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msdk: h264_enc: Add LookaheadDownsampling support

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This option controls down sampling in look ahead bitrate
control mode. According to spec it is only supported in AVC.

Fixme: Probably HEVC also have support for this in recent
MSDK versions. We could move the enumeration types to common
header usable for multiple codecs.

https://bugzilla.gnome.org/show_bug.cgi?id=791637
This commit is contained in:
Sreerenj Balachandran 2018-02-15 12:19:48 +00:00
parent ae8d956c2c
commit d58c0bd509
2 changed files with 45 additions and 7 deletions
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45
sys/msdk/gstmsdkh264enc.c
View file

@ -46,12 +46,13 @@ enum
PROP_CABAC = GST_MSDKENC_PROP_MAX,
PROP_LOW_POWER,
PROP_FRAME_PACKING,
PROP_RC_LA_DOWNSAMPLING,
};
#define PROP_CABAC_DEFAULT TRUE
#define PROP_LOWPOWER_DEFAULT FALSE
#define PROP_FRAME_PACKING_DEFAULT -1
#define PROP_RC_LA_DOWNSAMPLING_DEFAULT MFX_LOOKAHEAD_DS_UNKNOWN
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
@ -83,6 +84,26 @@ gst_msdkh264enc_frame_packing_get_type (void)
return format_type;
}
static GType
gst_msdkh264enc_rc_lookahead_ds_get_type (void)
{
static GType type = 0;
static const GEnumValue values[] = {
{MFX_LOOKAHEAD_DS_UNKNOWN, "SDK desides what to do", "default"},
{MFX_LOOKAHEAD_DS_OFF, "No downsampling", "off"},
{MFX_LOOKAHEAD_DS_2x, "Down sample 2-times before estimation", "2x"},
{MFX_LOOKAHEAD_DS_4x, "Down sample 4-times before estimation", "4x"},
{0, NULL, NULL}
};
if (!type) {
type =
g_enum_register_static ("GstMsdkH264RCLookAheadDownsampling", values);
}
return type;
}
#define gst_msdkh264enc_parent_class parent_class
G_DEFINE_TYPE (GstMsdkH264Enc, gst_msdkh264enc, GST_TYPE_MSDKENC);
@ -282,6 +303,10 @@ gst_msdkh264enc_configure (GstMsdkEnc * encoder)
gst_msdkenc_add_extra_param (encoder, (mfxExtBuffer *) & thiz->option);
if (encoder->rate_control == MFX_RATECONTROL_LA ||
encoder->rate_control == MFX_RATECONTROL_LA_HRD ||
encoder->rate_control == MFX_RATECONTROL_LA_ICQ)
encoder->option2.LookAheadDS = thiz->lookahead_ds;
return TRUE;
}
@ -397,6 +422,9 @@ gst_msdkh264enc_set_property (GObject * object, guint prop_id,
case PROP_FRAME_PACKING:
thiz->frame_packing = g_value_get_enum (value);
break;
case PROP_RC_LA_DOWNSAMPLING:
thiz->lookahead_ds = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -425,6 +453,9 @@ gst_msdkh264enc_get_property (GObject * object, guint prop_id, GValue * value,
case PROP_FRAME_PACKING:
g_value_set_enum (value, thiz->frame_packing);
break;
case PROP_RC_LA_DOWNSAMPLING:
g_value_set_enum (value, thiz->lookahead_ds);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -470,12 +501,17 @@ gst_msdkh264enc_class_init (GstMsdkH264EncClass * klass)
gst_msdkh264enc_frame_packing_get_type (), PROP_FRAME_PACKING_DEFAULT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_RC_LA_DOWNSAMPLING,
g_param_spec_enum ("rc-lookahead-ds", "Look-ahead Downsampling",
"Down sampling mode in look ahead bitrate control",
gst_msdkh264enc_rc_lookahead_ds_get_type (),
PROP_RC_LA_DOWNSAMPLING_DEFAULT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_set_static_metadata (element_class,
"Intel MSDK H264 encoder",
"Codec/Encoder/Video",
"Intel MSDK H264 encoder", "Codec/Encoder/Video",
"H264 video encoder based on Intel Media SDK",
"Josep Torra <jtorra@oblong.com>");
gst_element_class_add_static_pad_template (element_class, &src_factory);
}
@ -485,4 +521,5 @@ gst_msdkh264enc_init (GstMsdkH264Enc * thiz)
thiz->cabac = PROP_CABAC_DEFAULT;
thiz->lowpower = PROP_LOWPOWER_DEFAULT;
thiz->frame_packing = PROP_FRAME_PACKING_DEFAULT;
thiz->lookahead_ds = PROP_RC_LA_DOWNSAMPLING_DEFAULT;
}

1
sys/msdk/gstmsdkh264enc.h
View file

@ -62,6 +62,7 @@ struct _GstMsdkH264Enc
gboolean cabac;
gboolean lowpower;
gint frame_packing;
guint lookahead_ds;
};
struct _GstMsdkH264EncClass