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FFmpeg/libavfilter/vf_codecview.c
Andreas Rheinhardt b4f5201967 avfilter: Replace query_formats callback with union of list and callback
If one looks at the many query_formats callbacks in existence,
one will immediately recognize that there is one type of default
callback for video and a slightly different default callback for
audio: It is "return ff_set_common_formats_from_list(ctx, pix_fmts);"
for video with a filter-specific pix_fmts list. For audio, it is
the same with a filter-specific sample_fmts list together with
ff_set_common_all_samplerates() and ff_set_common_all_channel_counts().

This commit allows to remove the boilerplate query_formats callbacks
by replacing said callback with a union consisting the old callback
and pointers for pixel and sample format arrays. For the not uncommon
case in which these lists only contain a single entry (besides the
sentinel) enum AVPixelFormat and enum AVSampleFormat fields are also
added to the union to store them directly in the AVFilter,
thereby avoiding a relocation.

The state of said union will be contained in a new, dedicated AVFilter
field (the nb_inputs and nb_outputs fields have been shrunk to uint8_t
in order to create a hole for this new field; this is no problem, as
the maximum of all the nb_inputs is four; for nb_outputs it is only
two).

The state's default value coincides with the earlier default of
query_formats being unset, namely that the filter accepts all formats
(and also sample rates and channel counts/layouts for audio)
provided that these properties agree coincide for all inputs and
outputs.

By using different union members for audio and video filters
the type-unsafety of using the same functions for audio and video
lists will furthermore be more confined to formats.c than before.

When the new fields are used, they will also avoid allocations:
Currently something nearly equivalent to ff_default_query_formats()
is called after every successful call to a query_formats callback;
yet in the common case that the newly allocated AVFilterFormats
are not used at all (namely if there are no free links) these newly
allocated AVFilterFormats are freed again without ever being used.
Filters no longer using the callback will not exhibit this any more.

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2021-10-05 17:48:25 +02:00

361 lines
12 KiB
C

/*
* 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/imgutils.h"
#include "libavutil/motion_vector.h"
#include "libavutil/opt.h"
#include "libavutil/video_enc_params.h"
#include "avfilter.h"
#include "qp_table.h"
#include "internal.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, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, 0, 0, FLAGS, unit }
static const AVOption codecview_options[] = {
{ "mv", "set motion vectors to visualize", OFFSET(mv), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "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, "mv_type" },
{ "mvt", "set motion vectors type", OFFSET(mv_type), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "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, "frame_type" },
{ "ft", "set frame types to visualize motion vectors of", OFFSET(frame_type), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "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 query_formats(AVFilterContext *ctx)
{
// TODO: we can probably add way more pixel formats without any other
// changes; anything with 8-bit luma in first plane should be working
static const enum AVPixelFormat pix_fmts[] = {AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE};
return ff_set_common_formats_from_list(ctx, pix_fmts);
}
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, int 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, int 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, int 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;
}
for (int x = sx; x < sx + w; x++)
buf[x] = color;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
AVFilterContext *ctx = inlink->dst;
CodecViewContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
if (s->qp) {
int qstride, qp_type, 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 int lzu = frame->linesize[1];
const int 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 int 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,
},
};
static const AVFilterPad codecview_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
};
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(codecview_outputs),
FILTER_QUERY_FUNC(query_formats),
.priv_class = &codecview_class,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
};