diff options
Diffstat (limited to 'gst/deinterlace2/tvtime/vfir.c')
| -rw-r--r-- | gst/deinterlace2/tvtime/vfir.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/gst/deinterlace2/tvtime/vfir.c b/gst/deinterlace2/tvtime/vfir.c new file mode 100644 index 00000000..bb42f5d3 --- /dev/null +++ b/gst/deinterlace2/tvtime/vfir.c @@ -0,0 +1,184 @@ +/* + * + * GStreamer + * Copyright (C) 2004 Billy Biggs <vektor@dumbterm.net> + * Copyright (c) 2001, 2002, 2003 Fabrice Bellard. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +/* + * This file contains code from ffmpeg, see http://ffmpeg.org/ (LGPL) + * and modifications by Billy Biggs. + * + * Relicensed for GStreamer from GPL to LGPL with permit from Billy Biggs. + * See: http://bugzilla.gnome.org/show_bug.cgi?id=163578 + */ + +#include <stdio.h> +#if defined (__SVR4) && defined (__sun) +# include <sys/int_types.h> +#else +# include <stdint.h> +#endif + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include "mmx.h" +#include "speedy.h" +#include "gstdeinterlace2.h" + +/** + * The MPEG2 spec uses a slightly harsher filter, they specify + * [-1 8 2 8 -1]. ffmpeg uses a similar filter but with more of + * a tendancy to blur than to use the local information. The + * filter taps here are: [-1 4 2 4 -1]. + */ + +static void +deinterlace_line (uint8_t * dst, uint8_t * lum_m4, + uint8_t * lum_m3, uint8_t * lum_m2, + uint8_t * lum_m1, uint8_t * lum, int size) +{ +#ifdef HAVE_CPU_I386 + mmx_t rounder; + + rounder.uw[0] = 4; + rounder.uw[1] = 4; + rounder.uw[2] = 4; + rounder.uw[3] = 4; + pxor_r2r (mm7, mm7); + movq_m2r (rounder, mm6); + + for (; size > 3; size -= 4) { + movd_m2r (lum_m4[0], mm0); + movd_m2r (lum_m3[0], mm1); + movd_m2r (lum_m2[0], mm2); + movd_m2r (lum_m1[0], mm3); + movd_m2r (lum[0], mm4); + punpcklbw_r2r (mm7, mm0); + punpcklbw_r2r (mm7, mm1); + punpcklbw_r2r (mm7, mm2); + punpcklbw_r2r (mm7, mm3); + punpcklbw_r2r (mm7, mm4); + paddw_r2r (mm3, mm1); + psllw_i2r (1, mm2); + paddw_r2r (mm4, mm0); + psllw_i2r (2, mm1); // 2 + paddw_r2r (mm6, mm2); + paddw_r2r (mm2, mm1); + psubusw_r2r (mm0, mm1); + psrlw_i2r (3, mm1); // 3 + packuswb_r2r (mm7, mm1); + movd_r2m (mm1, dst[0]); + lum_m4 += 4; + lum_m3 += 4; + lum_m2 += 4; + lum_m1 += 4; + lum += 4; + dst += 4; + } + emms (); +#else + /** + * C implementation. + */ + int sum; + + for (; size > 0; size--) { + sum = -lum_m4[0]; + sum += lum_m3[0] << 2; + sum += lum_m2[0] << 1; + sum += lum_m1[0] << 2; + sum += -lum[0]; + dst[0] = (sum + 4) >> 3; // This needs to be clipped at 0 and 255: cm[(sum + 4) >> 3]; + lum_m4++; + lum_m3++; + lum_m2++; + lum_m1++; + lum++; + dst++; + } +#endif +} + + +/** + * The commented-out method below that uses the bottom_field member is more + * like the filter as specified in the MPEG2 spec, but it doesn't seem to + * have the desired effect. + */ + +static void +deinterlace_scanline_vfir (GstDeinterlace2 * object, + deinterlace_scanline_data_t * data, uint8_t * output) +{ + deinterlace_line (output, data->tt1, data->t0, data->m1, data->b0, data->bb1, + object->frame_width * 2); + // blit_packed422_scanline( output, data->m1, width ); +} + +static void +copy_scanline (GstDeinterlace2 * object, + deinterlace_scanline_data_t * data, uint8_t * output) +{ + blit_packed422_scanline (output, data->m0, object->frame_width); + /* + if( data->bottom_field ) { + deinterlace_line( output, data->tt2, data->t1, data->m2, data->b1, data->bb2, width*2 ); + } else { + deinterlace_line( output, data->tt0, data->t1, data->m0, data->b1, data->bb0, width*2 ); + } + */ +} + + +static deinterlace_method_t vfirmethod = { + 0, //DEINTERLACE_PLUGIN_API_VERSION, + "Blur: Vertical", + "BlurVertical", + 2, +#ifdef HAVE_CPU_I386 + OIL_IMPL_FLAG_MMXEXT, +#else + 0, +#endif + 0, + 0, + 0, + 1, + deinterlace_scanline_vfir, + copy_scanline, + 0, + {"Avoids flicker by blurring consecutive frames", + "of input. Use this if you want to run your", + "monitor at an arbitrary refresh rate and not", + "use much CPU, and are willing to sacrifice", + "detail.", + "", + "Vertical mode blurs favouring the most recent", + "field for less visible trails. From the", + "deinterlacer filter in ffmpeg.", + ""} +}; + +deinterlace_method_t * +dscaler_vfir_get_method (void) +{ + return &vfirmethod; +} |