| /* |
| * 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->csp->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 } |
| }; |
