--- /dev/null
+/*****************************************************************************
+ * 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/vlc.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 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( _( "Video memory module" ) );
+ set_shortname( _("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, VLC_FALSE );
+ add_integer( "vmem-height", 200, NULL, T_HEIGHT, LT_HEIGHT, VLC_FALSE );
+ add_integer( "vmem-pitch", 640, NULL, T_PITCH, LT_PITCH, VLC_FALSE );
+ add_string( "vmem-chroma", "RV16", NULL, T_CHROMA, LT_CHROMA, VLC_TRUE );
+ add_string( "vmem-lock", "0", NULL, T_LOCK, LT_LOCK, VLC_TRUE );
+ add_string( "vmem-unlock", "0", NULL, T_UNLOCK, LT_UNLOCK, VLC_TRUE );
+ add_string( "vmem-data", "0", NULL, T_DATA, LT_DATA, VLC_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 = NULL;
+ 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" );
+ 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;
+}
+
+/*****************************************************************************
+ * 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;
+}
+
projects / vlc / commitdiff