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/*
* 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 "dynamic_hdr_vivid.h"
#include "get_bits.h"
static const int32_t maxrgb_den = 4095;
static const int32_t color_saturation_gain_den = 128;
static const int32_t maximum_luminance_den = 4095;
static const int32_t base_param_m_p_den = 16383;
static const int32_t base_param_m_m_den = 10;
static const int32_t base_param_m_a_den = 1023;
static const int32_t base_param_m_b_den = 1023;
static const int32_t base_param_m_n_den = 10;
static const int32_t base_param_Delta_den = 127;
int ff_parse_itu_t_t35_to_dynamic_hdr_vivid(AVDynamicHDRVivid *s, const uint8_t *data,
int size)
{
GetBitContext gbc, *gb = &gbc;
int ret;
if (!s)
return AVERROR(ENOMEM);
ret = init_get_bits8(gb, data, size);
if (ret < 0)
return ret;
if (get_bits_left(gb) < 8)
return AVERROR_INVALIDDATA;
s->system_start_code = get_bits(gb, 8);
if (s->system_start_code == 0x01) {
s->num_windows = 1;
if (get_bits_left(gb) < 12 * 4 * s->num_windows)
return AVERROR_INVALIDDATA;
for (int w = 0; w < s->num_windows; w++) {
AVHDRVividColorTransformParams *params = &s->params[w];
params->minimum_maxrgb = (AVRational){get_bits(gb, 12), maxrgb_den};
params->average_maxrgb = (AVRational){get_bits(gb, 12), maxrgb_den};
params->variance_maxrgb = (AVRational){get_bits(gb, 12), maxrgb_den};
params->maximum_maxrgb = (AVRational){get_bits(gb, 12), maxrgb_den};
}
if (get_bits_left(gb) < 2 * s->num_windows)
return AVERROR_INVALIDDATA;
for (int w = 0; w < s->num_windows; w++) {
AVHDRVividColorTransformParams *params = &s->params[w];
params->tone_mapping_mode_flag = get_bits(gb, 1);
if (params->tone_mapping_mode_flag) {
if (get_bits_left(gb) < 1 )
return AVERROR_INVALIDDATA;
params->tone_mapping_param_num = get_bits(gb, 1) + 1;
for (int i = 0; i < params->tone_mapping_param_num; i++) {
AVHDRVividColorToneMappingParams *tm_params = ¶ms->tm_params[i];
if (get_bits_left(gb) < 13)
return AVERROR_INVALIDDATA;
tm_params->targeted_system_display_maximum_luminance = (AVRational){get_bits(gb, 12), maximum_luminance_den};
tm_params->base_enable_flag = get_bits(gb, 1);
if (tm_params->base_enable_flag) {
if (get_bits_left(gb) < (14 + 6 + 10 + 10 + 6 + 8 + 10))
return AVERROR_INVALIDDATA;
tm_params->base_param_m_p = (AVRational){get_bits(gb, 14), base_param_m_p_den};
tm_params->base_param_m_m = (AVRational){get_bits(gb, 6), base_param_m_m_den};
tm_params->base_param_m_a = (AVRational){get_bits(gb, 10), base_param_m_a_den};
tm_params->base_param_m_b = (AVRational){get_bits(gb, 10), base_param_m_b_den};
tm_params->base_param_m_n = (AVRational){get_bits(gb, 6), base_param_m_n_den};
tm_params->base_param_k1 = get_bits(gb, 2);
tm_params->base_param_k2 = get_bits(gb, 2);
tm_params->base_param_k3 = get_bits(gb, 4);
tm_params->base_param_Delta_enable_mode = get_bits(gb, 3);
if (tm_params->base_param_Delta_enable_mode == 2 || tm_params->base_param_Delta_enable_mode == 6)
tm_params->base_param_Delta = (AVRational){get_bits(gb, 7) * -1, base_param_Delta_den};
else
tm_params->base_param_Delta = (AVRational){get_bits(gb, 7), base_param_Delta_den};
if (get_bits_left(gb) < 1)
return AVERROR_INVALIDDATA;
tm_params->three_Spline_enable_flag = get_bits(gb, 1);
if (tm_params->three_Spline_enable_flag) {
if (get_bits_left(gb) < 1 + tm_params->three_Spline_num * (2 + 12 + 28 + 1))
return AVERROR_INVALIDDATA;
tm_params->three_Spline_num = get_bits(gb, 1) + 1;
for (int j = 0; j < tm_params->three_Spline_num; j++) {
tm_params->three_Spline_TH_mode = get_bits(gb, 2);
if (tm_params->three_Spline_TH_mode == 0 || tm_params->three_Spline_TH_mode == 2) {
if (get_bits_left(gb) < 8)
return AVERROR_INVALIDDATA;
tm_params->three_Spline_TH_enable_MB = (AVRational){get_bits(gb, 8), 255};
}
tm_params->three_Spline_TH_enable = (AVRational){get_bits(gb, 12), 4095};
tm_params->three_Spline_TH_Delta1 = (AVRational){get_bits(gb, 10), 1023};
tm_params->three_Spline_TH_Delta2 = (AVRational){get_bits(gb, 10), 1023};
tm_params->three_Spline_enable_Strength = (AVRational){get_bits(gb, 8), 255};
}
} else {
tm_params->three_Spline_num = 1;
tm_params->three_Spline_TH_mode = 0;
}
}
}
}
params->color_saturation_mapping_flag = get_bits(gb, 1);
if (params->color_saturation_mapping_flag) {
if (get_bits_left(gb) < 3 + params->color_saturation_num * 8)
return AVERROR_INVALIDDATA;
params->color_saturation_num = get_bits(gb, 3);
for (int i = 0; i < params->color_saturation_num; i++) {
params->color_saturation_gain[i] = (AVRational){get_bits(gb, 8), color_saturation_gain_den};
}
}
}
}
return 0;
}
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