1 /*****************************************************************************
2 * scope.c : Scope effect module
3 *****************************************************************************
4 * Copyright (C) 2002 VideoLAN
5 * $Id: scope.c,v 1.4 2002/03/02 03:51:23 sam Exp $
7 * Authors: 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 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
28 #include <string.h> /* strdup() */
31 #include <videolan/vlc.h>
34 #include "video_output.h"
36 #include "audio_output.h" /* aout_thread_t */
38 #define SCOPE_WIDTH 320
39 #define SCOPE_HEIGHT 240
40 #define SCOPE_ASPECT (VOUT_ASPECT_FACTOR*SCOPE_WIDTH/SCOPE_HEIGHT)
42 /*****************************************************************************
43 * Capabilities defined in the other files.
44 *****************************************************************************/
45 static void aout_getfunctions( function_list_t * p_function_list );
47 /*****************************************************************************
48 * aout_sys_t: scope audio output method descriptor
49 *****************************************************************************
50 * This structure is part of the audio output thread descriptor.
51 * It describes some scope specific variables.
52 *****************************************************************************/
53 typedef struct aout_sys_s
55 struct aout_thread_s aout;
56 struct aout_fifo_s *p_aout_fifo;
58 struct vout_thread_s *p_vout;
62 /*****************************************************************************
63 * Build configuration tree.
64 *****************************************************************************/
69 SET_DESCRIPTION( "scope effect module" )
70 ADD_CAPABILITY( AOUT, 0 )
71 ADD_SHORTCUT( "scope" )
75 aout_getfunctions( &p_module->p_functions->aout );
78 MODULE_DEACTIVATE_START
79 MODULE_DEACTIVATE_STOP
81 /*****************************************************************************
83 *****************************************************************************/
84 static int aout_Open ( aout_thread_t *p_aout );
85 static int aout_SetFormat ( aout_thread_t *p_aout );
86 static int aout_GetBufInfo ( aout_thread_t *p_aout, int i_buffer_info );
87 static void aout_Play ( aout_thread_t *p_aout,
88 byte_t *buffer, int i_size );
89 static void aout_Close ( aout_thread_t *p_aout );
91 /*****************************************************************************
92 * Functions exported as capabilities. They are declared as static so that
93 * we don't pollute the namespace too much.
94 *****************************************************************************/
95 static void aout_getfunctions( function_list_t * p_function_list )
97 p_function_list->functions.aout.pf_open = aout_Open;
98 p_function_list->functions.aout.pf_setformat = aout_SetFormat;
99 p_function_list->functions.aout.pf_getbufinfo = aout_GetBufInfo;
100 p_function_list->functions.aout.pf_play = aout_Play;
101 p_function_list->functions.aout.pf_close = aout_Close;
104 /*****************************************************************************
105 * aout_Open: open a scope effect plugin
106 *****************************************************************************/
107 static int aout_Open( aout_thread_t *p_aout )
109 /* Allocate structure */
110 p_aout->p_sys = malloc( sizeof( aout_sys_t ) );
111 if( p_aout->p_sys == NULL )
113 intf_ErrMsg("error: %s", strerror(ENOMEM) );
117 /* Open video output */
118 p_aout->p_sys->p_vout =
119 vout_CreateThread( NULL, SCOPE_WIDTH, SCOPE_HEIGHT,
120 FOURCC_I420, SCOPE_ASPECT );
122 /* Open audio output */
123 p_aout->p_sys->aout.i_format = p_aout->i_format;
124 p_aout->p_sys->aout.i_rate = p_aout->i_rate;
125 p_aout->p_sys->aout.i_channels = p_aout->i_channels;
127 p_aout->p_sys->aout.p_module = module_Need( MODULE_CAPABILITY_AOUT, "",
128 (void *)&p_aout->p_sys->aout );
129 if( p_aout->p_sys->aout.p_module == NULL )
131 intf_ErrMsg( "aout error: no suitable aout module" );
132 vout_DestroyThread( p_aout->p_sys->p_vout, NULL );
133 free( p_aout->p_sys );
137 #define aout_functions p_aout->p_sys->aout.p_module->p_functions->aout.functions.aout
138 p_aout->p_sys->aout.pf_open = aout_functions.pf_open;
139 p_aout->p_sys->aout.pf_setformat = aout_functions.pf_setformat;
140 p_aout->p_sys->aout.pf_getbufinfo = aout_functions.pf_getbufinfo;
141 p_aout->p_sys->aout.pf_play = aout_functions.pf_play;
142 p_aout->p_sys->aout.pf_close = aout_functions.pf_close;
143 #undef aout_functions
148 /*****************************************************************************
149 * aout_SetFormat: set the output format
150 *****************************************************************************/
151 static int aout_SetFormat( aout_thread_t *p_aout )
155 /* Force the output method */
156 p_aout->p_sys->aout.i_format = p_aout->i_format;
157 p_aout->p_sys->aout.i_channels = p_aout->i_channels;
158 p_aout->p_sys->aout.i_rate = p_aout->i_rate;
161 * Initialize audio device
163 i_ret = p_aout->p_sys->aout.pf_setformat( &p_aout->p_sys->aout );
170 if( p_aout->p_sys->aout.i_format != p_aout->i_format
171 || p_aout->p_sys->aout.i_channels != p_aout->i_channels )
173 intf_ErrMsg( "aout error: plugin isn't cooperative" );
177 p_aout->i_channels = p_aout->p_sys->aout.i_channels;
178 p_aout->i_format = p_aout->p_sys->aout.i_format;
179 p_aout->i_rate = p_aout->p_sys->aout.i_rate;
184 /*****************************************************************************
185 * aout_GetBufInfo: buffer status query
186 *****************************************************************************/
187 static int aout_GetBufInfo( aout_thread_t *p_aout, int i_buffer_limit )
189 return p_aout->p_sys->aout.pf_getbufinfo( &p_aout->p_sys->aout,
193 /*****************************************************************************
194 * aout_Play: play a sound samples buffer
195 *****************************************************************************
196 * This function writes a buffer of i_length bytes in the socket
197 *****************************************************************************/
198 static void aout_Play( aout_thread_t *p_aout, byte_t *p_buffer, int i_size )
201 int i_index, i_image;
205 /* Play the real sound */
206 p_aout->p_sys->aout.pf_play( &p_aout->p_sys->aout, p_buffer, i_size );
208 for( i_image = 0; (i_image + 1) * SCOPE_WIDTH * 8 < i_size ; i_image++ )
210 /* Don't stay here forever */
211 if( mdate() >= p_aout->date - 10000 )
216 /* This is a new frame. Get a structure from the video_output. */
217 while( ( p_outpic = vout_CreatePicture( p_aout->p_sys->p_vout, 0, 0, 0 ) )
224 msleep( VOUT_OUTMEM_SLEEP );
227 /* Blank the picture */
228 for( i_index = 0 ; i_index < p_outpic->i_planes ; i_index++ )
230 memset( p_outpic->p[i_index].p_pixels, i_index ? 0x80 : 0x00,
231 p_outpic->p[i_index].i_lines * p_outpic->p[i_index].i_pitch );
234 /* We only support 2 channels for now */
235 for( i_index = 0 ; i_index < 2 ; i_index++ )
238 for( j = 0 ; j < 3 ; j++ )
240 ppp_area[i_index][j] =
241 p_outpic->p[j].p_pixels + i_index * p_outpic->p[j].i_lines
242 / p_aout->i_channels * p_outpic->p[j].i_pitch;
246 for( i_index = 0, p_sample = (u16*)p_buffer;
247 i_index < SCOPE_WIDTH;
253 for( i = 0 ; i < 2 ; i++ )
256 i_value = *p_sample++ / 256 + 128;
258 + p_outpic->p[0].i_pitch * i_index / SCOPE_WIDTH
259 + p_outpic->p[0].i_lines * i_value / 512
260 * p_outpic->p[0].i_pitch) = 0xbf;
262 + p_outpic->p[1].i_pitch * i_index / SCOPE_WIDTH
263 + p_outpic->p[1].i_lines * i_value / 512
264 * p_outpic->p[1].i_pitch) = 0xff;
267 i_value = *p_sample++ / 256 + 128;
269 + p_outpic->p[0].i_pitch * i_index / SCOPE_WIDTH
270 + p_outpic->p[0].i_lines * i_value / 512
271 * p_outpic->p[0].i_pitch) = 0x9f;
273 + p_outpic->p[2].i_pitch * i_index / SCOPE_WIDTH
274 + p_outpic->p[2].i_lines * i_value / 512
275 * p_outpic->p[2].i_pitch) = 0xdd;
279 /* Display the picture - FIXME: find a better date :-) */
280 vout_DatePicture( p_aout->p_sys->p_vout, p_outpic,
281 p_aout->date + i_image * 20000 );
282 vout_DisplayPicture( p_aout->p_sys->p_vout, p_outpic );
284 p_buffer += SCOPE_WIDTH * 4;
288 /*****************************************************************************
289 * aout_Close: close the Esound socket
290 *****************************************************************************/
291 static void aout_Close( aout_thread_t *p_aout )
293 p_aout->p_sys->aout.pf_close( &p_aout->p_sys->aout );
294 module_Unneed( p_aout->p_sys->aout.p_module );
295 vout_DestroyThread( p_aout->p_sys->p_vout, NULL );
296 free( p_aout->p_sys );