mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-12-24 01:00:37 +00:00
Code Issues 1 Projects Releases Wiki Activity

gst/videomixer/videomixer.c: Avoid divide by zero, choose masterpad as the pad with the highest framerate.

Browse source 
Original commit message from CVS:
* gst/videomixer/videomixer.c: (gst_videomixer_pad_get_type),
(gst_videomixer_pad_class_init), (gst_videomixer_pad_get_property),
(gst_videomixer_pad_set_property),
(gst_videomixer_pad_sinkconnect), (gst_videomixer_pad_init),
(gst_video_mixer_background_get_type), (gst_videomixer_get_type),
(gst_videomixer_class_init), (gst_videomixer_init),
(gst_videomixer_request_new_pad), (gst_videomixer_blend_ayuv_i420),
(pad_zorder_compare), (gst_videomixer_sort_pads),
(gst_videomixer_fill_checker), (gst_videomixer_fill_color),
(gst_videomixer_fill_queues), (gst_videomixer_blend_buffers),
(gst_videomixer_update_queues), (gst_videomixer_loop),
(plugin_init):
Avoid divide by zero, choose masterpad as the pad with the highest
framerate.
This commit is contained in:
Wim Taymans 2004-06-28 07:28:49 +00:00
parent 599383ccbc
commit ecba04a8bc
2 changed files with 74 additions and 28 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

17
ChangeLog
View file

@ -1,3 +1,20 @@
2004-06-28 Wim Taymans <wim@fluendo.com>
* gst/videomixer/videomixer.c: (gst_videomixer_pad_get_type),
(gst_videomixer_pad_class_init), (gst_videomixer_pad_get_property),
(gst_videomixer_pad_set_property),
(gst_videomixer_pad_sinkconnect), (gst_videomixer_pad_init),
(gst_video_mixer_background_get_type), (gst_videomixer_get_type),
(gst_videomixer_class_init), (gst_videomixer_init),
(gst_videomixer_request_new_pad), (gst_videomixer_blend_ayuv_i420),
(pad_zorder_compare), (gst_videomixer_sort_pads),
(gst_videomixer_fill_checker), (gst_videomixer_fill_color),
(gst_videomixer_fill_queues), (gst_videomixer_blend_buffers),
(gst_videomixer_update_queues), (gst_videomixer_loop),
(plugin_init):
Avoid divide by zero, choose masterpad as the pad with the highest
framerate.
2004-06-27 Julien Moutte <julien@moutte.net>
* sys/ximage/ximagesink.c: (gst_ximagesink_xwindow_decorate),

85
gst/videomixer/videomixer.c
View file

@ -40,6 +40,21 @@ GST_DEBUG_CATEGORY_STATIC (gst_videomixer_debug);
typedef struct _GstVideoMixerPad GstVideoMixerPad;
typedef struct _GstVideoMixerPadClass GstVideoMixerPadClass;
#define GST_TYPE_VIDEO_MIXER (gst_videomixer_get_type())
#define GST_VIDEO_MIXER(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_MIXER, GstVideoMixer))
#define GST_VIDEO_MIXER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_MIXER, GstVideoMixerClass))
#define GST_IS_VIDEO_MIXER(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_MIXER))
#define GST_IS_VIDEO_MIXER_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_MIXER))
static GType gst_videomixer_get_type (void);
typedef struct _GstVideoMixer GstVideoMixer;
typedef struct _GstVideoMixerClass GstVideoMixerClass;
static void gst_videomixer_pad_base_init (gpointer g_class);
static void gst_videomixer_pad_class_init (GstVideoMixerPadClass * klass);
static void gst_videomixer_pad_init (GstVideoMixerPad * mixerpad);
@ -49,6 +64,8 @@ static void gst_videomixer_pad_get_property (GObject * object, guint prop_id,
static void gst_videomixer_pad_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_videomixer_sort_pads (GstVideoMixer * mix);
#define DEFAULT_PAD_ZORDER 0
#define DEFAULT_PAD_XPOS 0
#define DEFAULT_PAD_YPOS 0
@ -86,7 +103,7 @@ struct _GstVideoMixerPadClass
GstRealPadClass parent_class;
};
GType
static GType
gst_videomixer_pad_get_type (void)
{
static GType videomixer_pad_type = 0;
@ -187,14 +204,17 @@ gst_videomixer_pad_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstVideoMixerPad *pad;
GstVideoMixer *mix;
g_return_if_fail (GST_IS_PAD (object));
pad = GST_VIDEO_MIXER_PAD (object);
mix = GST_VIDEO_MIXER (gst_pad_get_parent (GST_PAD (pad)));
switch (prop_id) {
case ARG_PAD_ZORDER:
pad->zorder = g_value_get_uint (value);
gst_videomixer_sort_pads (mix);
break;
case ARG_PAD_XPOS:
pad->xpos = g_value_get_int (value);
@ -211,21 +231,6 @@ gst_videomixer_pad_set_property (GObject * object, guint prop_id,
}
}
#define GST_TYPE_VIDEO_MIXER (gst_videomixer_get_type())
#define GST_VIDEO_MIXER(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_VIDEO_MIXER, GstVideoMixer))
#define GST_VIDEO_MIXER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_VIDEO_MIXER, GstVideoMixerClass))
#define GST_IS_VIDEO_MIXER(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VIDEO_MIXER))
#define GST_IS_VIDEO_MIXER_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEO_MIXER))
typedef struct _GstVideoMixer GstVideoMixer;
typedef struct _GstVideoMixerClass GstVideoMixerClass;
GType gst_videomixer_get_type (void);
typedef enum
{
VIDEO_MIXER_BACKGROUND_CHECKER,
@ -284,7 +289,10 @@ gst_videomixer_pad_sinkconnect (GstPad * pad, const GstCaps * vscaps)
mix->in_width = MAX (mix->in_width, mixpad->in_width);
mix->in_height = MAX (mix->in_height, mixpad->in_height);
mix->in_framerate = mixpad->in_framerate;
if (mix->in_framerate < mixpad->in_framerate) {
mix->in_framerate = mixpad->in_framerate;
mix->master = mixpad;
}
return GST_PAD_LINK_OK;
}
@ -407,7 +415,7 @@ static GstElementClass *parent_class = NULL;
/*static guint gst_videomixer_signals[LAST_SIGNAL] = { 0 }; */
GType
static GType
gst_videomixer_get_type (void)
{
static GType videomixer_type = 0;
@ -526,9 +534,6 @@ gst_videomixer_request_new_pad (GstElement * element,
mixpad->zorder = mix->numpads;
mix->numpads++;
if (mix->numpads == 1) {
mix->master = mixpad;
}
mix->sinkpads = g_slist_append (mix->sinkpads, newpad);
} else {
g_warning ("videomixer: this is not our template!\n");
@ -578,8 +583,8 @@ gst_videomixer_handle_src_event (GstPad * pad, GstEvent * event)
V = ((V*mult) + (127*(32-mult)))>>5; \
Y = 255; \
} \
U = MIN (U,255) \
V = MIN (V,255)
U = MIN (U,255); \
V = MIN (V,255);
#define BLEND_SUBTRACT(Y1,U1,V1,Y2,U2,V2,alpha,Y,U,V) \
Y = Y1-((Y2*alpha)>>8); \
@ -699,10 +704,11 @@ gst_videomixer_handle_src_event (GstPad * pad, GstEvent * event)
#define BLEND_MODE BLEND_NORMAL
#if 0
#define BLEND_MODE BLEND_NORMAL
#define BLEND_MODE BLEND_ADD
#define BLEND_MODE BLEND_SUBTRACT
#define BLEND_MODE BLEND_DARKEN
#define BLEND_MODE BLEND_LIGHTEN
#define BLEND_MODE BLEND_DARKEN
#define BLEND_MODE BLEND_MULTIPLY
#define BLEND_MODE BLEND_DIFFERENCE
#define BLEND_MODE BLEND_EXCLUSION
@ -814,6 +820,20 @@ gst_videomixer_blend_ayuv_i420 (guint8 * src, gint xpos, gint ypos,
#undef BLEND_MODE
static int
pad_zorder_compare (const GstVideoMixerPad * pad1,
const GstVideoMixerPad * pad2)
{
return pad1->zorder - pad2->zorder;
}
static void
gst_videomixer_sort_pads (GstVideoMixer * mix)
{
mix->sinkpads = g_slist_sort (mix->sinkpads,
(GCompareFunc) pad_zorder_compare);
}
/* fill a buffer with a checkerboard pattern */
static void
gst_videomixer_fill_checker (guint8 * dest, gint width, gint height)
@ -895,8 +915,13 @@ gst_videomixer_fill_queues (GstVideoMixer * mix)
buffer = GST_BUFFER (data);
duration = GST_BUFFER_DURATION (buffer);
/* no duration on the buffer, use the framerate */
if (duration == -1)
duration = GST_SECOND / pad->in_framerate;
if (duration == -1) {
if (pad->in_framerate == 0.0) {
duration = G_MAXINT64;
} else {
duration = GST_SECOND / pad->in_framerate;
}
}
pad->queued += duration;
/* this buffer will need to be mixed */
if (pad->queued > 0) {
@ -951,7 +976,11 @@ gst_videomixer_update_queues (GstVideoMixer * mix)
interval = mix->master->queued;
if (interval <= 0) {
interval = GST_SECOND / mix->in_framerate;
if (mix->in_framerate == 0.0) {
interval = G_MAXINT64;
} else {
interval = GST_SECOND / mix->in_framerate;
}
}
walk = mix->sinkpads;
@ -1008,7 +1037,7 @@ gst_videomixer_loop (GstElement * element)
GST_STR_FOURCC ("I420"), "width", G_TYPE_INT, new_width, "height",
G_TYPE_INT, new_height, NULL);
if (!gst_pad_try_set_caps (mix->srcpad, newcaps)) {
if (GST_PAD_LINK_FAILED (gst_pad_try_set_caps (mix->srcpad, newcaps))) {
GST_ELEMENT_ERROR (mix, CORE, NEGOTIATION, (NULL), (NULL));
return;
}