/* Define the maximum IDR period */
#define MAX_IDR_PERIOD 512
+/* Default CPB length (in milliseconds) */
+#define DEFAULT_CPB_LENGTH 1500
+
+/* Scale factor for bitrate (HRD bit_rate_scale: min = 6) */
+#define SX_BITRATE 6
+
+/* Scale factor for CPB size (HRD cpb_size_scale: min = 4) */
+#define SX_CPB_SIZE 4
+
/* Define default rate control mode ("constant-qp") */
#define DEFAULT_RATECONTROL GST_VAAPI_RATECONTROL_CQP
/* Supported set of VA rate controls, within this implementation */
#define SUPPORTED_RATECONTROLS \
- (GST_VAAPI_RATECONTROL_MASK (CQP))
+ (GST_VAAPI_RATECONTROL_MASK (CQP)) | \
+ GST_VAAPI_RATECONTROL_MASK (CBR)
/* Supported set of tuning options, within this implementation */
#define SUPPORTED_TUNE_OPTIONS \
GstBuffer *pps_data;
guint bitrate_bits; // bitrate (bits)
+ guint cpb_length; // length of CPB buffer (ms)
+ guint cpb_length_bits; // length of CPB buffer (bits)
/* Crop rectangle */
guint conformance_window_flag:1;
static gboolean
bs_write_sps_data (GstBitWriter * bs, GstVaapiEncoderH265 * encoder,
GstVaapiEncPicture * picture,
- const VAEncSequenceParameterBufferHEVC * seq_param, GstVaapiProfile profile)
+ const VAEncSequenceParameterBufferHEVC * seq_param, GstVaapiProfile profile,
+ const VAEncMiscParameterHRD * hrd_params)
{
guint32 video_parameter_set_id = 0;
guint32 max_sub_layers_minus1 = 0;
guint32 num_short_term_ref_pic_sets = 0;
guint32 long_term_ref_pics_present_flag = 0;
guint32 sps_extension_flag = 0;
+ guint32 nal_hrd_parameters_present_flag = 0;
+ guint maxNumSubLayers = 1, i;
/* video_parameter_set_id */
WRITE_UINT32 (bs, video_parameter_set_id, 4);
/* vui_hrd_parameters_present_flag */
vui_hrd_parameters_present_flag = seq_param->bits_per_second > 0;
- vui_hrd_parameters_present_flag = FALSE; /* XXX: disabled for now */
WRITE_UINT32 (bs, vui_hrd_parameters_present_flag, 1);
+
+ if (vui_hrd_parameters_present_flag) {
+ nal_hrd_parameters_present_flag = 1;
+ /* nal_hrd_parameters_present_flag */
+ WRITE_UINT32 (bs, nal_hrd_parameters_present_flag, 1);
+ /* vcl_hrd_parameters_present_flag */
+ WRITE_UINT32 (bs, 0, 1);
+
+ if (nal_hrd_parameters_present_flag) {
+ /* sub_pic_hrd_params_present_flag */
+ WRITE_UINT32 (bs, 0, 1);
+ /* bit_rate_scale */
+ WRITE_UINT32 (bs, SX_BITRATE - 6, 4);
+ /* cpb_size_scale */
+ WRITE_UINT32 (bs, SX_CPB_SIZE - 4, 4);
+ /* initial_cpb_removal_delay_length_minus1 */
+ WRITE_UINT32 (bs, 23, 5);
+ /* au_cpb_removal_delay_length_minus1 */
+ WRITE_UINT32 (bs, 23, 5);
+ /* dpb_output_delay_length_minus1 */
+ WRITE_UINT32 (bs, 23, 5);
+
+ for (i = 0; i < maxNumSubLayers; i++) {
+ /* fixed_pic_rate_general_flag */
+ WRITE_UINT32 (bs, 0, 1);
+ /* fixed_pic_rate_within_cvs_flag */
+ WRITE_UINT32 (bs, 0, 1);
+ /* low_delay_hrd_flag */
+ WRITE_UINT32 (bs, 1, 1);
+ /* bit_rate_value_minus1 */
+ WRITE_UE (bs, (seq_param->bits_per_second >> SX_BITRATE) - 1);
+ /* cpb_size_value_minus1 */
+ WRITE_UE (bs, (hrd_params->buffer_size >> SX_CPB_SIZE) - 1);
+ /* cbr_flag */
+ WRITE_UINT32 (bs, 1, 1);
+ }
+ }
+ }
}
/* bitstream_restriction_flag */
WRITE_UINT32 (bs, seq_param->vui_fields.bits.bitstream_restriction_flag, 1);
static gboolean
bs_write_sps (GstBitWriter * bs, GstVaapiEncoderH265 * encoder,
GstVaapiEncPicture * picture,
- const VAEncSequenceParameterBufferHEVC * seq_param, GstVaapiProfile profile)
+ const VAEncSequenceParameterBufferHEVC * seq_param, GstVaapiProfile profile,
+ const VAEncMiscParameterHRD * hrd_params)
{
- if (!bs_write_sps_data (bs, encoder, picture, seq_param, profile))
+ if (!bs_write_sps_data (bs, encoder, picture, seq_param, profile, hrd_params))
return FALSE;
/* rbsp_trailing_bits */
(slice_param->slice_fields.bits.slice_sao_luma_flag
|| slice_param->slice_fields.bits.slice_sao_chroma_flag
|| !slice_deblocking_filter_disabled_flag))
- WRITE_UINT32 (bs, slice_param->slice_fields.bits.
+ WRITE_UINT32 (bs,
+ slice_param->slice_fields.bits.
slice_loop_filter_across_slices_enabled_flag, 1);
}
set_i_frame (picture, encoder);
}
+/* Fills in VA HRD parameters */
+static void
+fill_hrd_params (GstVaapiEncoderH265 * encoder, VAEncMiscParameterHRD * hrd)
+{
+ if (encoder->bitrate_bits > 0) {
+ hrd->buffer_size = encoder->cpb_length_bits;
+ hrd->initial_buffer_fullness = hrd->buffer_size / 2;
+ } else {
+ hrd->buffer_size = 0;
+ hrd->initial_buffer_fullness = 0;
+ }
+}
+
/* Adds the supplied video parameter set header (VPS) to the list of packed
headers to pass down as-is to the encoder */
static gboolean
const VAEncSequenceParameterBufferHEVC *const seq_param = sequence->param;
GstVaapiProfile profile = encoder->profile;
+ VAEncMiscParameterHRD hrd_params;
guint32 data_bit_size;
guint8 *data;
+ fill_hrd_params (encoder, &hrd_params);
+
gst_bit_writer_init (&bs, 128 * 8);
WRITE_UINT32 (&bs, 0x00000001, 32); /* start code */
bs_write_nal_header (&bs, GST_H265_NAL_SPS);
- bs_write_sps (&bs, encoder, picture, seq_param, profile);
+ bs_write_sps (&bs, encoder, picture, seq_param, profile, &hrd_params);
g_assert (GST_BIT_WRITER_BIT_SIZE (&bs) % 8 == 0);
data_bit_size = GST_BIT_WRITER_BIT_SIZE (&bs);
}
}
+static gboolean
+ensure_misc_params (GstVaapiEncoderH265 * encoder, GstVaapiEncPicture * picture)
+{
+ GstVaapiEncMiscParam *misc = NULL;
+
+ /* HRD params for rate control */
+ if (GST_VAAPI_ENCODER_RATE_CONTROL (encoder) == GST_VAAPI_RATECONTROL_CBR) {
+ misc = GST_VAAPI_ENC_MISC_PARAM_NEW (HRD, encoder);
+ g_assert (misc);
+ if (!misc)
+ return FALSE;
+ fill_hrd_params (encoder, misc->data);
+ gst_vaapi_enc_picture_add_misc_param (picture, misc);
+ gst_vaapi_codec_object_replace (&misc, NULL);
+ }
+
+ return TRUE;
+}
+
/* Generates and submits PPS header accordingly into the bitstream */
static gboolean
ensure_picture (GstVaapiEncoderH265 * encoder, GstVaapiEncPicture * picture,
return TRUE;
}
+
/* Generates slice headers */
static gboolean
ensure_slices (GstVaapiEncoderH265 * encoder, GstVaapiEncPicture * picture)
return TRUE;
}
+/* Normalizes bitrate (and CPB size) for HRD conformance */
+static void
+ensure_bitrate_hrd (GstVaapiEncoderH265 * encoder)
+{
+ GstVaapiEncoder *const base_encoder = GST_VAAPI_ENCODER_CAST (encoder);
+ guint bitrate, cpb_size;
+
+ if (!base_encoder->bitrate) {
+ encoder->bitrate_bits = 0;
+ return;
+ }
+
+ /* Round down bitrate. This is a hard limit mandated by the user */
+ g_assert (SX_BITRATE >= 6);
+ bitrate = (base_encoder->bitrate * 1000) & ~((1U << SX_BITRATE) - 1);
+ if (bitrate != encoder->bitrate_bits) {
+ GST_DEBUG ("HRD bitrate: %u bits/sec", bitrate);
+ encoder->bitrate_bits = bitrate;
+ encoder->config_changed = TRUE;
+ }
+
+ /* Round up CPB size. This is an HRD compliance detail */
+ g_assert (SX_CPB_SIZE >= 4);
+ cpb_size = gst_util_uint64_scale (bitrate, encoder->cpb_length, 1000) &
+ ~((1U << SX_CPB_SIZE) - 1);
+ if (cpb_size != encoder->cpb_length_bits) {
+ GST_DEBUG ("HRD CPB size: %u bits", cpb_size);
+ encoder->cpb_length_bits = cpb_size;
+ encoder->config_changed = TRUE;
+ }
+}
+
/* Estimates a good enough bitrate if none was supplied */
static void
ensure_bitrate (GstVaapiEncoderH265 * encoder)
switch (GST_VAAPI_ENCODER_RATE_CONTROL (encoder)) {
case GST_VAAPI_RATECONTROL_CBR:
- case GST_VAAPI_RATECONTROL_VBR:
- case GST_VAAPI_RATECONTROL_VBR_CONSTRAINED:
if (!base_encoder->bitrate) {
/* Fixme: Provide better estimation */
/* Using a 1/6 compression ratio */
base_encoder->bitrate = 0;
break;
}
+ ensure_bitrate_hrd (encoder);
}
/* Constructs profile, tier and level information based on user-defined limits */
if (!ensure_tier (encoder))
return GST_VAAPI_ENCODER_STATUS_ERROR_OPERATION_FAILED;
+ /* Ensure bitrate if not set already and derive the right level to use */
+ ensure_bitrate (encoder);
+
if (!ensure_level (encoder))
- /* Ensure bitrate if not set already and derive the right level to use */
- ensure_bitrate (encoder);
- if (!ensure_level (encoder))
- return GST_VAAPI_ENCODER_STATUS_ERROR_OPERATION_FAILED;
+ return GST_VAAPI_ENCODER_STATUS_ERROR_OPERATION_FAILED;
if (encoder->profile != profile || encoder->level != level
|| encoder->tier != tier) {
if (!ensure_sequence (encoder, picture))
goto error;
+ if (!ensure_misc_params (encoder, picture))
+ goto error;
if (!ensure_picture (encoder, picture, codedbuf, reconstruct))
goto error;
if (!ensure_slices (encoder, picture))
case GST_VAAPI_ENCODER_H265_PROP_NUM_SLICES:
encoder->num_slices = g_value_get_uint (value);
break;
+ case GST_VAAPI_ENCODER_H265_PROP_CPB_LENGTH:
+ encoder->cpb_length = g_value_get_uint (value);
+ break;
default:
return GST_VAAPI_ENCODER_STATUS_ERROR_INVALID_PARAMETER;
}
"Number of Slices",
"Number of slices per frame",
1, 200, 1, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+ /**
+ * GstVaapiEncoderH265:cpb-length:
+ *
+ * The size of the CPB buffer in milliseconds.
+ */
+ GST_VAAPI_ENCODER_PROPERTIES_APPEND (props,
+ GST_VAAPI_ENCODER_H265_PROP_CPB_LENGTH,
+ g_param_spec_uint ("cpb-length",
+ "CPB Length", "Length of the CPB buffer in milliseconds",
+ 1, 10000, DEFAULT_CPB_LENGTH,
+ G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
return props;
}
projects / platform / upstream / gstreamer.git / commitdiff