mirror of
https://code.videolan.org/videolan/vlc
synced 2024-09-04 09:11:33 +02:00
510 lines
17 KiB
C
510 lines
17 KiB
C
/*****************************************************************************
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* transform.c : transform image module for vlc
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*****************************************************************************
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* Copyright (C) 2000-2004 the VideoLAN team
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* $Id$
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*
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* Authors: Samuel Hocevar <sam@zoy.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#include <stdlib.h> /* malloc(), free() */
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#include <string.h>
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#include <vlc/vlc.h>
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#include <vlc/vout.h>
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#include "filter_common.h"
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#define TRANSFORM_MODE_HFLIP 1
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#define TRANSFORM_MODE_VFLIP 2
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#define TRANSFORM_MODE_90 3
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#define TRANSFORM_MODE_180 4
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#define TRANSFORM_MODE_270 5
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/*****************************************************************************
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* Local prototypes
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*****************************************************************************/
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static int Create ( vlc_object_t * );
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static void Destroy ( vlc_object_t * );
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static int Init ( vout_thread_t * );
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static void End ( vout_thread_t * );
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static void Render ( vout_thread_t *, picture_t * );
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static int SendEvents( vlc_object_t *, char const *,
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vlc_value_t, vlc_value_t, void * );
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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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#define TYPE_TEXT N_("Transform type")
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#define TYPE_LONGTEXT N_("One of '90', '180', '270', 'hflip' and 'vflip'")
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static char *type_list[] = { "90", "180", "270", "hflip", "vflip" };
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static char *type_list_text[] = { N_("Rotate by 90 degrees"),
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N_("Rotate by 180 degrees"), N_("Rotate by 270 degrees"),
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N_("Flip horizontally"), N_("Flip vertically") };
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vlc_module_begin();
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set_description( _("Video transformation filter") );
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set_shortname( N_("Transformation"));
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set_capability( "video filter", 0 );
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set_category( CAT_VIDEO );
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set_subcategory( SUBCAT_VIDEO_VFILTER );
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add_string( "transform-type", "90", NULL,
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TYPE_TEXT, TYPE_LONGTEXT, VLC_FALSE);
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change_string_list( type_list, type_list_text, 0);
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add_shortcut( "transform" );
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set_callbacks( Create, Destroy );
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vlc_module_end();
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/*****************************************************************************
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* vout_sys_t: Transform video output method descriptor
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*****************************************************************************
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* This structure is part of the video output thread descriptor.
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* It describes the Transform specific properties of an output thread.
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*****************************************************************************/
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struct vout_sys_t
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{
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int i_mode;
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vlc_bool_t b_rotation;
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vout_thread_t *p_vout;
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};
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/*****************************************************************************
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* Control: control facility for the vout (forwards to child vout)
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*****************************************************************************/
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static int Control( vout_thread_t *p_vout, int i_query, va_list args )
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{
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return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
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}
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/*****************************************************************************
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* Create: allocates Transform video thread output method
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*****************************************************************************
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* This function allocates and initializes a Transform vout method.
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*****************************************************************************/
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static int Create( vlc_object_t *p_this )
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{
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vout_thread_t *p_vout = (vout_thread_t *)p_this;
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char *psz_method;
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/* Allocate structure */
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p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
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if( p_vout->p_sys == NULL )
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{
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msg_Err( p_vout, "out of memory" );
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return VLC_ENOMEM;
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}
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p_vout->pf_init = Init;
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p_vout->pf_end = End;
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p_vout->pf_manage = NULL;
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p_vout->pf_render = Render;
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p_vout->pf_display = NULL;
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p_vout->pf_control = Control;
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/* Look what method was requested */
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psz_method = config_GetPsz( p_vout, "transform-type" );
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if( psz_method == NULL )
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{
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msg_Err( p_vout, "configuration variable %s empty", "transform-type" );
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msg_Err( p_vout, "no valid transform mode provided, using '90'" );
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p_vout->p_sys->i_mode = TRANSFORM_MODE_90;
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p_vout->p_sys->b_rotation = 1;
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}
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else
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{
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if( !strcmp( psz_method, "hflip" ) )
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{
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p_vout->p_sys->i_mode = TRANSFORM_MODE_HFLIP;
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p_vout->p_sys->b_rotation = 0;
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}
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else if( !strcmp( psz_method, "vflip" ) )
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{
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p_vout->p_sys->i_mode = TRANSFORM_MODE_VFLIP;
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p_vout->p_sys->b_rotation = 0;
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}
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else if( !strcmp( psz_method, "90" ) )
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{
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p_vout->p_sys->i_mode = TRANSFORM_MODE_90;
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p_vout->p_sys->b_rotation = 1;
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}
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else if( !strcmp( psz_method, "180" ) )
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{
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p_vout->p_sys->i_mode = TRANSFORM_MODE_180;
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p_vout->p_sys->b_rotation = 0;
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}
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else if( !strcmp( psz_method, "270" ) )
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{
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p_vout->p_sys->i_mode = TRANSFORM_MODE_270;
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p_vout->p_sys->b_rotation = 1;
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}
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else
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{
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msg_Err( p_vout, "no valid transform mode provided, using '90'" );
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p_vout->p_sys->i_mode = TRANSFORM_MODE_90;
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p_vout->p_sys->b_rotation = 1;
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}
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free( psz_method );
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}
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return VLC_SUCCESS;
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}
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/*****************************************************************************
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* Init: initialize Transform video thread output method
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*****************************************************************************/
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static int Init( vout_thread_t *p_vout )
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{
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int i_index;
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picture_t *p_pic;
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video_format_t fmt = {0};
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I_OUTPUTPICTURES = 0;
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/* Initialize the output structure */
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p_vout->output.i_chroma = p_vout->render.i_chroma;
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p_vout->output.i_width = p_vout->render.i_width;
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p_vout->output.i_height = p_vout->render.i_height;
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p_vout->output.i_aspect = p_vout->render.i_aspect;
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p_vout->fmt_out = p_vout->fmt_in;
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fmt = p_vout->fmt_out;
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/* Try to open the real video output */
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msg_Dbg( p_vout, "spawning the real video output" );
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if( p_vout->p_sys->b_rotation )
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{
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fmt.i_width = p_vout->fmt_out.i_height;
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fmt.i_visible_width = p_vout->fmt_out.i_visible_height;
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fmt.i_x_offset = p_vout->fmt_out.i_y_offset;
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fmt.i_height = p_vout->fmt_out.i_width;
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fmt.i_visible_height = p_vout->fmt_out.i_visible_width;
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fmt.i_y_offset = p_vout->fmt_out.i_x_offset;
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fmt.i_aspect = VOUT_ASPECT_FACTOR *
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(uint64_t)VOUT_ASPECT_FACTOR / fmt.i_aspect;
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fmt.i_sar_num = p_vout->fmt_out.i_sar_den;
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fmt.i_sar_den = p_vout->fmt_out.i_sar_num;
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}
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p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
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/* Everything failed */
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if( p_vout->p_sys->p_vout == NULL )
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{
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msg_Err( p_vout, "cannot open vout, aborting" );
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return VLC_EGENERIC;
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}
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ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
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ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
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ADD_PARENT_CALLBACKS( SendEventsToChild );
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return VLC_SUCCESS;
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}
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/*****************************************************************************
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* End: terminate Transform video thread output method
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*****************************************************************************/
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static void End( vout_thread_t *p_vout )
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{
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int i_index;
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/* Free the fake output buffers we allocated */
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for( i_index = I_OUTPUTPICTURES ; i_index ; )
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{
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i_index--;
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free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
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}
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}
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/*****************************************************************************
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* Destroy: destroy Transform video thread output method
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*****************************************************************************
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* Terminate an output method created by TransformCreateOutputMethod
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*****************************************************************************/
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static void Destroy( vlc_object_t *p_this )
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{
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vout_thread_t *p_vout = (vout_thread_t *)p_this;
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if( p_vout->p_sys->p_vout )
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{
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DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
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vlc_object_detach( p_vout->p_sys->p_vout );
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vout_Destroy( p_vout->p_sys->p_vout );
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}
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DEL_PARENT_CALLBACKS( SendEventsToChild );
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free( p_vout->p_sys );
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}
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/*****************************************************************************
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* Render: displays previously rendered output
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*****************************************************************************
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* This function send the currently rendered image to Transform image, waits
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* until it is displayed and switch the two rendering buffers, preparing next
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* frame.
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*****************************************************************************/
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static void Render( vout_thread_t *p_vout, picture_t *p_pic )
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{
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picture_t *p_outpic;
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int i_index;
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/* This is a new frame. Get a structure from the video_output. */
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while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
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== NULL )
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{
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if( p_vout->b_die || p_vout->b_error )
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{
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return;
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}
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msleep( VOUT_OUTMEM_SLEEP );
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}
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vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
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vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
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switch( p_vout->p_sys->i_mode )
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{
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case TRANSFORM_MODE_90:
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for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
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{
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int i_pitch = p_pic->p[i_index].i_pitch;
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uint8_t *p_in = p_pic->p[i_index].p_pixels;
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uint8_t *p_out = p_outpic->p[i_index].p_pixels;
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uint8_t *p_out_end = p_out +
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p_outpic->p[i_index].i_visible_lines *
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p_outpic->p[i_index].i_pitch;
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for( ; p_out < p_out_end ; )
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{
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uint8_t *p_line_end;
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p_out_end -= p_outpic->p[i_index].i_pitch
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- p_outpic->p[i_index].i_visible_pitch;
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p_line_end = p_in + p_pic->p[i_index].i_visible_lines *
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i_pitch;
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for( ; p_in < p_line_end ; )
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{
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p_line_end -= i_pitch;
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*(--p_out_end) = *p_line_end;
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}
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p_in++;
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}
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}
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break;
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case TRANSFORM_MODE_180:
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for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
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{
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uint8_t *p_in = p_pic->p[i_index].p_pixels;
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uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
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* p_pic->p[i_index].i_pitch;
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uint8_t *p_out = p_outpic->p[i_index].p_pixels;
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for( ; p_in < p_in_end ; )
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{
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uint8_t *p_line_start = p_in_end
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- p_pic->p[i_index].i_pitch;
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p_in_end -= p_pic->p[i_index].i_pitch
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- p_pic->p[i_index].i_visible_pitch;
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for( ; p_line_start < p_in_end ; )
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{
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*p_out++ = *(--p_in_end);
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}
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p_out += p_outpic->p[i_index].i_pitch
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- p_outpic->p[i_index].i_visible_pitch;
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}
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}
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break;
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case TRANSFORM_MODE_270:
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for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
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{
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int i_pitch = p_pic->p[i_index].i_pitch;
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uint8_t *p_in = p_pic->p[i_index].p_pixels;
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uint8_t *p_out = p_outpic->p[i_index].p_pixels;
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uint8_t *p_out_end = p_out +
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p_outpic->p[i_index].i_visible_lines *
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p_outpic->p[i_index].i_pitch;
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for( ; p_out < p_out_end ; )
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{
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uint8_t *p_in_end;
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p_in_end = p_in + p_pic->p[i_index].i_visible_lines *
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i_pitch;
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for( ; p_in < p_in_end ; )
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{
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p_in_end -= i_pitch;
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*p_out++ = *p_in_end;
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}
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p_out += p_outpic->p[i_index].i_pitch
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- p_outpic->p[i_index].i_visible_pitch;
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p_in++;
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}
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}
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break;
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case TRANSFORM_MODE_HFLIP:
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for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
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{
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uint8_t *p_in = p_pic->p[i_index].p_pixels;
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uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
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* p_pic->p[i_index].i_pitch;
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uint8_t *p_out = p_outpic->p[i_index].p_pixels;
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for( ; p_in < p_in_end ; )
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{
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p_in_end -= p_pic->p[i_index].i_pitch;
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p_vout->p_vlc->pf_memcpy( p_out, p_in_end,
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p_pic->p[i_index].i_visible_pitch );
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p_out += p_pic->p[i_index].i_pitch;
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}
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}
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break;
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case TRANSFORM_MODE_VFLIP:
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for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
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{
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uint8_t *p_in = p_pic->p[i_index].p_pixels;
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uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
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* p_pic->p[i_index].i_pitch;
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uint8_t *p_out = p_outpic->p[i_index].p_pixels;
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for( ; p_in < p_in_end ; )
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{
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uint8_t *p_line_end = p_in
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+ p_pic->p[i_index].i_visible_pitch;
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for( ; p_in < p_line_end ; )
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{
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*p_out++ = *(--p_line_end);
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}
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p_in += p_pic->p[i_index].i_pitch;
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}
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}
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break;
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default:
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break;
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}
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vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
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vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
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}
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/*****************************************************************************
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* SendEvents: forward mouse and keyboard events to the parent p_vout
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*****************************************************************************/
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static int SendEvents( vlc_object_t *p_this, char const *psz_var,
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vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
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{
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vout_thread_t *p_vout = (vout_thread_t *)_p_vout;
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vlc_value_t sentval = newval;
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/* Translate the mouse coordinates */
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if( !strcmp( psz_var, "mouse-x" ) )
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{
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switch( p_vout->p_sys->i_mode )
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{
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case TRANSFORM_MODE_270:
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sentval.i_int = p_vout->p_sys->p_vout->output.i_width
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- sentval.i_int;
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case TRANSFORM_MODE_90:
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var_Set( p_vout, "mouse-y", sentval );
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return VLC_SUCCESS;
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case TRANSFORM_MODE_180:
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case TRANSFORM_MODE_HFLIP:
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sentval.i_int = p_vout->p_sys->p_vout->output.i_width
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- sentval.i_int;
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break;
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case TRANSFORM_MODE_VFLIP:
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default:
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break;
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}
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}
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else if( !strcmp( psz_var, "mouse-y" ) )
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{
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switch( p_vout->p_sys->i_mode )
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{
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case TRANSFORM_MODE_90:
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sentval.i_int = p_vout->p_sys->p_vout->output.i_height
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- sentval.i_int;
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case TRANSFORM_MODE_270:
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var_Set( p_vout, "mouse-x", sentval );
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return VLC_SUCCESS;
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|
|
case TRANSFORM_MODE_180:
|
|
case TRANSFORM_MODE_VFLIP:
|
|
sentval.i_int = p_vout->p_sys->p_vout->output.i_height
|
|
- sentval.i_int;
|
|
break;
|
|
|
|
case TRANSFORM_MODE_HFLIP:
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
var_Set( p_vout, psz_var, sentval );
|
|
|
|
return VLC_SUCCESS;
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* SendEventsToChild: forward events to the child/children vout
|
|
*****************************************************************************/
|
|
static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
|
|
vlc_value_t oldval, vlc_value_t newval, void *p_data )
|
|
{
|
|
vout_thread_t *p_vout = (vout_thread_t *)p_this;
|
|
var_Set( p_vout->p_sys->p_vout, psz_var, newval );
|
|
return VLC_SUCCESS;
|
|
}
|