GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavfilter/vf_codecview.c Lines: 97 133 72.9 %
Date: 2021-01-26 11:44:58 Branches: 57 128 44.5 %

Line Branch Exec Source
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/*
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 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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 * Copyright (c) 2014 Clément Bœsch <u pkh me>
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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/**
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 * @file
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 * Codec debug viewer filter.
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 *
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 * All the MV drawing code from Michael Niedermayer is extracted from
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 * libavcodec/mpegvideo.c.
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 *
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 * TODO: segmentation
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 */
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#include "libavutil/imgutils.h"
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#include "libavutil/motion_vector.h"
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#include "libavutil/opt.h"
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#include "avfilter.h"
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#include "qp_table.h"
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#include "internal.h"
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#define MV_P_FOR  (1<<0)
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#define MV_B_FOR  (1<<1)
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#define MV_B_BACK (1<<2)
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#define MV_TYPE_FOR  (1<<0)
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#define MV_TYPE_BACK (1<<1)
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#define FRAME_TYPE_I (1<<0)
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#define FRAME_TYPE_P (1<<1)
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#define FRAME_TYPE_B (1<<2)
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typedef struct CodecViewContext {
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    const AVClass *class;
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    unsigned mv;
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    unsigned frame_type;
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    unsigned mv_type;
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    int hsub, vsub;
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    int qp;
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} CodecViewContext;
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#define OFFSET(x) offsetof(CodecViewContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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#define CONST(name, help, val, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, 0, 0, FLAGS, unit }
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static const AVOption codecview_options[] = {
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    { "mv", "set motion vectors to visualize", OFFSET(mv), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "mv" },
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        CONST("pf", "forward predicted MVs of P-frames",  MV_P_FOR,  "mv"),
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        CONST("bf", "forward predicted MVs of B-frames",  MV_B_FOR,  "mv"),
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        CONST("bb", "backward predicted MVs of B-frames", MV_B_BACK, "mv"),
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    { "qp", NULL, OFFSET(qp), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
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    { "mv_type", "set motion vectors type", OFFSET(mv_type), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "mv_type" },
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    { "mvt",     "set motion vectors type", OFFSET(mv_type), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "mv_type" },
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        CONST("fp", "forward predicted MVs",  MV_TYPE_FOR,  "mv_type"),
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        CONST("bp", "backward predicted MVs", MV_TYPE_BACK, "mv_type"),
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    { "frame_type", "set frame types to visualize motion vectors of", OFFSET(frame_type), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "frame_type" },
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    { "ft",         "set frame types to visualize motion vectors of", OFFSET(frame_type), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "frame_type" },
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        CONST("if", "I-frames", FRAME_TYPE_I, "frame_type"),
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        CONST("pf", "P-frames", FRAME_TYPE_P, "frame_type"),
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        CONST("bf", "B-frames", FRAME_TYPE_B, "frame_type"),
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    { NULL }
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};
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AVFILTER_DEFINE_CLASS(codecview);
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static int query_formats(AVFilterContext *ctx)
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{
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    // TODO: we can probably add way more pixel formats without any other
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    // changes; anything with 8-bit luma in first plane should be working
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    static const enum AVPixelFormat pix_fmts[] = {AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE};
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2
    AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
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2
    if (!fmts_list)
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        return AVERROR(ENOMEM);
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2
    return ff_set_common_formats(ctx, fmts_list);
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}
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17331
static int clip_line(int *sx, int *sy, int *ex, int *ey, int maxx)
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{
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17331
    if(*sx > *ex)
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5175
        return clip_line(ex, ey, sx, sy, maxx);
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12156
    if (*sx < 0) {
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        if (*ex < 0)
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            return 1;
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        *sy = *ey + (*sy - *ey) * (int64_t)*ex / (*ex - *sx);
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9
        *sx = 0;
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    }
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12156
    if (*ex > maxx) {
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        if (*sx > maxx)
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            return 1;
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        *ey = *sy + (*ey - *sy) * (int64_t)(maxx - *sx) / (*ex - *sx);
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        *ex = maxx;
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    }
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12156
    return 0;
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}
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/**
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 * Draw a line from (ex, ey) -> (sx, sy).
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 * @param w width of the image
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 * @param h height of the image
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 * @param stride stride/linesize of the image
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 * @param color color of the arrow
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 */
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6078
static void draw_line(uint8_t *buf, int sx, int sy, int ex, int ey,
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                      int w, int h, int stride, int color)
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{
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    int x, y, fr, f;
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6078
    if (clip_line(&sx, &sy, &ex, &ey, w - 1))
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        return;
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6078
    if (clip_line(&sy, &sx, &ey, &ex, h - 1))
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        return;
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6078
    sx = av_clip(sx, 0, w - 1);
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6078
    sy = av_clip(sy, 0, h - 1);
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    ex = av_clip(ex, 0, w - 1);
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    ey = av_clip(ey, 0, h - 1);
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6078
    buf[sy * stride + sx] += color;
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6078
    if (FFABS(ex - sx) > FFABS(ey - sy)) {
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        if (sx > ex) {
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887
            FFSWAP(int, sx, ex);
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            FFSWAP(int, sy, ey);
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        }
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        buf += sx + sy * stride;
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        ex  -= sx;
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        f    = ((ey - sy) << 16) / ex;
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16943
        for (x = 0; x <= ex; x++) {
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15761
            y  = (x * f) >> 16;
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            fr = (x * f) & 0xFFFF;
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15761
                   buf[ y      * stride + x] += (color * (0x10000 - fr)) >> 16;
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15761
            if(fr) buf[(y + 1) * stride + x] += (color *            fr ) >> 16;
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        }
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    } else {
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4896
        if (sy > ey) {
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2168
            FFSWAP(int, sx, ex);
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2168
            FFSWAP(int, sy, ey);
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        }
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4896
        buf += sx + sy * stride;
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4896
        ey  -= sy;
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4896
        if (ey)
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2647
            f = ((ex - sx) << 16) / ey;
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        else
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2249
            f = 0;
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19576
        for(y= 0; y <= ey; y++){
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14680
            x  = (y*f) >> 16;
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14680
            fr = (y*f) & 0xFFFF;
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14680
                   buf[y * stride + x    ] += (color * (0x10000 - fr)) >> 16;
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14680
            if(fr) buf[y * stride + x + 1] += (color *            fr ) >> 16;
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        }
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    }
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}
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/**
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 * Draw an arrow from (ex, ey) -> (sx, sy).
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 * @param w width of the image
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 * @param h height of the image
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 * @param stride stride/linesize of the image
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 * @param color color of the arrow
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 */
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3560
static void draw_arrow(uint8_t *buf, int sx, int sy, int ex,
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                       int ey, int w, int h, int stride, int color, int tail, int direction)
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{
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    int dx,dy;
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3560
    if (direction) {
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1164
        FFSWAP(int, sx, ex);
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        FFSWAP(int, sy, ey);
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    }
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3560
    sx = av_clip(sx, -100, w + 100);
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3560
    sy = av_clip(sy, -100, h + 100);
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3560
    ex = av_clip(ex, -100, w + 100);
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3560
    ey = av_clip(ey, -100, h + 100);
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    dx = ex - sx;
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    dy = ey - sy;
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3560
    if (dx * dx + dy * dy > 3 * 3) {
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        int rx =  dx + dy;
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        int ry = -dx + dy;
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        int length = sqrt((rx * rx + ry * ry) << 8);
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        // FIXME subpixel accuracy
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1259
        rx = ROUNDED_DIV(rx * 3 << 4, length);
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1259
        ry = ROUNDED_DIV(ry * 3 << 4, length);
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1259
        if (tail) {
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            rx = -rx;
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            ry = -ry;
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        }
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1259
        draw_line(buf, sx, sy, sx + rx, sy + ry, w, h, stride, color);
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        draw_line(buf, sx, sy, sx - ry, sy + rx, w, h, stride, color);
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    }
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3560
    draw_line(buf, sx, sy, ex, ey, w, h, stride, color);
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3560
}
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static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
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{
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    AVFilterContext *ctx = inlink->dst;
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    CodecViewContext *s = ctx->priv;
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    AVFilterLink *outlink = ctx->outputs[0];
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222
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    if (s->qp) {
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        int qstride, qp_type, ret;
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        int8_t *qp_table;
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        ret = ff_qp_table_extract(frame, &qp_table, &qstride, NULL, &qp_type);
227
        if (ret < 0) {
228
            av_frame_free(&frame);
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            return ret;
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        }
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        if (qp_table) {
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            int x, y;
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            const int w = AV_CEIL_RSHIFT(frame->width,  s->hsub);
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            const int h = AV_CEIL_RSHIFT(frame->height, s->vsub);
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            uint8_t *pu = frame->data[1];
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            uint8_t *pv = frame->data[2];
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            const int lzu = frame->linesize[1];
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            const int lzv = frame->linesize[2];
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            for (y = 0; y < h; y++) {
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                for (x = 0; x < w; x++) {
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                    const int qp = ff_norm_qscale(qp_table[(y >> 3) * qstride + (x >> 3)], qp_type) * 128/31;
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                    pu[x] = pv[x] = qp;
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                }
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                pu += lzu;
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                pv += lzv;
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            }
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        }
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        av_freep(&qp_table);
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    }
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253

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    if (s->mv || s->mv_type) {
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        AVFrameSideData *sd = av_frame_get_side_data(frame, AV_FRAME_DATA_MOTION_VECTORS);
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67
        if (sd) {
256
            int i;
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31
            const AVMotionVector *mvs = (const AVMotionVector *)sd->data;
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31
            const int is_iframe = (s->frame_type & FRAME_TYPE_I) && frame->pict_type == AV_PICTURE_TYPE_I;
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            const int is_pframe = (s->frame_type & FRAME_TYPE_P) && frame->pict_type == AV_PICTURE_TYPE_P;
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            const int is_bframe = (s->frame_type & FRAME_TYPE_B) && frame->pict_type == AV_PICTURE_TYPE_B;
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3591
            for (i = 0; i < sd->size / sizeof(*mvs); i++) {
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3560
                const AVMotionVector *mv = &mvs[i];
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3560
                const int direction = mv->source > 0;
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3560
                if (s->mv_type) {
267
                    const int is_fp = direction == 0 && (s->mv_type & MV_TYPE_FOR);
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                    const int is_bp = direction == 1 && (s->mv_type & MV_TYPE_BACK);
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                    if ((!s->frame_type && (is_fp || is_bp)) ||
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                        is_iframe && is_fp || is_iframe && is_bp ||
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                        is_pframe && is_fp ||
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                        is_bframe && is_fp || is_bframe && is_bp)
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                        draw_arrow(frame->data[0], mv->dst_x, mv->dst_y, mv->src_x, mv->src_y,
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                                   frame->width, frame->height, frame->linesize[0],
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                                   100, 0, direction);
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3560
                } else if (s->mv)
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3560
                    if ((direction == 0 && (s->mv & MV_P_FOR)  && frame->pict_type == AV_PICTURE_TYPE_P) ||
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1936
                        (direction == 0 && (s->mv & MV_B_FOR)  && frame->pict_type == AV_PICTURE_TYPE_B) ||
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1164
                        (direction == 1 && (s->mv & MV_B_BACK) && frame->pict_type == AV_PICTURE_TYPE_B))
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3560
                        draw_arrow(frame->data[0], mv->dst_x, mv->dst_y, mv->src_x, mv->src_y,
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3560
                                   frame->width, frame->height, frame->linesize[0],
283
                                   100, 0, direction);
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            }
285
        }
286
    }
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67
    return ff_filter_frame(outlink, frame);
289
}
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2
static int config_input(AVFilterLink *inlink)
292
{
293
2
    AVFilterContext *ctx = inlink->dst;
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2
    CodecViewContext *s = ctx->priv;
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2
    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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2
    s->hsub = desc->log2_chroma_w;
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2
    s->vsub = desc->log2_chroma_h;
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2
    return 0;
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}
301
302
static const AVFilterPad codecview_inputs[] = {
303
    {
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        .name           = "default",
305
        .type           = AVMEDIA_TYPE_VIDEO,
306
        .filter_frame   = filter_frame,
307
        .config_props   = config_input,
308
        .needs_writable = 1,
309
    },
310
    { NULL }
311
};
312
313
static const AVFilterPad codecview_outputs[] = {
314
    {
315
        .name = "default",
316
        .type = AVMEDIA_TYPE_VIDEO,
317
    },
318
    { NULL }
319
};
320
321
AVFilter ff_vf_codecview = {
322
    .name          = "codecview",
323
    .description   = NULL_IF_CONFIG_SMALL("Visualize information about some codecs."),
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    .priv_size     = sizeof(CodecViewContext),
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    .query_formats = query_formats,
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    .inputs        = codecview_inputs,
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    .outputs       = codecview_outputs,
328
    .priv_class    = &codecview_class,
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    .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
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};