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/*
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* Copyright ( c ) 2007 Bobby Bingham
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*
* This file is part of FFmpeg .
*
* FFmpeg 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 .
*
* FFmpeg 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 FFmpeg ; if not , write to the Free Software
* Foundation , Inc . , 51 Franklin Street , Fifth Floor , Boston , MA 02110 - 1301 USA
*/
/**
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* @ file
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* scale video filter
*/
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# include <stdio.h>
# include <string.h>
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# include "avfilter.h"
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# include "formats.h"
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# include "internal.h"
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# include "scale_eval.h"
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# include "video.h"
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# include "libavutil/avstring.h"
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# include "libavutil/eval.h"
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# include "libavutil/internal.h"
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# include "libavutil/mathematics.h"
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# include "libavutil/opt.h"
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# include "libavutil/parseutils.h"
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# include "libavutil/pixdesc.h"
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# include "libavutil/imgutils.h"
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# include "libavutil/avassert.h"
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# include "libswscale/swscale.h"
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static const char * const var_names [ ] = {
" in_w " , " iw " ,
" in_h " , " ih " ,
" out_w " , " ow " ,
" out_h " , " oh " ,
" a " ,
" sar " ,
" dar " ,
" hsub " ,
" vsub " ,
" ohsub " ,
" ovsub " ,
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" n " ,
" t " ,
" pos " ,
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" main_w " ,
" main_h " ,
" main_a " ,
" main_sar " ,
" main_dar " , " mdar " ,
" main_hsub " ,
" main_vsub " ,
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" main_n " ,
" main_t " ,
" main_pos " ,
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NULL
} ;
enum var_name {
VAR_IN_W , VAR_IW ,
VAR_IN_H , VAR_IH ,
VAR_OUT_W , VAR_OW ,
VAR_OUT_H , VAR_OH ,
VAR_A ,
VAR_SAR ,
VAR_DAR ,
VAR_HSUB ,
VAR_VSUB ,
VAR_OHSUB ,
VAR_OVSUB ,
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VAR_N ,
VAR_T ,
VAR_POS ,
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VAR_S2R_MAIN_W ,
VAR_S2R_MAIN_H ,
VAR_S2R_MAIN_A ,
VAR_S2R_MAIN_SAR ,
VAR_S2R_MAIN_DAR , VAR_S2R_MDAR ,
VAR_S2R_MAIN_HSUB ,
VAR_S2R_MAIN_VSUB ,
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VAR_S2R_MAIN_N ,
VAR_S2R_MAIN_T ,
VAR_S2R_MAIN_POS ,
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VARS_NB
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} ;
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enum EvalMode {
EVAL_MODE_INIT ,
EVAL_MODE_FRAME ,
EVAL_MODE_NB
} ;
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typedef struct ScaleContext {
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const AVClass * class ;
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struct SwsContext * sws ; ///< software scaler context
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struct SwsContext * isws [ 2 ] ; ///< software scaler context for interlaced material
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AVDictionary * opts ;
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/**
* New dimensions . Special values are :
* 0 = original width / height
* - 1 = keep original aspect
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* - N = try to keep aspect but make sure it is divisible by N
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*/
int w , h ;
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char * size_str ;
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unsigned int flags ; ///sws flags
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double param [ 2 ] ; // sws params
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int hsub , vsub ; ///< chroma subsampling
int slice_y ; ///< top of current output slice
int input_is_pal ; ///< set to 1 if the input format is paletted
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int output_is_pal ; ///< set to 1 if the output format is paletted
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int interlaced ;
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char * w_expr ; ///< width expression string
char * h_expr ; ///< height expression string
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AVExpr * w_pexpr ;
AVExpr * h_pexpr ;
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double var_values [ VARS_NB ] ;
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char * flags_str ;
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char * in_color_matrix ;
char * out_color_matrix ;
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int in_range ;
int out_range ;
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int out_h_chr_pos ;
int out_v_chr_pos ;
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int in_h_chr_pos ;
int in_v_chr_pos ;
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int force_original_aspect_ratio ;
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int force_divisible_by ;
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int nb_slices ;
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int eval_mode ; ///< expression evaluation mode
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} ScaleContext ;
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AVFilter ff_vf_scale2ref ;
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static int config_props ( AVFilterLink * outlink ) ;
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static int check_exprs ( AVFilterContext * ctx )
{
ScaleContext * scale = ctx - > priv ;
unsigned vars_w [ VARS_NB ] = { 0 } , vars_h [ VARS_NB ] = { 0 } ;
if ( ! scale - > w_pexpr & & ! scale - > h_pexpr )
return AVERROR ( EINVAL ) ;
if ( scale - > w_pexpr )
av_expr_count_vars ( scale - > w_pexpr , vars_w , VARS_NB ) ;
if ( scale - > h_pexpr )
av_expr_count_vars ( scale - > h_pexpr , vars_h , VARS_NB ) ;
if ( vars_w [ VAR_OUT_W ] | | vars_w [ VAR_OW ] ) {
av_log ( ctx , AV_LOG_ERROR , " Width expression cannot be self-referencing: '%s'. \n " , scale - > w_expr ) ;
return AVERROR ( EINVAL ) ;
}
if ( vars_h [ VAR_OUT_H ] | | vars_h [ VAR_OH ] ) {
av_log ( ctx , AV_LOG_ERROR , " Height expression cannot be self-referencing: '%s'. \n " , scale - > h_expr ) ;
return AVERROR ( EINVAL ) ;
}
if ( ( vars_w [ VAR_OUT_H ] | | vars_w [ VAR_OH ] ) & &
( vars_h [ VAR_OUT_W ] | | vars_h [ VAR_OW ] ) ) {
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av_log ( ctx , AV_LOG_WARNING , " Circular references detected for width '%s' and height '%s' - possibly invalid. \n " , scale - > w_expr , scale - > h_expr ) ;
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}
if ( ctx - > filter ! = & ff_vf_scale2ref & &
( vars_w [ VAR_S2R_MAIN_W ] | | vars_h [ VAR_S2R_MAIN_W ] | |
vars_w [ VAR_S2R_MAIN_H ] | | vars_h [ VAR_S2R_MAIN_H ] | |
vars_w [ VAR_S2R_MAIN_A ] | | vars_h [ VAR_S2R_MAIN_A ] | |
vars_w [ VAR_S2R_MAIN_SAR ] | | vars_h [ VAR_S2R_MAIN_SAR ] | |
vars_w [ VAR_S2R_MAIN_DAR ] | | vars_h [ VAR_S2R_MAIN_DAR ] | |
vars_w [ VAR_S2R_MDAR ] | | vars_h [ VAR_S2R_MDAR ] | |
vars_w [ VAR_S2R_MAIN_HSUB ] | | vars_h [ VAR_S2R_MAIN_HSUB ] | |
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vars_w [ VAR_S2R_MAIN_VSUB ] | | vars_h [ VAR_S2R_MAIN_VSUB ] | |
vars_w [ VAR_S2R_MAIN_N ] | | vars_h [ VAR_S2R_MAIN_N ] | |
vars_w [ VAR_S2R_MAIN_T ] | | vars_h [ VAR_S2R_MAIN_T ] | |
vars_w [ VAR_S2R_MAIN_POS ] | | vars_h [ VAR_S2R_MAIN_POS ] ) ) {
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av_log ( ctx , AV_LOG_ERROR , " Expressions with scale2ref variables are not valid in scale filter. \n " ) ;
return AVERROR ( EINVAL ) ;
}
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if ( scale - > eval_mode = = EVAL_MODE_INIT & &
( vars_w [ VAR_N ] | | vars_h [ VAR_N ] | |
vars_w [ VAR_T ] | | vars_h [ VAR_T ] | |
vars_w [ VAR_POS ] | | vars_h [ VAR_POS ] | |
vars_w [ VAR_S2R_MAIN_N ] | | vars_h [ VAR_S2R_MAIN_N ] | |
vars_w [ VAR_S2R_MAIN_T ] | | vars_h [ VAR_S2R_MAIN_T ] | |
vars_w [ VAR_S2R_MAIN_POS ] | | vars_h [ VAR_S2R_MAIN_POS ] ) ) {
av_log ( ctx , AV_LOG_ERROR , " Expressions with frame variables 'n', 't', 'pos' are not valid in init eval_mode. \n " ) ;
return AVERROR ( EINVAL ) ;
}
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return 0 ;
}
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static int scale_parse_expr ( AVFilterContext * ctx , char * str_expr , AVExpr * * pexpr_ptr , const char * var , const char * args )
{
ScaleContext * scale = ctx - > priv ;
int ret , is_inited = 0 ;
char * old_str_expr = NULL ;
AVExpr * old_pexpr = NULL ;
if ( str_expr ) {
old_str_expr = av_strdup ( str_expr ) ;
if ( ! old_str_expr )
return AVERROR ( ENOMEM ) ;
av_opt_set ( scale , var , args , 0 ) ;
}
if ( * pexpr_ptr ) {
old_pexpr = * pexpr_ptr ;
* pexpr_ptr = NULL ;
is_inited = 1 ;
}
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ret = av_expr_parse ( pexpr_ptr , args , var_names ,
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NULL , NULL , NULL , NULL , 0 , ctx ) ;
if ( ret < 0 ) {
av_log ( ctx , AV_LOG_ERROR , " Cannot parse expression for %s: '%s' \n " , var , args ) ;
goto revert ;
}
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ret = check_exprs ( ctx ) ;
if ( ret < 0 )
goto revert ;
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if ( is_inited & & ( ret = config_props ( ctx - > outputs [ 0 ] ) ) < 0 )
goto revert ;
av_expr_free ( old_pexpr ) ;
old_pexpr = NULL ;
av_freep ( & old_str_expr ) ;
return 0 ;
revert :
av_expr_free ( * pexpr_ptr ) ;
* pexpr_ptr = NULL ;
if ( old_str_expr ) {
av_opt_set ( scale , var , old_str_expr , 0 ) ;
av_free ( old_str_expr ) ;
}
if ( old_pexpr )
* pexpr_ptr = old_pexpr ;
return ret ;
}
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static av_cold int init_dict ( AVFilterContext * ctx , AVDictionary * * opts )
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{
ScaleContext * scale = ctx - > priv ;
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int ret ;
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if ( scale - > size_str & & ( scale - > w_expr | | scale - > h_expr ) ) {
av_log ( ctx , AV_LOG_ERROR ,
" Size and width/height expressions cannot be set at the same time. \n " ) ;
return AVERROR ( EINVAL ) ;
}
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if ( scale - > w_expr & & ! scale - > h_expr )
FFSWAP ( char * , scale - > w_expr , scale - > size_str ) ;
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if ( scale - > size_str ) {
char buf [ 32 ] ;
if ( ( ret = av_parse_video_size ( & scale - > w , & scale - > h , scale - > size_str ) ) < 0 ) {
av_log ( ctx , AV_LOG_ERROR ,
" Invalid size '%s' \n " , scale - > size_str ) ;
return ret ;
}
snprintf ( buf , sizeof ( buf ) - 1 , " %d " , scale - > w ) ;
av_opt_set ( scale , " w " , buf , 0 ) ;
snprintf ( buf , sizeof ( buf ) - 1 , " %d " , scale - > h ) ;
av_opt_set ( scale , " h " , buf , 0 ) ;
}
if ( ! scale - > w_expr )
av_opt_set ( scale , " w " , " iw " , 0 ) ;
if ( ! scale - > h_expr )
av_opt_set ( scale , " h " , " ih " , 0 ) ;
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ret = scale_parse_expr ( ctx , NULL , & scale - > w_pexpr , " width " , scale - > w_expr ) ;
if ( ret < 0 )
return ret ;
ret = scale_parse_expr ( ctx , NULL , & scale - > h_pexpr , " height " , scale - > h_expr ) ;
if ( ret < 0 )
return ret ;
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av_log ( ctx , AV_LOG_VERBOSE , " w:%s h:%s flags:'%s' interl:%d \n " ,
scale - > w_expr , scale - > h_expr , ( char * ) av_x_if_null ( scale - > flags_str , " " ) , scale - > interlaced ) ;
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scale - > flags = 0 ;
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if ( scale - > flags_str ) {
const AVClass * class = sws_get_class ( ) ;
const AVOption * o = av_opt_find ( & class , " sws_flags " , NULL , 0 ,
AV_OPT_SEARCH_FAKE_OBJ ) ;
int ret = av_opt_eval_flags ( & class , o , scale - > flags_str , & scale - > flags ) ;
if ( ret < 0 )
return ret ;
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}
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scale - > opts = * opts ;
* opts = NULL ;
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return 0 ;
}
static av_cold void uninit ( AVFilterContext * ctx )
{
ScaleContext * scale = ctx - > priv ;
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av_expr_free ( scale - > w_pexpr ) ;
av_expr_free ( scale - > h_pexpr ) ;
scale - > w_pexpr = scale - > h_pexpr = NULL ;
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sws_freeContext ( scale - > sws ) ;
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sws_freeContext ( scale - > isws [ 0 ] ) ;
sws_freeContext ( scale - > isws [ 1 ] ) ;
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scale - > sws = NULL ;
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av_dict_free ( & scale - > opts ) ;
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}
static int query_formats ( AVFilterContext * ctx )
{
AVFilterFormats * formats ;
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enum AVPixelFormat pix_fmt ;
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int ret ;
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if ( ctx - > inputs [ 0 ] ) {
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const AVPixFmtDescriptor * desc = NULL ;
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formats = NULL ;
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while ( ( desc = av_pix_fmt_desc_next ( desc ) ) ) {
pix_fmt = av_pix_fmt_desc_get_id ( desc ) ;
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if ( ( sws_isSupportedInput ( pix_fmt ) | |
sws_isSupportedEndiannessConversion ( pix_fmt ) )
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& & ( ret = ff_add_format ( & formats , pix_fmt ) ) < 0 ) {
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return ret ;
}
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}
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if ( ( ret = ff_formats_ref ( formats , & ctx - > inputs [ 0 ] - > out_formats ) ) < 0 )
return ret ;
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}
if ( ctx - > outputs [ 0 ] ) {
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const AVPixFmtDescriptor * desc = NULL ;
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formats = NULL ;
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while ( ( desc = av_pix_fmt_desc_next ( desc ) ) ) {
pix_fmt = av_pix_fmt_desc_get_id ( desc ) ;
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if ( ( sws_isSupportedOutput ( pix_fmt ) | | pix_fmt = = AV_PIX_FMT_PAL8 | |
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sws_isSupportedEndiannessConversion ( pix_fmt ) )
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& & ( ret = ff_add_format ( & formats , pix_fmt ) ) < 0 ) {
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return ret ;
}
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}
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if ( ( ret = ff_formats_ref ( formats , & ctx - > outputs [ 0 ] - > in_formats ) ) < 0 )
return ret ;
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}
return 0 ;
}
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static const int * parse_yuv_type ( const char * s , enum AVColorSpace colorspace )
{
if ( ! s )
s = " bt601 " ;
if ( s & & strstr ( s , " bt709 " ) ) {
colorspace = AVCOL_SPC_BT709 ;
} else if ( s & & strstr ( s , " fcc " ) ) {
colorspace = AVCOL_SPC_FCC ;
} else if ( s & & strstr ( s , " smpte240m " ) ) {
colorspace = AVCOL_SPC_SMPTE240M ;
} else if ( s & & ( strstr ( s , " bt601 " ) | | strstr ( s , " bt470 " ) | | strstr ( s , " smpte170m " ) ) ) {
colorspace = AVCOL_SPC_BT470BG ;
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} else if ( s & & strstr ( s , " bt2020 " ) ) {
colorspace = AVCOL_SPC_BT2020_NCL ;
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}
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if ( colorspace < 1 | | colorspace > 10 | | colorspace = = 8 ) {
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colorspace = AVCOL_SPC_BT470BG ;
}
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return sws_getCoefficients ( colorspace ) ;
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}
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static int scale_eval_dimensions ( AVFilterContext * ctx )
{
ScaleContext * scale = ctx - > priv ;
const char scale2ref = ctx - > filter = = & ff_vf_scale2ref ;
const AVFilterLink * inlink = scale2ref ? ctx - > inputs [ 1 ] : ctx - > inputs [ 0 ] ;
const AVFilterLink * outlink = ctx - > outputs [ 0 ] ;
const AVPixFmtDescriptor * desc = av_pix_fmt_desc_get ( inlink - > format ) ;
const AVPixFmtDescriptor * out_desc = av_pix_fmt_desc_get ( outlink - > format ) ;
char * expr ;
int eval_w , eval_h ;
int ret ;
double res ;
const AVPixFmtDescriptor * main_desc ;
const AVFilterLink * main_link ;
if ( scale2ref ) {
main_link = ctx - > inputs [ 0 ] ;
main_desc = av_pix_fmt_desc_get ( main_link - > format ) ;
}
scale - > var_values [ VAR_IN_W ] = scale - > var_values [ VAR_IW ] = inlink - > w ;
scale - > var_values [ VAR_IN_H ] = scale - > var_values [ VAR_IH ] = inlink - > h ;
scale - > var_values [ VAR_OUT_W ] = scale - > var_values [ VAR_OW ] = NAN ;
scale - > var_values [ VAR_OUT_H ] = scale - > var_values [ VAR_OH ] = NAN ;
scale - > var_values [ VAR_A ] = ( double ) inlink - > w / inlink - > h ;
scale - > var_values [ VAR_SAR ] = inlink - > sample_aspect_ratio . num ?
( double ) inlink - > sample_aspect_ratio . num / inlink - > sample_aspect_ratio . den : 1 ;
scale - > var_values [ VAR_DAR ] = scale - > var_values [ VAR_A ] * scale - > var_values [ VAR_SAR ] ;
scale - > var_values [ VAR_HSUB ] = 1 < < desc - > log2_chroma_w ;
scale - > var_values [ VAR_VSUB ] = 1 < < desc - > log2_chroma_h ;
scale - > var_values [ VAR_OHSUB ] = 1 < < out_desc - > log2_chroma_w ;
scale - > var_values [ VAR_OVSUB ] = 1 < < out_desc - > log2_chroma_h ;
if ( scale2ref ) {
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scale - > var_values [ VAR_S2R_MAIN_W ] = main_link - > w ;
scale - > var_values [ VAR_S2R_MAIN_H ] = main_link - > h ;
scale - > var_values [ VAR_S2R_MAIN_A ] = ( double ) main_link - > w / main_link - > h ;
scale - > var_values [ VAR_S2R_MAIN_SAR ] = main_link - > sample_aspect_ratio . num ?
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( double ) main_link - > sample_aspect_ratio . num / main_link - > sample_aspect_ratio . den : 1 ;
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scale - > var_values [ VAR_S2R_MAIN_DAR ] = scale - > var_values [ VAR_S2R_MDAR ] =
scale - > var_values [ VAR_S2R_MAIN_A ] * scale - > var_values [ VAR_S2R_MAIN_SAR ] ;
scale - > var_values [ VAR_S2R_MAIN_HSUB ] = 1 < < main_desc - > log2_chroma_w ;
scale - > var_values [ VAR_S2R_MAIN_VSUB ] = 1 < < main_desc - > log2_chroma_h ;
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}
res = av_expr_eval ( scale - > w_pexpr , scale - > var_values , NULL ) ;
eval_w = scale - > var_values [ VAR_OUT_W ] = scale - > var_values [ VAR_OW ] = ( int ) res = = 0 ? inlink - > w : ( int ) res ;
res = av_expr_eval ( scale - > h_pexpr , scale - > var_values , NULL ) ;
if ( isnan ( res ) ) {
expr = scale - > h_expr ;
ret = AVERROR ( EINVAL ) ;
goto fail ;
}
eval_h = scale - > var_values [ VAR_OUT_H ] = scale - > var_values [ VAR_OH ] = ( int ) res = = 0 ? inlink - > h : ( int ) res ;
res = av_expr_eval ( scale - > w_pexpr , scale - > var_values , NULL ) ;
if ( isnan ( res ) ) {
expr = scale - > w_expr ;
ret = AVERROR ( EINVAL ) ;
goto fail ;
}
eval_w = scale - > var_values [ VAR_OUT_W ] = scale - > var_values [ VAR_OW ] = ( int ) res = = 0 ? inlink - > w : ( int ) res ;
scale - > w = eval_w ;
scale - > h = eval_h ;
return 0 ;
fail :
av_log ( ctx , AV_LOG_ERROR ,
" Error when evaluating the expression '%s'. \n " , expr ) ;
return ret ;
}
2009-11-12 00:50:21 +01:00
static int config_props ( AVFilterLink * outlink )
{
AVFilterContext * ctx = outlink - > src ;
2015-08-15 18:38:06 +02:00
AVFilterLink * inlink0 = outlink - > src - > inputs [ 0 ] ;
AVFilterLink * inlink = ctx - > filter = = & ff_vf_scale2ref ?
outlink - > src - > inputs [ 1 ] :
outlink - > src - > inputs [ 0 ] ;
2012-10-08 20:54:00 +02:00
enum AVPixelFormat outfmt = outlink - > format ;
2012-10-06 13:29:37 +02:00
const AVPixFmtDescriptor * desc = av_pix_fmt_desc_get ( inlink - > format ) ;
2017-02-02 01:30:18 +01:00
ScaleContext * scale = ctx - > priv ;
2011-03-27 22:58:08 +02:00
int ret ;
2009-11-12 00:50:21 +01:00
2019-12-31 12:40:58 +01:00
if ( ( ret = scale_eval_dimensions ( ctx ) ) < 0 )
2017-02-02 01:30:18 +01:00
goto fail ;
2014-01-25 14:40:48 +01:00
2019-12-31 12:40:58 +01:00
ff_scale_adjust_dimensions ( inlink , & scale - > w , & scale - > h ,
2019-12-02 16:41:21 +01:00
scale - > force_original_aspect_ratio ,
scale - > force_divisible_by ) ;
2013-08-04 01:30:00 +02:00
2019-12-31 12:40:58 +01:00
if ( scale - > w > INT_MAX | |
scale - > h > INT_MAX | |
( scale - > h * inlink - > w ) > INT_MAX | |
( scale - > w * inlink - > h ) > INT_MAX )
2009-11-12 00:50:21 +01:00
av_log ( ctx , AV_LOG_ERROR , " Rescaled value for width or height is too big. \n " ) ;
2019-12-31 12:40:58 +01:00
outlink - > w = scale - > w ;
outlink - > h = scale - > h ;
2009-11-12 00:50:21 +01:00
/* TODO: make algorithm configurable */
avutil/pixdesc: deprecate AV_PIX_FMT_FLAG_PSEUDOPAL
PSEUDOPAL pixel formats are not paletted, but carried a palette with the
intention of allowing code to treat unpaletted formats as paletted. The
palette simply mapped the byte values to the resulting RGB values,
making it some sort of LUT for RGB conversion.
It was used for 1 byte formats only: RGB4_BYTE, BGR4_BYTE, RGB8, BGR8,
GRAY8. The first 4 are awfully obscure, used only by some ancient bitmap
formats. The last one, GRAY8, is more common, but its treatment is
grossly incorrect. It considers full range GRAY8 only, so GRAY8 coming
from typical Y video planes was not mapped to the correct RGB values.
This cannot be fixed, because AVFrame.color_range can be freely changed
at runtime, and there is nothing to ensure the pseudo palette is
updated.
Also, nothing actually used the PSEUDOPAL palette data, except xwdenc
(trivially changed in the previous commit). All other code had to treat
it as a special case, just to ignore or to propagate palette data.
In conclusion, this was just a very strange old mechnaism that has no
real justification to exist anymore (although it may have been nice and
useful in the past). Now it's an artifact that makes the API harder to
use: API users who allocate their own pixel data have to be aware that
they need to allocate the palette, or FFmpeg will crash on them in
_some_ situations. On top of this, there was no API to allocate the
pseuo palette outside of av_frame_get_buffer().
This patch not only deprecates AV_PIX_FMT_FLAG_PSEUDOPAL, but also makes
the pseudo palette optional. Nothing accesses it anymore, though if it's
set, it's propagated. It's still allocated and initialized for
compatibility with API users that rely on this feature. But new API
users do not need to allocate it. This was an explicit goal of this
patch.
Most changes replace AV_PIX_FMT_FLAG_PSEUDOPAL with FF_PSEUDOPAL. I
first tried #ifdefing all code, but it was a mess. The FF_PSEUDOPAL
macro reduces the mess, and still allows defining FF_API_PSEUDOPAL to 0.
Passes FATE with FF_API_PSEUDOPAL enabled and disabled. In addition,
FATE passes with FF_API_PSEUDOPAL set to 1, but with allocation
functions manually changed to not allocating a palette.
2018-03-29 15:18:28 +02:00
scale - > input_is_pal = desc - > flags & AV_PIX_FMT_FLAG_PAL ;
2012-10-08 20:54:00 +02:00
if ( outfmt = = AV_PIX_FMT_PAL8 ) outfmt = AV_PIX_FMT_BGR8 ;
2013-05-15 10:50:20 +02:00
scale - > output_is_pal = av_pix_fmt_desc_get ( outfmt ) - > flags & AV_PIX_FMT_FLAG_PAL | |
avutil/pixdesc: deprecate AV_PIX_FMT_FLAG_PSEUDOPAL
PSEUDOPAL pixel formats are not paletted, but carried a palette with the
intention of allowing code to treat unpaletted formats as paletted. The
palette simply mapped the byte values to the resulting RGB values,
making it some sort of LUT for RGB conversion.
It was used for 1 byte formats only: RGB4_BYTE, BGR4_BYTE, RGB8, BGR8,
GRAY8. The first 4 are awfully obscure, used only by some ancient bitmap
formats. The last one, GRAY8, is more common, but its treatment is
grossly incorrect. It considers full range GRAY8 only, so GRAY8 coming
from typical Y video planes was not mapped to the correct RGB values.
This cannot be fixed, because AVFrame.color_range can be freely changed
at runtime, and there is nothing to ensure the pseudo palette is
updated.
Also, nothing actually used the PSEUDOPAL palette data, except xwdenc
(trivially changed in the previous commit). All other code had to treat
it as a special case, just to ignore or to propagate palette data.
In conclusion, this was just a very strange old mechnaism that has no
real justification to exist anymore (although it may have been nice and
useful in the past). Now it's an artifact that makes the API harder to
use: API users who allocate their own pixel data have to be aware that
they need to allocate the palette, or FFmpeg will crash on them in
_some_ situations. On top of this, there was no API to allocate the
pseuo palette outside of av_frame_get_buffer().
This patch not only deprecates AV_PIX_FMT_FLAG_PSEUDOPAL, but also makes
the pseudo palette optional. Nothing accesses it anymore, though if it's
set, it's propagated. It's still allocated and initialized for
compatibility with API users that rely on this feature. But new API
users do not need to allocate it. This was an explicit goal of this
patch.
Most changes replace AV_PIX_FMT_FLAG_PSEUDOPAL with FF_PSEUDOPAL. I
first tried #ifdefing all code, but it was a mess. The FF_PSEUDOPAL
macro reduces the mess, and still allows defining FF_API_PSEUDOPAL to 0.
Passes FATE with FF_API_PSEUDOPAL enabled and disabled. In addition,
FATE passes with FF_API_PSEUDOPAL set to 1, but with allocation
functions manually changed to not allocating a palette.
2018-03-29 15:18:28 +02:00
av_pix_fmt_desc_get ( outfmt ) - > flags & FF_PSEUDOPAL ;
2009-11-12 00:50:21 +01:00
2011-05-02 12:35:39 +02:00
if ( scale - > sws )
2011-03-09 03:30:24 +01:00
sws_freeContext ( scale - > sws ) ;
2013-07-14 05:19:46 +02:00
if ( scale - > isws [ 0 ] )
sws_freeContext ( scale - > isws [ 0 ] ) ;
if ( scale - > isws [ 1 ] )
sws_freeContext ( scale - > isws [ 1 ] ) ;
scale - > isws [ 0 ] = scale - > isws [ 1 ] = scale - > sws = NULL ;
2015-08-15 18:38:06 +02:00
if ( inlink0 - > w = = outlink - > w & &
inlink0 - > h = = outlink - > h & &
2015-08-30 23:49:04 +02:00
! scale - > out_color_matrix & &
2015-08-30 23:46:11 +02:00
scale - > in_range = = scale - > out_range & &
2015-08-15 18:38:06 +02:00
inlink0 - > format = = outlink - > format )
2013-07-14 05:19:46 +02:00
;
2012-03-29 07:02:27 +02:00
else {
2013-07-14 05:19:46 +02:00
struct SwsContext * * swscs [ 3 ] = { & scale - > sws , & scale - > isws [ 0 ] , & scale - > isws [ 1 ] } ;
int i ;
for ( i = 0 ; i < 3 ; i + + ) {
2017-02-06 16:03:17 +01:00
int in_v_chr_pos = scale - > in_v_chr_pos , out_v_chr_pos = scale - > out_v_chr_pos ;
2013-07-14 05:19:46 +02:00
struct SwsContext * * s = swscs [ i ] ;
* s = sws_alloc_context ( ) ;
if ( ! * s )
return AVERROR ( ENOMEM ) ;
2015-08-15 18:38:06 +02:00
av_opt_set_int ( * s , " srcw " , inlink0 - > w , 0 ) ;
av_opt_set_int ( * s , " srch " , inlink0 - > h > > ! ! i , 0 ) ;
av_opt_set_int ( * s , " src_format " , inlink0 - > format , 0 ) ;
2013-07-14 05:19:46 +02:00
av_opt_set_int ( * s , " dstw " , outlink - > w , 0 ) ;
av_opt_set_int ( * s , " dsth " , outlink - > h > > ! ! i , 0 ) ;
av_opt_set_int ( * s , " dst_format " , outfmt , 0 ) ;
av_opt_set_int ( * s , " sws_flags " , scale - > flags , 0 ) ;
2015-08-31 10:07:34 +02:00
av_opt_set_int ( * s , " param0 " , scale - > param [ 0 ] , 0 ) ;
av_opt_set_int ( * s , " param1 " , scale - > param [ 1 ] , 0 ) ;
2015-09-01 09:17:26 +02:00
if ( scale - > in_range ! = AVCOL_RANGE_UNSPECIFIED )
av_opt_set_int ( * s , " src_range " ,
scale - > in_range = = AVCOL_RANGE_JPEG , 0 ) ;
if ( scale - > out_range ! = AVCOL_RANGE_UNSPECIFIED )
av_opt_set_int ( * s , " dst_range " ,
scale - > out_range = = AVCOL_RANGE_JPEG , 0 ) ;
2013-07-14 05:19:46 +02:00
2015-08-08 14:43:12 +02:00
if ( scale - > opts ) {
AVDictionaryEntry * e = NULL ;
while ( ( e = av_dict_get ( scale - > opts , " " , e , AV_DICT_IGNORE_SUFFIX ) ) ) {
if ( ( ret = av_opt_set ( * s , e - > key , e - > value , 0 ) ) < 0 )
return ret ;
}
}
2015-09-23 15:06:01 +02:00
/* Override YUV420P default settings to have the correct (MPEG-2) chroma positions
2014-12-25 00:52:46 +01:00
* MPEG - 2 chroma positions are used by convention
* XXX : support other 4 : 2 : 0 pixel formats */
2015-09-23 15:06:01 +02:00
if ( inlink0 - > format = = AV_PIX_FMT_YUV420P & & scale - > in_v_chr_pos = = - 513 ) {
2017-02-06 16:03:17 +01:00
in_v_chr_pos = ( i = = 0 ) ? 128 : ( i = = 1 ) ? 64 : 192 ;
2014-12-25 00:52:46 +01:00
}
2015-09-23 15:06:01 +02:00
if ( outlink - > format = = AV_PIX_FMT_YUV420P & & scale - > out_v_chr_pos = = - 513 ) {
2017-02-06 16:03:17 +01:00
out_v_chr_pos = ( i = = 0 ) ? 128 : ( i = = 1 ) ? 64 : 192 ;
2014-12-25 00:52:46 +01:00
}
2013-07-24 18:33:58 +02:00
av_opt_set_int ( * s , " src_h_chr_pos " , scale - > in_h_chr_pos , 0 ) ;
2017-02-06 16:03:17 +01:00
av_opt_set_int ( * s , " src_v_chr_pos " , in_v_chr_pos , 0 ) ;
2013-07-14 05:03:06 +02:00
av_opt_set_int ( * s , " dst_h_chr_pos " , scale - > out_h_chr_pos , 0 ) ;
2017-02-06 16:03:17 +01:00
av_opt_set_int ( * s , " dst_v_chr_pos " , out_v_chr_pos , 0 ) ;
2013-07-14 05:03:06 +02:00
2013-07-14 05:19:46 +02:00
if ( ( ret = sws_init_context ( * s , NULL , NULL ) ) < 0 )
return ret ;
2013-07-18 11:03:56 +02:00
if ( ! scale - > interlaced )
break ;
2013-07-14 05:19:46 +02:00
}
2012-03-29 07:02:27 +02:00
}
2010-05-08 00:12:13 +02:00
2017-06-05 12:55:21 +02:00
if ( inlink0 - > sample_aspect_ratio . num ) {
outlink - > sample_aspect_ratio = av_mul_q ( ( AVRational ) { outlink - > h * inlink0 - > w , outlink - > w * inlink0 - > h } , inlink0 - > sample_aspect_ratio ) ;
2011-08-27 01:49:55 +02:00
} else
2017-06-05 12:55:21 +02:00
outlink - > sample_aspect_ratio = inlink0 - > sample_aspect_ratio ;
2011-08-27 01:49:55 +02:00
2012-07-14 18:26:04 +02:00
av_log ( ctx , AV_LOG_VERBOSE , " w:%d h:%d fmt:%s sar:%d/%d -> w:%d h:%d fmt:%s sar:%d/%d flags:0x%0x \n " ,
2012-10-12 17:04:58 +02:00
inlink - > w , inlink - > h , av_get_pix_fmt_name ( inlink - > format ) ,
2012-03-17 12:28:35 +01:00
inlink - > sample_aspect_ratio . num , inlink - > sample_aspect_ratio . den ,
2012-10-12 17:04:58 +02:00
outlink - > w , outlink - > h , av_get_pix_fmt_name ( outlink - > format ) ,
2012-03-17 12:28:35 +01:00
outlink - > sample_aspect_ratio . num , outlink - > sample_aspect_ratio . den ,
scale - > flags ) ;
2011-01-16 21:11:46 +01:00
return 0 ;
2011-03-27 22:58:08 +02:00
fail :
return ret ;
2009-11-12 00:50:21 +01:00
}
2015-08-15 18:38:06 +02:00
static int config_props_ref ( AVFilterLink * outlink )
{
AVFilterLink * inlink = outlink - > src - > inputs [ 1 ] ;
outlink - > w = inlink - > w ;
outlink - > h = inlink - > h ;
outlink - > sample_aspect_ratio = inlink - > sample_aspect_ratio ;
2015-08-18 15:06:10 +02:00
outlink - > time_base = inlink - > time_base ;
2017-11-08 09:15:29 +01:00
outlink - > frame_rate = inlink - > frame_rate ;
2015-08-15 18:38:06 +02:00
return 0 ;
}
2015-08-18 15:10:30 +02:00
static int request_frame ( AVFilterLink * outlink )
{
return ff_request_frame ( outlink - > src - > inputs [ 0 ] ) ;
}
static int request_frame_ref ( AVFilterLink * outlink )
{
return ff_request_frame ( outlink - > src - > inputs [ 1 ] ) ;
}
2013-03-10 01:30:30 +01:00
static int scale_slice ( AVFilterLink * link , AVFrame * out_buf , AVFrame * cur_pic , struct SwsContext * sws , int y , int h , int mul , int field )
2009-11-12 00:50:21 +01:00
{
ScaleContext * scale = link - > dst - > priv ;
2011-06-01 20:26:54 +02:00
const uint8_t * in [ 4 ] ;
uint8_t * out [ 4 ] ;
2011-03-28 00:09:58 +02:00
int in_stride [ 4 ] , out_stride [ 4 ] ;
int i ;
2019-09-26 17:36:54 +02:00
for ( i = 0 ; i < 4 ; i + + ) {
2011-03-28 00:09:58 +02:00
int vsub = ( ( i + 1 ) & 2 ) ? scale - > vsub : 0 ;
in_stride [ i ] = cur_pic - > linesize [ i ] * mul ;
out_stride [ i ] = out_buf - > linesize [ i ] * mul ;
in [ i ] = cur_pic - > data [ i ] + ( ( y > > vsub ) + field ) * cur_pic - > linesize [ i ] ;
out [ i ] = out_buf - > data [ i ] + field * out_buf - > linesize [ i ] ;
}
2019-09-26 17:36:54 +02:00
if ( scale - > input_is_pal )
2011-03-28 00:09:58 +02:00
in [ 1 ] = cur_pic - > data [ 1 ] ;
2019-09-26 17:36:54 +02:00
if ( scale - > output_is_pal )
2011-03-28 00:09:58 +02:00
out [ 1 ] = out_buf - > data [ 1 ] ;
return sws_scale ( sws , in , in_stride , y / mul , h ,
out , out_stride ) ;
}
2019-09-07 17:11:25 +02:00
static int scale_frame ( AVFilterLink * link , AVFrame * in , AVFrame * * frame_out )
2009-11-12 00:50:21 +01:00
{
2019-12-08 11:24:28 +01:00
AVFilterContext * ctx = link - > dst ;
ScaleContext * scale = ctx - > priv ;
AVFilterLink * outlink = ctx - > outputs [ 0 ] ;
2012-11-28 08:41:07 +01:00
AVFrame * out ;
2012-11-29 01:19:35 +01:00
const AVPixFmtDescriptor * desc = av_pix_fmt_desc_get ( link - > format ) ;
char buf [ 32 ] ;
2013-07-25 01:27:00 +02:00
int in_range ;
2019-12-08 11:13:42 +01:00
int frame_changed ;
2012-11-29 01:19:35 +01:00
2019-09-07 17:11:25 +02:00
* frame_out = NULL ;
2017-04-22 10:57:18 +02:00
if ( in - > colorspace = = AVCOL_SPC_YCGCO )
2015-04-13 13:45:41 +02:00
av_log ( link - > dst , AV_LOG_WARNING , " Detected unsupported YCgCo colorspace. \n " ) ;
2019-12-08 11:13:42 +01:00
frame_changed = in - > width ! = link - > w | |
in - > height ! = link - > h | |
in - > format ! = link - > format | |
in - > sample_aspect_ratio . den ! = link - > sample_aspect_ratio . den | |
in - > sample_aspect_ratio . num ! = link - > sample_aspect_ratio . num ;
2019-12-15 14:26:06 +01:00
if ( scale - > eval_mode = = EVAL_MODE_FRAME | | frame_changed ) {
2012-11-29 01:19:35 +01:00
int ret ;
2019-12-15 14:26:06 +01:00
unsigned vars_w [ VARS_NB ] = { 0 } , vars_h [ VARS_NB ] = { 0 } ;
av_expr_count_vars ( scale - > w_pexpr , vars_w , VARS_NB ) ;
av_expr_count_vars ( scale - > h_pexpr , vars_h , VARS_NB ) ;
if ( scale - > eval_mode = = EVAL_MODE_FRAME & &
! frame_changed & &
ctx - > filter ! = & ff_vf_scale2ref & &
! ( vars_w [ VAR_N ] | | vars_w [ VAR_T ] | | vars_w [ VAR_POS ] ) & &
! ( vars_h [ VAR_N ] | | vars_h [ VAR_T ] | | vars_h [ VAR_POS ] ) & &
scale - > w & & scale - > h )
goto scale ;
2016-01-18 18:44:09 +01:00
if ( scale - > eval_mode = = EVAL_MODE_INIT ) {
snprintf ( buf , sizeof ( buf ) - 1 , " %d " , outlink - > w ) ;
av_opt_set ( scale , " w " , buf , 0 ) ;
snprintf ( buf , sizeof ( buf ) - 1 , " %d " , outlink - > h ) ;
av_opt_set ( scale , " h " , buf , 0 ) ;
2019-12-31 12:40:58 +01:00
ret = scale_parse_expr ( ctx , NULL , & scale - > w_pexpr , " width " , scale - > w_expr ) ;
if ( ret < 0 )
return ret ;
ret = scale_parse_expr ( ctx , NULL , & scale - > h_pexpr , " height " , scale - > h_expr ) ;
if ( ret < 0 )
return ret ;
2016-01-18 18:44:09 +01:00
}
2009-11-12 00:50:21 +01:00
2019-12-15 14:26:06 +01:00
if ( ctx - > filter = = & ff_vf_scale2ref ) {
scale - > var_values [ VAR_S2R_MAIN_N ] = link - > frame_count_out ;
scale - > var_values [ VAR_S2R_MAIN_T ] = TS2T ( in - > pts , link - > time_base ) ;
scale - > var_values [ VAR_S2R_MAIN_POS ] = in - > pkt_pos = = - 1 ? NAN : in - > pkt_pos ;
} else {
scale - > var_values [ VAR_N ] = link - > frame_count_out ;
scale - > var_values [ VAR_T ] = TS2T ( in - > pts , link - > time_base ) ;
scale - > var_values [ VAR_POS ] = in - > pkt_pos = = - 1 ? NAN : in - > pkt_pos ;
}
2012-11-29 01:19:35 +01:00
link - > dst - > inputs [ 0 ] - > format = in - > format ;
2013-03-10 01:30:30 +01:00
link - > dst - > inputs [ 0 ] - > w = in - > width ;
link - > dst - > inputs [ 0 ] - > h = in - > height ;
2012-11-29 01:19:35 +01:00
2016-01-18 18:44:09 +01:00
link - > dst - > inputs [ 0 ] - > sample_aspect_ratio . den = in - > sample_aspect_ratio . den ;
link - > dst - > inputs [ 0 ] - > sample_aspect_ratio . num = in - > sample_aspect_ratio . num ;
2012-11-29 01:19:35 +01:00
if ( ( ret = config_props ( outlink ) ) < 0 )
return ret ;
2012-03-29 07:02:27 +02:00
}
2019-12-15 14:26:06 +01:00
scale :
2019-09-07 17:11:25 +02:00
if ( ! scale - > sws ) {
* frame_out = in ;
return 0 ;
}
2012-11-29 01:19:35 +01:00
scale - > hsub = desc - > log2_chroma_w ;
scale - > vsub = desc - > log2_chroma_h ;
2012-11-28 08:41:07 +01:00
out = ff_get_video_buffer ( outlink , outlink - > w , outlink - > h ) ;
2012-11-29 01:19:35 +01:00
if ( ! out ) {
2012-11-28 08:41:07 +01:00
av_frame_free ( & in ) ;
2012-11-29 01:19:35 +01:00
return AVERROR ( ENOMEM ) ;
}
2019-09-07 17:11:25 +02:00
* frame_out = out ;
2012-11-29 01:19:35 +01:00
2012-11-28 08:41:07 +01:00
av_frame_copy_props ( out , in ) ;
out - > width = outlink - > w ;
out - > height = outlink - > h ;
2012-11-29 01:19:35 +01:00
2019-09-26 17:36:54 +02:00
if ( scale - > output_is_pal )
2012-11-29 01:19:35 +01:00
avpriv_set_systematic_pal2 ( ( uint32_t * ) out - > data [ 1 ] , outlink - > format = = AV_PIX_FMT_PAL8 ? AV_PIX_FMT_BGR8 : outlink - > format ) ;
2017-04-22 10:57:18 +02:00
in_range = in - > color_range ;
2013-07-25 01:27:00 +02:00
2013-07-20 22:11:50 +02:00
if ( scale - > in_color_matrix
| | scale - > out_color_matrix
| | scale - > in_range ! = AVCOL_RANGE_UNSPECIFIED
2013-07-25 01:27:00 +02:00
| | in_range ! = AVCOL_RANGE_UNSPECIFIED
2013-07-20 22:11:50 +02:00
| | scale - > out_range ! = AVCOL_RANGE_UNSPECIFIED ) {
int in_full , out_full , brightness , contrast , saturation ;
const int * inv_table , * table ;
sws_getColorspaceDetails ( scale - > sws , ( int * * ) & inv_table , & in_full ,
( int * * ) & table , & out_full ,
& brightness , & contrast , & saturation ) ;
if ( scale - > in_color_matrix )
2017-04-22 10:57:18 +02:00
inv_table = parse_yuv_type ( scale - > in_color_matrix , in - > colorspace ) ;
2013-07-20 22:11:50 +02:00
if ( scale - > out_color_matrix )
table = parse_yuv_type ( scale - > out_color_matrix , AVCOL_SPC_UNSPECIFIED ) ;
2015-08-31 00:17:50 +02:00
else if ( scale - > in_color_matrix )
table = inv_table ;
2013-07-20 22:11:50 +02:00
2013-07-20 22:12:42 +02:00
if ( scale - > in_range ! = AVCOL_RANGE_UNSPECIFIED )
in_full = ( scale - > in_range = = AVCOL_RANGE_JPEG ) ;
2013-07-25 01:27:00 +02:00
else if ( in_range ! = AVCOL_RANGE_UNSPECIFIED )
in_full = ( in_range = = AVCOL_RANGE_JPEG ) ;
2013-07-20 22:12:42 +02:00
if ( scale - > out_range ! = AVCOL_RANGE_UNSPECIFIED )
out_full = ( scale - > out_range = = AVCOL_RANGE_JPEG ) ;
2013-07-20 22:11:50 +02:00
sws_setColorspaceDetails ( scale - > sws , inv_table , in_full ,
table , out_full ,
brightness , contrast , saturation ) ;
if ( scale - > isws [ 0 ] )
2013-07-20 22:20:25 +02:00
sws_setColorspaceDetails ( scale - > isws [ 0 ] , inv_table , in_full ,
table , out_full ,
brightness , contrast , saturation ) ;
2013-07-20 22:11:50 +02:00
if ( scale - > isws [ 1 ] )
2013-07-20 22:20:25 +02:00
sws_setColorspaceDetails ( scale - > isws [ 1 ] , inv_table , in_full ,
table , out_full ,
brightness , contrast , saturation ) ;
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out - > color_range = out_full ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG ;
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}
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av_reduce ( & out - > sample_aspect_ratio . num , & out - > sample_aspect_ratio . den ,
( int64_t ) in - > sample_aspect_ratio . num * outlink - > h * link - > w ,
( int64_t ) in - > sample_aspect_ratio . den * outlink - > w * link - > h ,
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INT_MAX ) ;
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if ( scale - > interlaced > 0 | | ( scale - > interlaced < 0 & & in - > interlaced_frame ) ) {
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scale_slice ( link , out , in , scale - > isws [ 0 ] , 0 , ( link - > h + 1 ) / 2 , 2 , 0 ) ;
scale_slice ( link , out , in , scale - > isws [ 1 ] , 0 , link - > h / 2 , 2 , 1 ) ;
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} else if ( scale - > nb_slices ) {
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int i , slice_h , slice_start , slice_end = 0 ;
const int nb_slices = FFMIN ( scale - > nb_slices , link - > h ) ;
for ( i = 0 ; i < nb_slices ; i + + ) {
slice_start = slice_end ;
slice_end = ( link - > h * ( i + 1 ) ) / nb_slices ;
slice_h = slice_end - slice_start ;
scale_slice ( link , out , in , scale - > sws , slice_start , slice_h , 1 , 0 ) ;
}
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} else {
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scale_slice ( link , out , in , scale - > sws , 0 , link - > h , 1 , 0 ) ;
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}
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av_frame_free ( & in ) ;
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return 0 ;
}
static int filter_frame ( AVFilterLink * link , AVFrame * in )
{
AVFilterContext * ctx = link - > dst ;
AVFilterLink * outlink = ctx - > outputs [ 0 ] ;
AVFrame * out ;
int ret ;
ret = scale_frame ( link , in , & out ) ;
if ( out )
return ff_filter_frame ( outlink , out ) ;
return ret ;
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}
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static int filter_frame_ref ( AVFilterLink * link , AVFrame * in )
{
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ScaleContext * scale = link - > dst - > priv ;
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AVFilterLink * outlink = link - > dst - > outputs [ 1 ] ;
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int frame_changed ;
frame_changed = in - > width ! = link - > w | |
in - > height ! = link - > h | |
in - > format ! = link - > format | |
in - > sample_aspect_ratio . den ! = link - > sample_aspect_ratio . den | |
in - > sample_aspect_ratio . num ! = link - > sample_aspect_ratio . num ;
if ( frame_changed ) {
link - > format = in - > format ;
link - > w = in - > width ;
link - > h = in - > height ;
link - > sample_aspect_ratio . num = in - > sample_aspect_ratio . num ;
link - > sample_aspect_ratio . den = in - > sample_aspect_ratio . den ;
config_props_ref ( outlink ) ;
}
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if ( scale - > eval_mode = = EVAL_MODE_FRAME ) {
scale - > var_values [ VAR_N ] = link - > frame_count_out ;
scale - > var_values [ VAR_T ] = TS2T ( in - > pts , link - > time_base ) ;
scale - > var_values [ VAR_POS ] = in - > pkt_pos = = - 1 ? NAN : in - > pkt_pos ;
}
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return ff_filter_frame ( outlink , in ) ;
}
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static int process_command ( AVFilterContext * ctx , const char * cmd , const char * args ,
char * res , int res_len , int flags )
{
ScaleContext * scale = ctx - > priv ;
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char * str_expr ;
AVExpr * * pexpr_ptr ;
int ret , w , h ;
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w = ! strcmp ( cmd , " width " ) | | ! strcmp ( cmd , " w " ) ;
h = ! strcmp ( cmd , " height " ) | | ! strcmp ( cmd , " h " ) ;
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if ( w | | h ) {
str_expr = w ? scale - > w_expr : scale - > h_expr ;
pexpr_ptr = w ? & scale - > w_pexpr : & scale - > h_pexpr ;
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ret = scale_parse_expr ( ctx , str_expr , pexpr_ptr , cmd , args ) ;
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} else
ret = AVERROR ( ENOSYS ) ;
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if ( ret < 0 )
av_log ( ctx , AV_LOG_ERROR , " Failed to process command. Continuing with existing parameters. \n " ) ;
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return ret ;
}
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# if FF_API_CHILD_CLASS_NEXT
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static const AVClass * child_class_next ( const AVClass * prev )
{
return prev ? NULL : sws_get_class ( ) ;
}
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# endif
static const AVClass * child_class_iterate ( void * * iter )
{
const AVClass * c = * iter ? NULL : sws_get_class ( ) ;
* iter = ( void * ) ( uintptr_t ) c ;
return c ;
}
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# define OFFSET(x) offsetof(ScaleContext, x)
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# define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
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# define TFLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
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static const AVOption scale_options [ ] = {
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{ " w " , " Output video width " , OFFSET ( w_expr ) , AV_OPT_TYPE_STRING , . flags = TFLAGS } ,
{ " width " , " Output video width " , OFFSET ( w_expr ) , AV_OPT_TYPE_STRING , . flags = TFLAGS } ,
{ " h " , " Output video height " , OFFSET ( h_expr ) , AV_OPT_TYPE_STRING , . flags = TFLAGS } ,
{ " height " , " Output video height " , OFFSET ( h_expr ) , AV_OPT_TYPE_STRING , . flags = TFLAGS } ,
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{ " flags " , " Flags to pass to libswscale " , OFFSET ( flags_str ) , AV_OPT_TYPE_STRING , { . str = " bilinear " } , . flags = FLAGS } ,
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{ " interl " , " set interlacing " , OFFSET ( interlaced ) , AV_OPT_TYPE_BOOL , { . i64 = 0 } , - 1 , 1 , FLAGS } ,
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{ " size " , " set video size " , OFFSET ( size_str ) , AV_OPT_TYPE_STRING , { . str = NULL } , 0 , FLAGS } ,
{ " s " , " set video size " , OFFSET ( size_str ) , AV_OPT_TYPE_STRING , { . str = NULL } , 0 , FLAGS } ,
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{ " in_color_matrix " , " set input YCbCr type " , OFFSET ( in_color_matrix ) , AV_OPT_TYPE_STRING , { . str = " auto " } , . flags = FLAGS , " color " } ,
{ " out_color_matrix " , " set output YCbCr type " , OFFSET ( out_color_matrix ) , AV_OPT_TYPE_STRING , { . str = NULL } , . flags = FLAGS , " color " } ,
{ " auto " , NULL , 0 , AV_OPT_TYPE_CONST , { . str = " auto " } , 0 , 0 , FLAGS , " color " } ,
{ " bt601 " , NULL , 0 , AV_OPT_TYPE_CONST , { . str = " bt601 " } , 0 , 0 , FLAGS , " color " } ,
{ " bt470 " , NULL , 0 , AV_OPT_TYPE_CONST , { . str = " bt470 " } , 0 , 0 , FLAGS , " color " } ,
{ " smpte170m " , NULL , 0 , AV_OPT_TYPE_CONST , { . str = " smpte170m " } , 0 , 0 , FLAGS , " color " } ,
{ " bt709 " , NULL , 0 , AV_OPT_TYPE_CONST , { . str = " bt709 " } , 0 , 0 , FLAGS , " color " } ,
{ " fcc " , NULL , 0 , AV_OPT_TYPE_CONST , { . str = " fcc " } , 0 , 0 , FLAGS , " color " } ,
{ " smpte240m " , NULL , 0 , AV_OPT_TYPE_CONST , { . str = " smpte240m " } , 0 , 0 , FLAGS , " color " } ,
{ " bt2020 " , NULL , 0 , AV_OPT_TYPE_CONST , { . str = " bt2020 " } , 0 , 0 , FLAGS , " color " } ,
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{ " in_range " , " set input color range " , OFFSET ( in_range ) , AV_OPT_TYPE_INT , { . i64 = AVCOL_RANGE_UNSPECIFIED } , 0 , 2 , FLAGS , " range " } ,
{ " out_range " , " set output color range " , OFFSET ( out_range ) , AV_OPT_TYPE_INT , { . i64 = AVCOL_RANGE_UNSPECIFIED } , 0 , 2 , FLAGS , " range " } ,
{ " auto " , NULL , 0 , AV_OPT_TYPE_CONST , { . i64 = AVCOL_RANGE_UNSPECIFIED } , 0 , 0 , FLAGS , " range " } ,
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{ " unknown " , NULL , 0 , AV_OPT_TYPE_CONST , { . i64 = AVCOL_RANGE_UNSPECIFIED } , 0 , 0 , FLAGS , " range " } ,
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{ " full " , NULL , 0 , AV_OPT_TYPE_CONST , { . i64 = AVCOL_RANGE_JPEG } , 0 , 0 , FLAGS , " range " } ,
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{ " limited " , NULL , 0 , AV_OPT_TYPE_CONST , { . i64 = AVCOL_RANGE_MPEG } , 0 , 0 , FLAGS , " range " } ,
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{ " jpeg " , NULL , 0 , AV_OPT_TYPE_CONST , { . i64 = AVCOL_RANGE_JPEG } , 0 , 0 , FLAGS , " range " } ,
{ " mpeg " , NULL , 0 , AV_OPT_TYPE_CONST , { . i64 = AVCOL_RANGE_MPEG } , 0 , 0 , FLAGS , " range " } ,
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{ " tv " , NULL , 0 , AV_OPT_TYPE_CONST , { . i64 = AVCOL_RANGE_MPEG } , 0 , 0 , FLAGS , " range " } ,
{ " pc " , NULL , 0 , AV_OPT_TYPE_CONST , { . i64 = AVCOL_RANGE_JPEG } , 0 , 0 , FLAGS , " range " } ,
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{ " in_v_chr_pos " , " input vertical chroma position in luma grid/256 " , OFFSET ( in_v_chr_pos ) , AV_OPT_TYPE_INT , { . i64 = - 513 } , - 513 , 512 , FLAGS } ,
{ " in_h_chr_pos " , " input horizontal chroma position in luma grid/256 " , OFFSET ( in_h_chr_pos ) , AV_OPT_TYPE_INT , { . i64 = - 513 } , - 513 , 512 , FLAGS } ,
{ " out_v_chr_pos " , " output vertical chroma position in luma grid/256 " , OFFSET ( out_v_chr_pos ) , AV_OPT_TYPE_INT , { . i64 = - 513 } , - 513 , 512 , FLAGS } ,
{ " out_h_chr_pos " , " output horizontal chroma position in luma grid/256 " , OFFSET ( out_h_chr_pos ) , AV_OPT_TYPE_INT , { . i64 = - 513 } , - 513 , 512 , FLAGS } ,
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{ " force_original_aspect_ratio " , " decrease or increase w/h if necessary to keep the original AR " , OFFSET ( force_original_aspect_ratio ) , AV_OPT_TYPE_INT , { . i64 = 0 } , 0 , 2 , FLAGS , " force_oar " } ,
{ " disable " , NULL , 0 , AV_OPT_TYPE_CONST , { . i64 = 0 } , 0 , 0 , FLAGS , " force_oar " } ,
{ " decrease " , NULL , 0 , AV_OPT_TYPE_CONST , { . i64 = 1 } , 0 , 0 , FLAGS , " force_oar " } ,
{ " increase " , NULL , 0 , AV_OPT_TYPE_CONST , { . i64 = 2 } , 0 , 0 , FLAGS , " force_oar " } ,
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{ " force_divisible_by " , " enforce that the output resolution is divisible by a defined integer when force_original_aspect_ratio is used " , OFFSET ( force_divisible_by ) , AV_OPT_TYPE_INT , { . i64 = 1 } , 1 , 256 , FLAGS } ,
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{ " param0 " , " Scaler param 0 " , OFFSET ( param [ 0 ] ) , AV_OPT_TYPE_DOUBLE , { . dbl = SWS_PARAM_DEFAULT } , INT_MIN , INT_MAX , FLAGS } ,
{ " param1 " , " Scaler param 1 " , OFFSET ( param [ 1 ] ) , AV_OPT_TYPE_DOUBLE , { . dbl = SWS_PARAM_DEFAULT } , INT_MIN , INT_MAX , FLAGS } ,
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{ " nb_slices " , " set the number of slices (debug purpose only) " , OFFSET ( nb_slices ) , AV_OPT_TYPE_INT , { . i64 = 0 } , 0 , INT_MAX , FLAGS } ,
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{ " eval " , " specify when to evaluate expressions " , OFFSET ( eval_mode ) , AV_OPT_TYPE_INT , { . i64 = EVAL_MODE_INIT } , 0 , EVAL_MODE_NB - 1 , FLAGS , " eval " } ,
{ " init " , " eval expressions once during initialization " , 0 , AV_OPT_TYPE_CONST , { . i64 = EVAL_MODE_INIT } , . flags = FLAGS , . unit = " eval " } ,
{ " frame " , " eval expressions during initialization and per-frame " , 0 , AV_OPT_TYPE_CONST , { . i64 = EVAL_MODE_FRAME } , . flags = FLAGS , . unit = " eval " } ,
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{ NULL }
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} ;
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static const AVClass scale_class = {
. class_name = " scale " ,
. item_name = av_default_item_name ,
. option = scale_options ,
. version = LIBAVUTIL_VERSION_INT ,
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. category = AV_CLASS_CATEGORY_FILTER ,
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# if FF_API_CHILD_CLASS_NEXT
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. child_class_next = child_class_next ,
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# endif
. child_class_iterate = child_class_iterate ,
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} ;
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static const AVFilterPad avfilter_vf_scale_inputs [ ] = {
{
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. name = " default " ,
. type = AVMEDIA_TYPE_VIDEO ,
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. filter_frame = filter_frame ,
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} ,
{ NULL }
} ;
static const AVFilterPad avfilter_vf_scale_outputs [ ] = {
{
. name = " default " ,
. type = AVMEDIA_TYPE_VIDEO ,
. config_props = config_props ,
} ,
{ NULL }
} ;
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AVFilter ff_vf_scale = {
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. name = " scale " ,
. description = NULL_IF_CONFIG_SMALL ( " Scale the input video size and/or convert the image format. " ) ,
. init_dict = init_dict ,
. uninit = uninit ,
. query_formats = query_formats ,
. priv_size = sizeof ( ScaleContext ) ,
. priv_class = & scale_class ,
. inputs = avfilter_vf_scale_inputs ,
. outputs = avfilter_vf_scale_outputs ,
. process_command = process_command ,
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} ;
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static const AVClass scale2ref_class = {
. class_name = " scale2ref " ,
. item_name = av_default_item_name ,
. option = scale_options ,
. version = LIBAVUTIL_VERSION_INT ,
. category = AV_CLASS_CATEGORY_FILTER ,
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# if FF_API_CHILD_CLASS_NEXT
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. child_class_next = child_class_next ,
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# endif
. child_class_iterate = child_class_iterate ,
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} ;
static const AVFilterPad avfilter_vf_scale2ref_inputs [ ] = {
{
. name = " default " ,
. type = AVMEDIA_TYPE_VIDEO ,
. filter_frame = filter_frame ,
} ,
{
. name = " ref " ,
. type = AVMEDIA_TYPE_VIDEO ,
. filter_frame = filter_frame_ref ,
} ,
{ NULL }
} ;
static const AVFilterPad avfilter_vf_scale2ref_outputs [ ] = {
{
. name = " default " ,
. type = AVMEDIA_TYPE_VIDEO ,
. config_props = config_props ,
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. request_frame = request_frame ,
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} ,
{
. name = " ref " ,
. type = AVMEDIA_TYPE_VIDEO ,
. config_props = config_props_ref ,
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. request_frame = request_frame_ref ,
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} ,
{ NULL }
} ;
AVFilter ff_vf_scale2ref = {
. name = " scale2ref " ,
. description = NULL_IF_CONFIG_SMALL ( " Scale the input video size and/or convert the image format to the given reference. " ) ,
. init_dict = init_dict ,
. uninit = uninit ,
. query_formats = query_formats ,
. priv_size = sizeof ( ScaleContext ) ,
. priv_class = & scale2ref_class ,
. inputs = avfilter_vf_scale2ref_inputs ,
. outputs = avfilter_vf_scale2ref_outputs ,
. process_command = process_command ,
} ;