libavfilter/overlay_qsv: Add QSV overlay vpp filter

The filter supports two inputs and (implicitly) scaling the second input
during composition, unlike the software overlay.

The code has been separated into common interface and qsv overlay
implementation. The common part mainly creates the qsv session and
manages the surface which is nearly the same for all qsv filters.
So the qsvvpp.c/qsvvpp.h API can be used by other QSV vpp filters
to reduce code redundancy.

Usage:
 -hwaccel qsv -c:v mpeg2_qsv -r 25 -i in.m2v -hwaccel qsv -c:v h264_qsv
 -i in.h264 -filter_complex
 "overlay_qsv=eof_action=repeat:x=(W-w)/2:y=(H-h)/2"  -b 2M -maxrate 3M
 -c:v h264_qsv -y out.h264

Two inputs should have different sizes otherwise one will be completely
covered or you need to scale the second input as follows:
  -hwaccel qsv -c:v mpeg2_qsv -r 25 -i in.m2v -hwaccel qsv -c:v h264_qsv
  -i in.h264 -filter_complex
  "overlay_qsv=w=720:h=576:x=(W-w)/2:y=(H-h)/2" -b 2M -maxrate 3M -c:v
  h264_qsv -y out.h264

  Signed-off-by: ChaoX A Liu <chaox.a.liu@gmail.com>
  Signed-off-by: Zhengxu Huang <zhengxu.maxwell@gmail.com>
  Signed-off-by: Andrew Zhang <huazh407@gmail.com>
  Change-Id: I5c381febb0af6e2f9622c54ba00490ab99d48297
  Signed-off-by: Maxym Dmytrychenko <maxim.d33@gmail.com>

1 files changed, 66 insertions, 0 deletions

diff --git a/libavfilter/qsvvpp.h b/libavfilter/qsvvpp.h
new file mode 100644
index 0000000000..082c0a8994
--- /dev/null
+++ b/libavfilter/qsvvpp.h
@@ -0,0 +1,66 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Intel Quick Sync Video VPP base function
+ */
+
+#ifndef AVFILTER_QSVVPP_H
+#define AVFILTER_QSVVPP_H
+
+#include <mfx/mfxvideo.h>
+
+#include "avfilter.h"
+
+#define FF_INLINK_IDX(link)  ((int)((link)->dstpad - (link)->dst->input_pads))
+#define FF_OUTLINK_IDX(link) ((int)((link)->srcpad - (link)->src->output_pads))
+
+typedef struct QSVVPPContext QSVVPPContext;
+
+typedef struct QSVVPPCrop {
+    int in_idx;        ///< Input index
+    int x, y, w, h;    ///< Crop rectangle
+} QSVVPPCrop;
+
+typedef struct QSVVPPParam {
+    /* default is ff_filter_frame */
+    int (*filter_frame)(AVFilterLink *outlink, AVFrame *frame);
+
+    /* To fill with MFX enhanced filter configurations */
+    int num_ext_buf;
+    mfxExtBuffer **ext_buf;
+
+    /* Real output format */
+    enum AVPixelFormat out_sw_format;
+
+    /* Crop information for each input, if needed */
+    int num_crop;
+    QSVVPPCrop *crop;
+} QSVVPPParam;
+
+/* create and initialize the QSV session */
+int ff_qsvvpp_create(AVFilterContext *avctx, QSVVPPContext **vpp, QSVVPPParam *param);
+
+/* release the resources (eg.surfaces) */
+int ff_qsvvpp_free(QSVVPPContext **vpp);
+
+/* vpp filter frame and call the cb if needed */
+int ff_qsvvpp_filter_frame(QSVVPPContext *vpp, AVFilterLink *inlink, AVFrame *frame);
+
+#endif /* AVFILTER_QSVVPP_H */