mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-07 11:13:41 +02:00
1e7d2007c3
Makes it robust against adding fields before it, which will be useful in following commits. Majority of the patch generated by the following Coccinelle script: @@ typedef AVOption; identifier arr_name; initializer list il; initializer list[8] il1; expression tail; @@ AVOption arr_name[] = { il, { il1, - tail + .unit = tail }, ... }; with some manual changes, as the script: * has trouble with options defined inside macros * sometimes does not handle options under an #else branch * sometimes swallows whitespace
463 lines
16 KiB
C
463 lines
16 KiB
C
/*
|
|
* Copyright (c) 2008 vmrsss
|
|
* Copyright (c) 2009 Stefano Sabatini
|
|
*
|
|
* 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
|
|
* video padding filter
|
|
*/
|
|
|
|
#include <float.h> /* DBL_MAX */
|
|
|
|
#include "avfilter.h"
|
|
#include "formats.h"
|
|
#include "internal.h"
|
|
#include "video.h"
|
|
#include "libavutil/avstring.h"
|
|
#include "libavutil/common.h"
|
|
#include "libavutil/eval.h"
|
|
#include "libavutil/pixdesc.h"
|
|
#include "libavutil/colorspace.h"
|
|
#include "libavutil/imgutils.h"
|
|
#include "libavutil/parseutils.h"
|
|
#include "libavutil/mathematics.h"
|
|
#include "libavutil/opt.h"
|
|
|
|
#include "drawutils.h"
|
|
|
|
static const char *const var_names[] = {
|
|
"in_w", "iw",
|
|
"in_h", "ih",
|
|
"out_w", "ow",
|
|
"out_h", "oh",
|
|
"x",
|
|
"y",
|
|
"a",
|
|
"sar",
|
|
"dar",
|
|
"hsub",
|
|
"vsub",
|
|
NULL
|
|
};
|
|
|
|
enum var_name {
|
|
VAR_IN_W, VAR_IW,
|
|
VAR_IN_H, VAR_IH,
|
|
VAR_OUT_W, VAR_OW,
|
|
VAR_OUT_H, VAR_OH,
|
|
VAR_X,
|
|
VAR_Y,
|
|
VAR_A,
|
|
VAR_SAR,
|
|
VAR_DAR,
|
|
VAR_HSUB,
|
|
VAR_VSUB,
|
|
VARS_NB
|
|
};
|
|
|
|
static int query_formats(AVFilterContext *ctx)
|
|
{
|
|
return ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0));
|
|
}
|
|
|
|
enum EvalMode {
|
|
EVAL_MODE_INIT,
|
|
EVAL_MODE_FRAME,
|
|
EVAL_MODE_NB
|
|
};
|
|
|
|
typedef struct PadContext {
|
|
const AVClass *class;
|
|
int w, h; ///< output dimensions, a value of 0 will result in the input size
|
|
int x, y; ///< offsets of the input area with respect to the padded area
|
|
int in_w, in_h; ///< width and height for the padded input video, which has to be aligned to the chroma values in order to avoid chroma issues
|
|
int inlink_w, inlink_h;
|
|
AVRational aspect;
|
|
|
|
char *w_expr; ///< width expression string
|
|
char *h_expr; ///< height expression string
|
|
char *x_expr; ///< width expression string
|
|
char *y_expr; ///< height expression string
|
|
uint8_t rgba_color[4]; ///< color for the padding area
|
|
FFDrawContext draw;
|
|
FFDrawColor color;
|
|
|
|
int eval_mode; ///< expression evaluation mode
|
|
} PadContext;
|
|
|
|
static int config_input(AVFilterLink *inlink)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
PadContext *s = ctx->priv;
|
|
AVRational adjusted_aspect = s->aspect;
|
|
int ret;
|
|
double var_values[VARS_NB], res;
|
|
char *expr;
|
|
|
|
ff_draw_init2(&s->draw, inlink->format, inlink->colorspace, inlink->color_range, 0);
|
|
ff_draw_color(&s->draw, &s->color, s->rgba_color);
|
|
|
|
var_values[VAR_IN_W] = var_values[VAR_IW] = inlink->w;
|
|
var_values[VAR_IN_H] = var_values[VAR_IH] = inlink->h;
|
|
var_values[VAR_OUT_W] = var_values[VAR_OW] = NAN;
|
|
var_values[VAR_OUT_H] = var_values[VAR_OH] = NAN;
|
|
var_values[VAR_A] = (double) inlink->w / inlink->h;
|
|
var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ?
|
|
(double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
|
|
var_values[VAR_DAR] = var_values[VAR_A] * var_values[VAR_SAR];
|
|
var_values[VAR_HSUB] = 1 << s->draw.hsub_max;
|
|
var_values[VAR_VSUB] = 1 << s->draw.vsub_max;
|
|
|
|
/* evaluate width and height */
|
|
av_expr_parse_and_eval(&res, (expr = s->w_expr),
|
|
var_names, var_values,
|
|
NULL, NULL, NULL, NULL, NULL, 0, ctx);
|
|
s->w = var_values[VAR_OUT_W] = var_values[VAR_OW] = res;
|
|
if ((ret = av_expr_parse_and_eval(&res, (expr = s->h_expr),
|
|
var_names, var_values,
|
|
NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
|
|
goto eval_fail;
|
|
s->h = var_values[VAR_OUT_H] = var_values[VAR_OH] = res;
|
|
if (!s->h)
|
|
var_values[VAR_OUT_H] = var_values[VAR_OH] = s->h = inlink->h;
|
|
|
|
/* evaluate the width again, as it may depend on the evaluated output height */
|
|
if ((ret = av_expr_parse_and_eval(&res, (expr = s->w_expr),
|
|
var_names, var_values,
|
|
NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
|
|
goto eval_fail;
|
|
s->w = var_values[VAR_OUT_W] = var_values[VAR_OW] = res;
|
|
if (!s->w)
|
|
var_values[VAR_OUT_W] = var_values[VAR_OW] = s->w = inlink->w;
|
|
|
|
if (adjusted_aspect.num && adjusted_aspect.den) {
|
|
adjusted_aspect = av_div_q(adjusted_aspect, inlink->sample_aspect_ratio);
|
|
if (s->h < av_rescale(s->w, adjusted_aspect.den, adjusted_aspect.num)) {
|
|
s->h = var_values[VAR_OUT_H] = var_values[VAR_OH] = av_rescale(s->w, adjusted_aspect.den, adjusted_aspect.num);
|
|
} else {
|
|
s->w = var_values[VAR_OUT_W] = var_values[VAR_OW] = av_rescale(s->h, adjusted_aspect.num, adjusted_aspect.den);
|
|
}
|
|
}
|
|
|
|
/* evaluate x and y */
|
|
av_expr_parse_and_eval(&res, (expr = s->x_expr),
|
|
var_names, var_values,
|
|
NULL, NULL, NULL, NULL, NULL, 0, ctx);
|
|
s->x = var_values[VAR_X] = res;
|
|
if ((ret = av_expr_parse_and_eval(&res, (expr = s->y_expr),
|
|
var_names, var_values,
|
|
NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
|
|
goto eval_fail;
|
|
s->y = var_values[VAR_Y] = res;
|
|
/* evaluate x again, as it may depend on the evaluated y value */
|
|
if ((ret = av_expr_parse_and_eval(&res, (expr = s->x_expr),
|
|
var_names, var_values,
|
|
NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
|
|
goto eval_fail;
|
|
s->x = var_values[VAR_X] = res;
|
|
|
|
if (s->x < 0 || s->x + inlink->w > s->w)
|
|
s->x = var_values[VAR_X] = (s->w - inlink->w) / 2;
|
|
if (s->y < 0 || s->y + inlink->h > s->h)
|
|
s->y = var_values[VAR_Y] = (s->h - inlink->h) / 2;
|
|
|
|
s->w = ff_draw_round_to_sub(&s->draw, 0, -1, s->w);
|
|
s->h = ff_draw_round_to_sub(&s->draw, 1, -1, s->h);
|
|
/* sanity check params */
|
|
if (s->w < inlink->w || s->h < inlink->h) {
|
|
av_log(ctx, AV_LOG_ERROR, "Padded dimensions cannot be smaller than input dimensions.\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
s->x = ff_draw_round_to_sub(&s->draw, 0, -1, s->x);
|
|
s->y = ff_draw_round_to_sub(&s->draw, 1, -1, s->y);
|
|
s->in_w = ff_draw_round_to_sub(&s->draw, 0, -1, inlink->w);
|
|
s->in_h = ff_draw_round_to_sub(&s->draw, 1, -1, inlink->h);
|
|
s->inlink_w = inlink->w;
|
|
s->inlink_h = inlink->h;
|
|
|
|
av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d -> w:%d h:%d x:%d y:%d color:0x%02X%02X%02X%02X\n",
|
|
inlink->w, inlink->h, s->w, s->h, s->x, s->y,
|
|
s->rgba_color[0], s->rgba_color[1], s->rgba_color[2], s->rgba_color[3]);
|
|
|
|
if (s->x < 0 || s->y < 0 ||
|
|
s->w <= 0 || s->h <= 0 ||
|
|
(unsigned)s->x + (unsigned)inlink->w > s->w ||
|
|
(unsigned)s->y + (unsigned)inlink->h > s->h) {
|
|
av_log(ctx, AV_LOG_ERROR,
|
|
"Input area %d:%d:%d:%d not within the padded area 0:0:%d:%d or zero-sized\n",
|
|
s->x, s->y, s->x + inlink->w, s->y + inlink->h, s->w, s->h);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
return 0;
|
|
|
|
eval_fail:
|
|
av_log(ctx, AV_LOG_ERROR,
|
|
"Error when evaluating the expression '%s'\n", expr);
|
|
return ret;
|
|
|
|
}
|
|
|
|
static int config_output(AVFilterLink *outlink)
|
|
{
|
|
PadContext *s = outlink->src->priv;
|
|
|
|
outlink->w = s->w;
|
|
outlink->h = s->h;
|
|
return 0;
|
|
}
|
|
|
|
static AVFrame *get_video_buffer(AVFilterLink *inlink, int w, int h)
|
|
{
|
|
PadContext *s = inlink->dst->priv;
|
|
AVFrame *frame;
|
|
int plane;
|
|
|
|
if (s->inlink_w <= 0)
|
|
return NULL;
|
|
|
|
frame = ff_get_video_buffer(inlink->dst->outputs[0],
|
|
w + (s->w - s->in_w),
|
|
h + (s->h - s->in_h) + (s->x > 0));
|
|
|
|
if (!frame)
|
|
return NULL;
|
|
|
|
frame->width = w;
|
|
frame->height = h;
|
|
|
|
for (plane = 0; plane < 4 && frame->data[plane] && frame->linesize[plane]; plane++) {
|
|
int hsub = s->draw.hsub[plane];
|
|
int vsub = s->draw.vsub[plane];
|
|
frame->data[plane] += (s->x >> hsub) * s->draw.pixelstep[plane] +
|
|
(s->y >> vsub) * frame->linesize[plane];
|
|
}
|
|
|
|
return frame;
|
|
}
|
|
|
|
/* check whether each plane in this buffer can be padded without copying */
|
|
static int buffer_needs_copy(PadContext *s, AVFrame *frame, AVBufferRef *buf)
|
|
{
|
|
int planes[4] = { -1, -1, -1, -1}, *p = planes;
|
|
int i, j;
|
|
|
|
/* get all planes in this buffer */
|
|
for (i = 0; i < FF_ARRAY_ELEMS(planes) && frame->data[i]; i++) {
|
|
if (av_frame_get_plane_buffer(frame, i) == buf)
|
|
*p++ = i;
|
|
}
|
|
|
|
/* for each plane in this buffer, check that it can be padded without
|
|
* going over buffer bounds or other planes */
|
|
for (i = 0; i < FF_ARRAY_ELEMS(planes) && planes[i] >= 0; i++) {
|
|
int hsub = s->draw.hsub[planes[i]];
|
|
int vsub = s->draw.vsub[planes[i]];
|
|
|
|
uint8_t *start = frame->data[planes[i]];
|
|
uint8_t *end = start + (frame->height >> vsub) *
|
|
frame->linesize[planes[i]];
|
|
|
|
/* amount of free space needed before the start and after the end
|
|
* of the plane */
|
|
ptrdiff_t req_start = (s->x >> hsub) * s->draw.pixelstep[planes[i]] +
|
|
(s->y >> vsub) * frame->linesize[planes[i]];
|
|
ptrdiff_t req_end = ((s->w - s->x - frame->width) >> hsub) *
|
|
s->draw.pixelstep[planes[i]] +
|
|
((s->h - s->y - frame->height) >> vsub) * frame->linesize[planes[i]];
|
|
|
|
if (frame->linesize[planes[i]] < (s->w >> hsub) * s->draw.pixelstep[planes[i]])
|
|
return 1;
|
|
if (start - buf->data < req_start ||
|
|
(buf->data + buf->size) - end < req_end)
|
|
return 1;
|
|
|
|
for (j = 0; j < FF_ARRAY_ELEMS(planes) && planes[j] >= 0; j++) {
|
|
int vsub1 = s->draw.vsub[planes[j]];
|
|
uint8_t *start1 = frame->data[planes[j]];
|
|
uint8_t *end1 = start1 + (frame->height >> vsub1) *
|
|
frame->linesize[planes[j]];
|
|
if (i == j)
|
|
continue;
|
|
|
|
if (FFSIGN(start - end1) != FFSIGN(start - end1 - req_start) ||
|
|
FFSIGN(end - start1) != FFSIGN(end - start1 + req_end))
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int frame_needs_copy(PadContext *s, AVFrame *frame)
|
|
{
|
|
int i;
|
|
|
|
if (!av_frame_is_writable(frame))
|
|
return 1;
|
|
|
|
for (i = 0; i < 4 && frame->buf[i]; i++)
|
|
if (buffer_needs_copy(s, frame, frame->buf[i]))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
|
|
{
|
|
PadContext *s = inlink->dst->priv;
|
|
AVFilterLink *outlink = inlink->dst->outputs[0];
|
|
AVFrame *out;
|
|
int needs_copy;
|
|
if(s->eval_mode == EVAL_MODE_FRAME && (
|
|
in->width != s->inlink_w
|
|
|| in->height != s->inlink_h
|
|
|| in->format != outlink->format
|
|
|| in->sample_aspect_ratio.den != outlink->sample_aspect_ratio.den || in->sample_aspect_ratio.num != outlink->sample_aspect_ratio.num)) {
|
|
int ret;
|
|
|
|
inlink->dst->inputs[0]->format = in->format;
|
|
inlink->dst->inputs[0]->w = in->width;
|
|
inlink->dst->inputs[0]->h = in->height;
|
|
|
|
inlink->dst->inputs[0]->sample_aspect_ratio.den = in->sample_aspect_ratio.den;
|
|
inlink->dst->inputs[0]->sample_aspect_ratio.num = in->sample_aspect_ratio.num;
|
|
|
|
|
|
if ((ret = config_input(inlink)) < 0) {
|
|
s->inlink_w = -1;
|
|
return ret;
|
|
}
|
|
if ((ret = config_output(outlink)) < 0) {
|
|
s->inlink_w = -1;
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
needs_copy = frame_needs_copy(s, in);
|
|
|
|
if (needs_copy) {
|
|
av_log(inlink->dst, AV_LOG_DEBUG, "Direct padding impossible allocating new frame\n");
|
|
out = ff_get_video_buffer(outlink,
|
|
FFMAX(inlink->w, s->w),
|
|
FFMAX(inlink->h, s->h));
|
|
if (!out) {
|
|
av_frame_free(&in);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
av_frame_copy_props(out, in);
|
|
} else {
|
|
int i;
|
|
|
|
out = in;
|
|
for (i = 0; i < 4 && out->data[i] && out->linesize[i]; i++) {
|
|
int hsub = s->draw.hsub[i];
|
|
int vsub = s->draw.vsub[i];
|
|
out->data[i] -= (s->x >> hsub) * s->draw.pixelstep[i] +
|
|
(s->y >> vsub) * out->linesize[i];
|
|
}
|
|
}
|
|
|
|
/* top bar */
|
|
if (s->y) {
|
|
ff_fill_rectangle(&s->draw, &s->color,
|
|
out->data, out->linesize,
|
|
0, 0, s->w, s->y);
|
|
}
|
|
|
|
/* bottom bar */
|
|
if (s->h > s->y + s->in_h) {
|
|
ff_fill_rectangle(&s->draw, &s->color,
|
|
out->data, out->linesize,
|
|
0, s->y + s->in_h, s->w, s->h - s->y - s->in_h);
|
|
}
|
|
|
|
/* left border */
|
|
ff_fill_rectangle(&s->draw, &s->color, out->data, out->linesize,
|
|
0, s->y, s->x, in->height);
|
|
|
|
if (needs_copy) {
|
|
ff_copy_rectangle2(&s->draw,
|
|
out->data, out->linesize, in->data, in->linesize,
|
|
s->x, s->y, 0, 0, in->width, in->height);
|
|
}
|
|
|
|
/* right border */
|
|
ff_fill_rectangle(&s->draw, &s->color, out->data, out->linesize,
|
|
s->x + s->in_w, s->y, s->w - s->x - s->in_w,
|
|
in->height);
|
|
|
|
out->width = s->w;
|
|
out->height = s->h;
|
|
|
|
if (in != out)
|
|
av_frame_free(&in);
|
|
return ff_filter_frame(outlink, out);
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(PadContext, x)
|
|
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
|
|
|
|
static const AVOption pad_options[] = {
|
|
{ "width", "set the pad area width expression", OFFSET(w_expr), AV_OPT_TYPE_STRING, {.str = "iw"}, 0, 0, FLAGS },
|
|
{ "w", "set the pad area width expression", OFFSET(w_expr), AV_OPT_TYPE_STRING, {.str = "iw"}, 0, 0, FLAGS },
|
|
{ "height", "set the pad area height expression", OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, 0, 0, FLAGS },
|
|
{ "h", "set the pad area height expression", OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, 0, 0, FLAGS },
|
|
{ "x", "set the x offset expression for the input image position", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str = "0"}, 0, 0, FLAGS },
|
|
{ "y", "set the y offset expression for the input image position", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str = "0"}, 0, 0, FLAGS },
|
|
{ "color", "set the color of the padded area border", OFFSET(rgba_color), AV_OPT_TYPE_COLOR, {.str = "black"}, .flags = FLAGS },
|
|
{ "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_INIT}, 0, EVAL_MODE_NB-1, FLAGS, .unit = "eval" },
|
|
{ "init", "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT}, .flags = FLAGS, .unit = "eval" },
|
|
{ "frame", "eval expressions during initialization and per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },
|
|
{ "aspect", "pad to fit an aspect instead of a resolution", OFFSET(aspect), AV_OPT_TYPE_RATIONAL, {.dbl = 0}, 0, DBL_MAX, FLAGS },
|
|
{ NULL }
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS(pad);
|
|
|
|
static const AVFilterPad avfilter_vf_pad_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_input,
|
|
.get_buffer.video = get_video_buffer,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
};
|
|
|
|
static const AVFilterPad avfilter_vf_pad_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_output,
|
|
},
|
|
};
|
|
|
|
const AVFilter ff_vf_pad = {
|
|
.name = "pad",
|
|
.description = NULL_IF_CONFIG_SMALL("Pad the input video."),
|
|
.priv_size = sizeof(PadContext),
|
|
.priv_class = &pad_class,
|
|
FILTER_INPUTS(avfilter_vf_pad_inputs),
|
|
FILTER_OUTPUTS(avfilter_vf_pad_outputs),
|
|
FILTER_QUERY_FUNC(query_formats),
|
|
};
|