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textoverlay: Add support for UYVY colorspace

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Fixes bug #378094.
This commit is contained in:
Zeeshan Ali 2009-03-26 10:36:27 +01:00 committed by Sebastian Dröge
parent 5ec2d48f0a
commit e54e10ad19
2 changed files with 117 additions and 14 deletions
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130
ext/pango/gsttextoverlay.c
View file

@ -2,6 +2,7 @@
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) <2003> David Schleef <ds@schleef.org>
* Copyright (C) <2006> Julien Moutte <julien@moutte.net>
* Copyright (C) <2006> Zeeshan Ali <zeeshan.ali@nokia.com>
* Copyright (C) <2006-2008> Tim-Philipp Müller <tim centricular net>
*
* This library is free software; you can redistribute it and/or
@ -94,7 +95,7 @@ static const GstElementDetails text_overlay_details =
GST_ELEMENT_DETAILS ("Text overlay",
"Filter/Editor/Video",
"Adds text strings on top of a video buffer",
"David Schleef <ds@schleef.org>");
"David Schleef <ds@schleef.org>, " "Zeeshan Ali <zeeshan.ali@nokia.com>");
#define DEFAULT_PROP_TEXT ""
@ -137,19 +138,20 @@ enum
PROP_LAST
};
static GstStaticPadTemplate src_template_factory =
GST_STATIC_PAD_TEMPLATE ("src",
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420") ";"
GST_VIDEO_CAPS_YUV ("UYVY"))
);
static GstStaticPadTemplate video_sink_template_factory =
GST_STATIC_PAD_TEMPLATE ("video_sink",
GST_STATIC_PAD_TEMPLATE ("video_sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420") ";"
GST_VIDEO_CAPS_YUV ("UYVY"))
);
static GstStaticPadTemplate text_sink_template_factory =
@ -159,7 +161,6 @@ static GstStaticPadTemplate text_sink_template_factory =
GST_STATIC_CAPS ("text/x-pango-markup; text/plain")
);
#define GST_TYPE_TEXT_OVERLAY_VALIGN (gst_text_overlay_valign_get_type())
static GType
gst_text_overlay_valign_get_type (void)
@ -581,6 +582,7 @@ gst_text_overlay_setcaps (GstPad * pad, GstCaps * caps)
if (gst_structure_get_int (structure, "width", &overlay->width) &&
gst_structure_get_int (structure, "height", &overlay->height) &&
gst_structure_get_fourcc (structure, "format", &overlay->format) &&
fps != NULL) {
ret = gst_pad_set_caps (overlay->srcpad, caps);
}
@ -856,7 +858,7 @@ gst_text_overlay_getcaps (GstPad * pad)
#define BOX_YPAD 6
static inline void
gst_text_overlay_shade_y (GstTextOverlay * overlay, guchar * dest,
gst_text_overlay_shade_I420_y (GstTextOverlay * overlay, guchar * dest,
gint x0, gint x1, gint y0, gint y1)
{
gint i, j, dest_stride;
@ -879,6 +881,33 @@ gst_text_overlay_shade_y (GstTextOverlay * overlay, guchar * dest,
}
}
static inline void
gst_text_overlay_shade_UYVY_y (GstTextOverlay * overlay, guchar * dest,
gint x0, gint x1, gint y0, gint y1)
{
gint i, j;
guint dest_stride = gst_video_format_get_row_stride (GST_VIDEO_FORMAT_UYVY, 0,
overlay->width);
x0 = CLAMP (x0 - BOX_XPAD, 0, overlay->width);
x1 = CLAMP (x1 + BOX_XPAD, 0, overlay->width);
y0 = CLAMP (y0 - BOX_YPAD, 0, overlay->height);
y1 = CLAMP (y1 + BOX_YPAD, 0, overlay->height);
for (i = y0; i < y1; i++) {
for (j = x0; j < x1; j++) {
gint y;
gint y_pos;
y_pos = (i * dest_stride) + j * 2 + 1;
y = dest[y_pos] + overlay->shading_value;
dest[y_pos] = CLAMP (y, 0, 255);
}
}
}
/* FIXME:
* - use proper strides and offset for I420
* - don't draw over the edge of the picture (try a longer
@ -886,7 +915,7 @@ gst_text_overlay_shade_y (GstTextOverlay * overlay, guchar * dest,
*/
static inline void
gst_text_overlay_blit_yuv420 (GstTextOverlay * overlay, FT_Bitmap * bitmap,
gst_text_overlay_blit_I420 (GstTextOverlay * overlay, FT_Bitmap * bitmap,
guint8 * yuv_pixels, gint x0, gint y0)
{
int y; /* text bitmap coordinates */
@ -982,6 +1011,58 @@ gst_text_overlay_blit_yuv420 (GstTextOverlay * overlay, FT_Bitmap * bitmap,
}
}
static inline void
gst_text_overlay_blit_UYVY (GstTextOverlay * overlay, FT_Bitmap * bitmap,
guint8 * yuv_pixels, gint x0, gint y0)
{
int y; /* text bitmap coordinates */
int x1, y1; /* video buffer coordinates */
int bit_rowinc;
guint8 *p, *bitp;
int video_width, video_height;
int bitmap_x0 = 0; //x0 < 1 ? -(x0 - 1) : 1; /* 1 pixel border */
int bitmap_y0 = y0 < 1 ? -(y0 - 1) : 1; /* 1 pixel border */
int bitmap_width = bitmap->width - bitmap_x0;
int bitmap_height = bitmap->rows - bitmap_y0;
video_width =
gst_video_format_get_row_stride (GST_VIDEO_FORMAT_UYVY, 0,
overlay->width);
video_height = overlay->height;
/*g_debug ("bliting bitmap(%d, %d) on yuv (%d,%d) at %d,%d",
bitmap_width, bitmap_height,
video_width, video_height,
x0, y0); */
if (x0 + bitmap_x0 + bitmap_width > overlay->width - 1) /* 1 pixel border */
bitmap_width -= x0 + bitmap_x0 + bitmap_width - overlay->width + 1;
if (y0 + bitmap_y0 + bitmap_height > video_height - 1) /* 1 pixel border */
bitmap_height -= y0 + bitmap_y0 + bitmap_height - video_height + 1;
bit_rowinc = bitmap->pitch - bitmap_width;
y1 = y0 + bitmap_y0;
x1 = x0 + bitmap_x0;
bitp = bitmap->buffer + bitmap->pitch * bitmap_y0 + bitmap_x0;
for (y = bitmap_y0; y < bitmap_y0 + bitmap_height; y++) {
int n;
/* Go to the Y0 of the first macroblock we wan't to write to */
p = yuv_pixels + (y0 + y) * video_width + (x1 * 2) + 1;
for (n = bitmap_width; n > 0; --n) {
if (*bitp) {
*p = *bitp;
*(p - 1) = 0x80;
}
p += 2;
bitp++;
}
bitp += bit_rowinc;
}
}
static void
gst_text_overlay_resize_bitmap (GstTextOverlay * overlay, gint width,
gint height)
@ -1093,15 +1174,36 @@ gst_text_overlay_push_frame (GstTextOverlay * overlay, GstBuffer * video_frame)
/* shaded background box */
if (overlay->want_shading) {
gst_text_overlay_shade_y (overlay,
GST_BUFFER_DATA (video_frame), xpos, xpos + overlay->bitmap.width,
ypos, ypos + overlay->bitmap.rows);
switch (overlay->format) {
case GST_MAKE_FOURCC ('I', '4', '2', '0'):
gst_text_overlay_shade_I420_y (overlay,
GST_BUFFER_DATA (video_frame), xpos, xpos + overlay->bitmap.width,
ypos, ypos + overlay->bitmap.rows);
break;
case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'):
gst_text_overlay_shade_UYVY_y (overlay,
GST_BUFFER_DATA (video_frame), xpos, xpos + overlay->bitmap.width,
ypos, ypos + overlay->bitmap.rows);
break;
default:
g_assert_not_reached ();
}
}
if (overlay->bitmap.buffer) {
gst_text_overlay_blit_yuv420 (overlay, &overlay->bitmap,
GST_BUFFER_DATA (video_frame), xpos, ypos);
switch (overlay->format) {
case GST_MAKE_FOURCC ('I', '4', '2', '0'):
gst_text_overlay_blit_I420 (overlay, &overlay->bitmap,
GST_BUFFER_DATA (video_frame), xpos, ypos);
break;
case GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'):
gst_text_overlay_blit_UYVY (overlay, &overlay->bitmap,
GST_BUFFER_DATA (video_frame), xpos, ypos);
break;
default:
g_assert_not_reached ();
}
}
return gst_pad_push (overlay->srcpad, video_frame);

1
ext/pango/gsttextoverlay.h
View file

@ -109,6 +109,7 @@ struct _GstTextOverlay {
gint height;
gint fps_n;
gint fps_d;
guint32 format;
GstTextOverlayVAlign valign;
GstTextOverlayHAlign halign;