1 /*****************************************************************************
2 * adjust.c : Contrast/Hue/Saturation/Brightness video plugin for vlc
3 *****************************************************************************
4 * Copyright (C) 2000, 2001 VideoLAN
5 * $Id: adjust.c,v 1.7 2003/01/09 16:26:14 sam Exp $
7 * Authors: Simon Latapie <garf@via.ecp.fr>, Samuel Hocevar <sam@zoy.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
28 #include <stdlib.h> /* malloc(), free() */
35 #include "filter_common.h"
38 # define M_PI 3.14159265358979323846
41 #define eight_times( x ) x x x x x x x x
43 /*****************************************************************************
45 *****************************************************************************/
46 static int Create ( vlc_object_t * );
47 static void Destroy ( vlc_object_t * );
49 static int Init ( vout_thread_t * );
50 static void End ( vout_thread_t * );
51 static void Render ( vout_thread_t *, picture_t * );
53 /*****************************************************************************
55 *****************************************************************************/
57 #define CONT_TEXT N_("set image contrast")
58 #define CONT_LONGTEXT N_("Set the image contrast. Defaults to 1")
59 #define HUE_TEXT N_("set image hue")
60 #define HUE_LONGTEXT N_("Set the image hue, between 0 and 360. Defaults to 0")
61 #define SAT_TEXT N_("set image saturation")
62 #define SAT_LONGTEXT N_("Set the image saturation. Defaults to 1")
63 #define LUM_TEXT N_("set image brightness")
64 #define LUM_LONGTEXT N_("Set the image brightness. Defaults to 1")
68 add_category_hint( N_("Adjust"), NULL );
69 add_float_with_range( "contrast", 1.0, 0.0, 2.0, NULL, CONT_TEXT, CONT_LONGTEXT );
70 add_float_with_range( "brightness", 1.0, 0.0, 2.0, NULL, LUM_TEXT, LUM_LONGTEXT );
71 add_integer_with_range( "hue", 0, 0, 360, NULL, HUE_TEXT, HUE_LONGTEXT );
72 add_float_with_range( "saturation", 1.0, 0.0, 3.0, NULL, SAT_TEXT, SAT_LONGTEXT );
73 set_description( _("contrast/hue/saturation/brightness filter") );
74 set_capability( "video filter", 0 );
75 add_shortcut( "adjust" );
76 set_callbacks( Create, Destroy );
79 /*****************************************************************************
80 * vout_sys_t: adjust video output method descriptor
81 *****************************************************************************
82 * This structure is part of the video output thread descriptor.
83 * It describes the adjust specific properties of an output thread.
84 *****************************************************************************/
87 vout_thread_t *p_vout;
90 inline static int32_t clip( int32_t a )
92 return (a > 255) ? 255 : (a < 0) ? 0 : a;
95 /*****************************************************************************
96 * Create: allocates adjust video thread output method
97 *****************************************************************************
98 * This function allocates and initializes a adjust vout method.
99 *****************************************************************************/
100 static int Create( vlc_object_t *p_this )
102 vout_thread_t *p_vout = (vout_thread_t *)p_this;
104 /* Allocate structure */
105 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
106 if( p_vout->p_sys == NULL )
108 msg_Err( p_vout, "out of memory" );
112 p_vout->pf_init = Init;
113 p_vout->pf_end = End;
114 p_vout->pf_manage = NULL;
115 p_vout->pf_render = Render;
116 p_vout->pf_display = NULL;
121 /*****************************************************************************
122 * Init: initialize adjust video thread output method
123 *****************************************************************************/
124 static int Init( vout_thread_t *p_vout )
129 I_OUTPUTPICTURES = 0;
131 /* Initialize the output structure */
132 p_vout->output.i_chroma = p_vout->render.i_chroma;
133 p_vout->output.i_width = p_vout->render.i_width;
134 p_vout->output.i_height = p_vout->render.i_height;
135 p_vout->output.i_aspect = p_vout->render.i_aspect;
137 /* Try to open the real video output */
138 msg_Dbg( p_vout, "spawning the real video output" );
140 p_vout->p_sys->p_vout = vout_Create( p_vout,
141 p_vout->render.i_width, p_vout->render.i_height,
142 p_vout->render.i_chroma, p_vout->render.i_aspect );
144 /* Everything failed */
145 if( p_vout->p_sys->p_vout == NULL )
147 msg_Err( p_vout, "can't open vout, aborting" );
152 ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
157 /*****************************************************************************
158 * End: terminate adjust video thread output method
159 *****************************************************************************/
160 static void End( vout_thread_t *p_vout )
164 /* Free the fake output buffers we allocated */
165 for( i_index = I_OUTPUTPICTURES ; i_index ; )
168 free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
172 /*****************************************************************************
173 * Destroy: destroy adjust video thread output method
174 *****************************************************************************
175 * Terminate an output method created by adjustCreateOutputMethod
176 *****************************************************************************/
177 static void Destroy( vlc_object_t *p_this )
179 vout_thread_t *p_vout = (vout_thread_t *)p_this;
181 vout_Destroy( p_vout->p_sys->p_vout );
183 free( p_vout->p_sys );
186 /*****************************************************************************
187 * Render: displays previously rendered output
188 *****************************************************************************
189 * This function send the currently rendered image to adjust modified image,
190 * waits until it is displayed and switch the two rendering buffers, preparing
192 *****************************************************************************/
193 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
198 uint8_t *p_in, *p_in_u, *p_in_v, *p_in_end, *p_line_end;
199 uint8_t *p_out, *p_out_u, *p_out_v;
202 int32_t i_cont, i_lum;
203 int i_sat, i_sin, i_cos, i_x, i_y;
206 /* This is a new frame. Get a structure from the video_output. */
207 while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
210 if( p_vout->b_die || p_vout->b_error )
214 msleep( VOUT_OUTMEM_SLEEP );
217 vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
218 vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
220 /* Get configuration variables */
221 i_cont = config_GetFloat( p_vout, "contrast" ) * 255;
222 i_lum = (config_GetFloat( p_vout, "brightness" ) - 1.0) * 255;
223 f_hue = config_GetInt( p_vout, "hue" ) * M_PI / 180;
224 i_sat = config_GetFloat( p_vout, "saturation" ) * 256;
226 /* Contrast is a fast but kludged function, so I put this gap to be
228 i_lum += 128 - i_cont / 2;
230 /* Fill the luma lookup table */
231 for( i = 0 ; i < 256 ; i++ )
233 pi_luma[ i ] = clip( i_lum + i_cont * i / 256 );
240 p_in = p_pic->p[0].p_pixels;
241 p_in_end = p_in + p_pic->p[0].i_lines * p_pic->p[0].i_pitch - 8;
243 p_out = p_outpic->p[0].p_pixels;
245 for( ; p_in < p_in_end ; )
247 p_line_end = p_in + p_pic->p[0].i_visible_pitch - 8;
249 for( ; p_in < p_line_end ; )
251 /* Do 8 pixels at a time */
252 *p_out++ = pi_luma[ *p_in++ ]; *p_out++ = pi_luma[ *p_in++ ];
253 *p_out++ = pi_luma[ *p_in++ ]; *p_out++ = pi_luma[ *p_in++ ];
254 *p_out++ = pi_luma[ *p_in++ ]; *p_out++ = pi_luma[ *p_in++ ];
255 *p_out++ = pi_luma[ *p_in++ ]; *p_out++ = pi_luma[ *p_in++ ];
260 for( ; p_in < p_line_end ; )
262 *p_out++ = pi_luma[ *p_in++ ];
265 p_in += p_pic->p[0].i_pitch - p_pic->p[0].i_visible_pitch;
269 * Do the U and V planes
272 p_in_u = p_pic->p[1].p_pixels;
273 p_in_v = p_pic->p[2].p_pixels;
274 p_in_end = p_in_u + p_pic->p[1].i_lines * p_pic->p[1].i_pitch - 8;
276 p_out_u = p_outpic->p[1].p_pixels;
277 p_out_v = p_outpic->p[2].p_pixels;
279 i_sin = sin(f_hue) * 256;
280 i_cos = cos(f_hue) * 256;
282 i_x = ( cos(f_hue) + sin(f_hue) ) * 32768;
283 i_y = ( cos(f_hue) - sin(f_hue) ) * 32768;
287 #define WRITE_UV_CLIP() \
288 i_u = *p_in_u++ ; i_v = *p_in_v++ ; \
289 *p_out_u++ = clip( (( ((i_u * i_cos + i_v * i_sin - i_x) >> 8) \
290 * i_sat) >> 8) + 128); \
291 *p_out_v++ = clip( (( ((i_v * i_cos - i_u * i_sin - i_y) >> 8) \
292 * i_sat) >> 8) + 128)
296 for( ; p_in_u < p_in_end ; )
298 p_line_end = p_in_u + p_pic->p[1].i_visible_pitch - 8;
300 for( ; p_in_u < p_line_end ; )
302 /* Do 8 pixels at a time */
303 WRITE_UV_CLIP(); WRITE_UV_CLIP();
304 WRITE_UV_CLIP(); WRITE_UV_CLIP();
305 WRITE_UV_CLIP(); WRITE_UV_CLIP();
306 WRITE_UV_CLIP(); WRITE_UV_CLIP();
311 for( ; p_in_u < p_line_end ; )
316 p_in_u += p_pic->p[1].i_pitch - p_pic->p[1].i_visible_pitch;
317 p_in_v += p_pic->p[2].i_pitch - p_pic->p[2].i_visible_pitch;
318 p_out_u += p_pic->p[1].i_pitch - p_pic->p[1].i_visible_pitch;
319 p_out_v += p_pic->p[2].i_pitch - p_pic->p[2].i_visible_pitch;
325 i_u = *p_in_u++ ; i_v = *p_in_v++ ; \
326 *p_out_u++ = (( ((i_u * i_cos + i_v * i_sin - i_x) >> 8) \
327 * i_sat) >> 8) + 128; \
328 *p_out_v++ = (( ((i_v * i_cos - i_u * i_sin - i_y) >> 8) \
333 for( ; p_in_u < p_in_end ; )
335 p_line_end = p_in + p_pic->p[1].i_visible_pitch - 8;
337 for( ; p_in_u < p_line_end ; )
339 /* Do 8 pixels at a time */
340 WRITE_UV(); WRITE_UV(); WRITE_UV(); WRITE_UV();
341 WRITE_UV(); WRITE_UV(); WRITE_UV(); WRITE_UV();
346 for( ; p_in_u < p_line_end ; )
351 p_in_u += p_pic->p[1].i_pitch - p_pic->p[1].i_visible_pitch;
352 p_in_v += p_pic->p[2].i_pitch - p_pic->p[2].i_visible_pitch;
353 p_out_u += p_pic->p[1].i_pitch - p_pic->p[1].i_visible_pitch;
354 p_out_v += p_pic->p[2].i_pitch - p_pic->p[2].i_visible_pitch;
358 vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
360 vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );