gstreamer/sys/nvcodec/gstnvh264enc.c

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/* GStreamer NVENC plugin
* Copyright (C) 2015 Centricular Ltd
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstnvh264enc.h"
#include <gst/pbutils/codec-utils.h>
#include <string.h>
typedef struct
{
GstCaps *sink_caps;
GstCaps *src_caps;
gboolean is_default;
} GstNvH264EncClassData;
GST_DEBUG_CATEGORY_STATIC (gst_nv_h264_enc_debug);
#define GST_CAT_DEFAULT gst_nv_h264_enc_debug
static GstElementClass *parent_class = NULL;
enum
{
PROP_0,
PROP_AUD,
PROP_WEIGHTED_PRED,
PROP_VBV_BUFFER_SIZE,
PROP_RC_LOOKAHEAD,
PROP_TEMPORAL_AQ,
PROP_BFRAMES,
PROP_B_ADAPT,
};
#define DEFAULT_AUD TRUE
#define DEFAULT_WEIGHTED_PRED FALSE
#define DEFAULT_VBV_BUFFER_SIZE 0
#define DEFAULT_RC_LOOKAHEAD 0
#define DEFAULT_TEMPORAL_AQ FALSE
#define DEFAULT_BFRAMES 0
#define DEFAULT_B_ADAPT FALSE
static gboolean gst_nv_h264_enc_open (GstVideoEncoder * enc);
static gboolean gst_nv_h264_enc_close (GstVideoEncoder * enc);
static gboolean gst_nv_h264_enc_set_src_caps (GstNvBaseEnc * nvenc,
GstVideoCodecState * state);
static gboolean gst_nv_h264_enc_set_encoder_config (GstNvBaseEnc * nvenc,
GstVideoCodecState * state, NV_ENC_CONFIG * config);
static gboolean gst_nv_h264_enc_set_pic_params (GstNvBaseEnc * nvenc,
GstVideoCodecFrame * frame, NV_ENC_PIC_PARAMS * pic_params);
static void gst_nv_h264_enc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_nv_h264_enc_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_nv_h264_enc_finalize (GObject * obj);
static void
gst_nv_h264_enc_class_init (GstNvH264EncClass * klass, gpointer data)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GstVideoEncoderClass *videoenc_class = GST_VIDEO_ENCODER_CLASS (klass);
GstNvBaseEncClass *nvenc_class = GST_NV_BASE_ENC_CLASS (klass);
GstNvEncDeviceCaps *device_caps = &nvenc_class->device_caps;
GstNvH264EncClassData *cdata = (GstNvH264EncClassData *) data;
gchar *long_name;
parent_class = g_type_class_peek_parent (klass);
gobject_class->set_property = gst_nv_h264_enc_set_property;
gobject_class->get_property = gst_nv_h264_enc_get_property;
gobject_class->finalize = gst_nv_h264_enc_finalize;
videoenc_class->open = GST_DEBUG_FUNCPTR (gst_nv_h264_enc_open);
videoenc_class->close = GST_DEBUG_FUNCPTR (gst_nv_h264_enc_close);
nvenc_class->codec_id = NV_ENC_CODEC_H264_GUID;
nvenc_class->set_encoder_config = gst_nv_h264_enc_set_encoder_config;
nvenc_class->set_src_caps = gst_nv_h264_enc_set_src_caps;
nvenc_class->set_pic_params = gst_nv_h264_enc_set_pic_params;
g_object_class_install_property (gobject_class, PROP_AUD,
g_param_spec_boolean ("aud", "AUD",
"Use AU (Access Unit) delimiter", DEFAULT_AUD,
G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
G_PARAM_STATIC_STRINGS));
if (device_caps->weighted_prediction) {
g_object_class_install_property (gobject_class, PROP_WEIGHTED_PRED,
g_param_spec_boolean ("weighted-pred", "Weighted Pred",
"Weighted Prediction "
"(Exposed only if supported by device)", DEFAULT_WEIGHTED_PRED,
G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
G_PARAM_STATIC_STRINGS));
}
if (device_caps->custom_vbv_bufsize) {
g_object_class_install_property (gobject_class,
PROP_VBV_BUFFER_SIZE,
g_param_spec_uint ("vbv-buffer-size", "VBV Buffer Size",
"VBV(HRD) Buffer Size in kbits (0 = NVENC default) "
"(Exposed only if supported by device)", 0, G_MAXUINT,
DEFAULT_VBV_BUFFER_SIZE,
G_PARAM_READWRITE | GST_PARAM_MUTABLE_READY |
G_PARAM_STATIC_STRINGS));
}
if (device_caps->lookahead) {
g_object_class_install_property (gobject_class, PROP_RC_LOOKAHEAD,
g_param_spec_uint ("rc-lookahead", "Rate Control Lookahead",
"Number of frames for frame type lookahead "
"(Exposed only if supported by device)", 0, 32,
DEFAULT_RC_LOOKAHEAD,
G_PARAM_READWRITE | GST_PARAM_MUTABLE_READY |
G_PARAM_STATIC_STRINGS));
}
if (device_caps->temporal_aq) {
g_object_class_install_property (gobject_class, PROP_TEMPORAL_AQ,
g_param_spec_boolean ("temporal-aq", "Temporal AQ",
"Temporal Adaptive Quantization "
"(Exposed only if supported by device)", DEFAULT_TEMPORAL_AQ,
G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
G_PARAM_STATIC_STRINGS));
}
if (device_caps->bframes > 0) {
g_object_class_install_property (gobject_class, PROP_BFRAMES,
g_param_spec_uint ("bframes", "B-Frames",
"Number of B-frames between I and P "
"(Exposed only if supported by device)", 0, device_caps->bframes,
DEFAULT_BFRAMES,
G_PARAM_READWRITE | GST_PARAM_MUTABLE_READY |
G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_B_ADAPT,
g_param_spec_boolean ("b-adapt", "B Adapt",
"Enable adaptive B-frame insert when lookahead is enabled "
"(Exposed only if supported by device)",
DEFAULT_B_ADAPT,
G_PARAM_READWRITE | GST_PARAM_MUTABLE_READY |
G_PARAM_STATIC_STRINGS));
}
if (cdata->is_default)
long_name = g_strdup ("NVENC H.264 Video Encoder");
else
long_name = g_strdup_printf ("NVENC H.264 Video Encoder with device %d",
nvenc_class->cuda_device_id);
gst_element_class_set_metadata (element_class, long_name,
"Codec/Encoder/Video/Hardware",
"Encode H.264 video streams using NVIDIA's hardware-accelerated NVENC encoder API",
"Tim-Philipp Müller <tim@centricular.com>, "
"Matthew Waters <matthew@centricular.com>, "
"Seungha Yang <seungha.yang@navercorp.com>");
g_free (long_name);
GST_DEBUG_CATEGORY_INIT (gst_nv_h264_enc_debug,
"nvh264enc", 0, "Nvidia H.264 encoder");
gst_element_class_add_pad_template (element_class,
gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
cdata->sink_caps));
gst_element_class_add_pad_template (element_class,
gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
cdata->src_caps));
gst_caps_unref (cdata->sink_caps);
gst_caps_unref (cdata->src_caps);
g_free (cdata);
}
static void
gst_nv_h264_enc_init (GstNvH264Enc * nvenc)
{
GstNvBaseEnc *baseenc = GST_NV_BASE_ENC (nvenc);
nvenc->aud = DEFAULT_AUD;
/* device capability dependent properties */
baseenc->weighted_pred = DEFAULT_WEIGHTED_PRED;
baseenc->vbv_buffersize = DEFAULT_VBV_BUFFER_SIZE;
baseenc->rc_lookahead = DEFAULT_RC_LOOKAHEAD;
baseenc->temporal_aq = DEFAULT_TEMPORAL_AQ;
baseenc->bframes = DEFAULT_BFRAMES;
baseenc->b_adapt = DEFAULT_B_ADAPT;
}
static void
gst_nv_h264_enc_finalize (GObject * obj)
{
G_OBJECT_CLASS (parent_class)->finalize (obj);
}
static gboolean
gst_nv_h264_enc_open (GstVideoEncoder * enc)
{
GstNvBaseEnc *base = GST_NV_BASE_ENC (enc);
if (!GST_VIDEO_ENCODER_CLASS (parent_class)->open (enc))
return FALSE;
/* Check if H.264 is supported */
{
uint32_t i, num = 0;
GUID guids[16];
NvEncGetEncodeGUIDs (base->encoder, guids, G_N_ELEMENTS (guids), &num);
for (i = 0; i < num; ++i) {
if (gst_nvenc_cmp_guid (guids[i], NV_ENC_CODEC_H264_GUID))
break;
}
GST_INFO_OBJECT (enc, "H.264 encoding %ssupported", (i == num) ? "un" : "");
if (i == num) {
gst_nv_h264_enc_close (enc);
return FALSE;
}
}
return TRUE;
}
static gboolean
gst_nv_h264_enc_close (GstVideoEncoder * enc)
{
return GST_VIDEO_ENCODER_CLASS (parent_class)->close (enc);
}
static gboolean
gst_nv_h264_enc_set_profile_and_level (GstNvH264Enc * nvenc, GstCaps * caps)
{
#define N_BYTES_SPS 128
guint8 sps[N_BYTES_SPS];
NV_ENC_SEQUENCE_PARAM_PAYLOAD spp = { 0, };
GstStructure *s;
const gchar *profile;
GstCaps *allowed_caps;
GstStructure *s2;
const gchar *allowed_profile;
NVENCSTATUS nv_ret;
guint32 seq_size;
spp.version = gst_nvenc_get_sequence_param_payload_version ();
spp.inBufferSize = N_BYTES_SPS;
spp.spsId = 0;
spp.ppsId = 0;
spp.spsppsBuffer = &sps;
spp.outSPSPPSPayloadSize = &seq_size;
nv_ret = NvEncGetSequenceParams (GST_NV_BASE_ENC (nvenc)->encoder, &spp);
if (nv_ret != NV_ENC_SUCCESS) {
GST_ELEMENT_ERROR (nvenc, STREAM, ENCODE, ("Encode header failed."),
("NvEncGetSequenceParams return code=%d", nv_ret));
return FALSE;
}
if (seq_size < 8) {
GST_ELEMENT_ERROR (nvenc, STREAM, ENCODE, ("Encode header failed."),
("NvEncGetSequenceParams returned incomplete data"));
return FALSE;
}
/* skip nal header and identifier */
gst_codec_utils_h264_caps_set_level_and_profile (caps, &sps[5], 3);
/* Constrained baseline is a strict subset of baseline. If downstream
* wanted baseline and we produced constrained baseline, we can just
* set the profile to baseline in the caps to make negotiation happy.
* Same goes for baseline as subset of main profile and main as a subset
* of high profile.
*/
s = gst_caps_get_structure (caps, 0);
profile = gst_structure_get_string (s, "profile");
allowed_caps = gst_pad_get_allowed_caps (GST_VIDEO_ENCODER_SRC_PAD (nvenc));
if (allowed_caps == NULL)
goto no_peer;
if (!gst_caps_can_intersect (allowed_caps, caps)) {
allowed_caps = gst_caps_make_writable (allowed_caps);
allowed_caps = gst_caps_truncate (allowed_caps);
s2 = gst_caps_get_structure (allowed_caps, 0);
gst_structure_fixate_field_string (s2, "profile", profile);
allowed_profile = gst_structure_get_string (s2, "profile");
if (!strcmp (allowed_profile, "high")) {
if (!strcmp (profile, "constrained-baseline")
|| !strcmp (profile, "baseline") || !strcmp (profile, "main")) {
gst_structure_set (s, "profile", G_TYPE_STRING, "high", NULL);
GST_INFO_OBJECT (nvenc, "downstream requested high profile, but "
"encoder will now output %s profile (which is a subset), due "
"to how it's been configured", profile);
}
} else if (!strcmp (allowed_profile, "main")) {
if (!strcmp (profile, "constrained-baseline")
|| !strcmp (profile, "baseline")) {
gst_structure_set (s, "profile", G_TYPE_STRING, "main", NULL);
GST_INFO_OBJECT (nvenc, "downstream requested main profile, but "
"encoder will now output %s profile (which is a subset), due "
"to how it's been configured", profile);
}
} else if (!strcmp (allowed_profile, "baseline")) {
if (!strcmp (profile, "constrained-baseline"))
gst_structure_set (s, "profile", G_TYPE_STRING, "baseline", NULL);
}
}
gst_caps_unref (allowed_caps);
no_peer:
return TRUE;
#undef N_BYTES_SPS
}
static gboolean
gst_nv_h264_enc_set_src_caps (GstNvBaseEnc * nvenc, GstVideoCodecState * state)
{
GstNvH264Enc *h264enc = (GstNvH264Enc *) nvenc;
GstVideoCodecState *out_state;
GstStructure *s;
GstCaps *out_caps;
out_caps = gst_caps_new_empty_simple ("video/x-h264");
s = gst_caps_get_structure (out_caps, 0);
/* TODO: add support for avc format as well */
gst_structure_set (s, "stream-format", G_TYPE_STRING, "byte-stream",
"alignment", G_TYPE_STRING, "au", NULL);
if (!gst_nv_h264_enc_set_profile_and_level (h264enc, out_caps)) {
gst_caps_unref (out_caps);
return FALSE;
}
out_state = gst_video_encoder_set_output_state (GST_VIDEO_ENCODER (nvenc),
out_caps, state);
GST_INFO_OBJECT (nvenc, "output caps: %" GST_PTR_FORMAT, out_state->caps);
/* encoder will keep it around for us */
gst_video_codec_state_unref (out_state);
/* TODO: would be nice to also send some tags with the codec name */
return TRUE;
}
static gboolean
gst_nv_h264_enc_set_encoder_config (GstNvBaseEnc * nvenc,
GstVideoCodecState * state, NV_ENC_CONFIG * config)
{
GstNvH264Enc *h264enc = (GstNvH264Enc *) nvenc;
GstCaps *allowed_caps, *template_caps;
GUID selected_profile = NV_ENC_CODEC_PROFILE_AUTOSELECT_GUID;
int level_idc = NV_ENC_LEVEL_AUTOSELECT;
GstVideoInfo *info = &state->info;
NV_ENC_CONFIG_H264 *h264_config = &config->encodeCodecConfig.h264Config;
NV_ENC_CONFIG_H264_VUI_PARAMETERS *vui = &h264_config->h264VUIParameters;
template_caps =
gst_pad_get_pad_template_caps (GST_VIDEO_ENCODER_SRC_PAD (h264enc));
allowed_caps = gst_pad_get_allowed_caps (GST_VIDEO_ENCODER_SRC_PAD (h264enc));
if (template_caps == allowed_caps) {
GST_INFO_OBJECT (h264enc, "downstream has ANY caps");
} else if (allowed_caps) {
GstStructure *s;
const gchar *profile;
const gchar *level;
if (gst_caps_is_empty (allowed_caps)) {
gst_caps_unref (allowed_caps);
gst_caps_unref (template_caps);
return FALSE;
}
allowed_caps = gst_caps_make_writable (allowed_caps);
allowed_caps = gst_caps_fixate (allowed_caps);
s = gst_caps_get_structure (allowed_caps, 0);
profile = gst_structure_get_string (s, "profile");
if (profile) {
if (!strcmp (profile, "baseline")) {
selected_profile = NV_ENC_H264_PROFILE_BASELINE_GUID;
} else if (g_str_has_prefix (profile, "high-4:4:4")) {
selected_profile = NV_ENC_H264_PROFILE_HIGH_444_GUID;
} else if (g_str_has_prefix (profile, "high-10")) {
g_assert_not_reached ();
} else if (g_str_has_prefix (profile, "high-4:2:2")) {
g_assert_not_reached ();
} else if (g_str_has_prefix (profile, "high")) {
selected_profile = NV_ENC_H264_PROFILE_HIGH_GUID;
} else if (g_str_has_prefix (profile, "main")) {
selected_profile = NV_ENC_H264_PROFILE_MAIN_GUID;
} else {
g_assert_not_reached ();
}
}
level = gst_structure_get_string (s, "level");
if (level)
/* matches values stored in NV_ENC_LEVEL */
level_idc = gst_codec_utils_h264_get_level_idc (level);
gst_caps_unref (allowed_caps);
}
gst_caps_unref (template_caps);
/* override some defaults */
GST_LOG_OBJECT (h264enc, "setting parameters");
config->profileGUID = selected_profile;
h264_config->level = level_idc;
h264_config->chromaFormatIDC = 1;
if (GST_VIDEO_INFO_FORMAT (info) == GST_VIDEO_FORMAT_Y444 ||
GST_VIDEO_INFO_FORMAT (info) == GST_VIDEO_FORMAT_VUYA) {
GST_DEBUG_OBJECT (h264enc, "have Y444 input, setting config accordingly");
config->profileGUID = NV_ENC_H264_PROFILE_HIGH_444_GUID;
h264_config->chromaFormatIDC = 3;
}
h264_config->idrPeriod = config->gopLength;
h264_config->outputAUD = h264enc->aud;
vui->videoSignalTypePresentFlag = 1;
/* NOTE: vui::video_format represents the video format before
* being encoded such as PAL, NTSC, SECAM, and MAC. That's not much informal
* and can be inferred with resolution and framerate by any application.
*/
/* Unspecified video format (5) */
vui->videoFormat = 5;
if (info->colorimetry.range == GST_VIDEO_COLOR_RANGE_0_255) {
vui->videoFullRangeFlag = 1;
} else {
vui->videoFullRangeFlag = 0;
}
vui->colourDescriptionPresentFlag = 1;
vui->colourMatrix = gst_video_color_matrix_to_iso (info->colorimetry.matrix);
vui->colourPrimaries =
gst_video_color_primaries_to_iso (info->colorimetry.primaries);
vui->transferCharacteristics =
gst_video_color_transfer_to_iso (info->colorimetry.transfer);
return TRUE;
}
static gboolean
gst_nv_h264_enc_set_pic_params (GstNvBaseEnc * enc, GstVideoCodecFrame * frame,
NV_ENC_PIC_PARAMS * pic_params)
{
/* encode whole picture in one single slice */
pic_params->codecPicParams.h264PicParams.sliceMode = 0;
pic_params->codecPicParams.h264PicParams.sliceModeData = 0;
return TRUE;
}
static void
gst_nv_h264_enc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstNvH264Enc *self = (GstNvH264Enc *) object;
GstNvBaseEnc *nvenc = GST_NV_BASE_ENC (object);
GstNvBaseEncClass *klass = GST_NV_BASE_ENC_GET_CLASS (object);
GstNvEncDeviceCaps *device_caps = &klass->device_caps;
gboolean reconfig = FALSE;
switch (prop_id) {
case PROP_AUD:
{
gboolean aud;
aud = g_value_get_boolean (value);
if (aud != self->aud) {
self->aud = aud;
reconfig = TRUE;
}
break;
}
case PROP_WEIGHTED_PRED:
if (!device_caps->weighted_prediction) {
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
} else {
nvenc->weighted_pred = g_value_get_boolean (value);
reconfig = TRUE;
}
break;
case PROP_VBV_BUFFER_SIZE:
if (!device_caps->custom_vbv_bufsize) {
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
} else {
nvenc->vbv_buffersize = g_value_get_uint (value);
reconfig = TRUE;
}
break;
case PROP_RC_LOOKAHEAD:
if (!device_caps->lookahead) {
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
} else {
nvenc->rc_lookahead = g_value_get_uint (value);
reconfig = TRUE;
}
break;
case PROP_TEMPORAL_AQ:
if (!device_caps->temporal_aq) {
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
} else {
nvenc->temporal_aq = g_value_get_boolean (value);
reconfig = TRUE;
}
break;
case PROP_BFRAMES:
if (!device_caps->bframes) {
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
} else {
nvenc->bframes = g_value_get_uint (value);
reconfig = TRUE;
}
break;
case PROP_B_ADAPT:
if (!device_caps->bframes) {
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
} else {
nvenc->b_adapt = g_value_get_boolean (value);
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
if (reconfig)
gst_nv_base_enc_schedule_reconfig (GST_NV_BASE_ENC (self));
}
static void
gst_nv_h264_enc_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstNvH264Enc *self = (GstNvH264Enc *) object;
GstNvBaseEnc *nvenc = GST_NV_BASE_ENC (object);
GstNvBaseEncClass *klass = GST_NV_BASE_ENC_GET_CLASS (object);
GstNvEncDeviceCaps *device_caps = &klass->device_caps;
switch (prop_id) {
case PROP_AUD:
g_value_set_boolean (value, self->aud);
break;
case PROP_WEIGHTED_PRED:
if (!device_caps->weighted_prediction) {
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
} else {
g_value_set_boolean (value, nvenc->weighted_pred);
}
break;
case PROP_VBV_BUFFER_SIZE:
if (!device_caps->custom_vbv_bufsize) {
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
} else {
g_value_set_uint (value, nvenc->vbv_buffersize);
}
break;
case PROP_RC_LOOKAHEAD:
if (!device_caps->lookahead) {
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
} else {
g_value_set_uint (value, nvenc->rc_lookahead);
}
break;
case PROP_TEMPORAL_AQ:
if (!device_caps->temporal_aq) {
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
} else {
g_value_set_boolean (value, nvenc->temporal_aq);
}
break;
case PROP_BFRAMES:
if (!device_caps->bframes) {
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
} else {
g_value_set_uint (value, nvenc->bframes);
}
break;
case PROP_B_ADAPT:
if (!device_caps->bframes) {
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
} else {
g_value_set_boolean (value, nvenc->b_adapt);
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
void
gst_nv_h264_enc_register (GstPlugin * plugin, guint device_id, guint rank,
GstCaps * sink_caps, GstCaps * src_caps, GstNvEncDeviceCaps * device_caps)
{
GType parent_type;
GType type;
gchar *type_name;
gchar *feature_name;
GstNvH264EncClassData *cdata;
gboolean is_default = TRUE;
GTypeInfo type_info = {
sizeof (GstNvH264EncClass),
NULL,
NULL,
(GClassInitFunc) gst_nv_h264_enc_class_init,
NULL,
NULL,
sizeof (GstNvH264Enc),
0,
(GInstanceInitFunc) gst_nv_h264_enc_init,
};
parent_type = gst_nv_base_enc_register ("H264", device_id, device_caps);
cdata = g_new0 (GstNvH264EncClassData, 1);
cdata->sink_caps = gst_caps_ref (sink_caps);
cdata->src_caps = gst_caps_ref (src_caps);
type_info.class_data = cdata;
type_name = g_strdup ("GstNvH264Enc");
feature_name = g_strdup ("nvh264enc");
if (g_type_from_name (type_name) != 0) {
g_free (type_name);
g_free (feature_name);
type_name = g_strdup_printf ("GstNvH264Device%dEnc", device_id);
feature_name = g_strdup_printf ("nvh264device%denc", device_id);
is_default = FALSE;
}
cdata->is_default = is_default;
type = g_type_register_static (parent_type, type_name, &type_info, 0);
/* make lower rank than default device */
if (rank > 0 && !is_default)
rank--;
if (!gst_element_register (plugin, feature_name, rank, type))
GST_WARNING ("Failed to register plugin '%s'", type_name);
g_free (type_name);
g_free (feature_name);
}