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FFmpeg/libavfilter/vf_uspp.c

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  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 "libavcodec/avcodec.h"

  36. #include "avfilter.h"

  37. 

  38. #define MAX_LEVEL 8 /* quality levels */

  39. #define BLOCK 16

  40. 

  41. typedef struct {

  42.     const AVClass *av_class;

  43.     int log2_count;

  44.     int hsub, vsub;

  45.     int qp;

  46.     int qscale_type;

  47.     int temp_stride[3];

  48.     uint8_t *src[3];

  49.     uint16_t *temp[3];

  50.     int outbuf_size;

  51.     uint8_t *outbuf;

  52.     AVCodecContext *avctx_enc[BLOCK*BLOCK];

  53.     AVFrame *frame;

  54.     AVFrame *frame_dec;

  55.     uint8_t *non_b_qp_table;

  56.     int non_b_qp_alloc_size;

  57.     int use_bframe_qp;

  58. } USPPContext;

  59. 

  60. #define OFFSET(x) offsetof(USPPContext, x)

  61. #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

  62. static const AVOption uspp_options[] = {

  63.     { "quality",       "set quality",                          OFFSET(log2_count),    AV_OPT_TYPE_INT, {.i64 = 3}, 0, MAX_LEVEL, FLAGS },

  64.     { "qp",            "force a constant quantizer parameter", OFFSET(qp),            AV_OPT_TYPE_INT, {.i64 = 0}, 0, 63,        FLAGS },

  65.     { "use_bframe_qp", "use B-frames' QP",                     OFFSET(use_bframe_qp), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1,         FLAGS },

  66.     { NULL }

  67. };

  68. 

  69. AVFILTER_DEFINE_CLASS(uspp);

  70. 

  71. DECLARE_ALIGNED(8, static const uint8_t, dither)[8][8] = {

  72.     {  0*4,  48*4,  12*4,  60*4,   3*4,  51*4,  15*4,  63*4, },

  73.     { 32*4,  16*4,  44*4,  28*4,  35*4,  19*4,  47*4,  31*4, },

  74.     {  8*4,  56*4,   4*4,  52*4,  11*4,  59*4,   7*4,  55*4, },

  75.     { 40*4,  24*4,  36*4,  20*4,  43*4,  27*4,  39*4,  23*4, },

  76.     {  2*4,  50*4,  14*4,  62*4,   1*4,  49*4,  13*4,  61*4, },

  77.     { 34*4,  18*4,  46*4,  30*4,  33*4,  17*4,  45*4,  29*4, },

  78.     { 10*4,  58*4,   6*4,  54*4,   9*4,  57*4,   5*4,  53*4, },

  79.     { 42*4,  26*4,  38*4,  22*4,  41*4,  25*4,  37*4,  21*4, },

  80. };

  81. 

  82. static const uint8_t offset[511][2] = {

  83.     { 0, 0},

  84.     { 0, 0}, { 8, 8},                                                              // quality 1

  85.     { 0, 0}, { 4, 4}, {12, 8}, { 8,12},                                            // quality 2

  86.     { 0, 0}, {10, 2}, { 4, 4}, {14, 6}, { 8, 8}, { 2,10}, {12,12}, { 6,14},        // quality 3

  87. 

  88.     { 0, 0}, {10, 2}, { 4, 4}, {14, 6}, { 8, 8}, { 2,10}, {12,12}, { 6,14},

  89.     { 5, 1}, {15, 3}, { 9, 5}, { 3, 7}, {13, 9}, { 7,11}, { 1,13}, {11,15},        // quality 4

  90. 

  91.     { 0, 0}, { 8, 0}, { 0, 8}, { 8, 8}, { 5, 1}, {13, 1}, { 5, 9}, {13, 9},

  92.     { 2, 2}, {10, 2}, { 2,10}, {10,10}, { 7, 3}, {15, 3}, { 7,11}, {15,11},

  93.     { 4, 4}, {12, 4}, { 4,12}, {12,12}, { 1, 5}, { 9, 5}, { 1,13}, { 9,13},

  94.     { 6, 6}, {14, 6}, { 6,14}, {14,14}, { 3, 7}, {11, 7}, { 3,15}, {11,15},        // quality 5

  95. 

  96.     { 0, 0}, { 8, 0}, { 0, 8}, { 8, 8}, { 4, 0}, {12, 0}, { 4, 8}, {12, 8},

  97.     { 1, 1}, { 9, 1}, { 1, 9}, { 9, 9}, { 5, 1}, {13, 1}, { 5, 9}, {13, 9},

  98.     { 3, 2}, {11, 2}, { 3,10}, {11,10}, { 7, 2}, {15, 2}, { 7,10}, {15,10},

  99.     { 2, 3}, {10, 3}, { 2,11}, {10,11}, { 6, 3}, {14, 3}, { 6,11}, {14,11},

  100.     { 0, 4}, { 8, 4}, { 0,12}, { 8,12}, { 4, 4}, {12, 4}, { 4,12}, {12,12},

  101.     { 1, 5}, { 9, 5}, { 1,13}, { 9,13}, { 5, 5}, {13, 5}, { 5,13}, {13,13},

  102.     { 3, 6}, {11, 6}, { 3,14}, {11,14}, { 7, 6}, {15, 6}, { 7,14}, {15,14},

  103.     { 2, 7}, {10, 7}, { 2,15}, {10,15}, { 6, 7}, {14, 7}, { 6,15}, {14,15},        // quality 6

  104. 

  105.     { 0, 0}, { 8, 0}, { 0, 8}, { 8, 8}, { 0, 2}, { 8, 2}, { 0,10}, { 8,10},

  106.     { 0, 4}, { 8, 4}, { 0,12}, { 8,12}, { 0, 6}, { 8, 6}, { 0,14}, { 8,14},

  107.     { 1, 1}, { 9, 1}, { 1, 9}, { 9, 9}, { 1, 3}, { 9, 3}, { 1,11}, { 9,11},

  108.     { 1, 5}, { 9, 5}, { 1,13}, { 9,13}, { 1, 7}, { 9, 7}, { 1,15}, { 9,15},

  109.     { 2, 0}, {10, 0}, { 2, 8}, {10, 8}, { 2, 2}, {10, 2}, { 2,10}, {10,10},

  110.     { 2, 4}, {10, 4}, { 2,12}, {10,12}, { 2, 6}, {10, 6}, { 2,14}, {10,14},

  111.     { 3, 1}, {11, 1}, { 3, 9}, {11, 9}, { 3, 3}, {11, 3}, { 3,11}, {11,11},

  112.     { 3, 5}, {11, 5}, { 3,13}, {11,13}, { 3, 7}, {11, 7}, { 3,15}, {11,15},

  113.     { 4, 0}, {12, 0}, { 4, 8}, {12, 8}, { 4, 2}, {12, 2}, { 4,10}, {12,10},

  114.     { 4, 4}, {12, 4}, { 4,12}, {12,12}, { 4, 6}, {12, 6}, { 4,14}, {12,14},

  115.     { 5, 1}, {13, 1}, { 5, 9}, {13, 9}, { 5, 3}, {13, 3}, { 5,11}, {13,11},

  116.     { 5, 5}, {13, 5}, { 5,13}, {13,13}, { 5, 7}, {13, 7}, { 5,15}, {13,15},

  117.     { 6, 0}, {14, 0}, { 6, 8}, {14, 8}, { 6, 2}, {14, 2}, { 6,10}, {14,10},

  118.     { 6, 4}, {14, 4}, { 6,12}, {14,12}, { 6, 6}, {14, 6}, { 6,14}, {14,14},

  119.     { 7, 1}, {15, 1}, { 7, 9}, {15, 9}, { 7, 3}, {15, 3}, { 7,11}, {15,11},

  120.     { 7, 5}, {15, 5}, { 7,13}, {15,13}, { 7, 7}, {15, 7}, { 7,15}, {15,15},        // quality 7

  121. 

  122.     { 0, 0}, { 8, 0}, { 0, 8}, { 8, 8}, { 4, 4}, {12, 4}, { 4,12}, {12,12},

  123.     { 0, 4}, { 8, 4}, { 0,12}, { 8,12}, { 4, 0}, {12, 0}, { 4, 8}, {12, 8},

  124.     { 2, 2}, {10, 2}, { 2,10}, {10,10}, { 6, 6}, {14, 6}, { 6,14}, {14,14},

  125.     { 2, 6}, {10, 6}, { 2,14}, {10,14}, { 6, 2}, {14, 2}, { 6,10}, {14,10},

  126.     { 0, 2}, { 8, 2}, { 0,10}, { 8,10}, { 4, 6}, {12, 6}, { 4,14}, {12,14},

  127.     { 0, 6}, { 8, 6}, { 0,14}, { 8,14}, { 4, 2}, {12, 2}, { 4,10}, {12,10},

  128.     { 2, 0}, {10, 0}, { 2, 8}, {10, 8}, { 6, 4}, {14, 4}, { 6,12}, {14,12},

  129.     { 2, 4}, {10, 4}, { 2,12}, {10,12}, { 6, 0}, {14, 0}, { 6, 8}, {14, 8},

  130.     { 1, 1}, { 9, 1}, { 1, 9}, { 9, 9}, { 5, 5}, {13, 5}, { 5,13}, {13,13},

  131.     { 1, 5}, { 9, 5}, { 1,13}, { 9,13}, { 5, 1}, {13, 1}, { 5, 9}, {13, 9},

  132.     { 3, 3}, {11, 3}, { 3,11}, {11,11}, { 7, 7}, {15, 7}, { 7,15}, {15,15},

  133.     { 3, 7}, {11, 7}, { 3,15}, {11,15}, { 7, 3}, {15, 3}, { 7,11}, {15,11},

  134.     { 1, 3}, { 9, 3}, { 1,11}, { 9,11}, { 5, 7}, {13, 7}, { 5,15}, {13,15},

  135.     { 1, 7}, { 9, 7}, { 1,15}, { 9,15}, { 5, 3}, {13, 3}, { 5,11}, {13,11},        // quality 8

  136.     { 3, 1}, {11, 1}, { 3, 9}, {11, 9}, { 7, 5}, {15, 5}, { 7,13}, {15,13},

  137.     { 3, 5}, {11, 5}, { 3,13}, {11,13}, { 7, 1}, {15, 1}, { 7, 9}, {15, 9},

  138.     { 0, 1}, { 8, 1}, { 0, 9}, { 8, 9}, { 4, 5}, {12, 5}, { 4,13}, {12,13},

  139.     { 0, 5}, { 8, 5}, { 0,13}, { 8,13}, { 4, 1}, {12, 1}, { 4, 9}, {12, 9},

  140.     { 2, 3}, {10, 3}, { 2,11}, {10,11}, { 6, 7}, {14, 7}, { 6,15}, {14,15},

  141.     { 2, 7}, {10, 7}, { 2,15}, {10,15}, { 6, 3}, {14, 3}, { 6,11}, {14,11},

  142.     { 0, 3}, { 8, 3}, { 0,11}, { 8,11}, { 4, 7}, {12, 7}, { 4,15}, {12,15},

  143.     { 0, 7}, { 8, 7}, { 0,15}, { 8,15}, { 4, 3}, {12, 3}, { 4,11}, {12,11},

  144.     { 2, 1}, {10, 1}, { 2, 9}, {10, 9}, { 6, 5}, {14, 5}, { 6,13}, {14,13},

  145.     { 2, 5}, {10, 5}, { 2,13}, {10,13}, { 6, 1}, {14, 1}, { 6, 9}, {14, 9},

  146.     { 1, 0}, { 9, 0}, { 1, 8}, { 9, 8}, { 5, 4}, {13, 4}, { 5,12}, {13,12},

  147.     { 1, 4}, { 9, 4}, { 1,12}, { 9,12}, { 5, 0}, {13, 0}, { 5, 8}, {13, 8},

  148.     { 3, 2}, {11, 2}, { 3,10}, {11,10}, { 7, 6}, {15, 6}, { 7,14}, {15,14},

  149.     { 3, 6}, {11, 6}, { 3,14}, {11,14}, { 7, 2}, {15, 2}, { 7,10}, {15,10},

  150.     { 1, 2}, { 9, 2}, { 1,10}, { 9,10}, { 5, 6}, {13, 6}, { 5,14}, {13,14},

  151.     { 1, 6}, { 9, 6}, { 1,14}, { 9,14}, { 5, 2}, {13, 2}, { 5,10}, {13,10},

  152.     { 3, 0}, {11, 0}, { 3, 8}, {11, 8}, { 7, 4}, {15, 4}, { 7,12}, {15,12},

  153.     { 3, 4}, {11, 4}, { 3,12}, {11,12}, { 7, 0}, {15, 0}, { 7, 8}, {15, 8},

  154. };

  155. 

  156. static void store_slice_c(uint8_t *dst, const uint16_t *src,

  157.                           int dst_stride, int src_stride,

  158.                           int width, int height, int log2_scale)

  159. {

  160.     int y, x;

  161. 

  162. #define STORE(pos) do {                                                     \

  163.     temp = ((src[x + y * src_stride + pos] << log2_scale) + d[pos]) >> 8;   \

  164.     if (temp & 0x100) temp = ~(temp >> 31);                                 \

  165.     dst[x + y * dst_stride + pos] = temp;                                   \

  166. } while (0)

  167. 

  168.     for (y = 0; y < height; y++) {

  169.         const uint8_t *d = dither[y&7];

  170.         for (x = 0; x < width; x += 8) {

  171.             int temp;

  172.             STORE(0);

  173.             STORE(1);

  174.             STORE(2);

  175.             STORE(3);

  176.             STORE(4);

  177.             STORE(5);

  178.             STORE(6);

  179.             STORE(7);

  180.         }

  181.     }

  182. }

  183. 

  184. static inline int norm_qscale(int qscale, int type)

  185. {

  186.     switch (type) {

  187.     case FF_QSCALE_TYPE_MPEG1: return qscale;

  188.     case FF_QSCALE_TYPE_MPEG2: return qscale >> 1;

  189.     case FF_QSCALE_TYPE_H264:  return qscale >> 2;

  190.     case FF_QSCALE_TYPE_VP56:  return (63 - qscale + 2) >> 2;

  191.     default: av_assert0(0);

  192.     }

  193.     return qscale;

  194. }

  195. 

  196. static void filter(USPPContext *p, uint8_t *dst[3], uint8_t *src[3],

  197.                    int dst_stride[3], int src_stride[3], int width,

  198.                    int height, uint8_t *qp_store, int qp_stride)

  199. {

  200.     int x, y, i, j;

  201.     const int count = 1<<p->log2_count;

  202. 

  203.     for (i = 0; i < 3; i++) {

  204.         int is_chroma = !!i;

  205.         int w = width  >> (is_chroma ? p->hsub : 0);

  206.         int h = height >> (is_chroma ? p->vsub : 0);

  207.         int stride = p->temp_stride[i];

  208.         int block = BLOCK >> (is_chroma ? p->hsub : 0);

  209. 

  210.         if (!src[i] || !dst[i])

  211.             continue;

  212.         for (y = 0; y < h; y++) {

  213.             int index = block + block * stride + y * stride;

  214. 

  215.             memcpy(p->src[i] + index, src[i] + y * src_stride[i], w );

  216.             for (x = 0; x < block; x++) {

  217.                 p->src[i][index     - x - 1] = p->src[i][index +     x    ];

  218.                 p->src[i][index + w + x    ] = p->src[i][index + w - x - 1];

  219.             }

  220.         }

  221.         for (y = 0; y < block; y++) {

  222.             memcpy(p->src[i] + (  block-1-y) * stride, p->src[i] + (  y+block  ) * stride, stride);

  223.             memcpy(p->src[i] + (h+block  +y) * stride, p->src[i] + (h-y+block-1) * stride, stride);

  224.         }

  225. 

  226.         p->frame->linesize[i] = stride;

  227.         memset(p->temp[i], 0, (h + 2 * block) * stride * sizeof(int16_t));

  228.     }

  229. 

  230.     if (p->qp)

  231.         p->frame->quality = p->qp * FF_QP2LAMBDA;

  232.     else {

  233.         int qpsum=0;

  234.         int qpcount = (height>>4) * (height>>4);

  235. 

  236.         for (y = 0; y < (height>>4); y++) {

  237.             for (x = 0; x < (width>>4); x++)

  238.                 qpsum += qp_store[x + y * qp_stride];

  239.         }

  240.         p->frame->quality = norm_qscale((qpsum + qpcount/2) / qpcount, p->qscale_type) * FF_QP2LAMBDA;

  241.     }

  242. //    init per MB qscale stuff FIXME

  243.     p->frame->height = height;

  244.     p->frame->width  = width;

  245. 

  246.     for (i = 0; i < count; i++) {

  247.         const int x1 = offset[i+count-1][0];

  248.         const int y1 = offset[i+count-1][1];

  249.         const int x1c = x1 >> p->hsub;

  250.         const int y1c = y1 >> p->vsub;

  251.         const int BLOCKc = BLOCK >> p->hsub;

  252.         int offset;

  253.         AVPacket pkt;

  254.         int got_pkt_ptr;

  255. 

  256.         av_init_packet(&pkt);

  257.         pkt.data = p->outbuf;

  258.         pkt.size = p->outbuf_size;

  259. 

  260.         p->frame->data[0] = p->src[0] + x1   + y1   * p->frame->linesize[0];

  261.         p->frame->data[1] = p->src[1] + x1c  + y1c  * p->frame->linesize[1];

  262.         p->frame->data[2] = p->src[2] + x1c  + y1c  * p->frame->linesize[2];

  263.         p->frame->format  = p->avctx_enc[i]->pix_fmt;

  264. 

  265.         avcodec_encode_video2(p->avctx_enc[i], &pkt, p->frame, &got_pkt_ptr);

  266.         p->frame_dec = p->avctx_enc[i]->coded_frame;

  267. 

  268.         offset = (BLOCK-x1) + (BLOCK-y1) * p->frame_dec->linesize[0];

  269. 

  270.         for (y = 0; y < height; y++)

  271.             for (x = 0; x < width; x++)

  272.                 p->temp[0][x + y * p->temp_stride[0]] += p->frame_dec->data[0][x + y * p->frame_dec->linesize[0] + offset];

  273. 

  274.         if (!src[2] || !dst[2])

  275.             continue;

  276. 

  277.         offset = (BLOCKc-x1c) + (BLOCKc-y1c) * p->frame_dec->linesize[1];

  278. 

  279.         for (y = 0; y < height>>p->vsub; y++) {

  280.             for (x = 0; x < width>>p->hsub; x++) {

  281.                 p->temp[1][x + y * p->temp_stride[1]] += p->frame_dec->data[1][x + y * p->frame_dec->linesize[1] + offset];

  282.                 p->temp[2][x + y * p->temp_stride[2]] += p->frame_dec->data[2][x + y * p->frame_dec->linesize[2] + offset];

  283.             }

  284.         }

  285.     }

  286. 

  287.     for (j = 0; j < 3; j++) {

  288.         int is_chroma = !!j;

  289.         if (!dst[j])

  290.             continue;

  291.         store_slice_c(dst[j], p->temp[j], dst_stride[j], p->temp_stride[j],

  292.                       width  >> (is_chroma ? p->hsub : 0),

  293.                       height >> (is_chroma ? p->vsub : 0),

  294.                       8-p->log2_count);

  295.     }

  296. }

  297. 

  298. static int query_formats(AVFilterContext *ctx)

  299. {

  300.     static const enum PixelFormat pix_fmts[] = {

  301.         AV_PIX_FMT_YUV444P,

  302.         AV_PIX_FMT_YUV420P,

  303.         AV_PIX_FMT_YUV410P,

  304.         AV_PIX_FMT_YUVJ444P,

  305.         AV_PIX_FMT_YUVJ420P,

  306.         AV_PIX_FMT_GRAY8,

  307.         AV_PIX_FMT_NONE

  308.     };

  309.     ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));

  310.     return 0;

  311. }

  312. 

  313. static int config_input(AVFilterLink *inlink)

  314. {

  315. 

  316.     AVFilterContext *ctx = inlink->dst;

  317.     USPPContext *uspp = ctx->priv;

  318.     const int height = inlink->h;

  319.     const int width  = inlink->w;

  320.     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);

  321.     int i;

  322. 

  323.     AVCodec *enc = avcodec_find_encoder(AV_CODEC_ID_SNOW);

  324.     if (!enc) {

  325.         av_log(ctx, AV_LOG_ERROR, "SNOW encoder not found.\n");

  326.         return AVERROR(EINVAL);

  327.     }

  328. 

  329.     uspp->hsub = desc->log2_chroma_w;

  330.     uspp->vsub = desc->log2_chroma_h;

  331. 

  332.     for (i = 0; i < 3; i++) {

  333.         int is_chroma = !!i;

  334.         int w = ((width  + 4 * BLOCK-1) & (~(2 * BLOCK-1))) >> (is_chroma ? uspp->hsub : 0);

  335.         int h = ((height + 4 * BLOCK-1) & (~(2 * BLOCK-1))) >> (is_chroma ? uspp->vsub : 0);

  336. 

  337.         uspp->temp_stride[i] = w;

  338.         if (!(uspp->temp[i] = av_malloc(uspp->temp_stride[i] * h * sizeof(int16_t))))

  339.             return AVERROR(ENOMEM);

  340.         if (!(uspp->src [i] = av_malloc(uspp->temp_stride[i] * h * sizeof(uint8_t))))

  341.             return AVERROR(ENOMEM);

  342.     }

  343. 

  344.     for (i = 0; i < (1<<uspp->log2_count); i++) {

  345.         AVCodecContext *avctx_enc;

  346.         AVDictionary *opts = NULL;

  347.         int ret;

  348. 

  349.         if (!(uspp->avctx_enc[i] = avcodec_alloc_context3(NULL)))

  350.             return AVERROR(ENOMEM);

  351. 

  352.         avctx_enc = uspp->avctx_enc[i];

  353.         avctx_enc->width = width + BLOCK;

  354.         avctx_enc->height = height + BLOCK;

  355.         avctx_enc->time_base = (AVRational){1,25};  // meaningless

  356.         avctx_enc->gop_size = 300;

  357.         avctx_enc->max_b_frames = 0;

  358.         avctx_enc->pix_fmt = inlink->format;

  359.         avctx_enc->flags = CODEC_FLAG_QSCALE | CODEC_FLAG_LOW_DELAY;

  360.         avctx_enc->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;

  361.         avctx_enc->global_quality = 123;

  362.         av_dict_set(&opts, "no_bitstream", "1", 0);

  363.         ret = avcodec_open2(avctx_enc, enc, &opts);

  364.         if (ret < 0)

  365.             return ret;

  366.         av_dict_free(&opts);

  367.         av_assert0(avctx_enc->codec);

  368.     }

  369. 

  370.     uspp->outbuf_size = (width + BLOCK) * (height + BLOCK) * 10;

  371.     if (!(uspp->frame = av_frame_alloc()))

  372.         return AVERROR(ENOMEM);

  373.     if (!(uspp->outbuf = av_malloc(uspp->outbuf_size)))

  374.         return AVERROR(ENOMEM);

  375. 

  376.     return 0;

  377. }

  378. 

  379. static int filter_frame(AVFilterLink *inlink, AVFrame *in)

  380. {

  381.     AVFilterContext *ctx = inlink->dst;

  382.     USPPContext *uspp = ctx->priv;

  383.     AVFilterLink *outlink = ctx->outputs[0];

  384.     AVFrame *out = in;

  385. 

  386.     int qp_stride = 0;

  387.     uint8_t *qp_table = NULL;

  388. 

  389.     /* if we are not in a constant user quantizer mode and we don't want to use

  390.      * the quantizers from the B-frames (B-frames often have a higher QP), we

  391.      * need to save the qp table from the last non B-frame; this is what the

  392.      * following code block does */

  393.     if (!uspp->qp) {

  394.         qp_table = av_frame_get_qp_table(in, &qp_stride, &uspp->qscale_type);

  395. 

  396.         if (qp_table && !uspp->use_bframe_qp && in->pict_type != AV_PICTURE_TYPE_B) {

  397.             int w, h;

  398. 

  399.             /* if the qp stride is not set, it means the QP are only defined on

  400.              * a line basis */

  401.             if (!qp_stride) {

  402.                 w = FF_CEIL_RSHIFT(inlink->w, 4);

  403.                 h = 1;

  404.             } else {

  405.                 w = qp_stride;

  406.                 h = FF_CEIL_RSHIFT(inlink->h, 4);

  407.             }

  408. 

  409.             if (w * h > uspp->non_b_qp_alloc_size) {

  410.                 int ret = av_reallocp_array(&uspp->non_b_qp_table, w, h);

  411.                 if (ret < 0) {

  412.                     uspp->non_b_qp_alloc_size = 0;

  413.                     return ret;

  414.                 }

  415.                 uspp->non_b_qp_alloc_size = w * h;

  416.             }

  417. 

  418.             av_assert0(w * h <= uspp->non_b_qp_alloc_size);

  419.             memcpy(uspp->non_b_qp_table, qp_table, w * h);

  420.         }

  421.     }

  422. 

  423.     if (uspp->log2_count && !ctx->is_disabled) {

  424.         if (!uspp->use_bframe_qp && uspp->non_b_qp_table)

  425.             qp_table = uspp->non_b_qp_table;

  426. 

  427.         if (qp_table || uspp->qp) {

  428. 

  429.             /* get a new frame if in-place is not possible or if the dimensions

  430.              * are not multiple of 8 */

  431.             if (!av_frame_is_writable(in) || (inlink->w & 7) || (inlink->h & 7)) {

  432.                 const int aligned_w = FFALIGN(inlink->w, 8);

  433.                 const int aligned_h = FFALIGN(inlink->h, 8);

  434. 

  435.                 out = ff_get_video_buffer(outlink, aligned_w, aligned_h);

  436.                 if (!out) {

  437.                     av_frame_free(&in);

  438.                     return AVERROR(ENOMEM);

  439.                 }

  440.                 av_frame_copy_props(out, in);

  441.                 out->width  = in->width;

  442.                 out->height = in->height;

  443.             }

  444. 

  445.             filter(uspp, out->data, in->data, out->linesize, in->linesize,

  446.                    inlink->w, inlink->h, qp_table, qp_stride);

  447.         }

  448.     }

  449. 

  450.     if (in != out) {

  451.         if (in->data[3])

  452.             av_image_copy_plane(out->data[3], out->linesize[3],

  453.                                 in ->data[3], in ->linesize[3],

  454.                                 inlink->w, inlink->h);

  455.         av_frame_free(&in);

  456.     }

  457.     return ff_filter_frame(outlink, out);

  458. }

  459. 

  460. static av_cold void uninit(AVFilterContext *ctx)

  461. {

  462.     USPPContext *uspp = ctx->priv;

  463.     int i;

  464. 

  465.     for (i = 0; i < 3; i++) {

  466.         av_freep(&uspp->temp[i]);

  467.         av_freep(&uspp->src[i]);

  468.     }

  469. 

  470.     for (i = 0; i < (1 << uspp->log2_count); i++) {

  471.         avcodec_close(uspp->avctx_enc[i]);

  472.         av_freep(&uspp->avctx_enc[i]);

  473.     }

  474. 

  475.     av_freep(&uspp->non_b_qp_table);

  476.     av_freep(&uspp->outbuf);

  477.     av_frame_free(&uspp->frame);

  478. }

  479. 

  480. static const AVFilterPad uspp_inputs[] = {

  481.     {

  482.         .name         = "default",

  483.         .type         = AVMEDIA_TYPE_VIDEO,

  484.         .config_props = config_input,

  485.         .filter_frame = filter_frame,

  486.     },

  487.     { NULL }

  488. };

  489. 

  490. static const AVFilterPad uspp_outputs[] = {

  491.     {

  492.         .name = "default",

  493.         .type = AVMEDIA_TYPE_VIDEO,

  494.     },

  495.     { NULL }

  496. };

  497. 

  498. AVFilter ff_vf_uspp = {

  499.     .name            = "uspp",

  500.     .description     = NULL_IF_CONFIG_SMALL("Apply Ultra Simple / Slow Post-processing filter."),

  501.     .priv_size       = sizeof(USPPContext),

  502.     .uninit          = uninit,

  503.     .query_formats   = query_formats,

  504.     .inputs          = uspp_inputs,

  505.     .outputs         = uspp_outputs,

  506.     .priv_class      = &uspp_class,

  507.     .flags           = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,

  508. };