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 "BufferItemConsumer"
19//#define ATRACE_TAG ATRACE_TAG_GRAPHICS
20#include <utils/Log.h>
21
22#include <inttypes.h>
23
24#include <gui/BufferItem.h>
25#include <gui/BufferItemConsumer.h>
26
27#define BI_LOGV(x, ...) ALOGV("[%s] " x, mName.string(), ##__VA_ARGS__)
28//#define BI_LOGD(x, ...) ALOGD("[%s] " x, mName.string(), ##__VA_ARGS__)
29//#define BI_LOGI(x, ...) ALOGI("[%s] " x, mName.string(), ##__VA_ARGS__)
30//#define BI_LOGW(x, ...) ALOGW("[%s] " x, mName.string(), ##__VA_ARGS__)
31#define BI_LOGE(x, ...) ALOGE("[%s] " x, mName.string(), ##__VA_ARGS__)
32
33namespace android {
34
35BufferItemConsumer::BufferItemConsumer(
36        const sp<IGraphicBufferConsumer>& consumer, uint64_t consumerUsage,
37        int bufferCount, bool controlledByApp) :
38    ConsumerBase(consumer, controlledByApp)
39{
40    status_t err = mConsumer->setConsumerUsageBits(consumerUsage);
41    LOG_ALWAYS_FATAL_IF(err != OK,
42            "Failed to set consumer usage bits to %#" PRIx64, consumerUsage);
43    if (bufferCount != DEFAULT_MAX_BUFFERS) {
44        err = mConsumer->setMaxAcquiredBufferCount(bufferCount);
45        LOG_ALWAYS_FATAL_IF(err != OK,
46                "Failed to set max acquired buffer count to %d", bufferCount);
47    }
48}
49
50BufferItemConsumer::~BufferItemConsumer() {}
51
52void BufferItemConsumer::setBufferFreedListener(
53        const wp<BufferFreedListener>& listener) {
54    Mutex::Autolock _l(mMutex);
55    mBufferFreedListener = listener;
56}
57
58status_t BufferItemConsumer::acquireBuffer(BufferItem *item,
59        nsecs_t presentWhen, bool waitForFence) {
60    status_t err;
61
62    if (!item) return BAD_VALUE;
63
64    Mutex::Autolock _l(mMutex);
65
66    err = acquireBufferLocked(item, presentWhen);
67    if (err != OK) {
68        if (err != NO_BUFFER_AVAILABLE) {
69            BI_LOGE("Error acquiring buffer: %s (%d)", strerror(err), err);
70        }
71        return err;
72    }
73
74    if (waitForFence) {
75        err = item->mFence->waitForever("BufferItemConsumer::acquireBuffer");
76        if (err != OK) {
77            BI_LOGE("Failed to wait for fence of acquired buffer: %s (%d)",
78                    strerror(-err), err);
79            return err;
80        }
81    }
82
83    item->mGraphicBuffer = mSlots[item->mSlot].mGraphicBuffer;
84
85    return OK;
86}
87
88status_t BufferItemConsumer::releaseBuffer(const BufferItem &item,
89        const sp<Fence>& releaseFence) {
90    status_t err;
91
92    Mutex::Autolock _l(mMutex);
93
94    err = addReleaseFenceLocked(item.mSlot, item.mGraphicBuffer, releaseFence);
95    if (err != OK) {
96        BI_LOGE("Failed to addReleaseFenceLocked");
97    }
98
99    err = releaseBufferLocked(item.mSlot, item.mGraphicBuffer, EGL_NO_DISPLAY,
100            EGL_NO_SYNC_KHR);
101    if (err != OK && err != IGraphicBufferConsumer::STALE_BUFFER_SLOT) {
102        BI_LOGE("Failed to release buffer: %s (%d)",
103                strerror(-err), err);
104    }
105    return err;
106}
107
108void BufferItemConsumer::freeBufferLocked(int slotIndex) {
109    sp<BufferFreedListener> listener = mBufferFreedListener.promote();
110    if (listener != NULL && mSlots[slotIndex].mGraphicBuffer != NULL) {
111        // Fire callback if we have a listener registered and the buffer being freed is valid.
112        BI_LOGV("actually calling onBufferFreed");
113        listener->onBufferFreed(mSlots[slotIndex].mGraphicBuffer);
114    }
115    ConsumerBase::freeBufferLocked(slotIndex);
116}
117
118} // namespace android
119