Commit ba0b9573 authored by Jean-Paul Saman's avatar Jean-Paul Saman

Patch from Søren Bøg <avacore@videolan.org> GSoC 2007

Overlay - Basic test/demonstration program
parent 16d46a1b
/*****************************************************************************
* overlay-test.c : test program for the dynamic overlay plugin
*****************************************************************************
* Copyright (C) 2007 the VideoLAN team
* $Id$
*
* Author: Søren Bøg <avacore@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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <sys/fcntl.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <unistd.h>
/*****************************************************************************
* Images
*****************************************************************************/
#define WIDTH 128
#define HEIGHT 128
char *p_imageRGBA;
void ImagesCreate( void ) {
char *p_data = p_imageRGBA;
for( size_t i = 0; i < HEIGHT; ++i ) {
for( size_t j = 0; j < HEIGHT; ++j ) {
*(p_data++) = i * 4 & 0xFF;
*(p_data++) = 0xFF;
*(p_data++) = 0x00;
*(p_data++) = j * 4 & 0xFF;
}
}
}
/*****************************************************************************
* I/O Helpers
*****************************************************************************/
int IsFailure( char *psz_text ) {
return strncmp( psz_text, "SUCCESS:", 8 );
}
/*****************************************************************************
* main
*****************************************************************************/
int main( int i_argc, char *ppsz_argv[] ) {
if( i_argc != 3 ) {
printf( "Incorrect number of parameters.\n"
"Usage is: %s command-fifo response-fifo\n", ppsz_argv[0] );
exit( -2 );
}
printf( "Creating shared memory..." );
int i_shmRGBA = shmget( IPC_PRIVATE, WIDTH * HEIGHT * 4, S_IRWXU );
if( i_shmRGBA == -1 ) {
printf( " failed\n" );
exit( -1 );
}
printf( " done. ID is %d\n", i_shmRGBA );
printf( "Attaching shared memory..." );
p_imageRGBA = shmat( i_shmRGBA, NULL, 0 );
if( p_imageRGBA == -1 ) {
printf( " failed\n" );
exit( -1 );
}
printf( " done\n" );
printf( "Queueing shared memory for destruction..." );
if( shmctl( i_shmRGBA, IPC_RMID, 0 ) == -1 ) {
printf( " failed\n" );
exit( -1 );
}
printf( " done\n" );
printf( "Generating images..." );
ImagesCreate();
printf( " done\n" );
printf( "Please make sure vlc is running.\n"
"You should append parameters similar to the following:\n"
"--sub-filter overlay --overlay-input %s --overlay-output %s\n",
ppsz_argv[1], ppsz_argv[2] );
printf( "Opening FIFOs..." );
FILE *f_cmd = fopen( ppsz_argv[1], "w" );
if( f_cmd == NULL ) {
printf( " failed\n" );
exit( -1 );
}
FILE *f_res = fopen( ppsz_argv[2], "r" );
if( f_res == NULL ) {
printf( " failed\n" );
exit( -1 );
}
printf( " done\n" );
printf( "Getting an overlay..." );
int i_overlay;
char psz_resp[9];
fprintf( f_cmd, "GenImage\n" );
fflush( f_cmd );
fscanf( f_res, "%8s", &psz_resp );
if( IsFailure( psz_resp ) ) {
printf( " failed\n" );
exit( -1 );
}
fscanf( f_res, "%d", &i_overlay );
printf( " done. Overlay is %d\n", i_overlay );
printf( "Sending data..." );
fprintf( f_cmd, "DataSharedMem %d %d %d RGBA %d\n", i_overlay, WIDTH,
HEIGHT, i_shmRGBA );
fflush( f_cmd );
fscanf( f_res, "%8s", &psz_resp );
if( IsFailure( psz_resp ) ) {
printf( " failed\n" );
exit( -1 );
}
printf( " done\n" );
printf( "Activating overlay..." );
fprintf( f_cmd, "SetVisibility %d 1\n", i_overlay );
fflush( f_cmd );
fscanf( f_res, "%8s", &psz_resp );
if( IsFailure( psz_resp ) ) {
printf( " failed\n" );
exit( -1 );
}
printf( " done\n" );
printf( "Sweeping alpha..." );
for( int i_alpha = 0xFF; i_alpha >= -0xFF ; i_alpha -= 8 ) {
fprintf( f_cmd, "SetAlpha %d %d\n", i_overlay, abs( i_alpha ) );
fflush( f_cmd );
fscanf( f_res, "%8s", &psz_resp );
if( IsFailure( psz_resp ) ) {
printf( " failed\n" );
exit( -1 );
}
usleep( 20000 );
}
fprintf( f_cmd, "SetAlpha %d 255\n", i_overlay );
fflush( f_cmd );
fscanf( f_res, "%8s", &psz_resp );
if( IsFailure( psz_resp ) ) {
printf( " failed\n" );
exit( -1 );
}
printf( " done\n" );
printf( "Circle motion..." );
for( float f_theta = 0; f_theta <= 2 * M_PI ; f_theta += M_PI / 64.0 ) {
fprintf( f_cmd, "SetPosition %d %d %d\n", i_overlay,
(int)( - cos( f_theta ) * 100.0 + 100.0 ),
(int)( - sin( f_theta ) * 100.0 + 100.0 ) );
fflush( f_cmd );
fscanf( f_res, "%8s", &psz_resp );
if( IsFailure( psz_resp ) ) {
printf( " failed\n" );
exit( -1 );
}
usleep( 20000 );
}
fprintf( f_cmd, "SetPosition %d 0 0\n", i_overlay );
fflush( f_cmd );
fscanf( f_res, "%8s", &psz_resp );
if( IsFailure( psz_resp ) ) {
printf( " failed\n" );
exit( -1 );
}
printf( " done\n" );
printf( "Removing image..." );
fprintf( f_cmd, "DeleteImage %d\n", i_overlay );
fflush( f_cmd );
fscanf( f_res, "%8s", &psz_resp );
if( IsFailure( psz_resp ) ) {
printf( " failed\n" );
exit( -1 );
}
printf( " done\n" );
}
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