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vlc/modules/video_output/image.c
Clément Stenac 61ddfd1628 Reuse the encoder
2004-12-29 16:15:50 +00:00

244 lines
8.5 KiB
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/*****************************************************************************
* image.c : image video output
*****************************************************************************
* Copyright (C) 2004 VideoLAN
* $Id: snapshot.c 8644 2004-09-05 16:53:04Z fkuehne $
*
* Authors: Clément Stenac <zorglub@videolan.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h>
#include <vlc/vlc.h>
#include <vlc/vout.h>
#include <vlc/intf.h>
#include "vlc_image.h"
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int Create ( vlc_object_t * );
static void Destroy ( vlc_object_t * );
static int Init ( vout_thread_t * );
static void End ( vout_thread_t *p_vout );
static void Display ( vout_thread_t *, picture_t * );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
#define FORMAT_TEXT N_( "Image format" )
#define FORMAT_LONGTEXT N_( "Set the format of the output image." )
#define RATIO_TEXT N_( "Recording ratio" )
#define RATIO_LONGTEXT N_( "Set the ratio of images that are recorded. "\
"3 means that one image out of three is recorded." )
#define PREFIX_TEXT N_( "Filename prefix" )
#define PREFIX_LONGTEXT N_( "Set the prefix of the filename. Output filename "\
"will have the form prefixNUMBER.format" )
static char *psz_format_list[] = { "png" };
static char *psz_format_list_text[] = { N_("PNG") };
vlc_module_begin( );
set_shortname( _( "Image" ) );
set_description( _( "Image video output" ) );
set_category( CAT_VIDEO );
set_subcategory( SUBCAT_VIDEO_VOUT );
set_capability( "video output", 0 );
add_string( "image-out-format", "png", NULL, FORMAT_TEXT, FORMAT_LONGTEXT,
VLC_FALSE );
change_string_list( psz_format_list, psz_format_list_text, 0 );
add_integer( "image-out-ratio", 3 , NULL, RATIO_TEXT, RATIO_LONGTEXT,
VLC_FALSE );
add_string( "image-out-prefix", "img", NULL, PREFIX_TEXT, PREFIX_LONGTEXT,
VLC_FALSE );
set_callbacks( Create, Destroy );
vlc_module_end();
/*****************************************************************************
* vout_sys_t: video output descriptor
*****************************************************************************/
struct vout_sys_t
{
char *psz_prefix; /* Prefix */
int i_ratio; /* Image ratio */
int i_current; /* Current image */
int i_frames; /* Number of frames */
image_handler_t *p_image;
};
#define FREE( p ) if( p ) { free( p ); p = NULL; }
/*****************************************************************************
* Create: allocates video thread
*****************************************************************************
* This function allocates and initializes a vout method.
*****************************************************************************/
static int Create( vlc_object_t *p_this )
{
vout_thread_t *p_vout = ( vout_thread_t * )p_this;
/* Allocate instance and initialize some members */
p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
if( ! p_vout->p_sys )
return VLC_ENOMEM;
p_vout->p_sys->psz_prefix =
var_CreateGetString( p_this, "image-out-prefix" );
p_vout->p_sys->i_ratio =
var_CreateGetInteger( p_this, "image-out-ratio" );
p_vout->p_sys->i_current = 0;
p_vout->p_sys->p_image = image_HandlerCreate( p_vout );
if( !p_vout->p_sys->p_image )
{
msg_Err( p_this, "unable to create image handler") ;
FREE( p_vout->p_sys->psz_prefix );
FREE( p_vout->p_sys );
return VLC_EGENERIC;
}
p_vout->pf_init = Init;
p_vout->pf_end = End;
p_vout->pf_manage = NULL;
p_vout->pf_render = Display;
p_vout->pf_display = NULL;
return VLC_SUCCESS;
}
/*****************************************************************************
* Init: initialize video thread
*****************************************************************************/
static int Init( vout_thread_t *p_vout )
{
int i_index;
picture_t *p_pic;
/* Initialize the output structure */
p_vout->output.i_chroma = p_vout->render.i_chroma;
p_vout->output.pf_setpalette = NULL;
p_vout->output.i_width = p_vout->render.i_width;
p_vout->output.i_height = p_vout->render.i_height;
p_vout->output.i_aspect = p_vout->output.i_width
* VOUT_ASPECT_FACTOR / p_vout->output.i_height;
p_vout->output.i_rmask = 0xff0000;
p_vout->output.i_gmask = 0x00ff00;
p_vout->output.i_bmask = 0x0000ff;
/* Try to initialize 1 direct buffer */
p_pic = NULL;
/* Find an empty picture slot */
for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
{
if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
{
p_pic = p_vout->p_picture + i_index;
break;
}
}
/* Allocate the picture */
if( p_pic == NULL )
{
return VLC_EGENERIC;
}
vout_AllocatePicture( VLC_OBJECT(p_vout), p_pic, p_vout->output.i_chroma,
p_vout->output.i_width, p_vout->output.i_height,
p_vout->output.i_aspect );
if( p_pic->i_planes == 0 )
{
return VLC_EGENERIC;
}
p_pic->i_status = DESTROYED_PICTURE;
p_pic->i_type = DIRECT_PICTURE;
PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
I_OUTPUTPICTURES++;
return VLC_SUCCESS;
}
/*****************************************************************************
* Destroy: destroy video thread
*****************************************************************************
* Terminate an output method created by Create
*****************************************************************************/
static void Destroy( vlc_object_t *p_this )
{
vout_thread_t *p_vout = ( vout_thread_t * )p_this;
/* Destroy structure */
image_HandlerDelete( p_vout->p_sys->p_image );
FREE( p_vout->p_sys->psz_prefix );
FREE( p_vout->p_sys );
}
/*****************************************************************************
* Display: displays previously rendered output
*****************************************************************************
* This function copies the rendered picture into our circular buffer.
*****************************************************************************/
static void Display( vout_thread_t *p_vout, picture_t *p_pic )
{
video_format_t fmt_in = {0}, fmt_out = {0};
char *psz_filename;
if( p_vout->p_sys->i_frames % p_vout->p_sys->i_ratio != 0 )
{
p_vout->p_sys->i_frames++;
return;
}
p_vout->p_sys->i_frames++;
psz_filename = (char *)malloc( strlen( p_vout->p_sys->psz_prefix ) +
10 );
fmt_in.i_chroma = p_vout->render.i_chroma;
fmt_out.i_width = fmt_in.i_width = p_vout->render.i_width;
fmt_out.i_height = fmt_in.i_height = p_vout->render.i_height;
p_vout->p_sys->i_current++;
sprintf( psz_filename, "%s%.6i.%s", p_vout->p_sys->psz_prefix,
p_vout->p_sys->i_current,
"png" );
image_WriteUrl( p_vout->p_sys->p_image, p_pic,
&fmt_in, &fmt_out, psz_filename ) ;
free( psz_filename );
return;
}
static void End( vout_thread_t *p_vout )
{
}
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