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

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

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

  170.             int temp;

  171.             STORE(0);

  172.             STORE(1);

  173.             STORE(2);

  174.             STORE(3);

  175.             STORE(4);

  176.             STORE(5);

  177.             STORE(6);

  178.             STORE(7);

  179.         }

  180.     }

  181. }

  182. 

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

  189.     int ret;

  190. 

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

  192.         int is_chroma = !!i;

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

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

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

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

  197. 

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

  199.             continue;

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

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

  202. 

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

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

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

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

  207.             }

  208.         }

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

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

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

  212.         }

  213. 

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

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

  216.     }

  217. 

  218.     if (p->qp)

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

  220.     else {

  221.         int qpsum=0;

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

  223. 

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

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

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

  227.         }

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

  229.     }

  230. //    init per MB qscale stuff FIXME

  231.     p->frame->height = height + BLOCK;

  232.     p->frame->width  = width + BLOCK;

  233. 

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

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

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

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

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

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

  240.         int offset;

  241.         AVPacket pkt = {0};

  242.         int got_pkt_ptr;

  243. 

  244.         av_init_packet(&pkt);

  245.         pkt.data = p->outbuf;

  246.         pkt.size = p->outbuf_size;

  247. 

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

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

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

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

  252. 

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

  254.         if (ret < 0) {

  255.             av_log(p->avctx_enc[i], AV_LOG_ERROR, "Encoding failed\n");

  256.             continue;

  257.         }

  258. 

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

  260. 

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

  262. 

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

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

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

  266. 

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

  268.             continue;

  269. 

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

  271. 

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

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

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

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

  281.         int is_chroma = !!j;

  282.         if (!dst[j])

  283.             continue;

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

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

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

  287.                       8-p->log2_count);

  288.     }

  289. }

  290. 

  291. 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.     AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);

  304.     if (!fmts_list)

  305.         return AVERROR(ENOMEM);

  306.     return ff_set_common_formats(ctx, fmts_list);

  307. }

  308. 

  309. static int config_input(AVFilterLink *inlink)

  310. {

  311. 

  312.     AVFilterContext *ctx = inlink->dst;

  313.     USPPContext *uspp = ctx->priv;

  314.     const int height = inlink->h;

  315.     const int width  = inlink->w;

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

  317.     int i;

  318. 

  319.     AVCodec *enc = avcodec_find_encoder(AV_CODEC_ID_SNOW);

  320.     if (!enc) {

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

  322.         return AVERROR(EINVAL);

  323.     }

  324. 

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

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

  327. 

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

  329.         int is_chroma = !!i;

  330.         int w = (width  + 4 * BLOCK-1) & (~(2 * BLOCK-1));

  331.         int h = (height + 4 * BLOCK-1) & (~(2 * BLOCK-1));

  332. 

  333.         if (is_chroma) {

  334.             w = AV_CEIL_RSHIFT(w, uspp->hsub);

  335.             h = AV_CEIL_RSHIFT(h, uspp->vsub);

  336.         }

  337. 

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

  339.         if (!(uspp->temp[i] = av_malloc_array(uspp->temp_stride[i], h * sizeof(int16_t))))

  340.             return AVERROR(ENOMEM);

  341.         if (!(uspp->src [i] = av_malloc_array(uspp->temp_stride[i], h * sizeof(uint8_t))))

  342.             return AVERROR(ENOMEM);

  343.     }

  344. 

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

  346.         AVCodecContext *avctx_enc;

  347.         AVDictionary *opts = NULL;

  348.         int ret;

  349. 

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

  351.             return AVERROR(ENOMEM);

  352. 

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

  354.         avctx_enc->width = width + BLOCK;

  355.         avctx_enc->height = height + BLOCK;

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

  357.         avctx_enc->gop_size = INT_MAX;

  358.         avctx_enc->max_b_frames = 0;

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

  360.         avctx_enc->flags = AV_CODEC_FLAG_QSCALE | AV_CODEC_FLAG_LOW_DELAY;

  361.         avctx_enc->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;

  362.         avctx_enc->global_quality = 123;

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

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

  365.         if (ret < 0)

  366.             return ret;

  367.         av_dict_free(&opts);

  368.         av_assert0(avctx_enc->codec);

  369.     }

  370. 

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

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

  373.         return AVERROR(ENOMEM);

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

  375.         return AVERROR(ENOMEM);

  376. 

  377.     return 0;

  378. }

  379. 

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

  381. {

  382.     AVFilterContext *ctx = inlink->dst;

  383.     USPPContext *uspp = ctx->priv;

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

  385.     AVFrame *out = in;

  386. 

  387.     int qp_stride = 0;

  388.     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.     if (!uspp->qp) {

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

  396. 

  397.         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.             if (!qp_stride) {

  403.                 w = AV_CEIL_RSHIFT(inlink->w, 4);

  404.                 h = 1;

  405.             } else {

  406.                 w = qp_stride;

  407.                 h = AV_CEIL_RSHIFT(inlink->h, 4);

  408.             }

  409. 

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

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

  412.                 if (ret < 0) {

  413.                     uspp->non_b_qp_alloc_size = 0;

  414.                     return ret;

  415.                 }

  416.                 uspp->non_b_qp_alloc_size = w * h;

  417.             }

  418. 

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

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

  421.         }

  422.     }

  423. 

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

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

  426.             qp_table = uspp->non_b_qp_table;

  427. 

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

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

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

  435. 

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

  437.                 if (!out) {

  438.                     av_frame_free(&in);

  439.                     return AVERROR(ENOMEM);

  440.                 }

  441.                 av_frame_copy_props(out, in);

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

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

  444.             }

  445. 

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

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

  448.         }

  449.     }

  450. 

  451.     if (in != out) {

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

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

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

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

  456.         av_frame_free(&in);

  457.     }

  458.     return ff_filter_frame(outlink, out);

  459. }

  460. 

  461. static av_cold void uninit(AVFilterContext *ctx)

  462. {

  463.     USPPContext *uspp = ctx->priv;

  464.     int i;

  465. 

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

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

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

  469.     }

  470. 

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

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

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

  474.     }

  475. 

  476.     av_freep(&uspp->non_b_qp_table);

  477.     av_freep(&uspp->outbuf);

  478.     av_frame_free(&uspp->frame);

  479. }

  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. };