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video_out_null.c

00001 /*
00002  * video_out_null.c
00003  * Copyright (C) 2000-2002 Michel Lespinasse <walken@zoy.org>
00004  * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
00005  *
00006  * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
00007  * See http://libmpeg2.sourceforge.net/ for updates.
00008  *
00009  * mpeg2dec is free software; you can redistribute it and/or modify
00010  * it under the terms of the GNU General Public License as published by
00011  * the Free Software Foundation; either version 2 of the License, or
00012  * (at your option) any later version.
00013  *
00014  * mpeg2dec is distributed in the hope that it will be useful,
00015  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00016  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00017  * GNU General Public License for more details.
00018  *
00019  * You should have received a copy of the GNU General Public License
00020  * along with this program; if not, write to the Free Software
00021  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00022  */
00023 
00024 #include "config.h"
00025 
00026 #include <stdlib.h>
00027 #include <inttypes.h>
00028 
00029 #include "video_out.h"
00030 #include "convert.h"
00031 
00032 static void null_draw_frame (vo_instance_t * instance,
00033                              uint8_t * const * buf, void * id)
00034 {
00035 }
00036 
00037 static vo_instance_t * internal_open (int setup (vo_instance_t *, int, int,
00038                                                  vo_setup_result_t *))
00039 {
00040     vo_instance_t * instance;
00041 
00042     instance = (vo_instance_t *) malloc (sizeof (vo_instance_t));
00043     if (instance == NULL)
00044         return NULL;
00045 
00046     instance->setup = setup;
00047     instance->setup_fbuf = NULL;
00048     instance->set_fbuf = NULL;
00049     instance->start_fbuf = NULL;
00050     instance->draw = null_draw_frame;
00051     instance->discard = NULL;
00052     instance->close = NULL;
00053 
00054     return instance;
00055 }
00056 
00057 static int null_setup (vo_instance_t * instance, int width, int height,
00058                        vo_setup_result_t * result)
00059 {
00060     result->convert = NULL;
00061     return 0;
00062 }
00063 
00064 vo_instance_t * vo_null_open (void)
00065 {
00066     return internal_open (null_setup);
00067 }
00068 
00069 static void nullslice_start (void * id, uint8_t * const * dest, int flags)
00070 {
00071 }
00072 
00073 static void nullslice_copy (void * id, uint8_t * const * src,
00074                             unsigned int v_offset)
00075 {
00076 }
00077 
00078 static void nullslice_convert (int width, int height, uint32_t accel,
00079                                void * arg, convert_init_t * result)
00080 {
00081     result->id_size = 0;
00082     result->buf_size[0] = result->buf_size[1] = result->buf_size[2] = 0;
00083     result->start = nullslice_start;
00084     result->copy = nullslice_copy;
00085 }
00086 
00087 static int nullslice_setup (vo_instance_t * instance, int width, int height,
00088                             vo_setup_result_t * result)
00089 {
00090     result->convert = nullslice_convert;
00091     return 0;
00092 }
00093 
00094 vo_instance_t * vo_nullslice_open (void)
00095 {
00096     return internal_open (nullslice_setup);
00097 }
00098 
00099 static int nullrgb16_setup (vo_instance_t * instance, int width, int height,
00100                             vo_setup_result_t * result)
00101 {
00102     result->convert = convert_rgb16;
00103     return 0;
00104 }
00105 
00106 static int nullrgb32_setup (vo_instance_t * instance, int width, int height,
00107                             vo_setup_result_t * result)
00108 {
00109     result->convert = convert_rgb32;
00110     return 0;
00111 }
00112 
00113 vo_instance_t * vo_nullrgb16_open (void)
00114 {
00115     return internal_open (nullrgb16_setup);
00116 }
00117 
00118 vo_instance_t * vo_nullrgb32_open (void)
00119 {
00120     return internal_open (nullrgb32_setup);
00121 }
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