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encoder: h264: support "high-compression" tuning option.

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Add support for "high-compression" tuning option. First, determine the
largest supported profile by the hardware. Next, check any target limit
set by the user. Then, enable each individual coding tool based on the
resulting profile_idc value to use.

https://bugzilla.gnome.org/show_bug.cgi?id=719696
This commit is contained in:
Gwenole Beauchesne 2014-01-13 11:11:25 +01:00
parent bdf91aa765
commit 7b1233faa8
1 changed files with 49 additions and 2 deletions
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51
gst-libs/gst/vaapi/gstvaapiencoder_h264.c
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@ -45,8 +45,9 @@
GST_VAAPI_RATECONTROL_MASK (VBR_CONSTRAINED))
/* Supported set of tuning options, within this implementation */
#define SUPPORTED_TUNE_OPTIONS \
(GST_VAAPI_ENCODER_TUNE_MASK (NONE))
#define SUPPORTED_TUNE_OPTIONS \
(GST_VAAPI_ENCODER_TUNE_MASK (NONE) | \
GST_VAAPI_ENCODER_TUNE_MASK (HIGH_COMPRESSION))
#define GST_VAAPI_ENCODER_H264_NAL_REF_IDC_NONE 0
#define GST_VAAPI_ENCODER_H264_NAL_REF_IDC_LOW 1
@ -316,6 +317,50 @@ error_unsupported_level:
}
}
/* Enable "high-compression" tuning options */
static gboolean
ensure_tuning_high_compression (GstVaapiEncoderH264 * encoder)
{
guint8 profile_idc;
if (!ensure_hw_profile_limits (encoder))
return FALSE;
profile_idc = encoder->hw_max_profile_idc;
if (encoder->max_profile_idc && encoder->max_profile_idc < profile_idc)
profile_idc = encoder->max_profile_idc;
/* Tuning options to enable Main profile */
if (profile_idc >= 77) {
encoder->use_cabac = TRUE;
if (!encoder->num_bframes)
encoder->num_bframes = 1;
}
/* Tuning options to enable High profile */
if (profile_idc >= 100) {
encoder->use_dct8x8 = TRUE;
}
return TRUE;
}
/* Ensure tuning options */
static gboolean
ensure_tuning (GstVaapiEncoderH264 * encoder)
{
gboolean success;
switch (GST_VAAPI_ENCODER_TUNE (encoder)) {
case GST_VAAPI_ENCODER_TUNE_HIGH_COMPRESSION:
success = ensure_tuning_high_compression (encoder);
break;
default:
success = TRUE;
break;
}
return success;
}
static inline void
_reset_gop_start (GstVaapiEncoderH264 * encoder)
{
@ -1294,6 +1339,8 @@ ensure_misc (GstVaapiEncoderH264 * encoder, GstVaapiEncPicture * picture)
static GstVaapiEncoderStatus
ensure_profile_and_level (GstVaapiEncoderH264 * encoder)
{
ensure_tuning (encoder);
if (!ensure_profile (encoder) || !ensure_profile_limits (encoder))
return GST_VAAPI_ENCODER_STATUS_ERROR_UNSUPPORTED_PROFILE;