avcodec/v4l2_m2m_enc: Reduce log verbosity for some params

Currently the user gets unhelpful warnings when some default parameters
are not supported by the device. The verbosity of these log messages has
been changed to AV_LOG_DEBUG.
Reviewed-by: Ming Qian <ming.qian@nxp.com>
Signed-off-by: Andriy Gelman <andriy.gelman@gmail.com>

libavcodec/v4l2_m2m_enc.c

@@ -47,7 +47,7 @@ static inline void v4l2_set_timeperframe(V4L2m2mContext *s, unsigned int num, un
         av_log(s->avctx, AV_LOG_WARNING, "Failed to set timeperframe");
 }
 
-static inline void v4l2_set_ext_ctrl(V4L2m2mContext *s, unsigned int id, signed int value, const char *name)
+static inline void v4l2_set_ext_ctrl(V4L2m2mContext *s, unsigned int id, signed int value, const char *name, int log_warning)
 {
     struct v4l2_ext_controls ctrls = { { 0 } };
     struct v4l2_ext_control ctrl = { 0 };
@@ -62,12 +62,13 @@ static inline void v4l2_set_ext_ctrl(V4L2m2mContext *s, unsigned int id, signed
     ctrl.id = id;
 
     if (ioctl(s->fd, VIDIOC_S_EXT_CTRLS, &ctrls) < 0)
-        av_log(s->avctx, AV_LOG_WARNING, "Failed to set %s: %s\n", name, strerror(errno));
+        av_log(s->avctx, log_warning || errno != EINVAL ? AV_LOG_WARNING : AV_LOG_DEBUG,
+               "Failed to set %s: %s\n", name, strerror(errno));
     else
         av_log(s->avctx, AV_LOG_DEBUG, "Encoder: %s = %d\n", name, value);
 }
 
-static inline int v4l2_get_ext_ctrl(V4L2m2mContext *s, unsigned int id, signed int *value, const char *name)
+static inline int v4l2_get_ext_ctrl(V4L2m2mContext *s, unsigned int id, signed int *value, const char *name, int log_warning)
 {
     struct v4l2_ext_controls ctrls = { { 0 } };
     struct v4l2_ext_control ctrl = { 0 };
@@ -83,7 +84,8 @@ static inline int v4l2_get_ext_ctrl(V4L2m2mContext *s, unsigned int id, signed i
 
     ret = ioctl(s->fd, VIDIOC_G_EXT_CTRLS, &ctrls);
     if (ret < 0) {
-        av_log(s->avctx, AV_LOG_WARNING, "Failed to get %s\n", name);
+        av_log(s->avctx, log_warning || errno != EINVAL ? AV_LOG_WARNING : AV_LOG_DEBUG,
+               "Failed to get %s\n", name);
         return ret;
     }
 
@@ -145,8 +147,8 @@ static int v4l2_check_b_frame_support(V4L2m2mContext *s)
     if (s->avctx->max_b_frames)
         av_log(s->avctx, AV_LOG_WARNING, "Encoder does not support b-frames yet\n");
 
-    v4l2_set_ext_ctrl(s, MPEG_CID(B_FRAMES), 0, "number of B-frames");
-    v4l2_get_ext_ctrl(s, MPEG_CID(B_FRAMES), &s->avctx->max_b_frames, "number of B-frames");
+    v4l2_set_ext_ctrl(s, MPEG_CID(B_FRAMES), 0, "number of B-frames", 0);
+    v4l2_get_ext_ctrl(s, MPEG_CID(B_FRAMES), &s->avctx->max_b_frames, "number of B-frames", 0);
     if (s->avctx->max_b_frames == 0)
         return 0;
 
@@ -188,9 +190,9 @@ static int v4l2_prepare_encoder(V4L2m2mContext *s)
         v4l2_set_timeperframe(s, avctx->framerate.den, avctx->framerate.num);
 
     /* set ext ctrls */
-    v4l2_set_ext_ctrl(s, MPEG_CID(HEADER_MODE), MPEG_VIDEO(HEADER_MODE_SEPARATE), "header mode");
-    v4l2_set_ext_ctrl(s, MPEG_CID(BITRATE) , avctx->bit_rate, "bit rate");
-    v4l2_set_ext_ctrl(s, MPEG_CID(GOP_SIZE), avctx->gop_size,"gop size");
+    v4l2_set_ext_ctrl(s, MPEG_CID(HEADER_MODE), MPEG_VIDEO(HEADER_MODE_SEPARATE), "header mode", 0);
+    v4l2_set_ext_ctrl(s, MPEG_CID(BITRATE) , avctx->bit_rate, "bit rate", 1);
+    v4l2_set_ext_ctrl(s, MPEG_CID(GOP_SIZE), avctx->gop_size,"gop size", 1);
 
     av_log(avctx, AV_LOG_DEBUG,
         "Encoder Context: id (%d), profile (%d), frame rate(%d/%d), number b-frames (%d), "
@@ -200,26 +202,30 @@ static int v4l2_prepare_encoder(V4L2m2mContext *s)
 
     switch (avctx->codec_id) {
     case AV_CODEC_ID_H264:
+        if (avctx->profile != FF_PROFILE_UNKNOWN) {
         val = v4l2_h264_profile_from_ff(avctx->profile);
         if (val < 0)
             av_log(avctx, AV_LOG_WARNING, "h264 profile not found\n");
         else
-            v4l2_set_ext_ctrl(s, MPEG_CID(H264_PROFILE), val, "h264 profile");
+            v4l2_set_ext_ctrl(s, MPEG_CID(H264_PROFILE), val, "h264 profile", 1);
+        }
         qmin_cid = MPEG_CID(H264_MIN_QP);
         qmax_cid = MPEG_CID(H264_MAX_QP);
         qmin = 0;
         qmax = 51;
         break;
     case AV_CODEC_ID_MPEG4:
+        if (avctx->profile != FF_PROFILE_UNKNOWN) {
         val = v4l2_mpeg4_profile_from_ff(avctx->profile);
         if (val < 0)
             av_log(avctx, AV_LOG_WARNING, "mpeg4 profile not found\n");
         else
-            v4l2_set_ext_ctrl(s, MPEG_CID(MPEG4_PROFILE), val, "mpeg4 profile");
+            v4l2_set_ext_ctrl(s, MPEG_CID(MPEG4_PROFILE), val, "mpeg4 profile", 1);
+        }
         qmin_cid = MPEG_CID(MPEG4_MIN_QP);
         qmax_cid = MPEG_CID(MPEG4_MAX_QP);
         if (avctx->flags & AV_CODEC_FLAG_QPEL)
-            v4l2_set_ext_ctrl(s, MPEG_CID(MPEG4_QPEL), 1, "qpel");
+            v4l2_set_ext_ctrl(s, MPEG_CID(MPEG4_QPEL), 1, "qpel", 1);
         qmin = 1;
         qmax = 31;
         break;
@@ -248,8 +254,8 @@ static int v4l2_prepare_encoder(V4L2m2mContext *s)
     if (qmin != avctx->qmin || qmax != avctx->qmax)
         av_log(avctx, AV_LOG_WARNING, "Encoder adjusted: qmin (%d), qmax (%d)\n", qmin, qmax);
 
-    v4l2_set_ext_ctrl(s, qmin_cid, qmin, "minimum video quantizer scale");
-    v4l2_set_ext_ctrl(s, qmax_cid, qmax, "maximum video quantizer scale");
+    v4l2_set_ext_ctrl(s, qmin_cid, qmin, "minimum video quantizer scale", 0);
+    v4l2_set_ext_ctrl(s, qmax_cid, qmax, "maximum video quantizer scale", 0);
 
     return 0;
 }
@@ -261,7 +267,7 @@ static int v4l2_send_frame(AVCodecContext *avctx, const AVFrame *frame)
 
 #ifdef V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME
     if (frame && frame->pict_type == AV_PICTURE_TYPE_I)
-        v4l2_set_ext_ctrl(s, MPEG_CID(FORCE_KEY_FRAME), 0, "force key frame");
+        v4l2_set_ext_ctrl(s, MPEG_CID(FORCE_KEY_FRAME), 0, "force key frame", 1);
 #endif
 
     return ff_v4l2_context_enqueue_frame(output, frame);