MetadataRetrieverClient.cpp revision 77342f72fdf96603938a95fcbb9888ec90e71e68 
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 <dirent.h>
25#include <unistd.h>
26
27#include <string.h>
28#include <cutils/atomic.h>
29#include <cutils/properties.h>
30#include <binder/MemoryBase.h>
31#include <binder/MemoryHeapBase.h>
32#include <binder/IPCThreadState.h>
33#include <binder/IServiceManager.h>
34#include <media/IMediaHTTPService.h>
35#include <media/MediaMetadataRetrieverInterface.h>
36#include <media/MediaPlayerInterface.h>
37#include <private/media/VideoFrame.h>
38#include "MidiMetadataRetriever.h"
39#include "MetadataRetrieverClient.h"
40#include "StagefrightMetadataRetriever.h"
41#include "MediaPlayerFactory.h"
42
43namespace android {
44
45MetadataRetrieverClient::MetadataRetrieverClient(pid_t pid)
46{
47    ALOGV("MetadataRetrieverClient constructor pid(%d)", pid);
48    mPid = pid;
49    mThumbnail = NULL;
50    mAlbumArt = NULL;
51    mRetriever = NULL;
52}
53
54MetadataRetrieverClient::~MetadataRetrieverClient()
55{
56    ALOGV("MetadataRetrieverClient destructor");
57    disconnect();
58}
59
60status_t MetadataRetrieverClient::dump(int fd, const Vector<String16>& args) const
61{
62    const size_t SIZE = 256;
63    char buffer[SIZE];
64    String8 result;
65    result.append(" MetadataRetrieverClient\n");
66    snprintf(buffer, 255, "  pid(%d)\n", mPid);
67    result.append(buffer);
68    write(fd, result.string(), result.size());
69    write(fd, "\n", 1);
70    return NO_ERROR;
71}
72
73void MetadataRetrieverClient::disconnect()
74{
75    ALOGV("disconnect from pid %d", mPid);
76    Mutex::Autolock lock(mLock);
77    mRetriever.clear();
78    mThumbnail.clear();
79    mAlbumArt.clear();
80    IPCThreadState::self()->flushCommands();
81}
82
83static sp<MediaMetadataRetrieverBase> createRetriever(player_type playerType)
84{
85    sp<MediaMetadataRetrieverBase> p;
86    switch (playerType) {
87        case STAGEFRIGHT_PLAYER:
88        case NU_PLAYER:
89        {
90            p = new StagefrightMetadataRetriever;
91            break;
92        }
93        case SONIVOX_PLAYER:
94            ALOGV("create midi metadata retriever");
95            p = new MidiMetadataRetriever();
96            break;
97        default:
98            // TODO:
99            // support for TEST_PLAYER
100            ALOGE("player type %d is not supported",  playerType);
101            break;
102    }
103    if (p == NULL) {
104        ALOGE("failed to create a retriever object");
105    }
106    return p;
107}
108
109status_t MetadataRetrieverClient::setDataSource(
110        const sp<IMediaHTTPService> &httpService,
111        const char *url,
112        const KeyedVector<String8, String8> *headers)
113{
114    ALOGV("setDataSource(%s)", url);
115    Mutex::Autolock lock(mLock);
116    if (url == NULL) {
117        return UNKNOWN_ERROR;
118    }
119
120    // When asking the MediaPlayerFactory subsystem to choose a media player for
121    // a given URL, a pointer to an outer IMediaPlayer can be passed to the
122    // factory system to be taken into consideration along with the URL.  In the
123    // case of choosing an instance of a MediaPlayerBase for a
124    // MetadataRetrieverClient, there is no outer IMediaPlayer which will
125    // eventually encapsulate the result of this selection.  In this case, just
126    // pass NULL to getPlayerType to indicate that there is no outer
127    // IMediaPlayer to consider during selection.
128    player_type playerType =
129        MediaPlayerFactory::getPlayerType(NULL /* client */, url);
130    ALOGV("player type = %d", playerType);
131    sp<MediaMetadataRetrieverBase> p = createRetriever(playerType);
132    if (p == NULL) return NO_INIT;
133    status_t ret = p->setDataSource(httpService, url, headers);
134    if (ret == NO_ERROR) mRetriever = p;
135    return ret;
136}
137
138status_t MetadataRetrieverClient::setDataSource(int fd, int64_t offset, int64_t length)
139{
140    ALOGV("setDataSource fd=%d, offset=%lld, length=%lld", fd, offset, length);
141    Mutex::Autolock lock(mLock);
142    struct stat sb;
143    int ret = fstat(fd, &sb);
144    if (ret != 0) {
145        ALOGE("fstat(%d) failed: %d, %s", fd, ret, strerror(errno));
146        return BAD_VALUE;
147    }
148    ALOGV("st_dev  = %llu", sb.st_dev);
149    ALOGV("st_mode = %u", sb.st_mode);
150    ALOGV("st_uid  = %lu", static_cast<unsigned long>(sb.st_uid));
151    ALOGV("st_gid  = %lu", static_cast<unsigned long>(sb.st_gid));
152    ALOGV("st_size = %llu", sb.st_size);
153
154    if (offset >= sb.st_size) {
155        ALOGE("offset (%lld) bigger than file size (%llu)", offset, sb.st_size);
156        ::close(fd);
157        return BAD_VALUE;
158    }
159    if (offset + length > sb.st_size) {
160        length = sb.st_size - offset;
161        ALOGV("calculated length = %lld", length);
162    }
163
164    player_type playerType =
165        MediaPlayerFactory::getPlayerType(NULL /* client */,
166                                          fd,
167                                          offset,
168                                          length);
169    ALOGV("player type = %d", playerType);
170    sp<MediaMetadataRetrieverBase> p = createRetriever(playerType);
171    if (p == NULL) {
172        ::close(fd);
173        return NO_INIT;
174    }
175    status_t status = p->setDataSource(fd, offset, length);
176    if (status == NO_ERROR) mRetriever = p;
177    ::close(fd);
178    return status;
179}
180
181sp<IMemory> MetadataRetrieverClient::getFrameAtTime(int64_t timeUs, int option)
182{
183    ALOGV("getFrameAtTime: time(%lld us) option(%d)", timeUs, option);
184    Mutex::Autolock lock(mLock);
185    mThumbnail.clear();
186    if (mRetriever == NULL) {
187        ALOGE("retriever is not initialized");
188        return NULL;
189    }
190    VideoFrame *frame = mRetriever->getFrameAtTime(timeUs, option);
191    if (frame == NULL) {
192        ALOGE("failed to capture a video frame");
193        return NULL;
194    }
195    size_t size = sizeof(VideoFrame) + frame->mSize;
196    sp<MemoryHeapBase> heap = new MemoryHeapBase(size, 0, "MetadataRetrieverClient");
197    if (heap == NULL) {
198        ALOGE("failed to create MemoryDealer");
199        delete frame;
200        return NULL;
201    }
202    mThumbnail = new MemoryBase(heap, 0, size);
203    if (mThumbnail == NULL) {
204        ALOGE("not enough memory for VideoFrame size=%u", size);
205        delete frame;
206        return NULL;
207    }
208    VideoFrame *frameCopy = static_cast<VideoFrame *>(mThumbnail->pointer());
209    frameCopy->mWidth = frame->mWidth;
210    frameCopy->mHeight = frame->mHeight;
211    frameCopy->mDisplayWidth = frame->mDisplayWidth;
212    frameCopy->mDisplayHeight = frame->mDisplayHeight;
213    frameCopy->mSize = frame->mSize;
214    frameCopy->mRotationAngle = frame->mRotationAngle;
215    ALOGV("rotation: %d", frameCopy->mRotationAngle);
216    frameCopy->mData = (uint8_t *)frameCopy + sizeof(VideoFrame);
217    memcpy(frameCopy->mData, frame->mData, frame->mSize);
218    delete frame;  // Fix memory leakage
219    return mThumbnail;
220}
221
222sp<IMemory> MetadataRetrieverClient::extractAlbumArt()
223{
224    ALOGV("extractAlbumArt");
225    Mutex::Autolock lock(mLock);
226    mAlbumArt.clear();
227    if (mRetriever == NULL) {
228        ALOGE("retriever is not initialized");
229        return NULL;
230    }
231    MediaAlbumArt *albumArt = mRetriever->extractAlbumArt();
232    if (albumArt == NULL) {
233        ALOGE("failed to extract an album art");
234        return NULL;
235    }
236    size_t size = sizeof(MediaAlbumArt) + albumArt->size();
237    sp<MemoryHeapBase> heap = new MemoryHeapBase(size, 0, "MetadataRetrieverClient");
238    if (heap == NULL) {
239        ALOGE("failed to create MemoryDealer object");
240        delete albumArt;
241        return NULL;
242    }
243    mAlbumArt = new MemoryBase(heap, 0, size);
244    if (mAlbumArt == NULL) {
245        ALOGE("not enough memory for MediaAlbumArt size=%u", size);
246        delete albumArt;
247        return NULL;
248    }
249    MediaAlbumArt::init((MediaAlbumArt *) mAlbumArt->pointer(),
250                        albumArt->size(), albumArt->data());
251    delete albumArt;  // We've taken our copy.
252    return mAlbumArt;
253}
254
255const char* MetadataRetrieverClient::extractMetadata(int keyCode)
256{
257    ALOGV("extractMetadata");
258    Mutex::Autolock lock(mLock);
259    if (mRetriever == NULL) {
260        ALOGE("retriever is not initialized");
261        return NULL;
262    }
263    return mRetriever->extractMetadata(keyCode);
264}
265
266}; // namespace android
267