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nvcodec: Add emit-frame-stats signal

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Add emit-frame-stats property to optionally emit frame stats on each frame

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/9429>
This commit is contained in:
Amotz Terem 2025-07-24 14:31:26 +03:00 committed by GStreamer Marge Bot
parent 7b61be6c43
commit 489e908a92
1 changed files with 54 additions and 0 deletions
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54
subprojects/gst-plugins-bad/sys/nvcodec/gstnvencoder.cpp
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@ -64,8 +64,17 @@ enum
PROP_0,
PROP_CC_INSERT,
PROP_EXTERN_POOL,
PROP_EMIT_FRAME_STATS
};
enum
{
SIGNAL_FRAME_STATS,
LAST_SIGNAL
};
static guint gst_nv_encoder_signals[LAST_SIGNAL] = { 0 };
#define DEFAULT_CC_INSERT GST_NV_ENCODER_SEI_INSERT
struct _GstNvEncoderPrivate
@ -74,11 +83,15 @@ struct _GstNvEncoderPrivate
{
memset (&init_params, 0, sizeof (NV_ENC_INITIALIZE_PARAMS));
memset (&config, 0, sizeof (NV_ENC_CONFIG));
emit_frame_stats = FALSE;
frame_stats = gst_structure_new ("application/x-nvenc-stats",
"frame-idx", G_TYPE_UINT, 0, "frame-avg-qp", G_TYPE_UINT, 0, NULL);
}
~_GstNvEncoderPrivate ()
{
gst_clear_object (&extern_pool);
gst_structure_free (frame_stats);
}
GstCudaContext *context = nullptr;
@ -132,6 +145,8 @@ struct _GstNvEncoderPrivate
/* properties */
GstNvEncoderSeiInsertMode cc_insert = DEFAULT_CC_INSERT;
GstBufferPool *extern_pool = nullptr;
gboolean emit_frame_stats;
GstStructure *frame_stats;
};
/**
@ -211,6 +226,31 @@ gst_nv_encoder_class_init (GstNvEncoderClass * klass)
(GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
GST_PARAM_MUTABLE_READY)));
/**
* GstNvEncoder:emit-frame-stats-signal:
*
* Whether to emit the 'frame-stats' signal for each encoded frame.
*
* Since: 1.28
*/
g_object_class_install_property (object_class, PROP_EMIT_FRAME_STATS,
g_param_spec_boolean ("emit-frame-stats", "Emit Frame stats Signal",
"Emit the 'frame-stats' signal for each encoded frame",
FALSE, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
/**
* GstNvEncoder::frame-stats:
*
* Emitted for each encoded frame if the 'emit-frame-stats' property is TRUE.
* The signal provides a #GstStructure containing per-frame statistics such as
* "frame-idx" (frame index) and "frame-avg-qp" (average quantization parameter).
*
* Since: 1.28
*/
gst_nv_encoder_signals[SIGNAL_FRAME_STATS] =
g_signal_new ("frame-stats", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, nullptr, nullptr, nullptr, G_TYPE_NONE, 1,
GST_TYPE_STRUCTURE | G_SIGNAL_TYPE_STATIC_SCOPE);
element_class->set_context = GST_DEBUG_FUNCPTR (gst_nv_encoder_set_context);
@ -300,6 +340,9 @@ gst_nv_encoder_set_property (GObject * object, guint prop_id,
}
}
break;
case PROP_EMIT_FRAME_STATS:
priv->emit_frame_stats = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -320,6 +363,9 @@ gst_nv_encoder_get_property (GObject * object, guint prop_id, GValue * value,
case PROP_EXTERN_POOL:
g_value_set_object (value, priv->extern_pool);
break;
case PROP_EMIT_FRAME_STATS:
g_value_set_boolean (value, priv->emit_frame_stats);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -961,6 +1007,14 @@ gst_nv_encoder_thread_func (GstNvEncoder * self)
gst_nv_enc_task_unlock_bitstream (task);
gst_nv_enc_task_unref (task);
if (priv->emit_frame_stats) {
gst_structure_set (priv->frame_stats,
"frame-idx", G_TYPE_UINT, bitstream.frameIdx,
"frame-avg-qp", G_TYPE_UINT, bitstream.frameAvgQP, NULL);
g_signal_emit (self, gst_nv_encoder_signals[SIGNAL_FRAME_STATS], 0,
priv->frame_stats);
}
priv->last_flow = gst_video_encoder_finish_frame (encoder, frame);
if (priv->last_flow != GST_FLOW_OK) {
GST_INFO_OBJECT (self,