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avutil: add HDR10+ dynamic metadata serialization function

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Co-authored-by: Mohammad Izadi <moh.izadi@gmail.com>
Signed-off-by: Raphaël Zumer <rzumer@tebako.net>
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
Raphaël Zumer 2023-03-14 19:05:35 -04:00 committed by James Almer
parent 6f2413a203
commit 0a3ce5f738
4 changed files with 166 additions and 1 deletions
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5
doc/APIchanges
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@ -2,6 +2,11 @@ The last version increases of all libraries were on 2023-02-09
API changes, most recent first:
2023-03-21 - xxxxxxxxxx - lavu 58.5.100 - hdr_dynamic_metadata.h
Add av_dynamic_hdr_plus_from_t35() and av_dynamic_hdr_plus_to_t35()
functions to convert between raw T.35 payloads containing dynamic
HDR10+ metadata and their parsed representations as AVDynamicHDRPlus.
2023-03-17 - xxxxxxxxxx - lavu 58.4.100 - hdr_dynamic_vivid_metadata.h
Add two group of three spline params.
Deprecate previous define which only supports one group of params.

148
libavutil/hdr_dynamic_metadata.c
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@ -22,6 +22,7 @@
#include "mem.h"
#include "libavcodec/defs.h"
#include "libavcodec/get_bits.h"
#include "libavcodec/put_bits.h"
#define T35_PAYLOAD_MAX_SIZE 907
@ -235,3 +236,150 @@ int av_dynamic_hdr_plus_from_t35(AVDynamicHDRPlus *s, const uint8_t *data,
return 0;
}
int av_dynamic_hdr_plus_to_t35(const AVDynamicHDRPlus *s, uint8_t **data, size_t *size)
{
uint8_t *buf;
size_t size_bits, size_bytes;
PutBitContext pbc, *pb = &pbc;
if (!s || !data)
return AVERROR(EINVAL);
/**
* Buffer size per CTA-861-H p.253-254:
* 48 header bits (excluded from the serialized payload)
* 8 bits for application_mode
* 2 bits for num_windows
* 153 bits for window geometry, for each window above 1
* 27 bits for targeted_system_display_maximum_luminance
* 1-2511 bits for targeted system display peak luminance information
* 82-442 bits per window for pixel distribution information
* 1-2511 bits for mastering display peak luminance information
* 1-179 bits per window for tonemapping information
* 1-7 bits per window for color saturation mapping information
* Total: 123-7249 bits, excluding trimmed header bits
*/
size_bits = 8;
size_bits += 2;
for (int w = 1; w < s->num_windows; w++)
size_bits += 153;
size_bits += 27;
size_bits += 1;
if (s->targeted_system_display_actual_peak_luminance_flag)
size_bits += 10 +
s->num_rows_targeted_system_display_actual_peak_luminance *
s->num_cols_targeted_system_display_actual_peak_luminance * 4;
for (int w = 0; w < s->num_windows; w++)
size_bits += 72 + s->params[w].num_distribution_maxrgb_percentiles * 24 + 10;
size_bits += 1;
if (s->mastering_display_actual_peak_luminance_flag)
size_bits += 10 +
s->num_rows_mastering_display_actual_peak_luminance *
s->num_cols_mastering_display_actual_peak_luminance * 4;
for (int w = 0; w < s->num_windows; w++) {
size_bits += 1;
if (s->params[w].tone_mapping_flag)
size_bits += 28 + s->params[w].num_bezier_curve_anchors * 10;
size_bits += 1;
if (s->params[w].color_saturation_mapping_flag)
size_bits += 6;
}
size_bytes = (size_bits + 7) / 8;
buf = av_mallocz(size_bytes);
if (!buf)
return AVERROR(ENOMEM);
init_put_bits(pb, buf, size_bytes);
// application_mode is set to Application Version 1
put_bits(pb, 8, 1);
// Payload as per CTA-861-H p.253-254
put_bits(pb, 2, s->num_windows);
for (int w = 1; w < s->num_windows; w++) {
put_bits(pb, 16, s->params[w].window_upper_left_corner_x.num / s->params[w].window_upper_left_corner_x.den);
put_bits(pb, 16, s->params[w].window_upper_left_corner_y.num / s->params[w].window_upper_left_corner_y.den);
put_bits(pb, 16, s->params[w].window_lower_right_corner_x.num / s->params[w].window_lower_right_corner_x.den);
put_bits(pb, 16, s->params[w].window_lower_right_corner_y.num / s->params[w].window_lower_right_corner_y.den);
put_bits(pb, 16, s->params[w].center_of_ellipse_x);
put_bits(pb, 16, s->params[w].center_of_ellipse_y);
put_bits(pb, 8, s->params[w].rotation_angle);
put_bits(pb, 16, s->params[w].semimajor_axis_internal_ellipse);
put_bits(pb, 16, s->params[w].semimajor_axis_external_ellipse);
put_bits(pb, 16, s->params[w].semiminor_axis_external_ellipse);
put_bits(pb, 1, s->params[w].overlap_process_option);
}
put_bits(pb, 27, s->targeted_system_display_maximum_luminance.num * luminance_den /
s->targeted_system_display_maximum_luminance.den);
put_bits(pb, 1, s->targeted_system_display_actual_peak_luminance_flag);
if (s->targeted_system_display_actual_peak_luminance_flag) {
put_bits(pb, 5, s->num_rows_targeted_system_display_actual_peak_luminance);
put_bits(pb, 5, s->num_cols_targeted_system_display_actual_peak_luminance);
for (int i = 0; i < s->num_rows_targeted_system_display_actual_peak_luminance; i++) {
for (int j = 0; j < s->num_cols_targeted_system_display_actual_peak_luminance; j++)
put_bits(pb, 4, s->targeted_system_display_actual_peak_luminance[i][j].num * peak_luminance_den /
s->targeted_system_display_actual_peak_luminance[i][j].den);
}
}
for (int w = 0; w < s->num_windows; w++) {
for (int i = 0; i < 3; i++)
put_bits(pb, 17, s->params[w].maxscl[i].num * rgb_den / s->params[w].maxscl[i].den);
put_bits(pb, 17, s->params[w].average_maxrgb.num * rgb_den / s->params[w].average_maxrgb.den);
put_bits(pb, 4, s->params[w].num_distribution_maxrgb_percentiles);
for (int i = 0; i < s->params[w].num_distribution_maxrgb_percentiles; i++) {
put_bits(pb, 7, s->params[w].distribution_maxrgb[i].percentage);
put_bits(pb, 17, s->params[w].distribution_maxrgb[i].percentile.num * rgb_den /
s->params[w].distribution_maxrgb[i].percentile.den);
}
put_bits(pb, 10, s->params[w].fraction_bright_pixels.num * fraction_pixel_den /
s->params[w].fraction_bright_pixels.den);
}
put_bits(pb, 1, s->mastering_display_actual_peak_luminance_flag);
if (s->mastering_display_actual_peak_luminance_flag) {
put_bits(pb, 5, s->num_rows_mastering_display_actual_peak_luminance);
put_bits(pb, 5, s->num_cols_mastering_display_actual_peak_luminance);
for (int i = 0; i < s->num_rows_mastering_display_actual_peak_luminance; i++) {
for (int j = 0; j < s->num_cols_mastering_display_actual_peak_luminance; j++)
put_bits(pb, 4, s->mastering_display_actual_peak_luminance[i][j].num * peak_luminance_den /
s->mastering_display_actual_peak_luminance[i][j].den);
}
}
for (int w = 0; w < s->num_windows; w++) {
put_bits(pb, 1, s->params[w].tone_mapping_flag);
if (s->params[w].tone_mapping_flag) {
put_bits(pb, 12, s->params[w].knee_point_x.num * knee_point_den / s->params[w].knee_point_x.den);
put_bits(pb, 12, s->params[w].knee_point_y.num * knee_point_den / s->params[w].knee_point_y.den);
put_bits(pb, 4, s->params[w].num_bezier_curve_anchors);
for (int i = 0; i < s->params[w].num_bezier_curve_anchors; i++)
put_bits(pb, 10, s->params[w].bezier_curve_anchors[i].num * bezier_anchor_den /
s->params[w].bezier_curve_anchors[i].den);
put_bits(pb, 1, s->params[w].color_saturation_mapping_flag);
if (s->params[w].color_saturation_mapping_flag)
put_bits(pb, 6, s->params[w].color_saturation_weight.num * saturation_weight_den /
s->params[w].color_saturation_weight.den);
}
}
flush_put_bits(pb);
*data = buf;
if (size)
*size = size_bytes;
return 0;
}

12
libavutil/hdr_dynamic_metadata.h
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@ -353,4 +353,16 @@ AVDynamicHDRPlus *av_dynamic_hdr_plus_create_side_data(AVFrame *frame);
int av_dynamic_hdr_plus_from_t35(AVDynamicHDRPlus *s, const uint8_t *data,
size_t size);
/**
* Serialize dynamic HDR10+ metadata to a user data registered ITU-T T.35 buffer,
* excluding the first 48 bytes of the header, and beginning with the application mode.
* @param s A pointer containing the decoded AVDynamicHDRPlus structure.
* @param data A pointer to a byte buffer to be allocated and filled
* with the serialized metadata.
* @param size A pointer to a size to be set to the returned buffer's size (optional).
*
* @return >= 0 on success. Otherwise, returns the appropriate AVERROR.
*/
int av_dynamic_hdr_plus_to_t35(const AVDynamicHDRPlus *s, uint8_t **data, size_t *size);
#endif /* AVUTIL_HDR_DYNAMIC_METADATA_H */

2
libavutil/version.h
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@ -79,7 +79,7 @@
*/
#define LIBAVUTIL_VERSION_MAJOR 58
#define LIBAVUTIL_VERSION_MINOR 4
#define LIBAVUTIL_VERSION_MINOR 5
#define LIBAVUTIL_VERSION_MICRO 100
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \