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_NDEBUG 0
19 #define LOG_TAG "MidiMetadataRetriever"
20 #include <utils/Log.h>
21
22 #include "MidiMetadataRetriever.h"
23 #include <media/mediametadataretriever.h>
24
25 namespace android {
26
27 static status_t ERROR_NOT_OPEN = -1;
28 static status_t ERROR_OPEN_FAILED = -2;
29 static status_t ERROR_EAS_FAILURE = -3;
30 static status_t ERROR_ALLOCATE_FAILED = -4;
31
clearMetadataValues()32 void MidiMetadataRetriever::clearMetadataValues()
33 {
34 LOGV("clearMetadataValues");
35 mMetadataValues[0][0] = '\0';
36 }
37
setDataSource(const char * url)38 status_t MidiMetadataRetriever::setDataSource(const char *url)
39 {
40 LOGV("setDataSource: %s", url? url: "NULL pointer");
41 Mutex::Autolock lock(mLock);
42 clearMetadataValues();
43 if (mMidiPlayer == 0) {
44 mMidiPlayer = new MidiFile();
45 }
46 return mMidiPlayer->setDataSource(url);
47 }
48
setDataSource(int fd,int64_t offset,int64_t length)49 status_t MidiMetadataRetriever::setDataSource(int fd, int64_t offset, int64_t length)
50 {
51 LOGV("setDataSource: fd(%d), offset(%lld), and length(%lld)", fd, offset, length);
52 Mutex::Autolock lock(mLock);
53 clearMetadataValues();
54 if (mMidiPlayer == 0) {
55 mMidiPlayer = new MidiFile();
56 }
57 return mMidiPlayer->setDataSource(fd, offset, length);;
58 }
59
extractMetadata(int keyCode)60 const char* MidiMetadataRetriever::extractMetadata(int keyCode)
61 {
62 LOGV("extractMetdata: key(%d)", keyCode);
63 Mutex::Autolock lock(mLock);
64 if (mMidiPlayer == 0 || mMidiPlayer->initCheck() != NO_ERROR) {
65 LOGE("Midi player is not initialized yet");
66 return NULL;
67 }
68 switch (keyCode) {
69 case METADATA_KEY_DURATION:
70 {
71 if (mMetadataValues[0][0] == '\0') {
72 int duration = -1;
73 if (mMidiPlayer->getDuration(&duration) != NO_ERROR) {
74 LOGE("failed to get duration");
75 return NULL;
76 }
77 snprintf(mMetadataValues[0], MAX_METADATA_STRING_LENGTH, "%d", duration);
78 }
79
80 LOGV("duration: %s ms", mMetadataValues[0]);
81 return mMetadataValues[0];
82 }
83 default:
84 LOGE("Unsupported key code (%d)", keyCode);
85 return NULL;
86 }
87 return NULL;
88 }
89
90 };
91
92