[FFmpeg-devel] [PATCH] Update HDR10+ metadata structure.
Mohammad Izadi
moh.izadi at gmail.com
Tue Feb 18 20:00:13 EET 2020
Hello,
What's the status of the cl review? Is it good to submit?
--
Best,
Mohammad
On Mon, Feb 10, 2020 at 11:44 AM Mohammad Izadi <moh.izadi at gmail.com> wrote:
> From: Mohammad Izadi <izadi at google.com>
>
> Trying to read HDR10+ metadata from HEVC/SEI and pass it to packet side
> data in the follow-up CLs.
> ---
> libavutil/hdr_dynamic_metadata.c | 165 +++++++++++++++++++++++++++++++
> libavutil/hdr_dynamic_metadata.h | 13 ++-
> libavutil/version.h | 2 +-
> 3 files changed, 178 insertions(+), 2 deletions(-)
>
> diff --git a/libavutil/hdr_dynamic_metadata.c
> b/libavutil/hdr_dynamic_metadata.c
> index 0fa1ee82de..f24bcb40f5 100644
> --- a/libavutil/hdr_dynamic_metadata.c
> +++ b/libavutil/hdr_dynamic_metadata.c
> @@ -19,8 +19,17 @@
> */
>
> #include "hdr_dynamic_metadata.h"
> +#include "libavcodec/get_bits.h"
> #include "mem.h"
>
> +static const int32_t luminance_den = 1;
> +static const int32_t peak_luminance_den = 15;
> +static const int32_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;
> +
> AVDynamicHDRPlus *av_dynamic_hdr_plus_alloc(size_t *size)
> {
> AVDynamicHDRPlus *hdr_plus = av_mallocz(sizeof(AVDynamicHDRPlus));
> @@ -45,3 +54,159 @@ AVDynamicHDRPlus
> *av_dynamic_hdr_plus_create_side_data(AVFrame *frame)
>
> return (AVDynamicHDRPlus *)side_data->data;
> }
> +
> +int av_dynamic_hdr_plus_decode(const uint8_t *data, size_t size,
> + AVDynamicHDRPlus *s)
> +{
> + int w, i, j;
> + GetBitContext gb;
> + if (!data)
> + return AVERROR_INVALIDDATA;
> +
> + int ret = init_get_bits8(&gb, data, size);
> + if (ret < 0)
> + return AVERROR_INVALIDDATA;
> +
> + 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 (w = 1; w < s->num_windows; w++) {
> + s->params[w].window_upper_left_corner_x.num = get_bits(&gb, 16);
> + s->params[w].window_upper_left_corner_y.num = get_bits(&gb, 16);
> + s->params[w].window_lower_right_corner_x.num = get_bits(&gb, 16);
> + s->params[w].window_lower_right_corner_y.num = get_bits(&gb, 16);
> + // The corners are set to absolute coordinates here. They should
> be
> + // converted to the relative coordinates (in [0, 1]) in the
> decoder.
> + s->params[w].window_upper_left_corner_x.den = 1;
> + s->params[w].window_upper_left_corner_y.den = 1;
> + s->params[w].window_lower_right_corner_x.den = 1;
> + s->params[w].window_lower_right_corner_y.den = 1;
> +
> + s->params[w].center_of_ellipse_x = get_bits(&gb, 16);
> + s->params[w].center_of_ellipse_y = get_bits(&gb, 16);
> + s->params[w].rotation_angle = get_bits(&gb, 8);
> + s->params[w].semimajor_axis_internal_ellipse = get_bits(&gb, 16);
> + s->params[w].semimajor_axis_external_ellipse = get_bits(&gb, 16);
> + s->params[w].semiminor_axis_external_ellipse = get_bits(&gb, 16);
> + s->params[w].overlap_process_option = get_bits1(&gb);
> + }
> +
> + if (get_bits_left(&gb) < 28)
> + return AVERROR_INVALIDDATA;
> + s->targeted_system_display_maximum_luminance.num = get_bits(&gb, 27);
> + s->targeted_system_display_maximum_luminance.den = 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_INVALIDDATA;
> + 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_INVALIDDATA;
> +
> + for (i = 0; i < rows; i++) {
> + for (j = 0; j < cols; j++) {
> +
> s->targeted_system_display_actual_peak_luminance[i][j].num = get_bits(&gb,
> 4);
> +
> s->targeted_system_display_actual_peak_luminance[i][j].den =
> peak_luminance_den;
> + }
> + }
> + }
> + for (w = 0; w < s->num_windows; w++) {
> + if (get_bits_left(&gb) < (3 * 17 + 17 + 4))
> + return AVERROR_INVALIDDATA;
> + for (i = 0; i < 3; i++) {
> + s->params[w].maxscl[i].num = get_bits(&gb, 17);
> + s->params[w].maxscl[i].den = rgb_den;
> + }
> + s->params[w].average_maxrgb.num = get_bits(&gb, 17);
> + s->params[w].average_maxrgb.den = rgb_den;
> + s->params[w].num_distribution_maxrgb_percentiles = get_bits(&gb,
> 4);
> +
> + if (get_bits_left(&gb) <
> + (s->params[w].num_distribution_maxrgb_percentiles * 24))
> + return AVERROR_INVALIDDATA;
> + for (i = 0; i < s->params[w].num_distribution_maxrgb_percentiles;
> i++) {
> + s->params[w].distribution_maxrgb[i].percentage =
> get_bits(&gb, 7);
> + s->params[w].distribution_maxrgb[i].percentile.num =
> get_bits(&gb, 17);
> + s->params[w].distribution_maxrgb[i].percentile.den = rgb_den;
> + }
> +
> + if (get_bits_left(&gb) < 10)
> + return AVERROR_INVALIDDATA;
> + s->params[w].fraction_bright_pixels.num = get_bits(&gb, 10);
> + s->params[w].fraction_bright_pixels.den = fraction_pixel_den;
> + }
> + if (get_bits_left(&gb) < 1)
> + return AVERROR_INVALIDDATA;
> + 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_INVALIDDATA;
> + 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_INVALIDDATA;
> +
> + for (i = 0; i < rows; i++) {
> + for (j = 0; j < cols; j++) {
> + s->mastering_display_actual_peak_luminance[i][j].num =
> get_bits(&gb, 4);
> + s->mastering_display_actual_peak_luminance[i][j].den =
> peak_luminance_den;
> + }
> + }
> + }
> +
> + for (w = 0; w < s->num_windows; w++) {
> + if (get_bits_left(&gb) < 1)
> + return AVERROR_INVALIDDATA;
> + s->params[w].tone_mapping_flag = get_bits1(&gb);
> + if (s->params[w].tone_mapping_flag) {
> + if (get_bits_left(&gb) < 28)
> + return AVERROR_INVALIDDATA;
> + s->params[w].knee_point_x.num = get_bits(&gb, 12);
> + s->params[w].knee_point_x.den = knee_point_den;
> + s->params[w].knee_point_y.num = get_bits(&gb, 12);
> + s->params[w].knee_point_y.den = knee_point_den;
> + s->params[w].num_bezier_curve_anchors = get_bits(&gb, 4);
> +
> + if (get_bits_left(&gb) <
> (s->params[w].num_bezier_curve_anchors * 10))
> + return AVERROR_INVALIDDATA;
> + for (i = 0; i < s->params[w].num_bezier_curve_anchors; i++) {
> + s->params[w].bezier_curve_anchors[i].num = get_bits(&gb,
> 10);
> + s->params[w].bezier_curve_anchors[i].den =
> bezier_anchor_den;
> + }
> + }
> +
> + if (get_bits_left(&gb) < 1)
> + return AVERROR_INVALIDDATA;
> + s->params[w].color_saturation_mapping_flag = get_bits1(&gb);
> + if (s->params[w].color_saturation_mapping_flag) {
> + if (get_bits_left(&gb) < 6)
> + return AVERROR_INVALIDDATA;
> + s->params[w].color_saturation_weight.num = get_bits(&gb, 6);
> + s->params[w].color_saturation_weight.den =
> saturation_weight_den;
> + }
> + }
> +
> + return 0;
> +}
> diff --git a/libavutil/hdr_dynamic_metadata.h
> b/libavutil/hdr_dynamic_metadata.h
> index 2d72de56ae..107df4bacf 100644
> --- a/libavutil/hdr_dynamic_metadata.h
> +++ b/libavutil/hdr_dynamic_metadata.h
> @@ -265,7 +265,7 @@ typedef struct AVDynamicHDRPlus {
>
> /**
> * The nominal maximum display luminance of the targeted system
> display,
> - * in units of 0.0001 candelas per square metre. The value shall be in
> + * in units of 1 candelas per square metre. The value shall be in
> * the range of 0 to 10000, inclusive.
> */
> AVRational targeted_system_display_maximum_luminance;
> @@ -340,4 +340,15 @@ AVDynamicHDRPlus *av_dynamic_hdr_plus_alloc(size_t
> *size);
> */
> AVDynamicHDRPlus *av_dynamic_hdr_plus_create_side_data(AVFrame *frame);
>
> +/**
> + * Decode the payload of SMPTE ST 2094-40 (coming from the user data
> registered
> + * ITU-T T.35) to AVDynamicHDRPlus.
> + * @param data The payload of SMPTE ST 2094-40 extracted from the user
> data registered ITU-T T.35.
> + * @param size The size of the payload of SMPTE ST 2094-40.
> + * @param s The decoded AVDynamicHDRPlus structure.
> + *
> + * @return 0 if succeed. Otherwise, returns the appropriate AVERROR.
> + */
> +int av_dynamic_hdr_plus_decode(const uint8_t *data, size_t size,
> AVDynamicHDRPlus *s);
> +
> #endif /* AVUTIL_HDR_DYNAMIC_METADATA_H */
> diff --git a/libavutil/version.h b/libavutil/version.h
> index af8f614aff..2bc1b98615 100644
> --- a/libavutil/version.h
> +++ b/libavutil/version.h
> @@ -79,7 +79,7 @@
> */
>
> #define LIBAVUTIL_VERSION_MAJOR 56
> -#define LIBAVUTIL_VERSION_MINOR 38
> +#define LIBAVUTIL_VERSION_MINOR 39
> #define LIBAVUTIL_VERSION_MICRO 100
>
> #define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
> --
> 2.25.0.341.g760bfbb309-goog
>
>
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