gboolean tumbler_util_guess_is_sparse (TumblerFileInfo *info)
{
gchar *filename;
struct stat sb;
gboolean ret_val = FALSE;
g_return_val_if_fail (TUMBLER_IS_FILE_INFO (info), FALSE);
filename = g_filename_from_uri (tumbler_file_info_get_uri (info), NULL, NULL);
if (G_LIKELY(filename))
{
stat (filename, &sb);
g_free (filename);
/* Test sparse files on regular ones */
if (S_ISREG (sb.st_mode))
{
if (((TUMBLER_STAT_BLKSIZE * sb.st_blocks) / sb.st_size) < 0.8)
{
ret_val = TRUE;
}
}
}
return ret_val;
}
static void
jpeg_thumbnailer_create (TumblerAbstractThumbnailer *thumbnailer,
GCancellable *cancellable,
TumblerFileInfo *info)
{
TumblerThumbnailFlavor *flavor;
TumblerImageData data;
TumblerThumbnail *thumbnail;
struct stat statb;
const gchar *uri;
GdkPixbuf *pixbuf = NULL;
gboolean streaming_needed = TRUE;
JOCTET *content;
GError *error = NULL;
GFile *file;
gchar *path;
gsize length;
gint fd;
gint height;
gint width;
gint size;
g_return_if_fail (IS_JPEG_THUMBNAILER (thumbnailer));
g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
g_return_if_fail (TUMBLER_IS_FILE_INFO (info));
/* do nothing if cancelled */
if (g_cancellable_is_cancelled (cancellable))
return;
uri = tumbler_file_info_get_uri (info);
/* try to open the source file for reading */
file = g_file_new_for_uri (uri);
thumbnail = tumbler_file_info_get_thumbnail (info);
g_assert (thumbnail != NULL);
flavor = tumbler_thumbnail_get_flavor (thumbnail);
g_assert (flavor != NULL);
tumbler_thumbnail_flavor_get_size (flavor, &width, &height);
size = MIN (width, height);
#ifdef HAVE_MMAP
if (g_file_is_native (file))
{
path = g_file_get_path (file);
/* try to open the file at the given path */
fd = open (path, O_RDONLY);
if (G_LIKELY (fd >= 0))
{
/* determine the status of the file */
if (G_LIKELY (fstat (fd, &statb) == 0 && statb.st_size > 0))
{
/* try to mmap the file */
content = (JOCTET *) mmap (NULL, statb.st_size, PROT_READ,
MAP_SHARED, fd, 0);
/* verify whether the mmap was successful */
if (G_LIKELY (content != (JOCTET *) MAP_FAILED))
{
/* try to load the embedded thumbnail first */
pixbuf = tvtj_jpeg_load_thumbnail (content, statb.st_size, size);
if (pixbuf == NULL)
{
/* fall back to loading and scaling the image itself */
pixbuf = tvtj_jpeg_load (content, statb.st_size, size);
if (pixbuf == NULL)
{
g_set_error (&error, TUMBLER_ERROR,
TUMBLER_ERROR_INVALID_FORMAT,
_("Thumbnail could not be inferred from file contents"));
}
}
/* we have successfully mmapped the file. we may not have
* a thumbnail but trying to read the image from a stream
* won't help us here, so we don't need to attempt streaming
* as a fallback */
streaming_needed = FALSE;
}
/* unmap the file content */
munmap ((void *) content, statb.st_size);
}
/* close the file */
close (fd);
}
g_free (path);
}
#endif
if (streaming_needed)
{
g_file_load_contents (file, cancellable, (gchar **)&content, &length,
NULL, &error);
if (error == NULL)
{
pixbuf = tvtj_jpeg_load_thumbnail (content, length, size);
if (pixbuf == NULL)
{
pixbuf = tvtj_jpeg_load (content, length, size);
if (pixbuf == NULL)
{
g_set_error (&error, TUMBLER_ERROR, TUMBLER_ERROR_INVALID_FORMAT,
_("Thumbnail could not be inferred from file contents"));
}
}
}
}
/* either we have an error now or we have a valid thumbnail pixbuf */
g_assert (error != NULL || pixbuf != NULL);
if (pixbuf != NULL)
{
data.data = gdk_pixbuf_get_pixels (pixbuf);
data.has_alpha = gdk_pixbuf_get_has_alpha (pixbuf);
data.bits_per_sample = gdk_pixbuf_get_bits_per_sample (pixbuf);
data.width = gdk_pixbuf_get_width (pixbuf);
data.height = gdk_pixbuf_get_height (pixbuf);
data.rowstride = gdk_pixbuf_get_rowstride (pixbuf);
data.colorspace = (TumblerColorspace) gdk_pixbuf_get_colorspace (pixbuf);
tumbler_thumbnail_save_image_data (thumbnail, &data,
tumbler_file_info_get_mtime (info),
NULL, &error);
g_object_unref (pixbuf);
}
if (error != NULL)
{
g_signal_emit_by_name (thumbnailer, "error", uri, error->code, error->message);
g_error_free (error);
}
else
{
g_signal_emit_by_name (thumbnailer, "ready", uri);
}
g_object_unref (flavor);
g_object_unref (thumbnail);
g_object_unref (file);
}
/*
* get uri
* create playbin
* check that we have video
* for each potential location
* check for cancel
* grab snapshot
* interesting?
* return if so, other spin loop
*
* for future, check metadata for artwork and don't reject non-video streams (see totem)
*
* TODO: all error paths leak
*/
static void
gst_thumbnailer_create (TumblerAbstractThumbnailer *thumbnailer,
GCancellable *cancellable,
TumblerFileInfo *info)
{
/* These positions are taken from Totem */
const double positions[] = {
1.0 / 3.0,
2.0 / 3.0,
0.1,
0.9,
0.5
};
GstElement *playbin;
gint64 duration;
unsigned int i;
GstBuffer *frame;
GdkPixbuf *shot;
TumblerThumbnail *thumbnail;
TumblerThumbnailFlavor *flavour;
TumblerImageData data;
GError *error = NULL;
g_return_if_fail (IS_GST_THUMBNAILER (thumbnailer));
g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
g_return_if_fail (TUMBLER_IS_FILE_INFO (info));
/* Check for early cancellation */
if (g_cancellable_is_cancelled (cancellable))
return;
playbin = make_pipeline (info, cancellable);
if (playbin == NULL) {
/* TODO: emit an error, but the specification won't let me. */
return;
}
duration = get_duration (playbin);
/* Now we have a pipeline that we know has video and is paused, ready for
seeking */
for (i = 0; i < G_N_ELEMENTS (positions); i++) {
/* Check if we've been cancelled */
if (g_cancellable_is_cancelled (cancellable)) {
gst_element_set_state (playbin, GST_STATE_NULL);
g_object_unref (playbin);
return;
}
LOG ("trying position %f", positions[i]);
gst_element_seek_simple (playbin,
GST_FORMAT_TIME,
GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_KEY_UNIT,
(gint64)(positions[i] * duration));
if (gst_element_get_state (playbin, NULL, NULL, 1 * GST_SECOND) == GST_STATE_CHANGE_FAILURE) {
LOG ("Could not seek");
return;
}
g_object_get (playbin, "frame", &frame, NULL);
if (frame == NULL) {
LOG ("No frame found!");
continue;
}
thumbnail = tumbler_file_info_get_thumbnail (info);
flavour = tumbler_thumbnail_get_flavor (thumbnail);
/* This frees the buffer for us */
shot = convert_buffer_to_pixbuf (frame, cancellable, flavour);
g_object_unref (flavour);
/* If it's not interesting, throw it away and try again*/
if (is_interesting (shot)) {
/* Got an interesting image, break out */
LOG ("Found an interesting image");
break;
}
/*
* If we've still got positions to try, free the current uninteresting
* shot. Otherwise we'll make do with what we have.
*/
if (i + 1 < G_N_ELEMENTS (positions) && shot) {
g_object_unref (shot);
shot = NULL;
}
/* Spin mainloop so we can pick up the cancels */
while (g_main_context_pending (NULL)) {
g_main_context_iteration (NULL, FALSE);
}
}
gst_element_set_state (playbin, GST_STATE_NULL);
g_object_unref (playbin);
if (shot) {
data.data = gdk_pixbuf_get_pixels (shot);
data.has_alpha = gdk_pixbuf_get_has_alpha (shot);
data.bits_per_sample = gdk_pixbuf_get_bits_per_sample (shot);
data.width = gdk_pixbuf_get_width (shot);
data.height = gdk_pixbuf_get_height (shot);
data.rowstride = gdk_pixbuf_get_rowstride (shot);
data.colorspace = (TumblerColorspace) gdk_pixbuf_get_colorspace (shot);
tumbler_thumbnail_save_image_data (thumbnail, &data,
tumbler_file_info_get_mtime (info),
NULL, &error);
g_object_unref (shot);
if (error != NULL) {
g_signal_emit_by_name (thumbnailer, "error",
tumbler_file_info_get_uri (info),
error->code, error->message);
g_error_free (error);
} else {
g_signal_emit_by_name (thumbnailer, "ready",
tumbler_file_info_get_uri (info));
}
}
}
