From e9b9898be9c2cbf007b5e6580d4f90c93163502b Mon Sep 17 00:00:00 2001
From: Michael Grzeschik <m.grzeschik@pengutronix.de>
Date: Tue, 21 Feb 2023 02:10:52 +0100
Subject: [PATCH 47/68] v4l2codecs: encoder: Add h264 code to v4l2 encoder
 class

Upstream-Status: Pending
---
 sys/v4l2codecs/gstv4l2encoder.c | 25 +++++++++++++++++++++++++
 sys/v4l2codecs/gstv4l2encoder.h |  2 ++
 2 files changed, 27 insertions(+)

diff --git a/sys/v4l2codecs/gstv4l2encoder.c b/sys/v4l2codecs/gstv4l2encoder.c
index 0938bb1..cded8bf 100644
--- a/sys/v4l2codecs/gstv4l2encoder.c
+++ b/sys/v4l2codecs/gstv4l2encoder.c
@@ -1366,3 +1366,28 @@ gst_v4l2_codec_vp8_enc_get_qp_range (GstV4l2Encoder * self,
 
   return TRUE;
 }
+
+gboolean
+gst_v4l2_codec_h264_enc_get_qp_range (GstV4l2Encoder * self,
+    guint * qp_min, guint * qp_max)
+{
+  gint ret;
+  struct v4l2_query_ext_ctrl control = {
+    .id = V4L2_CID_STATELESS_H264_ENCODE_RC,
+  };
+
+  *qp_max = 127;
+  *qp_min = 0;
+
+  ret = ioctl (self->video_fd, VIDIOC_QUERY_EXT_CTRL, &control);
+  if (ret < 0) {
+    GST_DEBUG_OBJECT (self, "unable to retrieve encoder qp, use default");
+    return FALSE;
+  }
+
+  *qp_max = control.maximum;
+  *qp_min = control.minimum;
+  GST_DEBUG_OBJECT (self, "encoder qp min %d qp max %d", *qp_min, *qp_max);
+
+  return TRUE;
+}
diff --git a/sys/v4l2codecs/gstv4l2encoder.h b/sys/v4l2codecs/gstv4l2encoder.h
index 9acb0e3..e7f44ba 100644
--- a/sys/v4l2codecs/gstv4l2encoder.h
+++ b/sys/v4l2codecs/gstv4l2encoder.h
@@ -134,6 +134,8 @@ gboolean          gst_v4l2_encoder_request_failed (GstV4l2Request * request);
 
 gboolean	  gst_v4l2_codec_vp8_enc_get_qp_range (GstV4l2Encoder * self, guint * qp_min, guint * qp_max);
 
+gboolean	  gst_v4l2_codec_h264_enc_get_qp_range (GstV4l2Encoder * self, guint * qp_min, guint * qp_max);
+
 G_END_DECLS
 
 #endif /* __GST_V4L2_ENCODER_H__ */
-- 
2.25.1