@@ -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"

@@ -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

@@ -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

@@ -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);

new file mode 100644

@@ -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,

+};