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nvenc: add "gop-size" property

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This also changes the default gop size from 30 to 75 frames.

https://bugzilla.gnome.org/show_bug.cgi?id=781410
This commit is contained in:
Tim-Philipp Müller 2017-04-16 16:08:27 +02:00
parent bea0ea66be
commit 07c8417799
3 changed files with 26 additions and 0 deletions
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23
sys/nvenc/gstnvbaseenc.c
View file

@ -166,6 +166,7 @@ enum
PROP_QP_MIN,
PROP_QP_MAX,
PROP_QP_CONST,
PROP_GOP_SIZE,
};
#define DEFAULT_PRESET GST_NV_PRESET_DEFAULT
@ -174,6 +175,7 @@ enum
#define DEFAULT_QP_MIN -1
#define DEFAULT_QP_MAX -1
#define DEFAULT_QP_CONST -1
#define DEFAULT_GOP_SIZE 75
/* This lock is needed to prevent the situation where multiple encoders are
* initialised at the same time which appears to cause excessive CPU usage over
@ -284,6 +286,12 @@ gst_nv_base_enc_class_init (GstNvBaseEncClass * klass)
DEFAULT_QP_CONST,
G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_GOP_SIZE,
g_param_spec_int ("gop-size", "GOP size",
"Number of frames between intra frames (-1 = infinite)",
-1, G_MAXINT, DEFAULT_GOP_SIZE,
(GParamFlags) (G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
G_PARAM_STATIC_STRINGS)));
g_object_class_install_property (gobject_class, PROP_BITRATE,
g_param_spec_uint ("bitrate", "Bitrate",
"Bitrate in kbit/sec (0 = from NVENC preset)", 0, 2000 * 1024,
@ -661,6 +669,7 @@ gst_nv_base_enc_init (GstNvBaseEnc * nvenc)
nvenc->qp_max = DEFAULT_QP_MAX;
nvenc->qp_const = DEFAULT_QP_CONST;
nvenc->bitrate = DEFAULT_BITRATE;
nvenc->gop_size = DEFAULT_GOP_SIZE;
GST_VIDEO_ENCODER_STREAM_LOCK (encoder);
GST_VIDEO_ENCODER_STREAM_UNLOCK (encoder);
@ -1193,6 +1202,13 @@ gst_nv_base_enc_set_format (GstVideoEncoder * enc, GstVideoCodecState * state)
}
}
if (nvenc->gop_size < 0) {
params->encodeConfig->gopLength = NVENC_INFINITE_GOPLENGTH;
params->encodeConfig->frameIntervalP = 1;
} else if (nvenc->gop_size > 0) {
params->encodeConfig->gopLength = nvenc->gop_size;
}
g_assert (nvenc_class->set_encoder_config);
if (!nvenc_class->set_encoder_config (nvenc, state, params->encodeConfig)) {
GST_ERROR_OBJECT (enc, "Subclass failed to set encoder configuration");
@ -1945,6 +1961,10 @@ gst_nv_base_enc_set_property (GObject * object, guint prop_id,
nvenc->bitrate = g_value_get_uint (value);
gst_nv_base_enc_schedule_reconfig (nvenc);
break;
case PROP_GOP_SIZE:
nvenc->gop_size = g_value_get_int (value);
gst_nv_base_enc_schedule_reconfig (nvenc);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -1979,6 +1999,9 @@ gst_nv_base_enc_get_property (GObject * object, guint prop_id, GValue * value,
case PROP_BITRATE:
g_value_set_uint (value, nvenc->bitrate);
break;
case PROP_GOP_SIZE:
g_value_set_int (value, nvenc->gop_size);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;

1
sys/nvenc/gstnvbaseenc.h
View file

@ -69,6 +69,7 @@ typedef struct {
gint qp_max;
gint qp_const;
guint bitrate;
gint gop_size;
CUcontext cuda_ctx;
void * encoder;

2
sys/nvenc/gstnvh264enc.c
View file

@ -479,6 +479,8 @@ gst_nv_h264_enc_set_encoder_config (GstNvBaseEnc * nvenc,
config->encodeCodecConfig.h264Config.chromaFormatIDC = 3;
}
config->encodeCodecConfig.h264Config.idrPeriod = config->gopLength;
/* FIXME: make property */
config->encodeCodecConfig.h264Config.outputAUD = 1;