CpuConsumer.cpp revision b4b63704c02319765625de360a140ef8a59ab43b 
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(uint32_t maxLockedBuffers, bool synchronousMode) :
34    ConsumerBase(new BufferQueue(true) ),
35    mMaxLockedBuffers(maxLockedBuffers),
36    mCurrentLockedBuffers(0)
37{
38    // Create tracking entries for locked buffers
39    mAcquiredBuffers.insertAt(0, maxLockedBuffers);
40
41    mBufferQueue->setSynchronousMode(synchronousMode);
42    mBufferQueue->setConsumerUsageBits(GRALLOC_USAGE_SW_READ_OFTEN);
43    mBufferQueue->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    mBufferQueue->setConsumerName(name);
56}
57
58status_t CpuConsumer::setDefaultBufferSize(uint32_t width, uint32_t height)
59{
60    Mutex::Autolock _l(mMutex);
61    return mBufferQueue->setDefaultBufferSize(width, height);
62}
63
64status_t CpuConsumer::setDefaultBufferFormat(uint32_t defaultFormat)
65{
66    Mutex::Autolock _l(mMutex);
67    return mBufferQueue->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        return INVALID_OPERATION;
76    }
77
78    BufferQueue::BufferItem b;
79
80    Mutex::Autolock _l(mMutex);
81
82    err = acquireBufferLocked(&b);
83    if (err != OK) {
84        if (err == BufferQueue::NO_BUFFER_AVAILABLE) {
85            return BAD_VALUE;
86        } else {
87            CC_LOGE("Error acquiring buffer: %s (%d)", strerror(err), err);
88            return err;
89        }
90    }
91
92    int buf = b.mBuf;
93
94    if (b.mFence.get()) {
95        err = b.mFence->waitForever("CpuConsumer::lockNextBuffer");
96        if (err != OK) {
97            CC_LOGE("Failed to wait for fence of acquired buffer: %s (%d)",
98                    strerror(-err), err);
99            return err;
100        }
101    }
102
103    void *bufferPointer = NULL;
104    android_ycbcr ycbcr = android_ycbcr();
105
106    if (mSlots[buf].mGraphicBuffer->getPixelFormat() ==
107            HAL_PIXEL_FORMAT_YCbCr_420_888) {
108        err = mSlots[buf].mGraphicBuffer->lockYCbCr(
109            GraphicBuffer::USAGE_SW_READ_OFTEN,
110            b.mCrop,
111            &ycbcr);
112
113        if (err != OK) {
114            CC_LOGE("Unable to lock YCbCr buffer for CPU reading: %s (%d)",
115                    strerror(-err), err);
116            return err;
117        }
118        bufferPointer = ycbcr.y;
119    } else {
120        err = mSlots[buf].mGraphicBuffer->lock(
121            GraphicBuffer::USAGE_SW_READ_OFTEN,
122            b.mCrop,
123            &bufferPointer);
124
125        if (err != OK) {
126            CC_LOGE("Unable to lock buffer for CPU reading: %s (%d)",
127                    strerror(-err), err);
128            return err;
129        }
130    }
131
132    size_t lockedIdx = 0;
133    for (; lockedIdx < mMaxLockedBuffers; lockedIdx++) {
134        if (mAcquiredBuffers[lockedIdx].mSlot ==
135                BufferQueue::INVALID_BUFFER_SLOT) {
136            break;
137        }
138    }
139    assert(lockedIdx < mMaxLockedBuffers);
140
141    AcquiredBuffer &ab = mAcquiredBuffers.editItemAt(lockedIdx);
142    ab.mSlot = buf;
143    ab.mBufferPointer = bufferPointer;
144    ab.mGraphicBuffer = mSlots[buf].mGraphicBuffer;
145
146    nativeBuffer->data   =
147            reinterpret_cast<uint8_t*>(bufferPointer);
148    nativeBuffer->width  = mSlots[buf].mGraphicBuffer->getWidth();
149    nativeBuffer->height = mSlots[buf].mGraphicBuffer->getHeight();
150    nativeBuffer->format = mSlots[buf].mGraphicBuffer->getPixelFormat();
151    nativeBuffer->stride = (ycbcr.y != NULL) ?
152            ycbcr.ystride :
153            mSlots[buf].mGraphicBuffer->getStride();
154
155    nativeBuffer->crop        = b.mCrop;
156    nativeBuffer->transform   = b.mTransform;
157    nativeBuffer->scalingMode = b.mScalingMode;
158    nativeBuffer->timestamp   = b.mTimestamp;
159    nativeBuffer->frameNumber = b.mFrameNumber;
160
161    nativeBuffer->dataCb       = reinterpret_cast<uint8_t*>(ycbcr.cb);
162    nativeBuffer->dataCr       = reinterpret_cast<uint8_t*>(ycbcr.cr);
163    nativeBuffer->chromaStride = ycbcr.cstride;
164    nativeBuffer->chromaStep   = ycbcr.chroma_step;
165
166    mCurrentLockedBuffers++;
167
168    return OK;
169}
170
171status_t CpuConsumer::unlockBuffer(const LockedBuffer &nativeBuffer) {
172    Mutex::Autolock _l(mMutex);
173    size_t lockedIdx = 0;
174    status_t err;
175
176    void *bufPtr = reinterpret_cast<void *>(nativeBuffer.data);
177    for (; lockedIdx < mMaxLockedBuffers; lockedIdx++) {
178        if (bufPtr == mAcquiredBuffers[lockedIdx].mBufferPointer) break;
179    }
180    if (lockedIdx == mMaxLockedBuffers) {
181        CC_LOGE("%s: Can't find buffer to free", __FUNCTION__);
182        return BAD_VALUE;
183    }
184
185    return releaseAcquiredBufferLocked(lockedIdx);
186}
187
188status_t CpuConsumer::releaseAcquiredBufferLocked(int lockedIdx) {
189    status_t err;
190
191    err = mAcquiredBuffers[lockedIdx].mGraphicBuffer->unlock();
192    if (err != OK) {
193        CC_LOGE("%s: Unable to unlock graphic buffer %d", __FUNCTION__,
194                lockedIdx);
195        return err;
196    }
197    int buf = mAcquiredBuffers[lockedIdx].mSlot;
198
199    // release the buffer if it hasn't already been freed by the BufferQueue.
200    // This can happen, for example, when the producer of this buffer
201    // disconnected after this buffer was acquired.
202    if (CC_LIKELY(mAcquiredBuffers[lockedIdx].mGraphicBuffer ==
203            mSlots[buf].mGraphicBuffer)) {
204        releaseBufferLocked(
205                buf, mAcquiredBuffers[lockedIdx].mGraphicBuffer,
206                EGL_NO_DISPLAY, EGL_NO_SYNC_KHR);
207    }
208
209    AcquiredBuffer &ab = mAcquiredBuffers.editItemAt(lockedIdx);
210    ab.mSlot = BufferQueue::INVALID_BUFFER_SLOT;
211    ab.mBufferPointer = NULL;
212    ab.mGraphicBuffer.clear();
213
214    mCurrentLockedBuffers--;
215    return OK;
216}
217
218void CpuConsumer::freeBufferLocked(int slotIndex) {
219    ConsumerBase::freeBufferLocked(slotIndex);
220}
221
222} // namespace android
223