videomixer: address unused but set variables

GCC 4.6.x spits warnings about variables that are set but unused. Such
variables have been removed in blend, collectpads2 and videomixer2.

gst/videomixer/blend.c

@@ -221,8 +221,8 @@ blend_##format_name (const guint8 * src, gint xpos, gint ypos, \
   gint xoffset = 0; \
   gint yoffset = 0; \
   gint src_comp_rowstride, dest_comp_rowstride; \
-  gint src_comp_height, dest_comp_height; \
-  gint src_comp_width, dest_comp_width; \
+  gint src_comp_height; \
+  gint src_comp_width; \
   gint comp_ypos, comp_xpos; \
   gint comp_yoffset, comp_xoffset; \
   \
@@ -262,9 +262,7 @@ blend_##format_name (const guint8 * src, gint xpos, gint ypos, \
   src_comp_rowstride = gst_video_format_get_row_stride (format_enum, 0, src_width); \
   dest_comp_rowstride = gst_video_format_get_row_stride (format_enum, 0, dest_width); \
   src_comp_height = gst_video_format_get_component_height (format_enum, 0, b_src_height); \
-  dest_comp_height = gst_video_format_get_component_height (format_enum, 0, dest_height); \
   src_comp_width = gst_video_format_get_component_width (format_enum, 0, b_src_width); \
-  dest_comp_width = gst_video_format_get_component_width (format_enum, 0, dest_width); \
   comp_xpos = (xpos == 0) ? 0 : gst_video_format_get_component_width (format_enum, 0, xpos); \
   comp_ypos = (ypos == 0) ? 0 : gst_video_format_get_component_height (format_enum, 0, ypos); \
   comp_xoffset = (xoffset == 0) ? 0 : gst_video_format_get_component_width (format_enum, 0, xoffset); \
@@ -280,9 +278,7 @@ blend_##format_name (const guint8 * src, gint xpos, gint ypos, \
   src_comp_rowstride = gst_video_format_get_row_stride (format_enum, 1, src_width); \
   dest_comp_rowstride = gst_video_format_get_row_stride (format_enum, 1, dest_width); \
   src_comp_height = gst_video_format_get_component_height (format_enum, 1, b_src_height); \
-  dest_comp_height = gst_video_format_get_component_height (format_enum, 1, dest_height); \
   src_comp_width = gst_video_format_get_component_width (format_enum, 1, b_src_width); \
-  dest_comp_width = gst_video_format_get_component_width (format_enum, 1, dest_width); \
   comp_xpos = (xpos == 0) ? 0 : gst_video_format_get_component_width (format_enum, 1, xpos); \
   comp_ypos = (ypos == 0) ? 0 : gst_video_format_get_component_height (format_enum, 1, ypos); \
   comp_xoffset = (xoffset == 0) ? 0 : gst_video_format_get_component_width (format_enum, 1, xoffset); \
@@ -298,9 +294,7 @@ blend_##format_name (const guint8 * src, gint xpos, gint ypos, \
   src_comp_rowstride = gst_video_format_get_row_stride (format_enum, 2, src_width); \
   dest_comp_rowstride = gst_video_format_get_row_stride (format_enum, 2, dest_width); \
   src_comp_height = gst_video_format_get_component_height (format_enum, 2, b_src_height); \
-  dest_comp_height = gst_video_format_get_component_height (format_enum, 2, dest_height); \
   src_comp_width = gst_video_format_get_component_width (format_enum, 2, b_src_width); \
-  dest_comp_width = gst_video_format_get_component_width (format_enum, 2, dest_width); \
   comp_xpos = (xpos == 0) ? 0 : gst_video_format_get_component_width (format_enum, 2, xpos); \
   comp_ypos = (ypos == 0) ? 0 : gst_video_format_get_component_height (format_enum, 2, ypos); \
   comp_xoffset = (xoffset == 0) ? 0 : gst_video_format_get_component_width (format_enum, 2, xoffset); \

gst/videomixer/gstcollectpads2.c

@@ -1759,7 +1759,6 @@ gst_collect_pads2_chain (GstPad * pad, GstBuffer * buffer)
 {
   GstCollectData2 *data;
   GstCollectPads2 *pads;
-  guint64 size;
   GstFlowReturn ret;
   GstBuffer **buffer_p;
   guint32 cookie;
@@ -1782,8 +1781,6 @@ gst_collect_pads2_chain (GstPad * pad, GstBuffer * buffer)
   prepare_buffer_user_data = pads->prepare_buffer_user_data;
   GST_OBJECT_UNLOCK (pads);
 
-  size = GST_BUFFER_SIZE (buffer);
-
   GST_COLLECT_PADS2_STREAM_LOCK (pads);
   /* if not started, bail out */
   if (G_UNLIKELY (!pads->started))

gst/videomixer/videomixer2.c

@@ -361,13 +361,11 @@ static GstCaps *
 gst_videomixer2_pad_sink_getcaps (GstPad * pad)
 {
   GstVideoMixer2 *mix;
-  GstVideoMixer2Pad *mixpad;
   GstCaps *srccaps;
   GstStructure *s;
   gint i, n;
 
   mix = GST_VIDEO_MIXER2 (gst_pad_get_parent (pad));
-  mixpad = GST_VIDEO_MIXER2_PAD (pad);
 
   srccaps = gst_pad_get_fixed_caps_func (GST_PAD (mix->srcpad));
   srccaps = gst_caps_make_writable (srccaps);
@@ -1584,7 +1582,6 @@ gst_videomixer2_sink_prepare_buffer (GstCollectPads2 * pads,
   GstVideoMixer2Pad *pad = GST_VIDEO_MIXER2_PAD (data->pad);
   GstVideoMixer2Collect *mixcol = pad->mixcol;
   GstClockTime start_time, end_time;
-  gint64 last_stop;
 
   start_time = GST_BUFFER_TIMESTAMP (buf);
   if (start_time == -1) {
@@ -1616,10 +1613,6 @@ gst_videomixer2_sink_prepare_buffer (GstCollectPads2 * pads,
     end_time *= mix->segment.abs_rate;
   }
 
-  last_stop = mix->segment.last_stop;
-  if (mix->segment.last_stop == -1)
-    last_stop = mix->segment.start;
-
   if (mixcol->buffer != NULL && end_time < mixcol->end_time) {
     return GST_COLLECT_PADS2_FLOW_DROP;
   }