+void video_format_CopyCrop( video_format_t *p_dst, const video_format_t *p_src )
+{
+ p_dst->i_x_offset = p_src->i_x_offset;
+ p_dst->i_y_offset = p_src->i_y_offset;
+ p_dst->i_visible_width = p_src->i_visible_width;
+ p_dst->i_visible_height = p_src->i_visible_height;
+}
+
+void video_format_ScaleCropAr( video_format_t *p_dst, const video_format_t *p_src )
+{
+ p_dst->i_x_offset = (uint64_t)p_src->i_x_offset * p_dst->i_width / p_src->i_width;
+ p_dst->i_y_offset = (uint64_t)p_src->i_y_offset * p_dst->i_height / p_src->i_height;
+ p_dst->i_visible_width = (uint64_t)p_src->i_visible_width * p_dst->i_width / p_src->i_width;
+ p_dst->i_visible_height = (uint64_t)p_src->i_visible_height * p_dst->i_height / p_src->i_height;
+
+ p_dst->i_sar_num *= p_src->i_width;
+ p_dst->i_sar_den *= p_dst->i_width;
+ vlc_ureduce(&p_dst->i_sar_num, &p_dst->i_sar_den,
+ p_dst->i_sar_num, p_dst->i_sar_den, 65536);
+
+ p_dst->i_sar_num *= p_dst->i_height;
+ p_dst->i_sar_den *= p_src->i_height;
+ vlc_ureduce(&p_dst->i_sar_num, &p_dst->i_sar_den,
+ p_dst->i_sar_num, p_dst->i_sar_den, 65536);
+}
+
+//Simplify transforms to have something more managable. Order: angle, hflip.
+static void transform_GetBasicOps( video_transform_t transform,
+ unsigned *restrict angle,
+ bool *restrict hflip )
+{
+ *hflip = ORIENT_IS_MIRROR(transform);
+
+ switch ( transform )
+ {
+ case TRANSFORM_R90:
+ case TRANSFORM_TRANSPOSE:
+ *angle = 90;
+ break;
+ case TRANSFORM_R180:
+ case TRANSFORM_VFLIP:
+ *angle = 180;
+ break;
+ case TRANSFORM_R270:
+ case TRANSFORM_ANTI_TRANSPOSE:
+ *angle = 270;
+ break;
+ case TRANSFORM_HFLIP:
+ case TRANSFORM_IDENTITY:
+ *angle = 0;
+ break;
+ }
+}
+
+static video_transform_t transform_FromBasicOps( unsigned angle, bool hflip )
+{
+ switch ( angle )
+ {
+ case 90:
+ return hflip ? TRANSFORM_TRANSPOSE : TRANSFORM_R90;
+ case 180:
+ return hflip ? TRANSFORM_VFLIP : TRANSFORM_R180;
+ case 270:
+ return hflip ? TRANSFORM_ANTI_TRANSPOSE : TRANSFORM_R270;
+ default:
+ return hflip ? TRANSFORM_HFLIP : TRANSFORM_IDENTITY;
+ }
+}
+
+video_transform_t video_format_GetTransform( video_orientation_t src,
+ video_orientation_t dst )
+{
+ unsigned angle1, angle2;
+ bool hflip1, hflip2;
+
+ transform_GetBasicOps( (video_transform_t)src, &angle1, &hflip1 );
+ transform_GetBasicOps( transform_Inverse( (video_transform_t)dst ),
+ &angle2, &hflip2 );
+
+ int angle = (angle1 + angle2) % 360;
+ bool hflip = hflip1 ^ hflip2;
+
+ return transform_FromBasicOps(angle, hflip);
+}
+
+void video_format_TransformBy( video_format_t *fmt, video_transform_t transform )
+{
+ /* Get destination orientation */
+ unsigned angle1, angle2;
+ bool hflip1, hflip2;
+
+ transform_GetBasicOps( transform, &angle1, &hflip1 );
+ transform_GetBasicOps( (video_transform_t)fmt->orientation, &angle2, &hflip2 );
+
+ unsigned angle = (angle2 - angle1 + 360) % 360;
+ bool hflip = hflip2 ^ hflip1;
+
+ video_orientation_t dst_orient = ORIENT_NORMAL;
+
+ if( hflip ) {
+
+ if( angle == 0 )
+ dst_orient = ORIENT_HFLIPPED;
+ else if( angle == 90 )
+ dst_orient = ORIENT_ANTI_TRANSPOSED;
+ else if( angle == 180 )
+ dst_orient = ORIENT_VFLIPPED;
+ else if( angle == 270 )
+ dst_orient = ORIENT_TRANSPOSED;
+ }
+ else {
+
+ if( angle == 90 )
+ dst_orient = ORIENT_ROTATED_90;
+ else if( angle == 180 )
+ dst_orient = ORIENT_ROTATED_180;
+ else if( angle == 270 )
+ dst_orient = ORIENT_ROTATED_270;
+ }
+
+ /* Apply transform */
+ if( ORIENT_IS_SWAP( fmt->orientation ) != ORIENT_IS_SWAP( dst_orient ) )
+ {
+ video_format_t scratch = *fmt;
+
+ fmt->i_width = scratch.i_height;
+ fmt->i_visible_width = scratch.i_visible_height;
+ fmt->i_height = scratch.i_width;
+ fmt->i_visible_height = scratch.i_visible_width;
+ fmt->i_x_offset = scratch.i_y_offset;
+ fmt->i_y_offset = scratch.i_x_offset;
+ fmt->i_sar_num = scratch.i_sar_den;
+ fmt->i_sar_den = scratch.i_sar_num;
+ }
+
+ fmt->orientation = dst_orient;
+}
+
+void video_format_TransformTo( video_format_t *restrict fmt,
+ video_orientation_t dst_orientation )
+{
+ video_transform_t transform = video_format_GetTransform(fmt->orientation,
+ dst_orientation);
+ video_format_TransformBy(fmt, transform);
+}
+
+void video_format_ApplyRotation( video_format_t *restrict out,
+ const video_format_t *restrict in )
+{
+ *out = *in;
+
+ video_format_TransformTo(out, ORIENT_NORMAL);
+}
+
+bool video_format_IsSimilar( const video_format_t *p_fmt1, const video_format_t *p_fmt2 )
+{
+ video_format_t v1 = *p_fmt1;
+ video_format_t v2 = *p_fmt2;
+
+ if( v1.i_chroma != v2.i_chroma )
+ return false;
+
+ if( v1.i_width != v2.i_width || v1.i_height != v2.i_height ||
+ v1.i_visible_width != v2.i_visible_width ||
+ v1.i_visible_height != v2.i_visible_height ||
+ v1.i_x_offset != v2.i_x_offset || v1.i_y_offset != v2.i_y_offset )
+ return false;
+ if( v1.i_sar_num * v2.i_sar_den != v2.i_sar_num * v1.i_sar_den )
+ return false;
+
+ if( v1.orientation != v2.orientation)
+ return false;
+
+ if( v1.i_chroma == VLC_CODEC_RGB15 ||
+ v1.i_chroma == VLC_CODEC_RGB16 ||
+ v1.i_chroma == VLC_CODEC_RGB24 ||
+ v1.i_chroma == VLC_CODEC_RGB32 )
+ {
+ video_format_FixRgb( &v1 );
+ video_format_FixRgb( &v2 );
+
+ if( v1.i_rmask != v2.i_rmask ||
+ v1.i_gmask != v2.i_gmask ||
+ v1.i_bmask != v2.i_bmask )
+ return false;
+ }
+ return true;
+}
+void video_format_Print( vlc_object_t *p_this,
+ const char *psz_text, const video_format_t *fmt )
+{
+ msg_Dbg( p_this,
+ "%s sz %ix%i, of (%i,%i), vsz %ix%i, 4cc %4.4s, sar %i:%i, msk r0x%x g0x%x b0x%x",
+ psz_text,
+ fmt->i_width, fmt->i_height, fmt->i_x_offset, fmt->i_y_offset,
+ fmt->i_visible_width, fmt->i_visible_height,
+ (char*)&fmt->i_chroma,
+ fmt->i_sar_num, fmt->i_sar_den,
+ fmt->i_rmask, fmt->i_gmask, fmt->i_bmask );
+}
+