MetadataRetrieverClient.cpp revision 47945ea184f62def4c5a1dd15164cfa3fd286882 
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 <binder/MemoryDealer.h>
31#include <android_runtime/ActivityManager.h>
32#include <binder/IPCThreadState.h>
33#include <binder/IServiceManager.h>
34#include <media/MediaMetadataRetrieverInterface.h>
35#include <media/MediaPlayerInterface.h>
36#include <media/PVMetadataRetriever.h>
37#include <private/media/VideoFrame.h>
38#include "VorbisMetadataRetriever.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    mThumbnailDealer = NULL;
65    mAlbumArtDealer = NULL;
66    mThumbnail = NULL;
67    mAlbumArt = NULL;
68    mRetriever = NULL;
69    mMode = METADATA_MODE_FRAME_CAPTURE_AND_METADATA_RETRIEVAL;
70}
71
72MetadataRetrieverClient::~MetadataRetrieverClient()
73{
74    LOGV("MetadataRetrieverClient destructor");
75    disconnect();
76}
77
78status_t MetadataRetrieverClient::dump(int fd, const Vector<String16>& args) const
79{
80    const size_t SIZE = 256;
81    char buffer[SIZE];
82    String8 result;
83    result.append(" MetadataRetrieverClient\n");
84    snprintf(buffer, 255, "  pid(%d) mode(%d)\n", mPid, mMode);
85    result.append(buffer);
86    write(fd, result.string(), result.size());
87    write(fd, "\n", 1);
88    return NO_ERROR;
89}
90
91void MetadataRetrieverClient::disconnect()
92{
93    LOGV("disconnect from pid %d", mPid);
94    Mutex::Autolock lock(mLock);
95    mRetriever.clear();
96    mThumbnailDealer.clear();
97    mAlbumArtDealer.clear();
98    mThumbnail.clear();
99    mAlbumArt.clear();
100    mMode = METADATA_MODE_FRAME_CAPTURE_AND_METADATA_RETRIEVAL;
101    IPCThreadState::self()->flushCommands();
102}
103
104static sp<MediaMetadataRetrieverBase> createRetriever(player_type playerType)
105{
106    sp<MediaMetadataRetrieverBase> p;
107    switch (playerType) {
108#if BUILD_WITH_FULL_STAGEFRIGHT
109        case STAGEFRIGHT_PLAYER:
110            // For now we are going to keep using PV for meta-data support
111            // until stagefright is up to par.
112
113            // LOGV("create StagefrightMetadataRetriever");
114            // p = new StagefrightMetadataRetriever;
115            // break;
116
117            // fall through to PV_PLAYER
118#endif
119#ifndef NO_OPENCORE
120        case PV_PLAYER:
121            LOGV("create pv metadata retriever");
122            p = new PVMetadataRetriever();
123            break;
124#endif
125        case VORBIS_PLAYER:
126            LOGV("create vorbis metadata retriever");
127            p = new VorbisMetadataRetriever();
128            break;
129        case SONIVOX_PLAYER:
130            LOGV("create midi metadata retriever");
131            p = new MidiMetadataRetriever();
132            break;
133        default:
134            // TODO:
135            // support for TEST_PLAYER
136            LOGE("player type %d is not supported",  playerType);
137            break;
138    }
139    if (p == NULL) {
140        LOGE("failed to create a retriever object");
141    }
142    return p;
143}
144
145status_t MetadataRetrieverClient::setDataSource(const char *url)
146{
147    LOGV("setDataSource(%s)", url);
148    Mutex::Autolock lock(mLock);
149    if (url == NULL) {
150        return UNKNOWN_ERROR;
151    }
152    player_type playerType = getPlayerType(url);
153    LOGV("player type = %d", playerType);
154    sp<MediaMetadataRetrieverBase> p = createRetriever(playerType);
155    if (p == NULL) return NO_INIT;
156    status_t ret = p->setMode(mMode);
157    if (ret == NO_ERROR) {
158        ret = p->setDataSource(url);
159    }
160    if (ret == NO_ERROR) mRetriever = p;
161    return ret;
162}
163
164status_t MetadataRetrieverClient::setDataSource(int fd, int64_t offset, int64_t length)
165{
166    LOGV("setDataSource fd=%d, offset=%lld, length=%lld", fd, offset, length);
167    Mutex::Autolock lock(mLock);
168    struct stat sb;
169    int ret = fstat(fd, &sb);
170    if (ret != 0) {
171        LOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
172        return BAD_VALUE;
173    }
174    LOGV("st_dev  = %llu", sb.st_dev);
175    LOGV("st_mode = %u", sb.st_mode);
176    LOGV("st_uid  = %lu", sb.st_uid);
177    LOGV("st_gid  = %lu", sb.st_gid);
178    LOGV("st_size = %llu", sb.st_size);
179
180    if (offset >= sb.st_size) {
181        LOGE("offset (%lld) bigger than file size (%llu)", offset, sb.st_size);
182        ::close(fd);
183        return BAD_VALUE;
184    }
185    if (offset + length > sb.st_size) {
186        length = sb.st_size - offset;
187        LOGV("calculated length = %lld", length);
188    }
189
190    player_type playerType = getPlayerType(fd, offset, length);
191    LOGV("player type = %d", playerType);
192    sp<MediaMetadataRetrieverBase> p = createRetriever(playerType);
193    if (p == NULL) {
194        ::close(fd);
195        return NO_INIT;
196    }
197    status_t status = p->setMode(mMode);
198    if (status == NO_ERROR) {
199        p->setDataSource(fd, offset, length);
200    }
201    if (status == NO_ERROR) mRetriever = p;
202    ::close(fd);
203    return status;
204}
205
206status_t MetadataRetrieverClient::setMode(int mode)
207{
208    LOGV("setMode");
209    Mutex::Autolock lock(mLock);
210    if (mode < METADATA_MODE_NOOP ||
211        mode > METADATA_MODE_FRAME_CAPTURE_AND_METADATA_RETRIEVAL) {
212        LOGE("invalid mode %d", mode);
213        return BAD_VALUE;
214    }
215    mMode = mode;
216    return NO_ERROR;
217}
218
219status_t MetadataRetrieverClient::getMode(int* mode) const
220{
221    LOGV("getMode");
222    Mutex::Autolock lock(mLock);
223
224    // TODO:
225    // This may not be necessary.
226    // If setDataSource() has not been called, return the cached value
227    // otherwise, return the value retrieved from the retriever
228    if (mRetriever == NULL) {
229        *mode = mMode;
230    } else {
231        mRetriever->getMode(mode);
232    }
233    return NO_ERROR;
234}
235
236sp<IMemory> MetadataRetrieverClient::captureFrame()
237{
238    LOGV("captureFrame");
239    Mutex::Autolock lock(mLock);
240    mThumbnail.clear();
241    mThumbnailDealer.clear();
242    if (mRetriever == NULL) {
243        LOGE("retriever is not initialized");
244        return NULL;
245    }
246    VideoFrame *frame = mRetriever->captureFrame();
247    if (frame == NULL) {
248        LOGE("failed to capture a video frame");
249        return NULL;
250    }
251    size_t size = sizeof(VideoFrame) + frame->mSize;
252    mThumbnailDealer = new MemoryDealer(size);
253    if (mThumbnailDealer == NULL) {
254        LOGE("failed to create MemoryDealer");
255        delete frame;
256        return NULL;
257    }
258    mThumbnail = mThumbnailDealer->allocate(size);
259    if (mThumbnail == NULL) {
260        LOGE("not enough memory for VideoFrame size=%u", size);
261        mThumbnailDealer.clear();
262        delete frame;
263        return NULL;
264    }
265    VideoFrame *frameCopy = static_cast<VideoFrame *>(mThumbnail->pointer());
266    frameCopy->mWidth = frame->mWidth;
267    frameCopy->mHeight = frame->mHeight;
268    frameCopy->mDisplayWidth = frame->mDisplayWidth;
269    frameCopy->mDisplayHeight = frame->mDisplayHeight;
270    frameCopy->mSize = frame->mSize;
271    frameCopy->mData = (uint8_t *)frameCopy + sizeof(VideoFrame);
272    memcpy(frameCopy->mData, frame->mData, frame->mSize);
273    delete frame;  // Fix memory leakage
274    return mThumbnail;
275}
276
277sp<IMemory> MetadataRetrieverClient::extractAlbumArt()
278{
279    LOGV("extractAlbumArt");
280    Mutex::Autolock lock(mLock);
281    mAlbumArt.clear();
282    mAlbumArtDealer.clear();
283    if (mRetriever == NULL) {
284        LOGE("retriever is not initialized");
285        return NULL;
286    }
287    MediaAlbumArt *albumArt = mRetriever->extractAlbumArt();
288    if (albumArt == NULL) {
289        LOGE("failed to extract an album art");
290        return NULL;
291    }
292    size_t size = sizeof(MediaAlbumArt) + albumArt->mSize;
293    mAlbumArtDealer = new MemoryDealer(size);
294    if (mAlbumArtDealer == NULL) {
295        LOGE("failed to create MemoryDealer object");
296        delete albumArt;
297        return NULL;
298    }
299    mAlbumArt = mAlbumArtDealer->allocate(size);
300    if (mAlbumArt == NULL) {
301        LOGE("not enough memory for MediaAlbumArt size=%u", size);
302        mAlbumArtDealer.clear();
303        delete albumArt;
304        return NULL;
305    }
306    MediaAlbumArt *albumArtCopy = static_cast<MediaAlbumArt *>(mAlbumArt->pointer());
307    albumArtCopy->mSize = albumArt->mSize;
308    albumArtCopy->mData = (uint8_t *)albumArtCopy + sizeof(MediaAlbumArt);
309    memcpy(albumArtCopy->mData, albumArt->mData, albumArt->mSize);
310    delete albumArt;  // Fix memory leakage
311    return mAlbumArt;
312}
313
314const char* MetadataRetrieverClient::extractMetadata(int keyCode)
315{
316    LOGV("extractMetadata");
317    Mutex::Autolock lock(mLock);
318    if (mRetriever == NULL) {
319        LOGE("retriever is not initialized");
320        return NULL;
321    }
322    return mRetriever->extractMetadata(keyCode);
323}
324
325}; // namespace android
326