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hevc_ps.c
1784 lines (1550 loc) · 67.5 KB
/
hevc_ps.c
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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_data.h"
#include "hevc_ps.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 const uint8_t hevc_sub_width_c[] = {
1, 2, 2, 1
};
static const uint8_t hevc_sub_height_c[] = {
1, 2, 1, 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];
rps->rps_idx_num_delta_pocs = rps_ridx->num_delta_pocs;
} 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++;
}
}
if (k >= FF_ARRAY_ELEMS(rps->used)) {
av_log(avctx, AV_LOG_ERROR,
"Invalid num_delta_pocs: %d\n", k);
return AVERROR_INVALIDDATA;
}
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 >= HEVC_MAX_REFS ||
nb_positive_pics >= HEVC_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;
if (delta_poc < 1 || delta_poc > 32768) {
av_log(avctx, AV_LOG_ERROR,
"Invalid value of delta_poc: %d\n",
delta_poc);
return AVERROR_INVALIDDATA;
}
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;
if (delta_poc < 1 || delta_poc > 32768) {
av_log(avctx, AV_LOG_ERROR,
"Invalid value of delta_poc: %d\n",
delta_poc);
return AVERROR_INVALIDDATA;
}
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 + 43 + 1)
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);
if (ptl->profile_idc == 0 && i > 0 && ptl->profile_compatibility_flag[i])
ptl->profile_idc = i;
}
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);
#define check_profile_idc(idc) \
ptl->profile_idc == idc || ptl->profile_compatibility_flag[idc]
if (check_profile_idc(4) || check_profile_idc(5) || check_profile_idc(6) ||
check_profile_idc(7) || check_profile_idc(8) || check_profile_idc(9) ||
check_profile_idc(10)) {
ptl->max_12bit_constraint_flag = get_bits1(gb);
ptl->max_10bit_constraint_flag = get_bits1(gb);
ptl->max_8bit_constraint_flag = get_bits1(gb);
ptl->max_422chroma_constraint_flag = get_bits1(gb);
ptl->max_420chroma_constraint_flag = get_bits1(gb);
ptl->max_monochrome_constraint_flag = get_bits1(gb);
ptl->intra_constraint_flag = get_bits1(gb);
ptl->one_picture_only_constraint_flag = get_bits1(gb);
ptl->lower_bit_rate_constraint_flag = get_bits1(gb);
if (check_profile_idc(5) || check_profile_idc(9) || check_profile_idc(10)) {
ptl->max_14bit_constraint_flag = get_bits1(gb);
skip_bits_long(gb, 33); // XXX_reserved_zero_33bits[0..32]
} else {
skip_bits_long(gb, 34); // XXX_reserved_zero_34bits[0..33]
}
} else if (check_profile_idc(2)) {
skip_bits(gb, 7);
ptl->one_picture_only_constraint_flag = get_bits1(gb);
skip_bits_long(gb, 35); // XXX_reserved_zero_35bits[0..34]
} else {
skip_bits_long(gb, 43); // XXX_reserved_zero_43bits[0..42]
}
if (check_profile_idc(1) || check_profile_idc(2) || check_profile_idc(3) ||
check_profile_idc(4) || check_profile_idc(5) || check_profile_idc(9))
ptl->inbld_flag = get_bits1(gb);
else
skip_bits1(gb);
#undef check_profile_idc
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 * (max_num_sub_layers - 1 > 0))) {
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;
ptrdiff_t nal_size;
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");
nal_size = gb->buffer_end - gb->buffer;
if (nal_size > sizeof(vps->data)) {
av_log(avctx, AV_LOG_WARNING, "Truncating likely oversized VPS "
"(%"PTRDIFF_SPECIFIER" > %"SIZE_SPECIFIER")\n",
nal_size, sizeof(vps->data));
vps->data_size = sizeof(vps->data);
} else {
vps->data_size = nal_size;
}
memcpy(vps->data, gb->buffer, vps->data_size);
vps_id = get_bits(gb, 4);
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 > HEVC_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] > HEVC_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 backup_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 (!av_color_primaries_name(vui->colour_primaries))
vui->colour_primaries = AVCOL_PRI_UNSPECIFIED;
if (!av_color_transfer_name(vui->transfer_characteristic))
vui->transfer_characteristic = AVCOL_TRC_UNSPECIFIED;
if (!av_color_space_name(vui->matrix_coeffs))
vui->matrix_coeffs = AVCOL_SPC_UNSPECIFIED;
if (vui->matrix_coeffs == AVCOL_SPC_RGB) {
switch (sps->pix_fmt) {
case AV_PIX_FMT_YUV444P:
sps->pix_fmt = AV_PIX_FMT_GBRP;
break;
case AV_PIX_FMT_YUV444P10:
sps->pix_fmt = AV_PIX_FMT_GBRP10;
break;
case AV_PIX_FMT_YUV444P12:
sps->pix_fmt = AV_PIX_FMT_GBRP12;
break;
}
}
}
}
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);
// Backup context in case an alternate header is detected
memcpy(&backup, gb, sizeof(backup));
memcpy(&backup_vui, vui, sizeof(backup_vui));
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);
if (vui->default_display_window_flag) {
int vert_mult = hevc_sub_height_c[sps->chroma_format_idc];
int horiz_mult = hevc_sub_width_c[sps->chroma_format_idc];
vui->def_disp_win.left_offset = get_ue_golomb_long(gb) * horiz_mult;
vui->def_disp_win.right_offset = get_ue_golomb_long(gb) * horiz_mult;
vui->def_disp_win.top_offset = get_ue_golomb_long(gb) * vert_mult;
vui->def_disp_win.bottom_offset = get_ue_golomb_long(gb) * vert_mult;
if (apply_defdispwin &&
avctx->flags2 & AV_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;
}
}
timing_info:
vui->vui_timing_info_present_flag = get_bits1(gb);
if (vui->vui_timing_info_present_flag) {
if( get_bits_left(gb) < 66 && !alt) {
// 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");
memcpy(vui, &backup_vui, sizeof(backup_vui));
memcpy(gb, &backup, sizeof(backup));
alt = 1;
goto timing_info;
}
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 %"PRIu32"/%"PRIu32" 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) {
if (get_bits_left(gb) < 8 && !alt) {
av_log(avctx, AV_LOG_WARNING,
"Strange VUI bitstream restriction information, retrying"
" from timing information...\n");
memcpy(vui, &backup_vui, sizeof(backup_vui));
memcpy(gb, &backup, sizeof(backup));
alt = 1;
goto timing_info;
}
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);
}
if (get_bits_left(gb) < 1 && !alt) {
// XXX: Alternate syntax when sps_range_extension_flag != 0?
av_log(avctx, AV_LOG_WARNING,
"Overread in VUI, retrying from timing information...\n");
memcpy(vui, &backup_vui, sizeof(backup_vui));
memcpy(gb, &backup, sizeof(backup));
alt = 1;
goto timing_info;
}
}
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;
uint8_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.
delta *= (size_id == 3) ? 3 : 1;
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) {
int scaling_list_coeff_minus8 = get_se_golomb(gb);
if (scaling_list_coeff_minus8 < -7 ||
scaling_list_coeff_minus8 > 247)
return AVERROR_INVALIDDATA;
scaling_list_dc_coef[size_id - 2][matrix_id] = scaling_list_coeff_minus8 + 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 + 256U + scaling_list_delta_coef) % 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;
}
static int map_pixel_format(AVCodecContext *avctx, HEVCSPS *sps)
{
const AVPixFmtDescriptor *desc;
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_GRAY9;
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_GRAY10;
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_GRAY12;
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,
"The following bit-depths are currently specified: 8, 9, 10 and 12 bits, "
"chroma_format_idc is %d, depth is %d\n",
sps->chroma_format_idc, sps->bit_depth);
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;
return 0;
}
int ff_hevc_parse_sps(HEVCSPS *sps, GetBitContext *gb, unsigned int *sps_id,
int apply_defdispwin, AVBufferRef **vps_list, AVCodecContext *avctx)
{
HEVCWindow *ow;
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 (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 > HEVC_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;
}
sps->temporal_id_nesting_flag = get_bits(gb, 1);
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 >= HEVC_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 > 3U) {
av_log(avctx, AV_LOG_ERROR, "chroma_format_idc %d is invalid\n", sps->chroma_format_idc);
return AVERROR_INVALIDDATA;
}
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
int vert_mult = hevc_sub_height_c[sps->chroma_format_idc];
int horiz_mult = hevc_sub_width_c[sps->chroma_format_idc];
sps->pic_conf_win.left_offset = get_ue_golomb_long(gb) * horiz_mult;
sps->pic_conf_win.right_offset = get_ue_golomb_long(gb) * horiz_mult;
sps->pic_conf_win.top_offset = get_ue_golomb_long(gb) * vert_mult;
sps->pic_conf_win.bottom_offset = get_ue_golomb_long(gb) * vert_mult;
if (avctx->flags2 & AV_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;
}
sps->bit_depth_chroma = bit_depth_chroma;
ret = map_pixel_format(avctx, sps);
if (ret < 0)