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vlc/modules/video_output/vmem.c
Rémi Denis-Courmont 514a804f23 vmem: small memory leak
2008-06-16 22:21:36 +03:00

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/*****************************************************************************
* vmem.c: memory video driver for vlc
*****************************************************************************
* Copyright (C) 2008 the VideoLAN team
* $Id$
*
* Authors: Sam Hocevar <sam@zoy.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
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_vout.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 int LockPicture ( vout_thread_t *, picture_t * );
static int UnlockPicture ( vout_thread_t *, picture_t * );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
#define T_WIDTH N_( "Width" )
#define LT_WIDTH N_( "Video memory buffer width." )
#define T_HEIGHT N_( "Height" )
#define LT_HEIGHT N_( "Video memory buffer height." )
#define T_PITCH N_( "Pitch" )
#define LT_PITCH N_( "Video memory buffer pitch in bytes." )
#define T_CHROMA N_( "Chroma" )
#define LT_CHROMA N_( "Output chroma for the memory image as a 4-character " \
"string, eg. \"RV32\"." )
#define T_LOCK N_( "Lock function" )
#define LT_LOCK N_( "Address of the locking callback function. This " \
"function must return a valid memory address for use " \
"by the video renderer." )
#define T_UNLOCK N_( "Unlock function" )
#define LT_UNLOCK N_( "Address of the unlocking callback function" )
#define T_DATA N_( "Callback data" )
#define LT_DATA N_( "Data for the locking and unlocking functions" )
vlc_module_begin( );
set_description( N_( "Video memory module" ) );
set_shortname( N_("Video memory") );
set_category( CAT_VIDEO );
set_subcategory( SUBCAT_VIDEO_VOUT );
set_capability( "video output", 0 );
add_integer( "vmem-width", 320, NULL, T_WIDTH, LT_WIDTH, false );
add_integer( "vmem-height", 200, NULL, T_HEIGHT, LT_HEIGHT, false );
add_integer( "vmem-pitch", 640, NULL, T_PITCH, LT_PITCH, false );
add_string( "vmem-chroma", "RV16", NULL, T_CHROMA, LT_CHROMA, true );
add_string( "vmem-lock", "0", NULL, T_LOCK, LT_LOCK, true );
add_string( "vmem-unlock", "0", NULL, T_UNLOCK, LT_UNLOCK, true );
add_string( "vmem-data", "0", NULL, T_DATA, LT_DATA, true );
set_callbacks( Create, Destroy );
vlc_module_end();
/*****************************************************************************
* vout_sys_t: video output descriptor
*****************************************************************************/
struct vout_sys_t
{
int i_width, i_height, i_pitch;
void * (*pf_lock) (void *);
void (*pf_unlock) (void *);
void *p_data;
};
/*****************************************************************************
* 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->pf_init = Init;
p_vout->pf_end = End;
p_vout->pf_manage = NULL;
p_vout->pf_render = NULL;
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;
char *psz_chroma, *psz_tmp;
int i_width, i_height, i_pitch, i_chroma;
i_width = config_GetInt( p_vout, "vmem-width" );
i_height = config_GetInt( p_vout, "vmem-height" );
i_pitch = config_GetInt( p_vout, "vmem-pitch" );
psz_chroma = config_GetPsz( p_vout, "vmem-chroma" );
if( psz_chroma )
{
if( strlen( psz_chroma ) < 4 )
{
msg_Err( p_vout, "vmem-chroma should be 4 characters long" );
free( psz_chroma );
return VLC_EGENERIC;
}
i_chroma = VLC_FOURCC( psz_chroma[0], psz_chroma[1],
psz_chroma[2], psz_chroma[3] );
free( psz_chroma );
}
else
{
msg_Err( p_vout, "Cannot find chroma information." );
return VLC_EGENERIC;
}
psz_tmp = config_GetPsz( p_vout, "vmem-lock" );
p_vout->p_sys->pf_lock = (void * (*) (void *))(intptr_t)atoll( psz_tmp );
free( psz_tmp );
psz_tmp = config_GetPsz( p_vout, "vmem-unlock" );
p_vout->p_sys->pf_unlock = (void (*) (void *))(intptr_t)atoll( psz_tmp );
free( psz_tmp );
psz_tmp = config_GetPsz( p_vout, "vmem-data" );
p_vout->p_sys->p_data = (void *)(intptr_t)atoll( psz_tmp );
free( psz_tmp );
if( !p_vout->p_sys->pf_lock || !p_vout->p_sys->pf_unlock )
{
msg_Err( p_vout, "Invalid lock or unlock callbacks" );
return VLC_EGENERIC;
}
I_OUTPUTPICTURES = 0;
/* Initialize the output structure */
p_vout->output.i_chroma = i_chroma;
p_vout->output.pf_setpalette = NULL;
p_vout->output.i_width = i_width;
p_vout->output.i_height = i_height;
p_vout->output.i_aspect = p_vout->output.i_width
* VOUT_ASPECT_FACTOR / p_vout->output.i_height;
/* Define the bitmasks */
switch( i_chroma )
{
case VLC_FOURCC( 'R','V','1','5' ):
p_vout->output.i_rmask = 0x001f;
p_vout->output.i_gmask = 0x03e0;
p_vout->output.i_bmask = 0x7c00;
break;
case VLC_FOURCC( 'R','V','1','6' ):
p_vout->output.i_rmask = 0x001f;
p_vout->output.i_gmask = 0x07e0;
p_vout->output.i_bmask = 0xf800;
break;
case VLC_FOURCC( 'R','V','2','4' ):
p_vout->output.i_rmask = 0xff0000;
p_vout->output.i_gmask = 0x00ff00;
p_vout->output.i_bmask = 0x0000ff;
break;
case VLC_FOURCC( 'R','V','3','2' ):
p_vout->output.i_rmask = 0xff0000;
p_vout->output.i_gmask = 0x00ff00;
p_vout->output.i_bmask = 0x0000ff;
break;
}
/* 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_SUCCESS;
}
vout_InitPicture( 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 );
p_pic->p->i_pitch = i_pitch;
p_pic->pf_lock = LockPicture;
p_pic->pf_unlock = UnlockPicture;
p_pic->i_status = DESTROYED_PICTURE;
p_pic->i_type = DIRECT_PICTURE;
PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
I_OUTPUTPICTURES++;
return VLC_SUCCESS;
}
/*****************************************************************************
* End: terminate video thread output method
*****************************************************************************/
static void End( vout_thread_t *p_vout )
{
(void)p_vout;
}
/*****************************************************************************
* 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 */
free( p_vout->p_sys );
}
/*****************************************************************************
* LockPicture: lock a picture
*****************************************************************************
* This function locks the picture and prepares it for direct pixel access.
*****************************************************************************/
static int LockPicture( vout_thread_t *p_vout, picture_t *p_pic )
{
p_pic->p->p_pixels = p_vout->p_sys->pf_lock( p_vout->p_sys->p_data );
return VLC_SUCCESS;
}
/*****************************************************************************
* UnlockPicture: unlock a picture
*****************************************************************************
* This function unlocks a previously locked picture.
*****************************************************************************/
static int UnlockPicture( vout_thread_t *p_vout, picture_t *p_pic )
{
p_vout->p_sys->pf_unlock( p_vout->p_sys->p_data );
(void)p_pic;
return VLC_SUCCESS;
}
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