ffmpeg/libavcodec/dynamic_hdr10_plus.c

199 lines
7.2 KiB
C

/*
* 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;
}