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vlc/modules/video_filter/transform.c

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/*****************************************************************************
* transform.c : transform image module for vlc
*****************************************************************************
* Copyright (C) 2000-2006 the VideoLAN team
* $Id$
*
* 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., 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>
#include "filter_common.h"
#include "filter_picture.h"
#define TRANSFORM_MODE_HFLIP 1
#define TRANSFORM_MODE_VFLIP 2
#define TRANSFORM_MODE_90 3
#define TRANSFORM_MODE_180 4
#define TRANSFORM_MODE_270 5
/*****************************************************************************
* 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 void Render ( vout_thread_t *, picture_t * );
static void FilterPlanar( vout_thread_t *, const picture_t *, picture_t * );
static void FilterYUYV( vout_thread_t *, const picture_t *, picture_t * );
static int SendEvents( vlc_object_t *, char const *,
vlc_value_t, vlc_value_t, void * );
/*****************************************************************************
* Module descriptor
*****************************************************************************/
#define TYPE_TEXT N_("Transform type")
#define TYPE_LONGTEXT N_("One of '90', '180', '270', 'hflip' and 'vflip'")
static const char *type_list[] = { "90", "180", "270", "hflip", "vflip" };
static const char *type_list_text[] = { N_("Rotate by 90 degrees"),
N_("Rotate by 180 degrees"), N_("Rotate by 270 degrees"),
N_("Flip horizontally"), N_("Flip vertically") };
#define CFG_PREFIX "transform-"
vlc_module_begin();
set_description( _("Video transformation filter") );
set_shortname( _("Transformation"));
set_capability( "video filter", 0 );
set_category( CAT_VIDEO );
set_subcategory( SUBCAT_VIDEO_VFILTER );
add_string( CFG_PREFIX "type", "90", NULL,
TYPE_TEXT, TYPE_LONGTEXT, VLC_FALSE);
change_string_list( type_list, type_list_text, 0);
add_shortcut( "transform" );
set_callbacks( Create, Destroy );
vlc_module_end();
static const char *ppsz_filter_options[] = {
"type", NULL
};
/*****************************************************************************
* vout_sys_t: Transform video output method descriptor
*****************************************************************************
* This structure is part of the video output thread descriptor.
* It describes the Transform specific properties of an output thread.
*****************************************************************************/
struct vout_sys_t
{
int i_mode;
vlc_bool_t b_rotation;
vout_thread_t *p_vout;
void (*pf_filter)( vout_thread_t *, const picture_t *, picture_t * );
};
/*****************************************************************************
* Control: control facility for the vout (forwards to child vout)
*****************************************************************************/
static int Control( vout_thread_t *p_vout, int i_query, va_list args )
{
return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
}
/*****************************************************************************
* Create: allocates Transform video thread output method
*****************************************************************************
* This function allocates and initializes a Transform vout method.
*****************************************************************************/
static int Create( vlc_object_t *p_this )
{
vout_thread_t *p_vout = (vout_thread_t *)p_this;
char *psz_method;
/* Allocate structure */
p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
if( p_vout->p_sys == NULL )
{
msg_Err( p_vout, "out of memory" );
return VLC_ENOMEM;
}
p_vout->pf_init = Init;
p_vout->pf_end = End;
p_vout->pf_manage = NULL;
p_vout->pf_render = Render;
p_vout->pf_display = NULL;
p_vout->pf_control = Control;
config_ChainParse( p_vout, CFG_PREFIX, ppsz_filter_options,
p_vout->p_cfg );
/* Look what method was requested */
psz_method = var_CreateGetNonEmptyString( p_vout, "transform-type" );
switch( p_vout->fmt_in.i_chroma )
{
CASE_PLANAR_YUV
case VLC_FOURCC('G','R','E','Y'):
p_vout->p_sys->pf_filter = FilterPlanar;
break;
CASE_PACKED_YUV_422
p_vout->p_sys->pf_filter = FilterYUYV;
break;
default:
msg_Err( p_vout, "Unsupported chroma" );
free( p_vout->p_sys );
return VLC_EGENERIC;
}
if( psz_method == NULL )
{
msg_Err( p_vout, "configuration variable %s empty", "transform-type" );
msg_Err( p_vout, "no valid transform mode provided, using '90'" );
p_vout->p_sys->i_mode = TRANSFORM_MODE_90;
p_vout->p_sys->b_rotation = 1;
}
else
{
if( !strcmp( psz_method, "hflip" ) )
{
p_vout->p_sys->i_mode = TRANSFORM_MODE_HFLIP;
p_vout->p_sys->b_rotation = 0;
}
else if( !strcmp( psz_method, "vflip" ) )
{
p_vout->p_sys->i_mode = TRANSFORM_MODE_VFLIP;
p_vout->p_sys->b_rotation = 0;
}
else if( !strcmp( psz_method, "90" ) )
{
p_vout->p_sys->i_mode = TRANSFORM_MODE_90;
p_vout->p_sys->b_rotation = 1;
}
else if( !strcmp( psz_method, "180" ) )
{
p_vout->p_sys->i_mode = TRANSFORM_MODE_180;
p_vout->p_sys->b_rotation = 0;
}
else if( !strcmp( psz_method, "270" ) )
{
p_vout->p_sys->i_mode = TRANSFORM_MODE_270;
p_vout->p_sys->b_rotation = 1;
}
else
{
msg_Err( p_vout, "no valid transform mode provided, using '90'" );
p_vout->p_sys->i_mode = TRANSFORM_MODE_90;
p_vout->p_sys->b_rotation = 1;
}
free( psz_method );
}
return VLC_SUCCESS;
}
/*****************************************************************************
* Init: initialize Transform video thread output method
*****************************************************************************/
static int Init( vout_thread_t *p_vout )
{
int i_index;
picture_t *p_pic;
video_format_t fmt;
I_OUTPUTPICTURES = 0;
memset( &fmt, 0, sizeof(video_format_t) );
/* 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;
p_vout->fmt_out = p_vout->fmt_in;
fmt = p_vout->fmt_out;
/* Try to open the real video output */
msg_Dbg( p_vout, "spawning the real video output" );
if( p_vout->p_sys->b_rotation )
{
fmt.i_width = p_vout->fmt_out.i_height;
fmt.i_visible_width = p_vout->fmt_out.i_visible_height;
fmt.i_x_offset = p_vout->fmt_out.i_y_offset;
fmt.i_height = p_vout->fmt_out.i_width;
fmt.i_visible_height = p_vout->fmt_out.i_visible_width;
fmt.i_y_offset = p_vout->fmt_out.i_x_offset;
fmt.i_aspect = VOUT_ASPECT_FACTOR *
(uint64_t)VOUT_ASPECT_FACTOR / fmt.i_aspect;
fmt.i_sar_num = p_vout->fmt_out.i_sar_den;
fmt.i_sar_den = p_vout->fmt_out.i_sar_num;
}
p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
/* Everything failed */
if( p_vout->p_sys->p_vout == NULL )
{
msg_Err( p_vout, "cannot open vout, aborting" );
return VLC_EGENERIC;
}
ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
ADD_PARENT_CALLBACKS( SendEventsToChild );
return VLC_SUCCESS;
}
/*****************************************************************************
* End: terminate Transform video thread output method
*****************************************************************************/
static void 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 );
}
}
/*****************************************************************************
* Destroy: destroy Transform video thread output method
*****************************************************************************
* Terminate an output method created by TransformCreateOutputMethod
*****************************************************************************/
static void Destroy( vlc_object_t *p_this )
{
vout_thread_t *p_vout = (vout_thread_t *)p_this;
if( p_vout->p_sys->p_vout )
{
DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
vlc_object_detach( p_vout->p_sys->p_vout );
vout_Destroy( p_vout->p_sys->p_vout );
}
DEL_PARENT_CALLBACKS( SendEventsToChild );
free( p_vout->p_sys );
}
/*****************************************************************************
* Render: displays previously rendered output
*****************************************************************************
* This function send the currently rendered image to Transform image, waits
* until it is displayed and switch the two rendering buffers, preparing next
* frame.
*****************************************************************************/
static void Render( vout_thread_t *p_vout, picture_t *p_pic )
{
picture_t *p_outpic;
/* This is a new frame. 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 );
}
vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
p_vout->p_sys->pf_filter( p_vout, p_pic, p_outpic );
vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
}
/*****************************************************************************
* SendEvents: forward mouse and keyboard events to the parent p_vout
*****************************************************************************/
static int SendEvents( vlc_object_t *p_this, char const *psz_var,
vlc_value_t oldval, vlc_value_t newval, void *_p_vout )
{
VLC_UNUSED(p_this); VLC_UNUSED(oldval);
vout_thread_t *p_vout = (vout_thread_t *)_p_vout;
vlc_value_t sentval = newval;
/* Translate the mouse coordinates */
if( !strcmp( psz_var, "mouse-x" ) )
{
switch( p_vout->p_sys->i_mode )
{
case TRANSFORM_MODE_270:
sentval.i_int = p_vout->p_sys->p_vout->output.i_width
- sentval.i_int;
case TRANSFORM_MODE_90:
var_Set( p_vout, "mouse-y", sentval );
return VLC_SUCCESS;
case TRANSFORM_MODE_180:
case TRANSFORM_MODE_HFLIP:
sentval.i_int = p_vout->p_sys->p_vout->output.i_width
- sentval.i_int;
break;
case TRANSFORM_MODE_VFLIP:
default:
break;
}
}
else if( !strcmp( psz_var, "mouse-y" ) )
{
switch( p_vout->p_sys->i_mode )
{
case TRANSFORM_MODE_90:
sentval.i_int = p_vout->p_sys->p_vout->output.i_height
- sentval.i_int;
case TRANSFORM_MODE_270:
var_Set( p_vout, "mouse-x", sentval );
return VLC_SUCCESS;
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 )
{
VLC_UNUSED(p_data); VLC_UNUSED(oldval);
vout_thread_t *p_vout = (vout_thread_t *)p_this;
var_Set( p_vout->p_sys->p_vout, psz_var, newval );
return VLC_SUCCESS;
}
static void FilterPlanar( vout_thread_t *p_vout,
const picture_t *p_pic, picture_t *p_outpic )
{
int i_index;
switch( p_vout->p_sys->i_mode )
{
case TRANSFORM_MODE_90:
for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
{
int i_pitch = p_pic->p[i_index].i_pitch;
uint8_t *p_in = p_pic->p[i_index].p_pixels;
uint8_t *p_out = p_outpic->p[i_index].p_pixels;
uint8_t *p_out_end = p_out +
p_outpic->p[i_index].i_visible_lines *
p_outpic->p[i_index].i_pitch;
for( ; p_out < p_out_end ; )
{
uint8_t *p_line_end;
p_out_end -= p_outpic->p[i_index].i_pitch
- p_outpic->p[i_index].i_visible_pitch;
p_line_end = p_in + p_pic->p[i_index].i_visible_lines *
i_pitch;
for( ; p_in < p_line_end ; )
{
p_line_end -= i_pitch;
*(--p_out_end) = *p_line_end;
}
p_in++;
}
}
break;
case TRANSFORM_MODE_180:
for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
{
uint8_t *p_in = p_pic->p[i_index].p_pixels;
uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
* p_pic->p[i_index].i_pitch;
uint8_t *p_out = p_outpic->p[i_index].p_pixels;
for( ; p_in < p_in_end ; )
{
uint8_t *p_line_start = p_in_end
- p_pic->p[i_index].i_pitch;
p_in_end -= p_pic->p[i_index].i_pitch
- p_pic->p[i_index].i_visible_pitch;
for( ; p_line_start < p_in_end ; )
{
*p_out++ = *(--p_in_end);
}
p_out += p_outpic->p[i_index].i_pitch
- p_outpic->p[i_index].i_visible_pitch;
}
}
break;
case TRANSFORM_MODE_270:
for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
{
int i_pitch = p_pic->p[i_index].i_pitch;
uint8_t *p_in = p_pic->p[i_index].p_pixels;
uint8_t *p_out = p_outpic->p[i_index].p_pixels;
uint8_t *p_out_end = p_out +
p_outpic->p[i_index].i_visible_lines *
p_outpic->p[i_index].i_pitch;
for( ; p_out < p_out_end ; )
{
uint8_t *p_in_end;
p_in_end = p_in + p_pic->p[i_index].i_visible_lines *
i_pitch;
for( ; p_in < p_in_end ; )
{
p_in_end -= i_pitch;
*p_out++ = *p_in_end;
}
p_out += p_outpic->p[i_index].i_pitch
- p_outpic->p[i_index].i_visible_pitch;
p_in++;
}
}
break;
case TRANSFORM_MODE_HFLIP:
for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
{
uint8_t *p_in = p_pic->p[i_index].p_pixels;
uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
* p_pic->p[i_index].i_pitch;
uint8_t *p_out = p_outpic->p[i_index].p_pixels;
for( ; p_in < p_in_end ; )
{
p_in_end -= p_pic->p[i_index].i_pitch;
p_vout->p_libvlc->pf_memcpy( p_out, p_in_end,
p_pic->p[i_index].i_visible_pitch );
p_out += p_pic->p[i_index].i_pitch;
}
}
break;
case TRANSFORM_MODE_VFLIP:
for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
{
uint8_t *p_in = p_pic->p[i_index].p_pixels;
uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
* p_pic->p[i_index].i_pitch;
uint8_t *p_out = p_outpic->p[i_index].p_pixels;
for( ; p_in < p_in_end ; )
{
uint8_t *p_line_end = p_in
+ p_pic->p[i_index].i_visible_pitch;
for( ; p_in < p_line_end ; )
{
*p_out++ = *(--p_line_end);
}
p_in += p_pic->p[i_index].i_pitch;
}
}
break;
default:
break;
}
}
static void FilterYUYV( vout_thread_t *p_vout,
const picture_t *p_pic, picture_t *p_outpic )
{
int i_index;
int i_y_offset, i_u_offset, i_v_offset;
if( GetPackedYuvOffsets( p_pic->format.i_chroma, &i_y_offset,
&i_u_offset, &i_v_offset ) != VLC_SUCCESS )
return;
switch( p_vout->p_sys->i_mode )
{
case TRANSFORM_MODE_90:
for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
{
int i_pitch = p_pic->p[i_index].i_pitch;
uint8_t *p_in = p_pic->p[i_index].p_pixels;
uint8_t *p_out = p_outpic->p[i_index].p_pixels;
uint8_t *p_out_end = p_out +
p_outpic->p[i_index].i_visible_lines *
p_outpic->p[i_index].i_pitch;
int i_offset = i_u_offset;
int i_offset2 = i_v_offset;
for( ; p_out < p_out_end ; )
{
uint8_t *p_line_end;
p_out_end -= p_outpic->p[i_index].i_pitch
- p_outpic->p[i_index].i_visible_pitch;
p_line_end = p_in + p_pic->p[i_index].i_visible_lines *
i_pitch;
for( ; p_in < p_line_end ; )
{
p_line_end -= i_pitch;
p_out_end -= 4;
p_out_end[i_y_offset+2] = p_line_end[i_y_offset];
p_out_end[i_u_offset] = p_line_end[i_offset];
p_line_end -= i_pitch;
p_out_end[i_y_offset] = p_line_end[i_y_offset];
p_out_end[i_v_offset] = p_line_end[i_offset2];
}
p_in += 2;
{
int a = i_offset;
i_offset = i_offset2;
i_offset2 = a;
}
}
}
break;
case TRANSFORM_MODE_180:
for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
{
uint8_t *p_in = p_pic->p[i_index].p_pixels;
uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
* p_pic->p[i_index].i_pitch;
uint8_t *p_out = p_outpic->p[i_index].p_pixels;
for( ; p_in < p_in_end ; )
{
uint8_t *p_line_start = p_in_end
- p_pic->p[i_index].i_pitch;
p_in_end -= p_pic->p[i_index].i_pitch
- p_pic->p[i_index].i_visible_pitch;
for( ; p_line_start < p_in_end ; )
{
p_in_end -= 4;
p_out[i_y_offset] = p_in_end[i_y_offset+2];
p_out[i_u_offset] = p_in_end[i_u_offset];
p_out[i_y_offset+2] = p_in_end[i_y_offset];
p_out[i_v_offset] = p_in_end[i_v_offset];
p_out += 4;
}
p_out += p_outpic->p[i_index].i_pitch
- p_outpic->p[i_index].i_visible_pitch;
}
}
break;
case TRANSFORM_MODE_270:
for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
{
int i_pitch = p_pic->p[i_index].i_pitch;
uint8_t *p_in = p_pic->p[i_index].p_pixels;
uint8_t *p_out = p_outpic->p[i_index].p_pixels;
uint8_t *p_out_end = p_out +
p_outpic->p[i_index].i_visible_lines *
p_outpic->p[i_index].i_pitch;
int i_offset = i_u_offset;
int i_offset2 = i_v_offset;
for( ; p_out < p_out_end ; )
{
uint8_t *p_in_end;
p_in_end = p_in
+ p_pic->p[i_index].i_visible_lines * i_pitch;
for( ; p_in < p_in_end ; )
{
p_in_end -= i_pitch;
p_out[i_y_offset] = p_in_end[i_y_offset];
p_out[i_u_offset] = p_in_end[i_offset];
p_in_end -= i_pitch;
p_out[i_y_offset+2] = p_in_end[i_y_offset];
p_out[i_v_offset] = p_in_end[i_offset2];
p_out += 4;
}
p_out += p_outpic->p[i_index].i_pitch
- p_outpic->p[i_index].i_visible_pitch;
p_in += 2;
{
int a = i_offset;
i_offset = i_offset2;
i_offset2 = a;
}
}
}
break;
case TRANSFORM_MODE_HFLIP:
for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
{
uint8_t *p_in = p_pic->p[i_index].p_pixels;
uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
* p_pic->p[i_index].i_pitch;
uint8_t *p_out = p_outpic->p[i_index].p_pixels;
for( ; p_in < p_in_end ; )
{
p_in_end -= p_pic->p[i_index].i_pitch;
p_vout->p_libvlc->pf_memcpy( p_out, p_in_end,
p_pic->p[i_index].i_visible_pitch );
p_out += p_pic->p[i_index].i_pitch;
}
}
break;
case TRANSFORM_MODE_VFLIP:
for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
{
uint8_t *p_in = p_pic->p[i_index].p_pixels;
uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
* p_pic->p[i_index].i_pitch;
uint8_t *p_out = p_outpic->p[i_index].p_pixels;
for( ; p_in < p_in_end ; )
{
uint8_t *p_line_end = p_in
+ p_pic->p[i_index].i_visible_pitch;
for( ; p_in < p_line_end ; )
{
p_line_end -= 4;
p_out[i_y_offset] = p_line_end[i_y_offset+2];
p_out[i_u_offset] = p_line_end[i_u_offset];
p_out[i_y_offset+2] = p_line_end[i_y_offset];
p_out[i_v_offset] = p_line_end[i_v_offset];
p_out += 4;
}
p_in += p_pic->p[i_index].i_pitch;
}
}
break;
default:
break;
}
}
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