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FFmpeg/libavfilter/vf_pp7.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) 2005 Michael Niedermayer <michaelni@gmx.at>
* Copyright (c) 2014 Arwa Arif <arwaarif1994@gmail.com>
*
* 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
* Postprocessing filter - 7
*
* Originally written by Michael Niedermayer for the MPlayer
* project, and ported by Arwa Arif for FFmpeg.
*/
#include "libavutil/emms.h"
#include "libavutil/imgutils.h"
#include "libavutil/mem.h"
#include "libavutil/mem_internal.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "internal.h"
#include "qp_table.h"
#include "vf_pp7.h"
#include "video.h"
enum mode {
MODE_HARD,
MODE_SOFT,
MODE_MEDIUM
};
#define OFFSET(x) offsetof(PP7Context, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption pp7_options[] = {
{ "qp", "force a constant quantizer parameter", OFFSET(qp), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 64, FLAGS },
{ "mode", "set thresholding mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64 = MODE_MEDIUM}, 0, 2, FLAGS, .unit = "mode" },
{ "hard", "hard thresholding", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_HARD}, INT_MIN, INT_MAX, FLAGS, .unit = "mode" },
{ "soft", "soft thresholding", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_SOFT}, INT_MIN, INT_MAX, FLAGS, .unit = "mode" },
{ "medium", "medium thresholding", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_MEDIUM}, INT_MIN, INT_MAX, FLAGS, .unit = "mode" },
{ NULL }
};
AVFILTER_DEFINE_CLASS(pp7);
DECLARE_ALIGNED(8, static const uint8_t, dither)[8][8] = {
{ 0, 48, 12, 60, 3, 51, 15, 63, },
{ 32, 16, 44, 28, 35, 19, 47, 31, },
{ 8, 56, 4, 52, 11, 59, 7, 55, },
{ 40, 24, 36, 20, 43, 27, 39, 23, },
{ 2, 50, 14, 62, 1, 49, 13, 61, },
{ 34, 18, 46, 30, 33, 17, 45, 29, },
{ 10, 58, 6, 54, 9, 57, 5, 53, },
{ 42, 26, 38, 22, 41, 25, 37, 21, },
};
#define N0 4
#define N1 5
#define N2 10
#define SN0 2
#define SN1 2.2360679775
#define SN2 3.16227766017
#define N (1 << 16)
static const int factor[16] = {
N / (N0 * N0), N / (N0 * N1), N / (N0 * N0), N / (N0 * N2),
N / (N1 * N0), N / (N1 * N1), N / (N1 * N0), N / (N1 * N2),
N / (N0 * N0), N / (N0 * N1), N / (N0 * N0), N / (N0 * N2),
N / (N2 * N0), N / (N2 * N1), N / (N2 * N0), N / (N2 * N2),
};
static void init_thres2(PP7Context *p)
{
int qp, i;
int bias = 0; //FIXME
for (qp = 0; qp < 99; qp++) {
for (i = 0; i < 16; i++) {
p->thres2[qp][i] = ((i&1) ? SN2 : SN0) * ((i&4) ? SN2 : SN0) * FFMAX(1, qp) * (1<<2) - 1 - bias;
}
}
}
static inline void dctA_c(int16_t *dst, uint8_t *src, int stride)
{
int i;
for (i = 0; i < 4; i++) {
int s0 = src[0 * stride] + src[6 * stride];
int s1 = src[1 * stride] + src[5 * stride];
int s2 = src[2 * stride] + src[4 * stride];
int s3 = src[3 * stride];
int s = s3 + s3;
s3 = s - s0;
s0 = s + s0;
s = s2 + s1;
s2 = s2 - s1;
dst[0] = s0 + s;
dst[2] = s0 - s;
dst[1] = 2 * s3 + s2;
dst[3] = s3 - 2 * s2;
src++;
dst += 4;
}
}
static void dctB_c(int16_t *dst, int16_t *src)
{
int i;
for (i = 0; i < 4; i++) {
int s0 = src[0 * 4] + src[6 * 4];
int s1 = src[1 * 4] + src[5 * 4];
int s2 = src[2 * 4] + src[4 * 4];
int s3 = src[3 * 4];
int s = s3 + s3;
s3 = s - s0;
s0 = s + s0;
s = s2 + s1;
s2 = s2 - s1;
dst[0 * 4] = s0 + s;
dst[2 * 4] = s0 - s;
dst[1 * 4] = 2 * s3 + s2;
dst[3 * 4] = s3 - 2 * s2;
src++;
dst++;
}
}
static int hardthresh_c(PP7Context *p, int16_t *src, int qp)
{
int i;
int a;
a = src[0] * factor[0];
for (i = 1; i < 16; i++) {
unsigned int threshold1 = p->thres2[qp][i];
unsigned int threshold2 = threshold1 << 1;
int level = src[i];
if (((unsigned)(level + threshold1)) > threshold2)
a += level * factor[i];
}
return (a + (1 << 11)) >> 12;
}
static int mediumthresh_c(PP7Context *p, int16_t *src, int qp)
{
int i;
int a;
a = src[0] * factor[0];
for (i = 1; i < 16; i++) {
unsigned int threshold1 = p->thres2[qp][i];
unsigned int threshold2 = threshold1 << 1;
int level = src[i];
if (((unsigned)(level + threshold1)) > threshold2) {
if (((unsigned)(level + 2 * threshold1)) > 2 * threshold2)
a += level * factor[i];
else {
if (level > 0)
a += 2 * (level - (int)threshold1) * factor[i];
else
a += 2 * (level + (int)threshold1) * factor[i];
}
}
}
return (a + (1 << 11)) >> 12;
}
static int softthresh_c(PP7Context *p, int16_t *src, int qp)
{
int i;
int a;
a = src[0] * factor[0];
for (i = 1; i < 16; i++) {
unsigned int threshold1 = p->thres2[qp][i];
unsigned int threshold2 = threshold1 << 1;
int level = src[i];
if (((unsigned)(level + threshold1)) > threshold2) {
if (level > 0)
a += (level - (int)threshold1) * factor[i];
else
a += (level + (int)threshold1) * factor[i];
}
}
return (a + (1 << 11)) >> 12;
}
static void filter(PP7Context *p, uint8_t *dst, uint8_t *src,
int dst_stride, int src_stride,
int width, int height,
uint8_t *qp_store, int qp_stride, int is_luma)
{
int x, y;
const int stride = is_luma ? p->temp_stride : ((width + 16 + 15) & (~15));
uint8_t *p_src = p->src + 8 * stride;
int16_t *block = (int16_t *)p->src;
int16_t *temp = (int16_t *)(p->src + 32);
if (!src || !dst) return;
for (y = 0; y < height; y++) {
int index = 8 + 8 * stride + y * stride;
memcpy(p_src + index, src + y * src_stride, width);
for (x = 0; x < 8; x++) {
p_src[index - x - 1]= p_src[index + x ];
p_src[index + width + x ]= p_src[index + width - x - 1];
}
}
for (y = 0; y < 8; y++) {
memcpy(p_src + ( 7 - y ) * stride, p_src + ( y + 8 ) * stride, stride);
memcpy(p_src + (height + 8 + y) * stride, p_src + (height - y + 7) * stride, stride);
}
//FIXME (try edge emu)
for (y = 0; y < height; y++) {
for (x = -8; x < 0; x += 4) {
const int index = x + y * stride + (8 - 3) * (1 + stride) + 8; //FIXME silly offset
uint8_t *src = p_src + index;
int16_t *tp = temp + 4 * x;
dctA_c(tp + 4 * 8, src, stride);
}
for (x = 0; x < width; ) {
const int qps = 3 + is_luma;
int qp;
int end = FFMIN(x + 8, width);
if (p->qp)
qp = p->qp;
else {
qp = qp_store[ (FFMIN(x, width - 1) >> qps) + (FFMIN(y, height - 1) >> qps) * qp_stride];
qp = ff_norm_qscale(qp, p->qscale_type);
}
for (; x < end; x++) {
const int index = x + y * stride + (8 - 3) * (1 + stride) + 8; //FIXME silly offset
uint8_t *src = p_src + index;
int16_t *tp = temp + 4 * x;
int v;
if ((x & 3) == 0)
dctA_c(tp + 4 * 8, src, stride);
p->dctB(block, tp);
v = p->requantize(p, block, qp);
v = (v + dither[y & 7][x & 7]) >> 6;
if ((unsigned)v > 255)
v = (-v) >> 31;
dst[x + y * dst_stride] = v;
}
}
}
}
static const enum AVPixelFormat pix_fmts[] = {
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P,
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P,
AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV440P,
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ440P,
AV_PIX_FMT_GBRP,
AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE
};
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
PP7Context *pp7 = ctx->priv;
const int h = FFALIGN(inlink->h + 16, 16);
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
pp7->hsub = desc->log2_chroma_w;
pp7->vsub = desc->log2_chroma_h;
pp7->temp_stride = FFALIGN(inlink->w + 16, 16);
pp7->src = av_malloc_array(pp7->temp_stride, (h + 8) * sizeof(uint8_t));
if (!pp7->src)
return AVERROR(ENOMEM);
init_thres2(pp7);
switch (pp7->mode) {
case 0: pp7->requantize = hardthresh_c; break;
case 1: pp7->requantize = softthresh_c; break;
default:
case 2: pp7->requantize = mediumthresh_c; break;
}
pp7->dctB = dctB_c;
#if ARCH_X86
ff_pp7_init_x86(pp7);
#endif
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
PP7Context *pp7 = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out = in;
int qp_stride = 0;
int8_t *qp_table = NULL;
if (!pp7->qp) {
int ret = ff_qp_table_extract(in, &qp_table, &qp_stride, NULL, &pp7->qscale_type);
if (ret < 0) {
av_frame_free(&in);
return ret;
}
}
if (!ctx->is_disabled) {
const int cw = AV_CEIL_RSHIFT(inlink->w, pp7->hsub);
const int ch = AV_CEIL_RSHIFT(inlink->h, pp7->vsub);
/* get a new frame if in-place is not possible or if the dimensions
* are not multiple of 8 */
if (!av_frame_is_writable(in) || (inlink->w & 7) || (inlink->h & 7)) {
const int aligned_w = FFALIGN(inlink->w, 8);
const int aligned_h = FFALIGN(inlink->h, 8);
out = ff_get_video_buffer(outlink, aligned_w, aligned_h);
if (!out) {
av_frame_free(&in);
av_freep(&qp_table);
return AVERROR(ENOMEM);
}
av_frame_copy_props(out, in);
out->width = in->width;
out->height = in->height;
}
if (qp_table || pp7->qp) {
filter(pp7, out->data[0], in->data[0], out->linesize[0], in->linesize[0],
inlink->w, inlink->h, qp_table, qp_stride, 1);
filter(pp7, out->data[1], in->data[1], out->linesize[1], in->linesize[1],
cw, ch, qp_table, qp_stride, 0);
filter(pp7, out->data[2], in->data[2], out->linesize[2], in->linesize[2],
cw, ch, qp_table, qp_stride, 0);
emms_c();
}
}
if (in != out) {
if (in->data[3])
av_image_copy_plane(out->data[3], out->linesize[3],
in ->data[3], in ->linesize[3],
inlink->w, inlink->h);
av_frame_free(&in);
}
av_freep(&qp_table);
return ff_filter_frame(outlink, out);
}
static av_cold void uninit(AVFilterContext *ctx)
{
PP7Context *pp7 = ctx->priv;
av_freep(&pp7->src);
}
static const AVFilterPad pp7_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input,
.filter_frame = filter_frame,
},
};
const AVFilter ff_vf_pp7 = {
.name = "pp7",
.description = NULL_IF_CONFIG_SMALL("Apply Postprocessing 7 filter."),
.priv_size = sizeof(PP7Context),
.uninit = uninit,
FILTER_INPUTS(pp7_inputs),
FILTER_OUTPUTS(ff_video_default_filterpad),
FILTER_PIXFMTS_ARRAY(pix_fmts),
.priv_class = &pp7_class,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
};
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