GraphicBufferAllocator.cpp revision a947de88e7863859e6d7e825b1d45abb596a08e5 
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        if (rec.size) {
65            snprintf(buffer, SIZE, "%10p: %7.2f KiB | %4u (%4u) x %4u | %8X | 0x%08x\n",
66                    list.keyAt(i), rec.size/1024.0f,
67                    rec.w, rec.s, rec.h, rec.format, rec.usage);
68        } else {
69            snprintf(buffer, SIZE, "%10p: unknown     | %4u (%4u) x %4u | %8X | 0x%08x\n",
70                    list.keyAt(i),
71                    rec.w, rec.s, rec.h, rec.format, rec.usage);
72        }
73        result.append(buffer);
74        total += rec.size;
75    }
76    snprintf(buffer, SIZE, "Total allocated (estimate): %.2f KB\n", total/1024.0f);
77    result.append(buffer);
78    if (mAllocDev->common.version >= 1 && mAllocDev->dump) {
79        mAllocDev->dump(mAllocDev, buffer, SIZE);
80        result.append(buffer);
81    }
82}
83
84void GraphicBufferAllocator::dumpToSystemLog()
85{
86    String8 s;
87    GraphicBufferAllocator::getInstance().dump(s);
88    LOGD("%s", s.string());
89}
90
91status_t GraphicBufferAllocator::alloc(uint32_t w, uint32_t h, PixelFormat format,
92        int usage, buffer_handle_t* handle, int32_t* stride)
93{
94    // make sure to not allocate a N x 0 or 0 x N buffer, since this is
95    // allowed from an API stand-point allocate a 1x1 buffer instead.
96    if (!w || !h)
97        w = h = 1;
98
99    // we have a h/w allocator and h/w buffer is requested
100    status_t err;
101
102    err = mAllocDev->alloc(mAllocDev, w, h, format, usage, handle, stride);
103
104    LOGW_IF(err, "alloc(%u, %u, %d, %08x, ...) failed %d (%s)",
105            w, h, format, usage, err, strerror(-err));
106
107    if (err == NO_ERROR) {
108        Mutex::Autolock _l(sLock);
109        KeyedVector<buffer_handle_t, alloc_rec_t>& list(sAllocList);
110        int bpp = bytesPerPixel(format);
111        if (bpp < 0) {
112            // probably a HAL custom format. in any case, we don't know
113            // what its pixel size is.
114            bpp = 0;
115        }
116        alloc_rec_t rec;
117        rec.w = w;
118        rec.h = h;
119        rec.s = *stride;
120        rec.format = format;
121        rec.usage = usage;
122        rec.size = h * stride[0] * bpp;
123        list.add(*handle, rec);
124    }
125
126    return err;
127}
128
129status_t GraphicBufferAllocator::free(buffer_handle_t handle)
130{
131    status_t err;
132
133    err = mAllocDev->free(mAllocDev, handle);
134
135    LOGW_IF(err, "free(...) failed %d (%s)", err, strerror(-err));
136    if (err == NO_ERROR) {
137        Mutex::Autolock _l(sLock);
138        KeyedVector<buffer_handle_t, alloc_rec_t>& list(sAllocList);
139        list.removeItem(handle);
140    }
141
142    return err;
143}
144
145// ---------------------------------------------------------------------------
146}; // namespace android
147