199 lines
7.2 KiB
C
199 lines
7.2 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_hdr10_plus.h"
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#include "get_bits.h"
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static const int64_t luminance_den = 1;
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static const int32_t peak_luminance_den = 15;
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static const int64_t rgb_den = 100000;
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static const int32_t fraction_pixel_den = 1000;
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static const int32_t knee_point_den = 4095;
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static const int32_t bezier_anchor_den = 1023;
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static const int32_t saturation_weight_den = 8;
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int ff_parse_itu_t_t35_to_dynamic_hdr10_plus(AVDynamicHDRPlus *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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s->application_version = get_bits(gb, 8);
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if (get_bits_left(gb) < 2)
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return AVERROR_INVALIDDATA;
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s->num_windows = get_bits(gb, 2);
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if (s->num_windows < 1 || s->num_windows > 3) {
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return AVERROR_INVALIDDATA;
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}
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if (get_bits_left(gb) < ((19 * 8 + 1) * (s->num_windows - 1)))
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return AVERROR_INVALIDDATA;
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for (int w = 1; w < s->num_windows; w++) {
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// The corners are set to absolute coordinates here. They should be
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// converted to the relative coordinates (in [0, 1]) in the decoder.
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AVHDRPlusColorTransformParams *params = &s->params[w];
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params->window_upper_left_corner_x =
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(AVRational){get_bits(gb, 16), 1};
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params->window_upper_left_corner_y =
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(AVRational){get_bits(gb, 16), 1};
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params->window_lower_right_corner_x =
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(AVRational){get_bits(gb, 16), 1};
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params->window_lower_right_corner_y =
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(AVRational){get_bits(gb, 16), 1};
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params->center_of_ellipse_x = get_bits(gb, 16);
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params->center_of_ellipse_y = get_bits(gb, 16);
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params->rotation_angle = get_bits(gb, 8);
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params->semimajor_axis_internal_ellipse = get_bits(gb, 16);
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params->semimajor_axis_external_ellipse = get_bits(gb, 16);
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params->semiminor_axis_external_ellipse = get_bits(gb, 16);
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params->overlap_process_option = get_bits1(gb);
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}
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if (get_bits_left(gb) < 28)
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return AVERROR(EINVAL);
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s->targeted_system_display_maximum_luminance =
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(AVRational){get_bits_long(gb, 27), luminance_den};
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s->targeted_system_display_actual_peak_luminance_flag = get_bits1(gb);
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if (s->targeted_system_display_actual_peak_luminance_flag) {
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int rows, cols;
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if (get_bits_left(gb) < 10)
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return AVERROR(EINVAL);
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rows = get_bits(gb, 5);
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cols = get_bits(gb, 5);
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if (((rows < 2) || (rows > 25)) || ((cols < 2) || (cols > 25))) {
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return AVERROR_INVALIDDATA;
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}
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s->num_rows_targeted_system_display_actual_peak_luminance = rows;
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s->num_cols_targeted_system_display_actual_peak_luminance = cols;
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if (get_bits_left(gb) < (rows * cols * 4))
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return AVERROR(EINVAL);
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for (int i = 0; i < rows; i++) {
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for (int j = 0; j < cols; j++) {
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s->targeted_system_display_actual_peak_luminance[i][j] =
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(AVRational){get_bits(gb, 4), peak_luminance_den};
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}
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}
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}
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for (int w = 0; w < s->num_windows; w++) {
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AVHDRPlusColorTransformParams *params = &s->params[w];
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if (get_bits_left(gb) < (3 * 17 + 17 + 4))
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return AVERROR(EINVAL);
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for (int i = 0; i < 3; i++) {
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params->maxscl[i] =
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(AVRational){get_bits(gb, 17), rgb_den};
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}
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params->average_maxrgb =
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(AVRational){get_bits(gb, 17), rgb_den};
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params->num_distribution_maxrgb_percentiles = get_bits(gb, 4);
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if (get_bits_left(gb) <
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(params->num_distribution_maxrgb_percentiles * 24))
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return AVERROR(EINVAL);
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for (int i = 0; i < params->num_distribution_maxrgb_percentiles; i++) {
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params->distribution_maxrgb[i].percentage = get_bits(gb, 7);
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params->distribution_maxrgb[i].percentile =
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(AVRational){get_bits(gb, 17), rgb_den};
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}
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if (get_bits_left(gb) < 10)
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return AVERROR(EINVAL);
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params->fraction_bright_pixels = (AVRational){get_bits(gb, 10), fraction_pixel_den};
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}
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if (get_bits_left(gb) < 1)
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return AVERROR(EINVAL);
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s->mastering_display_actual_peak_luminance_flag = get_bits1(gb);
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if (s->mastering_display_actual_peak_luminance_flag) {
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int rows, cols;
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if (get_bits_left(gb) < 10)
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return AVERROR(EINVAL);
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rows = get_bits(gb, 5);
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cols = get_bits(gb, 5);
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if (((rows < 2) || (rows > 25)) || ((cols < 2) || (cols > 25))) {
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return AVERROR_INVALIDDATA;
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}
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s->num_rows_mastering_display_actual_peak_luminance = rows;
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s->num_cols_mastering_display_actual_peak_luminance = cols;
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if (get_bits_left(gb) < (rows * cols * 4))
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return AVERROR(EINVAL);
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for (int i = 0; i < rows; i++) {
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for (int j = 0; j < cols; j++) {
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s->mastering_display_actual_peak_luminance[i][j] =
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(AVRational){get_bits(gb, 4), peak_luminance_den};
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}
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}
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}
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for (int w = 0; w < s->num_windows; w++) {
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AVHDRPlusColorTransformParams *params = &s->params[w];
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if (get_bits_left(gb) < 1)
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return AVERROR(EINVAL);
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params->tone_mapping_flag = get_bits1(gb);
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if (params->tone_mapping_flag) {
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if (get_bits_left(gb) < 28)
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return AVERROR(EINVAL);
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params->knee_point_x =
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(AVRational){get_bits(gb, 12), knee_point_den};
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params->knee_point_y =
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(AVRational){get_bits(gb, 12), knee_point_den};
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params->num_bezier_curve_anchors = get_bits(gb, 4);
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if (get_bits_left(gb) < (params->num_bezier_curve_anchors * 10))
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return AVERROR(EINVAL);
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for (int i = 0; i < params->num_bezier_curve_anchors; i++) {
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params->bezier_curve_anchors[i] =
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(AVRational){get_bits(gb, 10), bezier_anchor_den};
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}
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}
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if (get_bits_left(gb) < 1)
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return AVERROR(EINVAL);
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params->color_saturation_mapping_flag = get_bits1(gb);
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if (params->color_saturation_mapping_flag) {
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if (get_bits_left(gb) < 6)
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return AVERROR(EINVAL);
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params->color_saturation_weight =
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(AVRational){get_bits(gb, 6), saturation_weight_den};
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}
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}
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return 0;
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}
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