[vlc-devel] [PATCH 1/3] VHS: VHS style video filter
Vianney Boyer
vlcvboyer at gmail.com
Fri Jul 26 19:56:18 CEST 2013
Hi,
You'll find below and in 2 additional patches the vhs video filter
modified as per your comments.
It has to be applied after freeze patch and oldmovie patch set
Regards
Vianney
---
modules/video_filter/vhs.c | 540
+++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 540 insertions(+)
create mode 100644 modules/video_filter/vhs.c
diff --git a/modules/video_filter/vhs.c b/modules/video_filter/vhs.c
new file mode 100644
index 0000000..cd1c450
--- /dev/null
+++ b/modules/video_filter/vhs.c
@@ -0,0 +1,540 @@
+/*****************************************************************************
+ * vhs.c : VHS effect video filter
+
*****************************************************************************
+ * Copyright (C) 2013 Vianney Boyer
+ * $Id$
+ *
+ * Authors: Vianney Boyer <vlcvboyer -at- gmail -dot- com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser 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_common.h>
+#include <vlc_plugin.h>
+#include <vlc_filter.h>
+#include <vlc_rand.h>
+#include <vlc_mtime.h>
+
+#include "filter_picture.h"
+
+#ifndef TIME_UNIT_PER_S
+# define TIME_UNIT_PER_S ( ((int64_t) 1) << 32 )
+#endif
+
+static inline int64_t MOD(int64_t a, int64_t b) {
+ return ( ( a % b ) + b ) % b; }
+
+#define MAX_BLUE_RED_LINES 100
+
+typedef struct {
+ int32_t i_offset;
+ uint16_t i_intensity;
+ bool b_blue_red;
+ uint64_t i_stop_trigger;
+} blue_red_line_t;
+
+struct filter_sys_t {
+
+ /* general data */
+ bool b_init;
+ int32_t i_planes;
+ int32_t *i_height; /* note: each plane may have different dimensions */
+ int32_t *i_width;
+ int32_t *i_visible_pitch;
+ uint64_t i_start_time;
+ uint64_t i_last_time;
+ uint64_t i_cur_time;
+
+ /* sliding & offset effect */
+ int32_t i_phase_speed;
+ int32_t i_phase_ofs;
+ int32_t i_offset_ofs;
+ int32_t i_sliding_ofs;
+ int32_t i_sliding_speed;
+ uint64_t i_offset_trigger;
+ uint64_t i_sliding_trigger;
+ uint64_t i_sliding_stop_trig;
+ bool i_sliding_type_duplicate;
+
+ /* blue red lines effect */
+ uint64_t i_BR_line_trigger;
+ blue_red_line_t *p_BR_lines[MAX_BLUE_RED_LINES];
+
+};
+
+/*****************************************************************************
+ * Prototypes
+
*****************************************************************************/
+
+picture_t *Filter( filter_t *, picture_t * );
+
+int vhs_allocate_data( filter_t *, picture_t * );
+void vhs_free_allocated_data( filter_t * );
+
+int vhs_blue_red_line_effect( filter_t *, picture_t * );
+void vhs_blue_red_dots_effect( filter_t *, picture_t * );
+int vhs_sliding_effect( filter_t *, picture_t * );
+
+int vhs_sliding_effect_apply( filter_t *, picture_t * );
+
+/*****************************************************************************
+ * Module descriptor
+
*****************************************************************************/
+
+int Open ( vlc_object_t * );
+void Close( vlc_object_t * );
+
+vlc_module_begin()
+ set_description( N_("VHS movie effect video filter") )
+ set_shortname( N_("VHS movie" ) )
+ set_capability( "video filter2", 0 )
+ set_category( CAT_VIDEO )
+ set_subcategory( SUBCAT_VIDEO_VFILTER )
+
+ set_callbacks( Open, Close )
+vlc_module_end()
+
+/**
+ * Open the filter
+ */
+int Open( vlc_object_t *p_this )
+{
+ filter_t *p_filter = (filter_t*)p_this;
+ filter_sys_t *p_sys;
+
+ /* Assert video in match with video out */
+ if( !es_format_IsSimilar( &p_filter->fmt_in, &p_filter->fmt_out ) ) {
+ msg_Err( p_filter, "Input and output format does not match" );
+ return VLC_EGENERIC;
+ }
+
+ /* Reject 0 bpp and unsupported chroma */
+ const vlc_fourcc_t fourcc = p_filter->fmt_in.video.i_chroma;
+ const vlc_chroma_description_t *p_chroma =
+ vlc_fourcc_GetChromaDescription( p_filter->fmt_in.video.i_chroma );
+ if( !p_chroma || p_chroma->pixel_size == 0
+ || p_chroma->plane_count < 3 || p_chroma->pixel_size > 1
+ || !vlc_fourcc_IsYUV( fourcc ) )
+ {
+ msg_Err( p_filter, "Unsupported chroma (%4.4s)", (char*)&fourcc );
+ return VLC_EGENERIC;
+ }
+
+ /* Allocate structure */
+ p_filter->p_sys = p_sys = calloc(1, sizeof(*p_sys) );
+ if( unlikely( !p_sys ) )
+ return VLC_ENOMEM;
+
+ /* init data */
+ p_filter->pf_video_filter = Filter;
+ p_sys->i_start_time = p_sys->i_cur_time = p_sys->i_last_time =
NTPtime64();
+
+ return VLC_SUCCESS;
+}
+
+/**
+ * Close the filter
+ */
+void Close( vlc_object_t *p_this ) {
+ filter_t *p_filter = (filter_t*)p_this;
+ filter_sys_t *p_sys = p_filter->p_sys;
+
+ /* Free allocated memory */
+ vhs_free_allocated_data( p_filter );
+ free( p_sys );
+}
+
+/**
+ * Filter a picture
+ */
+picture_t *Filter( filter_t *p_filter, picture_t *p_pic_in ) {
+ if( unlikely( !p_pic_in || !p_filter) )
+ return NULL;
+
+ filter_sys_t *p_sys = p_filter->p_sys;
+
+ picture_t *p_pic_out = filter_NewPicture( p_filter );
+ if( unlikely( !p_pic_out ) ) {
+ picture_Release( p_pic_in );
+ return NULL;
+ }
+
+ /*
+ * manage time
+ */
+ p_sys->i_last_time = p_sys->i_cur_time;
+ p_sys->i_cur_time = NTPtime64();
+
+ /*
+ * allocate data
+ */
+ if ( unlikely( !p_sys->b_init ) )
+ if ( unlikely( vhs_allocate_data( p_filter, p_pic_in ) !=
VLC_SUCCESS ) ) {
+ picture_Release( p_pic_in );
+ return NULL;
+ }
+ p_sys->b_init = true;
+
+ /*
+ * preset output pic: raw copy src to dst
+ */
+ picture_CopyPixels(p_pic_out, p_pic_in);
+
+ /*
+ * apply effects on picture
+ */
+ if ( unlikely( vhs_blue_red_line_effect( p_filter, p_pic_out ) !=
VLC_SUCCESS ) )
+ return CopyInfoAndRelease( p_pic_out, p_pic_in );
+
+ if ( unlikely( vhs_sliding_effect(p_filter, p_pic_out ) !=
VLC_SUCCESS ) )
+ return CopyInfoAndRelease( p_pic_out, p_pic_in );
+
+ vhs_blue_red_dots_effect( p_filter, p_pic_out );
+
+ return CopyInfoAndRelease( p_pic_out, p_pic_in );
+}
+
+/*
+ * Allocate data
+ */
+int vhs_allocate_data( filter_t *p_filter, picture_t *p_pic_in ) {
+ filter_sys_t *p_sys = p_filter->p_sys;
+
+ vhs_free_allocated_data( p_filter );
+
+ /*
+ * take into account different characteristics for each plane
+ */
+ p_sys->i_planes = p_pic_in->i_planes;
+ p_sys->i_height = calloc( p_sys->i_planes, sizeof(int32_t) );
+ p_sys->i_width = calloc( p_sys->i_planes, sizeof(int32_t) );
+ p_sys->i_visible_pitch = calloc( p_sys->i_planes, sizeof(int32_t) );
+
+ if( unlikely( !p_sys->i_height || !p_sys->i_width ||
!p_sys->i_visible_pitch ) ) {
+ vhs_free_allocated_data( p_filter );
+ return VLC_ENOMEM;
+ }
+
+ for ( int32_t i_p = 0; i_p < p_sys->i_planes; i_p++) {
+ p_sys->i_visible_pitch [i_p] = (int)
p_pic_in->p[i_p].i_visible_pitch;
+ p_sys->i_height[i_p] = (int) p_pic_in->p[i_p].i_visible_lines;
+ p_sys->i_width [i_p] = (int) p_pic_in->p[i_p].i_visible_pitch /
p_pic_in->p[i_p].i_pixel_pitch;
+ }
+ return VLC_SUCCESS;
+}
+
+/**
+ * Free allocated data
+ */
+void vhs_free_allocated_data( filter_t *p_filter ) {
+ filter_sys_t *p_sys = p_filter->p_sys;
+
+ for ( uint32_t i_b = 0; i_b < MAX_BLUE_RED_LINES; i_b++ )
+ FREENULL( p_sys->p_BR_lines[i_b] );
+
+ p_sys->i_planes = 0;
+ FREENULL( p_sys->i_height );
+ FREENULL( p_sys->i_width );
+ FREENULL( p_sys->i_visible_pitch );
+}
+
+
+/**
+ * Horizontal blue or red lines random management and effect
+ */
+int vhs_blue_red_line_effect( filter_t *p_filter, picture_t *p_pic_out ) {
+ filter_sys_t *p_sys = p_filter->p_sys;
+
+#define BR_LINES_GENERATOR_PERIOD ( TIME_UNIT_PER_S * 50 )
+#define BR_LINES_DURATION ( TIME_UNIT_PER_S * 1/50 )
+
+ /* generate new blue or red lines */
+ if ( p_sys->i_BR_line_trigger <= p_sys->i_cur_time ) {
+ for ( uint32_t i_b = 0; i_b < MAX_BLUE_RED_LINES; i_b++ )
+ if (p_sys->p_BR_lines[i_b] == NULL) {
+ /* allocate data */
+ p_sys->p_BR_lines[i_b] = calloc( 1,
sizeof(blue_red_line_t) );
+ if ( unlikely( !p_sys->p_BR_lines[i_b] ) )
+ return VLC_ENOMEM;
+
+ /* set random parameters */
+ p_sys->p_BR_lines[i_b]->i_offset = (unsigned)vlc_mrand48()
+ % __MAX( 1,
p_sys->i_height[Y_PLANE] - 10 )
+ + 5;
+
+ p_sys->p_BR_lines[i_b]->b_blue_red =
(unsigned)vlc_mrand48() & 0x01;
+
+ p_sys->p_BR_lines[i_b]->i_stop_trigger = p_sys->i_cur_time
+ +
(uint64_t)vlc_mrand48() % BR_LINES_DURATION
+ +
BR_LINES_DURATION / 2;
+
+ break;
+ }
+ p_sys->i_BR_line_trigger = p_sys->i_cur_time
+ + (uint64_t)vlc_mrand48() %
BR_LINES_GENERATOR_PERIOD
+ + BR_LINES_GENERATOR_PERIOD / 2;
+ }
+
+
+ /* manage and apply current blue/red lines */
+ for ( uint8_t i_b = 0; i_b < MAX_BLUE_RED_LINES; i_b++ )
+ if ( p_sys->p_BR_lines[i_b] ) {
+ /* remove outdated ones */
+ if ( p_sys->p_BR_lines[i_b]->i_stop_trigger <=
p_sys->i_cur_time ) {
+ FREENULL( p_sys->p_BR_lines[i_b] );
+ continue;
+ }
+
+ /* otherwise apply */
+ for ( int32_t i_p=0; i_p < p_sys->i_planes; i_p++ ) {
+ uint32_t i_pix_ofs = p_sys->p_BR_lines[i_b]->i_offset
+ * p_pic_out->p[i_p].i_visible_lines
+ / p_sys->i_height[Y_PLANE]
+ * p_pic_out->p[i_p].i_pitch;
+
+ switch ( i_p ) {
+ case Y_PLANE:
+ memset( &p_pic_out->p[i_p].p_pixels[i_pix_ofs], 127,
+ p_pic_out->p[i_p].i_visible_pitch);
+ break;
+ case U_PLANE:
+ memset( &p_pic_out->p[i_p].p_pixels[i_pix_ofs],
+ (p_sys->p_BR_lines[i_b]->b_blue_red?255:0),
+ p_pic_out->p[i_p].i_visible_pitch);
+ break;
+ case V_PLANE:
+ memset( &p_pic_out->p[i_p].p_pixels[i_pix_ofs],
+ (p_sys->p_BR_lines[i_b]->b_blue_red?0:255),
+ p_pic_out->p[i_p].i_visible_pitch);
+ break;
+ }
+
+ }
+ }
+ return VLC_SUCCESS;
+}
+
+/**
+ * insert randomly blue and red dots on the picture
+ */
+void vhs_blue_red_dots_effect( filter_t *p_filter, picture_t *p_pic_out ) {
+#define BR_DOTS_RATIO 10000
+
+ filter_sys_t *p_sys = p_filter->p_sys;
+
+ for ( int32_t i_dots = 0;
+ i_dots < p_sys->i_width[Y_PLANE] * p_sys->i_height[Y_PLANE] /
BR_DOTS_RATIO;
+ i_dots++) {
+
+ uint32_t i_length = (unsigned)vlc_mrand48()
+ % __MAX( 1, p_sys->i_width[Y_PLANE] / 30 ) + 1;
+
+ uint16_t i_x = (unsigned)vlc_mrand48()
+ % __MAX( 1, p_sys->i_width[Y_PLANE] - i_length );
+ uint16_t i_y = (unsigned)vlc_mrand48() % p_sys->i_height[Y_PLANE];
+ bool b_color = ( ( (unsigned)vlc_mrand48() % 2 ) == 0);
+
+ for ( int32_t i_p = 0; i_p < p_sys->i_planes; i_p++ ) {
+ uint32_t i_pix_ofs = i_y
+ * p_pic_out->p[i_p].i_visible_lines
+ / p_sys->i_height[Y_PLANE]
+ * p_pic_out->p[i_p].i_pitch
+ + i_x
+ * p_pic_out->p[i_p].i_pixel_pitch;
+
+ uint32_t i_length_in_plane = i_length
+ * p_pic_out->p[i_p].i_visible_pitch
+ /
p_pic_out->p[Y_PLANE].i_visible_pitch;
+
+ switch ( i_p ) {
+ case Y_PLANE:
+ memset( &p_pic_out->p[i_p].p_pixels[i_pix_ofs], 127,
+ i_length_in_plane );
+ break;
+ case U_PLANE:
+ memset( &p_pic_out->p[i_p].p_pixels[i_pix_ofs],
+ (b_color?255:0),
+ i_length_in_plane );
+ break;
+ case V_PLANE:
+ memset( &p_pic_out->p[i_p].p_pixels[i_pix_ofs],
+ (b_color?0:255),
+ i_length_in_plane );
+ break;
+ }
+ }
+ }
+}
+
+/**
+* sliding effects
+*/
+int vhs_sliding_effect( filter_t *p_filter, picture_t *p_pic_out ) {
+ filter_sys_t *p_sys = p_filter->p_sys;
+
+ /**
+ * one shot offset section
+ */
+
+#define OFFSET_AVERAGE_PERIOD (10 * TIME_UNIT_PER_S)
+
+ /* start trigger to be (re)initialized */
+ if ( p_sys->i_offset_trigger == 0
+ || p_sys->i_sliding_speed != 0 ) { /* do not mix sliding and
offset */
+
+ /* random trigger for offset effect */
+ p_sys->i_offset_trigger = p_sys->i_cur_time
+ + ((uint64_t) vlc_mrand48() ) %
OFFSET_AVERAGE_PERIOD
+ + OFFSET_AVERAGE_PERIOD / 2;
+ p_sys->i_offset_ofs = 0;
+ } else if (p_sys->i_offset_trigger <= p_sys->i_cur_time) {
+ /* trigger for offset effect occurs */
+ p_sys->i_offset_trigger = 0;
+ p_sys->i_offset_ofs = (uint32_t)vlc_mrand48()
+ % p_sys->i_height[Y_PLANE];
+ }
+ else
+ p_sys->i_offset_ofs = 0;
+
+
+ /**
+ * phase section
+ */
+
+#define MAX_PHASE_OFS (p_sys->i_height[Y_PLANE]*100/15)
+
+ p_sys->i_phase_speed += MOD( (int32_t)vlc_mrand48(), 3) - 1;
+ p_sys->i_phase_ofs += p_sys->i_phase_speed;
+ p_sys->i_phase_ofs = VLC_CLIP( p_sys->i_phase_ofs,
-MAX_PHASE_OFS, +MAX_PHASE_OFS);
+ if ( abs( p_sys->i_phase_ofs ) >= MAX_PHASE_OFS )
+ p_sys->i_phase_speed = 0;
+
+
+ /**
+ * sliding section
+ */
+
+#define SLIDING_AVERAGE_PERIOD (20 * TIME_UNIT_PER_S)
+#define SLIDING_AVERAGE_DURATION ( 3 * TIME_UNIT_PER_S)
+
+ /* start trigger to be (re)initialized */
+ if ( ( p_sys->i_sliding_stop_trig == 0 ) &&
+ ( p_sys->i_sliding_trigger == 0 ) &&
+ ( p_sys->i_sliding_speed == 0 ) ) {
+
+ /* random trigger which enable sliding effect */
+ p_sys->i_sliding_trigger = p_sys->i_cur_time
+ + (uint64_t)vlc_mrand48() %
SLIDING_AVERAGE_PERIOD
+ + SLIDING_AVERAGE_PERIOD / 2;
+ }
+
+ /* start trigger just occurs */
+ else if ( ( p_sys->i_sliding_stop_trig == 0 ) &&
+ ( p_sys->i_sliding_trigger <= p_sys->i_cur_time ) &&
+ ( p_sys->i_sliding_speed == 0 ) ) {
+
+ /* init sliding parameters */
+ p_sys->i_sliding_trigger = 0;
+ p_sys->i_sliding_stop_trig = p_sys->i_cur_time
+ + (uint64_t)vlc_mrand48() %
SLIDING_AVERAGE_DURATION
+ + SLIDING_AVERAGE_DURATION / 2;
+ p_sys->i_sliding_ofs = 0;
+ /* note: sliding speed unit = image per 100 s */
+ p_sys->i_sliding_speed = MOD( (int32_t)vlc_mrand48(), 1001 ) - 500;
+ p_sys->i_sliding_type_duplicate = (unsigned)vlc_mrand48() & 0x01;
+ }
+
+ /* stop trigger disabling sliding effect occurs */
+ else if ( ( p_sys->i_sliding_stop_trig <= p_sys->i_cur_time )
+ && ( p_sys->i_sliding_trigger == 0 ) ) {
+
+ /* first increase speed to ensure we will stop sliding on plain
pict */
+ if ( abs( p_sys->i_sliding_speed ) < 5 )
+ p_sys->i_sliding_speed += 1;
+
+ /* check if offset is close to 0 and then ready to stop */
+ if ( abs( p_sys->i_sliding_ofs ) < abs( p_sys->i_sliding_speed
+ * p_sys->i_height[Y_PLANE]
+ * ( p_sys->i_cur_time - p_sys->i_last_time ) /
TIME_UNIT_PER_S )
+ || abs( p_sys->i_sliding_ofs ) < p_sys->i_height[Y_PLANE]
* 100 / 20 ) {
+
+ /* reset sliding parameters */
+ p_sys->i_sliding_ofs = p_sys->i_sliding_speed = 0;
+ p_sys->i_sliding_trigger = p_sys->i_sliding_stop_trig = 0;
+ p_sys->i_sliding_type_duplicate = false;
+ }
+ }
+
+ /* update offset */
+ p_sys->i_sliding_ofs = MOD( p_sys->i_sliding_ofs
+ + p_sys->i_sliding_speed *
p_sys->i_height[Y_PLANE]
+ * ( p_sys->i_cur_time - p_sys->i_last_time)
+ / TIME_UNIT_PER_S,
+ p_sys->i_height[Y_PLANE] * 100 );
+
+ return vhs_sliding_effect_apply( p_filter, p_pic_out );
+}
+
+/**
+* apply both sliding and offset effect
+*/
+int vhs_sliding_effect_apply( filter_t *p_filter, picture_t *p_pic_out )
+{
+ filter_sys_t *p_sys = p_filter->p_sys;
+
+ for ( uint8_t i_p = 0; i_p < p_pic_out->i_planes; i_p++ ) {
+ /* first allocate temporary buffer for swap operation */
+ uint8_t *p_temp_buf;
+ if ( !p_sys->i_sliding_type_duplicate ) {
+ p_temp_buf= calloc( p_pic_out->p[i_p].i_lines
+ * p_pic_out->p[i_p].i_pitch,
sizeof(uint8_t) );
+ if ( unlikely( !p_temp_buf ) )
+ return VLC_ENOMEM;
+ memcpy( p_temp_buf, p_pic_out->p[i_p].p_pixels,
+ p_pic_out->p[i_p].i_lines *
p_pic_out->p[i_p].i_pitch );
+ }
+ else
+ p_temp_buf = p_pic_out->p[i_p].p_pixels;
+
+ /* copy lines to output_pic */
+ for ( int32_t i_y = 0; i_y < p_pic_out->p[i_p].i_visible_lines;
i_y++ )
+ {
+ int32_t i_ofs = p_sys->i_offset_ofs + p_sys->i_sliding_ofs;
+
+ if ( ( p_sys->i_sliding_speed == 0 ) ||
!p_sys->i_sliding_type_duplicate )
+ i_ofs += p_sys->i_phase_ofs;
+
+ i_ofs = MOD( i_ofs / 100, p_sys->i_height[Y_PLANE] );
+ i_ofs *= p_pic_out->p[i_p].i_visible_lines;
+ i_ofs /= p_sys->i_height[Y_PLANE];
+
+ memcpy( &p_pic_out->p[i_p].p_pixels[ i_y *
p_pic_out->p[i_p].i_pitch ],
+ &p_temp_buf[ ( ( i_y + i_ofs ) %
p_pic_out->p[i_p].i_visible_lines ) * p_pic_out->p[i_p].i_pitch ],
+ p_pic_out->p[i_p].i_visible_pitch );
+ }
+ if ( !p_sys->i_sliding_type_duplicate )
+ free(p_temp_buf);
+ }
+
+ return VLC_SUCCESS;
+}
--
1.8.1.2
Le 25/07/2013 13:41, Jean-Baptiste Kempf a écrit :
> On 25 Jul, Vianney Boyer wrote :
>> New video filter showing the video like an old VHS tape
> Mostly the same remarks as the previous ones.
>
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