GraphicBufferAllocator.cpp revision 0a757814f3e4ca4db772144e85b687fe89a7fba5 
1/*
2**
3** Copyright 2009, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18#define LOG_TAG "GraphicBufferAllocator"
19
20#include <cutils/log.h>
21
22#include <utils/Singleton.h>
23#include <utils/String8.h>
24
25#include <ui/GraphicBufferAllocator.h>
26
27namespace android {
28// ---------------------------------------------------------------------------
29
30ANDROID_SINGLETON_STATIC_INSTANCE( GraphicBufferAllocator )
31
32Mutex GraphicBufferAllocator::sLock;
33KeyedVector<buffer_handle_t,
34    GraphicBufferAllocator::alloc_rec_t> GraphicBufferAllocator::sAllocList;
35
36GraphicBufferAllocator::GraphicBufferAllocator()
37    : mAllocDev(0)
38{
39    hw_module_t const* module;
40    int err = hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module);
41    LOGE_IF(err, "FATAL: can't find the %s module", GRALLOC_HARDWARE_MODULE_ID);
42    if (err == 0) {
43        gralloc_open(module, &mAllocDev);
44    }
45}
46
47GraphicBufferAllocator::~GraphicBufferAllocator()
48{
49    gralloc_close(mAllocDev);
50}
51
52void GraphicBufferAllocator::dump(String8& result) const
53{
54    Mutex::Autolock _l(sLock);
55    KeyedVector<buffer_handle_t, alloc_rec_t>& list(sAllocList);
56    size_t total = 0;
57    const size_t SIZE = 4096;
58    char buffer[SIZE];
59    snprintf(buffer, SIZE, "Allocated buffers:\n");
60    result.append(buffer);
61    const size_t c = list.size();
62    for (size_t i=0 ; i<c ; i++) {
63        const alloc_rec_t& rec(list.valueAt(i));
64        snprintf(buffer, SIZE, "%10p: %7.2f KiB | %4u (%4u) x %4u | %2d | 0x%08x\n",
65            list.keyAt(i), rec.size/1024.0f,
66            rec.w, rec.s, rec.h, rec.format, rec.usage);
67        result.append(buffer);
68        total += rec.size;
69    }
70    snprintf(buffer, SIZE, "Total allocated: %.2f KB\n", total/1024.0f);
71    result.append(buffer);
72    if (mAllocDev->common.version >= 1 && mAllocDev->dump) {
73        mAllocDev->dump(mAllocDev, buffer, SIZE);
74        result.append(buffer);
75    }
76}
77
78void GraphicBufferAllocator::dumpToSystemLog()
79{
80    String8 s;
81    GraphicBufferAllocator::getInstance().dump(s);
82    LOGD("%s", s.string());
83}
84
85status_t GraphicBufferAllocator::alloc(uint32_t w, uint32_t h, PixelFormat format,
86        int usage, buffer_handle_t* handle, int32_t* stride)
87{
88    // make sure to not allocate a N x 0 or 0 x N buffer, since this is
89    // allowed from an API stand-point allocate a 1x1 buffer instead.
90    if (!w || !h)
91        w = h = 1;
92
93    // we have a h/w allocator and h/w buffer is requested
94    status_t err;
95
96    err = mAllocDev->alloc(mAllocDev, w, h, format, usage, handle, stride);
97
98    LOGW_IF(err, "alloc(%u, %u, %d, %08x, ...) failed %d (%s)",
99            w, h, format, usage, err, strerror(-err));
100
101    if (err == NO_ERROR) {
102        Mutex::Autolock _l(sLock);
103        KeyedVector<buffer_handle_t, alloc_rec_t>& list(sAllocList);
104        alloc_rec_t rec;
105        rec.w = w;
106        rec.h = h;
107        rec.s = *stride;
108        rec.format = format;
109        rec.usage = usage;
110        rec.size = h * stride[0] * bytesPerPixel(format);
111        list.add(*handle, rec);
112    }
113
114    return err;
115}
116
117status_t GraphicBufferAllocator::free(buffer_handle_t handle)
118{
119    status_t err;
120
121    err = mAllocDev->free(mAllocDev, handle);
122
123    LOGW_IF(err, "free(...) failed %d (%s)", err, strerror(-err));
124    if (err == NO_ERROR) {
125        Mutex::Autolock _l(sLock);
126        KeyedVector<buffer_handle_t, alloc_rec_t>& list(sAllocList);
127        list.removeItem(handle);
128    }
129
130    return err;
131}
132
133// ---------------------------------------------------------------------------
134}; // namespace android
135