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nvenc: Add support for dynamic bitrate/preset reconfiguration

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Useful for dynamically updating bitrate in live scenarios.

https://bugzilla.gnome.org/show_bug.cgi?id=781410
This commit is contained in:
Ole André Vadla Ravnås 2017-04-17 13:58:53 +02:00 committed by Tim-Philipp Müller
parent bc92b10164
commit 59365e3d7b
2 changed files with 19 additions and 0 deletions
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18
sys/nvenc/gstnvbaseenc.c
View file

@ -1054,6 +1054,8 @@ gst_nv_base_enc_set_format (GstVideoEncoder * enc, GstVideoCodecState * state)
NV_ENC_PRESET_CONFIG preset_config = { 0, };
NVENCSTATUS nv_ret;
g_atomic_int_set (&nvenc->reconfig, FALSE);
if (old_state) {
reconfigure_params.version = NV_ENC_RECONFIGURE_PARAMS_VER;
params = &reconfigure_params.reInitEncodeParams;
@ -1633,6 +1635,10 @@ gst_nv_base_enc_handle_frame (GstVideoEncoder * enc, GstVideoCodecFrame * frame)
g_assert (nvenc->encoder != NULL);
if (g_atomic_int_compare_and_exchange (&nvenc->reconfig, TRUE, FALSE)) {
if (!gst_nv_base_enc_set_format (enc, nvenc->input_state))
return GST_FLOW_ERROR;
}
#if HAVE_NVENC_GST_GL
if (nvenc->gl_input)
in_map_flags |= GST_MAP_GL;
@ -1892,6 +1898,12 @@ gst_nv_base_enc_flush (GstVideoEncoder * enc)
}
#endif
static void
gst_nv_base_enc_schedule_reconfig (GstNvBaseEnc * nvenc)
{
g_atomic_int_set (&nvenc->reconfig, TRUE);
}
static void
gst_nv_base_enc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
@ -1905,21 +1917,27 @@ gst_nv_base_enc_set_property (GObject * object, guint prop_id,
case PROP_PRESET:
nvenc->preset_enum = g_value_get_enum (value);
nvenc->selected_preset = _nv_preset_to_guid (nvenc->preset_enum);
gst_nv_base_enc_schedule_reconfig (nvenc);
break;
case PROP_RC_MODE:
nvenc->rate_control_mode = g_value_get_enum (value);
gst_nv_base_enc_schedule_reconfig (nvenc);
break;
case PROP_QP_MIN:
nvenc->qp_min = g_value_get_int (value);
gst_nv_base_enc_schedule_reconfig (nvenc);
break;
case PROP_QP_MAX:
nvenc->qp_max = g_value_get_int (value);
gst_nv_base_enc_schedule_reconfig (nvenc);
break;
case PROP_QP_CONST:
nvenc->qp_const = g_value_get_int (value);
gst_nv_base_enc_schedule_reconfig (nvenc);
break;
case PROP_BITRATE:
nvenc->bitrate = g_value_get_uint (value);
gst_nv_base_enc_schedule_reconfig (nvenc);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

1
sys/nvenc/gstnvbaseenc.h
View file

@ -77,6 +77,7 @@ typedef struct {
GValue * input_formats; /* OBJECT LOCK */
GstVideoCodecState *input_state;
volatile gint reconfig; /* ATOMIC */
gboolean gl_input;
/* allocated buffers */