MetadataRetrieverClient.cpp revision 7f7d52ac18dfc3c6d8f6267dad29306613e9bd0e 
1/*
2**
3** Copyright (C) 2008 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_NDEBUG 0
19#define LOG_TAG "MetadataRetrieverClient"
20#include <utils/Log.h>
21
22#include <sys/types.h>
23#include <sys/stat.h>
24#include <sys/resource.h>
25#include <dirent.h>
26#include <unistd.h>
27
28#include <string.h>
29#include <cutils/atomic.h>
30#include <cutils/properties.h>
31#include <binder/MemoryBase.h>
32#include <binder/MemoryHeapBase.h>
33#include <android_runtime/ActivityManager.h>
34#include <binder/IPCThreadState.h>
35#include <binder/IServiceManager.h>
36#include <media/MediaMetadataRetrieverInterface.h>
37#include <media/MediaPlayerInterface.h>
38#include <private/media/VideoFrame.h>
39#include "MidiMetadataRetriever.h"
40#include "MetadataRetrieverClient.h"
41#include "StagefrightMetadataRetriever.h"
42
43/* desktop Linux needs a little help with gettid() */
44#if defined(HAVE_GETTID) && !defined(HAVE_ANDROID_OS)
45#define __KERNEL__
46# include <linux/unistd.h>
47#ifdef _syscall0
48_syscall0(pid_t,gettid)
49#else
50pid_t gettid() { return syscall(__NR_gettid);}
51#endif
52#undef __KERNEL__
53#endif
54
55namespace android {
56
57extern player_type getPlayerType(const char* url);
58extern player_type getPlayerType(int fd, int64_t offset, int64_t length);
59
60MetadataRetrieverClient::MetadataRetrieverClient(pid_t pid)
61{
62    LOGV("MetadataRetrieverClient constructor pid(%d)", pid);
63    mPid = pid;
64    mThumbnail = NULL;
65    mAlbumArt = NULL;
66    mRetriever = NULL;
67}
68
69MetadataRetrieverClient::~MetadataRetrieverClient()
70{
71    LOGV("MetadataRetrieverClient destructor");
72    disconnect();
73}
74
75status_t MetadataRetrieverClient::dump(int fd, const Vector<String16>& args) const
76{
77    const size_t SIZE = 256;
78    char buffer[SIZE];
79    String8 result;
80    result.append(" MetadataRetrieverClient\n");
81    snprintf(buffer, 255, "  pid(%d)\n", mPid);
82    result.append(buffer);
83    write(fd, result.string(), result.size());
84    write(fd, "\n", 1);
85    return NO_ERROR;
86}
87
88void MetadataRetrieverClient::disconnect()
89{
90    LOGV("disconnect from pid %d", mPid);
91    Mutex::Autolock lock(mLock);
92    mRetriever.clear();
93    mThumbnail.clear();
94    mAlbumArt.clear();
95    IPCThreadState::self()->flushCommands();
96}
97
98static sp<MediaMetadataRetrieverBase> createRetriever(player_type playerType)
99{
100    sp<MediaMetadataRetrieverBase> p;
101    switch (playerType) {
102        case STAGEFRIGHT_PLAYER:
103        {
104            p = new StagefrightMetadataRetriever;
105            break;
106        }
107        case SONIVOX_PLAYER:
108            LOGV("create midi metadata retriever");
109            p = new MidiMetadataRetriever();
110            break;
111        default:
112            // TODO:
113            // support for TEST_PLAYER
114            LOGE("player type %d is not supported",  playerType);
115            break;
116    }
117    if (p == NULL) {
118        LOGE("failed to create a retriever object");
119    }
120    return p;
121}
122
123status_t MetadataRetrieverClient::setDataSource(const char *url)
124{
125    LOGV("setDataSource(%s)", url);
126    Mutex::Autolock lock(mLock);
127    if (url == NULL) {
128        return UNKNOWN_ERROR;
129    }
130    player_type playerType = getPlayerType(url);
131    LOGV("player type = %d", playerType);
132    sp<MediaMetadataRetrieverBase> p = createRetriever(playerType);
133    if (p == NULL) return NO_INIT;
134    status_t ret = p->setDataSource(url);
135    if (ret == NO_ERROR) mRetriever = p;
136    return ret;
137}
138
139status_t MetadataRetrieverClient::setDataSource(int fd, int64_t offset, int64_t length)
140{
141    LOGV("setDataSource fd=%d, offset=%lld, length=%lld", fd, offset, length);
142    Mutex::Autolock lock(mLock);
143    struct stat sb;
144    int ret = fstat(fd, &sb);
145    if (ret != 0) {
146        LOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
147        return BAD_VALUE;
148    }
149    LOGV("st_dev  = %llu", sb.st_dev);
150    LOGV("st_mode = %u", sb.st_mode);
151    LOGV("st_uid  = %lu", sb.st_uid);
152    LOGV("st_gid  = %lu", sb.st_gid);
153    LOGV("st_size = %llu", sb.st_size);
154
155    if (offset >= sb.st_size) {
156        LOGE("offset (%lld) bigger than file size (%llu)", offset, sb.st_size);
157        ::close(fd);
158        return BAD_VALUE;
159    }
160    if (offset + length > sb.st_size) {
161        length = sb.st_size - offset;
162        LOGV("calculated length = %lld", length);
163    }
164
165    player_type playerType = getPlayerType(fd, offset, length);
166    LOGV("player type = %d", playerType);
167    sp<MediaMetadataRetrieverBase> p = createRetriever(playerType);
168    if (p == NULL) {
169        ::close(fd);
170        return NO_INIT;
171    }
172    status_t status = p->setDataSource(fd, offset, length);
173    if (status == NO_ERROR) mRetriever = p;
174    ::close(fd);
175    return status;
176}
177
178sp<IMemory> MetadataRetrieverClient::getFrameAtTime(int64_t timeUs, int option)
179{
180    LOGV("getFrameAtTime: time(%lld us) option(%d)", timeUs, option);
181    Mutex::Autolock lock(mLock);
182    mThumbnail.clear();
183    if (mRetriever == NULL) {
184        LOGE("retriever is not initialized");
185        return NULL;
186    }
187    VideoFrame *frame = mRetriever->getFrameAtTime(timeUs, option);
188    if (frame == NULL) {
189        LOGE("failed to capture a video frame");
190        return NULL;
191    }
192    size_t size = sizeof(VideoFrame) + frame->mSize;
193    sp<MemoryHeapBase> heap = new MemoryHeapBase(size, 0, "MetadataRetrieverClient");
194    if (heap == NULL) {
195        LOGE("failed to create MemoryDealer");
196        delete frame;
197        return NULL;
198    }
199    mThumbnail = new MemoryBase(heap, 0, size);
200    if (mThumbnail == NULL) {
201        LOGE("not enough memory for VideoFrame size=%u", size);
202        delete frame;
203        return NULL;
204    }
205    VideoFrame *frameCopy = static_cast<VideoFrame *>(mThumbnail->pointer());
206    frameCopy->mWidth = frame->mWidth;
207    frameCopy->mHeight = frame->mHeight;
208    frameCopy->mDisplayWidth = frame->mDisplayWidth;
209    frameCopy->mDisplayHeight = frame->mDisplayHeight;
210    frameCopy->mSize = frame->mSize;
211    frameCopy->mRotationAngle = frame->mRotationAngle;
212    LOGV("rotation: %d", frameCopy->mRotationAngle);
213    frameCopy->mData = (uint8_t *)frameCopy + sizeof(VideoFrame);
214    memcpy(frameCopy->mData, frame->mData, frame->mSize);
215    delete frame;  // Fix memory leakage
216    return mThumbnail;
217}
218
219sp<IMemory> MetadataRetrieverClient::extractAlbumArt()
220{
221    LOGV("extractAlbumArt");
222    Mutex::Autolock lock(mLock);
223    mAlbumArt.clear();
224    if (mRetriever == NULL) {
225        LOGE("retriever is not initialized");
226        return NULL;
227    }
228    MediaAlbumArt *albumArt = mRetriever->extractAlbumArt();
229    if (albumArt == NULL) {
230        LOGE("failed to extract an album art");
231        return NULL;
232    }
233    size_t size = sizeof(MediaAlbumArt) + albumArt->mSize;
234    sp<MemoryHeapBase> heap = new MemoryHeapBase(size, 0, "MetadataRetrieverClient");
235    if (heap == NULL) {
236        LOGE("failed to create MemoryDealer object");
237        delete albumArt;
238        return NULL;
239    }
240    mAlbumArt = new MemoryBase(heap, 0, size);
241    if (mAlbumArt == NULL) {
242        LOGE("not enough memory for MediaAlbumArt size=%u", size);
243        delete albumArt;
244        return NULL;
245    }
246    MediaAlbumArt *albumArtCopy = static_cast<MediaAlbumArt *>(mAlbumArt->pointer());
247    albumArtCopy->mSize = albumArt->mSize;
248    albumArtCopy->mData = (uint8_t *)albumArtCopy + sizeof(MediaAlbumArt);
249    memcpy(albumArtCopy->mData, albumArt->mData, albumArt->mSize);
250    delete albumArt;  // Fix memory leakage
251    return mAlbumArt;
252}
253
254const char* MetadataRetrieverClient::extractMetadata(int keyCode)
255{
256    LOGV("extractMetadata");
257    Mutex::Autolock lock(mLock);
258    if (mRetriever == NULL) {
259        LOGE("retriever is not initialized");
260        return NULL;
261    }
262    return mRetriever->extractMetadata(keyCode);
263}
264
265}; // namespace android
266