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vlc/modules/video_chroma/swscale.c

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/*****************************************************************************
* swscale.c: scaling and chroma conversion using libswscale
*****************************************************************************
* Copyright (C) 1999-2008 VLC authors and VideoLAN
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
* Gildas Bazin <gbazin@videolan.org>
*
* 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 <assert.h>
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_filter.h>
#include <vlc_picture.h>
#include <vlc_chroma_probe.h>
#include <vlc_cpu.h>
#include <libswscale/swscale.h>
#include <libswscale/version.h>
#ifdef __APPLE__
# include <TargetConditionals.h>
#endif
#include "../codec/avcodec/chroma.h" // Chroma Avutil <-> VLC conversion
/*****************************************************************************
* Module descriptor
*****************************************************************************/
static int OpenScaler( filter_t * );
static void CloseScaler( filter_t * );
#define SCALEMODE_TEXT N_("Scaling mode")
#define SCALEMODE_LONGTEXT NULL
static const int pi_mode_values[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
static const char *const ppsz_mode_descriptions[] =
{ N_("Fast bilinear"), N_("Bilinear"), N_("Bicubic (good quality)"),
N_("Experimental"), N_("Nearest neighbor (bad quality)"),
N_("Area"), N_("Luma bicubic / chroma bilinear"), N_("Gauss"),
N_("SincR"), N_("Lanczos"), N_("Bicubic spline") };
static void ProbeChroma(vlc_chroma_conv_vec *vec)
{
#define COST_FACTOR 1
size_t count;
const struct vlc_chroma_ffmpeg *table = GetVlcChromaFfmpegTable(&count);
assert(table != NULL && count > 0);
for (size_t i = 0; i < count; i++)
{
vlc_fourcc_t cur_chroma = table[i].i_chroma;
enum AVPixelFormat cur_avpf = table[i].i_chroma_id;
bool cur_supported_input = sws_isSupportedInput(cur_avpf);
bool cur_supported_output = sws_isSupportedOutput(cur_avpf);
if (!cur_supported_input && !cur_supported_output)
continue;
for (size_t j = i + 1; j < count; j++)
{
vlc_fourcc_t next_chroma = table[j].i_chroma;
if (next_chroma == cur_chroma)
continue;
enum AVPixelFormat next_avpf = table[j].i_chroma_id;
bool next_supported_input = sws_isSupportedInput(next_avpf);
bool next_supported_output = sws_isSupportedOutput(next_avpf);
if (!next_supported_input && !next_supported_output)
continue;
if (cur_supported_input && cur_supported_output
&& next_supported_input && next_supported_output)
{
/* Likely case: add in <-> out two way conversion */
vlc_chroma_conv_add(vec, COST_FACTOR, cur_chroma, next_chroma,
true);
}
else
{
if (cur_supported_input && next_supported_output)
vlc_chroma_conv_add(vec, COST_FACTOR, cur_chroma, next_chroma,
false);
else if (cur_supported_output && next_supported_input)
vlc_chroma_conv_add(vec, COST_FACTOR, next_chroma, cur_chroma,
false);
}
}
}
}
vlc_module_begin ()
set_description( N_("Video scaling filter") )
set_shortname( N_("Swscale" ) )
set_subcategory( SUBCAT_VIDEO_VFILTER )
set_callback_video_converter( OpenScaler, 150 )
add_integer( "swscale-mode", 2, SCALEMODE_TEXT, SCALEMODE_LONGTEXT )
change_integer_list( pi_mode_values, ppsz_mode_descriptions )
add_submodule()
set_callback_chroma_conv_probe(ProbeChroma)
vlc_module_end ()
/* Version checking */
/****************************************************************************
* Local prototypes
****************************************************************************/
/**
* Internal swscale filter structure.
*/
typedef struct
{
SwsFilter *p_filter;
int i_sws_flags;
video_format_t fmt_in;
video_format_t fmt_out;
const vlc_chroma_description_t *desc_in;
const vlc_chroma_description_t *desc_out;
struct SwsContext *ctx;
struct SwsContext *ctxA;
picture_t *p_src_a;
picture_t *p_dst_a;
int i_extend_factor;
picture_t *p_src_e;
picture_t *p_dst_e;
bool b_add_a;
bool b_copy;
bool b_swap_uvi;
bool b_swap_uvo;
} filter_sys_t;
static picture_t *Filter( filter_t *, picture_t * );
static int Init( filter_t * );
static void Clean( filter_t * );
typedef struct
{
enum AVPixelFormat i_fmti;
enum AVPixelFormat i_fmto;
bool b_has_a;
bool b_add_a;
int i_sws_flags;
bool b_copy;
bool b_swap_uvi;
bool b_swap_uvo;
} ScalerConfiguration;
static int GetParameters( ScalerConfiguration *,
const video_format_t *p_fmti,
const video_format_t *p_fmto,
int i_sws_flags_default );
/* SwScaler point resize quality seems really bad, let our scale module do it
* (change it to true to try) */
#define ALLOW_YUVP (false)
/* SwScaler does not like too small picture */
#define MINIMUM_WIDTH (32)
/* XXX is it always 3 even for BIG_ENDIAN (blend.c seems to think so) ? */
#define OFFSET_A (3)
static const struct vlc_filter_operations filter_ops = {
.filter_video = Filter, .close = CloseScaler,
};
static int GetSwsColorspace( const video_format_t *format )
{
/* We currently map bt2020, bt709 and bt601, all other are unspecified */
switch( format->space )
{
case COLOR_SPACE_BT709:
return SWS_CS_ITU709;
case COLOR_SPACE_BT601:
return SWS_CS_ITU601;
case COLOR_SPACE_BT2020:
return SWS_CS_BT2020;
default:
return SWS_CS_DEFAULT;
}
}
static const char* GetColorspaceName( video_color_space_t space )
{
switch( space )
{
case COLOR_SPACE_BT601:
return "BT601";
case COLOR_SPACE_BT709:
return "BT709";
case COLOR_SPACE_BT2020:
return "BT2020";
default:
return "Undefined";
}
}
static void SetColorspace( filter_sys_t *p_sys )
{
int input_range, output_range;
int brightness, contrast, saturation;
const int *input_table, *output_table;
sws_getColorspaceDetails( p_sys->ctx, (int **)&input_table, &input_range,
(int **)&output_table, &output_range,
&brightness, &contrast, &saturation );
input_range = p_sys->fmt_in.color_range == COLOR_RANGE_FULL;
output_range = p_sys->fmt_out.color_range == COLOR_RANGE_FULL;
input_table = sws_getCoefficients( GetSwsColorspace( &p_sys->fmt_in ) );
output_table = sws_getCoefficients( GetSwsColorspace( &p_sys->fmt_out ) );
sws_setColorspaceDetails( p_sys->ctx, input_table, input_range,
output_table, output_range,
brightness, contrast, saturation );
}
/*****************************************************************************
* OpenScaler: probe the filter and return score
*****************************************************************************/
static int OpenScaler( filter_t *p_filter )
{
filter_sys_t *p_sys;
int i_sws_mode;
if( GetParameters( NULL,
&p_filter->fmt_in.video,
&p_filter->fmt_out.video, 0 ) )
return VLC_EGENERIC;
/* Allocate the memory needed to store the decoder's structure */
if( ( p_filter->p_sys = p_sys = calloc(1, sizeof(filter_sys_t)) ) == NULL )
return VLC_ENOMEM;
/* */
i_sws_mode = var_CreateGetInteger( p_filter, "swscale-mode" );
switch( i_sws_mode )
{
case 0: p_sys->i_sws_flags = SWS_FAST_BILINEAR; break;
case 1: p_sys->i_sws_flags = SWS_BILINEAR; break;
case 2: p_sys->i_sws_flags = SWS_BICUBIC; break;
case 3: p_sys->i_sws_flags = SWS_X; break;
case 4: p_sys->i_sws_flags = SWS_POINT; break;
case 5: p_sys->i_sws_flags = SWS_AREA; break;
case 6: p_sys->i_sws_flags = SWS_BICUBLIN; break;
case 7: p_sys->i_sws_flags = SWS_GAUSS; break;
case 8: p_sys->i_sws_flags = SWS_SINC; break;
case 9: p_sys->i_sws_flags = SWS_LANCZOS; break;
case 10: p_sys->i_sws_flags = SWS_SPLINE; break;
default: p_sys->i_sws_flags = SWS_BICUBIC; i_sws_mode = 2; break;
}
/* Misc init */
memset( &p_sys->fmt_in, 0, sizeof(p_sys->fmt_in) );
memset( &p_sys->fmt_out, 0, sizeof(p_sys->fmt_out) );
if( Init( p_filter ) )
{
if( p_sys->p_filter )
sws_freeFilter( p_sys->p_filter );
free( p_sys );
return VLC_EGENERIC;
}
/* */
p_filter->ops = &filter_ops;
msg_Dbg( p_filter, "%ix%i (%ix%i) chroma: %4.4s colorspace: %s -> %ix%i (%ix%i) chroma: %4.4s colorspace: %s with scaling using %s",
p_filter->fmt_in.video.i_visible_width, p_filter->fmt_in.video.i_visible_height,
p_filter->fmt_in.video.i_width, p_filter->fmt_in.video.i_height,
(char *)&p_filter->fmt_in.video.i_chroma, GetColorspaceName( p_filter->fmt_in.video.space ),
p_filter->fmt_out.video.i_visible_width, p_filter->fmt_out.video.i_visible_height,
p_filter->fmt_out.video.i_width, p_filter->fmt_out.video.i_height,
(char *)&p_filter->fmt_out.video.i_chroma, GetColorspaceName( p_filter->fmt_out.video.space ),
ppsz_mode_descriptions[i_sws_mode] );
return VLC_SUCCESS;
}
/*****************************************************************************
* CloseFilter: clean up the filter
*****************************************************************************/
static void CloseScaler( filter_t *p_filter )
{
filter_sys_t *p_sys = p_filter->p_sys;
Clean( p_filter );
if( p_sys->p_filter )
sws_freeFilter( p_sys->p_filter );
free( p_sys );
}
/*****************************************************************************
* Helpers
*****************************************************************************/
static void FixParameters( enum AVPixelFormat *pi_fmt, bool *pb_has_a, vlc_fourcc_t fmt )
{
switch( fmt )
{
case VLC_CODEC_YUV422A:
*pi_fmt = AV_PIX_FMT_YUVA422P;
*pb_has_a = true;
break;
case VLC_CODEC_YUV420A:
*pi_fmt = AV_PIX_FMT_YUVA420P;
*pb_has_a = true;
break;
case VLC_CODEC_YUVA:
*pi_fmt = AV_PIX_FMT_YUV444P;
*pb_has_a = true;
break;
case VLC_CODEC_RGBA:
*pi_fmt = AV_PIX_FMT_RGBA;
*pb_has_a = true;
break;
case VLC_CODEC_ARGB:
*pi_fmt = AV_PIX_FMT_ARGB;
*pb_has_a = true;
break;
case VLC_CODEC_BGRA:
*pi_fmt = AV_PIX_FMT_BGRA;
*pb_has_a = true;
break;
case VLC_CODEC_ABGR:
*pi_fmt = AV_PIX_FMT_ABGR;
*pb_has_a = true;
break;
default:
break;
}
}
static int GetParameters( ScalerConfiguration *p_cfg,
const video_format_t *p_fmti,
const video_format_t *p_fmto,
int i_sws_flags_default )
{
enum AVPixelFormat i_fmti;
enum AVPixelFormat i_fmto;
bool b_has_ai = false;
bool b_has_ao = false;
int i_sws_flags = i_sws_flags_default;
bool b_swap_uvi = false;
bool b_swap_uvo = false;
i_fmti = FindFfmpegChroma( p_fmti->i_chroma, &b_swap_uvi );
i_fmto = FindFfmpegChroma( p_fmto->i_chroma, &b_swap_uvo );
if( p_fmti->i_chroma == p_fmto->i_chroma )
{
if( p_fmti->i_chroma == VLC_CODEC_YUVP && ALLOW_YUVP )
{
i_fmti = i_fmto = AV_PIX_FMT_GRAY8;
i_sws_flags = SWS_POINT;
}
}
FixParameters( &i_fmti, &b_has_ai, p_fmti->i_chroma );
FixParameters( &i_fmto, &b_has_ao, p_fmto->i_chroma );
#if !defined (__ANDROID__) && !defined(TARGET_OS_IPHONE)
/* FIXME TODO removed when ffmpeg is fixed
* Without SWS_ACCURATE_RND the quality is really bad for some conversions */
switch( i_fmto )
{
case AV_PIX_FMT_ARGB:
case AV_PIX_FMT_RGBA:
case AV_PIX_FMT_ABGR:
i_sws_flags |= SWS_ACCURATE_RND;
break;
default:
break;
}
#endif
if( p_cfg )
{
p_cfg->i_fmti = i_fmti;
p_cfg->i_fmto = i_fmto;
p_cfg->b_has_a = b_has_ai && b_has_ao;
p_cfg->b_add_a = (!b_has_ai) && b_has_ao;
p_cfg->b_copy = i_fmti == i_fmto &&
p_fmti->i_visible_width == p_fmto->i_visible_width &&
p_fmti->i_visible_height == p_fmto->i_visible_height;
p_cfg->b_swap_uvi = b_swap_uvi;
p_cfg->b_swap_uvo = b_swap_uvo;
p_cfg->i_sws_flags = i_sws_flags;
}
if( i_fmti < 0 || i_fmto < 0 )
return VLC_EGENERIC;
return VLC_SUCCESS;
}
static int Init( filter_t *p_filter )
{
filter_sys_t *p_sys = p_filter->p_sys;
const video_format_t *p_fmti = &p_filter->fmt_in.video;
video_format_t *p_fmto = &p_filter->fmt_out.video;
if( p_fmti->orientation != p_fmto->orientation )
return VLC_EGENERIC;
if( video_format_IsSimilar( p_fmti, &p_sys->fmt_in ) &&
video_format_IsSimilar( p_fmto, &p_sys->fmt_out ) &&
p_sys->ctx )
{
return VLC_SUCCESS;
}
Clean( p_filter );
/* Init with new parameters */
ScalerConfiguration cfg;
if( GetParameters( &cfg, p_fmti, p_fmto, p_sys->i_sws_flags ) )
{
msg_Err( p_filter, "format not supported '%4.4s' %ux%u -> '%4.4s' %ux%u",
(const char *)&p_fmti->i_chroma, p_fmti->i_visible_width, p_fmti->i_visible_height,
(const char *)&p_fmto->i_chroma, p_fmto->i_visible_width, p_fmto->i_visible_height );
return VLC_EGENERIC;
}
if( p_fmti->i_visible_width == 0 || p_fmti->i_visible_height == 0 ||
p_fmto->i_visible_width == 0 || p_fmto->i_visible_height == 0 )
{
msg_Err( p_filter, "invalid scaling: %ix%i -> %ix%i",
p_fmti->i_visible_width, p_fmti->i_visible_height,
p_fmto->i_visible_width, p_fmto->i_visible_height);
return VLC_EGENERIC;
}
p_sys->desc_in = vlc_fourcc_GetChromaDescription( p_fmti->i_chroma );
p_sys->desc_out = vlc_fourcc_GetChromaDescription( p_fmto->i_chroma );
if( p_sys->desc_in == NULL || p_sys->desc_out == NULL )
return VLC_EGENERIC;
if( p_sys->desc_in->plane_count == 0 || p_sys->desc_out->plane_count == 0 )
return VLC_EGENERIC;
/* swscale does not like too small width */
p_sys->i_extend_factor = 1;
while( __MIN( p_fmti->i_visible_width, p_fmto->i_visible_width ) * p_sys->i_extend_factor < MINIMUM_WIDTH)
p_sys->i_extend_factor++;
const unsigned i_fmti_visible_width = p_fmti->i_visible_width * p_sys->i_extend_factor;
const unsigned i_fmto_visible_width = p_fmto->i_visible_width * p_sys->i_extend_factor;
for( int n = 0; n < (cfg.b_has_a ? 2 : 1); n++ )
{
const int i_fmti = n == 0 ? cfg.i_fmti : AV_PIX_FMT_GRAY8;
const int i_fmto = n == 0 ? cfg.i_fmto : AV_PIX_FMT_GRAY8;
struct SwsContext *ctx;
ctx = sws_getContext( i_fmti_visible_width, p_fmti->i_visible_height, i_fmti,
i_fmto_visible_width, p_fmto->i_visible_height, i_fmto,
cfg.i_sws_flags,
p_sys->p_filter, NULL, 0 );
if( n == 0 )
p_sys->ctx = ctx;
else
p_sys->ctxA = ctx;
}
if( p_sys->ctxA )
{
p_sys->p_src_a = picture_New( VLC_CODEC_GREY, i_fmti_visible_width, p_fmti->i_visible_height, 0, 1 );
p_sys->p_dst_a = picture_New( VLC_CODEC_GREY, i_fmto_visible_width, p_fmto->i_visible_height, 0, 1 );
}
if( p_sys->i_extend_factor != 1 )
{
p_sys->p_src_e = picture_New( p_fmti->i_chroma, i_fmti_visible_width, p_fmti->i_visible_height, 0, 1 );
p_sys->p_dst_e = picture_New( p_fmto->i_chroma, i_fmto_visible_width, p_fmto->i_visible_height, 0, 1 );
if( p_sys->p_src_e )
memset( p_sys->p_src_e->p[0].p_pixels, 0, p_sys->p_src_e->p[0].i_pitch * p_sys->p_src_e->p[0].i_lines );
if( p_sys->p_dst_e )
memset( p_sys->p_dst_e->p[0].p_pixels, 0, p_sys->p_dst_e->p[0].i_pitch * p_sys->p_dst_e->p[0].i_lines );
}
if( !p_sys->ctx ||
( cfg.b_has_a && ( !p_sys->ctxA || !p_sys->p_src_a || !p_sys->p_dst_a ) ) ||
( p_sys->i_extend_factor != 1 && ( !p_sys->p_src_e || !p_sys->p_dst_e ) ) )
{
msg_Err( p_filter, "could not init SwScaler and/or allocate memory" );
Clean( p_filter );
return VLC_EGENERIC;
}
if (p_filter->b_allow_fmt_out_change)
{
/*
* If the transformation is not homothetic we must modify the
* aspect ratio of the output format in order to have the
* output picture displayed correctly and not stretched
* horizontally or vertically.
* WARNING: this is a hack, ideally this should not be needed
* and the vout should update its video format instead.
*/
unsigned i_sar_num = p_fmti->i_sar_num * p_fmti->i_visible_width;
unsigned i_sar_den = p_fmti->i_sar_den * p_fmto->i_visible_width;
vlc_ureduce(&i_sar_num, &i_sar_den, i_sar_num, i_sar_den, 65536);
i_sar_num *= p_fmto->i_visible_height;
i_sar_den *= p_fmti->i_visible_height;
vlc_ureduce(&i_sar_num, &i_sar_den, i_sar_num, i_sar_den, 65536);
p_fmto->i_sar_num = i_sar_num;
p_fmto->i_sar_den = i_sar_den;
}
p_sys->b_add_a = cfg.b_add_a;
p_sys->b_copy = cfg.b_copy;
p_sys->fmt_in = *p_fmti;
p_sys->fmt_out = *p_fmto;
p_sys->b_swap_uvi = cfg.b_swap_uvi;
p_sys->b_swap_uvo = cfg.b_swap_uvo;
SetColorspace( p_sys );
return VLC_SUCCESS;
}
static void Clean( filter_t *p_filter )
{
filter_sys_t *p_sys = p_filter->p_sys;
if( p_sys->p_src_e )
picture_Release( p_sys->p_src_e );
if( p_sys->p_dst_e )
picture_Release( p_sys->p_dst_e );
if( p_sys->p_src_a )
picture_Release( p_sys->p_src_a );
if( p_sys->p_dst_a )
picture_Release( p_sys->p_dst_a );
if( p_sys->ctxA )
sws_freeContext( p_sys->ctxA );
if( p_sys->ctx )
sws_freeContext( p_sys->ctx );
/* We have to set it to null has we call be called again :( */
p_sys->ctx = NULL;
p_sys->ctxA = NULL;
p_sys->p_src_a = NULL;
p_sys->p_dst_a = NULL;
p_sys->p_src_e = NULL;
p_sys->p_dst_e = NULL;
}
static void GetPixels( uint8_t *pp_pixel[4], int pi_pitch[4],
const vlc_chroma_description_t *desc,
const video_format_t *fmt,
const picture_t *p_picture, unsigned planes,
bool b_swap_uv )
{
unsigned i = 0;
if( planes > (unsigned)p_picture->i_planes )
planes = p_picture->i_planes;
assert( !b_swap_uv || planes >= 3 );
for( ; i < planes; i++ )
{
const plane_t *p = p_picture->p + i;
if( b_swap_uv && (i == 1 || i== 2) )
p = p_picture->p + 3 - i;
pp_pixel[i] = p->p_pixels
+ (((fmt->i_x_offset * desc->p[i].w.num) / desc->p[i].w.den)
* p->i_pixel_pitch)
+ (((fmt->i_y_offset * desc->p[i].h.num) / desc->p[i].h.den)
* p->i_pitch);
pi_pitch[i] = p->i_pitch;
}
for( ; i < 4; i++ )
{
pp_pixel[i] = NULL;
pi_pitch[i] = 0;
}
}
static void ExtractA( picture_t *p_dst, const picture_t *restrict p_src,
unsigned offset )
{
plane_t *d = &p_dst->p[0];
const plane_t *s = &p_src->p[0];
for( unsigned y = 0; y < p_dst->format.i_height; y++ )
for( unsigned x = 0; x < p_dst->format.i_width; x++ )
d->p_pixels[y*d->i_pitch+x] = s->p_pixels[y*s->i_pitch+4*x+offset];
}
static void InjectA( picture_t *p_dst, const picture_t *restrict p_src,
unsigned offset )
{
plane_t *d = &p_dst->p[0];
const plane_t *s = &p_src->p[0];
for( unsigned y = 0; y < p_src->format.i_height; y++ )
for( unsigned x = 0; x < p_src->format.i_width; x++ )
d->p_pixels[y*d->i_pitch+4*x+offset] = s->p_pixels[y*s->i_pitch+x];
}
static void FillA( plane_t *d, unsigned i_offset )
{
for( int y = 0; y < d->i_visible_lines; y++ )
for( int x = 0; x < d->i_visible_pitch; x += d->i_pixel_pitch )
d->p_pixels[y*d->i_pitch+x+i_offset] = 0xff;
}
static void CopyPad( picture_t *p_dst, const picture_t *p_src )
{
picture_Copy( p_dst, p_src );
for( int n = 0; n < p_dst->i_planes; n++ )
{
const plane_t *s = &p_src->p[n];
plane_t *d = &p_dst->p[n];
for( int y = 0; y < s->i_lines && y < d->i_lines; y++ )
{
for( int x = s->i_visible_pitch; x < d->i_visible_pitch; x += s->i_pixel_pitch )
memcpy( &d->p_pixels[y*d->i_pitch + x], &d->p_pixels[y*d->i_pitch + s->i_visible_pitch - s->i_pixel_pitch], s->i_pixel_pitch );
}
}
}
static void SwapUV( picture_t *p_dst, const picture_t *p_src )
{
picture_t tmp = *p_src;
tmp.p[1] = p_src->p[2];
tmp.p[2] = p_src->p[1];
picture_CopyPixels( p_dst, &tmp );
}
static void Convert( filter_t *p_filter, struct SwsContext *ctx,
picture_t *p_dst, picture_t *p_src, int i_height,
int i_plane_count, bool b_swap_uvi, bool b_swap_uvo )
{
filter_sys_t *p_sys = p_filter->p_sys;
uint8_t palette[AVPALETTE_SIZE];
uint8_t *src[4], *dst[4];
const uint8_t *csrc[4];
int src_stride[4], dst_stride[4];
GetPixels( src, src_stride, p_sys->desc_in, &p_filter->fmt_in.video,
p_src, i_plane_count, b_swap_uvi );
if( p_filter->fmt_in.video.i_chroma == VLC_CODEC_RGBP )
{
if( p_filter->fmt_in.video.p_palette )
{
const video_palette_t *p_palette = p_filter->fmt_in.video.p_palette;
static_assert(sizeof(p_palette->palette) == AVPALETTE_SIZE,
"Palette size mismatch between vlc and libavutil");
uint8_t *dstp = palette;
for(int i=0; i<p_palette->i_entries; i++)
{
// we want ARGB in host endianess from RGBA in byte order
#ifdef WORDS_BIGENDIAN
dstp[0] = p_palette->palette[i][3];
dstp[1] = p_palette->palette[i][0];
dstp[2] = p_palette->palette[i][1];
dstp[3] = p_palette->palette[i][2];
#else
dstp[0] = p_palette->palette[i][2];
dstp[1] = p_palette->palette[i][1];
dstp[2] = p_palette->palette[i][0];
dstp[3] = p_palette->palette[i][3];
#endif
dstp += sizeof(p_palette->palette[0]);
}
}
else
{
memset( &palette, 0, sizeof(palette) );
}
src[1] = palette;
src_stride[1] = 4;
}
GetPixels( dst, dst_stride, p_sys->desc_out, &p_filter->fmt_out.video,
p_dst, i_plane_count, b_swap_uvo );
for (size_t i = 0; i < ARRAY_SIZE(src); i++)
csrc[i] = src[i];
#if LIBSWSCALE_VERSION_INT >= ((0<<16)+(5<<8)+0)
sws_scale( ctx, csrc, src_stride, 0, i_height,
dst, dst_stride );
#else
sws_scale_ordered( ctx, csrc, src_stride, 0, i_height,
dst, dst_stride );
#endif
}
/****************************************************************************
* Filter: the whole thing
****************************************************************************
* This function is called just after the thread is launched.
****************************************************************************/
static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
{
filter_sys_t *p_sys = p_filter->p_sys;
const video_format_t *p_fmti = &p_filter->fmt_in.video;
const video_format_t *p_fmto = &p_filter->fmt_out.video;
picture_t *p_pic_dst;
/* Check if format properties changed */
if( Init( p_filter ) )
{
picture_Release( p_pic );
return NULL;
}
/* Request output picture */
p_pic_dst = filter_NewPicture( p_filter );
if( !p_pic_dst )
{
picture_Release( p_pic );
return NULL;
}
/* */
picture_t *p_src = p_pic;
picture_t *p_dst = p_pic_dst;
if( p_sys->i_extend_factor != 1 )
{
p_src = p_sys->p_src_e;
p_dst = p_sys->p_dst_e;
CopyPad( p_src, p_pic );
}
if( p_sys->b_copy && p_sys->b_swap_uvi == p_sys->b_swap_uvo )
picture_CopyPixels( p_dst, p_src );
else if( p_sys->b_copy )
SwapUV( p_dst, p_src );
else
{
/* Even if alpha is unused, swscale expects the pointer to be set */
const int n_planes = !p_sys->ctxA && (p_src->i_planes == 4 ||
p_dst->i_planes == 4) ? 4 : 3;
Convert( p_filter, p_sys->ctx, p_dst, p_src, p_fmti->i_visible_height,
n_planes, p_sys->b_swap_uvi, p_sys->b_swap_uvo );
}
if( p_sys->ctxA )
{
/* We extract the A plane to rescale it, and then we reinject it. */
if( p_fmti->i_chroma == VLC_CODEC_RGBA || p_fmti->i_chroma == VLC_CODEC_BGRA )
ExtractA( p_sys->p_src_a, p_src, OFFSET_A );
else if( p_fmti->i_chroma == VLC_CODEC_ARGB || p_fmti->i_chroma == VLC_CODEC_ABGR )
ExtractA( p_sys->p_src_a, p_src, 0 );
else
plane_CopyPixels( p_sys->p_src_a->p, p_src->p+A_PLANE );
Convert( p_filter, p_sys->ctxA, p_sys->p_dst_a, p_sys->p_src_a,
p_fmti->i_visible_height, 1, false, false );
if( p_fmto->i_chroma == VLC_CODEC_RGBA || p_fmto->i_chroma == VLC_CODEC_BGRA )
InjectA( p_dst, p_sys->p_dst_a, OFFSET_A );
else if( p_fmto->i_chroma == VLC_CODEC_ARGB || p_fmto->i_chroma == VLC_CODEC_ABGR )
InjectA( p_dst, p_sys->p_dst_a, 0 );
else
plane_CopyPixels( p_dst->p+A_PLANE, p_sys->p_dst_a->p );
}
else if( p_sys->b_add_a )
{
/* We inject a complete opaque alpha plane */
if( p_fmto->i_chroma == VLC_CODEC_RGBA || p_fmto->i_chroma == VLC_CODEC_BGRA )
FillA( &p_dst->p[0], OFFSET_A );
else if( p_fmto->i_chroma == VLC_CODEC_ARGB || p_fmto->i_chroma == VLC_CODEC_ABGR )
FillA( &p_dst->p[0], 0 );
else
FillA( &p_dst->p[A_PLANE], 0 );
}
if( p_sys->i_extend_factor != 1 )
{
picture_CopyPixels( p_pic_dst, p_dst );
}
picture_CopyProperties( p_pic_dst, p_pic );
picture_Release( p_pic );
return p_pic_dst;
}