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198 lines
7.2 KiB
198 lines
7.2 KiB
/* |
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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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if (get_bits_left(gb) < 10) |
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return AVERROR_INVALIDDATA; |
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s->application_version = get_bits(gb, 8); |
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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_INVALIDDATA; |
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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_INVALIDDATA; |
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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_INVALIDDATA; |
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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_INVALIDDATA; |
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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_INVALIDDATA; |
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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_INVALIDDATA; |
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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_INVALIDDATA; |
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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_INVALIDDATA; |
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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_INVALIDDATA; |
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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_INVALIDDATA; |
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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_INVALIDDATA; |
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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_INVALIDDATA; |
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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_INVALIDDATA; |
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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_INVALIDDATA; |
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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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