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