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nvenc: Early terminate handle_frame if the last flow was not GST_FLOW_OK

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If the last flow was not GST_FLOW_OK, the encoding thread is not running
and there is nothing to pop from GAsyncQueue (this causes deadlock).

To prevent deadlock, just return the handle_frame without further encoding
process if the last flow was not GST_FLOW_OK. Note that the last flow
will be cleared per FLUSH_STOP and STREAM_START event.
This commit is contained in:
Seungha Yang 2019-08-30 21:35:44 +09:00 committed by Matthew Waters
parent 68a51abdcd
commit 52dfbbe5da
1 changed files with 34 additions and 4 deletions
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38
sys/nvcodec/gstnvbaseenc.c
View file

@ -34,10 +34,6 @@
#include <gst/gl/gl.h>
#endif
/* TODO:
* - reset last_flow on FLUSH_STOP (seeking)
*/
/* This currently supports both 5.x and 6.x versions of the NvEncodeAPI.h
* header which are mostly API compatible. */
@ -234,6 +230,8 @@ static void gst_nv_base_enc_set_context (GstElement * element,
GstContext * context);
static gboolean gst_nv_base_enc_sink_query (GstVideoEncoder * enc,
GstQuery * query);
static gboolean gst_nv_base_enc_sink_event (GstVideoEncoder * enc,
GstEvent * event);
static gboolean gst_nv_base_enc_set_format (GstVideoEncoder * enc,
GstVideoCodecState * state);
static GstFlowReturn gst_nv_base_enc_handle_frame (GstVideoEncoder * enc,
@ -276,6 +274,7 @@ gst_nv_base_enc_class_init (GstNvBaseEncClass * klass)
GST_DEBUG_FUNCPTR (gst_nv_base_enc_handle_frame);
videoenc_class->finish = GST_DEBUG_FUNCPTR (gst_nv_base_enc_finish);
videoenc_class->sink_query = GST_DEBUG_FUNCPTR (gst_nv_base_enc_sink_query);
videoenc_class->sink_event = GST_DEBUG_FUNCPTR (gst_nv_base_enc_sink_event);
g_object_class_install_property (gobject_class, PROP_DEVICE_ID,
g_param_spec_uint ("cuda-device-id",
@ -560,6 +559,26 @@ gst_nv_base_enc_sink_query (GstVideoEncoder * enc, GstQuery * query)
return GST_VIDEO_ENCODER_CLASS (parent_class)->sink_query (enc, query);
}
static gboolean
gst_nv_base_enc_sink_event (GstVideoEncoder * enc, GstEvent * event)
{
GstNvBaseEnc *nvenc = GST_NV_BASE_ENC (enc);
gboolean ret;
ret = GST_VIDEO_ENCODER_CLASS (parent_class)->sink_event (enc, event);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_STREAM_START:
case GST_EVENT_FLUSH_STOP:
nvenc->last_flow = GST_FLOW_OK;
break;
default:
break;
}
return ret;
}
static gboolean
gst_nv_base_enc_start (GstVideoEncoder * enc)
{
@ -2240,6 +2259,17 @@ gst_nv_base_enc_handle_frame (GstVideoEncoder * enc, GstVideoCodecFrame * frame)
g_assert (nvenc->encoder != NULL);
/* check last flow and if it's not OK, just return the last flow,
* non-OK flow means that encoding thread was terminated */
flow = g_atomic_int_get (&nvenc->last_flow);
if (flow != GST_FLOW_OK) {
GST_DEBUG_OBJECT (nvenc, "last flow was %s", gst_flow_get_name (flow));
/* just drop this frame */
gst_video_encoder_finish_frame (enc, frame);
return flow;
}
if (g_atomic_int_compare_and_exchange (&nvenc->reconfig, TRUE, FALSE)) {
if (!gst_nv_base_enc_set_format (enc, nvenc->input_state)) {
flow = GST_FLOW_NOT_NEGOTIATED;