427 lines
14 KiB
C
427 lines
14 KiB
C
/*
|
|
* Copyright (C) 2012 British Broadcasting Corporation, All Rights Reserved
|
|
* Author of de-interlace algorithm: Jim Easterbrook for BBC R&D
|
|
* Based on the process described by Martin Weston for BBC R&D
|
|
* Author of FFmpeg filter: Mark Himsley for BBC Broadcast Systems Development
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include "libavutil/common.h"
|
|
#include "libavutil/imgutils.h"
|
|
#include "libavutil/opt.h"
|
|
#include "libavutil/pixdesc.h"
|
|
#include "avfilter.h"
|
|
#include "formats.h"
|
|
#include "internal.h"
|
|
#include "video.h"
|
|
|
|
typedef struct W3FDIFContext {
|
|
const AVClass *class;
|
|
int filter; ///< 0 is simple, 1 is more complex
|
|
int deint; ///< which frames to deinterlace
|
|
int linesize[4]; ///< bytes of pixel data per line for each plane
|
|
int planeheight[4]; ///< height of each plane
|
|
int field; ///< which field are we on, 0 or 1
|
|
int eof;
|
|
int nb_planes;
|
|
AVFrame *prev, *cur, *next; ///< previous, current, next frames
|
|
int32_t **work_line; ///< lines we are calculating
|
|
int nb_threads;
|
|
} W3FDIFContext;
|
|
|
|
#define OFFSET(x) offsetof(W3FDIFContext, x)
|
|
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
|
|
#define CONST(name, help, val, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, 0, 0, FLAGS, unit }
|
|
|
|
static const AVOption w3fdif_options[] = {
|
|
{ "filter", "specify the filter", OFFSET(filter), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS, "filter" },
|
|
CONST("simple", NULL, 0, "filter"),
|
|
CONST("complex", NULL, 1, "filter"),
|
|
{ "deint", "specify which frames to deinterlace", OFFSET(deint), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "deint" },
|
|
CONST("all", "deinterlace all frames", 0, "deint"),
|
|
CONST("interlaced", "only deinterlace frames marked as interlaced", 1, "deint"),
|
|
{ NULL }
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS(w3fdif);
|
|
|
|
static int query_formats(AVFilterContext *ctx)
|
|
{
|
|
static const enum AVPixelFormat pix_fmts[] = {
|
|
AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
|
|
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
|
|
AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
|
|
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
|
|
AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
|
|
AV_PIX_FMT_YUVJ411P,
|
|
AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
|
|
AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
|
|
AV_PIX_FMT_GRAY8,
|
|
AV_PIX_FMT_NONE
|
|
};
|
|
|
|
AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
|
|
if (!fmts_list)
|
|
return AVERROR(ENOMEM);
|
|
return ff_set_common_formats(ctx, fmts_list);
|
|
}
|
|
|
|
static int config_input(AVFilterLink *inlink)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
W3FDIFContext *s = ctx->priv;
|
|
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
|
|
int ret, i;
|
|
|
|
if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
|
|
return ret;
|
|
|
|
s->planeheight[1] = s->planeheight[2] = FF_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
|
|
s->planeheight[0] = s->planeheight[3] = inlink->h;
|
|
|
|
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
|
|
s->nb_threads = ctx->graph->nb_threads;
|
|
s->work_line = av_calloc(s->nb_threads, sizeof(*s->work_line));
|
|
if (!s->work_line)
|
|
return AVERROR(ENOMEM);
|
|
|
|
for (i = 0; i < s->nb_threads; i++) {
|
|
s->work_line[i] = av_calloc(s->linesize[0], sizeof(*s->work_line[0]));
|
|
if (!s->work_line[i])
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int config_output(AVFilterLink *outlink)
|
|
{
|
|
AVFilterLink *inlink = outlink->src->inputs[0];
|
|
|
|
outlink->time_base.num = inlink->time_base.num;
|
|
outlink->time_base.den = inlink->time_base.den * 2;
|
|
outlink->frame_rate.num = inlink->frame_rate.num * 2;
|
|
outlink->frame_rate.den = inlink->frame_rate.den;
|
|
outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Filter coefficients from PH-2071, scaled by 256 * 256.
|
|
* Each set of coefficients has a set for low-frequencies and high-frequencies.
|
|
* n_coef_lf[] and n_coef_hf[] are the number of coefs for simple and more-complex.
|
|
* It is important for later that n_coef_lf[] is even and n_coef_hf[] is odd.
|
|
* coef_lf[][] and coef_hf[][] are the coefficients for low-frequencies
|
|
* and high-frequencies for simple and more-complex mode.
|
|
*/
|
|
static const int8_t n_coef_lf[2] = { 2, 4 };
|
|
static const int32_t coef_lf[2][4] = {{ 32768, 32768, 0, 0},
|
|
{ -1704, 34472, 34472, -1704}};
|
|
static const int8_t n_coef_hf[2] = { 3, 5 };
|
|
static const int32_t coef_hf[2][5] = {{ -4096, 8192, -4096, 0, 0},
|
|
{ 2032, -7602, 11140, -7602, 2032}};
|
|
|
|
typedef struct ThreadData {
|
|
AVFrame *out, *cur, *adj;
|
|
int plane;
|
|
} ThreadData;
|
|
|
|
static int deinterlace_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
|
|
{
|
|
W3FDIFContext *s = ctx->priv;
|
|
ThreadData *td = arg;
|
|
AVFrame *out = td->out;
|
|
AVFrame *cur = td->cur;
|
|
AVFrame *adj = td->adj;
|
|
const int plane = td->plane;
|
|
const int filter = s->filter;
|
|
uint8_t *in_line, *in_lines_cur[5], *in_lines_adj[5];
|
|
uint8_t *out_line, *out_pixel;
|
|
int32_t *work_line, *work_pixel;
|
|
uint8_t *cur_data = cur->data[plane];
|
|
uint8_t *adj_data = adj->data[plane];
|
|
uint8_t *dst_data = out->data[plane];
|
|
const int linesize = s->linesize[plane];
|
|
const int height = s->planeheight[plane];
|
|
const int cur_line_stride = cur->linesize[plane];
|
|
const int adj_line_stride = adj->linesize[plane];
|
|
const int dst_line_stride = out->linesize[plane];
|
|
const int start = (height * jobnr) / nb_jobs;
|
|
const int end = (height * (jobnr+1)) / nb_jobs;
|
|
int i, j, y_in, y_out;
|
|
|
|
/* copy unchanged the lines of the field */
|
|
y_out = start + (s->field == cur->top_field_first) - (start & 1);
|
|
|
|
in_line = cur_data + (y_out * cur_line_stride);
|
|
out_line = dst_data + (y_out * dst_line_stride);
|
|
|
|
while (y_out < end) {
|
|
memcpy(out_line, in_line, linesize);
|
|
y_out += 2;
|
|
in_line += cur_line_stride * 2;
|
|
out_line += dst_line_stride * 2;
|
|
}
|
|
|
|
/* interpolate other lines of the field */
|
|
y_out = start + (s->field != cur->top_field_first) - (start & 1);
|
|
|
|
out_line = dst_data + (y_out * dst_line_stride);
|
|
|
|
while (y_out < end) {
|
|
/* clear workspace */
|
|
memset(s->work_line[jobnr], 0, sizeof(*s->work_line[jobnr]) * linesize);
|
|
|
|
/* get low vertical frequencies from current field */
|
|
for (j = 0; j < n_coef_lf[filter]; j++) {
|
|
y_in = (y_out + 1) + (j * 2) - n_coef_lf[filter];
|
|
|
|
while (y_in < 0)
|
|
y_in += 2;
|
|
while (y_in >= height)
|
|
y_in -= 2;
|
|
|
|
in_lines_cur[j] = cur_data + (y_in * cur_line_stride);
|
|
}
|
|
|
|
work_line = s->work_line[jobnr];
|
|
switch (n_coef_lf[filter]) {
|
|
case 2:
|
|
for (i = 0; i < linesize; i++) {
|
|
*work_line += *in_lines_cur[0]++ * coef_lf[filter][0];
|
|
*work_line++ += *in_lines_cur[1]++ * coef_lf[filter][1];
|
|
}
|
|
break;
|
|
case 4:
|
|
for (i = 0; i < linesize; i++) {
|
|
*work_line += *in_lines_cur[0]++ * coef_lf[filter][0];
|
|
*work_line += *in_lines_cur[1]++ * coef_lf[filter][1];
|
|
*work_line += *in_lines_cur[2]++ * coef_lf[filter][2];
|
|
*work_line++ += *in_lines_cur[3]++ * coef_lf[filter][3];
|
|
}
|
|
}
|
|
|
|
/* get high vertical frequencies from adjacent fields */
|
|
for (j = 0; j < n_coef_hf[filter]; j++) {
|
|
y_in = (y_out + 1) + (j * 2) - n_coef_hf[filter];
|
|
|
|
while (y_in < 0)
|
|
y_in += 2;
|
|
while (y_in >= height)
|
|
y_in -= 2;
|
|
|
|
in_lines_cur[j] = cur_data + (y_in * cur_line_stride);
|
|
in_lines_adj[j] = adj_data + (y_in * adj_line_stride);
|
|
}
|
|
|
|
work_line = s->work_line[jobnr];
|
|
switch (n_coef_hf[filter]) {
|
|
case 3:
|
|
for (i = 0; i < linesize; i++) {
|
|
*work_line += *in_lines_cur[0]++ * coef_hf[filter][0];
|
|
*work_line += *in_lines_adj[0]++ * coef_hf[filter][0];
|
|
*work_line += *in_lines_cur[1]++ * coef_hf[filter][1];
|
|
*work_line += *in_lines_adj[1]++ * coef_hf[filter][1];
|
|
*work_line += *in_lines_cur[2]++ * coef_hf[filter][2];
|
|
*work_line++ += *in_lines_adj[2]++ * coef_hf[filter][2];
|
|
}
|
|
break;
|
|
case 5:
|
|
for (i = 0; i < linesize; i++) {
|
|
*work_line += *in_lines_cur[0]++ * coef_hf[filter][0];
|
|
*work_line += *in_lines_adj[0]++ * coef_hf[filter][0];
|
|
*work_line += *in_lines_cur[1]++ * coef_hf[filter][1];
|
|
*work_line += *in_lines_adj[1]++ * coef_hf[filter][1];
|
|
*work_line += *in_lines_cur[2]++ * coef_hf[filter][2];
|
|
*work_line += *in_lines_adj[2]++ * coef_hf[filter][2];
|
|
*work_line += *in_lines_cur[3]++ * coef_hf[filter][3];
|
|
*work_line += *in_lines_adj[3]++ * coef_hf[filter][3];
|
|
*work_line += *in_lines_cur[4]++ * coef_hf[filter][4];
|
|
*work_line++ += *in_lines_adj[4]++ * coef_hf[filter][4];
|
|
}
|
|
}
|
|
|
|
/* save scaled result to the output frame, scaling down by 256 * 256 */
|
|
work_pixel = s->work_line[jobnr];
|
|
out_pixel = out_line;
|
|
|
|
for (j = 0; j < linesize; j++, out_pixel++, work_pixel++)
|
|
*out_pixel = av_clip(*work_pixel, 0, 255 * 256 * 256) >> 16;
|
|
|
|
/* move on to next line */
|
|
y_out += 2;
|
|
out_line += dst_line_stride * 2;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int filter(AVFilterContext *ctx, int is_second)
|
|
{
|
|
W3FDIFContext *s = ctx->priv;
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
|
AVFrame *out, *adj;
|
|
ThreadData td;
|
|
int plane;
|
|
|
|
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
|
|
if (!out)
|
|
return AVERROR(ENOMEM);
|
|
av_frame_copy_props(out, s->cur);
|
|
out->interlaced_frame = 0;
|
|
|
|
if (!is_second) {
|
|
if (out->pts != AV_NOPTS_VALUE)
|
|
out->pts *= 2;
|
|
} else {
|
|
int64_t cur_pts = s->cur->pts;
|
|
int64_t next_pts = s->next->pts;
|
|
|
|
if (next_pts != AV_NOPTS_VALUE && cur_pts != AV_NOPTS_VALUE) {
|
|
out->pts = cur_pts + next_pts;
|
|
} else {
|
|
out->pts = AV_NOPTS_VALUE;
|
|
}
|
|
}
|
|
|
|
adj = s->field ? s->next : s->prev;
|
|
td.out = out; td.cur = s->cur; td.adj = adj;
|
|
for (plane = 0; plane < s->nb_planes; plane++) {
|
|
td.plane = plane;
|
|
ctx->internal->execute(ctx, deinterlace_slice, &td, NULL, FFMIN(s->planeheight[plane], s->nb_threads));
|
|
}
|
|
|
|
s->field = !s->field;
|
|
|
|
return ff_filter_frame(outlink, out);
|
|
}
|
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
W3FDIFContext *s = ctx->priv;
|
|
int ret;
|
|
|
|
av_frame_free(&s->prev);
|
|
s->prev = s->cur;
|
|
s->cur = s->next;
|
|
s->next = frame;
|
|
|
|
if (!s->cur) {
|
|
s->cur = av_frame_clone(s->next);
|
|
if (!s->cur)
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
if ((s->deint && !s->cur->interlaced_frame) || ctx->is_disabled) {
|
|
AVFrame *out = av_frame_clone(s->cur);
|
|
if (!out)
|
|
return AVERROR(ENOMEM);
|
|
|
|
av_frame_free(&s->prev);
|
|
if (out->pts != AV_NOPTS_VALUE)
|
|
out->pts *= 2;
|
|
return ff_filter_frame(ctx->outputs[0], out);
|
|
}
|
|
|
|
if (!s->prev)
|
|
return 0;
|
|
|
|
ret = filter(ctx, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return filter(ctx, 1);
|
|
}
|
|
|
|
static int request_frame(AVFilterLink *outlink)
|
|
{
|
|
AVFilterContext *ctx = outlink->src;
|
|
W3FDIFContext *s = ctx->priv;
|
|
|
|
do {
|
|
int ret;
|
|
|
|
if (s->eof)
|
|
return AVERROR_EOF;
|
|
|
|
ret = ff_request_frame(ctx->inputs[0]);
|
|
|
|
if (ret == AVERROR_EOF && s->cur) {
|
|
AVFrame *next = av_frame_clone(s->next);
|
|
if (!next)
|
|
return AVERROR(ENOMEM);
|
|
next->pts = s->next->pts * 2 - s->cur->pts;
|
|
filter_frame(ctx->inputs[0], next);
|
|
s->eof = 1;
|
|
} else if (ret < 0) {
|
|
return ret;
|
|
}
|
|
} while (!s->cur);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
|
{
|
|
W3FDIFContext *s = ctx->priv;
|
|
int i;
|
|
|
|
av_frame_free(&s->prev);
|
|
av_frame_free(&s->cur );
|
|
av_frame_free(&s->next);
|
|
|
|
for (i = 0; i < s->nb_threads; i++)
|
|
av_freep(&s->work_line[i]);
|
|
|
|
av_freep(&s->work_line);
|
|
}
|
|
|
|
static const AVFilterPad w3fdif_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.filter_frame = filter_frame,
|
|
.config_props = config_input,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVFilterPad w3fdif_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_output,
|
|
.request_frame = request_frame,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter ff_vf_w3fdif = {
|
|
.name = "w3fdif",
|
|
.description = NULL_IF_CONFIG_SMALL("Apply Martin Weston three field deinterlace."),
|
|
.priv_size = sizeof(W3FDIFContext),
|
|
.priv_class = &w3fdif_class,
|
|
.uninit = uninit,
|
|
.query_formats = query_formats,
|
|
.inputs = w3fdif_inputs,
|
|
.outputs = w3fdif_outputs,
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
|
|
};
|