YADIF_DEINT_INTERLACED = 1, ///< only deinterlace frames marked as interlaced
};
+enum YADIFCurrentField {
+ YADIF_FIELD_BACK_END = -1, ///< The last frame in a sequence
+ YADIF_FIELD_END = 0, ///< The first or last field in a sequence
+ YADIF_FIELD_NORMAL = 1, ///< A normal field in the middle of a sequence
+};
+
typedef struct YADIFContext {
const AVClass *class;
int eof;
uint8_t *temp_line;
int temp_line_size;
+
+ /*
+ * An algorithm that treats first and/or last fields in a sequence
+ * differently can use this to detect those cases. It is the algorithm's
+ * responsibility to set the value to YADIF_FIELD_NORMAL after processing
+ * the first field.
+ */
+ int current_field; ///< YADIFCurrentField
} YADIFContext;
void ff_yadif_init_x86(YADIFContext *yadif);
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);
yadif->cur = yadif->next;
yadif->next = frame;
- if (!yadif->cur &&
- !(yadif->cur = av_frame_clone(yadif->next)))
- return AVERROR(ENOMEM);
+ 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");
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);