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([2600:4041:6c:7000:1f01:20c:8ba9:815b]) by smtp.gmail.com with ESMTPSA id d11-20020a05620a158b00b0073b8745fd39sm204280qkk.110.2023.03.02.11.25.22 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 02 Mar 2023 11:25:23 -0800 (PST) Message-ID: Date: Thu, 2 Mar 2023 14:25:22 -0500 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.2.2 From: =?utf-8?q?Rapha=C3=ABl_Zumer?= To: ffmpeg-devel@ffmpeg.org Content-Language: en-US, fr-FR Subject: [FFmpeg-devel] [PATCH 2/2] avutil: add HDR10+ dynamic metadata serialization function X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" X-TUID: sZhymQRrKBZq Signed-off-by: Raphaël Zumer --- libavutil/hdr_dynamic_metadata.c | 146 +++++++++++++++++++++++++++++++ libavutil/hdr_dynamic_metadata.h | 11 +++ libavutil/version.h | 2 +- 3 files changed, 158 insertions(+), 1 deletion(-) diff --git a/libavutil/hdr_dynamic_metadata.c b/libavutil/hdr_dynamic_metadata.c index 98f399b032..39a7886a2e 100644 --- a/libavutil/hdr_dynamic_metadata.c +++ b/libavutil/hdr_dynamic_metadata.c @@ -225,3 +225,149 @@ int av_dynamic_hdr_plus_from_t35(AVDynamicHDRPlus *s, const uint8_t *data, return 0; } + +AVBufferRef *av_dynamic_hdr_plus_to_t35(AVDynamicHDRPlus *s) +{ + AVBufferRef *buf; + size_t size_bits, size_bytes; + PutBitContext pbc, *pb = &pbc; + + if (!s) + return NULL; + + // Buffer size per CTA-861-H p.253-254: + size_bits = + // 56 bits for the header, minus 8-bit excluded country code + 48 + + // 2 bits for num_windows + 2 + + // 937 bits for window geometry for each window above 1 + FFMAX((s->num_windows - 1), 0) * 937 + + // 27 bits for targeted_system_display_maximum_luminance + 27 + + // 1-3855 bits for targeted system display peak luminance information + 1 + (s->targeted_system_display_actual_peak_luminance_flag ? 10 + + s->num_rows_targeted_system_display_actual_peak_luminance * + s->num_cols_targeted_system_display_actual_peak_luminance * 4 : 0) + + // 0-442 bits for intra-window pixel distribution information + s->num_windows * 82; + for (int w = 0; w < s->num_windows; w++) { + size_bits += s->params[w].num_distribution_maxrgb_percentiles * 24; + } + // 1-3855 bits for mastering display peak luminance information + size_bits += 1 + (s->mastering_display_actual_peak_luminance_flag ? 10 + + s->num_rows_mastering_display_actual_peak_luminance * + s->num_cols_mastering_display_actual_peak_luminance * 4 : 0) + + // 0-537 bits for per-window tonemapping information + s->num_windows * 1; + for (int w = 0; w < s->num_windows; w++) { + if (s->params[w].tone_mapping_flag) { + size_bits += 28 + s->params[w].num_bezier_curve_anchors * 10; + } + } + // 0-21 bits for per-window color saturation mapping information + size_bits += s->num_windows * 1; + for (int w = 0; w < s->num_windows; w++) { + if (s->params[w].color_saturation_mapping_flag) { + size_bits += 6; + } + } + + size_bytes = (size_bits + 7) / 8; + + buf = av_buffer_alloc(size_bytes); + if (!buf) { + return NULL; + } + + init_put_bits(pb, buf->data, size_bytes); + + // itu_t_t35_country_code shall be 0xB5 (USA) (excluded from the payload) + // itu_t_t35_terminal_provider_code shall be 0x003C + put_bits(pb, 16, 0x003C); + // itu_t_t35_terminal_provider_oriented_code is set to ST 2094-40 + put_bits(pb, 16, 0x0001); + // application_identifier shall be set to 4 + put_bits(pb, 8, 4); + // 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); + return buf; +} diff --git a/libavutil/hdr_dynamic_metadata.h b/libavutil/hdr_dynamic_metadata.h index 1f953ef1f5..797a5c64ae 100644 --- a/libavutil/hdr_dynamic_metadata.h +++ b/libavutil/hdr_dynamic_metadata.h @@ -21,6 +21,7 @@ #ifndef AVUTIL_HDR_DYNAMIC_METADATA_H #define AVUTIL_HDR_DYNAMIC_METADATA_H +#include "buffer.h" #include "frame.h" #include "rational.h" @@ -351,4 +352,14 @@ AVDynamicHDRPlus *av_dynamic_hdr_plus_create_side_data(AVFrame *frame); int av_dynamic_hdr_plus_from_t35(AVDynamicHDRPlus *s, const uint8_t *data, int size); +/** + * Serialize dynamic HDR10+ metadata to a user data registered ITU-T T.35 buffer, + * excluding the country code and beginning with the terminal provider code. + * @param s A pointer containing the decoded AVDynamicHDRPlus structure. + * + * @return Pointer to an AVBufferRef containing the raw ITU-T T.35 representation + * of the HDR10+ metadata if succeed, or NULL if buffer allocation fails. + */ +AVBufferRef *av_dynamic_hdr_plus_to_t35(AVDynamicHDRPlus *s); + #endif /* AVUTIL_HDR_DYNAMIC_METADATA_H */ diff --git a/libavutil/version.h b/libavutil/version.h index 900b798971..7635672985 100644 --- a/libavutil/version.h +++ b/libavutil/version.h @@ -79,7 +79,7 @@ */ #define LIBAVUTIL_VERSION_MAJOR 58 -#define LIBAVUTIL_VERSION_MINOR 3 +#define LIBAVUTIL_VERSION_MINOR 4 #define LIBAVUTIL_VERSION_MICRO 100 #define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \