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nvenc: Ensure drain all frames on finish

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To drain all queued encoding items, encoder should gracefully
wait the encoding thread without stealing queued items.
Otherwise, some input frames can be dropped.
This commit is contained in:
Seungha Yang 2018-12-13 22:03:36 +09:00
parent 231c76b0ce
commit 74848770a5
1 changed files with 20 additions and 18 deletions
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38
sys/nvenc/gstnvbaseenc.c
View file

@ -210,7 +210,8 @@ static void gst_nv_base_enc_get_property (GObject * object, guint prop_id,
static void gst_nv_base_enc_finalize (GObject * obj);
static GstCaps *gst_nv_base_enc_getcaps (GstVideoEncoder * enc,
GstCaps * filter);
static gboolean gst_nv_base_enc_stop_bitstream_thread (GstNvBaseEnc * nvenc);
static gboolean gst_nv_base_enc_stop_bitstream_thread (GstNvBaseEnc * nvenc,
gboolean force);
static void
gst_nv_base_enc_class_init (GstNvBaseEncClass * klass)
@ -508,7 +509,7 @@ gst_nv_base_enc_stop (GstVideoEncoder * enc)
{
GstNvBaseEnc *nvenc = GST_NV_BASE_ENC (enc);
gst_nv_base_enc_stop_bitstream_thread (nvenc);
gst_nv_base_enc_stop_bitstream_thread (nvenc, TRUE);
gst_nv_base_enc_free_buffers (nvenc);
@ -883,24 +884,27 @@ gst_nv_base_enc_start_bitstream_thread (GstNvBaseEnc * nvenc)
}
static gboolean
gst_nv_base_enc_stop_bitstream_thread (GstNvBaseEnc * nvenc)
gst_nv_base_enc_stop_bitstream_thread (GstNvBaseEnc * nvenc, gboolean force)
{
gpointer out_buf;
if (nvenc->bitstream_thread == NULL)
return TRUE;
/* FIXME */
GST_FIXME_OBJECT (nvenc, "stop bitstream reading thread properly");
g_async_queue_lock (nvenc->bitstream_queue);
g_async_queue_lock (nvenc->bitstream_pool);
while ((out_buf = g_async_queue_try_pop_unlocked (nvenc->bitstream_queue))) {
GST_INFO_OBJECT (nvenc, "stole bitstream buffer %p from queue", out_buf);
g_async_queue_push_unlocked (nvenc->bitstream_pool, out_buf);
if (force) {
g_async_queue_lock (nvenc->bitstream_queue);
g_async_queue_lock (nvenc->bitstream_pool);
while ((out_buf = g_async_queue_try_pop_unlocked (nvenc->bitstream_queue))) {
GST_INFO_OBJECT (nvenc, "stole bitstream buffer %p from queue", out_buf);
g_async_queue_push_unlocked (nvenc->bitstream_pool, out_buf);
}
g_async_queue_push_unlocked (nvenc->bitstream_queue, SHUTDOWN_COOKIE);
g_async_queue_unlock (nvenc->bitstream_pool);
g_async_queue_unlock (nvenc->bitstream_queue);
} else {
/* wait for encoder to drain the remaining buffers */
g_async_queue_push (nvenc->bitstream_queue, SHUTDOWN_COOKIE);
}
g_async_queue_push_unlocked (nvenc->bitstream_queue, SHUTDOWN_COOKIE);
g_async_queue_unlock (nvenc->bitstream_pool);
g_async_queue_unlock (nvenc->bitstream_queue);
/* temporary unlock, so other thread can find and push frame */
GST_VIDEO_ENCODER_STREAM_UNLOCK (nvenc);
@ -1902,12 +1906,10 @@ gst_nv_base_enc_finish (GstVideoEncoder * enc)
{
GstNvBaseEnc *nvenc = GST_NV_BASE_ENC (enc);
GST_FIXME_OBJECT (enc, "implement finish");
if (!gst_nv_base_enc_drain_encoder (nvenc))
return GST_FLOW_ERROR;
gst_nv_base_enc_drain_encoder (nvenc);
/* wait for encoder to output the remaining buffers */
gst_nv_base_enc_stop_bitstream_thread (nvenc);
gst_nv_base_enc_stop_bitstream_thread (nvenc, FALSE);
return GST_FLOW_OK;
}