT) {
138            break;
139        }
140    }
141    assert(lockedIdx < mMaxLockedBuffers);
142
143    AcquiredBuffer &ab = mAcquiredBuffers.editItemAt(lockedIdx);
144    ab.mSlot = buf;
145    ab.mBufferPointer = bufferPointer;
146    ab.mGraphicBuffer = mSlots[buf].mGraphicBuffer;
147
148    nativeBuffer->data   =
149            reinterpret_cast<uint8_t*>(bufferPointer);
150    nativeBuffer->width  = mSlots[buf].mGraphicBuffer->getWidth();
151    nativeBuffer->height = mSlots[buf].mGraphicBuffer->getHeight();
152    nativeBuffer->format = mSlots[buf].mGraphicBuffer->getPixelFormat();
153    nativeBuffer->stride = (ycbcr.y != NULL) ?
154            ycbcr.ystride :
155            mSlots[buf].mGraphicBuffer->getStride();
156
157    nativeBuffer->crop        = b.mCrop;
158    nativeBuffer->transform   = b.mTransform;
159    nativeBuffer->scalingMode = b.mScalingMode;
160    nativeBuffer->timestamp   = b.mTimestamp;
161    nativeBuffer->frameNumber = b.mFrameNumber;
162
163    nativeBuffer->dataCb       = reinterpret_cast<uint8_t*>(ycbcr.cb);
164    nativeBuffer->dataCr       = reinterpret_cast<uint8_t*>(ycbcr.cr);
165    nativeBuffer->chromaStride = ycbcr.cstride;
166    nativeBuffer->chromaStep   = ycbcr.chroma_step;
167
168    mCurrentLockedBuffers++;
169
170    return OK;
171}
172
173status_t CpuConsumer::unlockBuffer(const LockedBuffer &nativeBuffer) {
174    Mutex::Autolock _l(mMutex);
175    size_t lockedIdx = 0;
176    status_t err;
177
178    void *bufPtr = reinterpret_cast<void *>(nativeBuffer.data);
179    for (; lockedIdx < mMaxLockedBuffers; lockedIdx++) {
180        if (bufPtr == mAcquiredBuffers[lockedIdx].mBufferPointer) break;
181    }
182    if (lockedIdx == mMaxLockedBuffers) {
183        CC_LOGE("%s: Can't find buffer to free", __FUNCTION__);
184        return BAD_VALUE;
185    }
186
187    return releaseAcquiredBufferLocked(lockedIdx);
188}
189
190status_t CpuConsumer::releaseAcquiredBufferLocked(int lockedIdx) {
191    status_t err;
192
193    err = mAcquiredBuffers[lockedIdx].mGraphicBuffer->unlock();
194    if (err != OK) {
195        CC_LOGE("%s: Unable to unlock graphic buffer %d", __FUNCTION__,
196                lockedIdx);
197        return err;
198    }
199    int buf = mAcquiredBuffers[lockedIdx].mSlot;
200
201    // release the buffer if it hasn't already been freed by the BufferQueue.
202    // This can happen, for example, when the producer of this buffer
203    // disconnected after this buffer was acquired.
204    if (CC_LIKELY(mAcquiredBuffers[lockedIdx].mGraphicBuffer ==
205            mSlots[buf].mGraphicBuffer)) {
206        releaseBufferLocked(
207                buf, mAcquiredBuffers[lockedIdx].mGraphicBuffer,
208                EGL_NO_DISPLAY, EGL_NO_SYNC_KHR);
209    }
210
211    AcquiredBuffer &ab = mAcquiredBuffers.editItemAt(lockedIdx);
212    ab.mSlot = BufferQueue::INVALID_BUFFER_SLOT;
213    ab.mBufferPointer = NULL;
214    ab.mGraphicBuffer.clear();
215
216    mCurrentLockedBuffers--;
217    return OK;
218}
219
220void CpuConsumer::freeBufferLocked(int slotIndex) {
221    ConsumerBase::freeBufferLocked(slotIndex);
222}
223
224} // namespace android
225