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-rw-r--r--libavfilter/yadif_common.c209
1 files changed, 209 insertions, 0 deletions
diff --git a/libavfilter/yadif_common.c b/libavfilter/yadif_common.c
new file mode 100644
index 0000000000..19e8ac5281
--- /dev/null
+++ b/libavfilter/yadif_common.c
@@ -0,0 +1,209 @@
+/*
+ * 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;
+ }
+
+ 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)))
+ return AVERROR(ENOMEM);
+
+ 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);
+
+ 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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