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FFmpeg/libavfilter/vf_codecview.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h 
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

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/*
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
* Copyright (c) 2014 Clément Bœsch <u pkh me>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Codec debug viewer filter.
*
* All the MV drawing code from Michael Niedermayer is extracted from
* libavcodec/mpegvideo.c.
*
* TODO: segmentation
*/
#include "libavutil/mem.h"
#include "libavutil/motion_vector.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/video_enc_params.h"
#include "avfilter.h"
#include "qp_table.h"
#include "internal.h"
#include "video.h"
#define MV_P_FOR (1<<0)
#define MV_B_FOR (1<<1)
#define MV_B_BACK (1<<2)
#define MV_TYPE_FOR (1<<0)
#define MV_TYPE_BACK (1<<1)
#define FRAME_TYPE_I (1<<0)
#define FRAME_TYPE_P (1<<1)
#define FRAME_TYPE_B (1<<2)
typedef struct CodecViewContext {
const AVClass *class;
unsigned mv;
unsigned frame_type;
unsigned mv_type;
int hsub, vsub;
int qp;
int block;
} CodecViewContext;
#define OFFSET(x) offsetof(CodecViewContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define CONST(name, help, val, u) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, 0, 0, FLAGS, .unit = u }
static const AVOption codecview_options[] = {
{ "mv", "set motion vectors to visualize", OFFSET(mv), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, .unit = "mv" },
CONST("pf", "forward predicted MVs of P-frames", MV_P_FOR, "mv"),
CONST("bf", "forward predicted MVs of B-frames", MV_B_FOR, "mv"),
CONST("bb", "backward predicted MVs of B-frames", MV_B_BACK, "mv"),
{ "qp", NULL, OFFSET(qp), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
{ "mv_type", "set motion vectors type", OFFSET(mv_type), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, .unit = "mv_type" },
{ "mvt", "set motion vectors type", OFFSET(mv_type), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, .unit = "mv_type" },
CONST("fp", "forward predicted MVs", MV_TYPE_FOR, "mv_type"),
CONST("bp", "backward predicted MVs", MV_TYPE_BACK, "mv_type"),
{ "frame_type", "set frame types to visualize motion vectors of", OFFSET(frame_type), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, .unit = "frame_type" },
{ "ft", "set frame types to visualize motion vectors of", OFFSET(frame_type), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, .unit = "frame_type" },
CONST("if", "I-frames", FRAME_TYPE_I, "frame_type"),
CONST("pf", "P-frames", FRAME_TYPE_P, "frame_type"),
CONST("bf", "B-frames", FRAME_TYPE_B, "frame_type"),
{ "block", "set block partitioning structure to visualize", OFFSET(block), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(codecview);
static int clip_line(int *sx, int *sy, int *ex, int *ey, int maxx)
{
if(*sx > *ex)
return clip_line(ex, ey, sx, sy, maxx);
if (*sx < 0) {
if (*ex < 0)
return 1;
*sy = *ey + (*sy - *ey) * (int64_t)*ex / (*ex - *sx);
*sx = 0;
}
if (*ex > maxx) {
if (*sx > maxx)
return 1;
*ey = *sy + (*ey - *sy) * (int64_t)(maxx - *sx) / (*ex - *sx);
*ex = maxx;
}
return 0;
}
/**
* Draw a line from (ex, ey) -> (sx, sy).
* @param w width of the image
* @param h height of the image
* @param stride stride/linesize of the image
* @param color color of the arrow
*/
static void draw_line(uint8_t *buf, int sx, int sy, int ex, int ey,
int w, int h, ptrdiff_t stride, int color)
{
int x, y, fr, f;
if (clip_line(&sx, &sy, &ex, &ey, w - 1))
return;
if (clip_line(&sy, &sx, &ey, &ex, h - 1))
return;
sx = av_clip(sx, 0, w - 1);
sy = av_clip(sy, 0, h - 1);
ex = av_clip(ex, 0, w - 1);
ey = av_clip(ey, 0, h - 1);
buf[sy * stride + sx] += color;
if (FFABS(ex - sx) > FFABS(ey - sy)) {
if (sx > ex) {
FFSWAP(int, sx, ex);
FFSWAP(int, sy, ey);
}
buf += sx + sy * stride;
ex -= sx;
f = ((ey - sy) * (1 << 16)) / ex;
for (x = 0; x <= ex; x++) {
y = (x * f) >> 16;
fr = (x * f) & 0xFFFF;
buf[ y * stride + x] += (color * (0x10000 - fr)) >> 16;
if(fr) buf[(y + 1) * stride + x] += (color * fr ) >> 16;
}
} else {
if (sy > ey) {
FFSWAP(int, sx, ex);
FFSWAP(int, sy, ey);
}
buf += sx + sy * stride;
ey -= sy;
if (ey)
f = ((ex - sx) * (1 << 16)) / ey;
else
f = 0;
for(y= 0; y <= ey; y++){
x = (y*f) >> 16;
fr = (y*f) & 0xFFFF;
buf[y * stride + x ] += (color * (0x10000 - fr)) >> 16;
if(fr) buf[y * stride + x + 1] += (color * fr ) >> 16;
}
}
}
/**
* Draw an arrow from (ex, ey) -> (sx, sy).
* @param w width of the image
* @param h height of the image
* @param stride stride/linesize of the image
* @param color color of the arrow
*/
static void draw_arrow(uint8_t *buf, int sx, int sy, int ex,
int ey, int w, int h, ptrdiff_t stride, int color, int tail, int direction)
{
int dx,dy;
if (direction) {
FFSWAP(int, sx, ex);
FFSWAP(int, sy, ey);
}
sx = av_clip(sx, -100, w + 100);
sy = av_clip(sy, -100, h + 100);
ex = av_clip(ex, -100, w + 100);
ey = av_clip(ey, -100, h + 100);
dx = ex - sx;
dy = ey - sy;
if (dx * dx + dy * dy > 3 * 3) {
int rx = dx + dy;
int ry = -dx + dy;
int length = sqrt((rx * rx + ry * ry) << 8);
// FIXME subpixel accuracy
rx = ROUNDED_DIV(rx * (3 << 4), length);
ry = ROUNDED_DIV(ry * (3 << 4), length);
if (tail) {
rx = -rx;
ry = -ry;
}
draw_line(buf, sx, sy, sx + rx, sy + ry, w, h, stride, color);
draw_line(buf, sx, sy, sx - ry, sy + rx, w, h, stride, color);
}
draw_line(buf, sx, sy, ex, ey, w, h, stride, color);
}
static void draw_block_rectangle(uint8_t *buf, int sx, int sy, int w, int h, ptrdiff_t stride, int color)
{
for (int x = sx; x < sx + w; x++)
buf[x] = color;
for (int y = sy; y < sy + h; y++) {
buf[sx] = color;
buf[sx + w - 1] = color;
buf += stride;
}
}
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
AVFilterContext *ctx = inlink->dst;
CodecViewContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
if (s->qp) {
enum AVVideoEncParamsType qp_type;
int qstride, ret;
int8_t *qp_table;
ret = ff_qp_table_extract(frame, &qp_table, &qstride, NULL, &qp_type);
if (ret < 0) {
av_frame_free(&frame);
return ret;
}
if (qp_table) {
int x, y;
const int w = AV_CEIL_RSHIFT(frame->width, s->hsub);
const int h = AV_CEIL_RSHIFT(frame->height, s->vsub);
uint8_t *pu = frame->data[1];
uint8_t *pv = frame->data[2];
const ptrdiff_t lzu = frame->linesize[1];
const ptrdiff_t lzv = frame->linesize[2];
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
const int qp = ff_norm_qscale(qp_table[(y >> 3) * qstride + (x >> 3)], qp_type) * 128/31;
pu[x] = pv[x] = qp;
}
pu += lzu;
pv += lzv;
}
}
av_freep(&qp_table);
}
if (s->block) {
AVFrameSideData *sd = av_frame_get_side_data(frame, AV_FRAME_DATA_VIDEO_ENC_PARAMS);
if (sd) {
AVVideoEncParams *par = (AVVideoEncParams*)sd->data;
const ptrdiff_t stride = frame->linesize[0];
if (par->nb_blocks) {
for (int block_idx = 0; block_idx < par->nb_blocks; block_idx++) {
AVVideoBlockParams *b = av_video_enc_params_block(par, block_idx);
uint8_t *buf = frame->data[0] + b->src_y * stride;
draw_block_rectangle(buf, b->src_x, b->src_y, b->w, b->h, stride, 100);
}
}
}
}
if (s->mv || s->mv_type) {
AVFrameSideData *sd = av_frame_get_side_data(frame, AV_FRAME_DATA_MOTION_VECTORS);
if (sd) {
int i;
const AVMotionVector *mvs = (const AVMotionVector *)sd->data;
const int is_iframe = (s->frame_type & FRAME_TYPE_I) && frame->pict_type == AV_PICTURE_TYPE_I;
const int is_pframe = (s->frame_type & FRAME_TYPE_P) && frame->pict_type == AV_PICTURE_TYPE_P;
const int is_bframe = (s->frame_type & FRAME_TYPE_B) && frame->pict_type == AV_PICTURE_TYPE_B;
for (i = 0; i < sd->size / sizeof(*mvs); i++) {
const AVMotionVector *mv = &mvs[i];
const int direction = mv->source > 0;
if (s->mv_type) {
const int is_fp = direction == 0 && (s->mv_type & MV_TYPE_FOR);
const int is_bp = direction == 1 && (s->mv_type & MV_TYPE_BACK);
if ((!s->frame_type && (is_fp || is_bp)) ||
is_iframe && is_fp || is_iframe && is_bp ||
is_pframe && is_fp ||
is_bframe && is_fp || is_bframe && is_bp)
draw_arrow(frame->data[0], mv->dst_x, mv->dst_y, mv->src_x, mv->src_y,
frame->width, frame->height, frame->linesize[0],
100, 0, direction);
} else if (s->mv)
if ((direction == 0 && (s->mv & MV_P_FOR) && frame->pict_type == AV_PICTURE_TYPE_P) ||
(direction == 0 && (s->mv & MV_B_FOR) && frame->pict_type == AV_PICTURE_TYPE_B) ||
(direction == 1 && (s->mv & MV_B_BACK) && frame->pict_type == AV_PICTURE_TYPE_B))
draw_arrow(frame->data[0], mv->dst_x, mv->dst_y, mv->src_x, mv->src_y,
frame->width, frame->height, frame->linesize[0],
100, 0, direction);
}
}
}
return ff_filter_frame(outlink, frame);
}
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
CodecViewContext *s = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
s->hsub = desc->log2_chroma_w;
s->vsub = desc->log2_chroma_h;
return 0;
}
static const AVFilterPad codecview_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.flags = AVFILTERPAD_FLAG_NEEDS_WRITABLE,
.filter_frame = filter_frame,
.config_props = config_input,
},
};
const AVFilter ff_vf_codecview = {
.name = "codecview",
.description = NULL_IF_CONFIG_SMALL("Visualize information about some codecs."),
.priv_size = sizeof(CodecViewContext),
FILTER_INPUTS(codecview_inputs),
FILTER_OUTPUTS(ff_video_default_filterpad),
// TODO: we can probably add way more pixel formats without any other
// changes; anything with 8-bit luma in first plane should be working
FILTER_SINGLE_PIXFMT(AV_PIX_FMT_YUV420P),
.priv_class = &codecview_class,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
};
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