--- /dev/null
+/* GStreamer
+ * Copyright (c) 2005 Edward Hervey <bilboed@bilboed.com>
+ * Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/**
+ * SECTION:element-imagefreeze
+ *
+ * The imagefreeze element generates a still frame video stream from
+ * the input. It duplicates the first frame with the framerate requested
+ * by downstream, allows seeking and answers queries.
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * |[
+ * gst-launch -v filesrc location=some.png ! decodebin2 ! imagefreeze ! autovideosink
+ * ]| This pipeline shows a still frame stream of a PNG file.
+ * </refsect2>
+ */
+
+/* This is based on the imagefreeze element from PiTiVi:
+ * http://git.gnome.org/browse/pitivi/tree/pitivi/elements/imagefreeze.py
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstimagefreeze.h"
+
+static void gst_image_freeze_finalize (GObject * object);
+
+static void gst_image_freeze_reset (GstImageFreeze * self);
+
+static GstStateChangeReturn gst_image_freeze_change_state (GstElement * element,
+ GstStateChange transition);
+
+static GstFlowReturn gst_image_freeze_sink_chain (GstPad * pad,
+ GstBuffer * buffer);
+static gboolean gst_image_freeze_sink_event (GstPad * pad, GstEvent * event);
+static gboolean gst_image_freeze_sink_setcaps (GstPad * pad, GstCaps * caps);
+static GstCaps *gst_image_freeze_sink_getcaps (GstPad * pad);
+static gboolean gst_image_freeze_sink_query (GstPad * pad, GstQuery * query);
+static void gst_image_freeze_src_loop (GstPad * pad);
+static gboolean gst_image_freeze_src_event (GstPad * pad, GstEvent * event);
+static gboolean gst_image_freeze_src_query (GstPad * pad, GstQuery * query);
+static const GstQueryType *gst_image_freeze_src_query_type (GstPad * pad);
+
+static GstStaticPadTemplate sink_pad_template = GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("video/x-raw-yuv; video/x-raw-rgb; video/x-raw-gray"));
+
+static GstStaticPadTemplate src_pad_template =
+ GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("video/x-raw-yuv; video/x-raw-rgb; video/x-raw-gray"));
+
+GST_DEBUG_CATEGORY_STATIC (gst_image_freeze_debug);
+#define GST_CAT_DEFAULT gst_image_freeze_debug
+
+GST_BOILERPLATE (GstImageFreeze, gst_image_freeze, GstElement,
+ GST_TYPE_ELEMENT);
+
+static void
+gst_image_freeze_base_init (gpointer g_class)
+{
+ GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
+
+ gst_element_class_set_details_simple (gstelement_class,
+ "Still frame stream generator",
+ "Filter/Video",
+ "Generates a still frame stream from an image",
+ "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
+
+ gst_element_class_add_pad_template (gstelement_class,
+ gst_static_pad_template_get (&sink_pad_template));
+ gst_element_class_add_pad_template (gstelement_class,
+ gst_static_pad_template_get (&src_pad_template));
+}
+
+static void
+gst_image_freeze_class_init (GstImageFreezeClass * klass)
+{
+ GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+ GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
+
+ gobject_class->finalize = gst_image_freeze_finalize;
+
+ gstelement_class->change_state =
+ GST_DEBUG_FUNCPTR (gst_image_freeze_change_state);
+}
+
+static void
+gst_image_freeze_init (GstImageFreeze * self, GstImageFreezeClass * g_class)
+{
+ self->sinkpad = gst_pad_new_from_static_template (&sink_pad_template, "sink");
+ gst_pad_set_chain_function (self->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_image_freeze_sink_chain));
+ gst_pad_set_event_function (self->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_image_freeze_sink_event));
+ gst_pad_set_query_function (self->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_image_freeze_sink_query));
+ gst_pad_set_setcaps_function (self->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_image_freeze_sink_setcaps));
+ gst_pad_set_getcaps_function (self->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_image_freeze_sink_getcaps));
+ gst_element_add_pad (GST_ELEMENT (self), self->sinkpad);
+
+ self->srcpad = gst_pad_new_from_static_template (&src_pad_template, "src");
+ gst_pad_set_event_function (self->srcpad,
+ GST_DEBUG_FUNCPTR (gst_image_freeze_src_event));
+ gst_pad_set_query_function (self->srcpad,
+ GST_DEBUG_FUNCPTR (gst_image_freeze_src_query));
+ gst_pad_set_query_type_function (self->srcpad,
+ GST_DEBUG_FUNCPTR (gst_image_freeze_src_query_type));
+ gst_pad_use_fixed_caps (self->sinkpad);
+ gst_element_add_pad (GST_ELEMENT (self), self->srcpad);
+
+ gst_image_freeze_reset (self);
+}
+
+static void
+gst_image_freeze_finalize (GObject * object)
+{
+ GstImageFreeze *self = GST_IMAGE_FREEZE (object);
+
+ gst_image_freeze_reset (self);
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gst_image_freeze_reset (GstImageFreeze * self)
+{
+ GST_DEBUG_OBJECT (self, "Resetting internal state");
+
+ GST_OBJECT_LOCK (self);
+ gst_buffer_replace (&self->buffer, NULL);
+
+ gst_segment_init (&self->segment, GST_FORMAT_TIME);
+ self->need_segment = TRUE;
+ gst_event_replace (&self->close_segment, NULL);
+
+ self->fps_n = self->fps_d = 0;
+ self->offset = 0;
+ GST_OBJECT_UNLOCK (self);
+}
+
+static gboolean
+gst_image_freeze_sink_setcaps (GstPad * pad, GstCaps * caps)
+{
+ GstImageFreeze *self = GST_IMAGE_FREEZE (gst_pad_get_parent (pad));
+ gboolean ret = FALSE;
+ GstStructure *s;
+ gint fps_n, fps_d;
+ GstCaps *othercaps, *intersection;
+ guint i, n;
+
+ caps = gst_caps_make_writable (gst_caps_ref (caps));
+
+ GST_DEBUG_OBJECT (pad, "Setting caps: %" GST_PTR_FORMAT, caps);
+
+ s = gst_caps_get_structure (caps, 0);
+
+ /* 1. Remove framerate */
+ gst_structure_remove_field (s, "framerate");
+ gst_structure_set (s, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1,
+ NULL);
+
+ /* 2. Intersect with template caps */
+ othercaps = (GstCaps *) gst_pad_get_pad_template_caps (pad);
+ intersection = gst_caps_intersect (caps, othercaps);
+ GST_DEBUG_OBJECT (pad, "Intersecting: %" GST_PTR_FORMAT, caps);
+ GST_DEBUG_OBJECT (pad, "with: %" GST_PTR_FORMAT, othercaps);
+ GST_DEBUG_OBJECT (pad, "gave: %" GST_PTR_FORMAT, intersection);
+ gst_caps_unref (caps);
+ caps = intersection;
+ intersection = othercaps = NULL;
+
+ /* 3. Intersect with downstream peer caps */
+ othercaps = gst_pad_peer_get_caps (self->srcpad);
+ if (othercaps) {
+ intersection = gst_caps_intersect (caps, othercaps);
+ GST_DEBUG_OBJECT (pad, "Intersecting: %" GST_PTR_FORMAT, caps);
+ GST_DEBUG_OBJECT (pad, "with: %" GST_PTR_FORMAT, othercaps);
+ GST_DEBUG_OBJECT (pad, "gave: %" GST_PTR_FORMAT, intersection);
+ gst_caps_unref (othercaps);
+ gst_caps_unref (caps);
+ caps = intersection;
+ intersection = othercaps = NULL;
+ }
+
+ /* 4. For every candidate check if it's accepted downstream
+ * and fixate framerate to nearest 25/1 */
+ n = gst_caps_get_size (caps);
+ for (i = 0; i < n; i++) {
+ GstCaps *candidate = gst_caps_new_empty ();
+ GstStructure *s = gst_structure_copy (gst_caps_get_structure (caps, i));
+
+ gst_caps_append_structure (candidate, s);
+ if (gst_pad_peer_accept_caps (self->srcpad, candidate)) {
+ if (gst_structure_has_field_typed (s, "framerate", GST_TYPE_FRACTION) ||
+ gst_structure_fixate_field_nearest_fraction (s, "framerate", 25, 1)) {
+ gst_structure_get_fraction (s, "framerate", &fps_n, &fps_d);
+ if (fps_d != 0) {
+ GST_OBJECT_LOCK (self);
+ self->fps_n = fps_n;
+ self->fps_d = fps_d;
+ GST_OBJECT_UNLOCK (self);
+ GST_DEBUG_OBJECT (pad, "Setting caps %" GST_PTR_FORMAT, candidate);
+ gst_pad_set_caps (self->srcpad, candidate);
+ gst_caps_unref (candidate);
+ ret = TRUE;
+ goto done;
+ } else {
+ GST_WARNING_OBJECT (pad, "Invalid caps with framerate %d/%d", fps_n,
+ fps_d);
+ }
+ }
+ }
+ gst_caps_unref (candidate);
+ }
+
+done:
+ if (!ret)
+ GST_ERROR_OBJECT (pad, "No usable caps found");
+
+ gst_caps_unref (caps);
+ gst_object_unref (self);
+
+ return ret;
+}
+
+static GstCaps *
+gst_image_freeze_sink_getcaps (GstPad * pad)
+{
+ GstImageFreeze *self = GST_IMAGE_FREEZE (gst_pad_get_parent (pad));
+ GstCaps *ret, *tmp;
+
+ if (GST_PAD_CAPS (pad)) {
+ ret = gst_caps_copy (GST_PAD_CAPS (pad));
+ goto done;
+ }
+
+ tmp = gst_pad_peer_get_caps (self->srcpad);
+ if (tmp) {
+ ret = gst_caps_intersect (tmp, gst_pad_get_pad_template_caps (pad));
+ gst_caps_unref (tmp);
+ } else {
+ ret = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
+ }
+
+done:
+ gst_object_unref (self);
+
+ GST_LOG_OBJECT (pad, "Returning caps: %" GST_PTR_FORMAT, ret);
+
+ return ret;
+}
+
+static gboolean
+gst_image_freeze_sink_query (GstPad * pad, GstQuery * query)
+{
+ GstImageFreeze *self = GST_IMAGE_FREEZE (gst_pad_get_parent (pad));
+ gboolean ret;
+ GstPad *peer = gst_pad_get_peer (self->srcpad);
+
+ GST_LOG_OBJECT (pad, "Handling query of type '%s'",
+ gst_query_type_get_name (GST_QUERY_TYPE (query)));
+
+ if (!peer) {
+ GST_INFO_OBJECT (pad, "No peer yet, dropping query");
+ ret = FALSE;
+ } else {
+ ret = gst_pad_query (peer, query);
+ gst_object_unref (peer);
+ }
+
+ gst_object_unref (self);
+ return ret;
+}
+
+static gboolean
+gst_image_freeze_convert (GstImageFreeze * self,
+ GstFormat src_format, gint64 src_value,
+ GstFormat * dest_format, gint64 * dest_value)
+{
+ gboolean ret = FALSE;
+
+ if (src_format == *dest_format) {
+ *dest_value = src_value;
+ return TRUE;
+ }
+
+ if (src_value == -1) {
+ *dest_value = -1;
+ return TRUE;
+ }
+
+ switch (src_format) {
+ case GST_FORMAT_DEFAULT:{
+ switch (*dest_format) {
+ case GST_FORMAT_TIME:
+ GST_OBJECT_LOCK (self);
+ if (self->fps_n == 0)
+ *dest_value = -1;
+ else
+ *dest_value =
+ gst_util_uint64_scale (src_value, GST_SECOND * self->fps_d,
+ self->fps_n);
+ GST_OBJECT_UNLOCK (self);
+ ret = TRUE;
+ break;
+ default:
+ break;
+ }
+ }
+ case GST_FORMAT_TIME:{
+ switch (*dest_format) {
+ case GST_FORMAT_DEFAULT:
+ GST_OBJECT_LOCK (self);
+ *dest_value =
+ gst_util_uint64_scale (src_value, self->fps_n,
+ self->fps_d * GST_SECOND);
+ GST_OBJECT_UNLOCK (self);
+ ret = TRUE;
+ break;
+ default:
+ break;
+ }
+
+ }
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static const GstQueryType *
+gst_image_freeze_src_query_type (GstPad * pad)
+{
+ static const GstQueryType types[] = {
+ GST_QUERY_POSITION,
+ GST_QUERY_DURATION,
+ GST_QUERY_SEEKING,
+ GST_QUERY_CONVERT,
+ 0
+ };
+
+ return types;
+}
+
+static gboolean
+gst_image_freeze_src_query (GstPad * pad, GstQuery * query)
+{
+ GstImageFreeze *self = GST_IMAGE_FREEZE (gst_pad_get_parent (pad));
+ gboolean ret = FALSE;
+
+ GST_LOG_OBJECT (pad, "Handling query of type '%s'",
+ gst_query_type_get_name (GST_QUERY_TYPE (query)));
+
+ switch (GST_QUERY_TYPE (query)) {
+ case GST_QUERY_CONVERT:{
+ GstFormat src_format, dest_format;
+ gint64 src_value, dest_value;
+
+ gst_query_parse_convert (query, &src_format, &src_value, &dest_format,
+ &dest_value);
+ ret =
+ gst_image_freeze_convert (self, src_format, src_value, &dest_format,
+ &dest_value);
+ if (ret)
+ gst_query_set_convert (query, src_format, src_value, dest_format,
+ dest_value);
+ break;
+ }
+ case GST_QUERY_POSITION:{
+ GstFormat format;
+ gint64 position;
+
+ gst_query_parse_position (query, &format, NULL);
+ switch (format) {
+ case GST_FORMAT_DEFAULT:{
+ GST_OBJECT_LOCK (self);
+ position = self->offset;
+ GST_OBJECT_UNLOCK (self);
+ ret = TRUE;
+ }
+ case GST_FORMAT_TIME:{
+ GST_OBJECT_LOCK (self);
+ position = self->segment.last_stop;
+ GST_OBJECT_UNLOCK (self);
+ ret = TRUE;
+ }
+ default:
+ break;
+ }
+
+ if (ret) {
+ gst_query_set_position (query, format, position);
+ GST_DEBUG_OBJECT (pad,
+ "Returning position %" G_GINT64_FORMAT " in format %s", position,
+ gst_format_get_name (format));
+ } else {
+ GST_DEBUG_OBJECT (pad, "Position query failed");
+ }
+ break;
+ }
+ case GST_QUERY_DURATION:{
+ GstFormat format;
+ gint64 duration;
+
+ gst_query_parse_duration (query, &format, NULL);
+ switch (format) {
+ case GST_FORMAT_TIME:{
+ GST_OBJECT_LOCK (self);
+ duration = self->segment.stop;
+ GST_OBJECT_UNLOCK (self);
+ ret = TRUE;
+ }
+ case GST_FORMAT_DEFAULT:{
+ GST_OBJECT_LOCK (self);
+ duration = self->segment.stop;
+ if (duration != -1)
+ duration =
+ gst_util_uint64_scale (duration, self->fps_n,
+ GST_SECOND * self->fps_d);
+ GST_OBJECT_UNLOCK (self);
+ ret = TRUE;
+ }
+ default:
+ break;
+ }
+
+ if (ret) {
+ gst_query_set_duration (query, format, duration);
+ GST_DEBUG_OBJECT (pad,
+ "Returning duration %" G_GINT64_FORMAT " in format %s", duration,
+ gst_format_get_name (format));
+ } else {
+ GST_DEBUG_OBJECT (pad, "Duration query failed");
+ }
+ break;
+ }
+ case GST_QUERY_SEEKING:{
+ GstFormat format;
+ gboolean seekable;
+
+ gst_query_parse_seeking (query, &format, NULL, NULL, NULL);
+ seekable = (format == GST_FORMAT_TIME || format == GST_FORMAT_DEFAULT);
+
+ gst_query_set_seeking (query, format, seekable, (seekable ? 0 : -1), -1);
+ ret = TRUE;
+ break;
+ }
+ default:
+ ret = FALSE;
+ break;
+ }
+
+ gst_object_unref (self);
+ return ret;
+}
+
+
+static gboolean
+gst_image_freeze_sink_event (GstPad * pad, GstEvent * event)
+{
+ GstImageFreeze *self = GST_IMAGE_FREEZE (gst_pad_get_parent (pad));
+ gboolean ret;
+
+ GST_LOG_OBJECT (pad, "Got %s event", GST_EVENT_TYPE_NAME (event));
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_EOS:
+ case GST_EVENT_NEWSEGMENT:
+ GST_DEBUG_OBJECT (pad, "Dropping event");
+ gst_event_unref (event);
+ ret = TRUE;
+ break;
+ case GST_EVENT_FLUSH_START:
+ gst_image_freeze_reset (self);
+ /* fall through */
+ default:
+ ret = gst_pad_push_event (self->srcpad, event);
+ break;
+ }
+
+ gst_object_unref (self);
+ return ret;
+}
+
+static gboolean
+gst_image_freeze_src_event (GstPad * pad, GstEvent * event)
+{
+ GstImageFreeze *self = GST_IMAGE_FREEZE (gst_pad_get_parent (pad));
+ gboolean ret;
+
+ GST_LOG_OBJECT (pad, "Got %s event", GST_EVENT_TYPE_NAME (event));
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_NAVIGATION:
+ case GST_EVENT_QOS:
+ case GST_EVENT_LATENCY:
+ case GST_EVENT_STEP:
+ GST_DEBUG_OBJECT (pad, "Dropping event");
+ gst_event_unref (event);
+ ret = TRUE;
+ break;
+ case GST_EVENT_SEEK:{
+ gdouble rate;
+ GstFormat format;
+ GstSeekFlags flags;
+ GstSeekType start_type, stop_type;
+ gint64 start, stop;
+ gint64 last_stop;
+
+ gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
+ &stop_type, &stop);
+ gst_event_unref (event);
+
+ if (format != GST_FORMAT_TIME && format != GST_FORMAT_DEFAULT) {
+ GST_ERROR_OBJECT (pad, "Seek in invalid format: %s",
+ gst_format_get_name (format));
+ ret = FALSE;
+ break;
+ }
+
+ if (format == GST_FORMAT_DEFAULT) {
+ format = GST_FORMAT_TIME;
+ if (!gst_image_freeze_convert (self, GST_FORMAT_DEFAULT, start, &format,
+ &start)
+ || !gst_image_freeze_convert (self, GST_FORMAT_DEFAULT, stop,
+ &format, &stop)
+ || start == -1 || stop == -1) {
+ GST_ERROR_OBJECT (pad,
+ "Failed to convert seek from DEFAULT format into TIME format");
+ ret = FALSE;
+ break;
+ }
+ }
+
+ if ((flags & GST_SEEK_FLAG_FLUSH)) {
+ GstEvent *e;
+
+ e = gst_event_new_flush_start ();
+ gst_pad_push_event (self->srcpad, e);
+ } else {
+ gst_pad_pause_task (self->srcpad);
+ }
+
+ GST_PAD_STREAM_LOCK (self->srcpad);
+
+ GST_OBJECT_LOCK (self);
+ gst_event_replace (&self->close_segment, NULL);
+ self->close_segment =
+ gst_event_new_new_segment_full (TRUE, self->segment.rate,
+ self->segment.applied_rate, self->segment.format, self->segment.start,
+ self->segment.last_stop, self->segment.time);
+
+ gst_segment_set_seek (&self->segment, rate, format, flags, start_type,
+ start, stop_type, stop, NULL);
+ self->need_segment = TRUE;
+ last_stop = self->segment.last_stop;
+
+ GST_OBJECT_UNLOCK (self);
+
+ if ((flags & GST_SEEK_FLAG_FLUSH)) {
+ GstEvent *e;
+
+ e = gst_event_new_flush_stop ();
+ gst_pad_push_event (self->srcpad, e);
+ }
+
+ if (flags & GST_SEEK_FLAG_SEGMENT) {
+ GstMessage *m;
+
+ m = gst_message_new_segment_start (GST_OBJECT (self),
+ format, last_stop);
+ gst_element_post_message (GST_ELEMENT (self), m);
+ }
+
+ GST_PAD_STREAM_UNLOCK (self->srcpad);
+
+ GST_DEBUG_OBJECT (pad, "Seek successful");
+
+ gst_pad_start_task (self->srcpad,
+ (GstTaskFunction) gst_image_freeze_src_loop, self->srcpad);
+ ret = TRUE;
+ break;
+ }
+ case GST_EVENT_FLUSH_START:
+ gst_image_freeze_reset (self);
+ /* fall through */
+ default:
+ ret = gst_pad_push_event (self->sinkpad, event);
+ break;
+ }
+
+ gst_object_unref (self);
+ return ret;
+}
+
+static GstFlowReturn
+gst_image_freeze_sink_chain (GstPad * pad, GstBuffer * buffer)
+{
+ GstImageFreeze *self = GST_IMAGE_FREEZE (GST_PAD_PARENT (pad));
+ GstFlowReturn ret = GST_FLOW_OK;
+
+ GST_OBJECT_LOCK (self);
+ if (self->buffer) {
+ GST_DEBUG_OBJECT (pad, "Already have a buffer, dropping");
+ gst_buffer_unref (buffer);
+ GST_OBJECT_UNLOCK (self);
+ return ret;
+ }
+
+ self->buffer = buffer;
+ GST_OBJECT_UNLOCK (self);
+
+ gst_pad_start_task (self->srcpad, (GstTaskFunction) gst_image_freeze_src_loop,
+ self->srcpad);
+ return ret;
+}
+
+static void
+gst_image_freeze_src_loop (GstPad * pad)
+{
+ GstImageFreeze *self = GST_IMAGE_FREEZE (GST_PAD_PARENT (pad));
+ GstBuffer *buffer;
+ GstClockTime timestamp, duration;
+ gint64 cstart, cstop;
+ gboolean in_seg, eos;
+
+ GST_OBJECT_LOCK (self);
+ if (!self->buffer) {
+ GST_ERROR_OBJECT (pad, "Have no buffer yet");
+ GST_OBJECT_UNLOCK (self);
+ gst_pad_pause_task (self->srcpad);
+ return;
+ }
+ buffer = gst_buffer_ref (self->buffer);
+ buffer = gst_buffer_make_metadata_writable (buffer);
+ GST_OBJECT_UNLOCK (self);
+
+ if (self->close_segment) {
+ GST_DEBUG_OBJECT (pad, "Closing previous segment");
+ gst_pad_push_event (self->srcpad, self->close_segment);
+ self->close_segment = NULL;
+ }
+
+ if (self->need_segment) {
+ GstEvent *e;
+
+ GST_DEBUG_OBJECT (pad, "Pushing NEWSEGMENT event: %" GST_SEGMENT_FORMAT,
+ &self->segment);
+ e = gst_event_new_new_segment_full (FALSE, self->segment.rate,
+ self->segment.applied_rate, self->segment.format, self->segment.start,
+ self->segment.stop, self->segment.start);
+
+ GST_OBJECT_LOCK (self);
+ self->offset =
+ gst_util_uint64_scale (self->segment.start, self->fps_n,
+ self->fps_d * GST_SECOND);
+ GST_OBJECT_UNLOCK (self);
+
+ self->need_segment = FALSE;
+
+ gst_pad_push_event (self->srcpad, e);
+ }
+
+ GST_OBJECT_LOCK (self);
+ if (self->fps_n != 0) {
+ timestamp =
+ gst_util_uint64_scale (self->offset, self->fps_d * GST_SECOND,
+ self->fps_n);
+ duration = gst_util_uint64_scale_int (GST_SECOND, self->fps_d, self->fps_n);
+ } else {
+ timestamp = 0;
+ duration = GST_CLOCK_TIME_NONE;
+ }
+ eos = (self->segment.stop != -1 && timestamp > self->segment.stop) ||
+ (self->fps_n == 0 && self->offset > 0);
+
+ if (self->fps_n == 0 && self->offset > 0)
+ in_seg = FALSE;
+ else
+ in_seg =
+ gst_segment_clip (&self->segment, GST_FORMAT_TIME, timestamp,
+ timestamp + duration, &cstart, &cstop);
+
+ if (in_seg)
+ gst_segment_set_last_stop (&self->segment, GST_FORMAT_TIME, cstart);
+
+ self->offset++;
+ GST_OBJECT_UNLOCK (self);
+
+ GST_DEBUG_OBJECT (pad, "Handling buffer with timestamp %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (timestamp));
+
+ if (eos) {
+ if ((self->segment.flags & GST_SEEK_FLAG_SEGMENT)) {
+ GstMessage *m;
+
+ GST_DEBUG_OBJECT (pad, "Sending segment done at end of segment");
+ m = gst_message_new_segment_done (GST_OBJECT_CAST (self),
+ GST_FORMAT_TIME, self->segment.stop);
+ gst_element_post_message (GST_ELEMENT_CAST (self), m);
+ } else {
+ GST_DEBUG_OBJECT (pad, "Sending EOS at end of segment");
+ gst_pad_push_event (self->srcpad, gst_event_new_eos ());
+ }
+ gst_pad_pause_task (self->srcpad);
+ }
+
+ if (in_seg) {
+ GstFlowReturn ret;
+
+ GST_BUFFER_TIMESTAMP (buffer) = cstart;
+ GST_BUFFER_DURATION (buffer) = cstop - cstart;
+ gst_buffer_set_caps (buffer, GST_PAD_CAPS (self->srcpad));
+ ret = gst_pad_push (self->srcpad, buffer);
+ GST_DEBUG_OBJECT (pad, "Pushing buffer resulted in %s",
+ gst_flow_get_name (ret));
+ if (ret != GST_FLOW_OK)
+ gst_pad_pause_task (self->srcpad);
+ } else {
+ gst_buffer_unref (buffer);
+ }
+}
+
+static GstStateChangeReturn
+gst_image_freeze_change_state (GstElement * element, GstStateChange transition)
+{
+ GstImageFreeze *self = GST_IMAGE_FREEZE (element);
+ GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
+
+ switch (transition) {
+ case GST_STATE_CHANGE_READY_TO_PAUSED:
+ gst_image_freeze_reset (self);
+ break;
+ case GST_STATE_CHANGE_PAUSED_TO_READY:
+ gst_pad_stop_task (self->srcpad);
+ gst_image_freeze_reset (self);
+ break;
+ default:
+ break;
+ }
+
+ if (GST_ELEMENT_CLASS (parent_class)->change_state)
+ ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+ switch (transition) {
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+ GST_DEBUG_CATEGORY_INIT (gst_image_freeze_debug, "imagefreeze", 0,
+ "imagefreeze element");
+
+ if (!gst_element_register (plugin, "imagefreeze", GST_RANK_NONE,
+ GST_TYPE_IMAGE_FREEZE))
+ return FALSE;
+
+ return TRUE;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "imagefreeze",
+ "Still frame stream generator",
+ plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
projects / platform / upstream / gstreamer.git / commitdiff