GraphicBufferListener.cpp revision c98021fd30ad6ae6ae7a51c89fdb0008e093843a
1/* 2 * Copyright (C) 2014 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 "GraphicBufferListener" 19 20#include <media/stagefright/foundation/ADebug.h> 21#include <media/stagefright/foundation/AMessage.h> 22#include <media/stagefright/MediaErrors.h> 23 24#include "GraphicBufferListener.h" 25 26namespace android { 27 28status_t GraphicBufferListener::init( 29 const sp<AMessage> ¬ify, 30 size_t bufferWidth, size_t bufferHeight, size_t bufferCount) { 31 mNotify = notify; 32 33 String8 name("GraphicBufferListener"); 34 BufferQueue::createBufferQueue(&mProducer, &mConsumer); 35 mConsumer->setConsumerName(name); 36 mConsumer->setDefaultBufferSize(bufferWidth, bufferHeight); 37 mConsumer->setConsumerUsageBits(GRALLOC_USAGE_SW_READ_OFTEN); 38 39 status_t err = mConsumer->setMaxAcquiredBufferCount(bufferCount); 40 if (err != NO_ERROR) { 41 ALOGE("Unable to set BQ max acquired buffer count to %u: %d", 42 bufferCount, err); 43 return err; 44 } 45 46 wp<BufferQueue::ConsumerListener> listener = 47 static_cast<BufferQueue::ConsumerListener*>(this); 48 sp<BufferQueue::ProxyConsumerListener> proxy = 49 new BufferQueue::ProxyConsumerListener(listener); 50 51 err = mConsumer->consumerConnect(proxy, false); 52 if (err != NO_ERROR) { 53 ALOGE("Error connecting to BufferQueue: %s (%d)", 54 strerror(-err), err); 55 return err; 56 } 57 58 ALOGV("init() successful."); 59 60 return OK; 61} 62 63void GraphicBufferListener::onFrameAvailable(const BufferItem& /* item */) { 64 ALOGV("onFrameAvailable() called"); 65 66 { 67 Mutex::Autolock autoLock(mMutex); 68 mNumFramesAvailable++; 69 } 70 71 sp<AMessage> notify = mNotify->dup(); 72 mNotify->setWhat(kWhatFrameAvailable); 73 mNotify->post(); 74} 75 76void GraphicBufferListener::onBuffersReleased() { 77 ALOGV("onBuffersReleased() called"); 78 // nothing to do 79} 80 81void GraphicBufferListener::onSidebandStreamChanged() { 82 ALOGW("GraphicBufferListener cannot consume sideband streams."); 83 // nothing to do 84} 85 86BufferQueue::BufferItem GraphicBufferListener::getBufferItem() { 87 BufferQueue::BufferItem item; 88 89 { 90 Mutex::Autolock autoLock(mMutex); 91 if (mNumFramesAvailable <= 0) { 92 ALOGE("getBuffer() called with no frames available"); 93 return item; 94 } 95 mNumFramesAvailable--; 96 } 97 98 status_t err = mConsumer->acquireBuffer(&item, 0); 99 if (err == BufferQueue::NO_BUFFER_AVAILABLE) { 100 // shouldn't happen, since we track num frames available 101 ALOGE("frame was not available"); 102 item.mBuf = -1; 103 return item; 104 } else if (err != OK) { 105 ALOGE("acquireBuffer returned err=%d", err); 106 item.mBuf = -1; 107 return item; 108 } 109 110 // Wait for it to become available. 111 err = item.mFence->waitForever("GraphicBufferListener::getBufferItem"); 112 if (err != OK) { 113 ALOGW("failed to wait for buffer fence: %d", err); 114 // keep going 115 } 116 117 // If this is the first time we're seeing this buffer, add it to our 118 // slot table. 119 if (item.mGraphicBuffer != NULL) { 120 ALOGV("setting mBufferSlot %d", item.mBuf); 121 mBufferSlot[item.mBuf] = item.mGraphicBuffer; 122 } 123 124 return item; 125} 126 127sp<GraphicBuffer> GraphicBufferListener::getBuffer( 128 BufferQueue::BufferItem item) { 129 sp<GraphicBuffer> buf; 130 if (item.mBuf < 0 || item.mBuf >= BufferQueue::NUM_BUFFER_SLOTS) { 131 ALOGE("getBuffer() received invalid BufferItem: mBuf==%d", item.mBuf); 132 return buf; 133 } 134 135 buf = mBufferSlot[item.mBuf]; 136 CHECK(buf.get() != NULL); 137 138 return buf; 139} 140 141status_t GraphicBufferListener::releaseBuffer( 142 BufferQueue::BufferItem item) { 143 if (item.mBuf < 0 || item.mBuf >= BufferQueue::NUM_BUFFER_SLOTS) { 144 ALOGE("getBuffer() received invalid BufferItem: mBuf==%d", item.mBuf); 145 return ERROR_OUT_OF_RANGE; 146 } 147 148 mConsumer->releaseBuffer(item.mBuf, item.mFrameNumber, 149 EGL_NO_DISPLAY, EGL_NO_SYNC_KHR, Fence::NO_FENCE); 150 151 return OK; 152} 153 154} // namespace android 155