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FFmpeg/libavcodec/hevc_ps.c
Anton Khirnov b9f76d19d8 hevc_ps: make sure failing to decode an SPS always returns an error 
Some of the goto err clauses do not set the error code. It seems better
to fall back on INVALIDDATA instead of adding it everywhere explicitly.
2015-07-13 07:49:03 +02:00

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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(HEVCParamSets *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(HEVCParamSets *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);
av_assert0(!(s->sps_list[id] && s->sps == (HEVCSPS*)s->sps_list[id]->data));
}
av_buffer_unref(&s->sps_list[id]);
}
static void remove_vps(HEVCParamSets *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(GetBitContext *gb, AVCodecContext *avctx,
ShortTermRPS *rps, const HEVCSPS *sps, int is_slice_header)
{
uint8_t rps_predict = 0;
int delta_poc;
int k0 = 0;
int k1 = 0;
int k = 0;
int i;
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(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(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(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(GetBitContext *gb, AVCodecContext *avctx,
PTLCommon *ptl)
{
int i;
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(avctx, AV_LOG_DEBUG, "Main profile bitstream\n");
else if (ptl->profile_idc == FF_PROFILE_HEVC_MAIN_10)
av_log(avctx, AV_LOG_DEBUG, "Main 10 profile bitstream\n");
else if (ptl->profile_idc == FF_PROFILE_HEVC_MAIN_STILL_PICTURE)
av_log(avctx, AV_LOG_DEBUG, "Main Still Picture profile bitstream\n");
else if (ptl->profile_idc == FF_PROFILE_HEVC_REXT)
av_log(avctx, AV_LOG_DEBUG, "Range Extension profile bitstream\n");
else
av_log(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(GetBitContext *gb, AVCodecContext *avctx,
PTL *ptl, int max_num_sub_layers)
{
int i;
if (decode_profile_tier_level(gb, avctx, &ptl->general_ptl) < 0 ||
get_bits_left(gb) < 8 + 8*2) {
av_log(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(gb, avctx, &ptl->sub_layer_ptl[i]) < 0) {
av_log(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(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(GetBitContext *gb, unsigned int nb_cpb,
int subpic_params_present)
{
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(GetBitContext *gb, int common_inf_present,
int max_sublayers)
{
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(NULL, AV_LOG_ERROR, "nb_cpb %d invalid\n", nb_cpb);
return AVERROR_INVALIDDATA;
}
}
if (nal_params_present)
decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);
if (vcl_params_present)
decode_sublayer_hrd(gb, nb_cpb, subpic_params_present);
}
return 0;
}
int ff_hevc_decode_nal_vps(GetBitContext *gb, AVCodecContext *avctx,
HEVCParamSets *ps)
{
int i,j;
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(avctx, AV_LOG_DEBUG, "Decoding VPS\n");
vps_id = get_bits(gb, 4);
if (vps_id >= MAX_VPS_COUNT) {
av_log(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(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(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(avctx, AV_LOG_ERROR, "vps_max_sub_layers out of range: %d\n",
vps->vps_max_sub_layers);
goto err;
}
if (parse_ptl(gb, avctx, &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(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(avctx, AV_LOG_WARNING, "vps_max_num_reorder_pics out of range: %d\n",
vps->vps_num_reorder_pics[i]);
if (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 < 1 || vps->vps_num_layer_sets > 1024 ||
(vps->vps_num_layer_sets - 1LL) * (vps->vps_max_layer_id + 1LL) > get_bits_left(gb)) {
av_log(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);
if (vps->vps_num_hrd_parameters > (unsigned)vps->vps_num_layer_sets) {
av_log(avctx, AV_LOG_ERROR,
"vps_num_hrd_parameters %d is invalid\n", vps->vps_num_hrd_parameters);
goto err;
}
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(gb, common_inf_present, vps->vps_max_sub_layers);
}
}
get_bits1(gb); /* vps_extension_flag */
if (get_bits_left(gb) < 0) {
av_log(avctx, AV_LOG_ERROR,
"Overread VPS by %d bits\n", -get_bits_left(gb));
if (ps->vps_list[vps_id])
goto err;
}
if (ps->vps_list[vps_id] &&
!memcmp(ps->vps_list[vps_id]->data, vps_buf->data, vps_buf->size)) {
av_buffer_unref(&vps_buf);
} else {
remove_vps(ps, vps_id);
ps->vps_list[vps_id] = vps_buf;
}
return 0;
err:
av_buffer_unref(&vps_buf);
return AVERROR_INVALIDDATA;
}
static void decode_vui(GetBitContext *gb, AVCodecContext *avctx,
int apply_defdispwin, HEVCSPS *sps)
{
VUI *vui = &sps->vui;
GetBitContext backup;
int sar_present, alt = 0;
av_log(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(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(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 (apply_defdispwin &&
avctx->flags2 & CODEC_FLAG2_IGNORE_CROP) {
av_log(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(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(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(gb, 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(GetBitContext *gb, AVCodecContext *avctx, ScalingList *sl, HEVCSPS *sps)
{
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(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_parse_sps(HEVCSPS *sps, GetBitContext *gb, unsigned int *sps_id,
int apply_defdispwin, AVBufferRef **vps_list, AVCodecContext *avctx)
{
const AVPixFmtDescriptor *desc;
int ret = 0;
int log2_diff_max_min_transform_block_size;
int bit_depth_chroma, start, vui_present, sublayer_ordering_info;
int i;
// Coded parameters
sps->vps_id = get_bits(gb, 4);
if (sps->vps_id >= MAX_VPS_COUNT) {
av_log(avctx, AV_LOG_ERROR, "VPS id out of range: %d\n", sps->vps_id);
return AVERROR_INVALIDDATA;
}
if (vps_list && !vps_list[sps->vps_id]) {
av_log(avctx, AV_LOG_ERROR, "VPS %d does not exist\n",
sps->vps_id);
return AVERROR_INVALIDDATA;
}
sps->max_sub_layers = get_bits(gb, 3) + 1;
if (sps->max_sub_layers > MAX_SUB_LAYERS) {
av_log(avctx, AV_LOG_ERROR, "sps_max_sub_layers out of range: %d\n",
sps->max_sub_layers);
return AVERROR_INVALIDDATA;
}
skip_bits1(gb); // temporal_id_nesting_flag
if ((ret = parse_ptl(gb, avctx, &sps->ptl, sps->max_sub_layers)) < 0)
return ret;
*sps_id = get_ue_golomb_long(gb);
if (*sps_id >= MAX_SPS_COUNT) {
av_log(avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", *sps_id);
return AVERROR_INVALIDDATA;
}
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, avctx)) < 0)
return ret;
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 (avctx->flags2 & CODEC_FLAG2_IGNORE_CROP) {
av_log(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(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);
return AVERROR_INVALIDDATA;
}
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(avctx, AV_LOG_ERROR,
"4:2:0, 4:2:2, 4:4:4 supports are currently specified for 8, 10 and 12 bits.\n");
return AVERROR_INVALIDDATA;
}
desc = av_pix_fmt_desc_get(sps->pix_fmt);
if (!desc) {
return AVERROR(EINVAL);
}
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(avctx, AV_LOG_ERROR, "log2_max_pic_order_cnt_lsb_minus4 out range: %d\n",
sps->log2_max_poc_lsb - 4);
return AVERROR_INVALIDDATA;
}
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(avctx, AV_LOG_ERROR, "sps_max_dec_pic_buffering_minus1 out of range: %d\n",
sps->temporal_layer[i].max_dec_pic_buffering - 1);
return AVERROR_INVALIDDATA;
}
if (sps->temporal_layer[i].num_reorder_pics > sps->temporal_layer[i].max_dec_pic_buffering - 1) {
av_log(avctx, AV_LOG_WARNING, "sps_max_num_reorder_pics out of range: %d\n",
sps->temporal_layer[i].num_reorder_pics);
if (avctx->err_recognition & AV_EF_EXPLODE ||
sps->temporal_layer[i].num_reorder_pics > MAX_DPB_SIZE - 1) {
return AVERROR_INVALIDDATA;
}
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(avctx, AV_LOG_ERROR, "Invalid value %d for log2_min_cb_size", sps->log2_min_cb_size);
return AVERROR_INVALIDDATA;
}
if (sps->log2_diff_max_min_coding_block_size > 30) {
av_log(avctx, AV_LOG_ERROR, "Invalid value %d for log2_diff_max_min_coding_block_size", sps->log2_diff_max_min_coding_block_size);
return AVERROR_INVALIDDATA;
}
if (sps->log2_min_tb_size >= sps->log2_min_cb_size || sps->log2_min_tb_size < 2) {
av_log(avctx, AV_LOG_ERROR, "Invalid value for log2_min_tb_size");
return AVERROR_INVALIDDATA;
}
if (log2_diff_max_min_transform_block_size < 0 || log2_diff_max_min_transform_block_size > 30) {
av_log(avctx, AV_LOG_ERROR, "Invalid value %d for log2_diff_max_min_transform_block_size", log2_diff_max_min_transform_block_size);
return AVERROR_INVALIDDATA;
}
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(gb, avctx, &sps->scaling_list, sps);
if (ret < 0)
return ret;
}
}
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(avctx, AV_LOG_ERROR,
"PCM bit depth (%d) is greater than normal bit depth (%d)\n",
sps->pcm.bit_depth, sps->bit_depth);
return AVERROR_INVALIDDATA;
}
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(avctx, AV_LOG_ERROR, "Too many short term RPS: %d.\n",
sps->nb_st_rps);
return AVERROR_INVALIDDATA;
}
for (i = 0; i < sps->nb_st_rps; i++) {
if ((ret = ff_hevc_decode_short_term_rps(gb, avctx, &sps->st_rps[i],
sps, 0)) < 0)
return ret;
}
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(avctx, AV_LOG_ERROR, "num_long_term_ref_pics_sps %d is out of range.\n",
sps->num_long_term_ref_pics_sps);
return AVERROR_INVALIDDATA;
}
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(gb, avctx, apply_defdispwin, 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(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(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(avctx, AV_LOG_WARNING,
"cabac_bypass_alignment_enabled_flag not yet implemented\n");
}
}
if (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)) &&
!(avctx->flags & CODEC_FLAG_UNALIGNED)) {
sps->output_window.left_offset &= ~(0x1F >> (sps->pixel_shift));
av_log(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(avctx, AV_LOG_WARNING, "Invalid visible frame dimensions: %dx%d.\n",
sps->output_width, sps->output_height);
if (avctx->err_recognition & AV_EF_EXPLODE) {
return AVERROR_INVALIDDATA;
}
av_log(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;
if (sps->log2_ctb_size > MAX_LOG2_CTB_SIZE) {
av_log(avctx, AV_LOG_ERROR, "CTB size out of range: 2^%d\n", sps->log2_ctb_size);
return AVERROR_INVALIDDATA;
}
if (sps->log2_ctb_size < 4) {
av_log(avctx,
AV_LOG_ERROR,
"log2_ctb_size %d differs from the bounds of any known profile\n",
sps->log2_ctb_size);
avpriv_request_sample(avctx, "log2_ctb_size %d", sps->log2_ctb_size);
return AVERROR_INVALIDDATA;
}
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(avctx, AV_LOG_ERROR, "Invalid coded frame dimensions.\n");
return AVERROR_INVALIDDATA;
}
if (sps->max_transform_hierarchy_depth_inter > sps->log2_ctb_size - sps->log2_min_tb_size) {
av_log(avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_inter out of range: %d\n",
sps->max_transform_hierarchy_depth_inter);
return AVERROR_INVALIDDATA;
}
if (sps->max_transform_hierarchy_depth_intra > sps->log2_ctb_size - sps->log2_min_tb_size) {
av_log(avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_intra out of range: %d\n",
sps->max_transform_hierarchy_depth_intra);
return AVERROR_INVALIDDATA;
}
if (sps->log2_max_trafo_size > FFMIN(sps->log2_ctb_size, 5)) {
av_log(avctx, AV_LOG_ERROR,
"max transform block size out of range: %d\n",
sps->log2_max_trafo_size);
return AVERROR_INVALIDDATA;
}
if (get_bits_left(gb) < 0) {
av_log(avctx, AV_LOG_ERROR,
"Overread SPS by %d bits\n", -get_bits_left(gb));
return AVERROR_INVALIDDATA;
}
return 0;
}
int ff_hevc_decode_nal_sps(GetBitContext *gb, AVCodecContext *avctx,
HEVCParamSets *ps, int apply_defdispwin)
{
HEVCSPS *sps;
AVBufferRef *sps_buf = av_buffer_allocz(sizeof(*sps));
unsigned int sps_id;
int ret;
if (!sps_buf)
return AVERROR(ENOMEM);
sps = (HEVCSPS*)sps_buf->data;
av_log(avctx, AV_LOG_DEBUG, "Decoding SPS\n");
ret = ff_hevc_parse_sps(sps, gb, &sps_id,
apply_defdispwin,
ps->vps_list, avctx);
if (ret < 0) {
av_buffer_unref(&sps_buf);
return ret;
}
if (avctx->debug & FF_DEBUG_BITSTREAM) {
av_log(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 (ps->sps_list[sps_id] &&
!memcmp(ps->sps_list[sps_id]->data, sps_buf->data, sps_buf->size)) {
av_buffer_unref(&sps_buf);
} else {
remove_sps(ps, sps_id);
ps->sps_list[sps_id] = sps_buf;
}
return 0;
}
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(GetBitContext *gb, AVCodecContext *avctx,
HEVCPPS *pps, HEVCSPS *sps) {
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(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(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(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(GetBitContext *gb, AVCodecContext *avctx,
HEVCParamSets *ps)
{
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(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(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(avctx, AV_LOG_ERROR, "SPS id out of range: %d\n", pps->sps_id);
ret = AVERROR_INVALIDDATA;
goto err;
}
if (!ps->sps_list[pps->sps_id]) {
av_log(avctx, AV_LOG_ERROR, "SPS %u does not exist.\n", pps->sps_id);
ret = AVERROR_INVALIDDATA;
goto err;
}
sps = (HEVCSPS *)ps->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(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(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(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(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(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(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(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(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(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(gb, avctx, &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(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(gb, avctx, 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(avctx, AV_LOG_ERROR,
"Overread PPS by %d bits\n", -get_bits_left(gb));
goto err;
}
remove_pps(ps, pps_id);
ps->pps_list[pps_id] = pps_buf;
return 0;
err:
av_buffer_unref(&pps_buf);
return ret;
}
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