CpuConsumer.cpp revision 847f11e215e86b107ab50c1359fc7bc3cd7a3a11 
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/BufferItem.h>
24#include <gui/CpuConsumer.h>
25
26#define CC_LOGV(x, ...) ALOGV("[%s] " x, mName.string(), ##__VA_ARGS__)
27//#define CC_LOGD(x, ...) ALOGD("[%s] " x, mName.string(), ##__VA_ARGS__)
28//#define CC_LOGI(x, ...) ALOGI("[%s] " x, mName.string(), ##__VA_ARGS__)
29#define CC_LOGW(x, ...) ALOGW("[%s] " x, mName.string(), ##__VA_ARGS__)
30#define CC_LOGE(x, ...) ALOGE("[%s] " x, mName.string(), ##__VA_ARGS__)
31
32namespace android {
33
34CpuConsumer::CpuConsumer(const sp<IGraphicBufferConsumer>& bq,
35        size_t maxLockedBuffers, bool controlledByApp) :
36    ConsumerBase(bq, controlledByApp),
37    mMaxLockedBuffers(maxLockedBuffers),
38    mCurrentLockedBuffers(0)
39{
40    // Create tracking entries for locked buffers
41    mAcquiredBuffers.insertAt(0, maxLockedBuffers);
42
43    mConsumer->setConsumerUsageBits(GRALLOC_USAGE_SW_READ_OFTEN);
44    mConsumer->setMaxAcquiredBufferCount(static_cast<int32_t>(maxLockedBuffers));
45}
46
47CpuConsumer::~CpuConsumer() {
48    // ConsumerBase destructor does all the work.
49}
50
51
52
53void CpuConsumer::setName(const String8& name) {
54    Mutex::Autolock _l(mMutex);
55    mName = name;
56    mConsumer->setConsumerName(name);
57}
58
59static bool isPossiblyYUV(PixelFormat format) {
60    switch (static_cast<int>(format)) {
61        case HAL_PIXEL_FORMAT_RGBA_8888:
62        case HAL_PIXEL_FORMAT_RGBX_8888:
63        case HAL_PIXEL_FORMAT_RGB_888:
64        case HAL_PIXEL_FORMAT_RGB_565:
65        case HAL_PIXEL_FORMAT_BGRA_8888:
66        case HAL_PIXEL_FORMAT_Y8:
67        case HAL_PIXEL_FORMAT_Y16:
68        case HAL_PIXEL_FORMAT_RAW16:
69        case HAL_PIXEL_FORMAT_RAW10:
70        case HAL_PIXEL_FORMAT_RAW_OPAQUE:
71        case HAL_PIXEL_FORMAT_BLOB:
72        case HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED:
73            return false;
74
75        case HAL_PIXEL_FORMAT_YV12:
76        case HAL_PIXEL_FORMAT_YCbCr_420_888:
77        case HAL_PIXEL_FORMAT_YCbCr_422_SP:
78        case HAL_PIXEL_FORMAT_YCrCb_420_SP:
79        case HAL_PIXEL_FORMAT_YCbCr_422_I:
80        default:
81            return true;
82    }
83}
84
85status_t CpuConsumer::lockNextBuffer(LockedBuffer *nativeBuffer) {
86    status_t err;
87
88    if (!nativeBuffer) return BAD_VALUE;
89    if (mCurrentLockedBuffers == mMaxLockedBuffers) {
90        CC_LOGW("Max buffers have been locked (%zd), cannot lock anymore.",
91                mMaxLockedBuffers);
92        return NOT_ENOUGH_DATA;
93    }
94
95    BufferItem b;
96
97    Mutex::Autolock _l(mMutex);
98
99    err = acquireBufferLocked(&b, 0);
100    if (err != OK) {
101        if (err == BufferQueue::NO_BUFFER_AVAILABLE) {
102            return BAD_VALUE;
103        } else {
104            CC_LOGE("Error acquiring buffer: %s (%d)", strerror(err), err);
105            return err;
106        }
107    }
108
109    int buf = b.mBuf;
110
111    void *bufferPointer = NULL;
112    android_ycbcr ycbcr = android_ycbcr();
113
114    PixelFormat format = mSlots[buf].mGraphicBuffer->getPixelFormat();
115    PixelFormat flexFormat = format;
116    if (isPossiblyYUV(format)) {
117        if (b.mFence.get()) {
118            err = mSlots[buf].mGraphicBuffer->lockAsyncYCbCr(
119                GraphicBuffer::USAGE_SW_READ_OFTEN,
120                b.mCrop,
121                &ycbcr,
122                b.mFence->dup());
123        } else {
124            err = mSlots[buf].mGraphicBuffer->lockYCbCr(
125                GraphicBuffer::USAGE_SW_READ_OFTEN,
126                b.mCrop,
127                &ycbcr);
128        }
129        if (err == OK) {
130            bufferPointer = ycbcr.y;
131            flexFormat = HAL_PIXEL_FORMAT_YCbCr_420_888;
132            if (format != HAL_PIXEL_FORMAT_YCbCr_420_888) {
133                CC_LOGV("locking buffer of format %#x as flex YUV", format);
134            }
135        } else if (format == HAL_PIXEL_FORMAT_YCbCr_420_888) {
136            CC_LOGE("Unable to lock YCbCr buffer for CPU reading: %s (%d)",
137                    strerror(-err), err);
138            return err;
139        }
140    }
141
142    if (bufferPointer == NULL) { // not flexible YUV
143        if (b.mFence.get()) {
144            err = mSlots[buf].mGraphicBuffer->lockAsync(
145                GraphicBuffer::USAGE_SW_READ_OFTEN,
146                b.mCrop,
147                &bufferPointer,
148                b.mFence->dup());
149        } else {
150            err = mSlots[buf].mGraphicBuffer->lock(
151                GraphicBuffer::USAGE_SW_READ_OFTEN,
152                b.mCrop,
153                &bufferPointer);
154        }
155        if (err != OK) {
156            CC_LOGE("Unable to lock buffer for CPU reading: %s (%d)",
157                    strerror(-err), err);
158            return err;
159        }
160    }
161
162    size_t lockedIdx = 0;
163    for (; lockedIdx < static_cast<size_t>(mMaxLockedBuffers); lockedIdx++) {
164        if (mAcquiredBuffers[lockedIdx].mSlot ==
165                BufferQueue::INVALID_BUFFER_SLOT) {
166            break;
167        }
168    }
169    assert(lockedIdx < mMaxLockedBuffers);
170
171    AcquiredBuffer &ab = mAcquiredBuffers.editItemAt(lockedIdx);
172    ab.mSlot = buf;
173    ab.mBufferPointer = bufferPointer;
174    ab.mGraphicBuffer = mSlots[buf].mGraphicBuffer;
175
176    nativeBuffer->data   =
177            reinterpret_cast<uint8_t*>(bufferPointer);
178    nativeBuffer->width  = mSlots[buf].mGraphicBuffer->getWidth();
179    nativeBuffer->height = mSlots[buf].mGraphicBuffer->getHeight();
180    nativeBuffer->format = format;
181    nativeBuffer->flexFormat = flexFormat;
182    nativeBuffer->stride = (ycbcr.y != NULL) ?
183            static_cast<uint32_t>(ycbcr.ystride) :
184            mSlots[buf].mGraphicBuffer->getStride();
185
186    nativeBuffer->crop        = b.mCrop;
187    nativeBuffer->transform   = b.mTransform;
188    nativeBuffer->scalingMode = b.mScalingMode;
189    nativeBuffer->timestamp   = b.mTimestamp;
190    nativeBuffer->dataSpace   = b.mDataSpace;
191    nativeBuffer->frameNumber = b.mFrameNumber;
192
193    nativeBuffer->dataCb       = reinterpret_cast<uint8_t*>(ycbcr.cb);
194    nativeBuffer->dataCr       = reinterpret_cast<uint8_t*>(ycbcr.cr);
195    nativeBuffer->chromaStride = static_cast<uint32_t>(ycbcr.cstride);
196    nativeBuffer->chromaStep   = static_cast<uint32_t>(ycbcr.chroma_step);
197
198    mCurrentLockedBuffers++;
199
200    return OK;
201}
202
203status_t CpuConsumer::unlockBuffer(const LockedBuffer &nativeBuffer) {
204    Mutex::Autolock _l(mMutex);
205    size_t lockedIdx = 0;
206
207    void *bufPtr = reinterpret_cast<void *>(nativeBuffer.data);
208    for (; lockedIdx < static_cast<size_t>(mMaxLockedBuffers); lockedIdx++) {
209        if (bufPtr == mAcquiredBuffers[lockedIdx].mBufferPointer) break;
210    }
211    if (lockedIdx == mMaxLockedBuffers) {
212        CC_LOGE("%s: Can't find buffer to free", __FUNCTION__);
213        return BAD_VALUE;
214    }
215
216    return releaseAcquiredBufferLocked(lockedIdx);
217}
218
219status_t CpuConsumer::releaseAcquiredBufferLocked(size_t lockedIdx) {
220    status_t err;
221    int fd = -1;
222
223    err = mAcquiredBuffers[lockedIdx].mGraphicBuffer->unlockAsync(&fd);
224    if (err != OK) {
225        CC_LOGE("%s: Unable to unlock graphic buffer %zd", __FUNCTION__,
226                lockedIdx);
227        return err;
228    }
229    int buf = mAcquiredBuffers[lockedIdx].mSlot;
230    if (CC_LIKELY(fd != -1)) {
231        sp<Fence> fence(new Fence(fd));
232        addReleaseFenceLocked(
233            mAcquiredBuffers[lockedIdx].mSlot,
234            mSlots[buf].mGraphicBuffer,
235            fence);
236    }
237
238    // release the buffer if it hasn't already been freed by the BufferQueue.
239    // This can happen, for example, when the producer of this buffer
240    // disconnected after this buffer was acquired.
241    if (CC_LIKELY(mAcquiredBuffers[lockedIdx].mGraphicBuffer ==
242            mSlots[buf].mGraphicBuffer)) {
243        releaseBufferLocked(
244                buf, mAcquiredBuffers[lockedIdx].mGraphicBuffer,
245                EGL_NO_DISPLAY, EGL_NO_SYNC_KHR);
246    }
247
248    AcquiredBuffer &ab = mAcquiredBuffers.editItemAt(lockedIdx);
249    ab.mSlot = BufferQueue::INVALID_BUFFER_SLOT;
250    ab.mBufferPointer = NULL;
251    ab.mGraphicBuffer.clear();
252
253    mCurrentLockedBuffers--;
254    return OK;
255}
256
257void CpuConsumer::freeBufferLocked(int slotIndex) {
258    ConsumerBase::freeBufferLocked(slotIndex);
259}
260
261} // namespace android
262