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third_party_ffmpeg/libavcodec/hevc_ps.c
James Almer ba625dd8a1 avcodec: use av_mod_uintp2() where useful 
Reviewed-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: James Almer <jamrial@gmail.com>
2015-04-21 22:41:20 -03:00

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/*
* HEVC Parameter Set decoding
*
* Copyright (C) 2012 - 2103 Guillaume Martres
* Copyright (C) 2012 - 2103 Mickael Raulet
* Copyright (C) 2012 - 2013 Gildas Cocherel
* Copyright (C) 2013 Vittorio Giovara
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/imgutils.h"
#include "golomb.h"
#include "hevc.h"
static const uint8_t default_scaling_list_intra[] = {
16, 16, 16, 16, 17, 18, 21, 24,
16, 16, 16, 16, 17, 19, 22, 25,
16, 16, 17, 18, 20, 22, 25, 29,
16, 16, 18, 21, 24, 27, 31, 36,
17, 17, 20, 24, 30, 35, 41, 47,
18, 19, 22, 27, 35, 44, 54, 65,
21, 22, 25, 31, 41, 54, 70, 88,
24, 25, 29, 36, 47, 65, 88, 115
};
static const uint8_t default_scaling_list_inter[] = {
16, 16, 16, 16, 17, 18, 20, 24,
16, 16, 16, 17, 18, 20, 24, 25,
16, 16, 17, 18, 20, 24, 25, 28,
16, 17, 18, 20, 24, 25, 28, 33,
17, 18, 20, 24, 25, 28, 33, 41,
18, 20, 24, 25, 28, 33, 41, 54,
20, 24, 25, 28, 33, 41, 54, 71,
24, 25, 28, 33, 41, 54, 71, 91
};
static const AVRational vui_sar[] = {
{ 0, 1 },
{ 1, 1 },
{ 12, 11 },
{ 10, 11 },
{ 16, 11 },
{ 40, 33 },
{ 24, 11 },
{ 20, 11 },
{ 32, 11 },
{ 80, 33 },
{ 18, 11 },
{ 15, 11 },
{ 64, 33 },
{ 160, 99 },
{ 4, 3 },
{ 3, 2 },
{ 2, 1 },
};
static void remove_pps(HEVCContext *s, int id)
{
if (s->pps_list[id] && s->pps == (const HEVCPPS*)s->pps_list[id]->data)
s->pps = NULL;
av_buffer_unref(&s->pps_list[id]);
}
static void remove_sps(HEVCContext *s, int id)
{
int i;
if (s->sps_list[id]) {
if (s->sps == (const HEVCSPS*)s->sps_list[id]->data)
s->sps = NULL;
/* drop all PPS that depend on this SPS */
for (i = 0; i < FF_ARRAY_ELEMS(s->pps_list); i++)
if (s->pps_list[i] && ((HEVCPPS*)s->pps_list[i]->data)->sps_id == id)
remove_pps(s, i);
if (s->sps_list[id] && s->sps == (HEVCSPS*)s->sps_list[id]->data) {
av_buffer_unref(&s->current_sps);
s->current_sps = av_buffer_ref(s->sps_list[id]);
if (!s->current_sps)
s->sps = NULL;
}
}
av_buffer_unref(&s->sps_list[id]);
}
static void remove_vps(HEVCContext *s, int id)
{
int i;
if (s->vps_list[id]) {
if (s->vps == (const HEVCVPS*)s->vps_list[id]->data)
s->vps = NULL;
for (i = 0; i < FF_ARRAY_ELEMS(s->sps_list); i++)
if (s->sps_list[i] && ((HEVCSPS*)s->sps_list[i]->data)->vps_id == id)
remove_sps(s, i);
}
av_buffer_unref(&s->vps_list[id]);
}
int ff_hevc_decode_short_term_rps(HEVCContext *s, ShortTermRPS *rps,
const HEVCSPS *sps, int is_slice_header)
{
HEVCLocalContext *lc = s->HEVClc;
uint8_t rps_predict = 0;
int delta_poc;
int k0 = 0;
int k1 = 0;
int k = 0;
int i;
GetBitContext *gb = &lc->gb;
if (rps != sps->st_rps && sps->nb_st_rps)
rps_predict = get_bits1(gb);
if (rps_predict) {
const ShortTermRPS *rps_ridx;
int delta_rps;
unsigned abs_delta_rps;
uint8_t use_delta_flag = 0;
uint8_t delta_rps_sign;
if (is_slice_header) {
unsigned int delta_idx = get_ue_golomb_long(gb) + 1;
if (delta_idx > sps->nb_st_rps) {
av_log(s->avctx, AV_LOG_ERROR,
"Invalid value of delta_idx in slice header RPS: %d > %d.\n",
delta_idx, sps->nb_st_rps);
return AVERROR_INVALIDDATA;
}
rps_ridx = &sps->st_rps[sps->nb_st_rps - delta_idx];
} else
rps_ridx = &sps->st_rps[rps - sps->st_rps - 1];
delta_rps_sign = get_bits1(gb);
abs_delta_rps = get_ue_golomb_long(gb) + 1;
if (abs_delta_rps < 1 || abs_delta_rps > 32768) {
av_log(s->avctx, AV_LOG_ERROR,
"Invalid value of abs_delta_rps: %d\n",
abs_delta_rps);
return AVERROR_INVALIDDATA;
}
delta_rps = (1 - (delta_rps_sign << 1)) * abs_delta_rps;
for (i = 0; i <= rps_ridx->num_delta_pocs; i++) {
int used = rps->used[k] = get_bits1(gb);
if (!used)
use_delta_flag = get_bits1(gb);
if (used || use_delta_flag) {
if (i < rps_ridx->num_delta_pocs)
delta_poc = delta_rps + rps_ridx->delta_poc[i];
else
delta_poc = delta_rps;
rps->delta_poc[k] = delta_poc;
if (delta_poc < 0)
k0++;
else
k1++;
k++;
}
}
rps->num_delta_pocs = k;
rps->num_negative_pics = k0;
// sort in increasing order (smallest first)
if (rps->num_delta_pocs != 0) {
int used, tmp;
for (i = 1; i < rps->num_delta_pocs; i++) {
delta_poc = rps->delta_poc[i];
used = rps->used[i];
for (k = i - 1; k >= 0; k--) {
tmp = rps->delta_poc[k];
if (delta_poc < tmp) {
rps->delta_poc[k + 1] = tmp;
rps->used[k + 1] = rps->used[k];
rps->delta_poc[k] = delta_poc;
rps->used[k] = used;
}
}
}
}
if ((rps->num_negative_pics >> 1) != 0) {
int used;
k = rps->num_negative_pics - 1;
// flip the negative values to largest first
for (i = 0; i < rps->num_negative_pics >> 1; i++) {
delta_poc = rps->delta_poc[i];
used = rps->used[i];
rps->delta_poc[i] = rps->delta_poc[k];
rps->used[i] = rps->used[k];
rps->delta_poc[k] = delta_poc;
rps->used[k] = used;
k--;
}
}
} else {
unsigned int prev, nb_positive_pics;
rps->num_negative_pics = get_ue_golomb_long(gb);
nb_positive_pics = get_ue_golomb_long(gb);
if (rps->num_negative_pics >= MAX_REFS ||
nb_positive_pics >= MAX_REFS) {
av_log(s->avctx, AV_LOG_ERROR, "Too many refs in a short term RPS.\n");
return AVERROR_INVALIDDATA;
}
rps->num_delta_pocs = rps->num_negative_pics + nb_positive_pics;
if (rps->num_delta_pocs) {
prev = 0;
for (i = 0; i < rps->num_negative_pics; i++) {
delta_poc = get_ue_golomb_long(gb) + 1;
prev -= delta_poc;
rps->delta_poc[i] = prev;
rps->used[i] = get_bits1(gb);
}
prev = 0;
for (i = 0; i < nb_positive_pics; i++) {
delta_poc = get_ue_golomb_long(gb) + 1;
prev += delta_poc;
rps->delta_poc[rps->num_negative_pics + i] = prev;
rps->used[rps->num_negative_pics + i] = get_bits1(gb);
}
}
}
return 0;
}
static int decode_profile_tier_level(HEVCContext *s, PTLCommon *ptl)
{
int i;
HEVCLocalContext *lc = s->HEVClc;
GetBitContext *gb = &lc->gb;
if (get_bits_left(gb) < 2+1+5 + 32 + 4 + 16 + 16 + 12)
return -1;
ptl->profile_space = get_bits(gb, 2);
ptl->tier_flag = get_bits1(gb);
ptl->profile_idc = get_bits(gb, 5);
if (ptl->profile_idc == FF_PROFILE_HEVC_MAIN)
av_log(s->avctx, AV_LOG_DEBUG, "Main profile bitstream\n");
else if (ptl->profile_idc == FF_PROFILE_HEVC_MAIN_10)
av_log(s->avctx, AV_LOG_DEBUG, "Main 10 profile bitstream\n");
else if (ptl->profile_idc == FF_PROFILE_HEVC_MAIN_STILL_PICTURE)
av_log(s->avctx, AV_LOG_DEBUG, "Main Still Picture profile bitstream\n");
else if (ptl->profile_idc == FF_PROFILE_HEVC_REXT)
av_log(s->avctx, AV_LOG_DEBUG, "Range Extension profile bitstream\n");
else
av_log(s->avctx, AV_LOG_WARNING, "Unknown HEVC profile: %d\n", ptl->profile_idc);
for (i = 0; i < 32; i++)
ptl->profile_compatibility_flag[i] = get_bits1(gb);
ptl->progressive_source_flag = get_bits1(gb);
ptl->interlaced_source_flag = get_bits1(gb);
ptl->non_packed_constraint_flag = get_bits1(gb);
ptl->frame_only_constraint_flag = get_bits1(gb);
skip_bits(gb, 16); // XXX_reserved_zero_44bits[0..15]
skip_bits(gb, 16); // XXX_reserved_zero_44bits[16..31]
skip_bits(gb, 12); // XXX_reserved_zero_44bits[32..43]
return 0;
}
static int parse_ptl(HEVCContext *s, PTL *ptl, int max_num_sub_layers)
{
int i;
HEVCLocalContext *lc = s->HEVClc;
GetBitContext *gb = &lc->gb;
if (decode_profile_tier_level(s, &ptl->general_ptl) < 0 ||
get_bits_left(gb) < 8 + 8*2) {
av_log(s->avctx, AV_LOG_ERROR, "PTL information too short\n");
return -1;
}
ptl->general_ptl.level_idc = get_bits(gb, 8);
for (i = 0; i < max_num_sub_layers - 1; i++) {
ptl->sub_layer_profile_present_flag[i] = get_bits1(gb);
ptl->sub_layer_level_present_flag[i] = get_bits1(gb);
}
if (max_num_sub_layers - 1> 0)
for (i = max_num_sub_layers - 1; i < 8; i++)
skip_bits(gb, 2); // reserved_zero_2bits[i]
for (i = 0; i < max_num_sub_layers - 1; i++) {
if (ptl->sub_layer_profile_present_flag[i] &&
decode_profile_tier_level(s, &ptl->sub_layer_ptl[i]) < 0) {
av_log(s->avctx, AV_LOG_ERROR,
"PTL information for sublayer %i too short\n", i);
return -1;
}
if (ptl->sub_layer_level_present_flag[i]) {
if (get_bits_left(gb) < 8) {
av_log(s->avctx, AV_LOG_ERROR,
"Not enough data for sublayer %i level_idc\n", i);
return -1;
} else
ptl->sub_layer_ptl[i].level_idc = get_bits(gb, 8);
}
}
return 0;
}
static void decode_sublayer_hrd(HEVCContext *s, unsigned int nb_cpb,
int subpic_params_present)
{
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 int 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;
unsigned 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 (nb_cpb < 1 || nb_cpb > 32) {
av_log(s->avctx, AV_LOG_ERROR, "nb_cpb %d invalid\n", nb_cpb);
return AVERROR_INVALIDDATA;
}
}
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);
}
return 0;
}
int ff_hevc_decode_nal_vps(HEVCContext *s)
{
int i,j;
GetBitContext *gb = &s->HEVClc->gb;
int vps_id = 0;
HEVCVPS *vps;
AVBufferRef *vps_buf = av_buffer_allocz(sizeof(*vps));
if (!vps_buf)
return AVERROR(ENOMEM);
vps = (HEVCVPS*)vps_buf->data;
av_log(s->avctx, AV_LOG_DEBUG, "Decoding VPS\n");
vps_id = get_bits(gb, 4);
if (vps_id >= MAX_VPS_COUNT) {
av_log(s->avctx, AV_LOG_ERROR, "VPS id out of range: %d\n", vps_id);
goto err;
}
if (get_bits(gb, 2) != 3) { // vps_reserved_three_2bits
av_log(s->avctx, AV_LOG_ERROR, "vps_reserved_three_2bits is not three\n");
goto err;
}
vps->vps_max_layers = get_bits(gb, 6) + 1;
vps->vps_max_sub_layers = get_bits(gb, 3) + 1;
vps->vps_temporal_id_nesting_flag = get_bits1(gb);
if (get_bits(gb, 16) != 0xffff) { // vps_reserved_ffff_16bits
av_log(s->avctx, AV_LOG_ERROR, "vps_reserved_ffff_16bits is not 0xffff\n");
goto err;
}
if (vps->vps_max_sub_layers > MAX_SUB_LAYERS) {
av_log(s->avctx, AV_LOG_ERROR, "vps_max_sub_layers out of range: %d\n",
vps->vps_max_sub_layers);
goto err;
}
if (parse_ptl(s, &vps->ptl, vps->vps_max_sub_layers) < 0)
goto err;
vps->vps_sub_layer_ordering_info_present_flag = get_bits1(gb);
i = vps->vps_sub_layer_ordering_info_present_flag ? 0 : vps->vps_max_sub_layers - 1;
for (; i < vps->vps_max_sub_layers; i++) {
vps->vps_max_dec_pic_buffering[i] = get_ue_golomb_long(gb) + 1;
vps->vps_num_reorder_pics[i] = get_ue_golomb_long(gb);
vps->vps_max_latency_increase[i] = get_ue_golomb_long(gb) - 1;
if (vps->vps_max_dec_pic_buffering[i] > MAX_DPB_SIZE || !vps->vps_max_dec_pic_buffering[i]) {
av_log(s->avctx, AV_LOG_ERROR, "vps_max_dec_pic_buffering_minus1 out of range: %d\n",
vps->vps_max_dec_pic_buffering[i] - 1);
goto err;
}
if (vps->vps_num_reorder_pics[i] > vps->vps_max_dec_pic_buffering[i] - 1) {
av_log(s->avctx, AV_LOG_WARNING, "vps_max_num_reorder_pics out of range: %d\n",
vps->vps_num_reorder_pics[i]);
if (s->avctx->err_recognition & AV_EF_EXPLODE)
goto err;
}
}
vps->vps_max_layer_id = get_bits(gb, 6);
vps->vps_num_layer_sets = get_ue_golomb_long(gb) + 1;
if ((vps->vps_num_layer_sets - 1LL) * (vps->vps_max_layer_id + 1LL) > get_bits_left(gb)) {
av_log(s->avctx, AV_LOG_ERROR, "too many layer_id_included_flags\n");
goto err;
}
for (i = 1; i < vps->vps_num_layer_sets; i++)
for (j = 0; j <= vps->vps_max_layer_id; j++)
skip_bits(gb, 1); // layer_id_included_flag[i][j]
vps->vps_timing_info_present_flag = get_bits1(gb);
if (vps->vps_timing_info_present_flag) {
vps->vps_num_units_in_tick = get_bits_long(gb, 32);
vps->vps_time_scale = get_bits_long(gb, 32);
vps->vps_poc_proportional_to_timing_flag = get_bits1(gb);
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);
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 */
if (get_bits_left(gb) < 0) {
av_log(s->avctx, AV_LOG_ERROR,
"Overread VPS by %d bits\n", -get_bits_left(gb));
goto err;
}
if (s->vps_list[vps_id] &&
!memcmp(s->vps_list[vps_id]->data, vps_buf->data, vps_buf->size)) {
av_buffer_unref(&vps_buf);
} else {
remove_vps(s, vps_id);
s->vps_list[vps_id] = vps_buf;
}
return 0;
err:
av_buffer_unref(&vps_buf);
return AVERROR_INVALIDDATA;
}
static void decode_vui(HEVCContext *s, HEVCSPS *sps)
{
VUI *vui = &sps->vui;
GetBitContext *gb = &s->HEVClc->gb;
GetBitContext backup;
int sar_present, alt = 0;
av_log(s->avctx, AV_LOG_DEBUG, "Decoding VUI\n");
sar_present = get_bits1(gb);
if (sar_present) {
uint8_t sar_idx = get_bits(gb, 8);
if (sar_idx < FF_ARRAY_ELEMS(vui_sar))
vui->sar = vui_sar[sar_idx];
else if (sar_idx == 255) {
vui->sar.num = get_bits(gb, 16);
vui->sar.den = get_bits(gb, 16);
} else
av_log(s->avctx, AV_LOG_WARNING,
"Unknown SAR index: %u.\n", sar_idx);
}
vui->overscan_info_present_flag = get_bits1(gb);
if (vui->overscan_info_present_flag)
vui->overscan_appropriate_flag = get_bits1(gb);
vui->video_signal_type_present_flag = get_bits1(gb);
if (vui->video_signal_type_present_flag) {
vui->video_format = get_bits(gb, 3);
vui->video_full_range_flag = get_bits1(gb);
vui->colour_description_present_flag = get_bits1(gb);
if (vui->video_full_range_flag && sps->pix_fmt == AV_PIX_FMT_YUV420P)
sps->pix_fmt = AV_PIX_FMT_YUVJ420P;
if (vui->colour_description_present_flag) {
vui->colour_primaries = get_bits(gb, 8);
vui->transfer_characteristic = get_bits(gb, 8);
vui->matrix_coeffs = get_bits(gb, 8);
// Set invalid values to "unspecified"
if (vui->colour_primaries >= AVCOL_PRI_NB)
vui->colour_primaries = AVCOL_PRI_UNSPECIFIED;
if (vui->transfer_characteristic >= AVCOL_TRC_NB)
vui->transfer_characteristic = AVCOL_TRC_UNSPECIFIED;
if (vui->matrix_coeffs >= AVCOL_SPC_NB)
vui->matrix_coeffs = AVCOL_SPC_UNSPECIFIED;
}
}
vui->chroma_loc_info_present_flag = get_bits1(gb);
if (vui->chroma_loc_info_present_flag) {
vui->chroma_sample_loc_type_top_field = get_ue_golomb_long(gb);
vui->chroma_sample_loc_type_bottom_field = get_ue_golomb_long(gb);
}
vui->neutra_chroma_indication_flag = get_bits1(gb);
vui->field_seq_flag = get_bits1(gb);
vui->frame_field_info_present_flag = get_bits1(gb);
if (get_bits_left(gb) >= 68 && show_bits_long(gb, 21) == 0x100000) {
vui->default_display_window_flag = 0;
av_log(s->avctx, AV_LOG_WARNING, "Invalid default display window\n");
} else
vui->default_display_window_flag = get_bits1(gb);
// Backup context in case an alternate header is detected
memcpy(&backup, gb, sizeof(backup));
if (vui->default_display_window_flag) {
//TODO: * 2 is only valid for 420
vui->def_disp_win.left_offset = get_ue_golomb_long(gb) * 2;
vui->def_disp_win.right_offset = get_ue_golomb_long(gb) * 2;
vui->def_disp_win.top_offset = get_ue_golomb_long(gb) * 2;
vui->def_disp_win.bottom_offset = get_ue_golomb_long(gb) * 2;
if (s->apply_defdispwin &&
s->avctx->flags2 & CODEC_FLAG2_IGNORE_CROP) {
av_log(s->avctx, AV_LOG_DEBUG,
"discarding vui default display window, "
"original values are l:%u r:%u t:%u b:%u\n",
vui->def_disp_win.left_offset,
vui->def_disp_win.right_offset,
vui->def_disp_win.top_offset,
vui->def_disp_win.bottom_offset);
vui->def_disp_win.left_offset =
vui->def_disp_win.right_offset =
vui->def_disp_win.top_offset =
vui->def_disp_win.bottom_offset = 0;
}
}
vui->vui_timing_info_present_flag = get_bits1(gb);
if (vui->vui_timing_info_present_flag) {
if( get_bits_left(gb) < 66) {
// The alternate syntax seem to have timing info located
// at where def_disp_win is normally located
av_log(s->avctx, AV_LOG_WARNING,
"Strange VUI timing information, retrying...\n");
vui->default_display_window_flag = 0;
memset(&vui->def_disp_win, 0, sizeof(vui->def_disp_win));
memcpy(gb, &backup, sizeof(backup));
alt = 1;
}
vui->vui_num_units_in_tick = get_bits_long(gb, 32);
vui->vui_time_scale = get_bits_long(gb, 32);
if (alt) {
av_log(s->avctx, AV_LOG_INFO, "Retry got %i/%i fps\n",
vui->vui_time_scale, vui->vui_num_units_in_tick);
}
vui->vui_poc_proportional_to_timing_flag = get_bits1(gb);
if (vui->vui_poc_proportional_to_timing_flag)
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, 1, sps->max_sub_layers);
}
vui->bitstream_restriction_flag = get_bits1(gb);
if (vui->bitstream_restriction_flag) {
vui->tiles_fixed_structure_flag = get_bits1(gb);
vui->motion_vectors_over_pic_boundaries_flag = get_bits1(gb);
vui->restricted_ref_pic_lists_flag = get_bits1(gb);
vui->min_spatial_segmentation_idc = get_ue_golomb_long(gb);
vui->max_bytes_per_pic_denom = get_ue_golomb_long(gb);
vui->max_bits_per_min_cu_denom = get_ue_golomb_long(gb);
vui->log2_max_mv_length_horizontal = get_ue_golomb_long(gb);
vui->log2_max_mv_length_vertical = get_ue_golomb_long(gb);
}
}
static void set_default_scaling_list_data(ScalingList *sl)
{
int matrixId;
for (matrixId = 0; matrixId < 6; matrixId++) {
// 4x4 default is 16
memset(sl->sl[0][matrixId], 16, 16);
sl->sl_dc[0][matrixId] = 16; // default for 16x16
sl->sl_dc[1][matrixId] = 16; // default for 32x32
}
memcpy(sl->sl[1][0], default_scaling_list_intra, 64);
memcpy(sl->sl[1][1], default_scaling_list_intra, 64);
memcpy(sl->sl[1][2], default_scaling_list_intra, 64);
memcpy(sl->sl[1][3], default_scaling_list_inter, 64);
memcpy(sl->sl[1][4], default_scaling_list_inter, 64);
memcpy(sl->sl[1][5], default_scaling_list_inter, 64);
memcpy(sl->sl[2][0], default_scaling_list_intra, 64);
memcpy(sl->sl[2][1], default_scaling_list_intra, 64);
memcpy(sl->sl[2][2], default_scaling_list_intra, 64);
memcpy(sl->sl[2][3], default_scaling_list_inter, 64);
memcpy(sl->sl[2][4], default_scaling_list_inter, 64);
memcpy(sl->sl[2][5], default_scaling_list_inter, 64);
memcpy(sl->sl[3][0], default_scaling_list_intra, 64);
memcpy(sl->sl[3][1], default_scaling_list_intra, 64);
memcpy(sl->sl[3][2], default_scaling_list_intra, 64);
memcpy(sl->sl[3][3], default_scaling_list_inter, 64);
memcpy(sl->sl[3][4], default_scaling_list_inter, 64);
memcpy(sl->sl[3][5], default_scaling_list_inter, 64);
}
static int scaling_list_data(HEVCContext *s, ScalingList *sl, HEVCSPS *sps)
{
GetBitContext *gb = &s->HEVClc->gb;
uint8_t scaling_list_pred_mode_flag;
int32_t scaling_list_dc_coef[2][6];
int size_id, matrix_id, pos;
int i;
for (size_id = 0; size_id < 4; size_id++)
for (matrix_id = 0; matrix_id < 6; matrix_id += ((size_id == 3) ? 3 : 1)) {
scaling_list_pred_mode_flag = get_bits1(gb);
if (!scaling_list_pred_mode_flag) {
unsigned int delta = get_ue_golomb_long(gb);
/* Only need to handle non-zero delta. Zero means default,
* which should already be in the arrays. */
if (delta) {
// Copy from previous array.
if (matrix_id < delta) {
av_log(s->avctx, AV_LOG_ERROR,
"Invalid delta in scaling list data: %d.\n", delta);
return AVERROR_INVALIDDATA;
}
memcpy(sl->sl[size_id][matrix_id],
sl->sl[size_id][matrix_id - delta],
size_id > 0 ? 64 : 16);
if (size_id > 1)
sl->sl_dc[size_id - 2][matrix_id] = sl->sl_dc[size_id - 2][matrix_id - delta];
}
} else {
int next_coef, coef_num;
int32_t scaling_list_delta_coef;
next_coef = 8;
coef_num = FFMIN(64, 1 << (4 + (size_id << 1)));
if (size_id > 1) {
scaling_list_dc_coef[size_id - 2][matrix_id] = get_se_golomb(gb) + 8;
next_coef = scaling_list_dc_coef[size_id - 2][matrix_id];
sl->sl_dc[size_id - 2][matrix_id] = next_coef;
}
for (i = 0; i < coef_num; i++) {
if (size_id == 0)
pos = 4 * ff_hevc_diag_scan4x4_y[i] +
ff_hevc_diag_scan4x4_x[i];
else
pos = 8 * ff_hevc_diag_scan8x8_y[i] +
ff_hevc_diag_scan8x8_x[i];
scaling_list_delta_coef = get_se_golomb(gb);
next_coef = (next_coef + scaling_list_delta_coef + 256) % 256;
sl->sl[size_id][matrix_id][pos] = next_coef;
}
}
}
if (sps->chroma_format_idc == 3) {
for (i = 0; i < 64; i++) {
sl->sl[3][1][i] = sl->sl[2][1][i];
sl->sl[3][2][i] = sl->sl[2][2][i];
sl->sl[3][4][i] = sl->sl[2][4][i];
sl->sl[3][5][i] = sl->sl[2][5][i];
}
sl->sl_dc[1][1] = sl->sl_dc[0][1];
sl->sl_dc[1][2] = sl->sl_dc[0][2];
sl->sl_dc[1][4] = sl->sl_dc[0][4];
sl->sl_dc[1][5] = sl->sl_dc[0][5];
}
return 0;
}
int ff_hevc_decode_nal_sps(HEVCContext *s)
{
const AVPixFmtDescriptor *desc;
GetBitContext *gb = &s->HEVClc->gb;
int ret = 0;
unsigned int sps_id = 0;
int log2_diff_max_min_transform_block_size;
int bit_depth_chroma, start, vui_present, sublayer_ordering_info;
int i;
HEVCSPS *sps;
AVBufferRef *sps_buf = av_buffer_allocz(sizeof(*sps));
if (!sps_buf)
return AVERROR(ENOMEM);
sps = (HEVCSPS*)sps_buf->data;
av_log(s->avctx, AV_LOG_DEBUG, "Decoding SPS\n");
// Coded parameters
sps->vps_id = get_bits(gb, 4);
if (sps->vps_id >= MAX_VPS_COUNT) {
av_log(s->avctx, AV_LOG_ERROR, "VPS id out of range: %d\n", sps->vps_id);
ret = AVERROR_INVALIDDATA;
goto err;
}
if (!s->vps_list[sps->vps_id]) {
av_log(s->avctx, AV_LOG_ERROR, "VPS %d does not exist\n",
sps->vps_id);
ret = AVERROR_INVALIDDATA;
goto err;
}
sps->max_sub_layers = get_bits(gb, 3) + 1;
if (sps->max_sub_layers > MAX_SUB_LAYERS) {
av_log(s->avctx, AV_LOG_ERROR, "sps_max_sub_layers out of range: %d\n",
sps->max_sub_layers);
ret = AVERROR_INVALIDDATA;
goto err;
}
skip_bits1(gb); // temporal_id_nesting_flag
if (parse_ptl(s, &sps->ptl, sps->max_sub_layers) < 0)
goto err;
sps_id = get_ue_golomb_long(gb);
if (sps_id >= MAX_SPS_COUNT) {
av_log(s->avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", sps_id);
ret = AVERROR_INVALIDDATA;
goto err;
}
sps->chroma_format_idc = get_ue_golomb_long(gb);
if (sps->chroma_format_idc == 3)
sps->separate_colour_plane_flag = get_bits1(gb);
if (sps->separate_colour_plane_flag)
sps->chroma_format_idc = 0;
sps->width = get_ue_golomb_long(gb);
sps->height = get_ue_golomb_long(gb);
if ((ret = av_image_check_size(sps->width,
sps->height, 0, s->avctx)) < 0)
goto err;
if (get_bits1(gb)) { // pic_conformance_flag
//TODO: * 2 is only valid for 420
sps->pic_conf_win.left_offset = get_ue_golomb_long(gb) * 2;
sps->pic_conf_win.right_offset = get_ue_golomb_long(gb) * 2;
sps->pic_conf_win.top_offset = get_ue_golomb_long(gb) * 2;
sps->pic_conf_win.bottom_offset = get_ue_golomb_long(gb) * 2;
if (s->avctx->flags2 & CODEC_FLAG2_IGNORE_CROP) {
av_log(s->avctx, AV_LOG_DEBUG,
"discarding sps conformance window, "
"original values are l:%u r:%u t:%u b:%u\n",
sps->pic_conf_win.left_offset,
sps->pic_conf_win.right_offset,
sps->pic_conf_win.top_offset,
sps->pic_conf_win.bottom_offset);
sps->pic_conf_win.left_offset =
sps->pic_conf_win.right_offset =
sps->pic_conf_win.top_offset =
sps->pic_conf_win.bottom_offset = 0;
}
sps->output_window = sps->pic_conf_win;
}
sps->bit_depth = get_ue_golomb_long(gb) + 8;
bit_depth_chroma = get_ue_golomb_long(gb) + 8;
if (sps->chroma_format_idc && bit_depth_chroma != sps->bit_depth) {
av_log(s->avctx, AV_LOG_ERROR,
"Luma bit depth (%d) is different from chroma bit depth (%d), "
"this is unsupported.\n",
sps->bit_depth, bit_depth_chroma);
ret = AVERROR_INVALIDDATA;
goto err;
}
switch (sps->bit_depth) {
case 8:
if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY8;
if (sps->chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P;
if (sps->chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P;
if (sps->chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P;
break;
case 9:
if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY16;
if (sps->chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P9;
if (sps->chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P9;
if (sps->chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P9;
break;
case 10:
if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY16;
if (sps->chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P10;
if (sps->chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P10;
if (sps->chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P10;
break;
case 12:
if (sps->chroma_format_idc == 0) sps->pix_fmt = AV_PIX_FMT_GRAY16;
if (sps->chroma_format_idc == 1) sps->pix_fmt = AV_PIX_FMT_YUV420P12;
if (sps->chroma_format_idc == 2) sps->pix_fmt = AV_PIX_FMT_YUV422P12;
if (sps->chroma_format_idc == 3) sps->pix_fmt = AV_PIX_FMT_YUV444P12;
break;
default:
av_log(s->avctx, AV_LOG_ERROR,
"4:2:0, 4:2:2, 4:4:4 supports are currently specified for 8, 10 and 12 bits.\n");
ret = AVERROR_PATCHWELCOME;
goto err;
}
desc = av_pix_fmt_desc_get(sps->pix_fmt);
if (!desc) {
ret = AVERROR(EINVAL);
goto err;
}
sps->hshift[0] = sps->vshift[0] = 0;
sps->hshift[2] = sps->hshift[1] = desc->log2_chroma_w;
sps->vshift[2] = sps->vshift[1] = desc->log2_chroma_h;
sps->pixel_shift = sps->bit_depth > 8;
sps->log2_max_poc_lsb = get_ue_golomb_long(gb) + 4;
if (sps->log2_max_poc_lsb > 16) {
av_log(s->avctx, AV_LOG_ERROR, "log2_max_pic_order_cnt_lsb_minus4 out range: %d\n",
sps->log2_max_poc_lsb - 4);
ret = AVERROR_INVALIDDATA;
goto err;
}
sublayer_ordering_info = get_bits1(gb);
start = sublayer_ordering_info ? 0 : sps->max_sub_layers - 1;
for (i = start; i < sps->max_sub_layers; i++) {
sps->temporal_layer[i].max_dec_pic_buffering = get_ue_golomb_long(gb) + 1;
sps->temporal_layer[i].num_reorder_pics = get_ue_golomb_long(gb);
sps->temporal_layer[i].max_latency_increase = get_ue_golomb_long(gb) - 1;
if (sps->temporal_layer[i].max_dec_pic_buffering > MAX_DPB_SIZE) {
av_log(s->avctx, AV_LOG_ERROR, "sps_max_dec_pic_buffering_minus1 out of range: %d\n",
sps->temporal_layer[i].max_dec_pic_buffering - 1);
ret = AVERROR_INVALIDDATA;
goto err;
}
if (sps->temporal_layer[i].num_reorder_pics > sps->temporal_layer[i].max_dec_pic_buffering - 1) {
av_log(s->avctx, AV_LOG_WARNING, "sps_max_num_reorder_pics out of range: %d\n",
sps->temporal_layer[i].num_reorder_pics);
if (s->avctx->err_recognition & AV_EF_EXPLODE ||
sps->temporal_layer[i].num_reorder_pics > MAX_DPB_SIZE - 1) {
ret = AVERROR_INVALIDDATA;
goto err;
}
sps->temporal_layer[i].max_dec_pic_buffering = sps->temporal_layer[i].num_reorder_pics + 1;
}
}
if (!sublayer_ordering_info) {
for (i = 0; i < start; i++) {
sps->temporal_layer[i].max_dec_pic_buffering = sps->temporal_layer[start].max_dec_pic_buffering;
sps->temporal_layer[i].num_reorder_pics = sps->temporal_layer[start].num_reorder_pics;
sps->temporal_layer[i].max_latency_increase = sps->temporal_layer[start].max_latency_increase;
}
}
sps->log2_min_cb_size = get_ue_golomb_long(gb) + 3;
sps->log2_diff_max_min_coding_block_size = get_ue_golomb_long(gb);
sps->log2_min_tb_size = get_ue_golomb_long(gb) + 2;
log2_diff_max_min_transform_block_size = get_ue_golomb_long(gb);
sps->log2_max_trafo_size = log2_diff_max_min_transform_block_size +
sps->log2_min_tb_size;
if (sps->log2_min_cb_size < 3 || sps->log2_min_cb_size > 30) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid value %d for log2_min_cb_size", sps->log2_min_cb_size);
ret = AVERROR_INVALIDDATA;
goto err;
}
if (sps->log2_diff_max_min_coding_block_size > 30) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid value %d for log2_diff_max_min_coding_block_size", sps->log2_diff_max_min_coding_block_size);
ret = AVERROR_INVALIDDATA;
goto err;
}
if (sps->log2_min_tb_size >= sps->log2_min_cb_size || sps->log2_min_tb_size < 2) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid value for log2_min_tb_size");
ret = AVERROR_INVALIDDATA;
goto err;
}
if (log2_diff_max_min_transform_block_size < 0 || log2_diff_max_min_transform_block_size > 30) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid value %d for log2_diff_max_min_transform_block_size", log2_diff_max_min_transform_block_size);
ret = AVERROR_INVALIDDATA;
goto err;
}
sps->max_transform_hierarchy_depth_inter = get_ue_golomb_long(gb);
sps->max_transform_hierarchy_depth_intra = get_ue_golomb_long(gb);
sps->scaling_list_enable_flag = get_bits1(gb);
if (sps->scaling_list_enable_flag) {
set_default_scaling_list_data(&sps->scaling_list);
if (get_bits1(gb)) {
ret = scaling_list_data(s, &sps->scaling_list, sps);
if (ret < 0)
goto err;
}
}
sps->amp_enabled_flag = get_bits1(gb);
sps->sao_enabled = get_bits1(gb);
sps->pcm_enabled_flag = get_bits1(gb);
if (sps->pcm_enabled_flag) {
sps->pcm.bit_depth = get_bits(gb, 4) + 1;
sps->pcm.bit_depth_chroma = get_bits(gb, 4) + 1;
sps->pcm.log2_min_pcm_cb_size = get_ue_golomb_long(gb) + 3;
sps->pcm.log2_max_pcm_cb_size = sps->pcm.log2_min_pcm_cb_size +
get_ue_golomb_long(gb);
if (sps->pcm.bit_depth > sps->bit_depth) {
av_log(s->avctx, AV_LOG_ERROR,
"PCM bit depth (%d) is greater than normal bit depth (%d)\n",
sps->pcm.bit_depth, sps->bit_depth);
ret = AVERROR_INVALIDDATA;
goto err;
}
sps->pcm.loop_filter_disable_flag = get_bits1(gb);
}
sps->nb_st_rps = get_ue_golomb_long(gb);
if (sps->nb_st_rps > MAX_SHORT_TERM_RPS_COUNT) {
av_log(s->avctx, AV_LOG_ERROR, "Too many short term RPS: %d.\n",
sps->nb_st_rps);
ret = AVERROR_INVALIDDATA;
goto err;
}
for (i = 0; i < sps->nb_st_rps; i++) {
if ((ret = ff_hevc_decode_short_term_rps(s, &sps->st_rps[i],
sps, 0)) < 0)
goto err;
}
sps->long_term_ref_pics_present_flag = get_bits1(gb);
if (sps->long_term_ref_pics_present_flag) {
sps->num_long_term_ref_pics_sps = get_ue_golomb_long(gb);
if (sps->num_long_term_ref_pics_sps > 31U) {
av_log(s->avctx, AV_LOG_ERROR, "num_long_term_ref_pics_sps %d is out of range.\n",
sps->num_long_term_ref_pics_sps);
goto err;
}
for (i = 0; i < sps->num_long_term_ref_pics_sps; i++) {
sps->lt_ref_pic_poc_lsb_sps[i] = get_bits(gb, sps->log2_max_poc_lsb);
sps->used_by_curr_pic_lt_sps_flag[i] = get_bits1(gb);
}
}
sps->sps_temporal_mvp_enabled_flag = get_bits1(gb);
sps->sps_strong_intra_smoothing_enable_flag = get_bits1(gb);
sps->vui.sar = (AVRational){0, 1};
vui_present = get_bits1(gb);
if (vui_present)
decode_vui(s, sps);
if (get_bits1(gb)) { // sps_extension_flag
int sps_extension_flag[1];
for (i = 0; i < 1; i++)
sps_extension_flag[i] = get_bits1(gb);
skip_bits(gb, 7); //sps_extension_7bits = get_bits(gb, 7);
if (sps_extension_flag[0]) {
int extended_precision_processing_flag;
int high_precision_offsets_enabled_flag;
int cabac_bypass_alignment_enabled_flag;
sps->transform_skip_rotation_enabled_flag = get_bits1(gb);
sps->transform_skip_context_enabled_flag = get_bits1(gb);
sps->implicit_rdpcm_enabled_flag = get_bits1(gb);
sps->explicit_rdpcm_enabled_flag = get_bits1(gb);
extended_precision_processing_flag = get_bits1(gb);
if (extended_precision_processing_flag)
av_log(s->avctx, AV_LOG_WARNING,
"extended_precision_processing_flag not yet implemented\n");
sps->intra_smoothing_disabled_flag = get_bits1(gb);
high_precision_offsets_enabled_flag = get_bits1(gb);
if (high_precision_offsets_enabled_flag)
av_log(s->avctx, AV_LOG_WARNING,
"high_precision_offsets_enabled_flag not yet implemented\n");
sps->persistent_rice_adaptation_enabled_flag = get_bits1(gb);
cabac_bypass_alignment_enabled_flag = get_bits1(gb);
if (cabac_bypass_alignment_enabled_flag)
av_log(s->avctx, AV_LOG_WARNING,
"cabac_bypass_alignment_enabled_flag not yet implemented\n");
}
}
if (s->apply_defdispwin) {
sps->output_window.left_offset += sps->vui.def_disp_win.left_offset;
sps->output_window.right_offset += sps->vui.def_disp_win.right_offset;
sps->output_window.top_offset += sps->vui.def_disp_win.top_offset;
sps->output_window.bottom_offset += sps->vui.def_disp_win.bottom_offset;
}
if (sps->output_window.left_offset & (0x1F >> (sps->pixel_shift)) &&
!(s->avctx->flags & CODEC_FLAG_UNALIGNED)) {
sps->output_window.left_offset &= ~(0x1F >> (sps->pixel_shift));
av_log(s->avctx, AV_LOG_WARNING, "Reducing left output window to %d "
"chroma samples to preserve alignment.\n",
sps->output_window.left_offset);
}
sps->output_width = sps->width -
(sps->output_window.left_offset + sps->output_window.right_offset);
sps->output_height = sps->height -
(sps->output_window.top_offset + sps->output_window.bottom_offset);
if (sps->width <= sps->output_window.left_offset + (int64_t)sps->output_window.right_offset ||
sps->height <= sps->output_window.top_offset + (int64_t)sps->output_window.bottom_offset) {
av_log(s->avctx, AV_LOG_WARNING, "Invalid visible frame dimensions: %dx%d.\n",
sps->output_width, sps->output_height);
if (s->avctx->err_recognition & AV_EF_EXPLODE) {
ret = AVERROR_INVALIDDATA;
goto err;
}
av_log(s->avctx, AV_LOG_WARNING,
"Displaying the whole video surface.\n");
memset(&sps->pic_conf_win, 0, sizeof(sps->pic_conf_win));
memset(&sps->output_window, 0, sizeof(sps->output_window));
sps->output_width = sps->width;
sps->output_height = sps->height;
}
// Inferred parameters
sps->log2_ctb_size = sps->log2_min_cb_size +
sps->log2_diff_max_min_coding_block_size;
sps->log2_min_pu_size = sps->log2_min_cb_size - 1;
sps->ctb_width = (sps->width + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;
sps->ctb_height = (sps->height + (1 << sps->log2_ctb_size) - 1) >> sps->log2_ctb_size;
sps->ctb_size = sps->ctb_width * sps->ctb_height;
sps->min_cb_width = sps->width >> sps->log2_min_cb_size;
sps->min_cb_height = sps->height >> sps->log2_min_cb_size;
sps->min_tb_width = sps->width >> sps->log2_min_tb_size;
sps->min_tb_height = sps->height >> sps->log2_min_tb_size;
sps->min_pu_width = sps->width >> sps->log2_min_pu_size;
sps->min_pu_height = sps->height >> sps->log2_min_pu_size;
sps->tb_mask = (1 << (sps->log2_ctb_size - sps->log2_min_tb_size)) - 1;
sps->qp_bd_offset = 6 * (sps->bit_depth - 8);
if (av_mod_uintp2(sps->width, sps->log2_min_cb_size) ||
av_mod_uintp2(sps->height, sps->log2_min_cb_size)) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid coded frame dimensions.\n");
goto err;
}
if (sps->log2_ctb_size > MAX_LOG2_CTB_SIZE) {
av_log(s->avctx, AV_LOG_ERROR, "CTB size out of range: 2^%d\n", sps->log2_ctb_size);
goto err;
}
if (sps->log2_ctb_size < 4) {
av_log(s->avctx,
AV_LOG_ERROR,
"log2_ctb_size %d differs from the bounds of any known profile\n",
sps->log2_ctb_size);
avpriv_request_sample(s->avctx, "log2_ctb_size %d", sps->log2_ctb_size);
goto err;
}
if (sps->max_transform_hierarchy_depth_inter > sps->log2_ctb_size - sps->log2_min_tb_size) {
av_log(s->avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_inter out of range: %d\n",
sps->max_transform_hierarchy_depth_inter);
goto err;
}
if (sps->max_transform_hierarchy_depth_intra > sps->log2_ctb_size - sps->log2_min_tb_size) {
av_log(s->avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_intra out of range: %d\n",
sps->max_transform_hierarchy_depth_intra);
goto err;
}
if (sps->log2_max_trafo_size > FFMIN(sps->log2_ctb_size, 5)) {
av_log(s->avctx, AV_LOG_ERROR,
"max transform block size out of range: %d\n",
sps->log2_max_trafo_size);
goto err;
}
if (get_bits_left(gb) < 0) {
av_log(s->avctx, AV_LOG_ERROR,
"Overread SPS by %d bits\n", -get_bits_left(gb));
goto err;
}
if (s->avctx->debug & FF_DEBUG_BITSTREAM) {
av_log(s->avctx, AV_LOG_DEBUG,
"Parsed SPS: id %d; coded wxh: %dx%d; "
"cropped wxh: %dx%d; pix_fmt: %s.\n",
sps_id, sps->width, sps->height,
sps->output_width, sps->output_height,
av_get_pix_fmt_name(sps->pix_fmt));
}
/* check if this is a repeat of an already parsed SPS, then keep the
* original one.
* otherwise drop all PPSes that depend on it */
if (s->sps_list[sps_id] &&
!memcmp(s->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
av_buffer_unref(&sps_buf);
} else {
remove_sps(s, sps_id);
s->sps_list[sps_id] = sps_buf;
}
return 0;
err:
av_buffer_unref(&sps_buf);
return ret;
}
static void hevc_pps_free(void *opaque, uint8_t *data)
{
HEVCPPS *pps = (HEVCPPS*)data;
av_freep(&pps->column_width);
av_freep(&pps->row_height);
av_freep(&pps->col_bd);
av_freep(&pps->row_bd);
av_freep(&pps->col_idxX);
av_freep(&pps->ctb_addr_rs_to_ts);
av_freep(&pps->ctb_addr_ts_to_rs);
av_freep(&pps->tile_pos_rs);
av_freep(&pps->tile_id);
av_freep(&pps->min_tb_addr_zs_tab);
av_freep(&pps);
}
static int pps_range_extensions(HEVCContext *s, HEVCPPS *pps, HEVCSPS *sps) {
GetBitContext *gb = &s->HEVClc->gb;
int i;
if (pps->transform_skip_enabled_flag) {
pps->log2_max_transform_skip_block_size = get_ue_golomb_long(gb) + 2;
}
pps->cross_component_prediction_enabled_flag = get_bits1(gb);
pps->chroma_qp_offset_list_enabled_flag = get_bits1(gb);
if (pps->chroma_qp_offset_list_enabled_flag) {
pps->diff_cu_chroma_qp_offset_depth = get_ue_golomb_long(gb);
pps->chroma_qp_offset_list_len_minus1 = get_ue_golomb_long(gb);
if (pps->chroma_qp_offset_list_len_minus1 && pps->chroma_qp_offset_list_len_minus1 >= 5) {
av_log(s->avctx, AV_LOG_ERROR,
"chroma_qp_offset_list_len_minus1 shall be in the range [0, 5].\n");
return AVERROR_INVALIDDATA;
}
for (i = 0; i <= pps->chroma_qp_offset_list_len_minus1; i++) {
pps->cb_qp_offset_list[i] = get_se_golomb_long(gb);
if (pps->cb_qp_offset_list[i]) {
av_log(s->avctx, AV_LOG_WARNING,
"cb_qp_offset_list not tested yet.\n");
}
pps->cr_qp_offset_list[i] = get_se_golomb_long(gb);
if (pps->cr_qp_offset_list[i]) {
av_log(s->avctx, AV_LOG_WARNING,
"cb_qp_offset_list not tested yet.\n");
}
}
}
pps->log2_sao_offset_scale_luma = get_ue_golomb_long(gb);
pps->log2_sao_offset_scale_chroma = get_ue_golomb_long(gb);
return(0);
}
int ff_hevc_decode_nal_pps(HEVCContext *s)
{
GetBitContext *gb = &s->HEVClc->gb;
HEVCSPS *sps = NULL;
int pic_area_in_ctbs;
int log2_diff_ctb_min_tb_size;
int i, j, x, y, ctb_addr_rs, tile_id;
int ret = 0;
unsigned int pps_id = 0;
AVBufferRef *pps_buf;
HEVCPPS *pps = av_mallocz(sizeof(*pps));
if (!pps)
return AVERROR(ENOMEM);
pps_buf = av_buffer_create((uint8_t *)pps, sizeof(*pps),
hevc_pps_free, NULL, 0);
if (!pps_buf) {
av_freep(&pps);
return AVERROR(ENOMEM);
}
av_log(s->avctx, AV_LOG_DEBUG, "Decoding PPS\n");
// Default values
pps->loop_filter_across_tiles_enabled_flag = 1;
pps->num_tile_columns = 1;
pps->num_tile_rows = 1;
pps->uniform_spacing_flag = 1;
pps->disable_dbf = 0;
pps->beta_offset = 0;
pps->tc_offset = 0;
pps->log2_max_transform_skip_block_size = 2;
// Coded parameters
pps_id = get_ue_golomb_long(gb);
if (pps_id >= MAX_PPS_COUNT) {
av_log(s->avctx, AV_LOG_ERROR, "PPS id out of range: %d\n", pps_id);
ret = AVERROR_INVALIDDATA;
goto err;
}
pps->sps_id = get_ue_golomb_long(gb);
if (pps->sps_id >= MAX_SPS_COUNT) {
av_log(s->avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id);
ret = AVERROR_INVALIDDATA;
goto err;
}
if (!s->sps_list[pps->sps_id]) {
av_log(s->avctx, AV_LOG_ERROR, "SPS %u does not exist.\n", pps->sps_id);
ret = AVERROR_INVALIDDATA;
goto err;
}
sps = (HEVCSPS *)s->sps_list[pps->sps_id]->data;
pps->dependent_slice_segments_enabled_flag = get_bits1(gb);
pps->output_flag_present_flag = get_bits1(gb);
pps->num_extra_slice_header_bits = get_bits(gb, 3);
pps->sign_data_hiding_flag = get_bits1(gb);
pps->cabac_init_present_flag = get_bits1(gb);
pps->num_ref_idx_l0_default_active = get_ue_golomb_long(gb) + 1;
pps->num_ref_idx_l1_default_active = get_ue_golomb_long(gb) + 1;
pps->pic_init_qp_minus26 = get_se_golomb(gb);
pps->constrained_intra_pred_flag = get_bits1(gb);
pps->transform_skip_enabled_flag = get_bits1(gb);
pps->cu_qp_delta_enabled_flag = get_bits1(gb);
pps->diff_cu_qp_delta_depth = 0;
if (pps->cu_qp_delta_enabled_flag)
pps->diff_cu_qp_delta_depth = get_ue_golomb_long(gb);
if (pps->diff_cu_qp_delta_depth < 0 ||
pps->diff_cu_qp_delta_depth > sps->log2_diff_max_min_coding_block_size) {
av_log(s->avctx, AV_LOG_ERROR, "diff_cu_qp_delta_depth %d is invalid\n",
pps->diff_cu_qp_delta_depth);
ret = AVERROR_INVALIDDATA;
goto err;
}
pps->cb_qp_offset = get_se_golomb(gb);
if (pps->cb_qp_offset < -12 || pps->cb_qp_offset > 12) {
av_log(s->avctx, AV_LOG_ERROR, "pps_cb_qp_offset out of range: %d\n",
pps->cb_qp_offset);
ret = AVERROR_INVALIDDATA;
goto err;
}
pps->cr_qp_offset = get_se_golomb(gb);
if (pps->cr_qp_offset < -12 || pps->cr_qp_offset > 12) {
av_log(s->avctx, AV_LOG_ERROR, "pps_cr_qp_offset out of range: %d\n",
pps->cr_qp_offset);
ret = AVERROR_INVALIDDATA;
goto err;
}
pps->pic_slice_level_chroma_qp_offsets_present_flag = get_bits1(gb);
pps->weighted_pred_flag = get_bits1(gb);
pps->weighted_bipred_flag = get_bits1(gb);
pps->transquant_bypass_enable_flag = get_bits1(gb);
pps->tiles_enabled_flag = get_bits1(gb);
pps->entropy_coding_sync_enabled_flag = get_bits1(gb);
if (pps->tiles_enabled_flag) {
pps->num_tile_columns = get_ue_golomb_long(gb) + 1;
pps->num_tile_rows = get_ue_golomb_long(gb) + 1;
if (pps->num_tile_columns == 0 ||
pps->num_tile_columns >= sps->width) {
av_log(s->avctx, AV_LOG_ERROR, "num_tile_columns_minus1 out of range: %d\n",
pps->num_tile_columns - 1);
ret = AVERROR_INVALIDDATA;
goto err;
}
if (pps->num_tile_rows == 0 ||
pps->num_tile_rows >= sps->height) {
av_log(s->avctx, AV_LOG_ERROR, "num_tile_rows_minus1 out of range: %d\n",
pps->num_tile_rows - 1);
ret = AVERROR_INVALIDDATA;
goto err;
}
pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));
pps->row_height = av_malloc_array(pps->num_tile_rows, sizeof(*pps->row_height));
if (!pps->column_width || !pps->row_height) {
ret = AVERROR(ENOMEM);
goto err;
}
pps->uniform_spacing_flag = get_bits1(gb);
if (!pps->uniform_spacing_flag) {
uint64_t sum = 0;
for (i = 0; i < pps->num_tile_columns - 1; i++) {
pps->column_width[i] = get_ue_golomb_long(gb) + 1;
sum += pps->column_width[i];
}
if (sum >= sps->ctb_width) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid tile widths.\n");
ret = AVERROR_INVALIDDATA;
goto err;
}
pps->column_width[pps->num_tile_columns - 1] = sps->ctb_width - sum;
sum = 0;
for (i = 0; i < pps->num_tile_rows - 1; i++) {
pps->row_height[i] = get_ue_golomb_long(gb) + 1;
sum += pps->row_height[i];
}
if (sum >= sps->ctb_height) {
av_log(s->avctx, AV_LOG_ERROR, "Invalid tile heights.\n");
ret = AVERROR_INVALIDDATA;
goto err;
}
pps->row_height[pps->num_tile_rows - 1] = sps->ctb_height - sum;
}
pps->loop_filter_across_tiles_enabled_flag = get_bits1(gb);
}
pps->seq_loop_filter_across_slices_enabled_flag = get_bits1(gb);
pps->deblocking_filter_control_present_flag = get_bits1(gb);
if (pps->deblocking_filter_control_present_flag) {
pps->deblocking_filter_override_enabled_flag = get_bits1(gb);
pps->disable_dbf = get_bits1(gb);
if (!pps->disable_dbf) {
pps->beta_offset = get_se_golomb(gb) * 2;
pps->tc_offset = get_se_golomb(gb) * 2;
if (pps->beta_offset/2 < -6 || pps->beta_offset/2 > 6) {
av_log(s->avctx, AV_LOG_ERROR, "pps_beta_offset_div2 out of range: %d\n",
pps->beta_offset/2);
ret = AVERROR_INVALIDDATA;
goto err;
}
if (pps->tc_offset/2 < -6 || pps->tc_offset/2 > 6) {
av_log(s->avctx, AV_LOG_ERROR, "pps_tc_offset_div2 out of range: %d\n",
pps->tc_offset/2);
ret = AVERROR_INVALIDDATA;
goto err;
}
}
}
pps->scaling_list_data_present_flag = get_bits1(gb);
if (pps->scaling_list_data_present_flag) {
set_default_scaling_list_data(&pps->scaling_list);
ret = scaling_list_data(s, &pps->scaling_list, sps);
if (ret < 0)
goto err;
}
pps->lists_modification_present_flag = get_bits1(gb);
pps->log2_parallel_merge_level = get_ue_golomb_long(gb) + 2;
if (pps->log2_parallel_merge_level > sps->log2_ctb_size) {
av_log(s->avctx, AV_LOG_ERROR, "log2_parallel_merge_level_minus2 out of range: %d\n",
pps->log2_parallel_merge_level - 2);
ret = AVERROR_INVALIDDATA;
goto err;
}
pps->slice_header_extension_present_flag = get_bits1(gb);
if (get_bits1(gb)) { // pps_extension_present_flag
int pps_range_extensions_flag = get_bits1(gb);
/* int pps_extension_7bits = */ get_bits(gb, 7);
if (sps->ptl.general_ptl.profile_idc == FF_PROFILE_HEVC_REXT && pps_range_extensions_flag) {
if ((ret = pps_range_extensions(s, pps, sps)) < 0)
goto err;
}
}
// Inferred parameters
pps->col_bd = av_malloc_array(pps->num_tile_columns + 1, sizeof(*pps->col_bd));
pps->row_bd = av_malloc_array(pps->num_tile_rows + 1, sizeof(*pps->row_bd));
pps->col_idxX = av_malloc_array(sps->ctb_width, sizeof(*pps->col_idxX));
if (!pps->col_bd || !pps->row_bd || !pps->col_idxX) {
ret = AVERROR(ENOMEM);
goto err;
}
if (pps->uniform_spacing_flag) {
if (!pps->column_width) {
pps->column_width = av_malloc_array(pps->num_tile_columns, sizeof(*pps->column_width));
pps->row_height = av_malloc_array(pps->num_tile_rows, sizeof(*pps->row_height));
}
if (!pps->column_width || !pps->row_height) {
ret = AVERROR(ENOMEM);
goto err;
}
for (i = 0; i < pps->num_tile_columns; i++) {
pps->column_width[i] = ((i + 1) * sps->ctb_width) / pps->num_tile_columns -
(i * sps->ctb_width) / pps->num_tile_columns;
}
for (i = 0; i < pps->num_tile_rows; i++) {
pps->row_height[i] = ((i + 1) * sps->ctb_height) / pps->num_tile_rows -
(i * sps->ctb_height) / pps->num_tile_rows;
}
}
pps->col_bd[0] = 0;
for (i = 0; i < pps->num_tile_columns; i++)
pps->col_bd[i + 1] = pps->col_bd[i] + pps->column_width[i];
pps->row_bd[0] = 0;
for (i = 0; i < pps->num_tile_rows; i++)
pps->row_bd[i + 1] = pps->row_bd[i] + pps->row_height[i];
for (i = 0, j = 0; i < sps->ctb_width; i++) {
if (i > pps->col_bd[j])
j++;
pps->col_idxX[i] = j;
}
/**
* 6.5
*/
pic_area_in_ctbs = sps->ctb_width * sps->ctb_height;
pps->ctb_addr_rs_to_ts = av_malloc_array(pic_area_in_ctbs, sizeof(*pps->ctb_addr_rs_to_ts));
pps->ctb_addr_ts_to_rs = av_malloc_array(pic_area_in_ctbs, sizeof(*pps->ctb_addr_ts_to_rs));
pps->tile_id = av_malloc_array(pic_area_in_ctbs, sizeof(*pps->tile_id));
pps->min_tb_addr_zs_tab = av_malloc_array((sps->tb_mask+2) * (sps->tb_mask+2), sizeof(*pps->min_tb_addr_zs_tab));
if (!pps->ctb_addr_rs_to_ts || !pps->ctb_addr_ts_to_rs ||
!pps->tile_id || !pps->min_tb_addr_zs_tab) {
ret = AVERROR(ENOMEM);
goto err;
}
for (ctb_addr_rs = 0; ctb_addr_rs < pic_area_in_ctbs; ctb_addr_rs++) {
int tb_x = ctb_addr_rs % sps->ctb_width;
int tb_y = ctb_addr_rs / sps->ctb_width;
int tile_x = 0;
int tile_y = 0;
int val = 0;
for (i = 0; i < pps->num_tile_columns; i++) {
if (tb_x < pps->col_bd[i + 1]) {
tile_x = i;
break;
}
}
for (i = 0; i < pps->num_tile_rows; i++) {
if (tb_y < pps->row_bd[i + 1]) {
tile_y = i;
break;
}
}
for (i = 0; i < tile_x; i++)
val += pps->row_height[tile_y] * pps->column_width[i];
for (i = 0; i < tile_y; i++)
val += sps->ctb_width * pps->row_height[i];
val += (tb_y - pps->row_bd[tile_y]) * pps->column_width[tile_x] +
tb_x - pps->col_bd[tile_x];
pps->ctb_addr_rs_to_ts[ctb_addr_rs] = val;
pps->ctb_addr_ts_to_rs[val] = ctb_addr_rs;
}
for (j = 0, tile_id = 0; j < pps->num_tile_rows; j++)
for (i = 0; i < pps->num_tile_columns; i++, tile_id++)
for (y = pps->row_bd[j]; y < pps->row_bd[j + 1]; y++)
for (x = pps->col_bd[i]; x < pps->col_bd[i + 1]; x++)
pps->tile_id[pps->ctb_addr_rs_to_ts[y * sps->ctb_width + x]] = tile_id;
pps->tile_pos_rs = av_malloc_array(tile_id, sizeof(*pps->tile_pos_rs));
if (!pps->tile_pos_rs) {
ret = AVERROR(ENOMEM);
goto err;
}
for (j = 0; j < pps->num_tile_rows; j++)
for (i = 0; i < pps->num_tile_columns; i++)
pps->tile_pos_rs[j * pps->num_tile_columns + i] = pps->row_bd[j] * sps->ctb_width + pps->col_bd[i];
log2_diff_ctb_min_tb_size = sps->log2_ctb_size - sps->log2_min_tb_size;
pps->min_tb_addr_zs = &pps->min_tb_addr_zs_tab[1*(sps->tb_mask+2)+1];
for (y = 0; y < sps->tb_mask+2; y++) {
pps->min_tb_addr_zs_tab[y*(sps->tb_mask+2)] = -1;
pps->min_tb_addr_zs_tab[y] = -1;
}
for (y = 0; y < sps->tb_mask+1; y++) {
for (x = 0; x < sps->tb_mask+1; x++) {
int tb_x = x >> log2_diff_ctb_min_tb_size;
int tb_y = y >> log2_diff_ctb_min_tb_size;
int ctb_addr_rs = sps->ctb_width * tb_y + tb_x;
int val = pps->ctb_addr_rs_to_ts[ctb_addr_rs] <<
(log2_diff_ctb_min_tb_size * 2);
for (i = 0; i < log2_diff_ctb_min_tb_size; i++) {
int m = 1 << i;
val += (m & x ? m * m : 0) + (m & y ? 2 * m * m : 0);
}
pps->min_tb_addr_zs[y * (sps->tb_mask+2) + x] = val;
}
}
if (get_bits_left(gb) < 0) {
av_log(s->avctx, AV_LOG_ERROR,
"Overread PPS by %d bits\n", -get_bits_left(gb));
goto err;
}
remove_pps(s, pps_id);
s->pps_list[pps_id] = pps_buf;
return 0;
err:
av_buffer_unref(&pps_buf);
return ret;
}
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