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lavfi: USPP Filter

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Previous version reviewed by: Stefano Sabatini <stefasab@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Arwa Arif 2014-12-07 18:56:46 +05:30 committed by Michael Niedermayer
parent e2829a8175
commit 100fc395b6
5 changed files with 518 additions and 0 deletions
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1
configure vendored
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@ -2622,6 +2622,7 @@ vidstabtransform_filter_deps="libvidstab"
pixfmts_super2xsai_test_deps="super2xsai_filter"
tinterlace_merge_test_deps="tinterlace_filter"
tinterlace_pad_test_deps="tinterlace_filter"
uspp_filter_deps="gpl avcodec"
zmq_filter_deps="libzmq"
zoompan_filter_deps="swscale"

25
doc/filters.texi
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@ -8935,6 +8935,31 @@ unsharp=7:7:-2:7:7:-2
@end example
@end itemize
@section uspp
Apply ultra slow/simple postprocessing filter that compresses and decompresses
the image at several (or - in the case of @option{quality} level @code{8} - all)
shifts and average the results.
The way this differs from the behavior of spp is that uspp actually encodes &
decodes each case with libavcodec Snow, whereas spp uses a simplified intra only 8x8
DCT similar to MJPEG.
The filter accepts the following options:
@table @option
@item quality
Set quality. This option defines the number of levels for averaging. It accepts
an integer in the range 0-8. If set to @code{0}, the filter will have no
effect. A value of @code{8} means the higher quality. For each increment of
that value the speed drops by a factor of approximately 2. Default value is
@code{3}.
@item qp
Force a constant quantization parameter. If not set, the filter will use the QP
from the video stream (if available).
@end table
@anchor{vidstabdetect}
@section vidstabdetect

1
libavfilter/Makefile
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@ -193,6 +193,7 @@ OBJS-$(CONFIG_TINTERLACE_FILTER) += vf_tinterlace.o
OBJS-$(CONFIG_TRANSPOSE_FILTER) += vf_transpose.o
OBJS-$(CONFIG_TRIM_FILTER) += trim.o
OBJS-$(CONFIG_UNSHARP_FILTER) += vf_unsharp.o
OBJS-$(CONFIG_USPP_FILTER) += vf_uspp.o
OBJS-$(CONFIG_VFLIP_FILTER) += vf_vflip.o
OBJS-$(CONFIG_VIDSTABDETECT_FILTER) += vidstabutils.o vf_vidstabdetect.o
OBJS-$(CONFIG_VIDSTABTRANSFORM_FILTER) += vidstabutils.o vf_vidstabtransform.o

1
libavfilter/allfilters.c
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@ -208,6 +208,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(TRANSPOSE, transpose, vf);
REGISTER_FILTER(TRIM, trim, vf);
REGISTER_FILTER(UNSHARP, unsharp, vf);
REGISTER_FILTER(USPP, uspp, vf);
REGISTER_FILTER(VFLIP, vflip, vf);
REGISTER_FILTER(VIDSTABDETECT, vidstabdetect, vf);
REGISTER_FILTER(VIDSTABTRANSFORM, vidstabtransform, vf);

490
libavfilter/vf_uspp.c Normal file
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@ -0,0 +1,490 @@
/*
* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
* Copyright (c) 2014 Arwa Arif <arwaarif1994@gmail.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU 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.
*/
/**
* @file
* Ultra Slow/Simple Post-processing filter.
*
* Originally written by Michael Niedermayer for the MPlayer project, and
* ported by Arwa Arif for FFmpeg.
*/
#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "internal.h"
#include "libavcodec/avcodec.h"
#include "avfilter.h"
#define MAX_LEVEL 8 /* quality levels */
#define BLOCK 16
typedef struct {
const AVClass *av_class;
int log2_count;
int qp;
int qscale_type;
int temp_stride[3];
uint8_t *src[3];
int16_t *temp[3];
int outbuf_size;
uint8_t *outbuf;
AVCodecContext *avctx_enc[BLOCK*BLOCK];
AVFrame *frame;
AVFrame *frame_dec;
uint8_t *non_b_qp_table;
int non_b_qp_alloc_size;
int use_bframe_qp;
} USPPContext;
#define OFFSET(x) offsetof(USPPContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption uspp_options[] = {
{ "quality" , "set quality" , OFFSET(log2_count) , AV_OPT_TYPE_INT , {.i64 = 3} , 0 , MAX_LEVEL , FLAGS },
{ "qp" , "force a constant quantizer parameter" , OFFSET(qp) , AV_OPT_TYPE_INT , {.i64 = 0} , 0 , 63 , FLAGS },
{ "use_bframe_qp" , "use B-frames' QP" , OFFSET(use_bframe_qp) , AV_OPT_TYPE_INT , {.i64 = 0} , 0 , 1 , FLAGS },
{ NULL }
};
static const AVClass uspp_class = {
.class_name = "uspp",
.item_name = av_default_item_name,
.option = uspp_options,
.version = LIBAVUTIL_VERSION_INT,
.category = AV_CLASS_CATEGORY_FILTER,
};
//===========================================================================//
DECLARE_ALIGNED(8, static const uint8_t, dither)[8][8] = {
{ 0*4, 48*4, 12*4, 60*4, 3*4, 51*4, 15*4, 63*4, },
{ 32*4, 16*4, 44*4, 28*4, 35*4, 19*4, 47*4, 31*4, },
{ 8*4, 56*4, 4*4, 52*4, 11*4, 59*4, 7*4, 55*4, },
{ 40*4, 24*4, 36*4, 20*4, 43*4, 27*4, 39*4, 23*4, },
{ 2*4, 50*4, 14*4, 62*4, 1*4, 49*4, 13*4, 61*4, },
{ 34*4, 18*4, 46*4, 30*4, 33*4, 17*4, 45*4, 29*4, },
{ 10*4, 58*4, 6*4, 54*4, 9*4, 57*4, 5*4, 53*4, },
{ 42*4, 26*4, 38*4, 22*4, 41*4, 25*4, 37*4, 21*4, },
};
static const uint8_t offset[511][2]= {
{ 0, 0},
{ 0, 0}, { 8, 8}, // quality 1
{ 0, 0}, { 4, 4}, {12, 8}, { 8,12}, // quality 2
{ 0, 0}, {10, 2}, { 4, 4}, {14, 6}, { 8, 8}, { 2,10}, {12,12}, { 6,14}, // quality 3
{ 0, 0}, {10, 2}, { 4, 4}, {14, 6}, { 8, 8}, { 2,10}, {12,12}, { 6,14},
{ 5, 1}, {15, 3}, { 9, 5}, { 3, 7}, {13, 9}, { 7,11}, { 1,13}, {11,15}, // quality 4
{ 0, 0}, { 8, 0}, { 0, 8}, { 8, 8}, { 5, 1}, {13, 1}, { 5, 9}, {13, 9},
{ 2, 2}, {10, 2}, { 2,10}, {10,10}, { 7, 3}, {15, 3}, { 7,11}, {15,11},
{ 4, 4}, {12, 4}, { 4,12}, {12,12}, { 1, 5}, { 9, 5}, { 1,13}, { 9,13},
{ 6, 6}, {14, 6}, { 6,14}, {14,14}, { 3, 7}, {11, 7}, { 3,15}, {11,15}, // quality 5
{ 0, 0}, { 8, 0}, { 0, 8}, { 8, 8}, { 4, 0}, {12, 0}, { 4, 8}, {12, 8},
{ 1, 1}, { 9, 1}, { 1, 9}, { 9, 9}, { 5, 1}, {13, 1}, { 5, 9}, {13, 9},
{ 3, 2}, {11, 2}, { 3,10}, {11,10}, { 7, 2}, {15, 2}, { 7,10}, {15,10},
{ 2, 3}, {10, 3}, { 2,11}, {10,11}, { 6, 3}, {14, 3}, { 6,11}, {14,11},
{ 0, 4}, { 8, 4}, { 0,12}, { 8,12}, { 4, 4}, {12, 4}, { 4,12}, {12,12},
{ 1, 5}, { 9, 5}, { 1,13}, { 9,13}, { 5, 5}, {13, 5}, { 5,13}, {13,13},
{ 3, 6}, {11, 6}, { 3,14}, {11,14}, { 7, 6}, {15, 6}, { 7,14}, {15,14},
{ 2, 7}, {10, 7}, { 2,15}, {10,15}, { 6, 7}, {14, 7}, { 6,15}, {14,15}, // quality 6
{ 0, 0}, { 8, 0}, { 0, 8}, { 8, 8}, { 0, 2}, { 8, 2}, { 0,10}, { 8,10},
{ 0, 4}, { 8, 4}, { 0,12}, { 8,12}, { 0, 6}, { 8, 6}, { 0,14}, { 8,14},
{ 1, 1}, { 9, 1}, { 1, 9}, { 9, 9}, { 1, 3}, { 9, 3}, { 1,11}, { 9,11},
{ 1, 5}, { 9, 5}, { 1,13}, { 9,13}, { 1, 7}, { 9, 7}, { 1,15}, { 9,15},
{ 2, 0}, {10, 0}, { 2, 8}, {10, 8}, { 2, 2}, {10, 2}, { 2,10}, {10,10},
{ 2, 4}, {10, 4}, { 2,12}, {10,12}, { 2, 6}, {10, 6}, { 2,14}, {10,14},
{ 3, 1}, {11, 1}, { 3, 9}, {11, 9}, { 3, 3}, {11, 3}, { 3,11}, {11,11},
{ 3, 5}, {11, 5}, { 3,13}, {11,13}, { 3, 7}, {11, 7}, { 3,15}, {11,15},
{ 4, 0}, {12, 0}, { 4, 8}, {12, 8}, { 4, 2}, {12, 2}, { 4,10}, {12,10},
{ 4, 4}, {12, 4}, { 4,12}, {12,12}, { 4, 6}, {12, 6}, { 4,14}, {12,14},
{ 5, 1}, {13, 1}, { 5, 9}, {13, 9}, { 5, 3}, {13, 3}, { 5,11}, {13,11},
{ 5, 5}, {13, 5}, { 5,13}, {13,13}, { 5, 7}, {13, 7}, { 5,15}, {13,15},
{ 6, 0}, {14, 0}, { 6, 8}, {14, 8}, { 6, 2}, {14, 2}, { 6,10}, {14,10},
{ 6, 4}, {14, 4}, { 6,12}, {14,12}, { 6, 6}, {14, 6}, { 6,14}, {14,14},
{ 7, 1}, {15, 1}, { 7, 9}, {15, 9}, { 7, 3}, {15, 3}, { 7,11}, {15,11},
{ 7, 5}, {15, 5}, { 7,13}, {15,13}, { 7, 7}, {15, 7}, { 7,15}, {15,15}, // quality 7
{ 0, 0}, { 8, 0}, { 0, 8}, { 8, 8}, { 4, 4}, {12, 4}, { 4,12}, {12,12},
{ 0, 4}, { 8, 4}, { 0,12}, { 8,12}, { 4, 0}, {12, 0}, { 4, 8}, {12, 8},
{ 2, 2}, {10, 2}, { 2,10}, {10,10}, { 6, 6}, {14, 6}, { 6,14}, {14,14},
{ 2, 6}, {10, 6}, { 2,14}, {10,14}, { 6, 2}, {14, 2}, { 6,10}, {14,10},
{ 0, 2}, { 8, 2}, { 0,10}, { 8,10}, { 4, 6}, {12, 6}, { 4,14}, {12,14},
{ 0, 6}, { 8, 6}, { 0,14}, { 8,14}, { 4, 2}, {12, 2}, { 4,10}, {12,10},
{ 2, 0}, {10, 0}, { 2, 8}, {10, 8}, { 6, 4}, {14, 4}, { 6,12}, {14,12},
{ 2, 4}, {10, 4}, { 2,12}, {10,12}, { 6, 0}, {14, 0}, { 6, 8}, {14, 8},
{ 1, 1}, { 9, 1}, { 1, 9}, { 9, 9}, { 5, 5}, {13, 5}, { 5,13}, {13,13},
{ 1, 5}, { 9, 5}, { 1,13}, { 9,13}, { 5, 1}, {13, 1}, { 5, 9}, {13, 9},
{ 3, 3}, {11, 3}, { 3,11}, {11,11}, { 7, 7}, {15, 7}, { 7,15}, {15,15},
{ 3, 7}, {11, 7}, { 3,15}, {11,15}, { 7, 3}, {15, 3}, { 7,11}, {15,11},
{ 1, 3}, { 9, 3}, { 1,11}, { 9,11}, { 5, 7}, {13, 7}, { 5,15}, {13,15},
{ 1, 7}, { 9, 7}, { 1,15}, { 9,15}, { 5, 3}, {13, 3}, { 5,11}, {13,11}, // quality 8
{ 3, 1}, {11, 1}, { 3, 9}, {11, 9}, { 7, 5}, {15, 5}, { 7,13}, {15,13},
{ 3, 5}, {11, 5}, { 3,13}, {11,13}, { 7, 1}, {15, 1}, { 7, 9}, {15, 9},
{ 0, 1}, { 8, 1}, { 0, 9}, { 8, 9}, { 4, 5}, {12, 5}, { 4,13}, {12,13},
{ 0, 5}, { 8, 5}, { 0,13}, { 8,13}, { 4, 1}, {12, 1}, { 4, 9}, {12, 9},
{ 2, 3}, {10, 3}, { 2,11}, {10,11}, { 6, 7}, {14, 7}, { 6,15}, {14,15},
{ 2, 7}, {10, 7}, { 2,15}, {10,15}, { 6, 3}, {14, 3}, { 6,11}, {14,11},
{ 0, 3}, { 8, 3}, { 0,11}, { 8,11}, { 4, 7}, {12, 7}, { 4,15}, {12,15},
{ 0, 7}, { 8, 7}, { 0,15}, { 8,15}, { 4, 3}, {12, 3}, { 4,11}, {12,11},
{ 2, 1}, {10, 1}, { 2, 9}, {10, 9}, { 6, 5}, {14, 5}, { 6,13}, {14,13},
{ 2, 5}, {10, 5}, { 2,13}, {10,13}, { 6, 1}, {14, 1}, { 6, 9}, {14, 9},
{ 1, 0}, { 9, 0}, { 1, 8}, { 9, 8}, { 5, 4}, {13, 4}, { 5,12}, {13,12},
{ 1, 4}, { 9, 4}, { 1,12}, { 9,12}, { 5, 0}, {13, 0}, { 5, 8}, {13, 8},
{ 3, 2}, {11, 2}, { 3,10}, {11,10}, { 7, 6}, {15, 6}, { 7,14}, {15,14},
{ 3, 6}, {11, 6}, { 3,14}, {11,14}, { 7, 2}, {15, 2}, { 7,10}, {15,10},
{ 1, 2}, { 9, 2}, { 1,10}, { 9,10}, { 5, 6}, {13, 6}, { 5,14}, {13,14},
{ 1, 6}, { 9, 6}, { 1,14}, { 9,14}, { 5, 2}, {13, 2}, { 5,10}, {13,10},
{ 3, 0}, {11, 0}, { 3, 8}, {11, 8}, { 7, 4}, {15, 4}, { 7,12}, {15,12},
{ 3, 4}, {11, 4}, { 3,12}, {11,12}, { 7, 0}, {15, 0}, { 7, 8}, {15, 8},
};
static void store_slice_c(uint8_t *dst, int16_t *src,
int dst_stride, int src_stride,
int width, int height, int log2_scale )
{
int y, x;
#define STORE(pos) do { \
temp = ((src[x + y * src_stride + pos] << log2_scale) + d[pos]) >> 8; \
if (temp & 0x100) temp = ~(temp >> 31); \
dst[x + y * dst_stride + pos] = temp; \
} while (0);
for (y = 0 ; y < height ; y++) {
const uint8_t *d = dither[y&7];
for (x = 0 ; x < width ; x += 8) {
int temp;
STORE(0);
STORE(1);
STORE(2);
STORE(3);
STORE(4);
STORE(5);
STORE(6);
STORE(7);
}
}
}
static inline int norm_qscale(int qscale, int type)
{
switch (type) {
case FF_QSCALE_TYPE_MPEG1: return qscale;
case FF_QSCALE_TYPE_MPEG2: return qscale >> 1;
case FF_QSCALE_TYPE_H264: return qscale >> 2;
case FF_QSCALE_TYPE_VP56: return (63 - qscale + 2) >> 2;
}
return qscale;
}
static void filter(USPPContext *p, uint8_t *dst[3], uint8_t *src[3],
int dst_stride[3], int src_stride[3], int width,
int height, uint8_t *qp_store, int qp_stride)
{
int x, y, i, j;
const int count = 1<<p->log2_count;
for (i = 0 ; i < 3 ; i++) {
int is_chroma = !!i;
int w = width >> is_chroma;
int h = height >> is_chroma;
int stride = p->temp_stride[i];
int block = BLOCK >> is_chroma;
if (!src[i] || !dst[i])
continue;
for (y = 0 ; y < h ; y++) {
int index = block + block * stride + y * stride;
memcpy( p->src[i] + index , src[i] + y * src_stride[i] , w );
for (x = 0 ; x < block ; x++) {
p->src[i][index - x - 1]= p->src[i][index + x ];
p->src[i][index + w + x ]= p->src[i][index + w - x - 1];
}
}
for (y = 0 ; y < block ; y++){
memcpy(p->src[i] + ( block-1-y) * stride , p->src[i] + ( y+block ) * stride , stride);
memcpy(p->src[i] + (h+block +y) * stride , p->src[i] + (h-y+block-1) * stride , stride);
}
p->frame->linesize[i] = stride;
memset(p->temp[i] , 0 , (h + 2 * block) * stride * sizeof(int16_t));
}
if (p->qp)
p->frame->quality = p->qp * FF_QP2LAMBDA;
else
p->frame->quality = norm_qscale(qp_store[0] , p->qscale_type) * FF_QP2LAMBDA;
// init per MB qscale stuff FIXME
p->frame->height = height;
p->frame->width = width;
for (i = 0 ; i < count ; i++) {
const int x1 = offset[i+count-1][0];
const int y1 = offset[i+count-1][1];
int offset;
AVPacket pkt;
int got_pkt_ptr;
av_init_packet(&pkt);
pkt.data = p->outbuf;
pkt.size = p->outbuf_size;
p->frame->data[0] = p->src[0] + x1 + y1 * p->frame->linesize[0];
p->frame->data[1] = p->src[1] + x1/2 + y1/2 * p->frame->linesize[1];
p->frame->data[2] = p->src[2] + x1/2 + y1/2 * p->frame->linesize[2];
p->frame->format = p->avctx_enc[i]->pix_fmt;
avcodec_encode_video2(p->avctx_enc[i] , &pkt , p->frame , &got_pkt_ptr);
p->frame_dec = p->avctx_enc[i]->coded_frame;
offset = (BLOCK-x1) + (BLOCK-y1) * p->frame_dec->linesize[0];
for (y = 0 ; y < height ; y++)
for (x = 0 ; x < width ; x++)
p->temp[0][ x + y * p->temp_stride[0] ] += p->frame_dec->data[0][ x + y * p->frame_dec->linesize[0] + offset ];
offset = (BLOCK/2-x1/2) + (BLOCK/2-y1/2) * p->frame_dec->linesize[1];
for (y = 0 ; y < height/2 ; y++) {
for (x = 0; x < width/2 ; x++) {
p->temp[1][ x + y * p->temp_stride[1] ] += p->frame_dec->data[1][ x + y * p->frame_dec->linesize[1] + offset ];
p->temp[2][ x + y * p->temp_stride[2] ] += p->frame_dec->data[2][ x + y * p->frame_dec->linesize[2] + offset ];
}
}
}
for (j = 0 ; j < 3 ; j++) {
int is_chroma = !!j;
if (!dst[j])
continue;
store_slice_c(dst[j] , p->temp[j] , dst_stride[j] , p->temp_stride[j] ,
width >> is_chroma , height >> is_chroma , 8-p->log2_count);
}
}
static int query_formats(AVFilterContext *ctx)
{
static const enum PixelFormat pix_fmts[] = {
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P,
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P,
AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P,
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ440P,
AV_PIX_FMT_NONE
};
ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
return 0;
}
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
USPPContext *uspp = ctx->priv;
const int height = inlink->h;
const int width = inlink->w;
int i;
AVCodec *enc = avcodec_find_encoder(AV_CODEC_ID_SNOW);
if(!enc)
{
av_log(ctx, AV_LOG_ERROR, "SNOW encoder not found.\n");
return AVERROR(EINVAL);
}
if (!uspp->use_bframe_qp) {
/* we are assuming here the qp blocks will not be smaller that 16x16 */
uspp->non_b_qp_alloc_size = FF_CEIL_RSHIFT(width, 4) * FF_CEIL_RSHIFT(height, 4);
uspp->non_b_qp_table = av_calloc(uspp->non_b_qp_alloc_size, sizeof(*uspp->non_b_qp_table));
if (!uspp->non_b_qp_table)
return AVERROR(ENOMEM);
}
for (i = 0 ; i < 3; i++) {
int is_chroma = !!i;
int w = ((width + 4 * BLOCK-1) & (~(2 * BLOCK-1))) >> is_chroma;
int h = ((height + 4 * BLOCK-1) & (~(2 * BLOCK-1))) >> is_chroma;
uspp->temp_stride[i] = w;
if (!(uspp->temp[i] = av_malloc(uspp->temp_stride[i] * h * sizeof(int16_t))))
return AVERROR(ENOMEM);
if (!(uspp->src [i] = av_malloc(uspp->temp_stride[i] * h * sizeof(uint8_t))))
return AVERROR(ENOMEM);
}
for (i = 0 ; i < (1<<uspp->log2_count) ; i++) {
AVCodecContext *avctx_enc;
AVDictionary *opts = NULL;
int ret;
if (!(uspp->avctx_enc[i] = avcodec_alloc_context3(NULL)))
return AVERROR(ENOMEM);
avctx_enc = uspp->avctx_enc[i];
avctx_enc->width = width + BLOCK;
avctx_enc->height = height + BLOCK;
avctx_enc->time_base = (AVRational){1,25}; // meaningless
avctx_enc->gop_size = 300;
avctx_enc->max_b_frames = 0;
avctx_enc->pix_fmt = AV_PIX_FMT_YUV420P;
avctx_enc->flags = CODEC_FLAG_QSCALE | CODEC_FLAG_LOW_DELAY;
avctx_enc->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
avctx_enc->global_quality = 123;
av_dict_set(&opts, "no_bitstream", "1", 0);
ret = avcodec_open2(avctx_enc, enc, &opts);
if (ret < 0)
return ret;
av_dict_free(&opts);
av_assert0(avctx_enc->codec);
}
uspp->outbuf_size = (width + BLOCK) * (height + BLOCK) * 10;
if (!(uspp->frame = av_frame_alloc()))
return AVERROR(ENOMEM);
if (!(uspp->outbuf = av_malloc(uspp->outbuf_size)))
return AVERROR(ENOMEM);
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
USPPContext *uspp = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out = in;
int qp_stride = 0;
uint8_t *qp_table = NULL;
/* if we are not in a constant user quantizer mode and we don't want to use
* the quantizers from the B-frames (B-frames often have a higher QP), we
* need to save the qp table from the last non B-frame; this is what the
* following code block does */
if (!uspp->qp) {
qp_table = av_frame_get_qp_table(in, &qp_stride, &uspp->qscale_type);
if (qp_table && !uspp->use_bframe_qp && in->pict_type != AV_PICTURE_TYPE_B) {
int w, h;
/* if the qp stride is not set, it means the QP are only defined on
* a line basis */
if (!qp_stride) {
w = FF_CEIL_RSHIFT(inlink->w, 4);
h = 1;
} else {
w = FF_CEIL_RSHIFT(qp_stride, 4);
h = FF_CEIL_RSHIFT(inlink->h, 4);
}
av_assert0(w * h <= uspp->non_b_qp_alloc_size);
memcpy(uspp->non_b_qp_table , qp_table , w * h);
}
}
if (uspp->log2_count && !ctx->is_disabled) {
if (!uspp->use_bframe_qp && uspp->non_b_qp_table)
qp_table = uspp->non_b_qp_table;
if (qp_table || uspp->qp) {
/* get a new frame if in-place is not possible or if the dimensions
* are not multiple of 8 */
if (!av_frame_is_writable(in) || (inlink->w & 7) || (inlink->h & 7)) {
const int aligned_w = FFALIGN(inlink->w, 8);
const int aligned_h = FFALIGN(inlink->h, 8);
out = ff_get_video_buffer(outlink, aligned_w, aligned_h);
if (!out) {
av_frame_free(&in);
return AVERROR(ENOMEM);
}
av_frame_copy_props(out, in);
out->width = in->width;
out->height = in->height;
}
filter(uspp , out->data , in->data , out->linesize , in->linesize , inlink->w , inlink->h , qp_table , qp_stride);
}
}
if (in != out) {
if (in->data[3])
av_image_copy_plane(out->data[3], out->linesize[3],
in ->data[3], in ->linesize[3],
inlink->w, inlink->h);
av_frame_free(&in);
}
return ff_filter_frame(outlink, out);
}
static av_cold void uninit(AVFilterContext *ctx)
{
USPPContext *uspp = ctx->priv;
int i;
for (i = 0 ; i < 3 ; i++) {
av_freep(&uspp->temp[i]);
av_freep(&uspp->src[i]);
}
for (i = 0 ; i < (1 << uspp->log2_count) ; i++) {
avcodec_close(uspp->avctx_enc[i]);
av_freep(&uspp->avctx_enc[i]);
}
av_freep(&uspp->non_b_qp_table);
av_freep(&uspp->outbuf);
av_frame_free(&uspp->frame);
}
static const AVFilterPad uspp_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input,
.filter_frame = filter_frame,
},
{ NULL }
};
static const AVFilterPad uspp_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
AVFilter ff_vf_uspp = {
.name = "uspp",
.description = NULL_IF_CONFIG_SMALL("Apply Ultra Simple / Slow Post-processing filter."),
.priv_size = sizeof(USPPContext),
.uninit = uninit,
.query_formats = query_formats,
.inputs = uspp_inputs,
.outputs = uspp_outputs,
.priv_class = &uspp_class,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
};