textoverlay: Make use of the new video blending utility

This commit is contained in:
Thibault Saunier 2011-11-16 17:54:43 -03:00 committed by Tim-Philipp Müller
parent 00d6ffd9f5
commit a018c187a0
2 changed files with 137 additions and 629 deletions

View file

@ -133,36 +133,6 @@ GST_DEBUG_CATEGORY (pango_debug);
#define MINIMUM_OUTLINE_OFFSET 1.0
#define DEFAULT_SCALE_BASIS 640
#define COMP_Y(ret, r, g, b) \
{ \
ret = (int) (((19595 * r) >> 16) + ((38470 * g) >> 16) + ((7471 * b) >> 16)); \
ret = CLAMP (ret, 0, 255); \
}
#define COMP_U(ret, r, g, b) \
{ \
ret = (int) (-((11059 * r) >> 16) - ((21709 * g) >> 16) + ((32768 * b) >> 16) + 128); \
ret = CLAMP (ret, 0, 255); \
}
#define COMP_V(ret, r, g, b) \
{ \
ret = (int) (((32768 * r) >> 16) - ((27439 * g) >> 16) - ((5329 * b) >> 16) + 128); \
ret = CLAMP (ret, 0, 255); \
}
#define BLEND(ret, alpha, v0, v1) \
{ \
ret = (v0 * alpha + v1 * (255 - alpha)) / 255; \
}
#define OVER(ret, alphaA, Ca, alphaB, Cb, alphaNew) \
{ \
gint _tmp; \
_tmp = (Ca * alphaA + Cb * alphaB * (255 - alphaA) / 255) / alphaNew; \
ret = CLAMP (_tmp, 0, 255); \
}
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
# define CAIRO_ARGB_A 3
# define CAIRO_ARGB_R 2
@ -596,6 +566,11 @@ gst_text_overlay_finalize (GObject * object)
g_free (overlay->default_text);
if (overlay->composition) {
gst_video_overlay_composition_unref (overlay->composition);
overlay->composition = NULL;
}
if (overlay->text_image) {
g_free (overlay->text_image);
overlay->text_image = NULL;
@ -702,7 +677,7 @@ gst_text_overlay_init (GstTextOverlay * overlay, GstTextOverlayClass * klass)
overlay->default_text = g_strdup (DEFAULT_PROP_TEXT);
overlay->need_render = TRUE;
overlay->text_image = NULL;
overlay->composition = NULL;
overlay->use_vertical_render = DEFAULT_PROP_VERTICAL_RENDER;
gst_text_overlay_update_render_mode (overlay);
@ -1178,154 +1153,98 @@ gst_text_overlay_adjust_values_with_fontdesc (GstTextOverlay * overlay,
g = (a > 0) ? MIN ((g * 255 + a / 2) / a, 255) : 0; \
r = (a > 0) ? MIN ((r * 255 + a / 2) / a, 255) : 0; \
} G_STMT_END
static inline void
gst_text_overlay_blit_1 (GstTextOverlay * overlay, guchar * dest, gint xpos,
gint ypos, guchar * text_image, guint dest_stride)
static void
gst_text_overlay_get_pos (GstTextOverlay * overlay, gint * xpos, gint * ypos)
{
gint i, j = 0;
gint x, y;
guchar r, g, b, a;
guchar *pimage;
guchar *py;
gint width = overlay->image_width;
gint height = overlay->image_height;
gint width, height;
GstTextOverlayVAlign valign;
GstTextOverlayHAlign halign;
if (xpos < 0) {
xpos = 0;
width = overlay->image_width;
height = overlay->image_height;
if (overlay->use_vertical_render)
halign = GST_TEXT_OVERLAY_HALIGN_RIGHT;
else
halign = overlay->halign;
switch (halign) {
case GST_TEXT_OVERLAY_HALIGN_LEFT:
*xpos = overlay->xpad;
break;
case GST_TEXT_OVERLAY_HALIGN_CENTER:
*xpos = (overlay->width - width) / 2;
break;
case GST_TEXT_OVERLAY_HALIGN_RIGHT:
*xpos = overlay->width - width - overlay->xpad;
break;
case GST_TEXT_OVERLAY_HALIGN_POS:
*xpos = (gint) (overlay->width * overlay->xpos) - width / 2;
*xpos = CLAMP (*xpos, 0, overlay->width - width);
if (*xpos < 0)
*xpos = 0;
break;
default:
*xpos = 0;
}
*xpos += overlay->deltax;
if (xpos + width > overlay->width) {
width = overlay->width - xpos;
}
if (ypos + height > overlay->height) {
height = overlay->height - ypos;
}
dest += (ypos / 1) * dest_stride;
for (i = 0; i < height; i++) {
pimage = text_image + 4 * (i * overlay->image_width);
py = dest + i * dest_stride + xpos;
for (j = 0; j < width; j++) {
b = pimage[CAIRO_ARGB_B];
g = pimage[CAIRO_ARGB_G];
r = pimage[CAIRO_ARGB_R];
a = pimage[CAIRO_ARGB_A];
CAIRO_UNPREMULTIPLY (a, r, g, b);
pimage += 4;
if (a == 0) {
py++;
continue;
}
COMP_Y (y, r, g, b);
x = *py;
BLEND (*py++, a, y, x);
}
if (overlay->use_vertical_render)
valign = GST_TEXT_OVERLAY_VALIGN_TOP;
else
valign = overlay->valign;
switch (valign) {
case GST_TEXT_OVERLAY_VALIGN_BOTTOM:
*ypos = overlay->height - height - overlay->ypad;
break;
case GST_TEXT_OVERLAY_VALIGN_BASELINE:
*ypos = overlay->height - (height + overlay->ypad);
break;
case GST_TEXT_OVERLAY_VALIGN_TOP:
*ypos = overlay->ypad;
break;
case GST_TEXT_OVERLAY_VALIGN_POS:
*ypos = (gint) (overlay->height * overlay->ypos) - height / 2;
*ypos = CLAMP (*ypos, 0, overlay->height - height);
break;
case GST_TEXT_OVERLAY_VALIGN_CENTER:
*ypos = (overlay->height - height) / 2;
break;
default:
*ypos = overlay->ypad;
break;
}
*ypos += overlay->deltay;
}
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 pix_stride)
gst_text_overlay_set_composition (GstTextOverlay * overlay)
{
gint i, j;
gint x, cb, cr;
gushort r, g, b, a;
gushort r1, g1, b1, a1;
guchar *pimage1, *pimage2;
guchar *pcb, *pcr;
gint width = overlay->image_width - 2;
gint height = overlay->image_height - 2;
gint xpos, ypos;
GstVideoOverlayRectangle *rectangle;
xpos *= pix_stride;
gst_text_overlay_get_pos (overlay, &xpos, &ypos);
if (xpos < 0) {
xpos = 0;
}
if (overlay->text_image) {
GstBuffer *buffer = gst_buffer_new ();
if (xpos + width > overlay->width) {
width = overlay->width - xpos;
}
GST_BUFFER_DATA (buffer) = overlay->text_image;
GST_BUFFER_SIZE (buffer) = gst_video_format_get_size (GST_VIDEO_FORMAT_ARGB,
overlay->image_width, overlay->image_height);
if (ypos + height > overlay->height) {
height = overlay->height - ypos;
}
rectangle = gst_video_overlay_rectangle_new_argb (buffer,
overlay->image_width, overlay->image_height, 4 * overlay->image_width,
1, 1, xpos, ypos, overlay->image_width, overlay->image_height);
destcb += (ypos / 2) * destcb_stride;
destcr += (ypos / 2) * destcr_stride;
if (overlay->composition)
gst_video_overlay_composition_unref (overlay->composition);
overlay->composition = gst_video_overlay_composition_new (rectangle);
gst_video_overlay_rectangle_unref (rectangle);
for (i = 0; i < height; i += 2) {
pimage1 = text_image + 4 * (i * overlay->image_width);
pimage2 = pimage1 + 4 * overlay->image_width;
pcb = destcb + (i / 2) * destcb_stride + xpos / 2;
pcr = destcr + (i / 2) * destcr_stride + xpos / 2;
for (j = 0; j < width; j += 2) {
b = pimage1[CAIRO_ARGB_B];
g = pimage1[CAIRO_ARGB_G];
r = pimage1[CAIRO_ARGB_R];
a = pimage1[CAIRO_ARGB_A];
CAIRO_UNPREMULTIPLY (a, r, g, b);
pimage1 += 4;
b1 = pimage1[CAIRO_ARGB_B];
g1 = pimage1[CAIRO_ARGB_G];
r1 = pimage1[CAIRO_ARGB_R];
a1 = pimage1[CAIRO_ARGB_A];
CAIRO_UNPREMULTIPLY (a1, r1, g1, b1);
b += b1;
g += g1;
r += r1;
a += a1;
pimage1 += 4;
b1 = pimage2[CAIRO_ARGB_B];
g1 = pimage2[CAIRO_ARGB_G];
r1 = pimage2[CAIRO_ARGB_R];
a1 = pimage2[CAIRO_ARGB_A];
CAIRO_UNPREMULTIPLY (a1, r1, g1, b1);
b += b1;
g += g1;
r += r1;
a += a1;
pimage2 += 4;
/* + 2 for rounding */
b1 = pimage2[CAIRO_ARGB_B];
g1 = pimage2[CAIRO_ARGB_G];
r1 = pimage2[CAIRO_ARGB_R];
a1 = pimage2[CAIRO_ARGB_A];
CAIRO_UNPREMULTIPLY (a1, r1, g1, b1);
b += b1 + 2;
g += g1 + 2;
r += r1 + 2;
a += a1 + 2;
pimage2 += 4;
b /= 4;
g /= 4;
r /= 4;
a /= 4;
if (a == 0) {
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);
x = *pcr;
BLEND (*pcr, a, cr, x);
pcb += pix_stride;
pcr += pix_stride;
}
} else if (overlay->composition) {
gst_video_overlay_composition_unref (overlay->composition);
overlay->composition = NULL;
}
}
@ -1477,6 +1396,8 @@ gst_text_overlay_render_pangocairo (GstTextOverlay * overlay,
overlay->baseline_y = ink_rect.y;
g_mutex_unlock (GST_TEXT_OVERLAY_GET_CLASS (overlay)->pango_lock);
gst_text_overlay_set_composition (overlay);
}
#define BOX_XPAD 6
@ -1607,307 +1528,6 @@ ARGB_SHADE_FUNCTION (RGBA, 0);
ARGB_SHADE_FUNCTION (BGRA, 0);
/* FIXME:
* - use proper strides and offset for I420
* - don't draw over the edge of the picture (try a longer
* text with a huge font size)
*/
static inline void
gst_text_overlay_blit_NV12_NV21 (GstTextOverlay * overlay,
guint8 * yuv_pixels, gint xpos, gint ypos)
{
int y_stride, uv_stride;
int u_offset, v_offset;
int h, w;
/* because U/V is 2x2 subsampled, we need to round, either up or down,
* to a boundary of integer number of U/V pixels:
*/
xpos = GST_ROUND_UP_2 (xpos);
ypos = GST_ROUND_UP_2 (ypos);
w = overlay->width;
h = overlay->height;
y_stride = gst_video_format_get_row_stride (overlay->format, 0, w);
uv_stride = gst_video_format_get_row_stride (overlay->format, 1, w);
u_offset = gst_video_format_get_component_offset (overlay->format, 1, w, h);
v_offset = gst_video_format_get_component_offset (overlay->format, 2, w, h);
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_YV12 (GstTextOverlay * overlay,
guint8 * yuv_pixels, gint xpos, gint ypos)
{
int y_stride, u_stride, v_stride;
int u_offset, v_offset;
int h, w;
/* because U/V is 2x2 subsampled, we need to round, either up or down,
* to a boundary of integer number of U/V pixels:
*/
xpos = GST_ROUND_UP_2 (xpos);
ypos = GST_ROUND_UP_2 (ypos);
w = overlay->width;
h = overlay->height;
y_stride = gst_video_format_get_row_stride (overlay->format, 0, w);
u_stride = gst_video_format_get_row_stride (overlay->format, 1, w);
v_stride = gst_video_format_get_row_stride (overlay->format, 2, w);
u_offset = gst_video_format_get_component_offset (overlay->format, 1, w, h);
v_offset = gst_video_format_get_component_offset (overlay->format, 2, w, h);
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, u_stride,
v_stride, 1);
}
static inline void
gst_text_overlay_blit_UYVY (GstTextOverlay * overlay,
guint8 * yuv_pixels, gint xpos, gint ypos)
{
int a0, r0, g0, b0;
int a1, r1, g1, b1;
int y0, y1, u, v;
int i, j;
int h, w;
guchar *pimage, *dest;
/* because U/V is 2x horizontally subsampled, we need to round to a
* boundary of integer number of U/V pixels in x dimension:
*/
xpos = GST_ROUND_UP_2 (xpos);
w = overlay->image_width - 2;
h = overlay->image_height - 2;
if (xpos < 0) {
xpos = 0;
}
if (xpos + w > overlay->width) {
w = overlay->width - xpos;
}
if (ypos + h > overlay->height) {
h = overlay->height - ypos;
}
for (i = 0; i < h; i++) {
pimage = overlay->text_image + i * overlay->image_width * 4;
dest = yuv_pixels + (i + ypos) * overlay->width * 2 + xpos * 2;
for (j = 0; j < w; j += 2) {
b0 = pimage[CAIRO_ARGB_B];
g0 = pimage[CAIRO_ARGB_G];
r0 = pimage[CAIRO_ARGB_R];
a0 = pimage[CAIRO_ARGB_A];
CAIRO_UNPREMULTIPLY (a0, r0, g0, b0);
pimage += 4;
b1 = pimage[CAIRO_ARGB_B];
g1 = pimage[CAIRO_ARGB_G];
r1 = pimage[CAIRO_ARGB_R];
a1 = pimage[CAIRO_ARGB_A];
CAIRO_UNPREMULTIPLY (a1, r1, g1, b1);
pimage += 4;
a0 += a1 + 2;
a0 /= 2;
if (a0 == 0) {
dest += 4;
continue;
}
COMP_Y (y0, r0, g0, b0);
COMP_Y (y1, r1, g1, b1);
b0 += b1 + 2;
g0 += g1 + 2;
r0 += r1 + 2;
b0 /= 2;
g0 /= 2;
r0 /= 2;
COMP_U (u, r0, g0, b0);
COMP_V (v, r0, g0, b0);
BLEND (*dest, a0, u, *dest);
dest++;
BLEND (*dest, a0, y0, *dest);
dest++;
BLEND (*dest, a0, v, *dest);
dest++;
BLEND (*dest, a0, y1, *dest);
dest++;
}
}
}
static inline void
gst_text_overlay_blit_AYUV (GstTextOverlay * overlay,
guint8 * rgb_pixels, gint xpos, gint ypos)
{
int a, r, g, b, a1;
int y, u, v;
int i, j;
int h, w;
guchar *pimage, *dest;
w = overlay->image_width;
h = overlay->image_height;
if (xpos < 0) {
xpos = 0;
}
if (xpos + w > overlay->width) {
w = overlay->width - xpos;
}
if (ypos + h > overlay->height) {
h = overlay->height - ypos;
}
for (i = 0; i < h; i++) {
pimage = overlay->text_image + i * overlay->image_width * 4;
dest = rgb_pixels + (i + ypos) * 4 * overlay->width + xpos * 4;
for (j = 0; j < w; j++) {
a = pimage[CAIRO_ARGB_A];
b = pimage[CAIRO_ARGB_B];
g = pimage[CAIRO_ARGB_G];
r = pimage[CAIRO_ARGB_R];
CAIRO_UNPREMULTIPLY (a, r, g, b);
// convert background to yuv
COMP_Y (y, r, g, b);
COMP_U (u, r, g, b);
COMP_V (v, r, g, b);
// preform text "OVER" background alpha compositing
a1 = a + (dest[0] * (255 - a)) / 255 + 1; // add 1 to prevent divide by 0
OVER (dest[1], a, y, dest[0], dest[1], a1);
OVER (dest[2], a, u, dest[0], dest[2], a1);
OVER (dest[3], a, v, dest[0], dest[3], a1);
dest[0] = a1 - 1; // remove the temporary 1 we added
pimage += 4;
dest += 4;
}
}
}
#define xRGB_BLIT_FUNCTION(name, R, G, B) \
static inline void \
gst_text_overlay_blit_##name (GstTextOverlay * overlay, \
guint8 * rgb_pixels, gint xpos, gint ypos) \
{ \
int a, r, g, b; \
int i, j; \
int h, w; \
guchar *pimage, *dest; \
\
w = overlay->image_width; \
h = overlay->image_height; \
\
if (xpos < 0) { \
xpos = 0; \
} \
\
if (xpos + w > overlay->width) { \
w = overlay->width - xpos; \
} \
\
if (ypos + h > overlay->height) { \
h = overlay->height - ypos; \
} \
\
for (i = 0; i < h; i++) { \
pimage = overlay->text_image + i * overlay->image_width * 4; \
dest = rgb_pixels + (i + ypos) * 4 * overlay->width + xpos * 4; \
for (j = 0; j < w; j++) { \
a = pimage[CAIRO_ARGB_A]; \
b = pimage[CAIRO_ARGB_B]; \
g = pimage[CAIRO_ARGB_G]; \
r = pimage[CAIRO_ARGB_R]; \
CAIRO_UNPREMULTIPLY (a, r, g, b); \
b = (b*a + dest[B] * (255-a)) / 255; \
g = (g*a + dest[G] * (255-a)) / 255; \
r = (r*a + dest[R] * (255-a)) / 255; \
\
dest[B] = b; \
dest[G] = g; \
dest[R] = r; \
pimage += 4; \
dest += 4; \
} \
} \
}
xRGB_BLIT_FUNCTION (xRGB, 1, 2, 3);
xRGB_BLIT_FUNCTION (BGRx, 2, 1, 0);
xRGB_BLIT_FUNCTION (xBGR, 3, 2, 1);
xRGB_BLIT_FUNCTION (RGBx, 0, 1, 2);
#define ARGB_BLIT_FUNCTION(name, A, R, G, B) \
static inline void \
gst_text_overlay_blit_##name (GstTextOverlay * overlay, \
guint8 * rgb_pixels, gint xpos, gint ypos) \
{ \
int a, r, g, b, a1; \
int i, j; \
int h, w; \
guchar *pimage, *dest; \
\
w = overlay->image_width; \
h = overlay->image_height; \
\
if (xpos < 0) { \
xpos = 0; \
} \
\
if (xpos + w > overlay->width) { \
w = overlay->width - xpos; \
} \
\
if (ypos + h > overlay->height) { \
h = overlay->height - ypos; \
} \
\
for (i = 0; i < h; i++) { \
pimage = overlay->text_image + i * overlay->image_width * 4; \
dest = rgb_pixels + (i + ypos) * 4 * overlay->width + xpos * 4; \
for (j = 0; j < w; j++) { \
a = pimage[CAIRO_ARGB_A]; \
b = pimage[CAIRO_ARGB_B]; \
g = pimage[CAIRO_ARGB_G]; \
r = pimage[CAIRO_ARGB_R]; \
CAIRO_UNPREMULTIPLY (a, r, g, b); \
a1 = a + (dest[A] * (255 - a)) / 255 + 1; \
OVER (dest[R], a, r, dest[0], dest[R], a1); \
OVER (dest[G], a, g, dest[0], dest[G], a1); \
OVER (dest[B], a, b, dest[0], dest[B], a1); \
dest[A] = a1 - 1; \
pimage += 4; \
dest += 4; \
} \
} \
}
ARGB_BLIT_FUNCTION (RGBA, 3, 0, 1, 2);
ARGB_BLIT_FUNCTION (BGRA, 3, 2, 1, 0);
ARGB_BLIT_FUNCTION (ARGB, 0, 1, 2, 3);
ARGB_BLIT_FUNCTION (ABGR, 0, 3, 2, 1);
static void
gst_text_overlay_render_text (GstTextOverlay * overlay,
const gchar * text, gint textlen)
@ -1946,69 +1566,10 @@ static GstFlowReturn
gst_text_overlay_push_frame (GstTextOverlay * overlay, GstBuffer * video_frame)
{
gint xpos, ypos;
gint width, height;
GstTextOverlayVAlign valign;
GstTextOverlayHAlign halign;
width = overlay->image_width;
height = overlay->image_height;
video_frame = gst_buffer_make_writable (video_frame);
if (overlay->use_vertical_render)
halign = GST_TEXT_OVERLAY_HALIGN_RIGHT;
else
halign = overlay->halign;
switch (halign) {
case GST_TEXT_OVERLAY_HALIGN_LEFT:
xpos = overlay->xpad;
break;
case GST_TEXT_OVERLAY_HALIGN_CENTER:
xpos = (overlay->width - width) / 2;
break;
case GST_TEXT_OVERLAY_HALIGN_RIGHT:
xpos = overlay->width - width - overlay->xpad;
break;
case GST_TEXT_OVERLAY_HALIGN_POS:
xpos = (gint) (overlay->width * overlay->xpos) - width / 2;
xpos = CLAMP (xpos, 0, overlay->width - width);
if (xpos < 0)
xpos = 0;
break;
default:
xpos = 0;
}
xpos += overlay->deltax;
if (overlay->use_vertical_render)
valign = GST_TEXT_OVERLAY_VALIGN_TOP;
else
valign = overlay->valign;
switch (valign) {
case GST_TEXT_OVERLAY_VALIGN_BOTTOM:
ypos = overlay->height - height - overlay->ypad;
break;
case GST_TEXT_OVERLAY_VALIGN_BASELINE:
ypos = overlay->height - (height + overlay->ypad);
break;
case GST_TEXT_OVERLAY_VALIGN_TOP:
ypos = overlay->ypad;
break;
case GST_TEXT_OVERLAY_VALIGN_POS:
ypos = (gint) (overlay->height * overlay->ypos) - height / 2;
ypos = CLAMP (ypos, 0, overlay->height - height);
break;
case GST_TEXT_OVERLAY_VALIGN_CENTER:
ypos = (overlay->height - height) / 2;
break;
default:
ypos = overlay->ypad;
break;
}
ypos += overlay->deltay;
gst_text_overlay_get_pos (overlay, &xpos, &ypos);
/* shaded background box */
if (overlay->want_shading) {
switch (overlay->format) {
@ -2071,65 +1632,9 @@ gst_text_overlay_push_frame (GstTextOverlay * overlay, GstBuffer * video_frame)
}
}
if (ypos < 0)
ypos = 0;
if (overlay->composition)
gst_video_overlay_composition_blend (overlay->composition, video_frame);
if (overlay->text_image) {
switch (overlay->format) {
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
gst_text_overlay_blit_I420_YV12 (overlay,
GST_BUFFER_DATA (video_frame), xpos, ypos);
break;
case GST_VIDEO_FORMAT_NV12:
case GST_VIDEO_FORMAT_NV21:
gst_text_overlay_blit_NV12_NV21 (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);
break;
case GST_VIDEO_FORMAT_AYUV:
gst_text_overlay_blit_AYUV (overlay,
GST_BUFFER_DATA (video_frame), xpos, ypos);
break;
case GST_VIDEO_FORMAT_BGRx:
gst_text_overlay_blit_BGRx (overlay,
GST_BUFFER_DATA (video_frame), xpos, ypos);
break;
case GST_VIDEO_FORMAT_xRGB:
gst_text_overlay_blit_xRGB (overlay,
GST_BUFFER_DATA (video_frame), xpos, ypos);
break;
case GST_VIDEO_FORMAT_RGBx:
gst_text_overlay_blit_RGBx (overlay,
GST_BUFFER_DATA (video_frame), xpos, ypos);
break;
case GST_VIDEO_FORMAT_xBGR:
gst_text_overlay_blit_xBGR (overlay,
GST_BUFFER_DATA (video_frame), xpos, ypos);
break;
case GST_VIDEO_FORMAT_ARGB:
gst_text_overlay_blit_ARGB (overlay,
GST_BUFFER_DATA (video_frame), xpos, ypos);
break;
case GST_VIDEO_FORMAT_ABGR:
gst_text_overlay_blit_ABGR (overlay,
GST_BUFFER_DATA (video_frame), xpos, ypos);
break;
case GST_VIDEO_FORMAT_RGBA:
gst_text_overlay_blit_RGBA (overlay,
GST_BUFFER_DATA (video_frame), xpos, ypos);
break;
case GST_VIDEO_FORMAT_BGRA:
gst_text_overlay_blit_BGRA (overlay,
GST_BUFFER_DATA (video_frame), xpos, ypos);
break;
default:
g_assert_not_reached ();
}
}
return gst_pad_push (overlay->srcpad, video_frame);
}

View file

@ -3,6 +3,7 @@
#include <gst/gst.h>
#include <gst/video/video.h>
#include <gst/video/video-overlay-composition.h>
#include <gst/controller/gstcontroller.h>
#include <pango/pangocairo.h>
@ -95,65 +96,67 @@ typedef enum {
* Opaque textoverlay object structure
*/
struct _GstTextOverlay {
GstElement element;
GstElement element;
GstPad *video_sinkpad;
GstPad *text_sinkpad;
GstPad *srcpad;
GstPad *video_sinkpad;
GstPad *text_sinkpad;
GstPad *srcpad;
GstSegment segment;
GstSegment text_segment;
GstBuffer *text_buffer;
gboolean text_linked;
gboolean video_flushing;
gboolean video_eos;
gboolean text_flushing;
gboolean text_eos;
GstSegment segment;
GstSegment text_segment;
GstBuffer *text_buffer;
gboolean text_linked;
gboolean video_flushing;
gboolean video_eos;
gboolean text_flushing;
gboolean text_eos;
GCond *cond; /* to signal removal of a queued text
GCond *cond; /* to signal removal of a queued text
* buffer, arrival of a text buffer,
* a text segment update, or a change
* in status (e.g. shutdown, flushing) */
gint width;
gint height;
gint fps_n;
gint fps_d;
GstVideoFormat format;
gint width;
gint height;
gint fps_n;
gint fps_d;
GstVideoFormat format;
GstTextOverlayVAlign valign;
GstTextOverlayHAlign halign;
GstTextOverlayWrapMode wrap_mode;
GstTextOverlayLineAlign line_align;
GstTextOverlayVAlign valign;
GstTextOverlayHAlign halign;
GstTextOverlayWrapMode wrap_mode;
GstTextOverlayLineAlign line_align;
gint xpad;
gint ypad;
gint deltax;
gint deltay;
gdouble xpos;
gdouble ypos;
gchar *default_text;
gboolean want_shading;
gboolean silent;
gboolean wait_text;
guint color, outline_color;
gint xpad;
gint ypad;
gint deltax;
gint deltay;
gdouble xpos;
gdouble ypos;
gchar *default_text;
gboolean want_shading;
gboolean silent;
gboolean wait_text;
guint color, outline_color;
PangoLayout *layout;
gdouble shadow_offset;
gboolean want_shadow;
gdouble outline_offset;
guchar *text_image;
gint image_width;
gint image_height;
gint baseline_y;
PangoLayout *layout;
gdouble shadow_offset;
gboolean want_shadow;
gdouble outline_offset;
guchar *text_image;
gint image_width;
gint image_height;
gint baseline_y;
gboolean auto_adjust_size;
gboolean need_render;
gboolean auto_adjust_size;
gboolean need_render;
gint shading_value; /* for timeoverlay subclass */
gint shading_value; /* for timeoverlay subclass */
gboolean have_pango_markup;
gboolean use_vertical_render;
gboolean have_pango_markup;
gboolean use_vertical_render;
GstVideoOverlayComposition *composition;
};
struct _GstTextOverlayClass {