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dvdspu: Map the pixel data once per render, not *ahem* twice per byte.

Browse source 
The naive port to 1.0 from years ago was silly, make it better.
This commit is contained in:
Jan Schmidt 2015-06-09 09:07:45 +10:00
parent a46809dc20
commit 6fde1dfa88
2 changed files with 17 additions and 5 deletions
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21
gst/dvdspu/gstspu-vobsub-render.c
View file

@ -138,7 +138,7 @@ gstspu_vobsub_get_nibble (SpuState * state, guint16 * rle_offset)
if (G_UNLIKELY (*rle_offset >= state->vobsub.max_offset))
return 0; /* Overran the buffer */
gst_buffer_extract (state->vobsub.pix_buf, (*rle_offset) / 2, &ret, 1);
ret = state->vobsub.pix_buf_map.data[(*rle_offset) / 2];
/* If the offset is even, we shift the answer down 4 bits, otherwise not */
if (*rle_offset & 0x01)
@ -226,7 +226,8 @@ 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) {
return gstspu_vobsub_render_line_with_chgcol (state, planes, rle_offset);
return gstspu_vobsub_render_line_with_chgcol (state, planes,
rle_offset);
}
}
}
@ -430,6 +431,10 @@ gstspu_vobsub_render (GstDVDSpu * dvdspu, GstVideoFrame * frame)
if (G_UNLIKELY (state->vobsub.pix_buf == NULL))
return;
if (!gst_buffer_map (state->vobsub.pix_buf, &state->vobsub.pix_buf_map,
GST_MAP_READ))
return;
/* Store the start of each plane */
planes[0] = GST_VIDEO_FRAME_COMP_DATA (frame, 0);
planes[1] = GST_VIDEO_FRAME_COMP_DATA (frame, 1);
@ -454,7 +459,7 @@ gstspu_vobsub_render (GstDVDSpu * dvdspu, GstVideoFrame * frame)
/* When reading RLE data, we track the offset in nibbles... */
state->vobsub.cur_offsets[0] = state->vobsub.pix_data[0] * 2;
state->vobsub.cur_offsets[1] = state->vobsub.pix_data[1] * 2;
state->vobsub.max_offset = gst_buffer_get_size (state->vobsub.pix_buf) * 2;
state->vobsub.max_offset = state->vobsub.pix_buf_map.size * 2;
/* Update all the palette caches */
gstspu_vobsub_update_palettes (dvdspu, state);
@ -570,7 +575,9 @@ gstspu_vobsub_render (GstDVDSpu * dvdspu, GstVideoFrame * frame)
/* Render odd line */
state->vobsub.comp_last_x_ptr = state->vobsub.comp_last_x + 1;
visible |= gstspu_vobsub_render_line (state, planes, &state->vobsub.cur_offsets[1]);
visible |=
gstspu_vobsub_render_line (state, planes,
&state->vobsub.cur_offsets[1]);
if (visible && !clip) {
/* Blend the accumulated UV compositing buffers onto the output */
@ -596,7 +603,9 @@ 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;
visible |= gstspu_vobsub_render_line (state, planes, &state->vobsub.cur_offsets[0]);
visible |=
gstspu_vobsub_render_line (state, planes,
&state->vobsub.cur_offsets[0]);
if (visible)
gstspu_vobsub_blend_comp_buffers (state, planes);
}
@ -611,4 +620,6 @@ gstspu_vobsub_render (GstDVDSpu * dvdspu, GstVideoFrame * frame)
&& state->vobsub.hl_rect.top != -1) {
gstspu_vobsub_draw_highlight (state, frame, &state->vobsub.hl_rect);
}
gst_buffer_unmap (state->vobsub.pix_buf, &state->vobsub.pix_buf_map);
}

1
gst/dvdspu/gstspu-vobsub.h
View file

@ -52,6 +52,7 @@ struct SpuVobsubState {
/* Top + Bottom field offsets in the buffer. 0 = not set */
guint16 pix_data[2];
GstBuffer *pix_buf; /* Current SPU packet the pix_data references */
GstMapInfo pix_buf_map; /* Mapped buffer info */
SpuRect disp_rect;
SpuRect clip_rect;