323 lines
11 KiB
C
323 lines
11 KiB
C
/*
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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 "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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AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
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if (!fmts_list)
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return AVERROR(ENOMEM);
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return ff_set_common_formats(ctx, fmts_list);
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}
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static int clip_line(int *sx, int *sy, int *ex, int *ey, int maxx)
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{
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if(*sx > *ex)
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return clip_line(ex, ey, sx, sy, maxx);
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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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*sx = 0;
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}
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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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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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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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if (clip_line(&sx, &sy, &ex, &ey, w - 1))
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return;
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if (clip_line(&sy, &sx, &ey, &ex, h - 1))
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return;
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sx = av_clip(sx, 0, w - 1);
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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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buf[sy * stride + sx] += color;
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if (FFABS(ex - sx) > FFABS(ey - sy)) {
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if (sx > ex) {
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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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for (x = 0; x <= ex; x++) {
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y = (x * f) >> 16;
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fr = (x * f) & 0xFFFF;
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buf[ y * stride + x] += (color * (0x10000 - fr)) >> 16;
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if(fr) buf[(y + 1) * stride + x] += (color * fr ) >> 16;
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}
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} else {
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if (sy > ey) {
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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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ey -= sy;
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if (ey)
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f = ((ex - sx) << 16) / ey;
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else
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f = 0;
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for(y= 0; y <= ey; y++){
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x = (y*f) >> 16;
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fr = (y*f) & 0xFFFF;
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buf[y * stride + x ] += (color * (0x10000 - fr)) >> 16;
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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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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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if (direction) {
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FFSWAP(int, sx, ex);
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FFSWAP(int, sy, ey);
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}
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sx = av_clip(sx, -100, w + 100);
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sy = av_clip(sy, -100, h + 100);
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ex = av_clip(ex, -100, w + 100);
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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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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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rx = ROUNDED_DIV(rx * 3 << 4, length);
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ry = ROUNDED_DIV(ry * 3 << 4, length);
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if (tail) {
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rx = -rx;
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ry = -ry;
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}
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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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draw_line(buf, sx, sy, ex, ey, w, h, stride, color);
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}
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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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if (s->qp) {
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int qstride, qp_type;
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int8_t *qp_table = av_frame_get_qp_table(frame, &qstride, &qp_type);
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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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}
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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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if (sd) {
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int i;
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const AVMotionVector *mvs = (const AVMotionVector *)sd->data;
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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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for (i = 0; i < sd->size / sizeof(*mvs); i++) {
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const AVMotionVector *mv = &mvs[i];
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const int direction = mv->source > 0;
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if (s->mv_type) {
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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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} else if (s->mv)
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if ((direction == 0 && (s->mv & MV_P_FOR) && frame->pict_type == AV_PICTURE_TYPE_P) ||
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(direction == 0 && (s->mv & MV_B_FOR) && frame->pict_type == AV_PICTURE_TYPE_B) ||
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(direction == 1 && (s->mv & MV_B_BACK) && frame->pict_type == AV_PICTURE_TYPE_B))
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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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}
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}
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}
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return ff_filter_frame(outlink, frame);
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}
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static int config_input(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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CodecViewContext *s = ctx->priv;
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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s->hsub = desc->log2_chroma_w;
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s->vsub = desc->log2_chroma_h;
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return 0;
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}
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static const AVFilterPad codecview_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.filter_frame = filter_frame,
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.config_props = config_input,
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.needs_writable = 1,
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},
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{ NULL }
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};
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static const AVFilterPad codecview_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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},
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{ NULL }
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};
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AVFilter ff_vf_codecview = {
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.name = "codecview",
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.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,
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.priv_class = &codecview_class,
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
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};
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