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https://code.videolan.org/videolan/vlc
synced 2024-09-04 09:11:33 +02:00
Fix transform plugin 90-degree rotations on I422.
I422 is a planar chroma with non-square pixels. It requires some pixel play when rotating the image at a 90-degree angle. For other transformations we just fall back to the original function.
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@ -21,7 +21,8 @@
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#define CASE_PLANAR_YUV \
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/* FIXME: do all of these really have square pixels? */
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#define CASE_PLANAR_YUV_SQUARE \
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case VLC_FOURCC('I','4','2','0'): \
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case VLC_FOURCC('I','Y','U','V'): \
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case VLC_FOURCC('J','4','2','0'): \
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@ -29,12 +30,18 @@
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case VLC_FOURCC('I','4','1','1'): \
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case VLC_FOURCC('I','4','1','0'): \
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case VLC_FOURCC('Y','V','U','9'): \
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case VLC_FOURCC('I','4','2','2'): \
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case VLC_FOURCC('J','4','2','2'): \
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case VLC_FOURCC('I','4','4','4'): \
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case VLC_FOURCC('J','4','4','4'): \
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case VLC_FOURCC('Y','U','V','A'):
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#define CASE_PLANAR_YUV_NONSQUARE \
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case VLC_FOURCC('I','4','2','2'): \
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case VLC_FOURCC('J','4','2','2'):
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#define CASE_PLANAR_YUV \
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CASE_PLANAR_YUV_SQUARE \
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CASE_PLANAR_YUV_NONSQUARE \
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#define CASE_PACKED_YUV_422 \
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case VLC_FOURCC('U','Y','V','Y'): \
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case VLC_FOURCC('U','Y','N','V'): \
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@ -52,6 +52,7 @@ static void End ( vout_thread_t * );
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static void Render ( vout_thread_t *, picture_t * );
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static void FilterPlanar( vout_thread_t *, const picture_t *, picture_t * );
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static void FilterI422( vout_thread_t *, const picture_t *, picture_t * );
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static void FilterYUYV( vout_thread_t *, const picture_t *, picture_t * );
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static int SendEvents( vlc_object_t *, char const *,
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@ -145,11 +146,16 @@ static int Create( vlc_object_t *p_this )
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switch( p_vout->fmt_in.i_chroma )
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{
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CASE_PLANAR_YUV
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CASE_PLANAR_YUV_SQUARE
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case VLC_FOURCC('G','R','E','Y'):
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p_vout->p_sys->pf_filter = FilterPlanar;
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break;
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case VLC_FOURCC('I','4','2','2'):
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case VLC_FOURCC('J','4','2','2'):
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p_vout->p_sys->pf_filter = FilterI422;
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break;
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CASE_PACKED_YUV_422
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p_vout->p_sys->pf_filter = FilterYUYV;
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break;
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@ -551,6 +557,156 @@ static void FilterPlanar( vout_thread_t *p_vout,
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}
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}
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static void FilterI422( vout_thread_t *p_vout,
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const picture_t *p_pic, picture_t *p_outpic )
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{
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int i_index;
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switch( p_vout->p_sys->i_mode )
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{
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case TRANSFORM_MODE_180:
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case TRANSFORM_MODE_HFLIP:
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case TRANSFORM_MODE_VFLIP:
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/* Fall back on the default implementation */
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FilterPlanar( p_vout, p_pic, p_outpic );
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return;
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case TRANSFORM_MODE_90:
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for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
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{
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int i_pitch = p_pic->p[i_index].i_pitch;
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uint8_t *p_in = p_pic->p[i_index].p_pixels;
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uint8_t *p_out = p_outpic->p[i_index].p_pixels;
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uint8_t *p_out_end = p_out +
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p_outpic->p[i_index].i_visible_lines *
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p_outpic->p[i_index].i_pitch;
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if( i_index == 0 )
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{
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for( ; p_out < p_out_end ; )
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{
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uint8_t *p_line_end;
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p_out_end -= p_outpic->p[i_index].i_pitch
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- p_outpic->p[i_index].i_visible_pitch;
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p_line_end = p_in + p_pic->p[i_index].i_visible_lines *
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i_pitch;
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for( ; p_in < p_line_end ; )
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{
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p_line_end -= i_pitch;
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*(--p_out_end) = *p_line_end;
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}
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p_in++;
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}
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}
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else /* i_index == 1 or 2 */
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{
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for( ; p_out < p_out_end ; )
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{
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uint8_t *p_line_end, *p_out_end2;
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p_out_end -= p_outpic->p[i_index].i_pitch
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- p_outpic->p[i_index].i_visible_pitch;
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p_out_end2 = p_out_end - p_outpic->p[i_index].i_pitch;
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p_line_end = p_in + p_pic->p[i_index].i_visible_lines *
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i_pitch;
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for( ; p_in < p_line_end ; )
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{
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uint8_t p1, p2;
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p_line_end -= i_pitch;
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p1 = *p_line_end;
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p_line_end -= i_pitch;
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p2 = *p_line_end;
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/* Trick for (x+y)/2 without overflow, based on
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* x + y == (x ^ y) + 2 * (x & y) */
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*(--p_out_end) = (p1 & p2) + ((p1 ^ p2) / 2);
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*(--p_out_end2) = (p1 & p2) + ((p1 ^ p2) / 2);
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}
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p_out_end = p_out_end2;
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p_in++;
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}
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}
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}
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break;
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case TRANSFORM_MODE_270:
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for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
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{
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int i_pitch = p_pic->p[i_index].i_pitch;
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uint8_t *p_in = p_pic->p[i_index].p_pixels;
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uint8_t *p_out = p_outpic->p[i_index].p_pixels;
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uint8_t *p_out_end = p_out +
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p_outpic->p[i_index].i_visible_lines *
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p_outpic->p[i_index].i_pitch;
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if( i_index == 0 )
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{
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for( ; p_out < p_out_end ; )
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{
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uint8_t *p_in_end;
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p_in_end = p_in + p_pic->p[i_index].i_visible_lines *
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i_pitch;
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for( ; p_in < p_in_end ; )
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{
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p_in_end -= i_pitch;
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*p_out++ = *p_in_end;
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}
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p_out += p_outpic->p[i_index].i_pitch
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- p_outpic->p[i_index].i_visible_pitch;
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p_in++;
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}
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}
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else /* i_index == 1 or 2 */
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{
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for( ; p_out < p_out_end ; )
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{
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uint8_t *p_in_end, *p_out2;
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p_in_end = p_in + p_pic->p[i_index].i_visible_lines *
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i_pitch;
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p_out2 = p_out + p_outpic->p[i_index].i_pitch;
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for( ; p_in < p_in_end ; )
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{
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uint8_t p1, p2;
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p_in_end -= i_pitch;
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p1 = *p_in_end;
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p_in_end -= i_pitch;
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p2 = *p_in_end;
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/* Trick for (x+y)/2 without overflow, based on
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* x + y == (x ^ y) + 2 * (x & y) */
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*p_out++ = (p1 & p2) + ((p1 ^ p2) / 2);
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*p_out2++ = (p1 & p2) + ((p1 ^ p2) / 2);
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}
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p_out2 += p_outpic->p[i_index].i_pitch
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- p_outpic->p[i_index].i_visible_pitch;
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p_out = p_out2;
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p_in++;
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}
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}
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}
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break;
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default:
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break;
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}
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}
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static void FilterYUYV( vout_thread_t *p_vout,
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const picture_t *p_pic, picture_t *p_outpic )
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{
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@ -562,6 +718,11 @@ static void FilterYUYV( vout_thread_t *p_vout,
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switch( p_vout->p_sys->i_mode )
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{
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case TRANSFORM_MODE_HFLIP:
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/* Fall back on the default implementation */
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FilterPlanar( p_vout, p_pic, p_outpic );
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return;
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case TRANSFORM_MODE_90:
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for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
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{
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@ -684,25 +845,6 @@ static void FilterYUYV( vout_thread_t *p_vout,
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}
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break;
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case TRANSFORM_MODE_HFLIP:
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for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
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{
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uint8_t *p_in = p_pic->p[i_index].p_pixels;
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uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
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* p_pic->p[i_index].i_pitch;
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uint8_t *p_out = p_outpic->p[i_index].p_pixels;
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for( ; p_in < p_in_end ; )
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{
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p_in_end -= p_pic->p[i_index].i_pitch;
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p_vout->p_libvlc->pf_memcpy( p_out, p_in_end,
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p_pic->p[i_index].i_visible_pitch );
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p_out += p_pic->p[i_index].i_pitch;
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}
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}
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break;
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case TRANSFORM_MODE_VFLIP:
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for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
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{
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