This can be used to calculate (and return) the pixel address and pitch
for split buffer formats, for the CbCr or Cb and Cr components (2-plane
or 3-plane formats).
Signed-off-by: André Draszik <andre.dras...@st.com>
---
src/core/surface.h | 110 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 110 insertions(+)
diff --git a/src/core/surface.h b/src/core/surface.h
index aaa18d0..836ca89 100644
--- a/src/core/surface.h
+++ b/src/core/surface.h
@@ -504,6 +504,116 @@ dfb_surface_data_offset( const CoreSurface *surface,
}
static __inline__ void
+dfb_surface_data_cbcr_offset( const CoreSurface * const surface,
+ const void * const data,
+ int pitch,
+ int x,
+ int y,
+ u8 ** const offset_cb,
+ int * const pitch_cb,
+ u8 ** const offset_cr,
+ int * const pitch_cr )
+{
+ D_ASSERT( surface != NULL );
+ D_ASSERT( data != NULL );
+ D_ASSERT( pitch > 0 );
+ D_ASSERT( x >= 0 );
+ D_ASSERT( x < surface->config.size.w );
+ D_ASSERT( y >= 0 );
+ D_ASSERT( y < surface->config.size.h );
+ D_ASSERT( offset_cb != NULL );
+ D_ASSERT( pitch_cb != NULL );
+ D_ASSERT( offset_cr != NULL );
+ D_ASSERT( pitch_cr != NULL );
+
+ if (surface->config.caps & DSCAPS_SEPARATED) {
+ if (y & 1)
+ y += surface->config.size.h;
+
+ y >>= 1;
+ }
+
+ switch (surface->config.format) {
+ case DSPF_NV12:
+ case DSPF_NV21:
+ *pitch_cb = pitch;
+ *pitch_cr = 0;
+ *offset_cb = ((u8*)data
+ + pitch * surface->config.size.h
+ + *pitch_cb * y/2
+ + DFB_BYTES_PER_LINE( surface->config.format, x/2
));
+ *offset_cr = NULL;
+ break;
+ case DSPF_NV16:
+ *pitch_cb = pitch;
+ *pitch_cr = 0;
+ *offset_cb = ((u8*)data
+ + pitch * surface->config.size.h
+ + *pitch_cb * y
+ + DFB_BYTES_PER_LINE( surface->config.format, x/2
));
+ *offset_cr = NULL;
+ break;
+ case DSPF_I420:
+ *pitch_cb = pitch / 2;
+ *pitch_cr = pitch / 2;
+ *offset_cb = ((u8*)data
+ + pitch * surface->config.size.h
+ + *pitch_cb * y/2
+ + DFB_BYTES_PER_LINE( surface->config.format, x/2
));
+ *offset_cr = ((u8*)data
+ + pitch * surface->config.size.h
+ + *pitch_cb * surface->config.size.h/2
+ + *pitch_cr * y/2
+ + DFB_BYTES_PER_LINE( surface->config.format, x/2
));
+ break;
+ case DSPF_YV12:
+ *pitch_cb = pitch / 2;
+ *pitch_cr = pitch / 2;
+ *offset_cr = ((u8*)data
+ + pitch * surface->config.size.h
+ + *pitch_cr * y/2
+ + DFB_BYTES_PER_LINE( surface->config.format, x/2
));
+ *offset_cb = ((u8*)data
+ + pitch * surface->config.size.h
+ + *pitch_cr * surface->config.size.h/2
+ + *pitch_cb * y/2
+ + DFB_BYTES_PER_LINE( surface->config.format, x/2
));
+ break;
+ case DSPF_YV16:
+ *pitch_cb = pitch / 2;
+ *pitch_cr = pitch / 2;
+ *offset_cr = ((u8*)data
+ + pitch * surface->config.size.h
+ + *pitch_cr * y
+ + DFB_BYTES_PER_LINE( surface->config.format, x/2
));
+ *offset_cb = ((u8*)data
+ + pitch * surface->config.size.h
+ + *pitch_cr * surface->config.size.h
+ + *pitch_cb * y
+ + DFB_BYTES_PER_LINE( surface->config.format, x/2
));
+ break;
+ case DSPF_YUV444P:
+ *pitch_cb = pitch;
+ *pitch_cr = pitch;
+ *offset_cb = ((u8*)data
+ + pitch * surface->config.size.h
+ + *pitch_cb * y
+ + DFB_BYTES_PER_LINE( surface->config.format, x
));
+ *offset_cr = ((u8*)data
+ + pitch * surface->config.size.h
+ + *pitch_cb * surface->config.size.h
+ + *pitch_cr * y
+ + DFB_BYTES_PER_LINE( surface->config.format, x
));
+ break;
+
+ default:
+ *offset_cb = *offset_cr = NULL;
+ *pitch_cb = *pitch_cr = 0;
+ break;
+ }
+}
+
+static __inline__ void
dfb_surface_calc_buffer_size( CoreSurface *surface,
int byte_align,
int pixel_align,
--
1.8.2
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