lavc: move bitstream filters into bsf/ subdir

1 files changed, 723 insertions, 0 deletions

diff --git a/libavcodec/bsf/h264_metadata.c b/libavcodec/bsf/h264_metadata.c
new file mode 100644
index 0000000000..39b9e8eee4
--- /dev/null
+++ b/libavcodec/bsf/h264_metadata.c
@@ -0,0 +1,723 @@
+/*
+ * 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 "libavutil/avstring.h"
+#include "libavutil/display.h"
+#include "libavutil/common.h"
+#include "libavutil/opt.h"
+
+#include "bsf.h"
+#include "bsf_internal.h"
+#include "cbs.h"
+#include "cbs_bsf.h"
+#include "cbs_h264.h"
+#include "cbs_sei.h"
+#include "h264.h"
+#include "h264_levels.h"
+#include "h2645data.h"
+#include "sei.h"
+
+enum {
+    FLIP_HORIZONTAL = 1,
+    FLIP_VERTICAL   = 2,
+};
+
+enum {
+    LEVEL_UNSET = -2,
+    LEVEL_AUTO  = -1,
+};
+
+typedef struct H264MetadataContext {
+    CBSBSFContext common;
+
+    int done_first_au;
+
+    int aud;
+    H264RawAUD aud_nal;
+
+    AVRational sample_aspect_ratio;
+
+    int overscan_appropriate_flag;
+
+    int video_format;
+    int video_full_range_flag;
+    int colour_primaries;
+    int transfer_characteristics;
+    int matrix_coefficients;
+
+    int chroma_sample_loc_type;
+
+    AVRational tick_rate;
+    int fixed_frame_rate_flag;
+    int zero_new_constraint_set_flags;
+
+    int crop_left;
+    int crop_right;
+    int crop_top;
+    int crop_bottom;
+
+    const char *sei_user_data;
+    SEIRawUserDataUnregistered sei_user_data_payload;
+
+    int delete_filler;
+
+    int display_orientation;
+    double rotate;
+    int flip;
+    H264RawSEIDisplayOrientation display_orientation_payload;
+
+    int level;
+} H264MetadataContext;
+
+
+static int h264_metadata_insert_aud(AVBSFContext *bsf,
+                                    CodedBitstreamFragment *au)
+{
+    H264MetadataContext *ctx = bsf->priv_data;
+    int primary_pic_type_mask = 0xff;
+    int err, i, j;
+
+    static const int primary_pic_type_table[] = {
+        0x084, // 2, 7
+        0x0a5, // 0, 2, 5, 7
+        0x0e7, // 0, 1, 2, 5, 6, 7
+        0x210, // 4, 9
+        0x318, // 3, 4, 8, 9
+        0x294, // 2, 4, 7, 9
+        0x3bd, // 0, 2, 3, 4, 5, 7, 8, 9
+        0x3ff, // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
+    };
+
+    for (i = 0; i < au->nb_units; i++) {
+        if (au->units[i].type == H264_NAL_SLICE ||
+            au->units[i].type == H264_NAL_IDR_SLICE) {
+            H264RawSlice *slice = au->units[i].content;
+            for (j = 0; j < FF_ARRAY_ELEMS(primary_pic_type_table); j++) {
+                if (!(primary_pic_type_table[j] &
+                      (1 << slice->header.slice_type)))
+                    primary_pic_type_mask &= ~(1 << j);
+            }
+        }
+    }
+    for (j = 0; j < FF_ARRAY_ELEMS(primary_pic_type_table); j++)
+        if (primary_pic_type_mask & (1 << j))
+            break;
+    if (j >= FF_ARRAY_ELEMS(primary_pic_type_table)) {
+        av_log(bsf, AV_LOG_ERROR, "No usable primary_pic_type: "
+               "invalid slice types?\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    ctx->aud_nal = (H264RawAUD) {
+        .nal_unit_header.nal_unit_type = H264_NAL_AUD,
+        .primary_pic_type = j,
+    };
+
+    err = ff_cbs_insert_unit_content(au, 0, H264_NAL_AUD,
+                                     &ctx->aud_nal, NULL);
+    if (err < 0) {
+        av_log(bsf, AV_LOG_ERROR, "Failed to insert AUD.\n");
+        return err;
+    }
+
+    return 0;
+}
+
+static int h264_metadata_update_sps(AVBSFContext *bsf,
+                                    H264RawSPS *sps)
+{
+    H264MetadataContext *ctx = bsf->priv_data;
+    int need_vui = 0;
+    int crop_unit_x, crop_unit_y;
+
+    if (ctx->sample_aspect_ratio.num && ctx->sample_aspect_ratio.den) {
+        int num, den, i;
+
+        av_reduce(&num, &den, ctx->sample_aspect_ratio.num,
+                  ctx->sample_aspect_ratio.den, 65535);
+
+        for (i = 1; i < FF_ARRAY_ELEMS(ff_h2645_pixel_aspect); i++) {
+            if (num == ff_h2645_pixel_aspect[i].num &&
+                den == ff_h2645_pixel_aspect[i].den)
+                break;
+        }
+        if (i == FF_ARRAY_ELEMS(ff_h2645_pixel_aspect)) {
+            sps->vui.aspect_ratio_idc = 255;
+            sps->vui.sar_width  = num;
+            sps->vui.sar_height = den;
+        } else {
+            sps->vui.aspect_ratio_idc = i;
+        }
+        sps->vui.aspect_ratio_info_present_flag = 1;
+        need_vui = 1;
+    }
+
+#define SET_VUI_FIELD(field) do { \
+        if (ctx->field >= 0) { \
+            sps->vui.field = ctx->field; \
+            need_vui = 1; \
+        } \
+    } while (0)
+
+    if (ctx->overscan_appropriate_flag >= 0) {
+        SET_VUI_FIELD(overscan_appropriate_flag);
+        sps->vui.overscan_info_present_flag = 1;
+    }
+
+    if (ctx->video_format             >= 0 ||
+        ctx->video_full_range_flag    >= 0 ||
+        ctx->colour_primaries         >= 0 ||
+        ctx->transfer_characteristics >= 0 ||
+        ctx->matrix_coefficients      >= 0) {
+
+        SET_VUI_FIELD(video_format);
+
+        SET_VUI_FIELD(video_full_range_flag);
+
+        if (ctx->colour_primaries         >= 0 ||
+            ctx->transfer_characteristics >= 0 ||
+            ctx->matrix_coefficients      >= 0) {
+
+            SET_VUI_FIELD(colour_primaries);
+            SET_VUI_FIELD(transfer_characteristics);
+            SET_VUI_FIELD(matrix_coefficients);
+
+            sps->vui.colour_description_present_flag = 1;
+        }
+        sps->vui.video_signal_type_present_flag = 1;
+    }
+
+    if (ctx->chroma_sample_loc_type >= 0) {
+        sps->vui.chroma_sample_loc_type_top_field =
+            ctx->chroma_sample_loc_type;
+        sps->vui.chroma_sample_loc_type_bottom_field =
+            ctx->chroma_sample_loc_type;
+        sps->vui.chroma_loc_info_present_flag = 1;
+        need_vui = 1;
+    }
+
+    if (ctx->tick_rate.num && ctx->tick_rate.den) {
+        int num, den;
+
+        av_reduce(&num, &den, ctx->tick_rate.num, ctx->tick_rate.den,
+                  UINT32_MAX > INT_MAX ? UINT32_MAX : INT_MAX);
+
+        sps->vui.time_scale        = num;
+        sps->vui.num_units_in_tick = den;
+
+        sps->vui.timing_info_present_flag = 1;
+        need_vui = 1;
+    }
+    SET_VUI_FIELD(fixed_frame_rate_flag);
+    if (ctx->zero_new_constraint_set_flags) {
+        sps->constraint_set4_flag = 0;
+        sps->constraint_set5_flag = 0;
+    }
+
+    if (sps->separate_colour_plane_flag || sps->chroma_format_idc == 0) {
+        crop_unit_x = 1;
+        crop_unit_y = 2 - sps->frame_mbs_only_flag;
+    } else {
+        crop_unit_x = 1 + (sps->chroma_format_idc < 3);
+        crop_unit_y = (1 + (sps->chroma_format_idc < 2)) *
+                       (2 - sps->frame_mbs_only_flag);
+    }
+#define CROP(border, unit) do { \
+        if (ctx->crop_ ## border >= 0) { \
+            if (ctx->crop_ ## border % unit != 0) { \
+                av_log(bsf, AV_LOG_ERROR, "Invalid value for crop_%s: " \
+                       "must be a multiple of %d.\n", #border, unit); \
+                return AVERROR(EINVAL); \
+            } \
+            sps->frame_crop_ ## border ## _offset = \
+                  ctx->crop_ ## border / unit; \
+            sps->frame_cropping_flag = 1; \
+        } \
+    } while (0)
+    CROP(left,   crop_unit_x);
+    CROP(right,  crop_unit_x);
+    CROP(top,    crop_unit_y);
+    CROP(bottom, crop_unit_y);
+#undef CROP
+
+    if (ctx->level != LEVEL_UNSET) {
+        int level_idc;
+
+        if (ctx->level == LEVEL_AUTO) {
+            const H264LevelDescriptor *desc;
+            int64_t bit_rate;
+            int width, height, dpb_frames;
+            int framerate;
+
+            if (sps->vui.nal_hrd_parameters_present_flag) {
+                bit_rate = (sps->vui.nal_hrd_parameters.bit_rate_value_minus1[0] + 1) *
+                    (INT64_C(1) << (sps->vui.nal_hrd_parameters.bit_rate_scale + 6));
+            } else if (sps->vui.vcl_hrd_parameters_present_flag) {
+                bit_rate = (sps->vui.vcl_hrd_parameters.bit_rate_value_minus1[0] + 1) *
+                    (INT64_C(1) << (sps->vui.vcl_hrd_parameters.bit_rate_scale + 6));
+                // Adjust for VCL vs. NAL limits.
+                bit_rate = bit_rate * 6 / 5;
+            } else {
+                bit_rate = 0;
+            }
+
+            // Don't use max_dec_frame_buffering if it is only inferred.
+            dpb_frames = sps->vui.bitstream_restriction_flag ?
+                sps->vui.max_dec_frame_buffering : H264_MAX_DPB_FRAMES;
+
+            width  = 16 * (sps->pic_width_in_mbs_minus1 + 1);
+            height = 16 * (sps->pic_height_in_map_units_minus1 + 1) *
+                (2 - sps->frame_mbs_only_flag);
+
+            if (sps->vui.timing_info_present_flag)
+                framerate = sps->vui.time_scale / sps->vui.num_units_in_tick / 2;
+            else
+                framerate = 0;
+
+            desc = ff_h264_guess_level(sps->profile_idc, bit_rate, framerate,
+                                       width, height, dpb_frames);
+            if (desc) {
+                level_idc = desc->level_idc;
+            } else {
+                av_log(bsf, AV_LOG_WARNING, "Stream does not appear to "
+                       "conform to any level: using level 6.2.\n");
+                level_idc = 62;
+            }
+        } else {
+            level_idc = ctx->level;
+        }
+
+        if (level_idc == 9) {
+            if (sps->profile_idc == 66 ||
+                sps->profile_idc == 77 ||
+                sps->profile_idc == 88) {
+                sps->level_idc = 11;
+                sps->constraint_set3_flag = 1;
+            } else {
+                sps->level_idc = 9;
+            }
+        } else {
+            sps->level_idc = level_idc;
+        }
+    }
+
+    if (need_vui)
+        sps->vui_parameters_present_flag = 1;
+
+    return 0;
+}
+
+static int h264_metadata_handle_display_orientation(AVBSFContext *bsf,
+                                                    AVPacket *pkt,
+                                                    CodedBitstreamFragment *au,
+                                                    int seek_point)
+{
+    H264MetadataContext *ctx = bsf->priv_data;
+    SEIRawMessage *message;
+    int err;
+
+    message = NULL;
+    while (ff_cbs_sei_find_message(ctx->common.output, au,
+                                   SEI_TYPE_DISPLAY_ORIENTATION,
+                                   &message) == 0) {
+        H264RawSEIDisplayOrientation *disp = message->payload;
+        double angle = disp->anticlockwise_rotation * 180.0 / 65536.0;
+        int32_t *matrix;
+
+        matrix = av_malloc(9 * sizeof(int32_t));
+        if (!matrix)
+            return AVERROR(ENOMEM);
+
+        /* av_display_rotation_set() expects the angle in the clockwise
+         * direction, hence the first minus.
+         * The below code applies the flips after the rotation, yet
+         * the H.2645 specs require flipping to be applied first.
+         * Because of R O(phi) = O(-phi) R (where R is flipping around
+         * an arbitatry axis and O(phi) is the proper rotation by phi)
+         * we can create display matrices as desired by negating
+         * the degree once for every flip applied. */
+        angle = -angle * (1 - 2 * !!disp->hor_flip) * (1 - 2 * !!disp->ver_flip);
+
+        av_display_rotation_set(matrix, angle);
+        av_display_matrix_flip(matrix, disp->hor_flip, disp->ver_flip);
+
+        // If there are multiple display orientation messages in an
+        // access unit, then the last one added to the packet (i.e.
+        // the first one in the access unit) will prevail.
+        err = av_packet_add_side_data(pkt, AV_PKT_DATA_DISPLAYMATRIX,
+                                      (uint8_t*)matrix,
+                                      9 * sizeof(int32_t));
+        if (err < 0) {
+            av_log(bsf, AV_LOG_ERROR, "Failed to attach extracted "
+                   "displaymatrix side data to packet.\n");
+            av_free(matrix);
+            return AVERROR(ENOMEM);
+        }
+    }
+
+    if (ctx->display_orientation == BSF_ELEMENT_REMOVE ||
+        ctx->display_orientation == BSF_ELEMENT_INSERT) {
+        ff_cbs_sei_delete_message_type(ctx->common.output, au,
+                                       SEI_TYPE_DISPLAY_ORIENTATION);
+    }
+
+    if (ctx->display_orientation == BSF_ELEMENT_INSERT) {
+        H264RawSEIDisplayOrientation *disp =
+            &ctx->display_orientation_payload;
+        uint8_t *data;
+        size_t size;
+        int write = 0;
+
+        data = av_packet_get_side_data(pkt, AV_PKT_DATA_DISPLAYMATRIX, &size);
+        if (data && size >= 9 * sizeof(int32_t)) {
+            int32_t matrix[9];
+            double dmatrix[9];
+            int hflip, vflip, i;
+            double scale_x, scale_y, angle;
+
+            memcpy(matrix, data, sizeof(matrix));
+
+            for (i = 0; i < 9; i++)
+                dmatrix[i] = matrix[i] / 65536.0;
+
+            // Extract scale factors.
+            scale_x = hypot(dmatrix[0], dmatrix[3]);
+            scale_y = hypot(dmatrix[1], dmatrix[4]);
+
+            // Select flips to make the main diagonal positive.
+            hflip = dmatrix[0] < 0.0;
+            vflip = dmatrix[4] < 0.0;
+            if (hflip)
+                scale_x = -scale_x;
+            if (vflip)
+                scale_y = -scale_y;
+
+            // Rescale.
+            for (i = 0; i < 9; i += 3) {
+                dmatrix[i]     /= scale_x;
+                dmatrix[i + 1] /= scale_y;
+            }
+
+            // Extract rotation.
+            angle = atan2(dmatrix[3], dmatrix[0]);
+
+            if (!(angle >= -M_PI && angle <= M_PI) ||
+                matrix[2] != 0.0 || matrix[5] != 0.0 ||
+                matrix[6] != 0.0 || matrix[7] != 0.0) {
+                av_log(bsf, AV_LOG_WARNING, "Input display matrix is not "
+                       "representable in H.264 parameters.\n");
+            } else {
+                disp->hor_flip = hflip;
+                disp->ver_flip = vflip;
+                disp->anticlockwise_rotation =
+                    (uint16_t)rint((angle >= 0.0 ? angle
+                                                 : angle + 2 * M_PI) *
+                                   32768.0 / M_PI);
+                write = 1;
+            }
+        }
+
+        if (seek_point) {
+            if (!isnan(ctx->rotate)) {
+                disp->anticlockwise_rotation =
+                    (uint16_t)rint((ctx->rotate >= 0.0 ? ctx->rotate
+                                                       : ctx->rotate + 360.0) *
+                                   65536.0 / 360.0);
+                write = 1;
+            }
+            if (ctx->flip) {
+                disp->hor_flip = !!(ctx->flip & FLIP_HORIZONTAL);
+                disp->ver_flip = !!(ctx->flip & FLIP_VERTICAL);
+                write = 1;
+            }
+        }
+
+        if (write) {
+            disp->display_orientation_repetition_period = 1;
+
+            err = ff_cbs_sei_add_message(ctx->common.output, au, 1,
+                                         SEI_TYPE_DISPLAY_ORIENTATION,
+                                         disp, NULL);
+            if (err < 0) {
+                av_log(bsf, AV_LOG_ERROR, "Failed to add display orientation "
+                       "SEI message to access unit.\n");
+                return err;
+            }
+        }
+    }
+
+    return 0;
+}
+
+static int h264_metadata_update_fragment(AVBSFContext *bsf, AVPacket *pkt,
+                                         CodedBitstreamFragment *au)
+{
+    H264MetadataContext *ctx = bsf->priv_data;
+    int err, i, has_sps, seek_point;
+
+    if (ctx->aud == BSF_ELEMENT_REMOVE) {
+        for (i = au->nb_units - 1; i >= 0; i--) {
+            if (au->units[i].type == H264_NAL_AUD)
+                ff_cbs_delete_unit(au, i);
+        }
+    } else if (ctx->aud == BSF_ELEMENT_INSERT) {
+        if (pkt) {
+            err = h264_metadata_insert_aud(bsf, au);
+            if (err < 0)
+                return err;
+        }
+    }
+
+    has_sps = 0;
+    for (i = 0; i < au->nb_units; i++) {
+        if (au->units[i].type == H264_NAL_SPS) {
+            err = h264_metadata_update_sps(bsf, au->units[i].content);
+            if (err < 0)
+                return err;
+            has_sps = 1;
+        }
+    }
+
+    if (pkt) {
+        // The current packet should be treated as a seek point for metadata
+        // insertion if any of:
+        // - It is the first packet in the stream.
+        // - It contains an SPS, indicating that a sequence might start here.
+        // - It is marked as containing a key frame.
+        seek_point = !ctx->done_first_au || has_sps ||
+            (pkt->flags & AV_PKT_FLAG_KEY);
+    } else {
+        seek_point = 0;
+    }
+
+    if (ctx->sei_user_data && seek_point) {
+        err = ff_cbs_sei_add_message(ctx->common.output, au, 1,
+                                     SEI_TYPE_USER_DATA_UNREGISTERED,
+                                     &ctx->sei_user_data_payload, NULL);
+        if (err < 0) {
+            av_log(bsf, AV_LOG_ERROR, "Failed to add user data SEI "
+                   "message to access unit.\n");
+            return err;
+        }
+    }
+
+    if (ctx->delete_filler) {
+        for (i = au->nb_units - 1; i >= 0; i--) {
+            if (au->units[i].type == H264_NAL_FILLER_DATA) {
+                ff_cbs_delete_unit(au, i);
+                continue;
+            }
+        }
+
+        ff_cbs_sei_delete_message_type(ctx->common.output, au,
+                                       SEI_TYPE_FILLER_PAYLOAD);
+    }
+
+    if (pkt && ctx->display_orientation != BSF_ELEMENT_PASS) {
+        err = h264_metadata_handle_display_orientation(bsf, pkt, au,
+                                                       seek_point);
+        if (err < 0)
+            return err;
+    }
+
+    if (pkt)
+        ctx->done_first_au = 1;
+
+    return 0;
+}
+
+static const CBSBSFType h264_metadata_type = {
+    .codec_id        = AV_CODEC_ID_H264,
+    .fragment_name   = "access unit",
+    .unit_name       = "NAL unit",
+    .update_fragment = &h264_metadata_update_fragment,
+};
+
+static int h264_metadata_init(AVBSFContext *bsf)
+{
+    H264MetadataContext *ctx = bsf->priv_data;
+
+    if (ctx->sei_user_data) {
+        SEIRawUserDataUnregistered *udu = &ctx->sei_user_data_payload;
+        int i, j;
+
+        // Parse UUID.  It must be a hex string of length 32, possibly
+        // containing '-'s between hex digits (which we ignore).
+        for (i = j = 0; j < 32 && i < 64 && ctx->sei_user_data[i]; i++) {
+            int c, v;
+            c = ctx->sei_user_data[i];
+            if (c == '-') {
+                continue;
+            } else if (av_isxdigit(c)) {
+                c = av_tolower(c);
+                v = (c <= '9' ? c - '0' : c - 'a' + 10);
+            } else {
+                break;
+            }
+            if (j & 1)
+                udu->uuid_iso_iec_11578[j / 2] |= v;
+            else
+                udu->uuid_iso_iec_11578[j / 2] = v << 4;
+            ++j;
+        }
+        if (j == 32 && ctx->sei_user_data[i] == '+') {
+            udu->data = (uint8_t*)ctx->sei_user_data + i + 1;
+            udu->data_length = strlen(udu->data) + 1;
+        } else {
+            av_log(bsf, AV_LOG_ERROR, "Invalid user data: "
+                   "must be \"UUID+string\".\n");
+            return AVERROR(EINVAL);
+        }
+    }
+
+    return ff_cbs_bsf_generic_init(bsf, &h264_metadata_type);
+}
+
+#define OFFSET(x) offsetof(H264MetadataContext, x)
+#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
+static const AVOption h264_metadata_options[] = {
+    BSF_ELEMENT_OPTIONS_PIR("aud", "Access Unit Delimiter NAL units",
+                            aud, FLAGS),
+
+    { "sample_aspect_ratio", "Set sample aspect ratio (table E-1)",
+        OFFSET(sample_aspect_ratio), AV_OPT_TYPE_RATIONAL,
+        { .dbl = 0.0 }, 0, 65535, FLAGS },
+
+    { "overscan_appropriate_flag", "Set VUI overscan appropriate flag",
+        OFFSET(overscan_appropriate_flag), AV_OPT_TYPE_INT,
+        { .i64 = -1 }, -1, 1, FLAGS },
+
+    { "video_format", "Set video format (table E-2)",
+        OFFSET(video_format), AV_OPT_TYPE_INT,
+        { .i64 = -1 }, -1, 7, FLAGS},
+    { "video_full_range_flag", "Set video full range flag",
+        OFFSET(video_full_range_flag), AV_OPT_TYPE_INT,
+        { .i64 = -1 }, -1, 1, FLAGS },
+    { "colour_primaries", "Set colour primaries (table E-3)",
+        OFFSET(colour_primaries), AV_OPT_TYPE_INT,
+        { .i64 = -1 }, -1, 255, FLAGS },
+    { "transfer_characteristics", "Set transfer characteristics (table E-4)",
+        OFFSET(transfer_characteristics), AV_OPT_TYPE_INT,
+        { .i64 = -1 }, -1, 255, FLAGS },
+    { "matrix_coefficients", "Set matrix coefficients (table E-5)",
+        OFFSET(matrix_coefficients), AV_OPT_TYPE_INT,
+        { .i64 = -1 }, -1, 255, FLAGS },
+
+    { "chroma_sample_loc_type", "Set chroma sample location type (figure E-1)",
+        OFFSET(chroma_sample_loc_type), AV_OPT_TYPE_INT,
+        { .i64 = -1 }, -1, 5, FLAGS },
+
+    { "tick_rate", "Set VUI tick rate (time_scale / num_units_in_tick)",
+        OFFSET(tick_rate), AV_OPT_TYPE_RATIONAL,
+        { .dbl = 0.0 }, 0, UINT_MAX, FLAGS },
+    { "fixed_frame_rate_flag", "Set VUI fixed frame rate flag",
+        OFFSET(fixed_frame_rate_flag), AV_OPT_TYPE_INT,
+        { .i64 = -1 }, -1, 1, FLAGS },
+    { "zero_new_constraint_set_flags", "Set constraint_set4_flag / constraint_set5_flag to zero",
+        OFFSET(zero_new_constraint_set_flags), AV_OPT_TYPE_BOOL,
+        { .i64 = 0 }, 0, 1, FLAGS },
+
+    { "crop_left", "Set left border crop offset",
+        OFFSET(crop_left), AV_OPT_TYPE_INT,
+        { .i64 = -1 }, -1, H264_MAX_WIDTH, FLAGS },
+    { "crop_right", "Set right border crop offset",
+        OFFSET(crop_right), AV_OPT_TYPE_INT,
+        { .i64 = -1 }, -1, H264_MAX_WIDTH, FLAGS },
+    { "crop_top", "Set top border crop offset",
+        OFFSET(crop_top), AV_OPT_TYPE_INT,
+        { .i64 = -1 }, -1, H264_MAX_HEIGHT, FLAGS },
+    { "crop_bottom", "Set bottom border crop offset",
+        OFFSET(crop_bottom), AV_OPT_TYPE_INT,
+        { .i64 = -1 }, -1, H264_MAX_HEIGHT, FLAGS },
+
+    { "sei_user_data", "Insert SEI user data (UUID+string)",
+        OFFSET(sei_user_data), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = FLAGS },
+
+    { "delete_filler", "Delete all filler (both NAL and SEI)",
+        OFFSET(delete_filler), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, FLAGS},
+
+    BSF_ELEMENT_OPTIONS_PIRE("display_orientation",
+                             "Display orientation SEI",
+                             display_orientation, FLAGS),
+
+    { "rotate", "Set rotation in display orientation SEI (anticlockwise angle in degrees)",
+        OFFSET(rotate), AV_OPT_TYPE_DOUBLE,
+        { .dbl = NAN }, -360.0, +360.0, FLAGS },
+    { "flip", "Set flip in display orientation SEI",
+        OFFSET(flip), AV_OPT_TYPE_FLAGS,
+        { .i64 = 0 }, 0, FLIP_HORIZONTAL | FLIP_VERTICAL, FLAGS, "flip" },
+    { "horizontal", "Set hor_flip",
+        0, AV_OPT_TYPE_CONST,
+        { .i64 = FLIP_HORIZONTAL }, .flags = FLAGS, .unit = "flip" },
+    { "vertical",   "Set ver_flip",
+        0, AV_OPT_TYPE_CONST,
+        { .i64 = FLIP_VERTICAL },   .flags = FLAGS, .unit = "flip" },
+
+    { "level", "Set level (table A-1)",
+        OFFSET(level), AV_OPT_TYPE_INT,
+        { .i64 = LEVEL_UNSET }, LEVEL_UNSET, 0xff, FLAGS, "level" },
+    { "auto", "Attempt to guess level from stream properties",
+        0, AV_OPT_TYPE_CONST,
+        { .i64 = LEVEL_AUTO }, .flags = FLAGS, .unit = "level" },
+#define LEVEL(name, value) name, NULL, 0, AV_OPT_TYPE_CONST, \
+        { .i64 = value },      .flags = FLAGS, .unit = "level"
+    { LEVEL("1",   10) },
+    { LEVEL("1b",   9) },
+    { LEVEL("1.1", 11) },
+    { LEVEL("1.2", 12) },
+    { LEVEL("1.3", 13) },
+    { LEVEL("2",   20) },
+    { LEVEL("2.1", 21) },
+    { LEVEL("2.2", 22) },
+    { LEVEL("3",   30) },
+    { LEVEL("3.1", 31) },
+    { LEVEL("3.2", 32) },
+    { LEVEL("4",   40) },
+    { LEVEL("4.1", 41) },
+    { LEVEL("4.2", 42) },
+    { LEVEL("5",   50) },
+    { LEVEL("5.1", 51) },
+    { LEVEL("5.2", 52) },
+    { LEVEL("6",   60) },
+    { LEVEL("6.1", 61) },
+    { LEVEL("6.2", 62) },
+#undef LEVEL
+
+    { NULL }
+};
+
+static const AVClass h264_metadata_class = {
+    .class_name = "h264_metadata_bsf",
+    .item_name  = av_default_item_name,
+    .option     = h264_metadata_options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+static const enum AVCodecID h264_metadata_codec_ids[] = {
+    AV_CODEC_ID_H264, AV_CODEC_ID_NONE,
+};
+
+const FFBitStreamFilter ff_h264_metadata_bsf = {
+    .p.name         = "h264_metadata",
+    .p.codec_ids    = h264_metadata_codec_ids,
+    .p.priv_class   = &h264_metadata_class,
+    .priv_data_size = sizeof(H264MetadataContext),
+    .init           = &h264_metadata_init,
+    .close          = &ff_cbs_bsf_generic_close,
+    .filter         = &ff_cbs_bsf_generic_filter,
+};