216 lines
7.2 KiB
C
216 lines
7.2 KiB
C
/*
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* Copyright (C) 2006-2011 Michael Niedermayer <michaelni@gmx.at>
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* 2010 James Darnley <james.darnley@gmail.com>
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/avassert.h"
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#include "libavutil/imgutils.h"
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#include "internal.h"
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#include "yadif.h"
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static int return_frame(AVFilterContext *ctx, int is_second)
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{
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YADIFContext *yadif = ctx->priv;
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AVFilterLink *link = ctx->outputs[0];
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int tff, ret;
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if (yadif->parity == -1) {
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tff = yadif->cur->interlaced_frame ?
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yadif->cur->top_field_first : 1;
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} else {
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tff = yadif->parity ^ 1;
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}
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if (is_second) {
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yadif->out = ff_get_video_buffer(link, link->w, link->h);
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if (!yadif->out)
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return AVERROR(ENOMEM);
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av_frame_copy_props(yadif->out, yadif->cur);
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yadif->out->interlaced_frame = 0;
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if (yadif->current_field == YADIF_FIELD_BACK_END)
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yadif->current_field = YADIF_FIELD_END;
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}
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yadif->filter(ctx, yadif->out, tff ^ !is_second, tff);
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if (is_second) {
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int64_t cur_pts = yadif->cur->pts;
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int64_t next_pts = yadif->next->pts;
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if (next_pts != AV_NOPTS_VALUE && cur_pts != AV_NOPTS_VALUE) {
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yadif->out->pts = cur_pts + next_pts;
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} else {
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yadif->out->pts = AV_NOPTS_VALUE;
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}
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}
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ret = ff_filter_frame(ctx->outputs[0], yadif->out);
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yadif->frame_pending = (yadif->mode&1) && !is_second;
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return ret;
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}
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static int checkstride(YADIFContext *yadif, const AVFrame *a, const AVFrame *b)
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{
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int i;
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for (i = 0; i < yadif->csp->nb_components; i++)
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if (a->linesize[i] != b->linesize[i])
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return 1;
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return 0;
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}
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static void fixstride(AVFilterLink *link, AVFrame *f)
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{
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AVFrame *dst = ff_default_get_video_buffer(link, f->width, f->height);
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if(!dst)
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return;
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av_frame_copy_props(dst, f);
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av_image_copy(dst->data, dst->linesize,
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(const uint8_t **)f->data, f->linesize,
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dst->format, dst->width, dst->height);
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av_frame_unref(f);
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av_frame_move_ref(f, dst);
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av_frame_free(&dst);
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}
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int ff_yadif_filter_frame(AVFilterLink *link, AVFrame *frame)
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{
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AVFilterContext *ctx = link->dst;
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YADIFContext *yadif = ctx->priv;
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av_assert0(frame);
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if (yadif->frame_pending)
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return_frame(ctx, 1);
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if (yadif->prev)
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av_frame_free(&yadif->prev);
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yadif->prev = yadif->cur;
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yadif->cur = yadif->next;
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yadif->next = frame;
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if (!yadif->cur) {
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yadif->cur = av_frame_clone(yadif->next);
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if (!yadif->cur)
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return AVERROR(ENOMEM);
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yadif->current_field = YADIF_FIELD_END;
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}
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if (checkstride(yadif, yadif->next, yadif->cur)) {
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av_log(ctx, AV_LOG_VERBOSE, "Reallocating frame due to differing stride\n");
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fixstride(link, yadif->next);
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}
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if (checkstride(yadif, yadif->next, yadif->cur))
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fixstride(link, yadif->cur);
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if (yadif->prev && checkstride(yadif, yadif->next, yadif->prev))
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fixstride(link, yadif->prev);
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if (checkstride(yadif, yadif->next, yadif->cur) || (yadif->prev && checkstride(yadif, yadif->next, yadif->prev))) {
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av_log(ctx, AV_LOG_ERROR, "Failed to reallocate frame\n");
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return -1;
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}
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if (!yadif->prev)
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return 0;
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if ((yadif->deint && !yadif->cur->interlaced_frame) ||
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ctx->is_disabled ||
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(yadif->deint && !yadif->prev->interlaced_frame && yadif->prev->repeat_pict) ||
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(yadif->deint && !yadif->next->interlaced_frame && yadif->next->repeat_pict)
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) {
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yadif->out = av_frame_clone(yadif->cur);
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if (!yadif->out)
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return AVERROR(ENOMEM);
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av_frame_free(&yadif->prev);
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if (yadif->out->pts != AV_NOPTS_VALUE)
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yadif->out->pts *= 2;
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return ff_filter_frame(ctx->outputs[0], yadif->out);
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}
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yadif->out = ff_get_video_buffer(ctx->outputs[0], link->w, link->h);
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if (!yadif->out)
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return AVERROR(ENOMEM);
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av_frame_copy_props(yadif->out, yadif->cur);
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yadif->out->interlaced_frame = 0;
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if (yadif->out->pts != AV_NOPTS_VALUE)
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yadif->out->pts *= 2;
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return return_frame(ctx, 0);
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}
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int ff_yadif_request_frame(AVFilterLink *link)
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{
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AVFilterContext *ctx = link->src;
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YADIFContext *yadif = ctx->priv;
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int ret;
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if (yadif->frame_pending) {
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return_frame(ctx, 1);
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return 0;
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}
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if (yadif->eof)
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return AVERROR_EOF;
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ret = ff_request_frame(ctx->inputs[0]);
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if (ret == AVERROR_EOF && yadif->cur) {
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AVFrame *next = av_frame_clone(yadif->next);
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if (!next)
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return AVERROR(ENOMEM);
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yadif->current_field = YADIF_FIELD_BACK_END;
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next->pts = yadif->next->pts * 2 - yadif->cur->pts;
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ff_yadif_filter_frame(ctx->inputs[0], next);
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yadif->eof = 1;
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} else if (ret < 0) {
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return ret;
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}
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return 0;
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}
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#define OFFSET(x) offsetof(YADIFContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
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#define CONST(name, help, val, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, INT_MIN, INT_MAX, FLAGS, unit }
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const AVOption ff_yadif_options[] = {
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{ "mode", "specify the interlacing mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=YADIF_MODE_SEND_FRAME}, 0, 3, FLAGS, "mode"},
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CONST("send_frame", "send one frame for each frame", YADIF_MODE_SEND_FRAME, "mode"),
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CONST("send_field", "send one frame for each field", YADIF_MODE_SEND_FIELD, "mode"),
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CONST("send_frame_nospatial", "send one frame for each frame, but skip spatial interlacing check", YADIF_MODE_SEND_FRAME_NOSPATIAL, "mode"),
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CONST("send_field_nospatial", "send one frame for each field, but skip spatial interlacing check", YADIF_MODE_SEND_FIELD_NOSPATIAL, "mode"),
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{ "parity", "specify the assumed picture field parity", OFFSET(parity), AV_OPT_TYPE_INT, {.i64=YADIF_PARITY_AUTO}, -1, 1, FLAGS, "parity" },
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CONST("tff", "assume top field first", YADIF_PARITY_TFF, "parity"),
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CONST("bff", "assume bottom field first", YADIF_PARITY_BFF, "parity"),
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CONST("auto", "auto detect parity", YADIF_PARITY_AUTO, "parity"),
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{ "deint", "specify which frames to deinterlace", OFFSET(deint), AV_OPT_TYPE_INT, {.i64=YADIF_DEINT_ALL}, 0, 1, FLAGS, "deint" },
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CONST("all", "deinterlace all frames", YADIF_DEINT_ALL, "deint"),
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CONST("interlaced", "only deinterlace frames marked as interlaced", YADIF_DEINT_INTERLACED, "deint"),
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{ NULL }
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};
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