Commit 79ddd264 authored by Simon Latapie's avatar Simon Latapie

* logo.c : a little filter to put a PNG picture on video output (use mouse features :)

parent 1eeede38
dnl Autoconf settings for vlc
dnl $Id: configure.ac,v 1.22 2003/07/02 22:47:42 sam Exp $
dnl $Id: configure.ac,v 1.23 2003/07/03 19:25:51 garf Exp $
AC_INIT(vlc,0.6.0)
......@@ -1928,6 +1928,17 @@ You also need to check that you have a libogg posterior to the 1.0 release.])],
])
fi
dnl
dnl Video Filters
dnl
dnl
dnl png
dnl
AC_CHECK_HEADERS(png.h, [
AX_ADD_LDFLAGS([logo],[-lpng])
AX_ADD_PLUGINS([logo])])
dnl
dnl Video plugins
dnl
......
......@@ -7,4 +7,5 @@ SOURCES_clone = clone.c
SOURCES_crop = crop.c
SOURCES_motionblur = motionblur.c
SOURCES_osdtext = osd_text.c
SOURCES_logo = logo.c
noinst_HEADERS += filter_common.h
/*****************************************************************************
* logo.c : logo video plugin for vlc
*****************************************************************************
* Copyright (C) 2000, 2001, 2002, 2003 VideoLAN
* $Id: logo.c,v 1.1 2003/07/03 19:25:51 garf Exp $
*
* Authors: Simon Latapie <garf@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> /* malloc(), free() */
#include <string.h>
#include <png.h>
#include <vlc/vlc.h>
#include <vlc/vout.h>
#include "filter_common.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 * );
static void Render ( vout_thread_t *, picture_t * );
static int SendEvents( vlc_object_t *, char const *,
vlc_value_t, vlc_value_t, void * );
static int MouseEvent( vlc_object_t *, char const *,
vlc_value_t , vlc_value_t , void * );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
#define FILE_TEXT N_("Logo File")
#define FILE_LONGTEXT N_("It must be a PNG in RGBA 8bits (for now)")
#define POSX_TEXT N_("x postion of the logo")
#define POSX_LONGTEXT N_("You can move the logo by left-clicking on it" )
#define POSY_TEXT N_("y position of the logo")
#define POSY_LONGTEXT N_("You can move the logo by left-clicking on it" )
#define TRANS_TEXT N_("transparency of the logo")
#define TRANS_LONGTEXT N_("You can change it by middle-clicking and moving mouse left or right")
vlc_module_begin();
add_category_hint( N_("logo"), NULL, VLC_FALSE );
add_file( "logo_file", NULL, NULL, FILE_TEXT, FILE_LONGTEXT, VLC_FALSE );
add_integer( "logo_x", 0, NULL, POSX_TEXT, POSX_LONGTEXT, VLC_FALSE );
add_integer( "logo_y", 0, NULL, POSY_TEXT, POSY_LONGTEXT, VLC_FALSE );
add_float( "logo_transparency", 1, NULL, TRANS_TEXT, TRANS_LONGTEXT, VLC_FALSE );
set_description( _("logo video filter") );
set_capability( "video filter", 0 );
add_shortcut( "logo" );
set_callbacks( Create, Destroy );
vlc_module_end();
/*****************************************************************************
* vout_sys_t: logo video output method descriptor
*****************************************************************************
* This structure is part of the video output thread descriptor.
* It describes the Invert specific properties of an output thread.
*****************************************************************************/
struct vout_sys_t
{
vout_thread_t *p_vout;
png_uint_32 height;
int bit_depth;
png_uint_32 width;
uint8_t * png_image[3];
uint8_t * png_image_u;
uint8_t * png_image_v;
uint8_t * png_image_a[3];
uint8_t * png_image_a_little;
int error;
int posx, posy;
int trans;
};
/*****************************************************************************
* Create: allocates logo video thread output method
*****************************************************************************
* This function allocates and initializes a Invert vout method.
*****************************************************************************/
static int Create( vlc_object_t *p_this )
{
vout_thread_t *p_vout = (vout_thread_t *)p_this;
/* Allocate structure */
p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
if( p_vout->p_sys == NULL )
{
msg_Err( p_vout, "out of memory" );
return VLC_ENOMEM;
}
p_vout->pf_init = Init;
p_vout->pf_end = End;
p_vout->pf_manage = NULL;
p_vout->pf_render = Render;
p_vout->pf_display = NULL;
return VLC_SUCCESS;
}
/*****************************************************************************
* Init: initialize logo video thread output method
*****************************************************************************/
static int Init( vout_thread_t *p_vout )
{
int i_index;
picture_t *p_pic;
char * filename;
/* read png file */
filename = config_GetPsz( p_vout, "logo_file" );
FILE *fp = fopen( filename , "rb");
png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL , NULL , NULL);
png_infop info_ptr = png_create_info_struct(png_ptr);
int color_type;
int interlace_type;
int compression_type;
int filter_type;
png_bytep * row_pointers;
unsigned int i;
unsigned int j;
int temp;
int i_size;
if (fp == NULL)
{
p_vout->p_sys->error=1;
msg_Err( p_vout , "file not found %s", filename );
free( filename );
} else
{
free( filename );
p_vout->p_sys->error=0;
png_init_io(png_ptr, fp);
png_read_info(png_ptr, info_ptr);
png_get_IHDR(png_ptr, info_ptr, &p_vout->p_sys->width, &p_vout->p_sys->height,
&p_vout->p_sys->bit_depth, &color_type, &interlace_type,
&compression_type, &filter_type);
row_pointers= malloc( sizeof(png_bytep) * p_vout->p_sys->height );
for( i = 0; i < p_vout->p_sys->height; i++ )
{
row_pointers[i] = malloc( 4 * ( p_vout->p_sys->bit_depth + 7 ) / 8 * p_vout->p_sys->width );
}
png_read_image(png_ptr, row_pointers);
fclose(fp);
/* finish to read the image in the file. Now We have to convert it YUV */
/* initialize yuv plans of the image */
i_size = p_vout->p_sys->height * p_vout->p_sys->width;
p_vout->p_sys->png_image[0] = malloc( i_size );
p_vout->p_sys->png_image[1] = malloc( i_size / 4 );
p_vout->p_sys->png_image[2] = malloc( i_size / 4 );
p_vout->p_sys->png_image_a[0] = malloc( i_size );
p_vout->p_sys->png_image_a[1] = malloc( i_size / 4 );
p_vout->p_sys->png_image_a[2] = p_vout->p_sys->png_image_a[1];
/* conversion */
j = 0;
for( i= 0; i < p_vout->p_sys->height * p_vout->p_sys->width ; i++)
{
uint8_t (*p)[4];
int x;
int y;
x = i % p_vout->p_sys->width;
y = i / p_vout->p_sys->width;
/* FIXME FIXME */
p = (void*)row_pointers[y];
p_vout->p_sys->png_image_a[0][i]= p[x][3];
p_vout->p_sys->png_image[0][i]= (p[x][0] * 257
+ p[x][1] * 504
+ p[x][2] * 98)/1000 + 16;
if( ( x % 2 == 0 ) && ( y % 2 == 0 ) )
{
temp = (p[x][2] * 439
- p[x][0] * 148
- p[x][1] * 291)/1000 + 128;
temp = (uint8_t)( temp < 0 ? 0 : temp );
p_vout->p_sys->png_image[1][j] = temp;
temp = ( p[x][0] * 439
- p[x][1] * 368
- p[x][2] * 71)/1000 + 128;
temp = __MAX( __MIN( temp, 255 ), 0 );
p_vout->p_sys->png_image[2][j] = (uint8_t)( temp < 0 ? 0 : temp );
p_vout->p_sys->png_image_a[1][j] = p_vout->p_sys->png_image_a[0][i];
j++;
}
}
/* now we can free row_pointers*/
free(row_pointers);
}
I_OUTPUTPICTURES = 0;
/* Initialize the output structure */
p_vout->output.i_chroma = p_vout->render.i_chroma;
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->render.i_aspect;
/* Try to open the real video output */
msg_Dbg( p_vout, "spawning the real video output" );
p_vout->p_sys->p_vout = vout_Create( p_vout,
p_vout->render.i_width, p_vout->render.i_height,
p_vout->render.i_chroma, p_vout->render.i_aspect );
/* Everything failed */
if( p_vout->p_sys->p_vout == NULL )
{
msg_Err( p_vout, "can't open vout, aborting" );
return VLC_EGENERIC;
}
var_AddCallback( p_vout->p_sys->p_vout, "mouse-x", MouseEvent, p_vout);
var_AddCallback( p_vout->p_sys->p_vout, "mouse-y", MouseEvent, p_vout);
ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
p_vout->p_sys->posx = config_GetInt( p_vout, "logo_x" );
p_vout->p_sys->posy = config_GetInt( p_vout, "logo_y" );
p_vout->p_sys->trans = (int)(config_GetFloat( p_vout, "logo_transparency" ) * 255);
return VLC_SUCCESS;
}
/*****************************************************************************
* End: terminate logo video thread output method
*****************************************************************************/
static void End( vout_thread_t *p_vout )
{
int i_index;
/* Free the fake output buffers we allocated */
for( i_index = I_OUTPUTPICTURES ; i_index ; )
{
i_index--;
free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
}
var_DelCallback( p_vout->p_sys->p_vout, "mouse-x", MouseEvent, p_vout);
var_DelCallback( p_vout->p_sys->p_vout, "mouse-y", MouseEvent, p_vout);
DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
vlc_object_detach( p_vout->p_sys->p_vout );
vout_Destroy( p_vout->p_sys->p_vout );
config_PutInt( p_vout, "logo_x", p_vout->p_sys->posx );
config_PutInt( p_vout, "logo_y", p_vout->p_sys->posy );
config_PutFloat( p_vout, "logo_transparency", (float)(p_vout->p_sys->trans) / 255.0 );
if (p_vout->p_sys->error == 0)
{
free(p_vout->p_sys->png_image[0]);
free(p_vout->p_sys->png_image[1]);
free(p_vout->p_sys->png_image[2]);
free(p_vout->p_sys->png_image_a[0]);
free(p_vout->p_sys->png_image_a[1]);
}
}
/*****************************************************************************
* Destroy: destroy logo video thread output method
*****************************************************************************
* Terminate an output method created by InvertCreateOutputMethod
*****************************************************************************/
static void Destroy( vlc_object_t *p_this )
{
vout_thread_t *p_vout = (vout_thread_t *)p_this;
free( p_vout->p_sys );
}
/*****************************************************************************
* Render: displays previously rendered output
*****************************************************************************
* This function send the currently rendered image to Invert image, waits
* until it is displayed and switch the two rendering buffers, preparing next
* frame.
*****************************************************************************/
static void Render( vout_thread_t *p_vout, picture_t *p_pic )
{
picture_t *p_outpic;
int i_index;
int i_pic_width;
int tr;
/* This is a new frame. Get a structure from the video_output. */
while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
== NULL )
{
if( p_vout->b_die || p_vout->b_error )
{
return;
}
msleep( VOUT_OUTMEM_SLEEP );
}
vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
i_pic_width=p_vout->output.i_width;
tr = p_vout->p_sys->trans;
for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
{
memcpy( p_outpic->p[i_index].p_pixels,
p_pic->p[i_index].p_pixels,
p_pic->p[i_index].i_lines * p_pic->p[i_index].i_pitch);
if (p_vout->p_sys->error == 0)
{
unsigned int i;
unsigned int j;
uint8_t *p_out, *p_in_a, *p_in;
int i_delta;
unsigned int i_max;
unsigned int j_max;
if (i_index == 0)
{
p_out = p_outpic->p[i_index].p_pixels + p_vout->p_sys->posy * i_pic_width + p_vout->p_sys->posx;
i_delta = i_pic_width - p_vout->p_sys->width;
i_max = p_vout->p_sys->height;
j_max = p_vout->p_sys->width;
} else
{
p_out = p_outpic->p[i_index].p_pixels + (p_vout->p_sys->posy / 2)* (i_pic_width / 2) + p_vout->p_sys->posx / 2;
i_delta = (i_pic_width - p_vout->p_sys->width) / 2;
i_max = p_vout->p_sys->height / 2;
j_max = p_vout->p_sys->width / 2;
}
p_in_a = p_vout->p_sys->png_image_a[i_index];
p_in = p_vout->p_sys->png_image[i_index];
for( i = 0; i < i_max ; i++ )
{
for( j = 0 ; j < j_max ; j++)
{
*p_out = ( *p_out * ( 65025 - *p_in_a * tr) + *p_in * *p_in_a * tr) >> 16;
p_out++;
p_in++;
p_in_a++;
}
p_out += i_delta;
}
}
}
vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
}
/*****************************************************************************
* SendEvents: forward mouse and keyboard events to the parent p_vout
*****************************************************************************/
static int SendEvents( vlc_object_t *p_this, char const *psz_var,
vlc_value_t oldval, vlc_value_t newval, void *p_data )
{
var_Set( (vlc_object_t *)p_data, psz_var, newval );
return VLC_SUCCESS;
}
/*****************************************************************************
* MouseEvent: callback for mouse events
******************************************************************************/
static int MouseEvent( vlc_object_t *p_this, char const *psz_var,
vlc_value_t oldval, vlc_value_t newval, void *p_data )
{
vout_thread_t *p_vout = (vout_thread_t*)p_data;
vlc_value_t valb;
int i_delta;
#define posx p_vout->p_sys->posx
#define posy p_vout->p_sys->posy
#define width p_vout->p_sys->width
#define height p_vout->p_sys->height
#define trans p_vout->p_sys->trans
var_Get( p_vout->p_sys->p_vout, "mouse-button-down", &valb );
i_delta = newval.i_int - oldval.i_int;
if ((valb.i_int & 0x2) == 2 && psz_var[6] == 'x' )
{
trans = __MIN( __MAX( trans + i_delta , 0 ) , 255 );
return VLC_SUCCESS;
}
if ((valb.i_int & 0x1) == 0)
{
return VLC_SUCCESS;
}
if( psz_var[6] == 'x' )
{
vlc_value_t valy;
var_Get( p_vout->p_sys->p_vout, "mouse-y", &valy );
if ((newval.i_int >= (int)posx) && (valy.i_int >= (int)posy) && (newval.i_int <= (int)(posx + width)) && (valy.i_int <= (int)(posy + height)))
{
posx = __MIN( __MAX( posx + i_delta , 0 ) , p_vout->output.i_width - width );
}
}
else if( psz_var[6] == 'y' )
{
vlc_value_t valx;
var_Get( p_vout->p_sys->p_vout, "mouse-x", &valx );
if ((valx.i_int >= (int)posx) && (newval.i_int >= (int)posy) && (valx.i_int <= (int)(posx + width)) && (newval.i_int <= (int)(posy + height)))
{
posy = __MIN( __MAX( posy + i_delta , 0 ) , p_vout->output.i_height - height );
}
}
else if( psz_var[6] == 'c' )
{
if ((valb.i_int & 0x8) == 1)
{
p_vout->p_sys->trans++;
}
else if ((valb.i_int & 0x10) == 1)
{
p_vout->p_sys->trans--;
}
}
#undef posx
#undef posy
#undef width
#undef height
#undef trans
return VLC_SUCCESS;
}
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment