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/*
* Copyright (C) 2006-2011 Michael Niedermayer <michaelni@gmx.at>
* 2010 James Darnley <james.darnley@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 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/avassert.h"
#include "libavutil/imgutils.h"
#include "internal.h"
#include "yadif.h"
static int return_frame(AVFilterContext *ctx, int is_second)
{
YADIFContext *yadif = ctx->priv;
AVFilterLink *link = ctx->outputs[0];
int tff, ret;
if (yadif->parity == -1) {
tff = yadif->cur->interlaced_frame ?
yadif->cur->top_field_first : 1;
} else {
tff = yadif->parity ^ 1;
}
if (is_second) {
yadif->out = ff_get_video_buffer(link, link->w, link->h);
if (!yadif->out)
return AVERROR(ENOMEM);
av_frame_copy_props(yadif->out, yadif->cur);
yadif->out->interlaced_frame = 0;
if (yadif->current_field == YADIF_FIELD_BACK_END)
yadif->current_field = YADIF_FIELD_END;
}
yadif->filter(ctx, yadif->out, tff ^ !is_second, tff);
if (is_second) {
int64_t cur_pts = yadif->cur->pts;
int64_t next_pts = yadif->next->pts;
if (next_pts != AV_NOPTS_VALUE && cur_pts != AV_NOPTS_VALUE) {
yadif->out->pts = cur_pts + next_pts;
} else {
yadif->out->pts = AV_NOPTS_VALUE;
}
}
ret = ff_filter_frame(ctx->outputs[0], yadif->out);
yadif->frame_pending = (yadif->mode&1) && !is_second;
return ret;
}
static int checkstride(YADIFContext *yadif, const AVFrame *a, const AVFrame *b)
{
int i;
for (i = 0; i < yadif->nb_components; i++)
if (a->linesize[i] != b->linesize[i])
return 1;
return 0;
}
static void fixstride(AVFilterLink *link, AVFrame *f)
{
AVFrame *dst = ff_default_get_video_buffer(link, f->width, f->height);
if(!dst)
return;
av_frame_copy_props(dst, f);
av_image_copy(dst->data, dst->linesize,
(const uint8_t **)f->data, f->linesize,
dst->format, dst->width, dst->height);
av_frame_unref(f);
av_frame_move_ref(f, dst);
av_frame_free(&dst);
}
int ff_yadif_filter_frame(AVFilterLink *link, AVFrame *frame)
{
AVFilterContext *ctx = link->dst;
YADIFContext *yadif = ctx->priv;
av_assert0(frame);
if (yadif->frame_pending)
return_frame(ctx, 1);
if (yadif->prev)
av_frame_free(&yadif->prev);
yadif->prev = yadif->cur;
yadif->cur = yadif->next;
yadif->next = frame;
if (!yadif->cur) {
yadif->cur = av_frame_clone(yadif->next);
if (!yadif->cur)
return AVERROR(ENOMEM);
yadif->current_field = YADIF_FIELD_END;
}
if (checkstride(yadif, yadif->next, yadif->cur)) {
av_log(ctx, AV_LOG_VERBOSE, "Reallocating frame due to differing stride\n");
fixstride(link, yadif->next);
}
if (checkstride(yadif, yadif->next, yadif->cur))
fixstride(link, yadif->cur);
if (yadif->prev && checkstride(yadif, yadif->next, yadif->prev))
fixstride(link, yadif->prev);
if (checkstride(yadif, yadif->next, yadif->cur) || (yadif->prev && checkstride(yadif, yadif->next, yadif->prev))) {
av_log(ctx, AV_LOG_ERROR, "Failed to reallocate frame\n");
return -1;
}
if (!yadif->prev)
return 0;
if ((yadif->deint && !yadif->cur->interlaced_frame) ||
ctx->is_disabled ||
(yadif->deint && !yadif->prev->interlaced_frame && yadif->prev->repeat_pict) ||
(yadif->deint && !yadif->next->interlaced_frame && yadif->next->repeat_pict)
) {
yadif->out = av_frame_clone(yadif->cur);
if (!yadif->out)
return AVERROR(ENOMEM);
av_frame_free(&yadif->prev);
if (yadif->out->pts != AV_NOPTS_VALUE)
yadif->out->pts *= 2;
return ff_filter_frame(ctx->outputs[0], yadif->out);
}
yadif->out = ff_get_video_buffer(ctx->outputs[0], link->w, link->h);
if (!yadif->out)
return AVERROR(ENOMEM);
av_frame_copy_props(yadif->out, yadif->cur);
yadif->out->interlaced_frame = 0;
if (yadif->out->pts != AV_NOPTS_VALUE)
yadif->out->pts *= 2;
return return_frame(ctx, 0);
}
int ff_yadif_request_frame(AVFilterLink *link)
{
AVFilterContext *ctx = link->src;
YADIFContext *yadif = ctx->priv;
int ret;
if (yadif->frame_pending) {
return_frame(ctx, 1);
return 0;
}
if (yadif->eof)
return AVERROR_EOF;
ret = ff_request_frame(ctx->inputs[0]);
if (ret == AVERROR_EOF && yadif->cur) {
AVFrame *next = av_frame_clone(yadif->next);
if (!next)
return AVERROR(ENOMEM);
yadif->current_field = YADIF_FIELD_BACK_END;
next->pts = yadif->next->pts * 2 - yadif->cur->pts;
ff_yadif_filter_frame(ctx->inputs[0], next);
yadif->eof = 1;
} else if (ret < 0) {
return ret;
}
return 0;
}
#define OFFSET(x) offsetof(YADIFContext, 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}, INT_MIN, INT_MAX, FLAGS, unit }
const AVOption ff_yadif_options[] = {
{ "mode", "specify the interlacing mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=YADIF_MODE_SEND_FRAME}, 0, 3, FLAGS, "mode"},
CONST("send_frame", "send one frame for each frame", YADIF_MODE_SEND_FRAME, "mode"),
CONST("send_field", "send one frame for each field", YADIF_MODE_SEND_FIELD, "mode"),
CONST("send_frame_nospatial", "send one frame for each frame, but skip spatial interlacing check", YADIF_MODE_SEND_FRAME_NOSPATIAL, "mode"),
CONST("send_field_nospatial", "send one frame for each field, but skip spatial interlacing check", YADIF_MODE_SEND_FIELD_NOSPATIAL, "mode"),
{ "parity", "specify the assumed picture field parity", OFFSET(parity), AV_OPT_TYPE_INT, {.i64=YADIF_PARITY_AUTO}, -1, 1, FLAGS, "parity" },
CONST("tff", "assume top field first", YADIF_PARITY_TFF, "parity"),
CONST("bff", "assume bottom field first", YADIF_PARITY_BFF, "parity"),
CONST("auto", "auto detect parity", YADIF_PARITY_AUTO, "parity"),
{ "deint", "specify which frames to deinterlace", OFFSET(deint), AV_OPT_TYPE_INT, {.i64=YADIF_DEINT_ALL}, 0, 1, FLAGS, "deint" },
CONST("all", "deinterlace all frames", YADIF_DEINT_ALL, "deint"),
CONST("interlaced", "only deinterlace frames marked as interlaced", YADIF_DEINT_INTERLACED, "deint"),
{ NULL }
};
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