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libs: encoder: vp8: add CBR encoding mode

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This patch enables the Constant BitRate encoding mode in VP8 encoder.
Basically it adds the configuration parameters required by libva to
CBR enconding.

Original-Patch-By: Víctor Manuel Jáquez Leal <victorx.jaquez@intel.com>

https://bugzilla.gnome.org/show_bug.cgi?id=749950
This commit is contained in:
Hyunjun Ko 2017-02-10 09:51:38 +09:00 committed by Víctor Manuel Jáquez Leal
parent ffc5b43da7
commit b6a3e88059
1 changed files with 67 additions and 1 deletions
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68
gst-libs/gst/vaapi/gstvaapiencoder_vp8.c
View file

@ -39,7 +39,8 @@
/* 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 \
@ -256,6 +257,65 @@ error:
}
}
static gboolean
ensure_misc_params (GstVaapiEncoderVP8 * encoder, GstVaapiEncPicture * picture)
{
GstVaapiEncoder *const base_encoder = GST_VAAPI_ENCODER_CAST (encoder);
GstVaapiEncMiscParam *misc;
if (GST_VAAPI_ENCODER_RATE_CONTROL (encoder) != GST_VAAPI_RATECONTROL_CBR)
return TRUE;
misc = GST_VAAPI_ENC_MISC_PARAM_NEW (FrameRate, encoder);
if (!misc)
return FALSE;
{
VAEncMiscParameterFrameRate *param = misc->data;
param->framerate =
GST_VAAPI_ENCODER_FPS_N (encoder) / GST_VAAPI_ENCODER_FPS_D (encoder);
}
gst_vaapi_enc_picture_add_misc_param (picture, misc);
gst_vaapi_codec_object_replace (&misc, NULL);
misc = GST_VAAPI_ENC_MISC_PARAM_NEW (HRD, encoder);
if (!misc)
return FALSE;
{
VAEncMiscParameterHRD *hrd = misc->data;
if (base_encoder->bitrate > 0) {
hrd->buffer_size = base_encoder->bitrate * 1000 * 2;
hrd->initial_buffer_fullness = base_encoder->bitrate * 1000;
} else {
hrd->buffer_size = 0;
hrd->initial_buffer_fullness = 0;
}
}
gst_vaapi_enc_picture_add_misc_param (picture, misc);
gst_vaapi_codec_object_replace (&misc, NULL);
/* RateControl params */
misc = GST_VAAPI_ENC_MISC_PARAM_NEW (RateControl, encoder);
if (!misc)
return FALSE;
{
VAEncMiscParameterRateControl *rate_control;
rate_control = misc->data;
rate_control->bits_per_second = base_encoder->bitrate * 1000;
rate_control->target_percentage = 70;
/* CPB (Coded picture buffer) length in milliseconds, which could
* be provided as a property */
rate_control->window_size = 500;
rate_control->initial_qp = encoder->yac_qi;
rate_control->min_qp = 1;
}
gst_vaapi_enc_picture_add_misc_param (picture, misc);
gst_vaapi_codec_object_replace (&misc, NULL);
return TRUE;
}
static gboolean
fill_picture (GstVaapiEncoderVP8 * encoder,
GstVaapiEncPicture * picture,
@ -303,6 +363,10 @@ fill_picture (GstVaapiEncoderVP8 * encoder,
pic_param->sharpness_level = encoder->sharpness_level;
/* Used for CBR */
pic_param->clamp_qindex_low = 0;
pic_param->clamp_qindex_high = 127;
return TRUE;
}
@ -375,6 +439,8 @@ gst_vaapi_encoder_vp8_encode (GstVaapiEncoder * base_encoder,
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_quantization_table (encoder, picture))