/*****************************************************************************
* snapshot.c : vout internal snapshot
*****************************************************************************
* Copyright (C) 2009 Laurent Aimar
*
* Authors: Gildas Bazin <gbazin _AT_ videolan _DOT_ org>
* Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <assert.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#include <vlc_common.h>
#include <vlc_configuration.h>
#include <vlc_fs.h>
#include <vlc_strings.h>
#include <vlc_block.h>
#include <vlc_vout.h>
#include "snapshot.h"
#include "vout_internal.h"
struct vout_snapshot {
vlc_mutex_t lock;
vlc_cond_t wait;
bool is_available;
int request_count;
vlc_picture_chain_t pics;
};
vout_snapshot_t *vout_snapshot_New(void)
{
vout_snapshot_t *snap = malloc(sizeof (*snap));
if (unlikely(snap == NULL))
return NULL;
vlc_mutex_init(&snap->lock);
vlc_cond_init(&snap->wait);
snap->is_available = true;
snap->request_count = 0;
vlc_picture_chain_Init( &snap->pics );
return snap;
}
void vout_snapshot_Destroy(vout_snapshot_t *snap)
{
if (snap == NULL)
return;
while ( !vlc_picture_chain_IsEmpty( &snap->pics ) ) {
picture_t *picture = vlc_picture_chain_PopFront( &snap->pics );
picture_Release(picture);
}
free(snap);
}
void vout_snapshot_End(vout_snapshot_t *snap)
{
if (snap == NULL)
return;
vlc_mutex_lock(&snap->lock);
snap->is_available = false;
vlc_cond_broadcast(&snap->wait);
vlc_mutex_unlock(&snap->lock);
}
/* */
picture_t *vout_snapshot_Get(vout_snapshot_t *snap, vlc_tick_t timeout)
{
if (snap == NULL)
return NULL;
const vlc_tick_t deadline = vlc_tick_now() + timeout;
vlc_mutex_lock(&snap->lock);
/* */
snap->request_count++;
/* */
while (snap->is_available && vlc_picture_chain_IsEmpty( &snap->pics ) &&
vlc_cond_timedwait(&snap->wait, &snap->lock, deadline) == 0);
/* */
picture_t *picture = vlc_picture_chain_PopFront( &snap->pics );
if (!picture && snap->request_count > 0)
snap->request_count--;
vlc_mutex_unlock(&snap->lock);
return picture;
}
bool vout_snapshot_IsRequested(vout_snapshot_t *snap)
{
if (snap == NULL)
return false;
bool has_request = false;
if (!vlc_mutex_trylock(&snap->lock)) {
has_request = snap->request_count > 0;
vlc_mutex_unlock(&snap->lock);
}
return has_request;
}
void vout_snapshot_Set(vout_snapshot_t *snap,
const video_format_t *fmt,
picture_t *picture)
{
if (snap == NULL)
return;
if (!fmt)
fmt = &picture->format;
vlc_mutex_lock(&snap->lock);
while (snap->request_count > 0) {
picture_t *dup = picture_Clone(picture);
if (!dup)
break;
video_format_CopyCrop( &dup->format, fmt );
vlc_picture_chain_Append( &snap->pics, dup );
snap->request_count--;
}
vlc_cond_broadcast(&snap->wait);
vlc_mutex_unlock(&snap->lock);
}
/* */
char *vout_snapshot_GetDirectory(void)
{
return config_GetUserDir(VLC_SNAPSHOTS_DIR);
}
/* */
int vout_snapshot_SaveImage(char **name, int *sequential,
const block_t *image,
vout_thread_t *p_vout,
const vout_snapshot_save_cfg_t *cfg)
{
/* */
char *filename;
/* */
char *prefix = NULL;
if (cfg->prefix_fmt)
prefix = str_format(NULL, NULL, cfg->prefix_fmt);
if (prefix)
filename_sanitize(prefix);
else {
prefix = strdup("vlcsnap-");
if (prefix == NULL)
goto error;
}
struct stat st;
bool b_is_folder = false;
if ( vlc_stat( cfg->path, &st ) == 0 )
b_is_folder = S_ISDIR( st.st_mode );
if ( b_is_folder ) {
if (cfg->is_sequential) {
for (int num = cfg->sequence; ; num++) {
if (asprintf(&filename, "%s" DIR_SEP "%s%05d.%s",
cfg->path, prefix, num, cfg->format) < 0) {
free(prefix);
goto error;
}
if (vlc_stat(filename, &st)) {
*sequential = num;
break;
}
free(filename);
}
} else {
struct timespec ts;
struct tm curtime;
char buffer[128];
timespec_get(&ts, TIME_UTC);
if (localtime_r(&ts.tv_sec, &curtime) == NULL)
gmtime_r(&ts.tv_sec, &curtime);
if (strftime(buffer, sizeof(buffer), "%Y-%m-%d-%Hh%Mm%Ss",
&curtime) == 0)
strcpy(buffer, "error");
if (asprintf(&filename, "%s" DIR_SEP "%s%s%03lu.%s",
cfg->path, prefix, buffer, ts.tv_nsec / 1000000,
cfg->format) < 0)
filename = NULL;
}
} else {
filename = strdup( cfg->path );
}
free(prefix);
if (!filename)
goto error;
/* Save the snapshot */
FILE *file = vlc_fopen(filename, "wb");
if (!file) {
msg_Err(p_vout, "Failed to open '%s'", filename);
free(filename);
goto error;
}
if (fwrite(image->p_buffer, image->i_buffer, 1, file) != 1) {
msg_Err(p_vout, "Failed to write to '%s'", filename);
fclose(file);
free(filename);
goto error;
}
fclose(file);
/* */
if (name)
*name = filename;
else
free(filename);
return VLC_SUCCESS;
error:
msg_Err(p_vout, "could not save snapshot");
return VLC_EGENERIC;
}
¤ Dauer der Verarbeitung: 0.1 Sekunden
(vorverarbeitet am 2026-11-04)
¤
*© Formatika GbR, Deutschland
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