1 /*****************************************************************************
2 * adjust.c : Contrast/Hue/Saturation/Brightness video plugin for vlc
3 *****************************************************************************
4 * Copyright (C) 2000, 2001, 2002, 2003 VideoLAN
5 * $Id: adjust.c,v 1.9 2003/01/17 16:18:03 sam Exp $
7 * Authors: Simon Latapie <garf@via.ecp.fr>
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 static int SendEvents( vlc_object_t *, char const *,
54 vlc_value_t, vlc_value_t, void * );
56 /*****************************************************************************
58 *****************************************************************************/
60 #define CONT_TEXT N_("set image contrast")
61 #define CONT_LONGTEXT N_("Set the image contrast. Defaults to 1")
62 #define HUE_TEXT N_("set image hue")
63 #define HUE_LONGTEXT N_("Set the image hue, between 0 and 360. Defaults to 0")
64 #define SAT_TEXT N_("set image saturation")
65 #define SAT_LONGTEXT N_("Set the image saturation. Defaults to 1")
66 #define LUM_TEXT N_("set image brightness")
67 #define LUM_LONGTEXT N_("Set the image brightness. Defaults to 1")
71 add_category_hint( N_("Adjust"), NULL );
72 add_float_with_range( "contrast", 1.0, 0.0, 2.0, NULL, CONT_TEXT, CONT_LONGTEXT );
73 add_float_with_range( "brightness", 1.0, 0.0, 2.0, NULL, LUM_TEXT, LUM_LONGTEXT );
74 add_integer_with_range( "hue", 0, 0, 360, NULL, HUE_TEXT, HUE_LONGTEXT );
75 add_float_with_range( "saturation", 1.0, 0.0, 3.0, NULL, SAT_TEXT, SAT_LONGTEXT );
76 set_description( _("contrast/hue/saturation/brightness filter") );
77 set_capability( "video filter", 0 );
78 add_shortcut( "adjust" );
79 set_callbacks( Create, Destroy );
82 /*****************************************************************************
83 * vout_sys_t: adjust video output method descriptor
84 *****************************************************************************
85 * This structure is part of the video output thread descriptor.
86 * It describes the adjust specific properties of an output thread.
87 *****************************************************************************/
90 vout_thread_t *p_vout;
93 inline static int32_t clip( int32_t a )
95 return (a > 255) ? 255 : (a < 0) ? 0 : a;
98 /*****************************************************************************
99 * Create: allocates adjust video thread output method
100 *****************************************************************************
101 * This function allocates and initializes a adjust vout method.
102 *****************************************************************************/
103 static int Create( vlc_object_t *p_this )
105 vout_thread_t *p_vout = (vout_thread_t *)p_this;
107 /* Allocate structure */
108 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
109 if( p_vout->p_sys == NULL )
111 msg_Err( p_vout, "out of memory" );
115 p_vout->pf_init = Init;
116 p_vout->pf_end = End;
117 p_vout->pf_manage = NULL;
118 p_vout->pf_render = Render;
119 p_vout->pf_display = NULL;
124 /*****************************************************************************
125 * Init: initialize adjust video thread output method
126 *****************************************************************************/
127 static int Init( vout_thread_t *p_vout )
132 I_OUTPUTPICTURES = 0;
134 /* Initialize the output structure */
135 p_vout->output.i_chroma = p_vout->render.i_chroma;
136 p_vout->output.i_width = p_vout->render.i_width;
137 p_vout->output.i_height = p_vout->render.i_height;
138 p_vout->output.i_aspect = p_vout->render.i_aspect;
140 /* Try to open the real video output */
141 msg_Dbg( p_vout, "spawning the real video output" );
143 p_vout->p_sys->p_vout = vout_Create( p_vout,
144 p_vout->render.i_width, p_vout->render.i_height,
145 p_vout->render.i_chroma, p_vout->render.i_aspect );
147 /* Everything failed */
148 if( p_vout->p_sys->p_vout == NULL )
150 msg_Err( p_vout, "can't open vout, aborting" );
155 ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
157 ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
162 /*****************************************************************************
163 * End: terminate adjust video thread output method
164 *****************************************************************************/
165 static void End( vout_thread_t *p_vout )
169 /* Free the fake output buffers we allocated */
170 for( i_index = I_OUTPUTPICTURES ; i_index ; )
173 free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
177 /*****************************************************************************
178 * Destroy: destroy adjust video thread output method
179 *****************************************************************************
180 * Terminate an output method created by adjustCreateOutputMethod
181 *****************************************************************************/
182 static void Destroy( vlc_object_t *p_this )
184 vout_thread_t *p_vout = (vout_thread_t *)p_this;
186 DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
187 vout_Destroy( p_vout->p_sys->p_vout );
189 free( p_vout->p_sys );
192 /*****************************************************************************
193 * Render: displays previously rendered output
194 *****************************************************************************
195 * This function send the currently rendered image to adjust modified image,
196 * waits until it is displayed and switch the two rendering buffers, preparing
198 *****************************************************************************/
199 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
204 uint8_t *p_in, *p_in_v, *p_in_end, *p_line_end;
205 uint8_t *p_out, *p_out_v;
208 int32_t i_cont, i_lum;
209 int i_sat, i_sin, i_cos, i_x, i_y;
212 /* This is a new frame. Get a structure from the video_output. */
213 while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
216 if( p_vout->b_die || p_vout->b_error )
220 msleep( VOUT_OUTMEM_SLEEP );
223 vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
224 vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
226 /* Get configuration variables */
227 i_cont = config_GetFloat( p_vout, "contrast" ) * 255;
228 i_lum = (config_GetFloat( p_vout, "brightness" ) - 1.0) * 255;
229 f_hue = config_GetInt( p_vout, "hue" ) * M_PI / 180;
230 i_sat = config_GetFloat( p_vout, "saturation" ) * 256;
232 /* Contrast is a fast but kludged function, so I put this gap to be
234 i_lum += 128 - i_cont / 2;
236 /* Fill the luma lookup table */
237 for( i = 0 ; i < 256 ; i++ )
239 pi_luma[ i ] = clip( i_lum + i_cont * i / 256 );
246 p_in = p_pic->p[0].p_pixels;
247 p_in_end = p_in + p_pic->p[0].i_lines * p_pic->p[0].i_pitch - 8;
249 p_out = p_outpic->p[0].p_pixels;
251 for( ; p_in < p_in_end ; )
253 p_line_end = p_in + p_pic->p[0].i_visible_pitch - 8;
255 for( ; p_in < p_line_end ; )
257 /* Do 8 pixels at a time */
258 *p_out++ = pi_luma[ *p_in++ ]; *p_out++ = pi_luma[ *p_in++ ];
259 *p_out++ = pi_luma[ *p_in++ ]; *p_out++ = pi_luma[ *p_in++ ];
260 *p_out++ = pi_luma[ *p_in++ ]; *p_out++ = pi_luma[ *p_in++ ];
261 *p_out++ = pi_luma[ *p_in++ ]; *p_out++ = pi_luma[ *p_in++ ];
266 for( ; p_in < p_line_end ; )
268 *p_out++ = pi_luma[ *p_in++ ];
271 p_in += p_pic->p[0].i_pitch - p_pic->p[0].i_visible_pitch;
272 p_out += p_outpic->p[0].i_pitch - p_outpic->p[0].i_visible_pitch;
276 * Do the U and V planes
279 p_in = p_pic->p[1].p_pixels;
280 p_in_v = p_pic->p[2].p_pixels;
281 p_in_end = p_in + p_pic->p[1].i_lines * p_pic->p[1].i_pitch - 8;
283 p_out = p_outpic->p[1].p_pixels;
284 p_out_v = p_outpic->p[2].p_pixels;
286 i_sin = sin(f_hue) * 256;
287 i_cos = cos(f_hue) * 256;
289 i_x = ( cos(f_hue) + sin(f_hue) ) * 32768;
290 i_y = ( cos(f_hue) - sin(f_hue) ) * 32768;
294 #define WRITE_UV_CLIP() \
295 i_u = *p_in++ ; i_v = *p_in_v++ ; \
296 *p_out++ = clip( (( ((i_u * i_cos + i_v * i_sin - i_x) >> 8) \
297 * i_sat) >> 8) + 128); \
298 *p_out_v++ = clip( (( ((i_v * i_cos - i_u * i_sin - i_y) >> 8) \
299 * i_sat) >> 8) + 128)
303 for( ; p_in < p_in_end ; )
305 p_line_end = p_in + p_pic->p[1].i_visible_pitch - 8;
307 for( ; p_in < p_line_end ; )
309 /* Do 8 pixels at a time */
310 WRITE_UV_CLIP(); WRITE_UV_CLIP();
311 WRITE_UV_CLIP(); WRITE_UV_CLIP();
312 WRITE_UV_CLIP(); WRITE_UV_CLIP();
313 WRITE_UV_CLIP(); WRITE_UV_CLIP();
318 for( ; p_in < p_line_end ; )
323 p_in += p_pic->p[1].i_pitch - p_pic->p[1].i_visible_pitch;
324 p_in_v += p_pic->p[2].i_pitch - p_pic->p[2].i_visible_pitch;
325 p_out += p_outpic->p[1].i_pitch - p_outpic->p[1].i_visible_pitch;
326 p_out_v += p_outpic->p[2].i_pitch - p_outpic->p[2].i_visible_pitch;
332 i_u = *p_in++ ; i_v = *p_in_v++ ; \
333 *p_out++ = (( ((i_u * i_cos + i_v * i_sin - i_x) >> 8) \
334 * i_sat) >> 8) + 128; \
335 *p_out_v++ = (( ((i_v * i_cos - i_u * i_sin - i_y) >> 8) \
340 for( ; p_in < p_in_end ; )
342 p_line_end = p_in + p_pic->p[1].i_visible_pitch - 8;
344 for( ; p_in < p_line_end ; )
346 /* Do 8 pixels at a time */
347 WRITE_UV(); WRITE_UV(); WRITE_UV(); WRITE_UV();
348 WRITE_UV(); WRITE_UV(); WRITE_UV(); WRITE_UV();
353 for( ; p_in < p_line_end ; )
358 p_in += p_pic->p[1].i_pitch - p_pic->p[1].i_visible_pitch;
359 p_in_v += p_pic->p[2].i_pitch - p_pic->p[2].i_visible_pitch;
360 p_out += p_outpic->p[1].i_pitch - p_outpic->p[1].i_visible_pitch;
361 p_out_v += p_outpic->p[2].i_pitch - p_outpic->p[2].i_visible_pitch;
365 vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
367 vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
370 /*****************************************************************************
371 * SendEvents: forward mouse and keyboard events to the parent p_vout
372 *****************************************************************************/
373 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
374 vlc_value_t oldval, vlc_value_t newval, void *p_data )
376 var_Set( (vlc_object_t *)p_data, psz_var, newval );