mirror of
https://git.ffmpeg.org/ffmpeg.git
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140 lines
6.8 KiB
C
140 lines
6.8 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "dynamic_hdr_vivid.h"
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#include "get_bits.h"
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static const int32_t maxrgb_den = 4095;
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static const int32_t color_saturation_gain_den = 128;
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static const int32_t maximum_luminance_den = 4095;
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static const int32_t base_param_m_p_den = 16383;
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static const int32_t base_param_m_m_den = 10;
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static const int32_t base_param_m_a_den = 1023;
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static const int32_t base_param_m_b_den = 1023;
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static const int32_t base_param_m_n_den = 10;
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static const int32_t base_param_Delta_den = 127;
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int ff_parse_itu_t_t35_to_dynamic_hdr_vivid(AVDynamicHDRVivid *s, const uint8_t *data,
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int size)
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{
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GetBitContext gbc, *gb = &gbc;
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int ret;
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if (!s)
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return AVERROR(ENOMEM);
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ret = init_get_bits8(gb, data, size);
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if (ret < 0)
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return ret;
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if (get_bits_left(gb) < 8)
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return AVERROR_INVALIDDATA;
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s->system_start_code = get_bits(gb, 8);
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if (s->system_start_code == 0x01) {
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s->num_windows = 1;
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if (get_bits_left(gb) < 12 * 4 * s->num_windows)
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return AVERROR_INVALIDDATA;
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for (int w = 0; w < s->num_windows; w++) {
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AVHDRVividColorTransformParams *params = &s->params[w];
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params->minimum_maxrgb = (AVRational){get_bits(gb, 12), maxrgb_den};
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params->average_maxrgb = (AVRational){get_bits(gb, 12), maxrgb_den};
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params->variance_maxrgb = (AVRational){get_bits(gb, 12), maxrgb_den};
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params->maximum_maxrgb = (AVRational){get_bits(gb, 12), maxrgb_den};
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}
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if (get_bits_left(gb) < 2 * s->num_windows)
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return AVERROR_INVALIDDATA;
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for (int w = 0; w < s->num_windows; w++) {
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AVHDRVividColorTransformParams *params = &s->params[w];
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params->tone_mapping_mode_flag = get_bits(gb, 1);
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if (params->tone_mapping_mode_flag) {
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if (get_bits_left(gb) < 1 )
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return AVERROR_INVALIDDATA;
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params->tone_mapping_param_num = get_bits(gb, 1) + 1;
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for (int i = 0; i < params->tone_mapping_param_num; i++) {
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AVHDRVividColorToneMappingParams *tm_params = ¶ms->tm_params[i];
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if (get_bits_left(gb) < 13)
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return AVERROR_INVALIDDATA;
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tm_params->targeted_system_display_maximum_luminance = (AVRational){get_bits(gb, 12), maximum_luminance_den};
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tm_params->base_enable_flag = get_bits(gb, 1);
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if (tm_params->base_enable_flag) {
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if (get_bits_left(gb) < (14 + 6 + 10 + 10 + 6 + 8 + 10))
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return AVERROR_INVALIDDATA;
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tm_params->base_param_m_p = (AVRational){get_bits(gb, 14), base_param_m_p_den};
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tm_params->base_param_m_m = (AVRational){get_bits(gb, 6), base_param_m_m_den};
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tm_params->base_param_m_a = (AVRational){get_bits(gb, 10), base_param_m_a_den};
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tm_params->base_param_m_b = (AVRational){get_bits(gb, 10), base_param_m_b_den};
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tm_params->base_param_m_n = (AVRational){get_bits(gb, 6), base_param_m_n_den};
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tm_params->base_param_k1 = get_bits(gb, 2);
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tm_params->base_param_k2 = get_bits(gb, 2);
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tm_params->base_param_k3 = get_bits(gb, 4);
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tm_params->base_param_Delta_enable_mode = get_bits(gb, 3);
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if (tm_params->base_param_Delta_enable_mode == 2 || tm_params->base_param_Delta_enable_mode == 6)
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tm_params->base_param_Delta = (AVRational){get_bits(gb, 7) * -1, base_param_Delta_den};
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else
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tm_params->base_param_Delta = (AVRational){get_bits(gb, 7), base_param_Delta_den};
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if (get_bits_left(gb) < 1)
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return AVERROR_INVALIDDATA;
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tm_params->three_Spline_enable_flag = get_bits(gb, 1);
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if (tm_params->three_Spline_enable_flag) {
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if (get_bits_left(gb) < 1 + tm_params->three_Spline_num * (2 + 12 + 28 + 1))
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return AVERROR_INVALIDDATA;
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tm_params->three_Spline_num = get_bits(gb, 1) + 1;
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for (int j = 0; j < tm_params->three_Spline_num; j++) {
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tm_params->three_Spline_TH_mode = get_bits(gb, 2);
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if (tm_params->three_Spline_TH_mode == 0 || tm_params->three_Spline_TH_mode == 2) {
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if (get_bits_left(gb) < 8)
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return AVERROR_INVALIDDATA;
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tm_params->three_Spline_TH_enable_MB = (AVRational){get_bits(gb, 8), 255};
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}
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tm_params->three_Spline_TH_enable = (AVRational){get_bits(gb, 12), 4095};
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tm_params->three_Spline_TH_Delta1 = (AVRational){get_bits(gb, 10), 1023};
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tm_params->three_Spline_TH_Delta2 = (AVRational){get_bits(gb, 10), 1023};
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tm_params->three_Spline_enable_Strength = (AVRational){get_bits(gb, 8), 255};
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}
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} else {
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tm_params->three_Spline_num = 1;
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tm_params->three_Spline_TH_mode = 0;
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}
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}
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}
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}
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params->color_saturation_mapping_flag = get_bits(gb, 1);
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if (params->color_saturation_mapping_flag) {
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if (get_bits_left(gb) < 3 + params->color_saturation_num * 8)
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return AVERROR_INVALIDDATA;
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params->color_saturation_num = get_bits(gb, 3);
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for (int i = 0; i < params->color_saturation_num; i++) {
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params->color_saturation_gain[i] = (AVRational){get_bits(gb, 8), color_saturation_gain_den};
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}
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}
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}
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}
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return 0;
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}
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