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/*
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* This file is part of FFmpeg .
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*
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* FFmpeg is free software ; you can redistribute it and / or
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* 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 .
*
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* FFmpeg is distributed in the hope that it will be useful ,
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* 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
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* License along with FFmpeg ; if not , write to the Free Software
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* Foundation , Inc . , 51 Franklin Street , Fifth Floor , Boston , MA 02110 - 1301 USA
*/
/**
* @ file
* scale video filter
*/
# include <nppi.h>
# include <stdio.h>
# include <string.h>
# include "libavutil/avstring.h"
# include "libavutil/common.h"
# include "libavutil/hwcontext.h"
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# include "libavutil/hwcontext_cuda_internal.h"
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# include "libavutil/cuda_check.h"
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# include "libavutil/internal.h"
# include "libavutil/opt.h"
# include "libavutil/pixdesc.h"
# include "avfilter.h"
# include "formats.h"
# include "internal.h"
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# include "scale_eval.h"
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# include "video.h"
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# define CHECK_CU(x) FF_CUDA_CHECK_DL(ctx, device_hwctx->internal->cuda_dl, x)
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static const enum AVPixelFormat supported_formats [ ] = {
AV_PIX_FMT_YUV420P ,
AV_PIX_FMT_NV12 ,
AV_PIX_FMT_YUV444P ,
} ;
static const enum AVPixelFormat deinterleaved_formats [ ] [ 2 ] = {
{ AV_PIX_FMT_NV12 , AV_PIX_FMT_YUV420P } ,
} ;
enum ScaleStage {
STAGE_DEINTERLEAVE ,
STAGE_RESIZE ,
STAGE_INTERLEAVE ,
STAGE_NB ,
} ;
typedef struct NPPScaleStageContext {
int stage_needed ;
enum AVPixelFormat in_fmt ;
enum AVPixelFormat out_fmt ;
struct {
int width ;
int height ;
} planes_in [ 3 ] , planes_out [ 3 ] ;
AVBufferRef * frames_ctx ;
AVFrame * frame ;
} NPPScaleStageContext ;
typedef struct NPPScaleContext {
const AVClass * class ;
NPPScaleStageContext stages [ STAGE_NB ] ;
AVFrame * tmp_frame ;
int passthrough ;
int shift_width , shift_height ;
/**
* New dimensions . Special values are :
* 0 = original width / height
* - 1 = keep original aspect
*/
int w , h ;
/**
* Output sw format . AV_PIX_FMT_NONE for no conversion .
*/
enum AVPixelFormat format ;
char * w_expr ; ///< width expression string
char * h_expr ; ///< height expression string
char * format_str ;
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int force_original_aspect_ratio ;
int force_divisible_by ;
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int interp_algo ;
} NPPScaleContext ;
static int nppscale_init ( AVFilterContext * ctx )
{
NPPScaleContext * s = ctx - > priv ;
int i ;
if ( ! strcmp ( s - > format_str , " same " ) ) {
s - > format = AV_PIX_FMT_NONE ;
} else {
s - > format = av_get_pix_fmt ( s - > format_str ) ;
if ( s - > format = = AV_PIX_FMT_NONE ) {
av_log ( ctx , AV_LOG_ERROR , " Unrecognized pixel format: %s \n " , s - > format_str ) ;
return AVERROR ( EINVAL ) ;
}
}
for ( i = 0 ; i < FF_ARRAY_ELEMS ( s - > stages ) ; i + + ) {
s - > stages [ i ] . frame = av_frame_alloc ( ) ;
if ( ! s - > stages [ i ] . frame )
return AVERROR ( ENOMEM ) ;
}
s - > tmp_frame = av_frame_alloc ( ) ;
if ( ! s - > tmp_frame )
return AVERROR ( ENOMEM ) ;
return 0 ;
}
static void nppscale_uninit ( AVFilterContext * ctx )
{
NPPScaleContext * s = ctx - > priv ;
int i ;
for ( i = 0 ; i < FF_ARRAY_ELEMS ( s - > stages ) ; i + + ) {
av_frame_free ( & s - > stages [ i ] . frame ) ;
av_buffer_unref ( & s - > stages [ i ] . frames_ctx ) ;
}
av_frame_free ( & s - > tmp_frame ) ;
}
static int nppscale_query_formats ( AVFilterContext * ctx )
{
static const enum AVPixelFormat pixel_formats [ ] = {
AV_PIX_FMT_CUDA , AV_PIX_FMT_NONE ,
} ;
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return ff_set_common_formats_from_list ( ctx , pixel_formats ) ;
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}
static int init_stage ( NPPScaleStageContext * stage , AVBufferRef * device_ctx )
{
AVBufferRef * out_ref = NULL ;
AVHWFramesContext * out_ctx ;
int in_sw , in_sh , out_sw , out_sh ;
int ret , i ;
av_pix_fmt_get_chroma_sub_sample ( stage - > in_fmt , & in_sw , & in_sh ) ;
av_pix_fmt_get_chroma_sub_sample ( stage - > out_fmt , & out_sw , & out_sh ) ;
if ( ! stage - > planes_out [ 0 ] . width ) {
stage - > planes_out [ 0 ] . width = stage - > planes_in [ 0 ] . width ;
stage - > planes_out [ 0 ] . height = stage - > planes_in [ 0 ] . height ;
}
for ( i = 1 ; i < FF_ARRAY_ELEMS ( stage - > planes_in ) ; i + + ) {
stage - > planes_in [ i ] . width = stage - > planes_in [ 0 ] . width > > in_sw ;
stage - > planes_in [ i ] . height = stage - > planes_in [ 0 ] . height > > in_sh ;
stage - > planes_out [ i ] . width = stage - > planes_out [ 0 ] . width > > out_sw ;
stage - > planes_out [ i ] . height = stage - > planes_out [ 0 ] . height > > out_sh ;
}
out_ref = av_hwframe_ctx_alloc ( device_ctx ) ;
if ( ! out_ref )
return AVERROR ( ENOMEM ) ;
out_ctx = ( AVHWFramesContext * ) out_ref - > data ;
out_ctx - > format = AV_PIX_FMT_CUDA ;
out_ctx - > sw_format = stage - > out_fmt ;
out_ctx - > width = FFALIGN ( stage - > planes_out [ 0 ] . width , 32 ) ;
out_ctx - > height = FFALIGN ( stage - > planes_out [ 0 ] . height , 32 ) ;
ret = av_hwframe_ctx_init ( out_ref ) ;
if ( ret < 0 )
goto fail ;
av_frame_unref ( stage - > frame ) ;
ret = av_hwframe_get_buffer ( out_ref , stage - > frame , 0 ) ;
if ( ret < 0 )
goto fail ;
stage - > frame - > width = stage - > planes_out [ 0 ] . width ;
stage - > frame - > height = stage - > planes_out [ 0 ] . height ;
av_buffer_unref ( & stage - > frames_ctx ) ;
stage - > frames_ctx = out_ref ;
return 0 ;
fail :
av_buffer_unref ( & out_ref ) ;
return ret ;
}
static int format_is_supported ( enum AVPixelFormat fmt )
{
int i ;
for ( i = 0 ; i < FF_ARRAY_ELEMS ( supported_formats ) ; i + + )
if ( supported_formats [ i ] = = fmt )
return 1 ;
return 0 ;
}
static enum AVPixelFormat get_deinterleaved_format ( enum AVPixelFormat fmt )
{
const AVPixFmtDescriptor * desc = av_pix_fmt_desc_get ( fmt ) ;
int i , planes ;
planes = av_pix_fmt_count_planes ( fmt ) ;
if ( planes = = desc - > nb_components )
return fmt ;
for ( i = 0 ; i < FF_ARRAY_ELEMS ( deinterleaved_formats ) ; i + + )
if ( deinterleaved_formats [ i ] [ 0 ] = = fmt )
return deinterleaved_formats [ i ] [ 1 ] ;
return AV_PIX_FMT_NONE ;
}
static int init_processing_chain ( AVFilterContext * ctx , int in_width , int in_height ,
int out_width , int out_height )
{
NPPScaleContext * s = ctx - > priv ;
AVHWFramesContext * in_frames_ctx ;
enum AVPixelFormat in_format ;
enum AVPixelFormat out_format ;
enum AVPixelFormat in_deinterleaved_format ;
enum AVPixelFormat out_deinterleaved_format ;
int i , ret , last_stage = - 1 ;
/* check that we have a hw context */
if ( ! ctx - > inputs [ 0 ] - > hw_frames_ctx ) {
av_log ( ctx , AV_LOG_ERROR , " No hw context provided on input \n " ) ;
return AVERROR ( EINVAL ) ;
}
in_frames_ctx = ( AVHWFramesContext * ) ctx - > inputs [ 0 ] - > hw_frames_ctx - > data ;
in_format = in_frames_ctx - > sw_format ;
out_format = ( s - > format = = AV_PIX_FMT_NONE ) ? in_format : s - > format ;
if ( ! format_is_supported ( in_format ) ) {
av_log ( ctx , AV_LOG_ERROR , " Unsupported input format: %s \n " ,
av_get_pix_fmt_name ( in_format ) ) ;
return AVERROR ( ENOSYS ) ;
}
if ( ! format_is_supported ( out_format ) ) {
av_log ( ctx , AV_LOG_ERROR , " Unsupported output format: %s \n " ,
av_get_pix_fmt_name ( out_format ) ) ;
return AVERROR ( ENOSYS ) ;
}
in_deinterleaved_format = get_deinterleaved_format ( in_format ) ;
out_deinterleaved_format = get_deinterleaved_format ( out_format ) ;
if ( in_deinterleaved_format = = AV_PIX_FMT_NONE | |
out_deinterleaved_format = = AV_PIX_FMT_NONE )
return AVERROR_BUG ;
/* figure out which stages need to be done */
if ( in_width ! = out_width | | in_height ! = out_height | |
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in_deinterleaved_format ! = out_deinterleaved_format ) {
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s - > stages [ STAGE_RESIZE ] . stage_needed = 1 ;
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if ( s - > interp_algo = = NPPI_INTER_SUPER & &
( out_width > in_width & & out_height > in_height ) ) {
s - > interp_algo = NPPI_INTER_LANCZOS ;
av_log ( ctx , AV_LOG_WARNING , " super-sampling not supported for output dimensions, using lanczos instead. \n " ) ;
}
if ( s - > interp_algo = = NPPI_INTER_SUPER & &
! ( out_width < in_width & & out_height < in_height ) ) {
s - > interp_algo = NPPI_INTER_CUBIC ;
av_log ( ctx , AV_LOG_WARNING , " super-sampling not supported for output dimensions, using cubic instead. \n " ) ;
}
}
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if ( ! s - > stages [ STAGE_RESIZE ] . stage_needed & & in_format = = out_format )
s - > passthrough = 1 ;
if ( ! s - > passthrough ) {
if ( in_format ! = in_deinterleaved_format )
s - > stages [ STAGE_DEINTERLEAVE ] . stage_needed = 1 ;
if ( out_format ! = out_deinterleaved_format )
s - > stages [ STAGE_INTERLEAVE ] . stage_needed = 1 ;
}
s - > stages [ STAGE_DEINTERLEAVE ] . in_fmt = in_format ;
s - > stages [ STAGE_DEINTERLEAVE ] . out_fmt = in_deinterleaved_format ;
s - > stages [ STAGE_DEINTERLEAVE ] . planes_in [ 0 ] . width = in_width ;
s - > stages [ STAGE_DEINTERLEAVE ] . planes_in [ 0 ] . height = in_height ;
s - > stages [ STAGE_RESIZE ] . in_fmt = in_deinterleaved_format ;
s - > stages [ STAGE_RESIZE ] . out_fmt = out_deinterleaved_format ;
s - > stages [ STAGE_RESIZE ] . planes_in [ 0 ] . width = in_width ;
s - > stages [ STAGE_RESIZE ] . planes_in [ 0 ] . height = in_height ;
s - > stages [ STAGE_RESIZE ] . planes_out [ 0 ] . width = out_width ;
s - > stages [ STAGE_RESIZE ] . planes_out [ 0 ] . height = out_height ;
s - > stages [ STAGE_INTERLEAVE ] . in_fmt = out_deinterleaved_format ;
s - > stages [ STAGE_INTERLEAVE ] . out_fmt = out_format ;
s - > stages [ STAGE_INTERLEAVE ] . planes_in [ 0 ] . width = out_width ;
s - > stages [ STAGE_INTERLEAVE ] . planes_in [ 0 ] . height = out_height ;
/* init the hardware contexts */
for ( i = 0 ; i < FF_ARRAY_ELEMS ( s - > stages ) ; i + + ) {
if ( ! s - > stages [ i ] . stage_needed )
continue ;
ret = init_stage ( & s - > stages [ i ] , in_frames_ctx - > device_ref ) ;
if ( ret < 0 )
return ret ;
last_stage = i ;
}
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if ( last_stage > = 0 )
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ctx - > outputs [ 0 ] - > hw_frames_ctx = av_buffer_ref ( s - > stages [ last_stage ] . frames_ctx ) ;
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else
ctx - > outputs [ 0 ] - > hw_frames_ctx = av_buffer_ref ( ctx - > inputs [ 0 ] - > hw_frames_ctx ) ;
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if ( ! ctx - > outputs [ 0 ] - > hw_frames_ctx )
return AVERROR ( ENOMEM ) ;
return 0 ;
}
static int nppscale_config_props ( AVFilterLink * outlink )
{
AVFilterContext * ctx = outlink - > src ;
AVFilterLink * inlink = outlink - > src - > inputs [ 0 ] ;
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NPPScaleContext * s = ctx - > priv ;
int w , h ;
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int ret ;
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if ( ( ret = ff_scale_eval_dimensions ( s ,
s - > w_expr , s - > h_expr ,
inlink , outlink ,
& w , & h ) ) < 0 )
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goto fail ;
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ff_scale_adjust_dimensions ( inlink , & w , & h ,
s - > force_original_aspect_ratio , s - > force_divisible_by ) ;
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if ( ( ( int64_t ) h * inlink - > w ) > INT_MAX | |
( ( int64_t ) w * inlink - > h ) > INT_MAX )
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av_log ( ctx , AV_LOG_ERROR , " Rescaled value for width or height is too big. \n " ) ;
outlink - > w = w ;
outlink - > h = h ;
ret = init_processing_chain ( ctx , inlink - > w , inlink - > h , w , h ) ;
if ( ret < 0 )
return ret ;
av_log ( ctx , AV_LOG_VERBOSE , " w:%d h:%d -> w:%d h:%d \n " ,
inlink - > w , inlink - > h , outlink - > w , outlink - > h ) ;
if ( inlink - > sample_aspect_ratio . num )
outlink - > sample_aspect_ratio = av_mul_q ( ( AVRational ) { outlink - > h * inlink - > w ,
outlink - > w * inlink - > h } ,
inlink - > sample_aspect_ratio ) ;
else
outlink - > sample_aspect_ratio = inlink - > sample_aspect_ratio ;
return 0 ;
fail :
return ret ;
}
static int nppscale_deinterleave ( AVFilterContext * ctx , NPPScaleStageContext * stage ,
AVFrame * out , AVFrame * in )
{
AVHWFramesContext * in_frames_ctx = ( AVHWFramesContext * ) in - > hw_frames_ctx - > data ;
NppStatus err ;
switch ( in_frames_ctx - > sw_format ) {
case AV_PIX_FMT_NV12 :
err = nppiYCbCr420_8u_P2P3R ( in - > data [ 0 ] , in - > linesize [ 0 ] ,
in - > data [ 1 ] , in - > linesize [ 1 ] ,
out - > data , out - > linesize ,
( NppiSize ) { in - > width , in - > height } ) ;
break ;
default :
return AVERROR_BUG ;
}
if ( err ! = NPP_SUCCESS ) {
av_log ( ctx , AV_LOG_ERROR , " NPP deinterleave error: %d \n " , err ) ;
return AVERROR_UNKNOWN ;
}
return 0 ;
}
static int nppscale_resize ( AVFilterContext * ctx , NPPScaleStageContext * stage ,
AVFrame * out , AVFrame * in )
{
NPPScaleContext * s = ctx - > priv ;
NppStatus err ;
int i ;
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for ( i = 0 ; i < FF_ARRAY_ELEMS ( stage - > planes_in ) & & i < FF_ARRAY_ELEMS ( in - > data ) & & in - > data [ i ] ; i + + ) {
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int iw = stage - > planes_in [ i ] . width ;
int ih = stage - > planes_in [ i ] . height ;
int ow = stage - > planes_out [ i ] . width ;
int oh = stage - > planes_out [ i ] . height ;
err = nppiResizeSqrPixel_8u_C1R ( in - > data [ i ] , ( NppiSize ) { iw , ih } ,
in - > linesize [ i ] , ( NppiRect ) { 0 , 0 , iw , ih } ,
out - > data [ i ] , out - > linesize [ i ] ,
( NppiRect ) { 0 , 0 , ow , oh } ,
( double ) ow / iw , ( double ) oh / ih ,
0.0 , 0.0 , s - > interp_algo ) ;
if ( err ! = NPP_SUCCESS ) {
av_log ( ctx , AV_LOG_ERROR , " NPP resize error: %d \n " , err ) ;
return AVERROR_UNKNOWN ;
}
}
return 0 ;
}
static int nppscale_interleave ( AVFilterContext * ctx , NPPScaleStageContext * stage ,
AVFrame * out , AVFrame * in )
{
AVHWFramesContext * out_frames_ctx = ( AVHWFramesContext * ) out - > hw_frames_ctx - > data ;
NppStatus err ;
switch ( out_frames_ctx - > sw_format ) {
case AV_PIX_FMT_NV12 :
err = nppiYCbCr420_8u_P3P2R ( ( const uint8_t * * ) in - > data ,
in - > linesize ,
out - > data [ 0 ] , out - > linesize [ 0 ] ,
out - > data [ 1 ] , out - > linesize [ 1 ] ,
( NppiSize ) { in - > width , in - > height } ) ;
break ;
default :
return AVERROR_BUG ;
}
if ( err ! = NPP_SUCCESS ) {
av_log ( ctx , AV_LOG_ERROR , " NPP deinterleave error: %d \n " , err ) ;
return AVERROR_UNKNOWN ;
}
return 0 ;
}
static int ( * const nppscale_process [ ] ) ( AVFilterContext * ctx , NPPScaleStageContext * stage ,
AVFrame * out , AVFrame * in ) = {
[ STAGE_DEINTERLEAVE ] = nppscale_deinterleave ,
[ STAGE_RESIZE ] = nppscale_resize ,
[ STAGE_INTERLEAVE ] = nppscale_interleave ,
} ;
static int nppscale_scale ( AVFilterContext * ctx , AVFrame * out , AVFrame * in )
{
NPPScaleContext * s = ctx - > priv ;
AVFrame * src = in ;
int i , ret , last_stage = - 1 ;
for ( i = 0 ; i < FF_ARRAY_ELEMS ( s - > stages ) ; i + + ) {
if ( ! s - > stages [ i ] . stage_needed )
continue ;
ret = nppscale_process [ i ] ( ctx , & s - > stages [ i ] , s - > stages [ i ] . frame , src ) ;
if ( ret < 0 )
return ret ;
src = s - > stages [ i ] . frame ;
last_stage = i ;
}
if ( last_stage < 0 )
return AVERROR_BUG ;
ret = av_hwframe_get_buffer ( src - > hw_frames_ctx , s - > tmp_frame , 0 ) ;
if ( ret < 0 )
return ret ;
av_frame_move_ref ( out , src ) ;
av_frame_move_ref ( src , s - > tmp_frame ) ;
ret = av_frame_copy_props ( out , in ) ;
if ( ret < 0 )
return ret ;
return 0 ;
}
static int nppscale_filter_frame ( AVFilterLink * link , AVFrame * in )
{
AVFilterContext * ctx = link - > dst ;
NPPScaleContext * s = ctx - > priv ;
AVFilterLink * outlink = ctx - > outputs [ 0 ] ;
AVHWFramesContext * frames_ctx = ( AVHWFramesContext * ) outlink - > hw_frames_ctx - > data ;
AVCUDADeviceContext * device_hwctx = frames_ctx - > device_ctx - > hwctx ;
AVFrame * out = NULL ;
CUcontext dummy ;
int ret = 0 ;
if ( s - > passthrough )
return ff_filter_frame ( outlink , in ) ;
out = av_frame_alloc ( ) ;
if ( ! out ) {
ret = AVERROR ( ENOMEM ) ;
goto fail ;
}
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ret = CHECK_CU ( device_hwctx - > internal - > cuda_dl - > cuCtxPushCurrent ( device_hwctx - > cuda_ctx ) ) ;
if ( ret < 0 )
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goto fail ;
ret = nppscale_scale ( ctx , out , in ) ;
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CHECK_CU ( device_hwctx - > internal - > cuda_dl - > cuCtxPopCurrent ( & dummy ) ) ;
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if ( ret < 0 )
goto fail ;
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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 ,
INT_MAX ) ;
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av_frame_free ( & in ) ;
return ff_filter_frame ( outlink , out ) ;
fail :
av_frame_free ( & in ) ;
av_frame_free ( & out ) ;
return ret ;
}
# define OFFSET(x) offsetof(NPPScaleContext, x)
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# define FLAGS (AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM)
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static const AVOption options [ ] = {
{ " w " , " Output video width " , OFFSET ( w_expr ) , AV_OPT_TYPE_STRING , { . str = " iw " } , . flags = FLAGS } ,
{ " h " , " Output video height " , OFFSET ( h_expr ) , AV_OPT_TYPE_STRING , { . str = " ih " } , . flags = FLAGS } ,
{ " format " , " Output pixel format " , OFFSET ( format_str ) , AV_OPT_TYPE_STRING , { . str = " same " } , . flags = FLAGS } ,
{ " interp_algo " , " Interpolation algorithm used for resizing " , OFFSET ( interp_algo ) , AV_OPT_TYPE_INT , { . i64 = NPPI_INTER_CUBIC } , 0 , INT_MAX , FLAGS , " interp_algo " } ,
{ " nn " , " nearest neighbour " , 0 , AV_OPT_TYPE_CONST , { . i64 = NPPI_INTER_NN } , 0 , 0 , FLAGS , " interp_algo " } ,
{ " linear " , " linear " , 0 , AV_OPT_TYPE_CONST , { . i64 = NPPI_INTER_LINEAR } , 0 , 0 , FLAGS , " interp_algo " } ,
{ " cubic " , " cubic " , 0 , AV_OPT_TYPE_CONST , { . i64 = NPPI_INTER_CUBIC } , 0 , 0 , FLAGS , " interp_algo " } ,
{ " cubic2p_bspline " , " 2-parameter cubic (B=1, C=0) " , 0 , AV_OPT_TYPE_CONST , { . i64 = NPPI_INTER_CUBIC2P_BSPLINE } , 0 , 0 , FLAGS , " interp_algo " } ,
{ " cubic2p_catmullrom " , " 2-parameter cubic (B=0, C=1/2) " , 0 , AV_OPT_TYPE_CONST , { . i64 = NPPI_INTER_CUBIC2P_CATMULLROM } , 0 , 0 , FLAGS , " interp_algo " } ,
{ " cubic2p_b05c03 " , " 2-parameter cubic (B=1/2, C=3/10) " , 0 , AV_OPT_TYPE_CONST , { . i64 = NPPI_INTER_CUBIC2P_B05C03 } , 0 , 0 , FLAGS , " interp_algo " } ,
{ " super " , " supersampling " , 0 , AV_OPT_TYPE_CONST , { . i64 = NPPI_INTER_SUPER } , 0 , 0 , FLAGS , " interp_algo " } ,
{ " lanczos " , " Lanczos " , 0 , AV_OPT_TYPE_CONST , { . i64 = NPPI_INTER_LANCZOS } , 0 , 0 , FLAGS , " interp_algo " } ,
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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 " } ,
{ " 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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{ NULL } ,
} ;
static const AVClass nppscale_class = {
. class_name = " nppscale " ,
. item_name = av_default_item_name ,
. option = options ,
. version = LIBAVUTIL_VERSION_INT ,
} ;
static const AVFilterPad nppscale_inputs [ ] = {
{
. name = " default " ,
. type = AVMEDIA_TYPE_VIDEO ,
. filter_frame = nppscale_filter_frame ,
} ,
} ;
static const AVFilterPad nppscale_outputs [ ] = {
{
. name = " default " ,
. type = AVMEDIA_TYPE_VIDEO ,
. config_props = nppscale_config_props ,
} ,
} ;
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const AVFilter ff_vf_scale_npp = {
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. name = " scale_npp " ,
. description = NULL_IF_CONFIG_SMALL ( " NVIDIA Performance Primitives video "
" scaling and format conversion " ) ,
. init = nppscale_init ,
. uninit = nppscale_uninit ,
. priv_size = sizeof ( NPPScaleContext ) ,
. priv_class = & nppscale_class ,
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FILTER_INPUTS ( nppscale_inputs ) ,
FILTER_OUTPUTS ( nppscale_outputs ) ,
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FILTER_QUERY_FUNC ( nppscale_query_formats ) ,
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. flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE ,
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} ;