--- /dev/null
+/* GStreamer
+ * Copyright (C) 2004 Benjamin Otte <otte@gnome.org>
+ *
+ * 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/gst.h>
+#include <gst/video/video.h>
+/* FIXME !
+ * This is a bit hacky, but we only do 1 image per incoming buffer. And since
+ * those buffers have undefined sizes we need to make sure we have an undefined
+ * framerate. */
+#undef GST_VIDEO_FPS_RANGE
+#define GST_VIDEO_FPS_RANGE "(double) 0"
+#include <gst/audio/audio.h>
+#include <libvisual/libvisual.h>
+
+#define GST_TYPE_VISUAL (gst_visual_get_type())
+#define GST_IS_VISUAL(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VISUAL))
+#define GST_VISUAL(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VISUAL,GstVisual))
+#define GST_IS_VISUAL_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VISUAL))
+#define GST_VISUAL_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VISUAL,GstVisualClass))
+#define GST_VISUAL_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_VISUAL, GstVisualClass))
+
+typedef struct _GstVisual GstVisual;
+typedef struct _GstVisualClass GstVisualClass;
+
+struct _GstVisual
+{
+ GstElement element;
+
+ /* pads */
+ GstPad *sinkpad;
+ GstPad *srcpad;
+
+ /* libvisual stuff */
+ VisAudio audio;
+ VisVideo *video;
+ VisActor *actor;
+
+ /* audio/video state */
+ gint rate;
+ gdouble fps;
+ gint width;
+ gint height;
+};
+
+struct _GstVisualClass
+{
+ GstElementClass parent_class;
+
+ VisPluginRef *plugin;
+};
+
+GType gst_visual_get_type (void);
+
+
+static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS (GST_VIDEO_CAPS_BGRx_HOST_ENDIAN "; "
+ GST_VIDEO_CAPS_BGR "; " GST_VIDEO_CAPS_RGB_16)
+ );
+
+static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("audio/x-raw-int, "
+ "width = (int) 16, "
+ "depth = (int) 16, "
+ "endianness = (int) BYTE_ORDER, "
+ "signed = (boolean) TRUE, "
+ "channels = (int) 2, " "rate = (int) [ 1000, MAX ]")
+ );
+
+
+static void gst_visual_class_init (gpointer g_class, gpointer class_data);
+static void gst_visual_init (GstVisual * visual);
+
+static GstElementStateReturn gst_visual_change_state (GstElement * element);
+static void gst_visual_chain (GstPad * pad, GstData * _data);
+
+static GstPadLinkReturn gst_visual_sinklink (GstPad * pad,
+ const GstCaps * caps);
+static GstPadLinkReturn gst_visual_srclink (GstPad * pad, const GstCaps * caps);
+static GstCaps *gst_visual_getcaps (GstPad * pad);
+
+static GstElementClass *parent_class = NULL;
+
+GType
+gst_visual_get_type (void)
+{
+ static GType type = 0;
+
+ if (!type) {
+ static const GTypeInfo info = {
+ sizeof (GstVisualClass),
+ NULL,
+ NULL,
+ gst_visual_class_init,
+ NULL,
+ NULL,
+ sizeof (GstVisual),
+ 0,
+ (GInstanceInitFunc) gst_visual_init,
+ };
+
+ type = g_type_register_static (GST_TYPE_ELEMENT, "GstVisual", &info, 0);
+ }
+ return type;
+}
+
+static void
+gst_visual_class_init (gpointer g_class, gpointer class_data)
+{
+ GstVisualClass *klass = GST_VISUAL_CLASS (g_class);
+ GstElementClass *element = GST_ELEMENT_CLASS (klass);
+
+ klass->plugin = class_data;
+
+ element->change_state = gst_visual_change_state;
+
+ if (class_data == NULL) {
+ parent_class = g_type_class_peek_parent (g_class);
+ } else {
+ GstElementDetails details = {
+ NULL,
+ "Visualization",
+ klass->plugin->info->about,
+ "Benjamin Otte <otte@gnome.org>"
+ };
+
+ details.longname = g_strdup_printf ("libvisual %s plugin v.%s",
+ klass->plugin->info->name, klass->plugin->info->version);
+
+ /* FIXME: improve to only register what plugin supports? */
+ gst_element_class_add_pad_template (element,
+ gst_static_pad_template_get (&src_template));
+ gst_element_class_add_pad_template (element,
+ gst_static_pad_template_get (&sink_template));
+ gst_element_class_set_details (element, &details);
+ g_free (details.longname);
+ }
+
+}
+
+static void
+gst_visual_init (GstVisual * visual)
+{
+ /* create the sink and src pads */
+ visual->sinkpad =
+ gst_pad_new_from_template (gst_static_pad_template_get (&sink_template),
+ "sink");
+ gst_pad_set_link_function (visual->sinkpad, gst_visual_sinklink);
+ gst_pad_set_chain_function (visual->sinkpad, gst_visual_chain);
+ gst_element_add_pad (GST_ELEMENT (visual), visual->sinkpad);
+
+ visual->srcpad =
+ gst_pad_new_from_template (gst_static_pad_template_get (&src_template),
+ "src");
+ gst_pad_set_link_function (visual->srcpad, gst_visual_srclink);
+ gst_pad_set_getcaps_function (visual->srcpad, gst_visual_getcaps);
+ gst_element_add_pad (GST_ELEMENT (visual), visual->srcpad);
+
+}
+
+static GstCaps *
+gst_visual_getcaps (GstPad * pad)
+{
+ GstCaps *ret;
+ GstVisual *visual = GST_VISUAL (gst_pad_get_parent (pad));
+
+ if (!visual->actor)
+ return gst_caps_copy (gst_pad_get_pad_template_caps (visual->srcpad));
+
+ ret = gst_caps_new_empty ();
+ if (visual_actor_depth_is_supported (visual->actor,
+ VISUAL_VIDEO_CONTEXT_32BIT) == 1) {
+ gst_caps_append (ret,
+ gst_caps_from_string (GST_VIDEO_CAPS_BGRx_HOST_ENDIAN));
+ }
+ if (visual_actor_depth_is_supported (visual->actor,
+ VISUAL_VIDEO_CONTEXT_24BIT) == 1) {
+ gst_caps_append (ret, gst_caps_from_string (GST_VIDEO_CAPS_BGR));
+ }
+ if (visual_actor_depth_is_supported (visual->actor,
+ VISUAL_VIDEO_CONTEXT_16BIT) == 1) {
+ gst_caps_append (ret, gst_caps_from_string (GST_VIDEO_CAPS_RGB_16));
+ }
+ return ret;
+}
+
+static GstPadLinkReturn
+gst_visual_srclink (GstPad * pad, const GstCaps * caps)
+{
+ GstVisual *visual = GST_VISUAL (gst_pad_get_parent (pad));
+ GstStructure *structure;
+ gint depth;
+
+ structure = gst_caps_get_structure (caps, 0);
+
+ if (!gst_structure_get_int (structure, "width", &visual->width))
+ return GST_PAD_LINK_REFUSED;
+ if (!gst_structure_get_int (structure, "height", &visual->height))
+ return GST_PAD_LINK_REFUSED;
+ if (!gst_structure_get_double (structure, "framerate", &visual->fps))
+ return GST_PAD_LINK_REFUSED;
+ if (!gst_structure_get_int (structure, "bpp", &depth))
+ return GST_PAD_LINK_REFUSED;
+
+ if (visual->video)
+ visual_video_free (visual->video);
+ visual->video = visual_video_new ();
+ visual_actor_set_video (visual->actor, visual->video);
+ visual_video_set_opts (visual->video, "depth",
+ visual_video_depth_enum_from_value (depth));
+ visual_video_set_dimension (visual->video, visual->width, visual->height);
+ visual_actor_video_negotiate (visual->actor);
+
+ return GST_PAD_LINK_OK;
+}
+
+static GstPadLinkReturn
+gst_visual_sinklink (GstPad * pad, const GstCaps * caps)
+{
+ GstVisual *visual = GST_VISUAL (gst_pad_get_parent (pad));
+ GstStructure *structure;
+
+ structure = gst_caps_get_structure (caps, 0);
+
+ gst_structure_get_int (structure, "rate", &visual->rate);
+
+ return GST_PAD_LINK_OK;
+}
+
+static void
+gst_visual_chain (GstPad * pad, GstData * _data)
+{
+ GstBuffer *ret, *buffer = GST_BUFFER (_data);
+ guint i, size = GST_BUFFER_SIZE (buffer) / 4;
+ guint16 *data = (guint16 *) GST_BUFFER_DATA (buffer);
+ GstVisual *visual = GST_VISUAL (gst_pad_get_parent (pad));
+
+ if (size < 512) {
+ /* FIXME */
+ GST_WARNING_OBJECT (visual, "incoming buffer to small, discarding.");
+ gst_data_unref (_data);
+ return;
+ }
+
+ for (i = 0; i < 512; i++) {
+ visual->audio.plugpcm[0][i] = *data++;
+ visual->audio.plugpcm[1][i] = *data++;
+ }
+ ret = gst_pad_alloc_buffer (visual->srcpad, GST_BUFFER_OFFSET_NONE,
+ visual->video->width * visual->video->width * visual->video->bpp);
+ visual_video_set_buffer (visual->video, GST_BUFFER_DATA (ret));
+ visual_actor_run (visual->actor, &visual->audio);
+ GST_BUFFER_TIMESTAMP (ret) = GST_BUFFER_TIMESTAMP (buffer);
+ GST_BUFFER_DURATION (ret) = GST_SECOND / visual->fps;
+ gst_data_unref (_data);
+ gst_pad_push (visual->srcpad, GST_DATA (ret));
+ /* so we're on the safe side */
+ visual_video_set_buffer (visual->video, NULL);
+}
+
+static GstElementStateReturn
+gst_visual_change_state (GstElement * element)
+{
+ GstVisual *visual = GST_VISUAL (element);
+
+ switch (GST_STATE_TRANSITION (element)) {
+ case GST_STATE_NULL_TO_READY:
+ visual->actor =
+ visual_actor_new (GST_VISUAL_GET_CLASS (visual)->plugin->name);
+ if (!visual->actor)
+ return GST_STATE_FAILURE;
+ if (visual_actor_realize (visual->actor) != 0) {
+ visual_actor_free (visual->actor);
+ visual->actor = NULL;
+ return GST_STATE_FAILURE;
+ }
+ break;
+ case GST_STATE_READY_TO_PAUSED:
+ break;
+ case GST_STATE_PAUSED_TO_PLAYING:
+ break;
+ case GST_STATE_PLAYING_TO_PAUSED:
+ break;
+ case GST_STATE_PAUSED_TO_READY:
+ break;
+ case GST_STATE_READY_TO_NULL:
+ visual_actor_destroy (visual->actor);
+ visual->actor = NULL;
+ break;
+ default:
+ g_assert_not_reached ();
+ }
+
+ if (GST_ELEMENT_CLASS (parent_class)->change_state)
+ return GST_ELEMENT_CLASS (parent_class)->change_state (element);
+
+ return GST_STATE_SUCCESS;
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+ guint i;
+ VisList *list;
+
+ if (visual_init (NULL, NULL) != 0)
+ return FALSE;
+
+ list = visual_actor_get_list ();
+ for (i = 0; i < visual_list_count (list); i++) {
+ VisPluginRef *ref = visual_list_get (list, i);
+ GType type;
+ gchar *name;
+ GTypeInfo info = {
+ sizeof (GstVisualClass),
+ NULL,
+ NULL,
+ gst_visual_class_init,
+ NULL,
+ ref,
+ sizeof (GstVisual),
+ 0,
+ NULL
+ };
+
+ if (ref->name == NULL)
+ continue;
+ name = g_strdup_printf ("GstVisual%s", ref->name);
+ type = g_type_register_static (GST_TYPE_VISUAL, name, &info, 0);
+ g_free (name);
+ name = g_strdup_printf ("libvisual_%s", ref->name);
+ if (!gst_element_register (plugin, name, GST_RANK_NONE, type)) {
+ g_free (name);
+ return FALSE;
+ }
+ g_free (name);
+ }
+
+ return TRUE;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "libvisual",
+ "libvisual visualization plugins",
+ plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN)
projects / platform / upstream / gstreamer.git / commitdiff