mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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dvbsuboverlay: use video overlay composition helper
... rather than custom home-made blending. Conflicts: gst/dvbsuboverlay/gstdvbsuboverlay.c
This commit is contained in:
Mark Nauwelaerts
parent
76aedf5641
commit
2d0866ec28
2 changed files with 125 additions and 239 deletions
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@ -175,6 +175,10 @@ gst_dvbsub_overlay_flush_subtitles (GstDVBSubOverlay * render)
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dvb_subtitles_free (render->current_subtitle);
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render->current_subtitle = NULL;
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if (render->current_comp)
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gst_video_overlay_composition_unref (render->current_comp);
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render->current_comp = NULL;
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if (render->dvb_sub)
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dvb_sub_free (render->dvb_sub);
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@ -256,6 +260,10 @@ gst_dvbsub_overlay_finalize (GObject * object)
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dvb_subtitles_free (overlay->current_subtitle);
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overlay->current_subtitle = NULL;
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if (overlay->current_comp)
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gst_video_overlay_composition_unref (overlay->current_comp);
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overlay->current_comp = NULL;
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if (overlay->dvb_sub)
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dvb_sub_free (overlay->dvb_sub);
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@ -448,243 +456,6 @@ gst_dvbsub_overlay_getcaps (GstPad * pad, GstCaps * filter)
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return caps;
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}
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static void
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blit_i420 (GstDVBSubOverlay * overlay, DVBSubtitles * subs,
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GstVideoFrame * frame)
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{
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guint counter;
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DVBSubtitleRect *sub_region;
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gint a1, a2, a3, a4;
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gint y1, y2, y3, y4;
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gint u1, u2, u3, u4;
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gint v1, v2, v3, v4;
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guint32 color;
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const guint8 *src;
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guint8 *dst_y, *dst_y2, *dst_u, *dst_v;
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gint x, y;
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gint w2;
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gint width;
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gint height;
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gint src_stride;
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guint8 *y_data, *u_data, *v_data;
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gint y_stride, u_stride, v_stride;
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gint scale = 0;
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gint scale_x = 0, scale_y = 0; /* 16.16 fixed point */
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width = GST_VIDEO_FRAME_WIDTH (frame);
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height = GST_VIDEO_FRAME_HEIGHT (frame);
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y_data = GST_VIDEO_FRAME_COMP_DATA (frame, 0);
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u_data = GST_VIDEO_FRAME_COMP_DATA (frame, 1);
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v_data = GST_VIDEO_FRAME_COMP_DATA (frame, 2);
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y_stride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 0);
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u_stride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 1);
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v_stride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 2);
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if (width != subs->display_def.display_width &&
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height != subs->display_def.display_height) {
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scale = 1;
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if (subs->display_def.window_flag) {
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scale_x = (width << 16) / subs->display_def.window_width;
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scale_y = (height << 16) / subs->display_def.window_height;
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} else {
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scale_x = (width << 16) / subs->display_def.display_width;
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scale_y = (height << 16) / subs->display_def.display_height;
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}
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}
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for (counter = 0; counter < subs->num_rects; counter++) {
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gint dw, dh, dx, dy;
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gint32 sx = 0, sy; /* 16.16 fixed point */
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gint32 xstep, ystep; /* 16.16 fixed point */
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sub_region = &subs->rects[counter];
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if (sub_region->y > height || sub_region->x > width)
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continue;
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/* blend subtitles onto the video frame */
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dx = sub_region->x;
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dy = sub_region->y;
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dw = sub_region->w;
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dh = sub_region->h;
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if (scale) {
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dx = (dx * scale_x) >> 16;
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dy = (dy * scale_y) >> 16;
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dw = (dw * scale_x) >> 16;
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dh = (dh * scale_y) >> 16;
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/* apply subtitle window offsets after scaling */
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if (subs->display_def.window_flag) {
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dx += subs->display_def.window_x;
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dy += subs->display_def.window_y;
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}
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}
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dw = MIN (dw, width - dx);
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dh = MIN (dh, height - dx);
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xstep = (sub_region->w << 16) / dw;
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ystep = (sub_region->h << 16) / dh;
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w2 = (dw + 1) / 2;
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src_stride = sub_region->pict.rowstride;
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src = sub_region->pict.data;
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dst_y = y_data + dy * y_stride + dx;
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dst_y2 = y_data + (dy + 1) * y_stride + dx;
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dst_u = u_data + ((dy + 1) / 2) * u_stride + (dx + 1) / 2;
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dst_v = v_data + ((dy + 1) / 2) * v_stride + (dx + 1) / 2;
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sy = 0;
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for (y = 0; y < dh - 1; y += 2) {
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sx = 0;
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for (x = 0; x < dw - 1; x += 2) {
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color =
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sub_region->pict.palette[src[(sy >> 16) * src_stride + (sx >> 16)]];
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a1 = (color >> 24) & 0xff;
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y1 = (color >> 16) & 0xff;
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u1 = ((color >> 8) & 0xff) * a1;
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v1 = (color & 0xff) * a1;
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color =
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sub_region->pict.palette[src[(sy >> 16) * src_stride + ((sx +
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xstep) >> 16)]];
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a2 = (color >> 24) & 0xff;
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y2 = (color >> 16) & 0xff;
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u2 = ((color >> 8) & 0xff) * a2;
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v2 = (color & 0xff) * a2;
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color =
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sub_region->pict.palette[src[((sy + ystep) >> 16) * src_stride +
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(sx >> 16)]];
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a3 = (color >> 24) & 0xff;
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y3 = (color >> 16) & 0xff;
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u3 = ((color >> 8) & 0xff) * a3;
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v3 = (color & 0xff) * a3;
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color =
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sub_region->pict.palette[src[((sy + ystep) >> 16) * src_stride +
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((sx + xstep) >> 16)]];
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a4 = (color >> 24) & 0xff;
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y4 = (color >> 16) & 0xff;
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u4 = ((color >> 8) & 0xff) * a4;
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v4 = (color & 0xff) * a4;
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dst_y[0] = (a1 * y1 + (255 - a1) * dst_y[0]) / 255;
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dst_y[1] = (a2 * y2 + (255 - a2) * dst_y[1]) / 255;
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dst_y2[0] = (a3 * y3 + (255 - a3) * dst_y2[0]) / 255;
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dst_y2[1] = (a4 * y4 + (255 - a4) * dst_y2[1]) / 255;
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a1 = (a1 + a2 + a3 + a4) / 4;
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dst_u[0] = ((u1 + u2 + u3 + u4) / 4 + (255 - a1) * dst_u[0]) / 255;
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dst_v[0] = ((v1 + v2 + v3 + v4) / 4 + (255 - a1) * dst_v[0]) / 255;
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dst_y += 2;
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dst_y2 += 2;
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dst_u += 1;
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dst_v += 1;
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sx += 2 * xstep;
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}
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/* Odd width */
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if (x < dw) {
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color =
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sub_region->pict.palette[src[(sy >> 16) * src_stride + (sx >> 16)]];
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a1 = (color >> 24) & 0xff;
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y1 = (color >> 16) & 0xff;
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u1 = ((color >> 8) & 0xff) * a1;
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v1 = (color & 0xff) * a1;
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color =
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sub_region->pict.palette[src[((sy + ystep) >> 16) * src_stride +
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(sx >> 16)]];
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a3 = (color >> 24) & 0xff;
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y3 = (color >> 16) & 0xff;
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u3 = ((color >> 8) & 0xff) * a3;
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v3 = (color & 0xff) * a3;
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dst_y[0] = (a1 * y1 + (255 - a1) * dst_y[0]) / 255;
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dst_y2[0] = (a3 * y3 + (255 - a3) * dst_y2[0]) / 255;
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a1 = (a1 + a3) / 2;
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dst_u[0] = ((u1 + u3) / 2 + (255 - a1) * dst_u[0]) / 255;
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dst_v[0] = ((v1 + v3) / 2 + (255 - a1) * dst_v[0]) / 255;
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dst_y += 1;
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dst_y2 += 1;
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dst_u += 1;
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dst_v += 1;
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sx += xstep;
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}
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sy += 2 * ystep;
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dst_y += y_stride + (y_stride - dw);
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dst_y2 += y_stride + (y_stride - dw);
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dst_u += u_stride - w2;
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dst_v += v_stride - w2;
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}
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/* Odd height */
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if (y < dh) {
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sx = 0;
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for (x = 0; x < dw - 1; x += 2) {
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color =
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sub_region->pict.palette[src[(sy >> 16) * src_stride + (sx >> 16)]];
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a1 = (color >> 24) & 0xff;
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y1 = (color >> 16) & 0xff;
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u1 = ((color >> 8) & 0xff) * a1;
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v1 = (color & 0xff) * a1;
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color =
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sub_region->pict.palette[src[(sy >> 16) * src_stride + ((sx +
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xstep) >> 16)]];
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a2 = (color >> 24) & 0xff;
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y2 = (color >> 16) & 0xff;
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u2 = ((color >> 8) & 0xff) * a2;
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v2 = (color & 0xff) * a2;
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dst_y[0] = (a1 * y1 + (255 - a1) * dst_y[0]) / 255;
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dst_y[1] = (a2 * y2 + (255 - a2) * dst_y[1]) / 255;
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a1 = (a1 + a2) / 2;
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dst_u[0] = ((u1 + u2) / 2 + (255 - a1) * dst_u[0]) / 255;
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dst_v[0] = ((v1 + v2) / 2 + (255 - a1) * dst_v[0]) / 255;
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dst_y += 2;
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dst_u += 1;
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dst_v += 1;
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sx += 2 * xstep;
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}
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/* Odd height and width */
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if (x < dw) {
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color =
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sub_region->pict.palette[src[(sy >> 16) * src_stride + (sx >> 16)]];
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a1 = (color >> 24) & 0xff;
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y1 = (color >> 16) & 0xff;
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u1 = ((color >> 8) & 0xff) * a1;
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v1 = (color & 0xff) * a1;
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dst_y[0] = (a1 * y1 + (255 - a1) * dst_y[0]) / 255;
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dst_u[0] = (u1 + (255 - a1) * dst_u[0]) / 255;
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dst_v[0] = (v1 + (255 - a1) * dst_v[0]) / 255;
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dst_y += 1;
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dst_u += 1;
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dst_v += 1;
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sx += xstep;
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}
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}
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}
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GST_LOG_OBJECT (overlay, "amount of rendered DVBSubtitleRect: %u", counter);
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}
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static gboolean
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gst_dvbsub_overlay_setcaps_video (GstPad * pad, GstCaps * caps)
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{
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@ -851,6 +622,114 @@ gst_dvbsub_overlay_chain_text (GstPad * pad, GstObject * parent,
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return GST_FLOW_OK;
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}
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static GstVideoOverlayComposition *
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gst_dvbsub_overlay_subs_to_comp (GstDVBSubOverlay * overlay,
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DVBSubtitles * subs)
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{
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GstVideoOverlayComposition *comp = NULL;
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GstVideoOverlayRectangle *rect;
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gint width, height, dw, dh, wx, wy;
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gint i;
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g_return_val_if_fail (subs != NULL && subs->num_rects > 0, NULL);
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width = GST_VIDEO_INFO_WIDTH (&overlay->info);
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height = GST_VIDEO_INFO_HEIGHT (&overlay->info);
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dw = subs->display_def.display_width;
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dh = subs->display_def.display_height;
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GST_LOG_OBJECT (overlay,
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"converting %d rectangles for display %dx%d -> video %dx%d",
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subs->num_rects, dw, dh, width, height);
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if (subs->display_def.window_flag) {
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wx = subs->display_def.window_x;
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wy = subs->display_def.window_y;
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GST_LOG_OBJECT (overlay, "display window %dx%d @ (%d, %d)",
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subs->display_def.window_width, subs->display_def.window_height,
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wx, wy);
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} else {
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wx = 0;
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wy = 0;
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}
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for (i = 0; i < subs->num_rects; i++) {
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DVBSubtitleRect *srect = &subs->rects[i];
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GstBuffer *buf;
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gint w, h;
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guint8 *in_data;
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guint32 *palette, *data;
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gint rx, ry, rw, rh, stride;
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gint k, l;
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GstMapInfo map;
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GST_LOG_OBJECT (overlay, "rectangle %d: %dx%d @ (%d, %d)", i,
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srect->w, srect->h, srect->x, srect->y);
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w = srect->w;
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h = srect->h;
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buf = gst_buffer_new_and_alloc (w * h * 4);
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gst_buffer_map (buf, &map, GST_MAP_WRITE);
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data = (guint32 *) map.data;
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in_data = srect->pict.data;
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palette = srect->pict.palette;
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stride = srect->pict.rowstride;
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for (k = 0; k < h; k++) {
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for (l = 0; l < w; l++) {
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guint32 ayuv;
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gint a, y, u, v, r, g, b;
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/* convert ayuv to argb */
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ayuv = palette[*in_data];
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a = ayuv >> 24;
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y = (ayuv >> 16) & 0xff;
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u = (ayuv >> 8) & 0xff;
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v = (ayuv & 0xff);
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r = (298 * y + 459 * v - 63514) >> 8;
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g = (298 * y - 55 * u - 136 * v + 19681) >> 8;
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b = (298 * y + 541 * u - 73988) >> 8;
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r = CLAMP (r, 0, 255);
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g = CLAMP (g, 0, 255);
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b = CLAMP (b, 0, 255);
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*data = ((a << 24) | (r << 16) | (g << 8) | b);
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in_data++;
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data++;
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}
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in_data += stride - w;
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}
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gst_buffer_unmap (buf, &map);
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/* this is assuming the subtitle rectangle coordinates are relative
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* to the window (if there is one) within a display of specified dimension.
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* Coordinate wrt the latter is then scaled to the actual dimension of
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* the video we are dealing with here. */
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rx = gst_util_uint64_scale (wx + srect->x, width, dw);
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ry = gst_util_uint64_scale (wy + srect->y, height, dh);
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rw = gst_util_uint64_scale (srect->w, width, dw);
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rh = gst_util_uint64_scale (srect->h, height, dh);
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GST_LOG_OBJECT (overlay, "rectangle %d rendered: %dx%d @ (%d, %d)", i,
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rw, rh, rx, ry);
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rect = gst_video_overlay_rectangle_new_argb (buf, w, h, 4 * w,
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rx, ry, rw, rh, 0);
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g_assert (rect);
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if (comp) {
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gst_video_overlay_composition_add_rectangle (comp, rect);
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} else {
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comp = gst_video_overlay_composition_new (rect);
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}
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}
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return comp;
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}
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static GstFlowReturn
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gst_dvbsub_overlay_chain_video (GstPad * pad, GstObject * parent,
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GstBuffer * buffer)
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@ -955,7 +834,10 @@ gst_dvbsub_overlay_chain_video (GstPad * pad, GstObject * parent,
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candidate->num_rects);
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dvb_subtitles_free (overlay->current_subtitle);
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overlay->current_subtitle = candidate;
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/* FIXME: Pre-convert current_subtitle to a quick-blend format, num_rects=0 means that there are no regions, e.g, a subtitle "clear" happened */
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if (overlay->current_comp)
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gst_video_overlay_composition_unref (overlay->current_comp);
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overlay->current_comp =
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gst_dvbsub_overlay_subs_to_comp (overlay, overlay->current_subtitle);
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}
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}
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@ -978,7 +860,9 @@ gst_dvbsub_overlay_chain_video (GstPad * pad, GstObject * parent,
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buffer = gst_buffer_make_writable (buffer);
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gst_video_frame_map (&frame, &overlay->info, buffer, GST_MAP_WRITE);
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blit_i420 (overlay, overlay->current_subtitle, &frame);
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g_assert (overlay->current_comp);
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buffer = gst_buffer_make_writable (buffer);
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gst_video_overlay_composition_blend (overlay->current_comp, &frame);
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gst_video_frame_unmap (&frame);
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}
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g_mutex_unlock (&overlay->dvbsub_mutex);
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@ -22,6 +22,7 @@
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#include <gst/gst.h>
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#include <gst/video/video.h>
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#include <gst/video/video-overlay-composition.h>
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#include "dvb-sub.h"
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@ -54,6 +55,7 @@ struct _GstDVBSubOverlay
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GstVideoInfo info;
|
||||
|
||||
DVBSubtitles *current_subtitle; /* The currently active set of subtitle regions, if any */
|
||||
GstVideoOverlayComposition *current_comp;
|
||||
GQueue *pending_subtitles; /* A queue of raw subtitle region sets with
|
||||
* metadata that are waiting their running time */
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue