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hevc: add decode hrd 

(cherry picked from commit ab4061dff796b1dd2bc884101226aab48c2c875e)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Mickaël Raulet 2013-10-27 19:33:05 +01:00 committed by Michael Niedermayer
parent 2f77894ccc
commit 0ddd3c5ba6
1 changed files with 79 additions and 8 deletions
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87
libavcodec/hevc_ps.c
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@ -245,9 +245,77 @@ static int decode_profile_tier_level(HEVCLocalContext *lc, PTL *ptl, int max_num
return 0;
}
static void decode_hrd(HEVCContext *s)
static void decode_sublayer_hrd(HEVCContext *s, int nb_cpb, int subpic_params_present)
{
av_log(s->avctx, AV_LOG_ERROR, "HRD parsing not yet implemented\n");
GetBitContext *gb = &s->HEVClc->gb;
int i;
for (i = 0; i < nb_cpb; i++) {
get_ue_golomb_long(gb); // bit_rate_value_minus1
get_ue_golomb_long(gb); // cpb_size_value_minus1
if (subpic_params_present) {
get_ue_golomb_long(gb); // cpb_size_du_value_minus1
get_ue_golomb_long(gb); // bit_rate_du_value_minus1
}
skip_bits1(gb); // cbr_flag
}
}
static void decode_hrd(HEVCContext *s, int common_inf_present, int max_sublayers)
{
GetBitContext *gb = &s->HEVClc->gb;
int nal_params_present = 0, vcl_params_present = 0;
int subpic_params_present = 0;
int i;
if (common_inf_present) {
nal_params_present = get_bits1(gb);
vcl_params_present = get_bits1(gb);
if (nal_params_present || vcl_params_present) {
subpic_params_present = get_bits1(gb);
if (subpic_params_present) {
skip_bits(gb, 8); // tick_divisor_minus2
skip_bits(gb, 5); // du_cpb_removal_delay_increment_length_minus1
skip_bits(gb, 1); // sub_pic_cpb_params_in_pic_timing_sei_flag
skip_bits(gb, 5); // dpb_output_delay_du_length_minus1
}
skip_bits(gb, 4); // bit_rate_scale
skip_bits(gb, 4); // cpb_size_scale
if (subpic_params_present)
skip_bits(gb, 4); // cpb_size_du_scale
skip_bits(gb, 5); // initial_cpb_removal_delay_length_minus1
skip_bits(gb, 5); // au_cpb_removal_delay_length_minus1
skip_bits(gb, 5); // dpb_output_delay_length_minus1
}
}
for (i = 0; i < max_sublayers; i++) {
int low_delay = 0;
int nb_cpb = 1;
int fixed_rate = get_bits1(gb);
if (!fixed_rate)
fixed_rate = get_bits1(gb);
if (fixed_rate)
get_ue_golomb_long(gb); // elemental_duration_in_tc_minus1
else
low_delay = get_bits1(gb);
if (!low_delay)
nb_cpb = get_ue_golomb_long(gb) + 1;
if (nal_params_present)
decode_sublayer_hrd(s, nb_cpb, subpic_params_present);
if (vcl_params_present)
decode_sublayer_hrd(s, nb_cpb, subpic_params_present);
}
}
int ff_hevc_decode_nal_vps(HEVCContext *s)
@ -327,10 +395,13 @@ int ff_hevc_decode_nal_vps(HEVCContext *s)
if (vps->vps_poc_proportional_to_timing_flag)
vps->vps_num_ticks_poc_diff_one = get_ue_golomb_long(gb) + 1;
vps->vps_num_hrd_parameters = get_ue_golomb_long(gb);
if (vps->vps_num_hrd_parameters != 0) {
avpriv_report_missing_feature(s->avctx, "support for vps_num_hrd_parameters != 0");
av_free(vps);
return AVERROR_PATCHWELCOME;
for (i = 0; i < vps->vps_num_hrd_parameters; i++) {
int common_inf_present = 1;
get_ue_golomb_long(gb); // hrd_layer_set_idx
if (i)
common_inf_present = get_bits1(gb);
decode_hrd(s, common_inf_present, vps->vps_max_sub_layers);
}
}
get_bits1(gb); /* vps_extension_flag */
@ -425,7 +496,7 @@ static void decode_vui(HEVCContext *s, HEVCSPS *sps)
vui->vui_num_ticks_poc_diff_one_minus1 = get_ue_golomb_long(gb);
vui->vui_hrd_parameters_present_flag = get_bits1(gb);
if (vui->vui_hrd_parameters_present_flag)
decode_hrd(s);
decode_hrd(s, 1, sps->max_sub_layers);
}
vui->bitstream_restriction_flag = get_bits1(gb);
@ -755,7 +826,7 @@ int ff_hevc_decode_nal_sps(HEVCContext *s)
sps->sps_temporal_mvp_enabled_flag = get_bits1(gb);
sps->sps_strong_intra_smoothing_enable_flag = get_bits1(gb);
sps->vui.sar = vui_sar[0];
sps->vui.sar = (AVRational){0, 1};
vui_present = get_bits1(gb);
if (vui_present)
decode_vui(s, sps);