jobjectArray Java_org_videolan_libvlc_LibVLC_readTracksInfo(JNIEnv *env, jobject thiz,
jlong instance, jstring mrl)
{
/* Create a new item and assign it to the media player. */
libvlc_media_t *p_m = new_media(instance, env, thiz, mrl, false, false);
if (p_m == NULL)
{
LOGE("Could not create the media!");
return NULL;
}
libvlc_media_parse(p_m);
jobjectArray jar = read_track_info_internal(env, thiz, p_m);
libvlc_media_release(p_m);
return jar;
}
jboolean Java_org_videolan_libvlc_LibVLC_hasVideoTrack(JNIEnv *env, jobject thiz,
jlong i_instance, jstring fileLocation)
{
/* Create a new item and assign it to the media player. */
libvlc_media_t *p_m = new_media(i_instance, env, thiz, fileLocation, false, false);
if (p_m == NULL)
{
LOGE("Could not create the media!");
return JNI_FALSE;
}
/* Get the tracks information of the media. */
libvlc_media_parse(p_m);
libvlc_media_player_t* p_mp = libvlc_media_player_new_from_media(p_m);
libvlc_media_player_set_video_title_display(p_mp, libvlc_position_disable, 0);
struct length_change_monitor* monitor;
monitor = malloc(sizeof(struct length_change_monitor));
if (!monitor) return 0;
/* Initialize pthread variables. */
pthread_mutex_init(&monitor->doneMutex, NULL);
pthread_cond_init(&monitor->doneCondVar, NULL);
monitor->length_changed = false;
libvlc_event_manager_t *ev = libvlc_media_player_event_manager(p_mp);
libvlc_event_attach(ev, libvlc_MediaPlayerLengthChanged, length_changed_callback, monitor);
libvlc_media_player_play( p_mp );
pthread_mutex_lock(&monitor->doneMutex);
struct timespec deadline;
clock_gettime(CLOCK_REALTIME, &deadline);
deadline.tv_sec += 2; /* If "VLC can't open the file", return */
int mp_alive = 1;
while( !monitor->length_changed && mp_alive ) {
pthread_cond_timedwait(&monitor->doneCondVar, &monitor->doneMutex, &deadline);
mp_alive = libvlc_media_player_will_play(p_mp);
}
pthread_mutex_unlock(&monitor->doneMutex);
int i_nbTracks;
if( mp_alive )
i_nbTracks = libvlc_video_get_track_count(p_mp);
else
i_nbTracks = -1;
LOGI("Number of video tracks: %d",i_nbTracks);
libvlc_event_detach(ev, libvlc_MediaPlayerLengthChanged, length_changed_callback, monitor);
libvlc_media_player_stop(p_mp);
libvlc_media_player_release(p_mp);
libvlc_media_release(p_m);
pthread_mutex_destroy(&monitor->doneMutex);
pthread_cond_destroy(&monitor->doneCondVar);
free(monitor);
if(i_nbTracks > 0)
return JNI_TRUE;
else if(i_nbTracks < 0)
(*env)->ThrowNew(env, (*env)->FindClass(env, "java/io/IOException"), "VLC can't open the file");
else
return JNI_FALSE;
}
/**
* Thumbnailer main function.
* return null if the thumbail generation failed.
**/
jbyteArray Java_org_videolan_vlc_LibVLC_getThumbnail(JNIEnv *env, jobject thiz,
jint instance, jstring filePath,
jint width, jint height)
{
libvlc_instance_t *libvlc = (libvlc_instance_t *)instance;
jbyteArray byteArray = NULL;
/* Create the thumbnailer data structure */
thumbnailer_sys_t *sys = calloc(1, sizeof(thumbnailer_sys_t));
if (sys == NULL)
{
LOGE("Couldn't create the thumbnailer data structure!");
return NULL;
}
/* Initialize the barrier. */
pthread_mutex_init(&sys->doneMutex, NULL);
pthread_cond_init(&sys->doneCondVar, NULL);
/* Create a media player playing environment */
sys->mp = libvlc_media_player_new(libvlc);
libvlc_media_t *m = new_media(instance, env, thiz, filePath);
if (m == NULL)
{
LOGE("Couldn't create the media to play!");
goto end;
}
libvlc_media_add_option( m, ":no-audio" );
libvlc_media_player_set_media(sys->mp, m);
libvlc_media_release(m);
/* Get the size of the video with the tracks information of the media. */
libvlc_media_track_info_t *tracks;
libvlc_media_parse(m);
int nbTracks = libvlc_media_get_tracks_info(m, &tracks);
unsigned i, videoWidth, videoHeight;
bool hasVideoTrack = false;
for (i = 0; i < nbTracks; ++i)
if (tracks[i].i_type == libvlc_track_video)
{
videoWidth = tracks[i].u.video.i_width;
videoHeight = tracks[i].u.video.i_height;
hasVideoTrack = true;
break;
}
free(tracks);
/* Abord if we have not found a video track. */
if (!hasVideoTrack)
{
LOGE("Could not find a video track in this file.\n");
goto end;
}
/* Compute the size parameters of the frame to generate. */
unsigned picWidth = width;
unsigned picHeight = height;
float videoAR = (float)videoWidth / videoHeight;
float screenAR = (float)width / height;
if (screenAR < videoAR)
{
picHeight = (float)width / videoAR;
sys->thumbnailOffset = (height - picHeight) / 2 * width * PIXEL_SIZE;
}
else
{
picWidth = (float)height * videoAR;
sys->thumbnailOffset = (width - picWidth) / 2 * PIXEL_SIZE;
}
sys->picPitch = picWidth * PIXEL_SIZE;
sys->lineSize = width * PIXEL_SIZE;
sys->nbLines = picHeight;
/* Allocate the memory to store the frames. */
unsigned picSize = sys->picPitch * picHeight;
sys->frameData = malloc(picSize);
if (sys->frameData == NULL)
{
LOGE("Couldn't allocate the memory to store the frame!");
goto end;
}
/* Allocate the memory to store the thumbnail. */
unsigned thumbnailSize = width * height * PIXEL_SIZE;
sys->thumbnail = calloc(thumbnailSize, 1);
if (sys->thumbnail == NULL)
{
LOGE("Couldn't allocate the memory to store the thumbnail!");
goto end;
}
/* Set the video format and the callbacks. */
libvlc_video_set_format(sys->mp, "RGBA", picWidth, picHeight, sys->picPitch);
libvlc_video_set_callbacks(sys->mp, thumbnailer_lock, thumbnailer_unlock,
NULL, (void*)sys);
/* Play the media. */
libvlc_media_player_play(sys->mp);
libvlc_media_player_set_position(sys->mp, THUMBNAIL_POSITION);
/* Wait for the thumbnail to be generated. */
pthread_mutex_lock(&sys->doneMutex);
while (!sys->hasThumb)
pthread_cond_wait(&sys->doneCondVar, &sys->doneMutex);
pthread_mutex_unlock(&sys->doneMutex);
/* Stop and realease the media player. */
libvlc_media_player_stop(sys->mp);
libvlc_media_player_release(sys->mp);
/* Create the Java byte array to return the create thumbnail. */
byteArray = (*env)->NewByteArray(env, thumbnailSize);
if (byteArray == NULL)
{
LOGE("Couldn't allocate the Java byte array to store the frame!");
goto end;
}
(*env)->SetByteArrayRegion(env, byteArray, 0, thumbnailSize,
(jbyte *)sys->thumbnail);
(*env)->DeleteLocalRef(env, byteArray);
end:
pthread_mutex_destroy(&sys->doneMutex);
pthread_cond_destroy(&sys->doneCondVar);
free(sys->thumbnail);
free(sys->frameData);
free(sys);
return byteArray;
}
SCSI_MEDIA
new_scsi_media(void)
{
return (SCSI_MEDIA) new_media(sizeof(struct SCSI_media));
}
/**
* Thumbnailer main function.
* return null if the thumbail generation failed.
**/
jbyteArray Java_org_videolan_libvlc_LibVLC_getThumbnail(JNIEnv *env, jobject thiz,
jlong instance, jstring filePath,
const jint frameWidth, const jint frameHeight)
{
libvlc_instance_t *libvlc = (libvlc_instance_t *)(intptr_t)instance;
jbyteArray byteArray = NULL;
/* Create the thumbnailer data structure */
thumbnailer_sys_t *sys = calloc(1, sizeof(thumbnailer_sys_t));
if (sys == NULL)
{
LOGE("Could not create the thumbnailer data structure!");
goto enomem;
}
/* Initialize the barrier. */
pthread_mutex_init(&sys->doneMutex, NULL);
pthread_cond_init(&sys->doneCondVar, NULL);
/* Create a media player playing environment */
libvlc_media_player_t *mp = libvlc_media_player_new(libvlc);
libvlc_media_player_set_video_title_display(mp, libvlc_position_disable, 0);
libvlc_media_t *m = new_media(instance, env, thiz, filePath, true, false);
if (m == NULL)
{
LOGE("Could not create the media to play!");
goto end;
}
/* Fast and no options */
libvlc_media_add_option( m, ":no-audio" );
libvlc_media_add_option( m, ":no-spu" );
libvlc_media_add_option( m, ":no-osd" );
libvlc_media_player_set_media(mp, m);
/* Get the size of the video with the tracks information of the media. */
libvlc_media_track_t **tracks;
libvlc_media_parse(m);
int nbTracks = libvlc_media_tracks_get(m, &tracks);
libvlc_media_release(m);
/* Parse the results */
unsigned videoWidth = 0, videoHeight = 0;
bool hasVideoTrack = false;
for (unsigned i = 0; i < nbTracks; ++i)
if (tracks[i]->i_type == libvlc_track_video)
{
videoWidth = tracks[i]->video->i_width;
videoHeight = tracks[i]->video->i_height;
hasVideoTrack = true;
break;
}
libvlc_media_tracks_release(tracks, nbTracks);
/* Abort if we have not found a video track. */
if (!hasVideoTrack)
{
LOGE("Could not find any video track in this file.\n");
goto end;
}
LOGD("Video dimensions: %ix%i.\n", videoWidth, videoHeight );
/* VLC could not tell us the size */
if( videoWidth == 0 || videoHeight == 0 )
{
LOGE("Could not find the video dimensions.\n");
goto end;
}
if( videoWidth < THUMBNAIL_MIN_WIDTH || videoHeight < THUMBNAIL_MIN_HEIGHT
|| videoWidth > THUMBNAIL_MAX_WIDTH || videoHeight > THUMBNAIL_MAX_HEIGHT )
{
LOGE("Wrong video dimensions.\n");
goto end;
}
/* Compute the size parameters of the frame to generate. */
unsigned thumbWidth = frameWidth;
unsigned thumbHeight = frameHeight;
const float inputAR = (float)videoWidth / videoHeight;
const float screenAR = (float)frameWidth / frameHeight;
/* Most of the cases, video is wider than tall */
if (screenAR < inputAR)
{
thumbHeight = (float)frameWidth / inputAR + 1;
sys->blackBorders = ( (frameHeight - thumbHeight) / 2 ) * frameWidth;
}
else
{
LOGD("Weird aspect Ratio.\n");
thumbWidth = (float)frameHeight * inputAR;
sys->blackBorders = (frameWidth - thumbWidth) / 2;
}
sys->thumbPitch = thumbWidth * PIXEL_SIZE;
sys->thumbHeight = thumbHeight;
sys->frameWidth = frameWidth;
/* Allocate the memory to store the frames. */
size_t thumbSize = sys->thumbPitch * (sys->thumbHeight+1);
sys->thumbData = malloc(thumbSize);
if (sys->thumbData == NULL)
{
LOGE("Could not allocate the memory to store the frame!");
goto end;
}
/* Allocate the memory to store the thumbnail. */
unsigned frameSize = frameWidth * frameHeight * PIXEL_SIZE;
sys->frameData = calloc(frameSize, 1);
if (sys->frameData == NULL)
{
LOGE("Could not allocate the memory to store the thumbnail!");
goto end;
}
/* Set the video format and the callbacks. */
libvlc_video_set_format(mp, "RGBA", thumbWidth, thumbHeight, sys->thumbPitch);
libvlc_video_set_callbacks(mp, thumbnailer_lock, thumbnailer_unlock,
NULL, (void*)sys);
sys->state = THUMB_SEEKING;
/* Play the media. */
libvlc_media_player_play(mp);
libvlc_media_player_set_position(mp, THUMBNAIL_POSITION);
const int wait_time = 50000;
const int max_attempts = 100;
for (int i = 0; i < max_attempts; ++i) {
if (libvlc_media_player_is_playing(mp) && libvlc_media_player_get_position(mp) >= THUMBNAIL_POSITION)
break;
usleep(wait_time);
}
/* Wait for the thumbnail to be generated. */
pthread_mutex_lock(&sys->doneMutex);
sys->state = THUMB_SEEKED;
struct timespec deadline;
clock_gettime(CLOCK_REALTIME, &deadline);
deadline.tv_sec += 10; /* amount of seconds before we abort thumbnailer */
do {
int ret = pthread_cond_timedwait(&sys->doneCondVar, &sys->doneMutex, &deadline);
if (ret == ETIMEDOUT)
break;
} while (sys->state != THUMB_DONE);
pthread_mutex_unlock(&sys->doneMutex);
/* Stop and release the media player. */
libvlc_media_player_stop(mp);
libvlc_media_player_release(mp);
if (sys->state == THUMB_DONE) {
/* Create the Java byte array to return the create thumbnail. */
byteArray = (*env)->NewByteArray(env, frameSize);
if (byteArray == NULL)
{
LOGE("Could not allocate the Java byte array to store the frame!");
goto end;
}
(*env)->SetByteArrayRegion(env, byteArray, 0, frameSize,
(jbyte *)sys->frameData);
}
end:
pthread_mutex_destroy(&sys->doneMutex);
pthread_cond_destroy(&sys->doneCondVar);
free(sys->frameData);
free(sys->thumbData);
free(sys);
enomem:
return byteArray;
}
DEBLOCK_MEDIA
new_deblock_media(void)
{
return (DEBLOCK_MEDIA) new_media(sizeof(struct deblock_media));
}
