static GstSample *
_gst_sample_copy (GstSample * sample)
{
GstSample *copy;
copy = gst_sample_new (sample->buffer, sample->caps, &sample->segment,
gst_structure_copy (sample->info));
return copy;
}
GstSample *
gst_app_sink_pull_sample (GstAppSink * appsink)
{
GstSample *sample = NULL;
GstBuffer *buffer;
GstAppSinkPrivate *priv;
g_return_val_if_fail (GST_IS_APP_SINK (appsink), NULL);
priv = appsink->priv;
g_mutex_lock (&priv->mutex);
while (TRUE) {
GST_DEBUG_OBJECT (appsink, "trying to grab a buffer");
if (!priv->started)
goto not_started;
if (priv->num_buffers > 0)
break;
if (priv->is_eos)
goto eos;
/* nothing to return, wait */
GST_DEBUG_OBJECT (appsink, "waiting for a buffer");
g_cond_wait (&priv->cond, &priv->mutex);
}
buffer = dequeue_buffer (appsink);
GST_DEBUG_OBJECT (appsink, "we have a buffer %p", buffer);
sample = gst_sample_new (buffer, priv->last_caps, &priv->last_segment, NULL);
gst_buffer_unref (buffer);
g_cond_signal (&priv->cond);
g_mutex_unlock (&priv->mutex);
return sample;
/* special conditions */
eos:
{
GST_DEBUG_OBJECT (appsink, "we are EOS, return NULL");
g_mutex_unlock (&priv->mutex);
return NULL;
}
not_started:
{
GST_DEBUG_OBJECT (appsink, "we are stopped, return NULL");
g_mutex_unlock (&priv->mutex);
return NULL;
}
}
static void
got_buf_cb (GstElement * sink, GstBuffer * new_buf, GstPad * pad,
GstSample ** p_old_sample)
{
GstCaps *caps;
caps = gst_pad_get_current_caps (pad);
if (*p_old_sample)
gst_sample_unref (*p_old_sample);
*p_old_sample = gst_sample_new (new_buf, caps, NULL, NULL);
gst_caps_unref (caps);
}
/**
* gst_app_sink_pull_preroll:
* @appsink: a #GstAppSink
*
* Get the last preroll sample in @appsink. This was the sample that caused the
* appsink to preroll in the PAUSED state. This sample can be pulled many times
* and remains available to the application even after EOS.
*
* This function is typically used when dealing with a pipeline in the PAUSED
* state. Calling this function after doing a seek will give the sample right
* after the seek position.
*
* Note that the preroll sample will also be returned as the first sample
* when calling gst_app_sink_pull_sample().
*
* If an EOS event was received before any buffers, this function returns
* %NULL. Use gst_app_sink_is_eos () to check for the EOS condition.
*
* This function blocks until a preroll sample or EOS is received or the appsink
* element is set to the READY/NULL state.
*
* Returns: (transfer full): a #GstSample or NULL when the appsink is stopped or EOS.
* Call gst_sample_unref() after usage.
*/
GstSample *
gst_app_sink_pull_preroll (GstAppSink * appsink)
{
GstSample *sample = NULL;
GstAppSinkPrivate *priv;
g_return_val_if_fail (GST_IS_APP_SINK (appsink), NULL);
priv = appsink->priv;
g_mutex_lock (&priv->mutex);
while (TRUE) {
GST_DEBUG_OBJECT (appsink, "trying to grab a buffer");
if (!priv->started)
goto not_started;
if (priv->preroll != NULL)
break;
if (priv->is_eos)
goto eos;
/* nothing to return, wait */
GST_DEBUG_OBJECT (appsink, "waiting for the preroll buffer");
g_cond_wait (&priv->cond, &priv->mutex);
}
sample =
gst_sample_new (priv->preroll, priv->preroll_caps, &priv->preroll_segment,
NULL);
GST_DEBUG_OBJECT (appsink, "we have the preroll sample %p", sample);
g_mutex_unlock (&priv->mutex);
return sample;
/* special conditions */
eos:
{
GST_DEBUG_OBJECT (appsink, "we are EOS, return NULL");
g_mutex_unlock (&priv->mutex);
return NULL;
}
not_started:
{
GST_DEBUG_OBJECT (appsink, "we are stopped, return NULL");
g_mutex_unlock (&priv->mutex);
return NULL;
}
}
/**
* gst_wrapper_camera_bin_src_imgsrc_probe:
*
* Buffer probe called before sending each buffer to image queue.
*/
static GstPadProbeReturn
gst_wrapper_camera_bin_src_imgsrc_probe (GstPad * pad, GstPadProbeInfo * info,
gpointer data)
{
GstWrapperCameraBinSrc *self = GST_WRAPPER_CAMERA_BIN_SRC (data);
GstBaseCameraSrc *camerasrc = GST_BASE_CAMERA_SRC (data);
GstBuffer *buffer = GST_BUFFER (info->data);
GstPadProbeReturn ret = GST_PAD_PROBE_DROP;
GST_LOG_OBJECT (self, "Image probe, mode %d, capture count %d bufsize: %"
G_GSIZE_FORMAT, camerasrc->mode, self->image_capture_count,
gst_buffer_get_size (buffer));
g_mutex_lock (&camerasrc->capturing_mutex);
if (self->image_capture_count > 0) {
GstSample *sample;
GstCaps *caps;
ret = GST_PAD_PROBE_OK;
self->image_capture_count--;
/* post preview */
/* TODO This can likely be optimized if the viewfinder caps is the same as
* the preview caps, avoiding another scaling of the same buffer. */
GST_DEBUG_OBJECT (self, "Posting preview for image");
caps = gst_pad_get_current_caps (pad);
sample = gst_sample_new (buffer, caps, NULL, NULL);
gst_base_camera_src_post_preview (camerasrc, sample);
gst_caps_unref (caps);
gst_sample_unref (sample);
if (self->image_capture_count == 0) {
gst_base_camera_src_finish_capture (camerasrc);
}
}
g_mutex_unlock (&camerasrc->capturing_mutex);
return ret;
}
/**
* gst_tag_image_data_to_image_sample:
* @image_data: the (encoded) image
* @image_data_len: the length of the encoded image data at @image_data
* @image_type: type of the image, or #GST_TAG_IMAGE_TYPE_UNDEFINED. Pass
* #GST_TAG_IMAGE_TYPE_NONE if no image type should be set at all (e.g.
* for preview images)
*
* Helper function for tag-reading plugins to create a #GstSample suitable to
* add to a #GstTagList as an image tag (such as #GST_TAG_IMAGE or
* #GST_TAG_PREVIEW_IMAGE) from the encoded image data and an (optional) image
* type.
*
* Background: cover art and other images in tags are usually stored as a
* blob of binary image data, often accompanied by a MIME type or some other
* content type string (e.g. 'png', 'jpeg', 'jpg'). Sometimes there is also an
* 'image type' to indicate what kind of image this is (e.g. front cover,
* back cover, artist, etc.). The image data may also be an URI to the image
* rather than the image itself.
*
* In GStreamer, image tags are #GstSample<!-- -->s containing the raw image
* data, with the sample caps describing the content type of the image
* (e.g. image/jpeg, image/png, text/uri-list). The sample info may contain
* an additional 'image-type' field of #GST_TYPE_TAG_IMAGE_TYPE to describe
* the type of image (front cover, back cover etc.). #GST_TAG_PREVIEW_IMAGE
* tags should not carry an image type, their type is already indicated via
* the special tag name.
*
* This function will do various checks and typefind the encoded image
* data (we can't trust the declared mime type).
*
* Returns: a newly-allocated image sample for use in tag lists, or NULL
*/
GstSample *
gst_tag_image_data_to_image_sample (const guint8 * image_data,
guint image_data_len, GstTagImageType image_type)
{
const gchar *name;
GstBuffer *image;
GstSample *sample;
GstCaps *caps;
GstMapInfo info;
GstStructure *image_info = NULL;
g_return_val_if_fail (image_data != NULL, NULL);
g_return_val_if_fail (image_data_len > 0, NULL);
g_return_val_if_fail (gst_tag_image_type_is_valid (image_type), NULL);
GST_DEBUG ("image data len: %u bytes", image_data_len);
/* allocate space for a NUL terminator for an uri too */
image = gst_buffer_new_and_alloc (image_data_len + 1);
if (image == NULL)
goto alloc_failed;
gst_buffer_map (image, &info, GST_MAP_WRITE);
memcpy (info.data, image_data, image_data_len);
info.data[image_data_len] = '\0';
gst_buffer_unmap (image, &info);
/* Find GStreamer media type, can't trust declared type */
caps = gst_type_find_helper_for_buffer (NULL, image, NULL);
if (caps == NULL)
goto no_type;
GST_DEBUG ("Found GStreamer media type: %" GST_PTR_FORMAT, caps);
/* sanity check: make sure typefound/declared caps are either URI or image */
name = gst_structure_get_name (gst_caps_get_structure (caps, 0));
if (!g_str_has_prefix (name, "image/") &&
!g_str_has_prefix (name, "video/") &&
!g_str_equal (name, "text/uri-list")) {
GST_DEBUG ("Unexpected image type '%s', ignoring image frame", name);
goto error;
}
/* Decrease size by 1 if we don't have an URI list
* to keep the original size of the image
*/
if (!g_str_equal (name, "text/uri-list"))
gst_buffer_set_size (image, image_data_len);
if (image_type != GST_TAG_IMAGE_TYPE_NONE) {
GST_LOG ("Setting image type: %d", image_type);
image_info = gst_structure_new ("GstTagImageInfo",
"image-type", GST_TYPE_TAG_IMAGE_TYPE, image_type, NULL);
}
sample = gst_sample_new (image, caps, NULL, image_info);
gst_buffer_unref (image);
gst_caps_unref (caps);
return sample;
/* ERRORS */
no_type:
{
GST_DEBUG ("Could not determine GStreamer media type, ignoring image");
/* fall through */
}
error:
{
if (image)
gst_buffer_unref (image);
if (caps)
gst_caps_unref (caps);
return NULL;
}
alloc_failed:
{
GST_WARNING ("failed to allocate buffer of %d for image", image_data_len);
gst_buffer_unref (image);
return NULL;
}
}
/**
* gst_wrapper_camera_bin_src_vidsrc_probe:
*
* Buffer probe called before sending each buffer to image queue.
*/
static GstPadProbeReturn
gst_wrapper_camera_bin_src_vidsrc_probe (GstPad * pad, GstPadProbeInfo * info,
gpointer data)
{
GstWrapperCameraBinSrc *self = GST_WRAPPER_CAMERA_BIN_SRC (data);
GstBaseCameraSrc *camerasrc = GST_BASE_CAMERA_SRC_CAST (self);
GstPadProbeReturn ret = GST_PAD_PROBE_DROP;
GstBuffer *buffer = GST_BUFFER (info->data);
GST_LOG_OBJECT (self, "Video probe, mode %d, capture status %d",
camerasrc->mode, self->video_rec_status);
/* TODO do we want to lock for every buffer? */
/*
* Note that we can use gst_pad_push_event here because we are a buffer
* probe.
*/
/* TODO shouldn't access this directly */
g_mutex_lock (&camerasrc->capturing_mutex);
if (self->video_rec_status == GST_VIDEO_RECORDING_STATUS_DONE) {
/* NOP */
} else if (self->video_rec_status == GST_VIDEO_RECORDING_STATUS_STARTING) {
GstClockTime ts;
GstSegment segment;
GstCaps *caps;
GstSample *sample;
GST_DEBUG_OBJECT (self, "Starting video recording");
self->video_rec_status = GST_VIDEO_RECORDING_STATUS_RUNNING;
ts = GST_BUFFER_TIMESTAMP (buffer);
if (!GST_CLOCK_TIME_IS_VALID (ts))
ts = 0;
gst_segment_init (&segment, GST_FORMAT_TIME);
segment.start = ts;
gst_pad_push_event (self->vidsrc, gst_event_new_segment (&segment));
/* post preview */
GST_DEBUG_OBJECT (self, "Posting preview for video");
caps = gst_pad_get_current_caps (pad);
sample = gst_sample_new (buffer, caps, NULL, NULL);
gst_base_camera_src_post_preview (camerasrc, sample);
gst_caps_unref (caps);
gst_sample_unref (sample);
ret = GST_PAD_PROBE_OK;
} else if (self->video_rec_status == GST_VIDEO_RECORDING_STATUS_FINISHING) {
GstPad *peer;
/* send eos */
GST_DEBUG_OBJECT (self, "Finishing video recording, pushing eos");
peer = gst_pad_get_peer (self->vidsrc);
if (peer) {
/* send to the peer as we don't want our pads with eos flag */
gst_pad_send_event (peer, gst_event_new_eos ());
gst_object_unref (peer);
} else {
GST_WARNING_OBJECT (camerasrc, "No peer pad for vidsrc");
}
self->video_rec_status = GST_VIDEO_RECORDING_STATUS_DONE;
gst_base_camera_src_finish_capture (camerasrc);
} else {
ret = GST_PAD_PROBE_OK;
}
g_mutex_unlock (&camerasrc->capturing_mutex);
return ret;
}
static GstFlowReturn
gst_overlay_composition_sink_chain (GstPad * pad, GstObject * parent,
GstBuffer * buffer)
{
GstOverlayComposition *self = GST_OVERLAY_COMPOSITION (parent);
GstVideoOverlayComposition *compo = NULL;
GstVideoOverlayCompositionMeta *upstream_compo_meta;
if (gst_pad_check_reconfigure (self->srcpad)) {
if (!gst_overlay_composition_negotiate (self, NULL)) {
gst_pad_mark_reconfigure (self->srcpad);
gst_buffer_unref (buffer);
GST_OBJECT_LOCK (self->srcpad);
if (GST_PAD_IS_FLUSHING (self->srcpad)) {
GST_OBJECT_UNLOCK (self->srcpad);
return GST_FLOW_FLUSHING;
}
GST_OBJECT_UNLOCK (self->srcpad);
return GST_FLOW_NOT_NEGOTIATED;
}
}
if (!self->sample) {
self->sample = gst_sample_new (buffer, self->caps, &self->segment, NULL);
} else {
self->sample = gst_sample_make_writable (self->sample);
gst_sample_set_buffer (self->sample, buffer);
gst_sample_set_caps (self->sample, self->caps);
gst_sample_set_segment (self->sample, &self->segment);
}
g_signal_emit (self, overlay_composition_signals[SIGNAL_DRAW], 0,
self->sample, &compo);
/* Don't store the buffer in the sample any longer, otherwise it will not
* be writable below as we have one reference in the sample and one in
* this function.
*
* If the sample is not writable itself then the application kept an
* reference itself.
*/
if (gst_sample_is_writable (self->sample)) {
gst_sample_set_buffer (self->sample, NULL);
}
if (!compo) {
GST_DEBUG_OBJECT (self->sinkpad,
"Application did not provide an overlay composition");
return gst_pad_push (self->srcpad, buffer);
}
/* If upstream attached a meta, we can safely add our own things
* in it. Upstream must've checked that downstream supports it */
upstream_compo_meta = gst_buffer_get_video_overlay_composition_meta (buffer);
if (upstream_compo_meta) {
GstVideoOverlayComposition *merged_compo =
gst_video_overlay_composition_copy (upstream_compo_meta->overlay);
guint i, n;
GST_DEBUG_OBJECT (self->sinkpad,
"Appending to upstream overlay composition");
n = gst_video_overlay_composition_n_rectangles (compo);
for (i = 0; i < n; i++) {
GstVideoOverlayRectangle *rect =
gst_video_overlay_composition_get_rectangle (compo, i);
gst_video_overlay_composition_add_rectangle (merged_compo, rect);
}
gst_video_overlay_composition_unref (compo);
gst_video_overlay_composition_unref (upstream_compo_meta->overlay);
upstream_compo_meta->overlay = merged_compo;
} else if (self->attach_compo_to_buffer) {
GST_DEBUG_OBJECT (self->sinkpad, "Attaching as meta");
buffer = gst_buffer_make_writable (buffer);
gst_buffer_add_video_overlay_composition_meta (buffer, compo);
gst_video_overlay_composition_unref (compo);
} else {
GstVideoFrame frame;
buffer = gst_buffer_make_writable (buffer);
if (!gst_video_frame_map (&frame, &self->info, buffer, GST_MAP_READWRITE)) {
gst_video_overlay_composition_unref (compo);
goto map_failed;
}
gst_video_overlay_composition_blend (compo, &frame);
gst_video_frame_unmap (&frame);
gst_video_overlay_composition_unref (compo);
}
return gst_pad_push (self->srcpad, buffer);
map_failed:
{
GST_ERROR_OBJECT (self->sinkpad, "Failed to map buffer");
gst_buffer_unref (buffer);
return GST_FLOW_ERROR;
}
}
static GstFlowReturn
gst_pngdec_caps_create_and_set (GstPngDec * pngdec)
{
GstFlowReturn ret = GST_FLOW_OK;
gint bpc = 0, color_type;
png_uint_32 width, height;
GstVideoFormat format = GST_VIDEO_FORMAT_UNKNOWN;
g_return_val_if_fail (GST_IS_PNGDEC (pngdec), GST_FLOW_ERROR);
/* Get bits per channel */
bpc = png_get_bit_depth (pngdec->png, pngdec->info);
/* Get Color type */
color_type = png_get_color_type (pngdec->png, pngdec->info);
/* Add alpha channel if 16-bit depth, but not for GRAY images */
if ((bpc > 8) && (color_type != PNG_COLOR_TYPE_GRAY)) {
png_set_add_alpha (pngdec->png, 0xffff, PNG_FILLER_BEFORE);
png_set_swap (pngdec->png);
}
#if 0
/* We used to have this HACK to reverse the outgoing bytes, but the problem
* that originally required the hack seems to have been in videoconvert's
* RGBA descriptions. It doesn't seem needed now that's fixed, but might
* still be needed on big-endian systems, I'm not sure. J.S. 6/7/2007 */
if (color_type == PNG_COLOR_TYPE_RGB_ALPHA)
png_set_bgr (pngdec->png);
#endif
/* Gray scale with alpha channel converted to RGB */
if (color_type == PNG_COLOR_TYPE_GRAY_ALPHA) {
GST_LOG_OBJECT (pngdec,
"converting grayscale png with alpha channel to RGB");
png_set_gray_to_rgb (pngdec->png);
}
/* Gray scale converted to upscaled to 8 bits */
if ((color_type == PNG_COLOR_TYPE_GRAY_ALPHA) ||
(color_type == PNG_COLOR_TYPE_GRAY)) {
if (bpc < 8) { /* Convert to 8 bits */
GST_LOG_OBJECT (pngdec, "converting grayscale image to 8 bits");
#if PNG_LIBPNG_VER < 10400
png_set_gray_1_2_4_to_8 (pngdec->png);
#else
png_set_expand_gray_1_2_4_to_8 (pngdec->png);
#endif
}
}
/* Palette converted to RGB */
if (color_type == PNG_COLOR_TYPE_PALETTE) {
GST_LOG_OBJECT (pngdec, "converting palette png to RGB");
png_set_palette_to_rgb (pngdec->png);
}
png_set_interlace_handling (pngdec->png);
/* Update the info structure */
png_read_update_info (pngdec->png, pngdec->info);
/* Get IHDR header again after transformation settings */
png_get_IHDR (pngdec->png, pngdec->info, &width, &height,
&bpc, &pngdec->color_type, NULL, NULL, NULL);
GST_LOG_OBJECT (pngdec, "this is a %dx%d PNG image", (gint) width,
(gint) height);
switch (pngdec->color_type) {
case PNG_COLOR_TYPE_RGB:
GST_LOG_OBJECT (pngdec, "we have no alpha channel, depth is 24 bits");
if (bpc == 8)
format = GST_VIDEO_FORMAT_RGB;
break;
case PNG_COLOR_TYPE_RGB_ALPHA:
GST_LOG_OBJECT (pngdec,
"we have an alpha channel, depth is 32 or 64 bits");
if (bpc == 8)
format = GST_VIDEO_FORMAT_RGBA;
else if (bpc == 16)
format = GST_VIDEO_FORMAT_ARGB64;
break;
case PNG_COLOR_TYPE_GRAY:
GST_LOG_OBJECT (pngdec,
"We have an gray image, depth is 8 or 16 (be) bits");
if (bpc == 8)
format = GST_VIDEO_FORMAT_GRAY8;
else if (bpc == 16)
format = GST_VIDEO_FORMAT_GRAY16_BE;
break;
default:
break;
}
if (format == GST_VIDEO_FORMAT_UNKNOWN) {
GST_ELEMENT_ERROR (pngdec, STREAM, NOT_IMPLEMENTED, (NULL),
("pngdec does not support this color type"));
ret = GST_FLOW_NOT_SUPPORTED;
goto beach;
}
/* Check if output state changed */
if (pngdec->output_state) {
GstVideoInfo *info = &pngdec->output_state->info;
if (width == GST_VIDEO_INFO_WIDTH (info) &&
height == GST_VIDEO_INFO_HEIGHT (info) &&
GST_VIDEO_INFO_FORMAT (info) == format) {
goto beach;
}
gst_video_codec_state_unref (pngdec->output_state);
}
#ifdef HAVE_LIBPNG_1_5
if ((pngdec->color_type & PNG_COLOR_MASK_COLOR)
&& !(pngdec->color_type & PNG_COLOR_MASK_PALETTE)
&& png_get_valid (pngdec->png, pngdec->info, PNG_INFO_iCCP)) {
png_charp icc_name;
png_bytep icc_profile;
int icc_compression_type;
png_uint_32 icc_proflen = 0;
png_uint_32 ret = png_get_iCCP (pngdec->png, pngdec->info, &icc_name,
&icc_compression_type, &icc_profile, &icc_proflen);
if ((ret & PNG_INFO_iCCP)) {
gpointer gst_icc_prof = g_memdup (icc_profile, icc_proflen);
GstBuffer *tagbuffer = NULL;
GstSample *tagsample = NULL;
GstTagList *taglist = NULL;
GstStructure *info = NULL;
GstCaps *caps;
GST_DEBUG_OBJECT (pngdec, "extracted ICC profile '%s' length=%i",
icc_name, (guint32) icc_proflen);
tagbuffer = gst_buffer_new_wrapped (gst_icc_prof, icc_proflen);
caps = gst_caps_new_empty_simple ("application/vnd.iccprofile");
info = gst_structure_new_empty ("application/vnd.iccprofile");
if (icc_name)
gst_structure_set (info, "icc-name", G_TYPE_STRING, icc_name, NULL);
tagsample = gst_sample_new (tagbuffer, caps, NULL, info);
gst_buffer_unref (tagbuffer);
gst_caps_unref (caps);
taglist = gst_tag_list_new_empty ();
gst_tag_list_add (taglist, GST_TAG_MERGE_APPEND, GST_TAG_ATTACHMENT,
tagsample, NULL);
gst_sample_unref (tagsample);
gst_video_decoder_merge_tags (GST_VIDEO_DECODER (pngdec), taglist,
GST_TAG_MERGE_APPEND);
gst_tag_list_unref (taglist);
}
}
#endif
pngdec->output_state =
gst_video_decoder_set_output_state (GST_VIDEO_DECODER (pngdec), format,
width, height, pngdec->input_state);
gst_video_decoder_negotiate (GST_VIDEO_DECODER (pngdec));
GST_DEBUG ("Final %d %d", GST_VIDEO_INFO_WIDTH (&pngdec->output_state->info),
GST_VIDEO_INFO_HEIGHT (&pngdec->output_state->info));
beach:
return ret;
}
static GstFlowReturn
gst_skor_sink_transform_frame_ip (GstVideoFilter * vfilter, GstVideoFrame * frame)
{
GstSkorSink *sink = GST_SKORSINK (vfilter);
gpointer data;
gint stride, height;
zbar_image_t *image;
const zbar_symbol_t *symbol;
int n;
image = zbar_image_create ();
/* all formats we support start with an 8-bit Y plane. zbar doesn't need
* to know about the chroma plane(s) */
data = GST_VIDEO_FRAME_COMP_DATA (frame, 0);
stride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 0);
height = GST_VIDEO_FRAME_HEIGHT (frame);
zbar_image_set_format (image, GST_MAKE_FOURCC ('Y', '8', '0', '0'));
zbar_image_set_size (image, stride, height);
zbar_image_set_data (image, (gpointer) data, stride * height, NULL);
/* scan the image for barcodes */
n = zbar_scan_image (sink->scanner, image);
if (G_UNLIKELY (n == -1)) {
GST_WARNING_OBJECT (sink, "Error trying to scan frame. Skipping");
goto out;
}
if (n == 0)
goto out;
/* extract results */
symbol = zbar_image_first_symbol (image);
for (; symbol; symbol = zbar_symbol_next (symbol)) {
zbar_symbol_type_t typ = zbar_symbol_get_type (symbol);
const char *data = zbar_symbol_get_data (symbol);
gint quality = zbar_symbol_get_quality (symbol);
GST_DEBUG_OBJECT (sink, "decoded %s symbol \"%s\" at quality %d",
zbar_get_symbol_name (typ), data, quality);
if (sink->cache && zbar_symbol_get_count (symbol) != 0)
continue;
if (sink->data_consumer)
sink->data_consumer (data);
if (sink->message) {
GstMessage *m;
GstStructure *s;
GstSample *sample;
GstCaps *sample_caps;
s = gst_structure_new ("barcode",
"timestamp", G_TYPE_UINT64, GST_BUFFER_TIMESTAMP (frame->buffer),
"type", G_TYPE_STRING, zbar_get_symbol_name (typ),
"symbol", G_TYPE_STRING, data, "quality", G_TYPE_INT, quality, NULL);
if (sink->attach_frame) {
/* create a sample from image */
sample_caps = gst_video_info_to_caps (&frame->info);
sample = gst_sample_new (frame->buffer, sample_caps, NULL, NULL);
gst_caps_unref (sample_caps);
gst_structure_set (s, "frame", GST_TYPE_SAMPLE, sample, NULL);
gst_sample_unref (sample);
}
m = gst_message_new_element (GST_OBJECT (sink), s);
gst_element_post_message (GST_ELEMENT (sink), m);
} else if (sink->attach_frame)
GST_WARNING_OBJECT (sink,
"attach-frame=true has no effect if message=false");
}
out:
/* clean up */
zbar_image_scanner_recycle_image (sink->scanner, image);
zbar_image_destroy (image);
return GST_FLOW_OK;
}
