LCOV - code coverage report
Current view: top level - libavfilter - vf_uspp.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 194 0.0 %
Date: 2017-12-17 04:34:43 Functions: 0 6 0.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
       3             :  * Copyright (c) 2014 Arwa Arif <arwaarif1994@gmail.com>
       4             :  *
       5             :  * This file is part of FFmpeg.
       6             :  *
       7             :  * FFmpeg is free software; you can redistribute it and/or modify
       8             :  * it under the terms of the GNU General Public License as published by
       9             :  * the Free Software Foundation; either version 2 of the License, or
      10             :  * (at your option) any later version.
      11             :  *
      12             :  * FFmpeg is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      15             :  * GNU General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU General Public License along
      18             :  * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
      19             :  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
      20             :  */
      21             : 
      22             : /**
      23             :  * @file
      24             :  * Ultra Slow/Simple Post-processing filter.
      25             :  *
      26             :  * Originally written by Michael Niedermayer for the MPlayer project, and
      27             :  * ported by Arwa Arif for FFmpeg.
      28             :  */
      29             : 
      30             : #include "libavutil/avassert.h"
      31             : #include "libavutil/imgutils.h"
      32             : #include "libavutil/opt.h"
      33             : #include "libavutil/pixdesc.h"
      34             : #include "internal.h"
      35             : #include "avfilter.h"
      36             : 
      37             : #define MAX_LEVEL 8 /* quality levels */
      38             : #define BLOCK 16
      39             : 
      40             : typedef struct USPPContext {
      41             :     const AVClass *av_class;
      42             :     int log2_count;
      43             :     int hsub, vsub;
      44             :     int qp;
      45             :     int qscale_type;
      46             :     int temp_stride[3];
      47             :     uint8_t *src[3];
      48             :     uint16_t *temp[3];
      49             :     int outbuf_size;
      50             :     uint8_t *outbuf;
      51             :     AVCodecContext *avctx_enc[BLOCK*BLOCK];
      52             :     AVFrame *frame;
      53             :     AVFrame *frame_dec;
      54             :     uint8_t *non_b_qp_table;
      55             :     int non_b_qp_alloc_size;
      56             :     int use_bframe_qp;
      57             : } USPPContext;
      58             : 
      59             : #define OFFSET(x) offsetof(USPPContext, x)
      60             : #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
      61             : static const AVOption uspp_options[] = {
      62             :     { "quality",       "set quality",                          OFFSET(log2_count),    AV_OPT_TYPE_INT, {.i64 = 3}, 0, MAX_LEVEL, FLAGS },
      63             :     { "qp",            "force a constant quantizer parameter", OFFSET(qp),            AV_OPT_TYPE_INT, {.i64 = 0}, 0, 63,        FLAGS },
      64             :     { "use_bframe_qp", "use B-frames' QP",                     OFFSET(use_bframe_qp), AV_OPT_TYPE_BOOL,{.i64 = 0}, 0, 1,         FLAGS },
      65             :     { NULL }
      66             : };
      67             : 
      68             : AVFILTER_DEFINE_CLASS(uspp);
      69             : 
      70             : DECLARE_ALIGNED(8, static const uint8_t, dither)[8][8] = {
      71             :     {  0*4,  48*4,  12*4,  60*4,   3*4,  51*4,  15*4,  63*4, },
      72             :     { 32*4,  16*4,  44*4,  28*4,  35*4,  19*4,  47*4,  31*4, },
      73             :     {  8*4,  56*4,   4*4,  52*4,  11*4,  59*4,   7*4,  55*4, },
      74             :     { 40*4,  24*4,  36*4,  20*4,  43*4,  27*4,  39*4,  23*4, },
      75             :     {  2*4,  50*4,  14*4,  62*4,   1*4,  49*4,  13*4,  61*4, },
      76             :     { 34*4,  18*4,  46*4,  30*4,  33*4,  17*4,  45*4,  29*4, },
      77             :     { 10*4,  58*4,   6*4,  54*4,   9*4,  57*4,   5*4,  53*4, },
      78             :     { 42*4,  26*4,  38*4,  22*4,  41*4,  25*4,  37*4,  21*4, },
      79             : };
      80             : 
      81             : static const uint8_t offset[511][2] = {
      82             :     { 0, 0},
      83             :     { 0, 0}, { 8, 8},                                                              // quality 1
      84             :     { 0, 0}, { 4, 4}, {12, 8}, { 8,12},                                            // quality 2
      85             :     { 0, 0}, {10, 2}, { 4, 4}, {14, 6}, { 8, 8}, { 2,10}, {12,12}, { 6,14},        // quality 3
      86             : 
      87             :     { 0, 0}, {10, 2}, { 4, 4}, {14, 6}, { 8, 8}, { 2,10}, {12,12}, { 6,14},
      88             :     { 5, 1}, {15, 3}, { 9, 5}, { 3, 7}, {13, 9}, { 7,11}, { 1,13}, {11,15},        // quality 4
      89             : 
      90             :     { 0, 0}, { 8, 0}, { 0, 8}, { 8, 8}, { 5, 1}, {13, 1}, { 5, 9}, {13, 9},
      91             :     { 2, 2}, {10, 2}, { 2,10}, {10,10}, { 7, 3}, {15, 3}, { 7,11}, {15,11},
      92             :     { 4, 4}, {12, 4}, { 4,12}, {12,12}, { 1, 5}, { 9, 5}, { 1,13}, { 9,13},
      93             :     { 6, 6}, {14, 6}, { 6,14}, {14,14}, { 3, 7}, {11, 7}, { 3,15}, {11,15},        // quality 5
      94             : 
      95             :     { 0, 0}, { 8, 0}, { 0, 8}, { 8, 8}, { 4, 0}, {12, 0}, { 4, 8}, {12, 8},
      96             :     { 1, 1}, { 9, 1}, { 1, 9}, { 9, 9}, { 5, 1}, {13, 1}, { 5, 9}, {13, 9},
      97             :     { 3, 2}, {11, 2}, { 3,10}, {11,10}, { 7, 2}, {15, 2}, { 7,10}, {15,10},
      98             :     { 2, 3}, {10, 3}, { 2,11}, {10,11}, { 6, 3}, {14, 3}, { 6,11}, {14,11},
      99             :     { 0, 4}, { 8, 4}, { 0,12}, { 8,12}, { 4, 4}, {12, 4}, { 4,12}, {12,12},
     100             :     { 1, 5}, { 9, 5}, { 1,13}, { 9,13}, { 5, 5}, {13, 5}, { 5,13}, {13,13},
     101             :     { 3, 6}, {11, 6}, { 3,14}, {11,14}, { 7, 6}, {15, 6}, { 7,14}, {15,14},
     102             :     { 2, 7}, {10, 7}, { 2,15}, {10,15}, { 6, 7}, {14, 7}, { 6,15}, {14,15},        // quality 6
     103             : 
     104             :     { 0, 0}, { 8, 0}, { 0, 8}, { 8, 8}, { 0, 2}, { 8, 2}, { 0,10}, { 8,10},
     105             :     { 0, 4}, { 8, 4}, { 0,12}, { 8,12}, { 0, 6}, { 8, 6}, { 0,14}, { 8,14},
     106             :     { 1, 1}, { 9, 1}, { 1, 9}, { 9, 9}, { 1, 3}, { 9, 3}, { 1,11}, { 9,11},
     107             :     { 1, 5}, { 9, 5}, { 1,13}, { 9,13}, { 1, 7}, { 9, 7}, { 1,15}, { 9,15},
     108             :     { 2, 0}, {10, 0}, { 2, 8}, {10, 8}, { 2, 2}, {10, 2}, { 2,10}, {10,10},
     109             :     { 2, 4}, {10, 4}, { 2,12}, {10,12}, { 2, 6}, {10, 6}, { 2,14}, {10,14},
     110             :     { 3, 1}, {11, 1}, { 3, 9}, {11, 9}, { 3, 3}, {11, 3}, { 3,11}, {11,11},
     111             :     { 3, 5}, {11, 5}, { 3,13}, {11,13}, { 3, 7}, {11, 7}, { 3,15}, {11,15},
     112             :     { 4, 0}, {12, 0}, { 4, 8}, {12, 8}, { 4, 2}, {12, 2}, { 4,10}, {12,10},
     113             :     { 4, 4}, {12, 4}, { 4,12}, {12,12}, { 4, 6}, {12, 6}, { 4,14}, {12,14},
     114             :     { 5, 1}, {13, 1}, { 5, 9}, {13, 9}, { 5, 3}, {13, 3}, { 5,11}, {13,11},
     115             :     { 5, 5}, {13, 5}, { 5,13}, {13,13}, { 5, 7}, {13, 7}, { 5,15}, {13,15},
     116             :     { 6, 0}, {14, 0}, { 6, 8}, {14, 8}, { 6, 2}, {14, 2}, { 6,10}, {14,10},
     117             :     { 6, 4}, {14, 4}, { 6,12}, {14,12}, { 6, 6}, {14, 6}, { 6,14}, {14,14},
     118             :     { 7, 1}, {15, 1}, { 7, 9}, {15, 9}, { 7, 3}, {15, 3}, { 7,11}, {15,11},
     119             :     { 7, 5}, {15, 5}, { 7,13}, {15,13}, { 7, 7}, {15, 7}, { 7,15}, {15,15},        // quality 7
     120             : 
     121             :     { 0, 0}, { 8, 0}, { 0, 8}, { 8, 8}, { 4, 4}, {12, 4}, { 4,12}, {12,12},
     122             :     { 0, 4}, { 8, 4}, { 0,12}, { 8,12}, { 4, 0}, {12, 0}, { 4, 8}, {12, 8},
     123             :     { 2, 2}, {10, 2}, { 2,10}, {10,10}, { 6, 6}, {14, 6}, { 6,14}, {14,14},
     124             :     { 2, 6}, {10, 6}, { 2,14}, {10,14}, { 6, 2}, {14, 2}, { 6,10}, {14,10},
     125             :     { 0, 2}, { 8, 2}, { 0,10}, { 8,10}, { 4, 6}, {12, 6}, { 4,14}, {12,14},
     126             :     { 0, 6}, { 8, 6}, { 0,14}, { 8,14}, { 4, 2}, {12, 2}, { 4,10}, {12,10},
     127             :     { 2, 0}, {10, 0}, { 2, 8}, {10, 8}, { 6, 4}, {14, 4}, { 6,12}, {14,12},
     128             :     { 2, 4}, {10, 4}, { 2,12}, {10,12}, { 6, 0}, {14, 0}, { 6, 8}, {14, 8},
     129             :     { 1, 1}, { 9, 1}, { 1, 9}, { 9, 9}, { 5, 5}, {13, 5}, { 5,13}, {13,13},
     130             :     { 1, 5}, { 9, 5}, { 1,13}, { 9,13}, { 5, 1}, {13, 1}, { 5, 9}, {13, 9},
     131             :     { 3, 3}, {11, 3}, { 3,11}, {11,11}, { 7, 7}, {15, 7}, { 7,15}, {15,15},
     132             :     { 3, 7}, {11, 7}, { 3,15}, {11,15}, { 7, 3}, {15, 3}, { 7,11}, {15,11},
     133             :     { 1, 3}, { 9, 3}, { 1,11}, { 9,11}, { 5, 7}, {13, 7}, { 5,15}, {13,15},
     134             :     { 1, 7}, { 9, 7}, { 1,15}, { 9,15}, { 5, 3}, {13, 3}, { 5,11}, {13,11},        // quality 8
     135             :     { 3, 1}, {11, 1}, { 3, 9}, {11, 9}, { 7, 5}, {15, 5}, { 7,13}, {15,13},
     136             :     { 3, 5}, {11, 5}, { 3,13}, {11,13}, { 7, 1}, {15, 1}, { 7, 9}, {15, 9},
     137             :     { 0, 1}, { 8, 1}, { 0, 9}, { 8, 9}, { 4, 5}, {12, 5}, { 4,13}, {12,13},
     138             :     { 0, 5}, { 8, 5}, { 0,13}, { 8,13}, { 4, 1}, {12, 1}, { 4, 9}, {12, 9},
     139             :     { 2, 3}, {10, 3}, { 2,11}, {10,11}, { 6, 7}, {14, 7}, { 6,15}, {14,15},
     140             :     { 2, 7}, {10, 7}, { 2,15}, {10,15}, { 6, 3}, {14, 3}, { 6,11}, {14,11},
     141             :     { 0, 3}, { 8, 3}, { 0,11}, { 8,11}, { 4, 7}, {12, 7}, { 4,15}, {12,15},
     142             :     { 0, 7}, { 8, 7}, { 0,15}, { 8,15}, { 4, 3}, {12, 3}, { 4,11}, {12,11},
     143             :     { 2, 1}, {10, 1}, { 2, 9}, {10, 9}, { 6, 5}, {14, 5}, { 6,13}, {14,13},
     144             :     { 2, 5}, {10, 5}, { 2,13}, {10,13}, { 6, 1}, {14, 1}, { 6, 9}, {14, 9},
     145             :     { 1, 0}, { 9, 0}, { 1, 8}, { 9, 8}, { 5, 4}, {13, 4}, { 5,12}, {13,12},
     146             :     { 1, 4}, { 9, 4}, { 1,12}, { 9,12}, { 5, 0}, {13, 0}, { 5, 8}, {13, 8},
     147             :     { 3, 2}, {11, 2}, { 3,10}, {11,10}, { 7, 6}, {15, 6}, { 7,14}, {15,14},
     148             :     { 3, 6}, {11, 6}, { 3,14}, {11,14}, { 7, 2}, {15, 2}, { 7,10}, {15,10},
     149             :     { 1, 2}, { 9, 2}, { 1,10}, { 9,10}, { 5, 6}, {13, 6}, { 5,14}, {13,14},
     150             :     { 1, 6}, { 9, 6}, { 1,14}, { 9,14}, { 5, 2}, {13, 2}, { 5,10}, {13,10},
     151             :     { 3, 0}, {11, 0}, { 3, 8}, {11, 8}, { 7, 4}, {15, 4}, { 7,12}, {15,12},
     152             :     { 3, 4}, {11, 4}, { 3,12}, {11,12}, { 7, 0}, {15, 0}, { 7, 8}, {15, 8},
     153             : };
     154             : 
     155           0 : static void store_slice_c(uint8_t *dst, const uint16_t *src,
     156             :                           int dst_stride, int src_stride,
     157             :                           int width, int height, int log2_scale)
     158             : {
     159             :     int y, x;
     160             : 
     161             : #define STORE(pos) do {                                                     \
     162             :     temp = ((src[x + y * src_stride + pos] << log2_scale) + d[pos]) >> 8;   \
     163             :     if (temp & 0x100) temp = ~(temp >> 31);                                 \
     164             :     dst[x + y * dst_stride + pos] = temp;                                   \
     165             : } while (0)
     166             : 
     167           0 :     for (y = 0; y < height; y++) {
     168           0 :         const uint8_t *d = dither[y&7];
     169           0 :         for (x = 0; x < width; x += 8) {
     170             :             int temp;
     171           0 :             STORE(0);
     172           0 :             STORE(1);
     173           0 :             STORE(2);
     174           0 :             STORE(3);
     175           0 :             STORE(4);
     176           0 :             STORE(5);
     177           0 :             STORE(6);
     178           0 :             STORE(7);
     179             :         }
     180             :     }
     181           0 : }
     182             : 
     183           0 : static void filter(USPPContext *p, uint8_t *dst[3], uint8_t *src[3],
     184             :                    int dst_stride[3], int src_stride[3], int width,
     185             :                    int height, uint8_t *qp_store, int qp_stride)
     186             : {
     187             :     int x, y, i, j;
     188           0 :     const int count = 1<<p->log2_count;
     189             :     int ret;
     190             : 
     191           0 :     for (i = 0; i < 3; i++) {
     192           0 :         int is_chroma = !!i;
     193           0 :         int w = AV_CEIL_RSHIFT(width,  is_chroma ? p->hsub : 0);
     194           0 :         int h = AV_CEIL_RSHIFT(height, is_chroma ? p->vsub : 0);
     195           0 :         int stride = p->temp_stride[i];
     196           0 :         int block = BLOCK >> (is_chroma ? p->hsub : 0);
     197             : 
     198           0 :         if (!src[i] || !dst[i])
     199           0 :             continue;
     200           0 :         for (y = 0; y < h; y++) {
     201           0 :             int index = block + block * stride + y * stride;
     202             : 
     203           0 :             memcpy(p->src[i] + index, src[i] + y * src_stride[i], w );
     204           0 :             for (x = 0; x < block; x++) {
     205           0 :                 p->src[i][index     - x - 1] = p->src[i][index +     x    ];
     206           0 :                 p->src[i][index + w + x    ] = p->src[i][index + w - x - 1];
     207             :             }
     208             :         }
     209           0 :         for (y = 0; y < block; y++) {
     210           0 :             memcpy(p->src[i] + (  block-1-y) * stride, p->src[i] + (  y+block  ) * stride, stride);
     211           0 :             memcpy(p->src[i] + (h+block  +y) * stride, p->src[i] + (h-y+block-1) * stride, stride);
     212             :         }
     213             : 
     214           0 :         p->frame->linesize[i] = stride;
     215           0 :         memset(p->temp[i], 0, (h + 2 * block) * stride * sizeof(int16_t));
     216             :     }
     217             : 
     218           0 :     if (p->qp)
     219           0 :         p->frame->quality = p->qp * FF_QP2LAMBDA;
     220             :     else {
     221           0 :         int qpsum=0;
     222           0 :         int qpcount = (height>>4) * (height>>4);
     223             : 
     224           0 :         for (y = 0; y < (height>>4); y++) {
     225           0 :             for (x = 0; x < (width>>4); x++)
     226           0 :                 qpsum += qp_store[x + y * qp_stride];
     227             :         }
     228           0 :         p->frame->quality = ff_norm_qscale((qpsum + qpcount/2) / qpcount, p->qscale_type) * FF_QP2LAMBDA;
     229             :     }
     230             : //    init per MB qscale stuff FIXME
     231           0 :     p->frame->height = height + BLOCK;
     232           0 :     p->frame->width  = width + BLOCK;
     233             : 
     234           0 :     for (i = 0; i < count; i++) {
     235           0 :         const int x1 = offset[i+count-1][0];
     236           0 :         const int y1 = offset[i+count-1][1];
     237           0 :         const int x1c = x1 >> p->hsub;
     238           0 :         const int y1c = y1 >> p->vsub;
     239           0 :         const int BLOCKc = BLOCK >> p->hsub;
     240             :         int offset;
     241           0 :         AVPacket pkt = {0};
     242             :         int got_pkt_ptr;
     243             : 
     244           0 :         av_init_packet(&pkt);
     245           0 :         pkt.data = p->outbuf;
     246           0 :         pkt.size = p->outbuf_size;
     247             : 
     248           0 :         p->frame->data[0] = p->src[0] + x1   + y1   * p->frame->linesize[0];
     249           0 :         p->frame->data[1] = p->src[1] + x1c  + y1c  * p->frame->linesize[1];
     250           0 :         p->frame->data[2] = p->src[2] + x1c  + y1c  * p->frame->linesize[2];
     251           0 :         p->frame->format  = p->avctx_enc[i]->pix_fmt;
     252             : 
     253           0 :         ret = avcodec_encode_video2(p->avctx_enc[i], &pkt, p->frame, &got_pkt_ptr);
     254           0 :         if (ret < 0) {
     255           0 :             av_log(p->avctx_enc[i], AV_LOG_ERROR, "Encoding failed\n");
     256           0 :             continue;
     257             :         }
     258             : 
     259           0 :         p->frame_dec = p->avctx_enc[i]->coded_frame;
     260             : 
     261           0 :         offset = (BLOCK-x1) + (BLOCK-y1) * p->frame_dec->linesize[0];
     262             : 
     263           0 :         for (y = 0; y < height; y++)
     264           0 :             for (x = 0; x < width; x++)
     265           0 :                 p->temp[0][x + y * p->temp_stride[0]] += p->frame_dec->data[0][x + y * p->frame_dec->linesize[0] + offset];
     266             : 
     267           0 :         if (!src[2] || !dst[2])
     268           0 :             continue;
     269             : 
     270           0 :         offset = (BLOCKc-x1c) + (BLOCKc-y1c) * p->frame_dec->linesize[1];
     271             : 
     272           0 :         for (y = 0; y < AV_CEIL_RSHIFT(height, p->vsub); y++) {
     273           0 :             for (x = 0; x < AV_CEIL_RSHIFT(width, p->hsub); x++) {
     274           0 :                 p->temp[1][x + y * p->temp_stride[1]] += p->frame_dec->data[1][x + y * p->frame_dec->linesize[1] + offset];
     275           0 :                 p->temp[2][x + y * p->temp_stride[2]] += p->frame_dec->data[2][x + y * p->frame_dec->linesize[2] + offset];
     276             :             }
     277             :         }
     278             :     }
     279             : 
     280           0 :     for (j = 0; j < 3; j++) {
     281           0 :         int is_chroma = !!j;
     282           0 :         if (!dst[j])
     283           0 :             continue;
     284           0 :         store_slice_c(dst[j], p->temp[j], dst_stride[j], p->temp_stride[j],
     285           0 :                       AV_CEIL_RSHIFT(width,  is_chroma ? p->hsub : 0),
     286           0 :                       AV_CEIL_RSHIFT(height, is_chroma ? p->vsub : 0),
     287           0 :                       8-p->log2_count);
     288             :     }
     289           0 : }
     290             : 
     291           0 : static int query_formats(AVFilterContext *ctx)
     292             : {
     293             :     static const enum AVPixelFormat pix_fmts[] = {
     294             :         AV_PIX_FMT_YUV444P,
     295             :         AV_PIX_FMT_YUV420P,
     296             :         AV_PIX_FMT_YUV410P,
     297             :         AV_PIX_FMT_YUVJ444P,
     298             :         AV_PIX_FMT_YUVJ420P,
     299             :         AV_PIX_FMT_GRAY8,
     300             :         AV_PIX_FMT_NONE
     301             :     };
     302             : 
     303           0 :     AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
     304           0 :     if (!fmts_list)
     305           0 :         return AVERROR(ENOMEM);
     306           0 :     return ff_set_common_formats(ctx, fmts_list);
     307             : }
     308             : 
     309           0 : static int config_input(AVFilterLink *inlink)
     310             : {
     311             : 
     312           0 :     AVFilterContext *ctx = inlink->dst;
     313           0 :     USPPContext *uspp = ctx->priv;
     314           0 :     const int height = inlink->h;
     315           0 :     const int width  = inlink->w;
     316           0 :     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
     317             :     int i;
     318             : 
     319           0 :     AVCodec *enc = avcodec_find_encoder(AV_CODEC_ID_SNOW);
     320           0 :     if (!enc) {
     321           0 :         av_log(ctx, AV_LOG_ERROR, "SNOW encoder not found.\n");
     322           0 :         return AVERROR(EINVAL);
     323             :     }
     324             : 
     325           0 :     uspp->hsub = desc->log2_chroma_w;
     326           0 :     uspp->vsub = desc->log2_chroma_h;
     327             : 
     328           0 :     for (i = 0; i < 3; i++) {
     329           0 :         int is_chroma = !!i;
     330           0 :         int w = (width  + 4 * BLOCK-1) & (~(2 * BLOCK-1));
     331           0 :         int h = (height + 4 * BLOCK-1) & (~(2 * BLOCK-1));
     332             : 
     333           0 :         if (is_chroma) {
     334           0 :             w = AV_CEIL_RSHIFT(w, uspp->hsub);
     335           0 :             h = AV_CEIL_RSHIFT(h, uspp->vsub);
     336             :         }
     337             : 
     338           0 :         uspp->temp_stride[i] = w;
     339           0 :         if (!(uspp->temp[i] = av_malloc_array(uspp->temp_stride[i], h * sizeof(int16_t))))
     340           0 :             return AVERROR(ENOMEM);
     341           0 :         if (!(uspp->src [i] = av_malloc_array(uspp->temp_stride[i], h * sizeof(uint8_t))))
     342           0 :             return AVERROR(ENOMEM);
     343             :     }
     344             : 
     345           0 :     for (i = 0; i < (1<<uspp->log2_count); i++) {
     346             :         AVCodecContext *avctx_enc;
     347           0 :         AVDictionary *opts = NULL;
     348             :         int ret;
     349             : 
     350           0 :         if (!(uspp->avctx_enc[i] = avcodec_alloc_context3(NULL)))
     351           0 :             return AVERROR(ENOMEM);
     352             : 
     353           0 :         avctx_enc = uspp->avctx_enc[i];
     354           0 :         avctx_enc->width = width + BLOCK;
     355           0 :         avctx_enc->height = height + BLOCK;
     356           0 :         avctx_enc->time_base = (AVRational){1,25};  // meaningless
     357           0 :         avctx_enc->gop_size = INT_MAX;
     358           0 :         avctx_enc->max_b_frames = 0;
     359           0 :         avctx_enc->pix_fmt = inlink->format;
     360           0 :         avctx_enc->flags = AV_CODEC_FLAG_QSCALE | AV_CODEC_FLAG_LOW_DELAY;
     361           0 :         avctx_enc->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;
     362           0 :         avctx_enc->global_quality = 123;
     363           0 :         av_dict_set(&opts, "no_bitstream", "1", 0);
     364           0 :         ret = avcodec_open2(avctx_enc, enc, &opts);
     365           0 :         if (ret < 0)
     366           0 :             return ret;
     367           0 :         av_dict_free(&opts);
     368           0 :         av_assert0(avctx_enc->codec);
     369             :     }
     370             : 
     371           0 :     uspp->outbuf_size = (width + BLOCK) * (height + BLOCK) * 10;
     372           0 :     if (!(uspp->frame = av_frame_alloc()))
     373           0 :         return AVERROR(ENOMEM);
     374           0 :     if (!(uspp->outbuf = av_malloc(uspp->outbuf_size)))
     375           0 :         return AVERROR(ENOMEM);
     376             : 
     377           0 :     return 0;
     378             : }
     379             : 
     380           0 : static int filter_frame(AVFilterLink *inlink, AVFrame *in)
     381             : {
     382           0 :     AVFilterContext *ctx = inlink->dst;
     383           0 :     USPPContext *uspp = ctx->priv;
     384           0 :     AVFilterLink *outlink = ctx->outputs[0];
     385           0 :     AVFrame *out = in;
     386             : 
     387           0 :     int qp_stride = 0;
     388           0 :     uint8_t *qp_table = NULL;
     389             : 
     390             :     /* if we are not in a constant user quantizer mode and we don't want to use
     391             :      * the quantizers from the B-frames (B-frames often have a higher QP), we
     392             :      * need to save the qp table from the last non B-frame; this is what the
     393             :      * following code block does */
     394           0 :     if (!uspp->qp) {
     395           0 :         qp_table = av_frame_get_qp_table(in, &qp_stride, &uspp->qscale_type);
     396             : 
     397           0 :         if (qp_table && !uspp->use_bframe_qp && in->pict_type != AV_PICTURE_TYPE_B) {
     398             :             int w, h;
     399             : 
     400             :             /* if the qp stride is not set, it means the QP are only defined on
     401             :              * a line basis */
     402           0 :             if (!qp_stride) {
     403           0 :                 w = AV_CEIL_RSHIFT(inlink->w, 4);
     404           0 :                 h = 1;
     405             :             } else {
     406           0 :                 w = qp_stride;
     407           0 :                 h = AV_CEIL_RSHIFT(inlink->h, 4);
     408             :             }
     409             : 
     410           0 :             if (w * h > uspp->non_b_qp_alloc_size) {
     411           0 :                 int ret = av_reallocp_array(&uspp->non_b_qp_table, w, h);
     412           0 :                 if (ret < 0) {
     413           0 :                     uspp->non_b_qp_alloc_size = 0;
     414           0 :                     return ret;
     415             :                 }
     416           0 :                 uspp->non_b_qp_alloc_size = w * h;
     417             :             }
     418             : 
     419           0 :             av_assert0(w * h <= uspp->non_b_qp_alloc_size);
     420           0 :             memcpy(uspp->non_b_qp_table, qp_table, w * h);
     421             :         }
     422             :     }
     423             : 
     424           0 :     if (uspp->log2_count && !ctx->is_disabled) {
     425           0 :         if (!uspp->use_bframe_qp && uspp->non_b_qp_table)
     426           0 :             qp_table = uspp->non_b_qp_table;
     427             : 
     428           0 :         if (qp_table || uspp->qp) {
     429             : 
     430             :             /* get a new frame if in-place is not possible or if the dimensions
     431             :              * are not multiple of 8 */
     432           0 :             if (!av_frame_is_writable(in) || (inlink->w & 7) || (inlink->h & 7)) {
     433           0 :                 const int aligned_w = FFALIGN(inlink->w, 8);
     434           0 :                 const int aligned_h = FFALIGN(inlink->h, 8);
     435             : 
     436           0 :                 out = ff_get_video_buffer(outlink, aligned_w, aligned_h);
     437           0 :                 if (!out) {
     438           0 :                     av_frame_free(&in);
     439           0 :                     return AVERROR(ENOMEM);
     440             :                 }
     441           0 :                 av_frame_copy_props(out, in);
     442           0 :                 out->width  = in->width;
     443           0 :                 out->height = in->height;
     444             :             }
     445             : 
     446           0 :             filter(uspp, out->data, in->data, out->linesize, in->linesize,
     447             :                    inlink->w, inlink->h, qp_table, qp_stride);
     448             :         }
     449             :     }
     450             : 
     451           0 :     if (in != out) {
     452           0 :         if (in->data[3])
     453           0 :             av_image_copy_plane(out->data[3], out->linesize[3],
     454           0 :                                 in ->data[3], in ->linesize[3],
     455             :                                 inlink->w, inlink->h);
     456           0 :         av_frame_free(&in);
     457             :     }
     458           0 :     return ff_filter_frame(outlink, out);
     459             : }
     460             : 
     461           0 : static av_cold void uninit(AVFilterContext *ctx)
     462             : {
     463           0 :     USPPContext *uspp = ctx->priv;
     464             :     int i;
     465             : 
     466           0 :     for (i = 0; i < 3; i++) {
     467           0 :         av_freep(&uspp->temp[i]);
     468           0 :         av_freep(&uspp->src[i]);
     469             :     }
     470             : 
     471           0 :     for (i = 0; i < (1 << uspp->log2_count); i++) {
     472           0 :         avcodec_close(uspp->avctx_enc[i]);
     473           0 :         av_freep(&uspp->avctx_enc[i]);
     474             :     }
     475             : 
     476           0 :     av_freep(&uspp->non_b_qp_table);
     477           0 :     av_freep(&uspp->outbuf);
     478           0 :     av_frame_free(&uspp->frame);
     479           0 : }
     480             : 
     481             : static const AVFilterPad uspp_inputs[] = {
     482             :     {
     483             :         .name         = "default",
     484             :         .type         = AVMEDIA_TYPE_VIDEO,
     485             :         .config_props = config_input,
     486             :         .filter_frame = filter_frame,
     487             :     },
     488             :     { NULL }
     489             : };
     490             : 
     491             : static const AVFilterPad uspp_outputs[] = {
     492             :     {
     493             :         .name = "default",
     494             :         .type = AVMEDIA_TYPE_VIDEO,
     495             :     },
     496             :     { NULL }
     497             : };
     498             : 
     499             : AVFilter ff_vf_uspp = {
     500             :     .name            = "uspp",
     501             :     .description     = NULL_IF_CONFIG_SMALL("Apply Ultra Simple / Slow Post-processing filter."),
     502             :     .priv_size       = sizeof(USPPContext),
     503             :     .uninit          = uninit,
     504             :     .query_formats   = query_formats,
     505             :     .inputs          = uspp_inputs,
     506             :     .outputs         = uspp_outputs,
     507             :     .priv_class      = &uspp_class,
     508             :     .flags           = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
     509             : };

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