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gst/alpha/: Make the various properties of 'alpha' controllable. This allows doing niceties like fade-in/fade-out.
Original commit message from CVS: * gst/alpha/Makefile.am: * gst/alpha/gstalpha.c: (gst_alpha_class_init), (gst_alpha_init), (gst_alpha_sink_event), (gst_alpha_chain), (gst_alpha_change_state), (plugin_init): Make the various properties of 'alpha' controllable. This allows doing niceties like fade-in/fade-out.
This commit is contained in:
Edward Hervey
parent
e7f919986a
commit
7f27c4a065
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@ -1,3 +1,12 @@
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2008-01-09 Edward Hervey <edward.hervey@collabora.co.uk>
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* gst/alpha/Makefile.am:
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* gst/alpha/gstalpha.c: (gst_alpha_class_init), (gst_alpha_init),
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(gst_alpha_sink_event), (gst_alpha_chain),
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(gst_alpha_change_state), (plugin_init):
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Make the various properties of 'alpha' controllable. This allows doing
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niceties like fade-in/fade-out.
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2008-01-09 Stefan Kost <ensonic@users.sf.net>
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* gst/rtp/gstasteriskh263.c:
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@ -2,8 +2,8 @@ plugin_LTLIBRARIES = libgstalpha.la libgstalphacolor.la
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libgstalpha_la_SOURCES = gstalpha.c
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libgstalpha_la_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) \
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$(GST_BASE_CFLAGS) $(GST_CFLAGS)
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libgstalpha_la_LIBADD = $(GST_LIBS) $(LIBM)
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$(GST_BASE_CFLAGS) $(GST_CFLAGS) $(GST_CONTROLLER_CFLAGS)
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libgstalpha_la_LIBADD = $(GST_LIBS) $(LIBM) $(GST_CONTROLLER_LIBS)
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libgstalpha_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
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libgstalphacolor_la_SOURCES = gstalphacolor.c
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@ -22,6 +22,7 @@
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#endif
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#include <gst/gst.h>
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#include <gst/video/video.h>
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#include <gst/controller/gstcontroller.h>
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#include <stdlib.h>
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#include <string.h>
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@ -58,6 +59,9 @@ GstAlphaMethod;
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#define ROUND_UP_4(x) (((x) + 3) & ~3)
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#define ROUND_UP_8(x) (((x) + 7) & ~7)
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#define GST_CAT_DEFAULT gst_alpha_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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struct _GstAlpha
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{
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GstElement element;
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@ -91,6 +95,8 @@ struct _GstAlpha
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guint8 accept_angle_ctg;
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guint8 one_over_kc;
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guint8 kfgy_scale;
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GstSegment segment;
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};
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struct _GstAlphaClass
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@ -163,6 +169,7 @@ static void gst_alpha_get_property (GObject * object, guint prop_id,
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static gboolean gst_alpha_sink_setcaps (GstPad * pad, GstCaps * caps);
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static GstFlowReturn gst_alpha_chain (GstPad * pad, GstBuffer * buffer);
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static gboolean gst_alpha_sink_event (GstPad * pad, GstEvent * event);
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static GstStateChangeReturn gst_alpha_change_state (GstElement * element,
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GstStateChange transition);
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@ -247,22 +254,28 @@ gst_alpha_class_init (GstAlphaClass * klass)
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DEFAULT_METHOD, (GParamFlags) G_PARAM_READWRITE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ALPHA,
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g_param_spec_double ("alpha", "Alpha", "The value for the alpha channel",
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0.0, 1.0, DEFAULT_ALPHA, (GParamFlags) G_PARAM_READWRITE));
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0.0, 1.0, DEFAULT_ALPHA,
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(GParamFlags) G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TARGET_R,
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g_param_spec_uint ("target_r", "Target Red", "The Red target", 0,
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255, DEFAULT_TARGET_R, (GParamFlags) G_PARAM_READWRITE));
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g_param_spec_uint ("target_r", "Target Red", "The Red target", 0, 255,
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DEFAULT_TARGET_R,
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(GParamFlags) G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TARGET_G,
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g_param_spec_uint ("target_g", "Target Green", "The Green target", 0,
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255, DEFAULT_TARGET_G, (GParamFlags) G_PARAM_READWRITE));
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g_param_spec_uint ("target_g", "Target Green", "The Green target", 0, 255,
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DEFAULT_TARGET_G,
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(GParamFlags) G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TARGET_B,
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g_param_spec_uint ("target_b", "Target Blue", "The Blue target",
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0, 255, DEFAULT_TARGET_B, (GParamFlags) G_PARAM_READWRITE));
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g_param_spec_uint ("target_b", "Target Blue", "The Blue target", 0, 255,
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DEFAULT_TARGET_B,
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(GParamFlags) G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ANGLE,
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g_param_spec_float ("angle", "Angle", "Size of the colorcube to change",
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0.0, 90.0, DEFAULT_ANGLE, (GParamFlags) G_PARAM_READWRITE));
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0.0, 90.0, DEFAULT_ANGLE,
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(GParamFlags) G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_NOISE_LEVEL,
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g_param_spec_float ("noise_level", "Noise Level", "Size of noise radius",
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0.0, 64.0, DEFAULT_NOISE_LEVEL, (GParamFlags) G_PARAM_READWRITE));
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0.0, 64.0, DEFAULT_NOISE_LEVEL,
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(GParamFlags) G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
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gstelement_class->change_state = gst_alpha_change_state;
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}
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@ -276,6 +289,7 @@ gst_alpha_init (GstAlpha * alpha)
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gst_element_add_pad (GST_ELEMENT (alpha), alpha->sinkpad);
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gst_pad_set_chain_function (alpha->sinkpad, gst_alpha_chain);
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gst_pad_set_setcaps_function (alpha->sinkpad, gst_alpha_sink_setcaps);
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gst_pad_set_event_function (alpha->sinkpad, gst_alpha_sink_event);
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alpha->srcpad =
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gst_pad_new_from_static_template (&gst_alpha_src_template, "src");
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@ -288,6 +302,8 @@ gst_alpha_init (GstAlpha * alpha)
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alpha->target_b = DEFAULT_TARGET_B;
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alpha->angle = DEFAULT_ANGLE;
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alpha->noise_level = DEFAULT_NOISE_LEVEL;
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GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "alpha", 0, "Alpha adding element");
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}
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/* do we need this function? */
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@ -790,6 +806,40 @@ gst_alpha_init_params (GstAlpha * alpha)
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alpha->kg = MIN (kgl, 127);
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}
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static gboolean
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gst_alpha_sink_event (GstPad * pad, GstEvent * event)
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{
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GstAlpha *alpha;
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gboolean ret;
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alpha = GST_ALPHA (GST_PAD_PARENT (pad));
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_FLUSH_STOP:
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gst_segment_init (&alpha->segment, GST_FORMAT_UNDEFINED);
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break;
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case GST_EVENT_NEWSEGMENT:{
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GstFormat format;
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gdouble rate, arate;
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gint64 start, stop, time;
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gboolean update;
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gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
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&start, &stop, &time);
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gst_segment_set_newsegment_full (&alpha->segment, update, rate, arate,
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format, start, stop, time);
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break;
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}
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default:
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break;
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}
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ret = gst_pad_push_event (alpha->srcpad, event);
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return ret;
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}
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static GstFlowReturn
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gst_alpha_chain (GstPad * pad, GstBuffer * buffer)
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{
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@ -797,6 +847,7 @@ gst_alpha_chain (GstPad * pad, GstBuffer * buffer)
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GstBuffer *outbuf;
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gint new_width, new_height;
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GstFlowReturn ret;
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GstClockTime timestamp;
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alpha = GST_ALPHA (GST_PAD_PARENT (pad));
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@ -824,6 +875,11 @@ gst_alpha_chain (GstPad * pad, GstBuffer * buffer)
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gst_buffer_set_caps (outbuf, GST_PAD_CAPS (alpha->srcpad));
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GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buffer);
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GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (buffer);
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timestamp = gst_segment_to_stream_time (&alpha->segment, GST_FORMAT_TIME,
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GST_BUFFER_TIMESTAMP (buffer));
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GST_LOG ("Got stream time of %" GST_TIME_FORMAT, GST_TIME_ARGS (timestamp));
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if (GST_CLOCK_TIME_IS_VALID (timestamp))
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gst_object_sync_values (G_OBJECT (alpha), timestamp);
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switch (alpha->method) {
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case ALPHA_METHOD_SET:
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@ -852,6 +908,16 @@ gst_alpha_chain (GstPad * pad, GstBuffer * buffer)
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gst_buffer_unref (buffer);
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/* Update last stop position in segment */
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if (GST_BUFFER_TIMESTAMP (outbuf) != GST_CLOCK_TIME_NONE) {
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GstClockTime last_stop = GST_BUFFER_TIMESTAMP (outbuf);
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if (GST_BUFFER_DURATION (outbuf) != GST_CLOCK_TIME_NONE)
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last_stop += GST_BUFFER_DURATION (outbuf);
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gst_segment_set_last_stop (&alpha->segment, GST_FORMAT_TIME, last_stop);
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}
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ret = gst_pad_push (alpha->srcpad, outbuf);
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return ret;
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@ -869,6 +935,7 @@ gst_alpha_change_state (GstElement * element, GstStateChange transition)
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case GST_STATE_CHANGE_NULL_TO_READY:
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break;
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case GST_STATE_CHANGE_READY_TO_PAUSED:
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gst_segment_init (&alpha->segment, GST_FORMAT_UNDEFINED);
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gst_alpha_init_params (alpha);
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break;
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case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
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@ -892,6 +959,8 @@ gst_alpha_change_state (GstElement * element, GstStateChange transition)
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static gboolean
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plugin_init (GstPlugin * plugin)
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{
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gst_controller_init (NULL, NULL);
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return gst_element_register (plugin, "alpha", GST_RANK_NONE, GST_TYPE_ALPHA);
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}
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