* ./plugins/filter/crop.c: crop filter. Usage examples:

      --filter crop --crop-geometry 640x480
      --filter crop --crop-geometry 320x200+10+10

Makefile

@@ -102,6 +102,7 @@ PLUGINS_TARGETS := a52/a52 \
 		filter/filter_distort \
 		filter/filter_wall \
 		filter/filter_clone \
+		filter/filter_crop \
 		fx/fx_scope \
 		ggi/ggi \
 		glide/glide \

configure

@@ -5464,7 +5464,7 @@ case x"${target_cpu}" in
 esac
 
 BUILTINS="${BUILTINS} idct idctclassic motion imdct downmix chroma_i420_rgb chroma_i420_yuy2 chroma_i422_yuy2 chroma_i420_ymga mpeg_adec ac3_adec mpeg_vdec"
-PLUGINS="${PLUGINS} dummy null rc logger mpeg_es mpeg_ps mpeg_ts mpeg_audio file udp http ipv4 memcpy lpcm_adec ac3_spdif spudec filter_deinterlace filter_invert filter_wall filter_transform filter_distort filter_clone fx_scope"
+PLUGINS="${PLUGINS} dummy null rc logger mpeg_es mpeg_ps mpeg_ts mpeg_audio file udp http ipv4 memcpy lpcm_adec ac3_spdif spudec filter_deinterlace filter_invert filter_wall filter_transform filter_distort filter_clone filter_crop fx_scope"
 
 MMX_MODULES="memcpymmx idctmmx motionmmx chroma_i420_rgb_mmx chroma_i420_yuy2_mmx chroma_i422_yuy2_mmx chroma_i420_ymga_mmx"
 MMXEXT_MODULES="memcpymmxext idctmmxext motionmmxext"

configure.in

@@ -422,7 +422,7 @@ dnl
 dnl  default modules
 dnl
 BUILTINS="${BUILTINS} idct idctclassic motion imdct downmix chroma_i420_rgb chroma_i420_yuy2 chroma_i422_yuy2 chroma_i420_ymga mpeg_adec ac3_adec mpeg_vdec"
-PLUGINS="${PLUGINS} dummy null rc logger mpeg_es mpeg_ps mpeg_ts mpeg_audio file udp http ipv4 memcpy lpcm_adec ac3_spdif spudec filter_deinterlace filter_invert filter_wall filter_transform filter_distort filter_clone fx_scope"
+PLUGINS="${PLUGINS} dummy null rc logger mpeg_es mpeg_ps mpeg_ts mpeg_audio file udp http ipv4 memcpy lpcm_adec ac3_spdif spudec filter_deinterlace filter_invert filter_wall filter_transform filter_distort filter_clone filter_crop fx_scope"
 
 dnl
 dnl  Accelerated modules

plugins/filter/Makefile

@@ -4,3 +4,4 @@ filter_invert_SOURCES = invert.c
 filter_distort_SOURCES = distort.c
 filter_wall_SOURCES = wall.c
 filter_clone_SOURCES = clone.c
+filter_crop_SOURCES = crop.c

plugins/filter/crop.c

+/*****************************************************************************
+ * crop.c : Crop video plugin for vlc
+ *****************************************************************************
+ * Copyright (C) 2002 VideoLAN
+ * $Id: crop.c,v 1.1.2.1 2002/06/02 00:43:43 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.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+#include <errno.h>
+#include <stdlib.h>                                      /* malloc(), free() */
+#include <string.h>
+
+#include <videolan/vlc.h>
+
+#include "video.h"
+#include "video_output.h"
+
+#include "filter_common.h"
+
+/*****************************************************************************
+ * Capabilities defined in the other files.
+ *****************************************************************************/
+static void vout_getfunctions( function_list_t * p_function_list );
+
+/*****************************************************************************
+ * Build configuration tree.
+ *****************************************************************************/
+MODULE_CONFIG_START
+ADD_CATEGORY_HINT( N_("Miscellaneous"), NULL )
+ADD_STRING ( "crop-geometry", NULL, NULL, N_("Crop geometry"), N_("Set the geometry of the zone to crop") )
+//ADD_BOOL ( "autocrop", 0, NULL, N_("Automatic cropping"), N_("Activate automatic black border cropping") )
+MODULE_CONFIG_STOP
+
+MODULE_INIT_START
+    SET_DESCRIPTION( _("image crop video module") )
+    /* Capability score set to 0 because we don't want to be spawned
+     * as a video output unless explicitly requested to */
+    ADD_CAPABILITY( VOUT, 0 )
+    ADD_SHORTCUT( "crop" )
+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: Crop video output method descriptor
+ *****************************************************************************
+ * This structure is part of the video output thread descriptor.
+ * It describes the Crop specific properties of an output thread.
+ *****************************************************************************/
+typedef struct vout_sys_s
+{
+    vout_thread_t *p_vout;
+
+    unsigned int i_x, i_y;
+    unsigned int i_width, i_height, i_aspect;
+
+} vout_sys_t;
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+static int  vout_Create    ( vout_thread_t * );
+static int  vout_Init      ( vout_thread_t * );
+static void vout_End       ( vout_thread_t * );
+static void vout_Destroy   ( vout_thread_t * );
+static int  vout_Manage    ( vout_thread_t * );
+static void vout_Render    ( vout_thread_t *, picture_t * );
+static void vout_Display   ( vout_thread_t *, picture_t * );
+
+/*****************************************************************************
+ * 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->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_render     = vout_Render;
+    p_function_list->functions.vout.pf_display    = vout_Display;
+}
+
+/*****************************************************************************
+ * vout_Create: allocates Crop video thread output method
+ *****************************************************************************
+ * This function allocates and initializes a Crop 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( "vout error: out of memory" );
+        return 1;
+    }
+
+    return 0;
+}
+
+/*****************************************************************************
+ * vout_Init: initialize Crop video thread output method
+ *****************************************************************************/
+static int vout_Init( vout_thread_t *p_vout )
+{
+    int   i_index;
+    char *psz_var;
+    picture_t *p_pic;
+    
+    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;
+
+    /* Get geometry value from the user */
+    psz_var = config_GetPszVariable( "crop-geometry" );
+    if( psz_var )
+    {
+        char *psz_parser, *psz_tmp;
+
+        psz_parser = psz_tmp = psz_var;
+        while( *psz_tmp && *psz_tmp != 'x' ) psz_tmp++;
+
+        if( *psz_tmp )
+        {
+            psz_tmp[0] = '\0';
+            p_vout->p_sys->i_width = atoi( psz_parser );
+
+            psz_parser = ++psz_tmp;
+            while( *psz_tmp && *psz_tmp != '+' ) psz_tmp++;
+
+            if( *psz_tmp )
+            {
+                psz_tmp[0] = '\0';
+                p_vout->p_sys->i_height = atoi( psz_parser );
+
+                psz_parser = ++psz_tmp;
+                while( *psz_tmp && *psz_tmp != '+' ) psz_tmp++;
+
+                if( *psz_tmp )
+                {
+                    psz_tmp[0] = '\0';
+                    p_vout->p_sys->i_x = atoi( psz_parser );
+                    p_vout->p_sys->i_y = atoi( ++psz_tmp );
+                }
+                else
+                {
+                    p_vout->p_sys->i_x = atoi( psz_parser );
+                    p_vout->p_sys->i_y =
+                     ( p_vout->output.i_height - p_vout->p_sys->i_height ) / 2;
+                }
+            }
+            else
+            {
+                p_vout->p_sys->i_height = atoi( psz_parser );
+                p_vout->p_sys->i_x =
+                     ( p_vout->output.i_width - p_vout->p_sys->i_width ) / 2;
+                p_vout->p_sys->i_y =
+                     ( p_vout->output.i_height - p_vout->p_sys->i_height ) / 2;
+            }
+        }
+        else
+        {
+            p_vout->p_sys->i_width = atoi( psz_parser );
+            p_vout->p_sys->i_height = p_vout->output.i_height;
+            p_vout->p_sys->i_x =
+                     ( p_vout->output.i_width - p_vout->p_sys->i_width ) / 2;
+            p_vout->p_sys->i_y =
+                     ( p_vout->output.i_height - p_vout->p_sys->i_height ) / 2;
+        }
+
+        free( psz_var );
+    }
+    else
+    {
+        p_vout->p_sys->i_width  = p_vout->output.i_width;
+        p_vout->p_sys->i_height = p_vout->output.i_height;
+        p_vout->p_sys->i_x =
+                     ( p_vout->output.i_width - p_vout->p_sys->i_width ) / 2;
+        p_vout->p_sys->i_y =
+                     ( p_vout->output.i_height - p_vout->p_sys->i_height ) / 2;
+    }
+
+    /* Check for validity */
+    if( p_vout->p_sys->i_x + p_vout->p_sys->i_width > p_vout->output.i_width )
+    {
+        p_vout->p_sys->i_x = 0;
+        if( p_vout->p_sys->i_width > p_vout->output.i_width )
+        {
+            p_vout->p_sys->i_width = p_vout->output.i_width;
+        }
+    }
+
+    if( p_vout->p_sys->i_y + p_vout->p_sys->i_height > p_vout->output.i_height )
+    {
+        p_vout->p_sys->i_y = 0;
+        if( p_vout->p_sys->i_height > p_vout->output.i_height )
+        {
+            p_vout->p_sys->i_height = p_vout->output.i_height;
+        }
+    }
+
+    intf_WarnMsg( 3, "vout info: cropping at %ix%i+%i+%i",
+                  p_vout->p_sys->i_width, p_vout->p_sys->i_height,
+                  p_vout->p_sys->i_x, p_vout->p_sys->i_y );
+
+    /* Set current output image properties */
+    p_vout->p_sys->i_aspect = p_vout->output.i_aspect
+                            * p_vout->output.i_height / p_vout->p_sys->i_height
+                            * p_vout->p_sys->i_width / p_vout->output.i_width;
+
+    /* Try to open the real video output */
+    psz_var = config_GetPszVariable( "filter" );
+    config_PutPszVariable( "filter", NULL );
+
+    intf_WarnMsg( 3, "vout info: spawning the real video outputs" );
+
+    p_vout->p_sys->p_vout =
+        vout_CreateThread( NULL,
+                    p_vout->p_sys->i_width, p_vout->p_sys->i_height,
+                    p_vout->render.i_chroma, p_vout->p_sys->i_aspect );
+    if( p_vout->p_sys->p_vout == NULL )
+    {
+        intf_ErrMsg( "vout error: failed to create vout" );
+        config_PutPszVariable( "filter", psz_var );
+        if( psz_var ) free( psz_var );
+        return 0;
+    }
+
+    config_PutPszVariable( "filter", psz_var );
+    if( psz_var ) free( psz_var );
+
+    ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
+
+    return 0;
+}
+
+/*****************************************************************************
+ * vout_End: terminate Crop 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 ]->p_data_orig );
+    }
+}
+
+/*****************************************************************************
+ * vout_Destroy: destroy Crop video thread output method
+ *****************************************************************************
+ * Terminate an output method created by CropCreateOutputMethod
+ *****************************************************************************/
+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 Crop 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_Render: display previously rendered output
+ *****************************************************************************
+ * This function sends the currently rendered image to Crop image, waits
+ * until it is displayed and switches the two rendering buffers, preparing next
+ * frame.
+ *****************************************************************************/
+static void vout_Render( vout_thread_t *p_vout, picture_t *p_pic )
+{
+    picture_t *p_outpic = NULL;
+    int i_plane;
+
+    while( ( p_outpic =
+                 vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 )
+           ) == NULL )
+    {
+        if( p_vout->b_die || p_vout->b_error )
+        {
+            vout_DestroyPicture( p_vout->p_sys->p_vout, p_outpic );
+            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 );
+
+    for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
+    {
+        u8 *p_in, *p_out, *p_out_end;
+        int i_in_pitch = p_pic->p[i_plane].i_pitch;
+        const int i_out_pitch = p_outpic->p[i_plane].i_pitch;
+
+        p_in = p_pic->p[i_plane].p_pixels
+                /* Skip the right amount of lines */
+                + i_in_pitch * ( p_pic->p[i_plane].i_lines * p_vout->p_sys->i_y
+                                  / p_vout->output.i_height )
+                /* Skip the right amount of columns */
+                + i_in_pitch * p_vout->p_sys->i_x / p_vout->output.i_width;
+
+        p_out = p_outpic->p[i_plane].p_pixels;
+        p_out_end = p_out + i_out_pitch * p_outpic->p[i_plane].i_lines;
+
+        while( p_out < p_out_end )
+        {
+            FAST_MEMCPY( p_out, p_in, i_out_pitch );
+            p_in += i_in_pitch;
+            p_out += i_out_pitch;
+        }
+    }
+
+    vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
+    vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
+}
+
+/*****************************************************************************
+ * vout_Display: 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 vout_Display( vout_thread_t *p_vout, picture_t *p_pic )
+{
+    ;
+}
+