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textoverlay: add NV12 support

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Fixes bug #627768.
This commit is contained in:
Rob Clark 2010-08-23 13:59:38 -05:00 committed by Sebastian Dröge
parent ac59769604
commit 1b6918709c
1 changed files with 43 additions and 8 deletions
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51
ext/pango/gsttextoverlay.c
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@ -187,7 +187,7 @@ static GstStaticPadTemplate src_template_factory =
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_BGRx ";"
GST_VIDEO_CAPS_xRGB ";"
GST_VIDEO_CAPS_YUV ("I420") ";" GST_VIDEO_CAPS_YUV ("UYVY"))
GST_VIDEO_CAPS_YUV ("{I420, UYUV, NV12}"))
);
static GstStaticPadTemplate video_sink_template_factory =
@ -196,7 +196,7 @@ static GstStaticPadTemplate video_sink_template_factory =
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_BGRx ";"
GST_VIDEO_CAPS_xRGB ";"
GST_VIDEO_CAPS_YUV ("I420") ";" GST_VIDEO_CAPS_YUV ("UYVY"))
GST_VIDEO_CAPS_YUV ("{I420, UYUV, NV12}"))
);
static GstStaticPadTemplate text_sink_template_factory =
@ -1120,7 +1120,7 @@ gst_text_overlay_blit_1 (GstTextOverlay * overlay, guchar * dest, gint xpos,
static inline void
gst_text_overlay_blit_sub2x2cbcr (GstTextOverlay * overlay,
guchar * destcb, guchar * destcr, gint xpos, gint ypos, guchar * text_image,
guint destcb_stride, guint destcr_stride)
guint destcb_stride, guint destcr_stride, guint pix_stride)
{
gint i, j;
gint x, cb, cr;
@ -1131,6 +1131,8 @@ gst_text_overlay_blit_sub2x2cbcr (GstTextOverlay * overlay,
gint width = overlay->image_width - 2;
gint height = overlay->image_height - 2;
xpos *= pix_stride;
if (xpos < 0) {
xpos = 0;
}
@ -1199,17 +1201,20 @@ gst_text_overlay_blit_sub2x2cbcr (GstTextOverlay * overlay,
a /= 4;
if (a == 0) {
pcb++;
pcr++;
pcb += pix_stride;
pcr += pix_stride;
continue;
}
COMP_U (cb, r, g, b);
COMP_V (cr, r, g, b);
x = *pcb;
BLEND (*pcb++, a, cb, x);
BLEND (*pcb, a, cb, x);
x = *pcr;
BLEND (*pcr++, a, cr, x);
BLEND (*pcr, a, cr, x);
pcb += pix_stride;
pcr += pix_stride;
}
}
}
@ -1439,6 +1444,30 @@ gst_text_overlay_shade_xRGB (GstTextOverlay * overlay, guchar * dest,
* text with a huge font size)
*/
static inline void
gst_text_overlay_blit_NV12 (GstTextOverlay * overlay,
guint8 * yuv_pixels, gint xpos, gint ypos)
{
int y_stride, uv_stride;
int u_offset, v_offset;
int h, w;
w = overlay->width;
h = overlay->height;
y_stride = gst_video_format_get_row_stride (GST_VIDEO_FORMAT_NV12, 0, w);
uv_stride = gst_video_format_get_row_stride (GST_VIDEO_FORMAT_NV12, 1, w);
u_offset =
gst_video_format_get_component_offset (GST_VIDEO_FORMAT_NV12, 1, w, h);
v_offset = u_offset + 1;
gst_text_overlay_blit_1 (overlay, yuv_pixels, xpos, ypos, overlay->text_image,
y_stride);
gst_text_overlay_blit_sub2x2cbcr (overlay, yuv_pixels + u_offset,
yuv_pixels + v_offset, xpos, ypos, overlay->text_image, uv_stride,
uv_stride, 2);
}
static inline void
gst_text_overlay_blit_I420 (GstTextOverlay * overlay,
guint8 * yuv_pixels, gint xpos, gint ypos)
@ -1462,7 +1491,7 @@ gst_text_overlay_blit_I420 (GstTextOverlay * overlay,
y_stride);
gst_text_overlay_blit_sub2x2cbcr (overlay, yuv_pixels + u_offset,
yuv_pixels + v_offset, xpos, ypos, overlay->text_image, u_stride,
v_stride);
v_stride, 1);
}
static inline void
@ -1693,6 +1722,8 @@ gst_text_overlay_push_frame (GstTextOverlay * overlay, GstBuffer * video_frame)
if (overlay->want_shading) {
switch (overlay->format) {
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_NV12:
/* NV12 is similar enough for same function to cope */
gst_text_overlay_shade_I420_y (overlay,
GST_BUFFER_DATA (video_frame), xpos, xpos + overlay->image_width,
ypos, ypos + overlay->image_height);
@ -1726,6 +1757,10 @@ gst_text_overlay_push_frame (GstTextOverlay * overlay, GstBuffer * video_frame)
gst_text_overlay_blit_I420 (overlay,
GST_BUFFER_DATA (video_frame), xpos, ypos);
break;
case GST_VIDEO_FORMAT_NV12:
gst_text_overlay_blit_NV12 (overlay,
GST_BUFFER_DATA (video_frame), xpos, ypos);
break;
case GST_VIDEO_FORMAT_UYVY:
gst_text_overlay_blit_UYVY (overlay,
GST_BUFFER_DATA (video_frame), xpos, ypos);