--- /dev/null
+/*****************************************************************************
+ * bob422.c : 422 to 420 video plugin for vlc
+ *****************************************************************************
+ * Copyright (C) 2000, 2001 VideoLAN
+ * $Id: bob422.c,v 1.1 2001/12/17 05:33:56 sam Exp $
+ *
+ * Authors: Samuel 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ *****************************************************************************/
+
+#define MODULE_NAME filter_bob422
+#include "modules_inner.h"
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+#include "defs.h"
+
+#include <errno.h>
+#include <stdlib.h> /* malloc(), free() */
+#include <string.h>
+
+#include "common.h" /* boolean_t, byte_t */
+#include "intf_msg.h"
+#include "threads.h"
+#include "mtime.h"
+#include "tests.h"
+
+#include "video.h"
+#include "video_output.h"
+
+#include "modules.h"
+#include "modules_export.h"
+
+#define BOB422_MAX_DIRECTBUFFERS 8
+
+/*****************************************************************************
+ * Capabilities defined in the other files.
+ *****************************************************************************/
+static void vout_getfunctions( function_list_t * p_function_list );
+
+/*****************************************************************************
+ * Build configuration tree.
+ *****************************************************************************/
+MODULE_CONFIG_START
+ADD_WINDOW( "Configuration for bob422 module" )
+ ADD_COMMENT( "Ha, ha -- nothing to configure yet" )
+MODULE_CONFIG_STOP
+
+MODULE_INIT_START
+ p_module->i_capabilities = MODULE_CAPABILITY_NULL
+ | MODULE_CAPABILITY_VOUT;
+ p_module->psz_longname = "4:2:2 BOB deinterlacing module";
+MODULE_INIT_STOP
+
+MODULE_ACTIVATE_START
+ vout_getfunctions( &p_module->p_functions->vout );
+MODULE_ACTIVATE_STOP
+
+MODULE_DEACTIVATE_START
+MODULE_DEACTIVATE_STOP
+
+/*****************************************************************************
+ * vout_sys_t: Bob422 video output method descriptor
+ *****************************************************************************
+ * This structure is part of the video output thread descriptor.
+ * It describes the Bob422 specific properties of an output thread.
+ *****************************************************************************/
+typedef struct vout_sys_s
+{
+ struct vout_thread_s *p_vout;
+
+} vout_sys_t;
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int vout_Probe ( probedata_t *p_data );
+static int vout_Create ( struct vout_thread_s * );
+static int vout_Init ( struct vout_thread_s * );
+static void vout_End ( struct vout_thread_s * );
+static void vout_Destroy ( struct vout_thread_s * );
+static int vout_Manage ( struct vout_thread_s * );
+static void vout_Display ( struct vout_thread_s *, struct picture_s * );
+
+static int Bob422NewPicture( struct vout_thread_s *, struct picture_s * );
+
+/*****************************************************************************
+ * Functions exported as capabilities. They are declared as static so that
+ * we don't pollute the namespace too much.
+ *****************************************************************************/
+static void vout_getfunctions( function_list_t * p_function_list )
+{
+ p_function_list->pf_probe = vout_Probe;
+ p_function_list->functions.vout.pf_create = vout_Create;
+ p_function_list->functions.vout.pf_init = vout_Init;
+ p_function_list->functions.vout.pf_end = vout_End;
+ p_function_list->functions.vout.pf_destroy = vout_Destroy;
+ p_function_list->functions.vout.pf_manage = vout_Manage;
+ p_function_list->functions.vout.pf_display = vout_Display;
+ p_function_list->functions.vout.pf_setpalette = NULL;
+}
+
+/*****************************************************************************
+ * intf_Probe: return a score
+ *****************************************************************************/
+static int vout_Probe( probedata_t *p_data )
+{
+ if( TestMethod( VOUT_FILTER_VAR, "bob422" ) )
+ {
+ return( 999 );
+ }
+
+ /* If we weren't asked to filter, don't filter. */
+ return( 0 );
+}
+
+/*****************************************************************************
+ * vout_Create: allocates Bob422 video thread output method
+ *****************************************************************************
+ * This function allocates and initializes a Bob422 vout method.
+ *****************************************************************************/
+static int vout_Create( vout_thread_t *p_vout )
+{
+ /* Allocate structure */
+ p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
+ if( p_vout->p_sys == NULL )
+ {
+ intf_ErrMsg("error: %s", strerror(ENOMEM) );
+ return( 1 );
+ }
+
+ return( 0 );
+}
+
+/*****************************************************************************
+ * vout_Init: initialize Bob422 video thread output method
+ *****************************************************************************/
+static int vout_Init( vout_thread_t *p_vout )
+{
+ int i_index;
+ char *psz_filter;
+ picture_t *p_pic;
+
+ I_OUTPUTPICTURES = 0;
+
+ /* Try to open the real video output */
+ psz_filter = main_GetPszVariable( VOUT_FILTER_VAR, "" );
+ main_PutPszVariable( VOUT_FILTER_VAR, "" );
+
+ intf_WarnMsg( 1, "filter: spawning the real video output" );
+
+ p_vout->p_sys->p_vout =
+ vout_CreateThread( NULL,
+ p_vout->render.i_width, p_vout->render.i_height / 2,
+ YUV_420_PICTURE, p_vout->render.i_aspect );
+
+ /* Everything failed */
+ if( p_vout->p_sys->p_vout == NULL )
+ {
+ intf_ErrMsg( "filter error: can't open vout, aborting" );
+
+ return( 0 );
+ }
+
+ main_PutPszVariable( VOUT_FILTER_VAR, psz_filter );
+
+ /* Initialize the output structure */
+ switch( p_vout->render.i_chroma )
+ {
+ case YUV_422_PICTURE:
+ 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;
+ break;
+
+ default:
+ p_vout->output.i_chroma = EMPTY_PICTURE; /* unknown chroma */
+ break;
+ }
+
+ /* Try to initialize BOB422_MAX_DIRECTBUFFERS direct buffers */
+ while( I_OUTPUTPICTURES < BOB422_MAX_DIRECTBUFFERS )
+ {
+ 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( Bob422NewPicture( p_vout, p_pic ) )
+ {
+ break;
+ }
+
+ p_pic->i_status = DESTROYED_PICTURE;
+ p_pic->i_type = DIRECT_PICTURE;
+
+ p_pic->i_left_margin =
+ p_pic->i_right_margin =
+ p_pic->i_top_margin =
+ p_pic->i_bottom_margin = 0;
+
+ PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
+
+ I_OUTPUTPICTURES++;
+ }
+
+ return( 0 );
+}
+
+/*****************************************************************************
+ * vout_End: terminate Bob422 video thread output method
+ *****************************************************************************/
+static void vout_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 ]->planes[ 0 ].p_data );
+ }
+}
+
+/*****************************************************************************
+ * vout_Destroy: destroy Bob422 video thread output method
+ *****************************************************************************
+ * Terminate an output method created by Bob422CreateOutputMethod
+ *****************************************************************************/
+static void vout_Destroy( vout_thread_t *p_vout )
+{
+ vout_DestroyThread( p_vout->p_sys->p_vout, NULL );
+
+ free( p_vout->p_sys );
+}
+
+/*****************************************************************************
+ * vout_Manage: handle Bob422 events
+ *****************************************************************************
+ * This function should be called regularly by video output thread. It manages
+ * console events. It returns a non null value on error.
+ *****************************************************************************/
+static int vout_Manage( vout_thread_t *p_vout )
+{
+ return( 0 );
+}
+
+/*****************************************************************************
+ * vout_Display: displays previously rendered output
+ *****************************************************************************
+ * This function send the currently rendered image to Bob422 image, waits
+ * until it is displayed and switch the two rendering buffers, preparing next
+ * frame.
+ *****************************************************************************/
+static void vout_Display( vout_thread_t *p_vout, picture_t *p_inpic )
+{
+ picture_t *p_outpic;
+ int i_index, i_field;
+
+ for( i_field = 0 ; i_field < 2 ; i_field++ )
+ {
+ /* 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 );
+ }
+
+ /* XXX: completely arbitrary values ! */
+ vout_DatePicture( p_vout->p_sys->p_vout, p_outpic,
+ mdate() + (mtime_t)(60000 + i_field * 25000) );
+
+ /* Copy image and skip lines */
+ for( i_index = 0 ; i_index < p_inpic->i_planes ; i_index++ )
+ {
+ pixel_data_t *p_in, *p_end, *p_out;
+ int i_increment = ( ( i_index == Y_PLANE ) ? 2 : 4 )
+ * p_inpic->planes[ i_index ].i_line_bytes;
+
+ p_in = p_inpic->planes[ i_index ].p_data
+ + i_field * p_inpic->planes[ i_index ].i_line_bytes;
+
+ p_out = p_outpic->planes[ i_index ].p_data;
+ p_end = p_out + p_outpic->planes[ i_index ].i_bytes;
+
+ for( ; p_out < p_end ; )
+ {
+ p_main->fast_memcpy( p_out, p_in,
+ p_inpic->planes[ i_index ].i_line_bytes );
+
+ p_out += p_inpic->planes[ i_index ].i_line_bytes;
+ p_in += i_increment;
+ }
+ }
+
+ vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
+ }
+
+ vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
+}
+
+
+/*****************************************************************************
+ * Bob422NewPicture: allocate a picture
+ *****************************************************************************
+ * Returns 0 on success, -1 otherwise
+ *****************************************************************************/
+static int Bob422NewPicture( vout_thread_t *p_vout, picture_t *p_pic )
+{
+ int i_luma_bytes, i_chroma_bytes;
+
+ int i_width = p_vout->output.i_width;
+ int i_height = p_vout->output.i_height;
+
+ switch( p_vout->output.i_chroma )
+ {
+ /* We know this chroma, allocate a buffer which will be used
+ * directly by the decoder */
+ case YUV_422_PICTURE:
+
+ /* Precalculate some values */
+ p_pic->i_size = i_width * i_height;
+ p_pic->i_chroma_width = i_width / 2;
+ p_pic->i_chroma_size = i_height * ( i_width / 2 );
+
+ /* Allocate the memory buffer */
+ i_luma_bytes = p_pic->i_size * sizeof(pixel_data_t);
+ i_chroma_bytes = p_pic->i_chroma_size * sizeof(pixel_data_t);
+
+ /* Y buffer */
+ p_pic->planes[ Y_PLANE ].p_data = malloc( i_luma_bytes + 2 * i_chroma_bytes );
+ p_pic->planes[ Y_PLANE ].i_bytes = i_luma_bytes;
+ p_pic->planes[ Y_PLANE ].i_line_bytes = i_width * sizeof(pixel_data_t);
+
+ /* U buffer */
+ p_pic->planes[ U_PLANE ].p_data = p_pic->planes[ Y_PLANE ].p_data + i_height * i_width;
+ p_pic->planes[ U_PLANE ].i_bytes = i_chroma_bytes;
+ p_pic->planes[ U_PLANE ].i_line_bytes = p_pic->i_chroma_width * sizeof(pixel_data_t);
+
+ /* V buffer */
+ p_pic->planes[ V_PLANE ].p_data = p_pic->planes[ U_PLANE ].p_data + i_height * p_pic->i_chroma_width;
+ p_pic->planes[ V_PLANE ].i_bytes = i_chroma_bytes;
+ p_pic->planes[ V_PLANE ].i_line_bytes = p_pic->i_chroma_width * sizeof(pixel_data_t);
+
+ /* We allocated 3 planes */
+ p_pic->i_planes = 3;
+
+ return( 0 );
+ break;
+
+ /* Unknown chroma, do nothing */
+ default:
+
+ return( 0 );
+ break;
+ }
+}
+
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