mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-07 11:13:41 +02:00
b4f5201967
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>
316 lines
12 KiB
C
316 lines
12 KiB
C
/*
|
|
* Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
|
|
* Copyright (c) 2011 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 General Public License as published by
|
|
* the Free Software Foundation; either version 2 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU 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
|
|
* Apply a boxblur filter to the input video.
|
|
* Ported from MPlayer libmpcodecs/vf_boxblur.c.
|
|
*/
|
|
|
|
#include "libavutil/avstring.h"
|
|
#include "libavutil/common.h"
|
|
#include "libavutil/opt.h"
|
|
#include "avfilter.h"
|
|
#include "formats.h"
|
|
#include "internal.h"
|
|
#include "video.h"
|
|
#include "boxblur.h"
|
|
|
|
|
|
typedef struct BoxBlurContext {
|
|
const AVClass *class;
|
|
FilterParam luma_param;
|
|
FilterParam chroma_param;
|
|
FilterParam alpha_param;
|
|
|
|
int hsub, vsub;
|
|
int radius[4];
|
|
int power[4];
|
|
uint8_t *temp[2]; ///< temporary buffer used in blur_power()
|
|
} BoxBlurContext;
|
|
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
|
{
|
|
BoxBlurContext *s = ctx->priv;
|
|
|
|
av_freep(&s->temp[0]);
|
|
av_freep(&s->temp[1]);
|
|
}
|
|
|
|
static int query_formats(AVFilterContext *ctx)
|
|
{
|
|
AVFilterFormats *formats = NULL;
|
|
int fmt, ret;
|
|
|
|
for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
|
|
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
|
|
if (!(desc->flags & (AV_PIX_FMT_FLAG_HWACCEL | AV_PIX_FMT_FLAG_BITSTREAM | AV_PIX_FMT_FLAG_PAL)) &&
|
|
(desc->flags & AV_PIX_FMT_FLAG_PLANAR || desc->nb_components == 1) &&
|
|
(!(desc->flags & AV_PIX_FMT_FLAG_BE) == !HAVE_BIGENDIAN || desc->comp[0].depth == 8) &&
|
|
(ret = ff_add_format(&formats, fmt)) < 0)
|
|
return ret;
|
|
}
|
|
|
|
return ff_set_common_formats(ctx, formats);
|
|
}
|
|
|
|
static int config_input(AVFilterLink *inlink)
|
|
{
|
|
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
|
|
AVFilterContext *ctx = inlink->dst;
|
|
BoxBlurContext *s = ctx->priv;
|
|
int w = inlink->w, h = inlink->h;
|
|
int ret;
|
|
|
|
if (!(s->temp[0] = av_malloc(2*FFMAX(w, h))) ||
|
|
!(s->temp[1] = av_malloc(2*FFMAX(w, h))))
|
|
return AVERROR(ENOMEM);
|
|
|
|
s->hsub = desc->log2_chroma_w;
|
|
s->vsub = desc->log2_chroma_h;
|
|
|
|
ret = ff_boxblur_eval_filter_params(inlink,
|
|
&s->luma_param,
|
|
&s->chroma_param,
|
|
&s->alpha_param);
|
|
|
|
if (ret != 0) {
|
|
av_log(ctx, AV_LOG_ERROR, "Failed to evaluate "
|
|
"filter params: %d.\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
s->radius[Y] = s->luma_param.radius;
|
|
s->radius[U] = s->radius[V] = s->chroma_param.radius;
|
|
s->radius[A] = s->alpha_param.radius;
|
|
|
|
s->power[Y] = s->luma_param.power;
|
|
s->power[U] = s->power[V] = s->chroma_param.power;
|
|
s->power[A] = s->alpha_param.power;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Naive boxblur would sum source pixels from x-radius .. x+radius
|
|
* for destination pixel x. That would be O(radius*width).
|
|
* If you now look at what source pixels represent 2 consecutive
|
|
* output pixels, then you see they are almost identical and only
|
|
* differ by 2 pixels, like:
|
|
* src0 111111111
|
|
* dst0 1
|
|
* src1 111111111
|
|
* dst1 1
|
|
* src0-src1 1 -1
|
|
* so when you know one output pixel you can find the next by just adding
|
|
* and subtracting 1 input pixel.
|
|
* The following code adopts this faster variant.
|
|
*/
|
|
#define BLUR(type, depth) \
|
|
static inline void blur ## depth(type *dst, int dst_step, const type *src, \
|
|
int src_step, int len, int radius) \
|
|
{ \
|
|
const int length = radius*2 + 1; \
|
|
const int inv = ((1<<16) + length/2)/length; \
|
|
int x, sum = src[radius*src_step]; \
|
|
\
|
|
for (x = 0; x < radius; x++) \
|
|
sum += src[x*src_step]<<1; \
|
|
\
|
|
sum = sum*inv + (1<<15); \
|
|
\
|
|
for (x = 0; x <= radius; x++) { \
|
|
sum += (src[(radius+x)*src_step] - src[(radius-x)*src_step])*inv; \
|
|
dst[x*dst_step] = sum>>16; \
|
|
} \
|
|
\
|
|
for (; x < len-radius; x++) { \
|
|
sum += (src[(radius+x)*src_step] - src[(x-radius-1)*src_step])*inv; \
|
|
dst[x*dst_step] = sum >>16; \
|
|
} \
|
|
\
|
|
for (; x < len; x++) { \
|
|
sum += (src[(2*len-radius-x-1)*src_step] - src[(x-radius-1)*src_step])*inv; \
|
|
dst[x*dst_step] = sum>>16; \
|
|
} \
|
|
}
|
|
|
|
BLUR(uint8_t, 8)
|
|
BLUR(uint16_t, 16)
|
|
|
|
#undef BLUR
|
|
|
|
static inline void blur(uint8_t *dst, int dst_step, const uint8_t *src, int src_step,
|
|
int len, int radius, int pixsize)
|
|
{
|
|
if (pixsize == 1) blur8 (dst, dst_step , src, src_step , len, radius);
|
|
else blur16((uint16_t*)dst, dst_step>>1, (const uint16_t*)src, src_step>>1, len, radius);
|
|
}
|
|
|
|
static inline void blur_power(uint8_t *dst, int dst_step, const uint8_t *src, int src_step,
|
|
int len, int radius, int power, uint8_t *temp[2], int pixsize)
|
|
{
|
|
uint8_t *a = temp[0], *b = temp[1];
|
|
|
|
if (radius && power) {
|
|
blur(a, pixsize, src, src_step, len, radius, pixsize);
|
|
for (; power > 2; power--) {
|
|
uint8_t *c;
|
|
blur(b, pixsize, a, pixsize, len, radius, pixsize);
|
|
c = a; a = b; b = c;
|
|
}
|
|
if (power > 1) {
|
|
blur(dst, dst_step, a, pixsize, len, radius, pixsize);
|
|
} else {
|
|
int i;
|
|
if (pixsize == 1) {
|
|
for (i = 0; i < len; i++)
|
|
dst[i*dst_step] = a[i];
|
|
} else
|
|
for (i = 0; i < len; i++)
|
|
*(uint16_t*)(dst + i*dst_step) = ((uint16_t*)a)[i];
|
|
}
|
|
} else {
|
|
int i;
|
|
if (pixsize == 1) {
|
|
for (i = 0; i < len; i++)
|
|
dst[i*dst_step] = src[i*src_step];
|
|
} else
|
|
for (i = 0; i < len; i++)
|
|
*(uint16_t*)(dst + i*dst_step) = *(uint16_t*)(src + i*src_step);
|
|
}
|
|
}
|
|
|
|
static void hblur(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize,
|
|
int w, int h, int radius, int power, uint8_t *temp[2], int pixsize)
|
|
{
|
|
int y;
|
|
|
|
if (radius == 0 && dst == src)
|
|
return;
|
|
|
|
for (y = 0; y < h; y++)
|
|
blur_power(dst + y*dst_linesize, pixsize, src + y*src_linesize, pixsize,
|
|
w, radius, power, temp, pixsize);
|
|
}
|
|
|
|
static void vblur(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize,
|
|
int w, int h, int radius, int power, uint8_t *temp[2], int pixsize)
|
|
{
|
|
int x;
|
|
|
|
if (radius == 0 && dst == src)
|
|
return;
|
|
|
|
for (x = 0; x < w; x++)
|
|
blur_power(dst + x*pixsize, dst_linesize, src + x*pixsize, src_linesize,
|
|
h, radius, power, temp, pixsize);
|
|
}
|
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
BoxBlurContext *s = ctx->priv;
|
|
AVFilterLink *outlink = inlink->dst->outputs[0];
|
|
AVFrame *out;
|
|
int plane;
|
|
int cw = AV_CEIL_RSHIFT(inlink->w, s->hsub), ch = AV_CEIL_RSHIFT(in->height, s->vsub);
|
|
int w[4] = { inlink->w, cw, cw, inlink->w };
|
|
int h[4] = { in->height, ch, ch, in->height };
|
|
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
|
|
const int depth = desc->comp[0].depth;
|
|
const int pixsize = (depth+7)/8;
|
|
|
|
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
|
|
if (!out) {
|
|
av_frame_free(&in);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
av_frame_copy_props(out, in);
|
|
|
|
for (plane = 0; plane < 4 && in->data[plane] && in->linesize[plane]; plane++)
|
|
hblur(out->data[plane], out->linesize[plane],
|
|
in ->data[plane], in ->linesize[plane],
|
|
w[plane], h[plane], s->radius[plane], s->power[plane],
|
|
s->temp, pixsize);
|
|
|
|
for (plane = 0; plane < 4 && in->data[plane] && in->linesize[plane]; plane++)
|
|
vblur(out->data[plane], out->linesize[plane],
|
|
out->data[plane], out->linesize[plane],
|
|
w[plane], h[plane], s->radius[plane], s->power[plane],
|
|
s->temp, pixsize);
|
|
|
|
av_frame_free(&in);
|
|
|
|
return ff_filter_frame(outlink, out);
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(BoxBlurContext, x)
|
|
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
|
|
|
|
static const AVOption boxblur_options[] = {
|
|
{ "luma_radius", "Radius of the luma blurring box", OFFSET(luma_param.radius_expr), AV_OPT_TYPE_STRING, {.str="2"}, .flags = FLAGS },
|
|
{ "lr", "Radius of the luma blurring box", OFFSET(luma_param.radius_expr), AV_OPT_TYPE_STRING, {.str="2"}, .flags = FLAGS },
|
|
{ "luma_power", "How many times should the boxblur be applied to luma", OFFSET(luma_param.power), AV_OPT_TYPE_INT, {.i64=2}, 0, INT_MAX, .flags = FLAGS },
|
|
{ "lp", "How many times should the boxblur be applied to luma", OFFSET(luma_param.power), AV_OPT_TYPE_INT, {.i64=2}, 0, INT_MAX, .flags = FLAGS },
|
|
|
|
{ "chroma_radius", "Radius of the chroma blurring box", OFFSET(chroma_param.radius_expr), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
|
|
{ "cr", "Radius of the chroma blurring box", OFFSET(chroma_param.radius_expr), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
|
|
{ "chroma_power", "How many times should the boxblur be applied to chroma", OFFSET(chroma_param.power), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS },
|
|
{ "cp", "How many times should the boxblur be applied to chroma", OFFSET(chroma_param.power), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS },
|
|
|
|
{ "alpha_radius", "Radius of the alpha blurring box", OFFSET(alpha_param.radius_expr), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
|
|
{ "ar", "Radius of the alpha blurring box", OFFSET(alpha_param.radius_expr), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
|
|
{ "alpha_power", "How many times should the boxblur be applied to alpha", OFFSET(alpha_param.power), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS },
|
|
{ "ap", "How many times should the boxblur be applied to alpha", OFFSET(alpha_param.power), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS },
|
|
|
|
{ NULL }
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS(boxblur);
|
|
|
|
static const AVFilterPad avfilter_vf_boxblur_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_input,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
};
|
|
|
|
static const AVFilterPad avfilter_vf_boxblur_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
},
|
|
};
|
|
|
|
const AVFilter ff_vf_boxblur = {
|
|
.name = "boxblur",
|
|
.description = NULL_IF_CONFIG_SMALL("Blur the input."),
|
|
.priv_size = sizeof(BoxBlurContext),
|
|
.priv_class = &boxblur_class,
|
|
.uninit = uninit,
|
|
FILTER_INPUTS(avfilter_vf_boxblur_inputs),
|
|
FILTER_OUTPUTS(avfilter_vf_boxblur_outputs),
|
|
FILTER_QUERY_FUNC(query_formats),
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
|
|
};
|