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dvdspu: some optimizations

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Detect invisible pixels, and skip gstspu_vobsub_blend_comp_buffers()
when there are only invisible pixels.  This significantly reduces the
CPU load in cases of DVDs which don't use the clip_rect to exclude
processing for parts of the screen where the video is visible.

https://bugzilla.gnome.org/show_bug.cgi?id=667221
This commit is contained in:
Rob Clark 2015-02-08 01:19:42 +11:00 committed by Jan Schmidt
parent cb7c99b8ee
commit b4df029030
1 changed files with 23 additions and 14 deletions
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37
gst/dvdspu/gstspu-vobsub-render.c
View file

@ -168,7 +168,7 @@ gstspu_vobsub_get_rle_code (SpuState * state, guint16 * rle_offset)
return code;
}
static inline void
static inline gboolean
gstspu_vobsub_draw_rle_run (SpuState * state, gint16 x, gint16 end,
SpuColour * colour)
{
@ -191,7 +191,10 @@ gstspu_vobsub_draw_rle_run (SpuState * state, gint16 x, gint16 end,
}
/* Update the compositing buffer so we know how much to blend later */
*(state->vobsub.comp_last_x_ptr) = end - 1; /* end is the start of the *next* run */
return TRUE;
}
return FALSE;
}
static inline gint16
@ -204,16 +207,17 @@ rle_end_x (guint16 rle_code, gint16 x, gint16 end)
return MIN (end, x + (rle_code >> 2));
}
static void gstspu_vobsub_render_line_with_chgcol (SpuState * state,
static gboolean gstspu_vobsub_render_line_with_chgcol (SpuState * state,
guint8 * planes[3], guint16 * rle_offset);
static gboolean gstspu_vobsub_update_chgcol (SpuState * state);
static void
static gboolean
gstspu_vobsub_render_line (SpuState * state, guint8 * planes[3],
guint16 * rle_offset)
{
gint16 x, next_x, end, rle_code, next_draw_x;
SpuColour *colour;
gboolean visible = FALSE;
/* Check for special case of chg_col info to use (either highlight or
* ChgCol command */
@ -222,8 +226,7 @@ gstspu_vobsub_render_line (SpuState * state, guint8 * planes[3],
/* Check the top & bottom, because we might not be within the region yet */
if (state->vobsub.cur_Y >= state->vobsub.cur_chg_col->top &&
state->vobsub.cur_Y <= state->vobsub.cur_chg_col->bottom) {
gstspu_vobsub_render_line_with_chgcol (state, planes, rle_offset);
return;
return gstspu_vobsub_render_line_with_chgcol (state, planes, rle_offset);
}
}
}
@ -250,9 +253,11 @@ gstspu_vobsub_render_line (SpuState * state, guint8 * planes[3],
/* Now draw the run between [x,next_x) */
if (state->vobsub.cur_Y >= state->vobsub.clip_rect.top &&
state->vobsub.cur_Y <= state->vobsub.clip_rect.bottom)
gstspu_vobsub_draw_rle_run (state, x, next_draw_x, colour);
visible |= gstspu_vobsub_draw_rle_run (state, x, next_draw_x, colour);
x = next_x;
}
return visible;
}
static gboolean
@ -282,7 +287,7 @@ gstspu_vobsub_update_chgcol (SpuState * state)
return FALSE;
}
static void
static gboolean
gstspu_vobsub_render_line_with_chgcol (SpuState * state, guint8 * planes[3],
guint16 * rle_offset)
{
@ -294,6 +299,7 @@ gstspu_vobsub_render_line_with_chgcol (SpuState * state, guint8 * planes[3],
SpuVobsubPixCtrlI *next_pix_ctrl;
SpuVobsubPixCtrlI *end_pix_ctrl;
SpuVobsubPixCtrlI dummy_pix_ctrl;
gboolean visible = FALSE;
gint16 cur_reg_end;
gint i;
@ -342,7 +348,7 @@ gstspu_vobsub_render_line_with_chgcol (SpuState * state, guint8 * planes[3],
if (G_LIKELY (x < run_end)) {
colour = &cur_pix_ctrl->pal_cache[rle_code & 3];
gstspu_vobsub_draw_rle_run (state, x, run_draw_end, colour);
visible |= gstspu_vobsub_draw_rle_run (state, x, run_draw_end, colour);
x = run_end;
}
@ -358,6 +364,8 @@ gstspu_vobsub_render_line_with_chgcol (SpuState * state, guint8 * planes[3],
}
}
}
return visible;
}
static void
@ -544,7 +552,7 @@ gstspu_vobsub_render (GstDVDSpu * dvdspu, GstVideoFrame * frame)
for (state->vobsub.cur_Y = y; state->vobsub.cur_Y <= last_y;
state->vobsub.cur_Y++) {
gboolean clip;
gboolean clip, visible = FALSE;
clip = (state->vobsub.cur_Y < state->vobsub.clip_rect.top
|| state->vobsub.cur_Y > state->vobsub.clip_rect.bottom);
@ -562,9 +570,9 @@ gstspu_vobsub_render (GstDVDSpu * dvdspu, GstVideoFrame * frame)
/* Render odd line */
state->vobsub.comp_last_x_ptr = state->vobsub.comp_last_x + 1;
gstspu_vobsub_render_line (state, planes, &state->vobsub.cur_offsets[1]);
visible |= gstspu_vobsub_render_line (state, planes, &state->vobsub.cur_offsets[1]);
if (!clip) {
if (visible && !clip) {
/* Blend the accumulated UV compositing buffers onto the output */
gstspu_vobsub_blend_comp_buffers (state, planes);
}
@ -576,7 +584,7 @@ gstspu_vobsub_render (GstDVDSpu * dvdspu, GstVideoFrame * frame)
}
if (state->vobsub.cur_Y == state->vobsub.disp_rect.bottom) {
gboolean clip;
gboolean clip, visible = FALSE;
clip = (state->vobsub.cur_Y < state->vobsub.clip_rect.top
|| state->vobsub.cur_Y > state->vobsub.clip_rect.bottom);
@ -588,8 +596,9 @@ gstspu_vobsub_render (GstDVDSpu * dvdspu, GstVideoFrame * frame)
* after the above loop exited. */
gstspu_vobsub_clear_comp_buffers (state);
state->vobsub.comp_last_x_ptr = state->vobsub.comp_last_x;
gstspu_vobsub_render_line (state, planes, &state->vobsub.cur_offsets[0]);
gstspu_vobsub_blend_comp_buffers (state, planes);
visible |= gstspu_vobsub_render_line (state, planes, &state->vobsub.cur_offsets[0]);
if (visible)
gstspu_vobsub_blend_comp_buffers (state, planes);
}
}