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vaapi_h265: Add constant-bitrate encode support

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Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Mark Thompson 2016-04-12 23:18:13 +01:00 committed by Anton Khirnov
parent fcf536b130
commit f70e462793
1 changed files with 109 additions and 23 deletions
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132
libavcodec/vaapi_encode_h265.c
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@ -182,6 +182,16 @@ typedef struct VAAPIEncodeH265Context {
int fixed_qp_b;
int64_t last_idr_frame;
// Rate control configuration.
struct {
VAEncMiscParameterBuffer misc;
VAEncMiscParameterRateControl rc;
} rc_params;
struct {
VAEncMiscParameterBuffer misc;
VAEncMiscParameterHRD hrd;
} hrd_params;
} VAAPIEncodeH265Context;
@ -806,6 +816,19 @@ static int vaapi_encode_h265_init_sequence_params(AVCodecContext *avctx)
vseq->max_transform_hierarchy_depth_intra = 3;
vseq->vui_parameters_present_flag = 0;
vseq->bits_per_second = avctx->bit_rate;
if (avctx->framerate.num > 0 && avctx->framerate.den > 0) {
vseq->vui_num_units_in_tick = avctx->framerate.num;
vseq->vui_time_scale = avctx->framerate.den;
} else {
vseq->vui_num_units_in_tick = avctx->time_base.num;
vseq->vui_time_scale = avctx->time_base.den;
}
vseq->intra_period = ctx->p_per_i * (ctx->b_per_p + 1);
vseq->intra_idr_period = vseq->intra_period;
vseq->ip_period = ctx->b_per_p + 1;
}
{
@ -841,8 +864,7 @@ static int vaapi_encode_h265_init_sequence_params(AVCodecContext *avctx)
vpic->pic_fields.bits.screen_content_flag = 0;
vpic->pic_fields.bits.enable_gpu_weighted_prediction = 0;
//vpic->pic_fields.bits.cu_qp_delta_enabled_flag = 1;
vpic->pic_fields.bits.cu_qp_delta_enabled_flag = 1;
}
{
@ -1125,6 +1147,79 @@ static int vaapi_encode_h265_init_slice_params(AVCodecContext *avctx,
return 0;
}
static av_cold int vaapi_encode_h265_init_constant_bitrate(AVCodecContext *avctx)
{
VAAPIEncodeContext *ctx = avctx->priv_data;
VAAPIEncodeH265Context *priv = ctx->priv_data;
int hrd_buffer_size;
int hrd_initial_buffer_fullness;
if (avctx->rc_buffer_size)
hrd_buffer_size = avctx->rc_buffer_size;
else
hrd_buffer_size = avctx->bit_rate;
if (avctx->rc_initial_buffer_occupancy)
hrd_initial_buffer_fullness = avctx->rc_initial_buffer_occupancy;
else
hrd_initial_buffer_fullness = hrd_buffer_size * 3 / 4;
priv->rc_params.misc.type = VAEncMiscParameterTypeRateControl;
priv->rc_params.rc = (VAEncMiscParameterRateControl) {
.bits_per_second = avctx->bit_rate,
.target_percentage = 66,
.window_size = 1000,
.initial_qp = (avctx->qmax >= 0 ? avctx->qmax : 40),
.min_qp = (avctx->qmin >= 0 ? avctx->qmin : 20),
.basic_unit_size = 0,
};
ctx->global_params[ctx->nb_global_params] =
&priv->rc_params.misc;
ctx->global_params_size[ctx->nb_global_params++] =
sizeof(priv->rc_params);
priv->hrd_params.misc.type = VAEncMiscParameterTypeHRD;
priv->hrd_params.hrd = (VAEncMiscParameterHRD) {
.initial_buffer_fullness = hrd_initial_buffer_fullness,
.buffer_size = hrd_buffer_size,
};
ctx->global_params[ctx->nb_global_params] =
&priv->hrd_params.misc;
ctx->global_params_size[ctx->nb_global_params++] =
sizeof(priv->hrd_params);
// These still need to be set for pic_init_qp/slice_qp_delta.
priv->fixed_qp_idr = 30;
priv->fixed_qp_p = 30;
priv->fixed_qp_b = 30;
av_log(avctx, AV_LOG_DEBUG, "Using constant-bitrate = %d bps.\n",
avctx->bit_rate);
return 0;
}
static av_cold int vaapi_encode_h265_init_fixed_qp(AVCodecContext *avctx)
{
VAAPIEncodeContext *ctx = avctx->priv_data;
VAAPIEncodeH265Context *priv = ctx->priv_data;
priv->fixed_qp_p = avctx->global_quality;
if (avctx->i_quant_factor > 0.0)
priv->fixed_qp_idr = (int)((priv->fixed_qp_p * avctx->i_quant_factor +
avctx->i_quant_offset) + 0.5);
else
priv->fixed_qp_idr = priv->fixed_qp_p;
if (avctx->b_quant_factor > 0.0)
priv->fixed_qp_b = (int)((priv->fixed_qp_p * avctx->b_quant_factor +
avctx->b_quant_offset) + 0.5);
else
priv->fixed_qp_b = priv->fixed_qp_p;
av_log(avctx, AV_LOG_DEBUG, "Using fixed QP = "
"%d / %d / %d for IDR / P / B frames.\n",
priv->fixed_qp_idr, priv->fixed_qp_p, priv->fixed_qp_b);
return 0;
}
static av_cold int vaapi_encode_h265_init_internal(AVCodecContext *avctx)
{
static const VAConfigAttrib default_config_attributes[] = {
@ -1133,13 +1228,11 @@ static av_cold int vaapi_encode_h265_init_internal(AVCodecContext *avctx)
{ .type = VAConfigAttribEncPackedHeaders,
.value = (VA_ENC_PACKED_HEADER_SEQUENCE |
VA_ENC_PACKED_HEADER_SLICE) },
{ .type = VAConfigAttribRateControl,
.value = VA_RC_CQP },
};
VAAPIEncodeContext *ctx = avctx->priv_data;
VAAPIEncodeH265Context *priv = ctx->priv_data;
int i;
int i, err;
switch (avctx->profile) {
case FF_PROFILE_HEVC_MAIN:
@ -1174,26 +1267,19 @@ static av_cold int vaapi_encode_h265_init_internal(AVCodecContext *avctx)
}
if (avctx->bit_rate > 0) {
av_log(avctx, AV_LOG_ERROR, "H.265 constant-bitrate encoding "
"is not supported.\n");
return AVERROR_PATCHWELCOME;
ctx->va_rc_mode = VA_RC_CBR;
err = vaapi_encode_h265_init_constant_bitrate(avctx);
} else {
ctx->va_rc_mode = VA_RC_CQP;
err = vaapi_encode_h265_init_fixed_qp(avctx);
}
if (err < 0)
return err;
ctx->va_rc_mode = VA_RC_CQP;
priv->fixed_qp_p = avctx->global_quality;
if (avctx->i_quant_factor > 0.0)
priv->fixed_qp_idr = (int)((priv->fixed_qp_p * avctx->i_quant_factor +
avctx->i_quant_offset) + 0.5);
else
priv->fixed_qp_idr = priv->fixed_qp_p;
if (avctx->b_quant_factor > 0.0)
priv->fixed_qp_b = (int)((priv->fixed_qp_p * avctx->b_quant_factor +
avctx->b_quant_offset) + 0.5);
else
priv->fixed_qp_b = priv->fixed_qp_p;
av_log(avctx, AV_LOG_DEBUG, "QP = %d / %d / %d for IDR / P / B frames.\n",
priv->fixed_qp_idr, priv->fixed_qp_p, priv->fixed_qp_b);
ctx->config_attributes[ctx->nb_config_attributes++] = (VAConfigAttrib) {
.type = VAConfigAttribRateControl,
.value = ctx->va_rc_mode,
};
ctx->nb_recon_frames = 20;