GraphicBufferAllocator.cpp revision 3330b203039dea366d4981db1408a460134b2d2c 
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#include <cutils/log.h>
19
20#include <utils/Singleton.h>
21#include <utils/String8.h>
22
23#include <ui/GraphicBufferAllocator.h>
24
25
26namespace android {
27// ---------------------------------------------------------------------------
28
29ANDROID_SINGLETON_STATIC_INSTANCE( GraphicBufferAllocator )
30
31Mutex GraphicBufferAllocator::sLock;
32KeyedVector<buffer_handle_t, GraphicBufferAllocator::alloc_rec_t> GraphicBufferAllocator::sAllocList;
33
34GraphicBufferAllocator::GraphicBufferAllocator()
35    : mAllocDev(0)
36{
37    hw_module_t const* module;
38    int err = hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module);
39    LOGE_IF(err, "FATAL: can't find the %s module", GRALLOC_HARDWARE_MODULE_ID);
40    if (err == 0) {
41        gralloc_open(module, &mAllocDev);
42    }
43}
44
45GraphicBufferAllocator::~GraphicBufferAllocator()
46{
47    gralloc_close(mAllocDev);
48}
49
50void GraphicBufferAllocator::dump(String8& result) const
51{
52    Mutex::Autolock _l(sLock);
53    KeyedVector<buffer_handle_t, alloc_rec_t>& list(sAllocList);
54    size_t total = 0;
55    const size_t SIZE = 512;
56    char buffer[SIZE];
57    snprintf(buffer, SIZE, "Allocated buffers:\n");
58    result.append(buffer);
59    const size_t c = list.size();
60    for (size_t i=0 ; i<c ; i++) {
61        const alloc_rec_t& rec(list.valueAt(i));
62        snprintf(buffer, SIZE, "%10p: %7.2f KiB | %4u x %4u | %2d | 0x%08x\n",
63            list.keyAt(i), rec.size/1024.0f,
64            rec.w, rec.h, rec.format, rec.usage);
65        result.append(buffer);
66        total += rec.size;
67    }
68    snprintf(buffer, SIZE, "Total allocated: %.2f KB\n", total/1024.0f);
69    result.append(buffer);
70}
71
72static inline uint32_t clamp(uint32_t c) {
73    return c>0 ? c : 1;
74}
75
76status_t GraphicBufferAllocator::alloc(uint32_t w, uint32_t h, PixelFormat format,
77        int usage, buffer_handle_t* handle, int32_t* stride)
78{
79    Mutex::Autolock _l(mLock);
80
81    // make sure to not allocate a 0 x 0 buffer
82    w = clamp(w);
83    h = clamp(h);
84
85    // we have a h/w allocator and h/w buffer is requested
86    status_t err = mAllocDev->alloc(mAllocDev,
87            w, h, format, usage, handle, stride);
88
89    LOGW_IF(err, "alloc(%u, %u, %d, %08x, ...) failed %d (%s)",
90            w, h, format, usage, err, strerror(-err));
91
92    if (err == NO_ERROR) {
93        Mutex::Autolock _l(sLock);
94        KeyedVector<buffer_handle_t, alloc_rec_t>& list(sAllocList);
95        alloc_rec_t rec;
96        rec.w = w;
97        rec.h = h;
98        rec.format = format;
99        rec.usage = usage;
100        rec.vaddr = 0;
101        rec.size = h * stride[0] * bytesPerPixel(format);
102        list.add(*handle, rec);
103    } else {
104        String8 s;
105        dump(s);
106        LOGD("%s", s.string());
107    }
108
109    return err;
110}
111
112status_t GraphicBufferAllocator::free(buffer_handle_t handle)
113{
114    Mutex::Autolock _l(mLock);
115
116    status_t err = mAllocDev->free(mAllocDev, handle);
117    LOGW_IF(err, "free(...) failed %d (%s)", err, strerror(-err));
118
119    if (err == NO_ERROR) {
120        Mutex::Autolock _l(sLock);
121        KeyedVector<buffer_handle_t, alloc_rec_t>& list(sAllocList);
122        list.removeItem(handle);
123    }
124
125    return err;
126}
127
128// ---------------------------------------------------------------------------
129}; // namespace android
130