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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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camerabin: optimize setting new caps for preview image pipeline
Avoid re-creating and linking of preview image pipeline when setting new preview image caps. Backported from camerabin2. https://bugzilla.gnome.org/show_bug.cgi?id=639502
This commit is contained in:
parent
9ae14406e8
commit
ad019102e5
4 changed files with 166 additions and 111 deletions
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@ -60,124 +60,133 @@ create_element (const gchar * factory_name, const gchar * elem_name,
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/**
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* gst_camerabin_preview_create_pipeline:
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* @element: #GstCameraBin element
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* @caps: pointer to the caps used in pipeline
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* @src_filter: source filter element
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*
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* Create a preview converter pipeline that outputs the format defined in
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* @caps parameter.
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*
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* Returns: New pipeline, or NULL if error occured.
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* Returns: New pipeline data structure, or NULL if error occured.
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*/
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GstElement *
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gst_camerabin_preview_create_pipeline (GstCameraBin * camera, GstCaps * caps,
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GstCameraBinPreviewPipelineData *
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gst_camerabin_preview_create_pipeline (GstElement * element, GstCaps * caps,
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GstElement * src_filter)
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{
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GstElement *pipe, *src, *csp, *filter, *vscale, *sink;
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GstElement *csp, *vscale;
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GError *error = NULL;
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GstCameraBinPreviewPipelineData *data;
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g_return_val_if_fail (caps != NULL, FALSE);
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g_return_val_if_fail (caps != NULL, NULL);
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GST_DEBUG ("creating elements");
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if (!create_element ("appsrc", "prev_src", &src, &error) ||
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!create_element ("videoscale", NULL, &vscale, &error) ||
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!create_element ("ffmpegcolorspace", NULL, &csp, &error) ||
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!create_element ("capsfilter", NULL, &filter, &error) ||
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!create_element ("fakesink", "prev_sink", &sink, &error))
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goto no_elements;
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data = g_new (GstCameraBinPreviewPipelineData, 1);
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/* We have multiple pipelines created by using this function, so we can't
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* give a name to them. Another way would to ensure the uniqueness of the
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* name here*/
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pipe = gst_pipeline_new (NULL);
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if (pipe == NULL)
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goto no_pipeline;
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data->pipeline = gst_pipeline_new (NULL);
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if (!data->pipeline)
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goto create_error;
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if (!create_element ("appsrc", "prev_src", &data->appsrc, &error) ||
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!create_element ("videoscale", NULL, &vscale, &error) ||
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!create_element ("ffmpegcolorspace", NULL, &csp, &error) ||
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!create_element ("capsfilter", NULL, &data->capsfilter, &error) ||
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!create_element ("fakesink", "prev_sink", &data->appsink, &error))
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goto create_error;
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GST_DEBUG ("adding elements");
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gst_bin_add_many (GST_BIN (pipe), src, csp, filter, vscale, sink, NULL);
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gst_bin_add_many (GST_BIN (data->pipeline), data->appsrc, csp,
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data->capsfilter, vscale, data->appsink, NULL);
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if (src_filter) {
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gst_bin_add (GST_BIN (pipe), src_filter);
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gst_bin_add (GST_BIN (data->pipeline), src_filter);
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}
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data->element = element;
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GST_DEBUG ("preview format is: %" GST_PTR_FORMAT, caps);
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g_object_set (filter, "caps", caps, NULL);
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g_object_set (sink, "preroll-queue-len", 1, "signal-handoffs", TRUE, NULL);
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g_object_set (data->capsfilter, "caps", caps, NULL);
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g_object_set (data->appsink, "preroll-queue-len", 1, "signal-handoffs", TRUE,
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NULL);
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g_object_set (vscale, "method", 0, NULL);
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/* FIXME: linking is still way too expensive, profile this properly */
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GST_DEBUG ("linking src->vscale");
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if (!gst_element_link_pads_full (src, "src", vscale, "sink",
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GST_PAD_LINK_CHECK_CAPS))
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return FALSE;
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if (!gst_element_link_pads (data->appsrc, "src", vscale, "sink"))
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goto link_error;
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if (src_filter) {
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GST_DEBUG ("linking vscale->filter");
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if (!gst_element_link_pads_full (vscale, "src", src_filter, "sink",
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GST_PAD_LINK_CHECK_CAPS)) {
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return FALSE;
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GST_DEBUG ("linking vscale->src_filter");
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if (!gst_element_link_pads (vscale, "src", src_filter, "sink")) {
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goto link_error;
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}
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GST_DEBUG ("linking filter->csp");
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if (!gst_element_link_pads_full (src_filter, "src", csp, "sink",
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GST_PAD_LINK_CHECK_CAPS)) {
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return FALSE;
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if (!gst_element_link_pads (src_filter, "src", csp, "sink")) {
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goto link_error;
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}
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} else {
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GST_DEBUG ("linking vscale->csp");
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if (!gst_element_link_pads_full (vscale, "src", csp, "sink",
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GST_PAD_LINK_CHECK_CAPS))
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return FALSE;
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if (!gst_element_link_pads (vscale, "src", csp, "sink"))
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goto link_error;
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}
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GST_DEBUG ("linking csp->capsfilter");
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if (!gst_element_link_pads_full (csp, "src", filter, "sink",
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GST_PAD_LINK_CHECK_CAPS))
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return FALSE;
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if (!gst_element_link_pads (csp, "src", data->capsfilter, "sink"))
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goto link_error;
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GST_DEBUG ("linking capsfilter->sink");
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if (!gst_element_link_pads_full (filter, "src", sink, "sink",
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GST_PAD_LINK_CHECK_CAPS))
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return FALSE;
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if (!gst_element_link_pads (data->capsfilter, "src", data->appsink, "sink"))
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goto link_error;
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return pipe;
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return data;
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/* ERRORS */
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no_elements:
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{
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g_warning ("Could not make preview pipeline: %s", error->message);
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create_error:
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if (error) {
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GST_WARNING ("Preview pipeline element creation failed: %s",
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error->message);
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g_error_free (error);
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return NULL;
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}
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no_pipeline:
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{
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g_warning ("Could not make preview pipeline: %s",
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"no pipeline (unknown error)");
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return NULL;
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}
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if (csp)
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gst_object_unref (csp);
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if (vscale)
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gst_object_unref (vscale);
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if (data->appsrc)
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gst_object_unref (data->appsrc);
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if (data->capsfilter)
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gst_object_unref (data->capsfilter);
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if (data->appsink)
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gst_object_unref (data->appsink);
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link_error:
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GST_WARNING ("Could not create preview pipeline");
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gst_camerabin_preview_destroy_pipeline (data);
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return NULL;
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}
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/**
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* gst_camerabin_preview_destroy_pipeline:
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* @camera: camerabin object
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* @pipeline: the pipeline to be destroyed
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* @data: the pipeline data to be destroyed
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*
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* Destroy preview converter pipeline.
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*/
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void
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gst_camerabin_preview_destroy_pipeline (GstCameraBin * camera,
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GstElement * pipeline)
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gst_camerabin_preview_destroy_pipeline (GstCameraBinPreviewPipelineData * data)
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{
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g_return_if_fail (pipeline != NULL);
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gst_element_set_state (pipeline, GST_STATE_NULL);
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gst_object_unref (pipeline);
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if (data->pipeline) {
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gst_element_set_state (data->pipeline, GST_STATE_NULL);
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gst_object_unref (data->pipeline);
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}
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g_free (data);
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}
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/**
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* gst_camerabin_preview_convert:
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* @camera: camerabin object
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* @pipeline: preview pipeline to use
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* @data: preview pipeline data to use
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* @buf: #GstBuffer that contains the frame to be converted
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*
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* Create a preview image of the given frame.
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@ -185,8 +194,8 @@ gst_camerabin_preview_destroy_pipeline (GstCameraBin * camera,
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* Returns: converted preview image, or NULL if operation failed.
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*/
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GstBuffer *
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gst_camerabin_preview_convert (GstCameraBin * camera,
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GstElement * pipeline, GstBuffer * buf)
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gst_camerabin_preview_convert (GstCameraBinPreviewPipelineData * data,
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GstBuffer * buf)
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{
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GstMessage *msg;
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GstBuffer *result = NULL;
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@ -198,13 +207,13 @@ gst_camerabin_preview_convert (GstCameraBin * camera,
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g_return_val_if_fail (GST_BUFFER_CAPS (buf) != NULL, NULL);
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if (pipeline == NULL) {
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if (data->pipeline == NULL) {
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GST_WARNING ("pipeline is NULL");
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goto no_pipeline;
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}
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src = gst_bin_get_by_name (GST_BIN (pipeline), "prev_src");
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sink = gst_bin_get_by_name (GST_BIN (pipeline), "prev_sink");
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src = gst_bin_get_by_name (GST_BIN (data->pipeline), "prev_src");
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sink = gst_bin_get_by_name (GST_BIN (data->pipeline), "prev_sink");
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if (!src || !sink) {
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GST_WARNING ("pipeline doesn't have src / sink elements");
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@ -222,11 +231,11 @@ gst_camerabin_preview_convert (GstCameraBin * camera,
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GST_DEBUG ("running conversion pipeline, source is: %" GST_PTR_FORMAT,
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GST_BUFFER_CAPS (buf));
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gst_element_set_state (pipeline, GST_STATE_PLAYING);
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gst_element_set_state (data->pipeline, GST_STATE_PLAYING);
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g_signal_emit_by_name (src, "push-buffer", buf, &fret);
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bus = gst_element_get_bus (pipeline);
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bus = gst_element_get_bus (data->pipeline);
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msg = gst_bus_timed_pop_filtered (bus, (25 * GST_SECOND),
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GST_MESSAGE_ERROR | GST_MESSAGE_EOS);
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gst_object_unref (bus);
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@ -268,7 +277,7 @@ gst_camerabin_preview_convert (GstCameraBin * camera,
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g_signal_handlers_disconnect_by_func (sink, G_CALLBACK (save_result),
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&result);
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gst_element_set_state (pipeline, GST_STATE_READY);
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gst_element_set_state (data->pipeline, GST_STATE_READY);
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GST_BUFFER_FLAGS (buf) = bflags;
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@ -297,7 +306,7 @@ no_pipeline:
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/**
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* gst_camerabin_preview_send_event:
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* @camera: the #GstCameraBin
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* @data: preview pipeline data to use
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* @evt: The #GstEvent to be pushed, takes ownership
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*
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* Pushes an event to the preview pipeline.
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@ -305,21 +314,50 @@ no_pipeline:
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* Returns: True if the event was handled
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*/
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gboolean
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gst_camerabin_preview_send_event (GstCameraBin * camera, GstElement * pipeline,
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gst_camerabin_preview_send_event (GstCameraBinPreviewPipelineData * data,
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GstEvent * evt)
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{
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GstElement *src;
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gboolean ret = FALSE;
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src = gst_bin_get_by_name (GST_BIN (pipeline), "prev_src");
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src = gst_bin_get_by_name (GST_BIN (data->pipeline), "prev_src");
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if (!src) {
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GST_WARNING ("Preview pipeline doesn't have src element, can't push event");
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gst_event_unref (evt);
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} else {
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GST_DEBUG_OBJECT (camera, "Pushing event %p to preview pipeline", evt);
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ret = gst_element_send_event (src, evt);
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gst_object_unref (src);
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return FALSE;
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}
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return ret;
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GST_DEBUG_OBJECT (data->element, "Pushing event %p to preview pipeline", evt);
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return gst_element_send_event (src, evt);
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}
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/**
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* gst_camerabin_preview_set_caps:
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* @data: preview pipeline data to use
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* @caps: New #GstCaps to be set for the pipeline
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*
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* Sets new caps for the preview pipeline
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*/
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void
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gst_camerabin_preview_set_caps (GstCameraBinPreviewPipelineData * data,
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GstCaps * caps)
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{
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GstState state, pending;
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GstStateChangeReturn ret;
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g_return_if_fail (data->pipeline != NULL);
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g_return_if_fail (caps != NULL);
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ret = gst_element_get_state (data->pipeline, &state, &pending, 0);
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if (ret == GST_STATE_CHANGE_FAILURE) {
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/* make it try again */
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state = GST_STATE_PLAYING;
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pending = GST_STATE_VOID_PENDING;
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}
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gst_element_set_state (data->pipeline, GST_STATE_NULL);
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g_object_set (data->capsfilter, "caps", caps, NULL);
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if (pending != GST_STATE_VOID_PENDING)
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state = pending;
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gst_element_set_state (data->pipeline, state);
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}
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@ -23,20 +23,35 @@
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#include <gst/gst.h>
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#include "gstcamerabin.h"
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G_BEGIN_DECLS
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GstElement * gst_camerabin_preview_create_pipeline (GstCameraBin * camera,
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GstCaps * caps, GstElement * src_filter);
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void gst_camerabin_preview_destroy_pipeline (GstCameraBin * camera,
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GstElement * pipeline);
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typedef struct
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{
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GstElement *pipeline;
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GstBuffer *gst_camerabin_preview_convert (GstCameraBin * camera,
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GstElement * pipeline, GstBuffer * buf);
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GstElement *appsrc;
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GstElement *capsfilter;
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GstElement *appsink;
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gboolean gst_camerabin_preview_send_event (GstCameraBin * camera,
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GstElement * pipeline, GstEvent * event);
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GstElement *element;
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} GstCameraBinPreviewPipelineData;
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GstCameraBinPreviewPipelineData * gst_camerabin_preview_create_pipeline (
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GstElement *element, GstCaps *caps, GstElement *src_filter);
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void gst_camerabin_preview_destroy_pipeline (
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GstCameraBinPreviewPipelineData *data);
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GstBuffer *gst_camerabin_preview_convert (
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GstCameraBinPreviewPipelineData *data, GstBuffer *buf);
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gboolean gst_camerabin_preview_send_event (
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GstCameraBinPreviewPipelineData *pipeline, GstEvent *event);
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void gst_camerabin_preview_set_caps (
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GstCameraBinPreviewPipelineData *pipeline, GstCaps *caps);
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G_END_DECLS
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#endif /* __CAMERABINPREVIEW_H__ */
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@ -1760,7 +1760,7 @@ camerabin_pad_blocked (GstPad * pad, gboolean blocked, gpointer user_data)
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static gboolean
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gst_camerabin_send_preview (GstCameraBin * camera, GstBuffer * buffer)
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{
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GstElement *pipeline;
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GstCameraBinPreviewPipelineData *data;
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GstBuffer *prev = NULL;
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GstStructure *s;
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GstMessage *msg;
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@ -1768,9 +1768,9 @@ gst_camerabin_send_preview (GstCameraBin * camera, GstBuffer * buffer)
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GST_DEBUG_OBJECT (camera, "creating preview");
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pipeline = (camera->mode == MODE_IMAGE) ?
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data = (camera->mode == MODE_IMAGE) ?
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camera->preview_pipeline : camera->video_preview_pipeline;
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prev = gst_camerabin_preview_convert (camera, pipeline, buffer);
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prev = gst_camerabin_preview_convert (data, buffer);
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GST_DEBUG_OBJECT (camera, "preview created: %p", prev);
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@ -1865,12 +1865,11 @@ gst_camerabin_have_img_buffer (GstPad * pad, GstMiniObject * obj,
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/* forward tag events to preview pipeline */
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if (camera->preview_caps && GST_EVENT_TYPE (event) == GST_EVENT_TAG) {
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GstElement *pipeline;
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GstCameraBinPreviewPipelineData *data;
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pipeline = (camera->mode == MODE_IMAGE) ?
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data = (camera->mode == MODE_IMAGE) ?
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camera->preview_pipeline : camera->video_preview_pipeline;
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gst_camerabin_preview_send_event (camera, pipeline,
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gst_event_ref (event));
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gst_camerabin_preview_send_event (data, gst_event_ref (event));
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}
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}
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@ -3373,12 +3372,11 @@ gst_camerabin_dispose (GObject * object)
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gst_object_unref (camera->vidbin);
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if (camera->preview_pipeline) {
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gst_camerabin_preview_destroy_pipeline (camera, camera->preview_pipeline);
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gst_camerabin_preview_destroy_pipeline (camera->preview_pipeline);
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camera->preview_pipeline = NULL;
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}
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if (camera->video_preview_pipeline) {
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gst_camerabin_preview_destroy_pipeline (camera,
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camera->video_preview_pipeline);
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gst_camerabin_preview_destroy_pipeline (camera->video_preview_pipeline);
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camera->video_preview_pipeline = NULL;
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}
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@ -3525,7 +3523,7 @@ gst_camerabin_set_property (GObject * object, guint prop_id,
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break;
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case ARG_PREVIEW_CAPS:
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{
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GstElement **prev_pipe = NULL;
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GstCameraBinPreviewPipelineData **prev_pipe = NULL;
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GstElement **preview_source_filter = NULL;
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GstCaps **prev_caps = NULL;
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GstCaps *new_caps = NULL;
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@ -3545,19 +3543,20 @@ gst_camerabin_set_property (GObject * object, guint prop_id,
|
|||
if (prev_caps && !gst_caps_is_equal (*prev_caps, new_caps)) {
|
||||
GST_DEBUG_OBJECT (camera,
|
||||
"setting preview caps: %" GST_PTR_FORMAT, new_caps);
|
||||
if (*prev_pipe) {
|
||||
gst_camerabin_preview_destroy_pipeline (camera, *prev_pipe);
|
||||
*prev_pipe = NULL;
|
||||
}
|
||||
|
||||
GST_OBJECT_LOCK (camera);
|
||||
gst_caps_replace (prev_caps, new_caps);
|
||||
GST_OBJECT_UNLOCK (camera);
|
||||
|
||||
if (new_caps && !gst_caps_is_any (new_caps) &&
|
||||
!gst_caps_is_empty (new_caps)) {
|
||||
*prev_pipe =
|
||||
gst_camerabin_preview_create_pipeline (camera, new_caps,
|
||||
*preview_source_filter);
|
||||
if (!*prev_pipe) {
|
||||
*prev_pipe =
|
||||
gst_camerabin_preview_create_pipeline (GST_ELEMENT (camera),
|
||||
new_caps, *preview_source_filter);
|
||||
} else {
|
||||
gst_camerabin_preview_set_caps (*prev_pipe, new_caps);
|
||||
}
|
||||
}
|
||||
}
|
||||
break;
|
||||
|
@ -3568,7 +3567,7 @@ gst_camerabin_set_property (GObject * object, guint prop_id,
|
|||
("camerabin must be in NULL state when setting the preview source filter element"),
|
||||
(NULL));
|
||||
} else {
|
||||
GstElement **preview_pipe = NULL;
|
||||
GstCameraBinPreviewPipelineData **preview_pipe = NULL;
|
||||
GstElement **preview_source_filter = NULL;
|
||||
GstCaps *preview_caps = NULL;
|
||||
|
||||
|
@ -3587,10 +3586,10 @@ gst_camerabin_set_property (GObject * object, guint prop_id,
|
|||
*preview_source_filter = g_value_dup_object (value);
|
||||
|
||||
if (*preview_pipe) {
|
||||
gst_camerabin_preview_destroy_pipeline (camera, *preview_pipe);
|
||||
gst_camerabin_preview_destroy_pipeline (*preview_pipe);
|
||||
*preview_pipe =
|
||||
gst_camerabin_preview_create_pipeline (camera, preview_caps,
|
||||
*preview_source_filter);
|
||||
gst_camerabin_preview_create_pipeline (GST_ELEMENT (camera),
|
||||
preview_caps, *preview_source_filter);
|
||||
}
|
||||
}
|
||||
break;
|
||||
|
|
|
@ -31,6 +31,7 @@
|
|||
#include "gstcamerabin-enum.h"
|
||||
#include "camerabinimage.h"
|
||||
#include "camerabinvideo.h"
|
||||
#include "camerabinpreview.h"
|
||||
|
||||
G_BEGIN_DECLS
|
||||
/* #defines don't like whitespacey bits */
|
||||
|
@ -147,8 +148,10 @@ struct _GstCameraBin
|
|||
GstElement *imgbin; /* bin that holds image capturing elements */
|
||||
GstElement *vidbin; /* bin that holds video capturing elements */
|
||||
GstElement *active_bin; /* image or video bin that is currently in use */
|
||||
GstElement *preview_pipeline; /* pipeline for creating preview images */
|
||||
GstElement *video_preview_pipeline; /* pipeline for creating video preview image */
|
||||
/* pipeline for creating preview images */
|
||||
GstCameraBinPreviewPipelineData *preview_pipeline;
|
||||
/* pipeline for creating video preview image */
|
||||
GstCameraBinPreviewPipelineData *video_preview_pipeline;
|
||||
|
||||
GstBuffer *video_preview_buffer; /* buffer for storing video preview */
|
||||
|
||||
|
|
Loading…
Reference in a new issue