added sdl

Original commit message from CVS:
added sdl

1 files changed, 394 insertions, 0 deletions

diff --git a/ext/sdl/sdlvideosink.c b/ext/sdl/sdlvideosink.c
new file mode 100644
index 00000000..10e1ca7d
--- /dev/null
+++ b/ext/sdl/sdlvideosink.c
@@ -0,0 +1,394 @@
+/* GStreamer SDL plugin
+ * Copyright (C) 2001 Ronald Bultje <rbultje@ronald.bitfreak.net>
+ *
+ * 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.
+ */
+
+/* let's not forget to mention that all this was based on aasink ;-) */
+
+#include <config.h>
+#include <signal.h>
+#include <string.h>
+#include <sys/time.h>
+
+#include "sdlvideosink.h"
+
+static GstElementDetails gst_sdlvideosink_details = {
+  "Video sink",
+  "Sink/Video",
+  "An SDL-based videosink",
+  VERSION,
+  "Ronald Bultje <rbultje@ronald.bitfreak.net>",
+  "(C) 2001",
+};
+
+/* sdlvideosink signals and args */
+enum {
+  SIGNAL_FRAME_DISPLAYED,
+  SIGNAL_HAVE_SIZE,
+  LAST_SIGNAL
+};
+
+
+enum {
+  ARG_0,
+  ARG_WIDTH,
+  ARG_HEIGHT,
+  ARG_DRIVER,
+  ARG_DITHER,
+  ARG_BRIGHTNESS,
+  ARG_CONTRAST,
+  ARG_GAMMA,
+  ARG_INVERSION,
+  ARG_RANDOMVAL,
+  ARG_FRAMES_DISPLAYED,
+  ARG_FRAME_TIME,
+};
+
+GST_PADTEMPLATE_FACTORY (sink_template,
+  "sink",
+  GST_PAD_SINK,
+  GST_PAD_ALWAYS,
+  GST_CAPS_NEW (
+    "sdlvideosink_caps",
+    "video/raw",
+      "format", 	GST_PROPS_FOURCC (GST_STR_FOURCC ("I420")),
+        "width", 	GST_PROPS_INT_RANGE (0, G_MAXINT),
+        "height", 	GST_PROPS_INT_RANGE (0, G_MAXINT)
+  )
+)
+    
+static void	gst_sdlvideosink_class_init		(GstSDLVideoSinkClass *klass);
+static void	gst_sdlvideosink_init			(GstSDLVideoSink *sdlvideosink);
+
+static void	gst_sdlvideosink_chain			(GstPad *pad, GstBuffer *buf);
+
+static void	gst_sdlvideosink_set_property		(GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
+static void	gst_sdlvideosink_get_property		(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
+static void	gst_sdlvideosink_close			(GstSDLVideoSink *sdlvideosink);
+static GstElementStateReturn gst_sdlvideosink_change_state (GstElement *element);
+
+static GstElementClass *parent_class = NULL;
+static guint gst_sdlvideosink_signals[LAST_SIGNAL] = { 0 };
+
+GType
+gst_sdlvideosink_get_type (void)
+{
+  static GType sdlvideosink_type = 0;
+
+  if (!sdlvideosink_type) {
+    static const GTypeInfo sdlvideosink_info = {
+      sizeof(GstSDLVideoSinkClass),      NULL,
+      NULL,
+      (GClassInitFunc)gst_sdlvideosink_class_init,
+      NULL,
+      NULL,
+      sizeof(GstSDLVideoSink),
+      0,
+      (GInstanceInitFunc)gst_sdlvideosink_init,
+    };
+    sdlvideosink_type = g_type_register_static(GST_TYPE_ELEMENT, "GstSDLVideoSink", &sdlvideosink_info, 0);
+  }
+  return sdlvideosink_type;
+}
+
+static void
+gst_sdlvideosink_class_init (GstSDLVideoSinkClass *klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+
+  gobject_class = (GObjectClass*)klass;
+  gstelement_class = (GstElementClass*)klass;
+
+  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_WIDTH,
+    g_param_spec_int("width","width","width",
+                     G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_HEIGHT,
+    g_param_spec_int("height","height","height",
+                     G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_BRIGHTNESS,
+    g_param_spec_int("brightness","brightness","brightness",
+                     G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_CONTRAST,
+    g_param_spec_int("contrast","contrast","contrast",
+                     G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_GAMMA,
+    g_param_spec_float("gamma","gamma","gamma",
+                       0.0,5.0,1.0,G_PARAM_READWRITE)); // CHECKME
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_INVERSION,
+    g_param_spec_boolean("inversion","inversion","inversion",
+                         TRUE,G_PARAM_READWRITE)); // CHECKME
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_RANDOMVAL,
+    g_param_spec_int("randomval","randomval","randomval",
+                     G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); // CHECKME
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FRAMES_DISPLAYED,
+    g_param_spec_int("frames_displayed","frames_displayed","frames_displayed",
+                     G_MININT,G_MAXINT,0,G_PARAM_READABLE)); // CHECKME
+  g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_FRAME_TIME,
+    g_param_spec_int("frame_time","frame_time","frame_time",
+                     G_MININT,G_MAXINT,0,G_PARAM_READABLE)); // CHECKME
+
+  gobject_class->set_property = gst_sdlvideosink_set_property;
+  gobject_class->get_property = gst_sdlvideosink_get_property;
+
+  gst_sdlvideosink_signals[SIGNAL_FRAME_DISPLAYED] =
+    g_signal_new ("frame_displayed", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
+                   G_STRUCT_OFFSET (GstSDLVideoSinkClass, frame_displayed), NULL, NULL,
+                   g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
+  gst_sdlvideosink_signals[SIGNAL_HAVE_SIZE] =
+    g_signal_new ("have_size", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
+                   G_STRUCT_OFFSET (GstSDLVideoSinkClass, have_size), NULL, NULL,
+                   gst_marshal_VOID__INT_INT, G_TYPE_NONE, 2,
+		   G_TYPE_UINT, G_TYPE_UINT);
+
+
+  gstelement_class->change_state = gst_sdlvideosink_change_state;
+}
+
+static void
+gst_sdlvideosink_newcaps (GstPad *pad, GstCaps *caps)
+{
+  GstSDLVideoSink *sdlvideosink;
+  gulong print_format;
+
+  sdlvideosink = GST_SDLVIDEOSINK (gst_pad_get_parent (pad));
+
+  sdlvideosink->width =  gst_caps_get_int (caps, "width");
+  sdlvideosink->height =  gst_caps_get_int (caps, "height");
+
+  print_format = GULONG_FROM_LE (sdlvideosink->format);
+
+  sdlvideosink->screen = SDL_SetVideoMode(sdlvideosink->width, sdlvideosink->height,
+    0, SDL_SWSURFACE);
+  if ( sdlvideosink->screen == NULL /* || sdlvideosink->buffer == NULL */) {
+    GST_ERROR(0, "SDL: Couldn't set %dx%d: %s", sdlvideosink->width,
+      sdlvideosink->height, SDL_GetError());
+    printf("error\n");
+    return;
+  }
+  else {
+    GST_DEBUG(0, "SDL: Set %dx%d @ %d bpp\n", sdlvideosink->width,
+      sdlvideosink->height, sdlvideosink->screen->format->BitsPerPixel);
+  }
+
+  sdlvideosink->yuv_overlay = SDL_CreateYUVOverlay(sdlvideosink->width, sdlvideosink->height,
+    SDL_IYUV_OVERLAY, sdlvideosink->screen);
+  if ( sdlvideosink->yuv_overlay == NULL ) {
+    GST_ERROR(0, "SDL: Couldn't create SDL_yuv_overlay: %s\n", SDL_GetError());
+    return;
+  }
+
+  sdlvideosink->rect.x = 0;
+  sdlvideosink->rect.y = 0;
+  sdlvideosink->rect.w = sdlvideosink->width;
+  sdlvideosink->rect.h = sdlvideosink->height;
+  SDL_DisplayYUVOverlay(sdlvideosink->yuv_overlay, &(sdlvideosink->rect));
+
+  /* make stupid SDL *not* react on SIGINT */
+  signal(SIGINT, SIG_DFL);
+
+  GST_DEBUG (0, "sdlvideosink: setting %08lx (%4.4s)\n", sdlvideosink->format, (gchar*)&print_format);
+  
+  g_signal_emit (G_OBJECT (sdlvideosink), gst_sdlvideosink_signals[SIGNAL_HAVE_SIZE], 0,
+		  sdlvideosink->width, sdlvideosink->height);
+}
+
+static void
+gst_sdlvideosink_init (GstSDLVideoSink *sdlvideosink)
+{
+  sdlvideosink->sinkpad = gst_pad_new_from_template (
+		  GST_PADTEMPLATE_GET (sink_template), "sink");
+  gst_element_add_pad (GST_ELEMENT (sdlvideosink), sdlvideosink->sinkpad);
+  gst_pad_set_chain_function (sdlvideosink->sinkpad, gst_sdlvideosink_chain);
+  gst_pad_set_newcaps_function (sdlvideosink->sinkpad, gst_sdlvideosink_newcaps);
+
+  sdlvideosink->clock = gst_clock_get_system();
+  gst_clock_register(sdlvideosink->clock, GST_OBJECT(sdlvideosink));
+
+  sdlvideosink->width = -1;
+  sdlvideosink->height = -1;
+
+  GST_FLAG_SET(sdlvideosink, GST_ELEMENT_THREAD_SUGGESTED);
+}
+
+static void
+gst_sdlvideosink_chain (GstPad *pad, GstBuffer *buf)
+{
+  GstSDLVideoSink *sdlvideosink;
+  GstClockTimeDiff jitter;
+
+  g_return_if_fail (pad != NULL);
+  g_return_if_fail (GST_IS_PAD (pad));
+  g_return_if_fail (buf != NULL);
+
+  sdlvideosink = GST_SDLVIDEOSINK (gst_pad_get_parent (pad));
+
+  if (!GST_BUFFER_FLAG_IS_SET(buf, GST_BUFFER_FLUSH)) {
+    GST_DEBUG (0,"videosink: clock wait: %llu\n", GST_BUFFER_TIMESTAMP(buf));
+
+    jitter = gst_clock_current_diff(sdlvideosink->clock, GST_BUFFER_TIMESTAMP (buf));
+
+    if (jitter > 500000 || jitter < -500000)
+    {
+      GST_DEBUG (0, "jitter: %lld\n", jitter);
+      gst_clock_set (sdlvideosink->clock, GST_BUFFER_TIMESTAMP (buf));
+    }
+    else {
+      gst_clock_wait(sdlvideosink->clock, GST_BUFFER_TIMESTAMP(buf), GST_OBJECT(sdlvideosink));
+    }
+  }
+
+  /* Lock SDL/yuv-overlay */
+  if ( SDL_LockSurface(sdlvideosink->screen) < 0 ) {
+    GST_ERROR(0, "SDL_LockSurface(sdlvideosink->screen) < 0");
+    return;
+  }
+  if (SDL_LockYUVOverlay(sdlvideosink->yuv_overlay) < 0) {
+    GST_ERROR(0, "SDL_LockYUVOverlay(sdlvideosink->yuv_overlay) < 0");
+    return;
+  }
+
+  /* buf->yuv */
+  sdlvideosink->yuv[0] = GST_BUFFER_DATA(buf);
+  sdlvideosink->yuv[1] = sdlvideosink->yuv[0] + sdlvideosink->width*sdlvideosink->height;
+  sdlvideosink->yuv[2] = sdlvideosink->yuv[1] + sdlvideosink->width*sdlvideosink->height/4;
+
+  /* let's draw the data (*yuv[3]) on a SDL screen (*buffer) */
+  sdlvideosink->yuv_overlay->pixels = sdlvideosink->yuv;
+
+  /* Unlock SDL_yuv_overlay */
+  SDL_UnlockYUVOverlay(sdlvideosink->yuv_overlay);
+  SDL_UnlockSurface(sdlvideosink->screen);
+
+  /* Show, baby, show! */
+  SDL_DisplayYUVOverlay(sdlvideosink->yuv_overlay, &(sdlvideosink->rect));
+  SDL_UpdateRect(sdlvideosink->screen, 0, 0, sdlvideosink->width, sdlvideosink->height);
+
+  g_signal_emit(G_OBJECT(sdlvideosink),gst_sdlvideosink_signals[SIGNAL_FRAME_DISPLAYED],0);
+
+  gst_buffer_unref(buf);
+}
+
+
+static void
+gst_sdlvideosink_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
+{
+  GstSDLVideoSink *sdlvideosink;
+
+  /* it's not null if we got it, but it might not be ours */
+  g_return_if_fail (GST_IS_SDLVIDEOSINK (object));
+
+  sdlvideosink = GST_SDLVIDEOSINK (object);
+}
+
+static void
+gst_sdlvideosink_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
+{
+  GstSDLVideoSink *sdlvideosink;
+
+  /* it's not null if we got it, but it might not be ours */
+  sdlvideosink = GST_SDLVIDEOSINK(object);
+
+  switch (prop_id) {
+    case ARG_FRAMES_DISPLAYED: {
+      g_value_set_int (value, sdlvideosink->frames_displayed);
+      break;
+    }
+    case ARG_FRAME_TIME: {
+      g_value_set_int (value, sdlvideosink->frame_time/1000000);
+      break;
+    }
+    default: {
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+  }
+}
+
+static gboolean
+gst_sdlvideosink_open (GstSDLVideoSink *sdlvideosink)
+{
+  g_return_val_if_fail (!GST_FLAG_IS_SET (sdlvideosink ,GST_SDLVIDEOSINK_OPEN), FALSE);
+
+  /* Initialize the SDL library */
+  if( SDL_Init(SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE) < 0 ) {
+    GST_ERROR(0, "Couldn't initialize SDL: %s\n", SDL_GetError());
+    return FALSE;
+  }
+  GST_FLAG_SET (sdlvideosink, GST_SDLVIDEOSINK_OPEN);
+
+  return TRUE;
+}
+
+static void
+gst_sdlvideosink_close (GstSDLVideoSink *sdlvideosink)
+{
+  g_return_if_fail (GST_FLAG_IS_SET (sdlvideosink ,GST_SDLVIDEOSINK_OPEN));
+
+  SDL_FreeYUVOverlay(sdlvideosink->yuv_overlay);
+  SDL_Quit();
+
+  GST_FLAG_UNSET (sdlvideosink, GST_SDLVIDEOSINK_OPEN);
+}
+
+static GstElementStateReturn
+gst_sdlvideosink_change_state (GstElement *element)
+{
+  g_return_val_if_fail (GST_IS_SDLVIDEOSINK (element), GST_STATE_FAILURE);
+
+  if (GST_STATE_PENDING (element) == GST_STATE_NULL) {
+    if (GST_FLAG_IS_SET (element, GST_SDLVIDEOSINK_OPEN))
+      gst_sdlvideosink_close (GST_SDLVIDEOSINK (element));
+  } else {
+    if (!GST_FLAG_IS_SET (element, GST_SDLVIDEOSINK_OPEN)) {
+      if (!gst_sdlvideosink_open (GST_SDLVIDEOSINK (element)))
+        return GST_STATE_FAILURE;
+    }
+  }
+
+  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 (GModule *module, GstPlugin *plugin)
+{
+  GstElementFactory *factory;
+
+  /* create an elementfactory for the sdlvideosink element */
+  factory = gst_elementfactory_new("sdlvideosink",GST_TYPE_SDLVIDEOSINK,
+                                   &gst_sdlvideosink_details);
+  g_return_val_if_fail(factory != NULL, FALSE);
+
+  gst_elementfactory_add_padtemplate (factory, 
+		  GST_PADTEMPLATE_GET (sink_template));
+
+  gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
+
+  return TRUE;
+}
+
+GstPluginDesc plugin_desc = {
+  GST_VERSION_MAJOR,
+  GST_VERSION_MINOR,
+  "sdlvideosink",
+  plugin_init
+};