MPEG4Writer(const char *filename);
MPEG4Writer(int fd);
+ // Limitations
+ // 1. No more than 2 tracks can be added
+ // 2. Only video or audio source can be added
+ // 3. No more than one video and/or one audio source can be added.
virtual status_t addSource(const sp<MediaSource> &source);
+
+ // Returns INVALID_OPERATION if there is no source or track.
virtual status_t start(MetaData *param = NULL);
virtual status_t stop() { return reset(); }
virtual status_t pause();
ALOGE("Attempt to add source AFTER recording is started");
return UNKNOWN_ERROR;
}
+
+ // At most 2 tracks can be supported.
+ if (mTracks.size() >= 2) {
+ ALOGE("Too many tracks (%d) to add", mTracks.size());
+ return ERROR_UNSUPPORTED;
+ }
+
+ CHECK(source.get() != NULL);
+
+ // A track of type other than video or audio is not supported.
+ const char *mime;
+ source->getFormat()->findCString(kKeyMIMEType, &mime);
+ bool isAudio = !strncasecmp(mime, "audio/", 6);
+ bool isVideo = !strncasecmp(mime, "video/", 6);
+ if (!isAudio && !isVideo) {
+ ALOGE("Track (%s) other than video or audio is not supported",
+ mime);
+ return ERROR_UNSUPPORTED;
+ }
+
+ // At this point, we know the track to be added is either
+ // video or audio. Thus, we only need to check whether it
+ // is an audio track or not (if it is not, then it must be
+ // a video track).
+
+ // No more than one video or one audio track is supported.
+ for (List<Track*>::iterator it = mTracks.begin();
+ it != mTracks.end(); ++it) {
+ if ((*it)->isAudio() == isAudio) {
+ ALOGE("%s track already exists", isAudio? "Audio": "Video");
+ return ERROR_UNSUPPORTED;
+ }
+ }
+
+ // This is the first track of either audio or video.
+ // Go ahead to add the track.
Track *track = new Track(this, source, 1 + mTracks.size());
mTracks.push_back(track);
}
status_t MPEG4Writer::startTracks(MetaData *params) {
+ if (mTracks.empty()) {
+ ALOGE("No source added");
+ return INVALID_OPERATION;
+ }
+
for (List<Track *>::iterator it = mTracks.begin();
it != mTracks.end(); ++it) {
status_t err = (*it)->start(params);
convertMessageToMetaData(format, meta);
sp<MediaAdapter> newTrack = new MediaAdapter(meta);
- return mTrackList.add(newTrack);
+ status_t result = mWriter->addSource(newTrack);
+ if (result == OK) {
+ return mTrackList.add(newTrack);
+ }
+ return -1;
}
status_t MediaMuxer::start() {
Mutex::Autolock autoLock(mMuxerLock);
-
if (mState == INITED) {
mState = STARTED;
- for (size_t i = 0 ; i < mTrackList.size(); i++) {
- mWriter->addSource(mTrackList[i]);
- }
return mWriter->start();
} else {
ALOGE("start() is called in invalid state %d", mState);
if (mState == STARTED) {
mState = STOPPED;
for (size_t i = 0; i < mTrackList.size(); i++) {
- mTrackList[i]->stop();
+ if (mTrackList[i]->stop() != OK) {
+ return INVALID_OPERATION;
+ }
}
return mWriter->stop();
} else {