mirror of https://git.ffmpeg.org/ffmpeg.git
lavc: Add h264_metadata bitstream filter
This is able to modify some header metadata found in the SPS/VUI, and can also add/remove AUDs and insert user data in SEI NAL units. (cherry picked from commit9e93001b61) (cherry picked from commitc42b62d1f9)
This commit is contained in:
Mark Thompson
parent
9c7d70b49b
commit
a308872b04
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@ -2913,6 +2913,7 @@ mpeg4video_parser_select="h263dsp mpegvideo qpeldsp"
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vc1_parser_select="vc1dsp"
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# bitstream_filters
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h264_metadata_bsf_select="cbs_h264"
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mjpeg2jpeg_bsf_select="jpegtables"
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trace_headers_bsf_select="cbs_h264 cbs_h265 cbs_mpeg2"
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@ -92,6 +92,69 @@ When this option is enabled, the long-term headers are removed from the
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bitstream after extraction.
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@end table
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@section h264_metadata
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Modify metadata embedded in an H.264 stream.
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@table @option
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@item aud
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Insert or remove AUD NAL units in all access units of the stream.
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@table @samp
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@item insert
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@item remove
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@end table
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@item sample_aspect_ratio
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Set the sample aspect ratio of the stream in the VUI parameters.
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@item video_format
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@item video_full_range_flag
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Set the video format in the stream (see H.264 section E.2.1 and
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table E-2).
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@item colour_primaries
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@item transfer_characteristics
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@item matrix_coefficients
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Set the colour description in the stream (see H.264 section E.2.1
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and tables E-3, E-4 and E-5).
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@item chroma_sample_loc_type
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Set the chroma sample location in the stream (see H.264 section
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E.2.1 and figure E-1).
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@item tick_rate
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Set the tick rate (num_units_in_tick / time_scale) in the VUI
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parameters. This is the smallest time unit representable in the
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stream, and in many cases represents the field rate of the stream
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(double the frame rate).
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@item fixed_frame_rate_flag
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Set whether the stream has fixed framerate - typically this indicates
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that the framerate is exactly half the tick rate, but the exact
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meaning is dependent on interlacing and the picture structure (see
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H.264 section E.2.1 and table E-6).
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@item crop_left
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@item crop_right
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@item crop_top
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@item crop_bottom
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Set the frame cropping offsets in the SPS. These values will replace
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the current ones if the stream is already cropped.
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These fields are set in pixels. Note that some sizes may not be
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representable if the chroma is subsampled or the stream is interlaced
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(see H.264 section 7.4.2.1.1).
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@item sei_user_data
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Insert a string as SEI unregistered user data. The argument must
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be of the form @emph{UUID+string}, where the UUID is as hex digits
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possibly separated by hyphens, and the string can be anything.
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For example, @samp{086f3693-b7b3-4f2c-9653-21492feee5b8+hello} will
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insert the string ``hello'' associated with the given UUID.
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@end table
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@section h264_mp4toannexb
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Convert an H.264 bitstream from length prefixed mode to start code
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@ -1015,6 +1015,7 @@ OBJS-$(CONFIG_DUMP_EXTRADATA_BSF) += dump_extradata_bsf.o
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OBJS-$(CONFIG_DCA_CORE_BSF) += dca_core_bsf.o
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OBJS-$(CONFIG_EXTRACT_EXTRADATA_BSF) += extract_extradata_bsf.o \
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h2645_parse.o
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OBJS-$(CONFIG_H264_METADATA_BSF) += h264_metadata_bsf.o
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OBJS-$(CONFIG_H264_MP4TOANNEXB_BSF) += h264_mp4toannexb_bsf.o
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OBJS-$(CONFIG_HEVC_MP4TOANNEXB_BSF) += hevc_mp4toannexb_bsf.o
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OBJS-$(CONFIG_IMX_DUMP_HEADER_BSF) += imx_dump_header_bsf.o
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@ -29,6 +29,7 @@ extern const AVBitStreamFilter ff_chomp_bsf;
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extern const AVBitStreamFilter ff_dump_extradata_bsf;
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extern const AVBitStreamFilter ff_dca_core_bsf;
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extern const AVBitStreamFilter ff_extract_extradata_bsf;
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extern const AVBitStreamFilter ff_h264_metadata_bsf;
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extern const AVBitStreamFilter ff_h264_mp4toannexb_bsf;
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extern const AVBitStreamFilter ff_hevc_mp4toannexb_bsf;
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extern const AVBitStreamFilter ff_imx_dump_header_bsf;
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@ -0,0 +1,524 @@
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/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/avstring.h"
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#include "libavutil/common.h"
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#include "libavutil/opt.h"
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#include "bsf.h"
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#include "cbs.h"
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#include "cbs_h264.h"
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#include "h264.h"
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#include "h264_sei.h"
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enum {
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PASS,
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INSERT,
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REMOVE,
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};
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typedef struct H264MetadataContext {
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const AVClass *class;
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CodedBitstreamContext *cbc;
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CodedBitstreamFragment access_unit;
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H264RawAUD aud_nal;
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H264RawSEI sei_nal;
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int aud;
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AVRational sample_aspect_ratio;
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int video_format;
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int video_full_range_flag;
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int colour_primaries;
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int transfer_characteristics;
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int matrix_coefficients;
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int chroma_sample_loc_type;
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AVRational tick_rate;
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int fixed_frame_rate_flag;
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int crop_left;
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int crop_right;
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int crop_top;
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int crop_bottom;
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const char *sei_user_data;
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int sei_first_au;
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} H264MetadataContext;
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static int h264_metadata_update_sps(AVBSFContext *bsf,
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H264RawSPS *sps)
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{
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H264MetadataContext *ctx = bsf->priv_data;
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int need_vui = 0;
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int crop_unit_x, crop_unit_y;
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if (ctx->sample_aspect_ratio.num && ctx->sample_aspect_ratio.den) {
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// Table E-1.
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static const AVRational sar_idc[] = {
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{ 0, 0 }, // Unspecified (never written here).
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{ 1, 1 }, { 12, 11 }, { 10, 11 }, { 16, 11 },
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{ 40, 33 }, { 24, 11 }, { 20, 11 }, { 32, 11 },
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{ 80, 33 }, { 18, 11 }, { 15, 11 }, { 64, 33 },
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{ 160, 99 }, { 4, 3 }, { 3, 2 }, { 2, 1 },
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};
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int num, den, i;
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av_reduce(&num, &den, ctx->sample_aspect_ratio.num,
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ctx->sample_aspect_ratio.den, 65535);
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for (i = 1; i < FF_ARRAY_ELEMS(sar_idc); i++) {
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if (num == sar_idc[i].num &&
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den == sar_idc[i].den)
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break;
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}
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if (i == FF_ARRAY_ELEMS(sar_idc)) {
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sps->vui.aspect_ratio_idc = 255;
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sps->vui.sar_width = num;
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sps->vui.sar_height = den;
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} else {
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sps->vui.aspect_ratio_idc = i;
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}
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sps->vui.aspect_ratio_info_present_flag = 1;
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need_vui = 1;
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}
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#define SET_OR_INFER(field, value, present_flag, infer) do { \
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if (value >= 0) { \
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field = value; \
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need_vui = 1; \
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} else if (!present_flag) \
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field = infer; \
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} while (0)
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if (ctx->video_format >= 0 ||
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ctx->video_full_range_flag >= 0 ||
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ctx->colour_primaries >= 0 ||
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ctx->transfer_characteristics >= 0 ||
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ctx->matrix_coefficients >= 0) {
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SET_OR_INFER(sps->vui.video_format, ctx->video_format,
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sps->vui.video_signal_type_present_flag, 5);
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SET_OR_INFER(sps->vui.video_full_range_flag,
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ctx->video_full_range_flag,
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sps->vui.video_signal_type_present_flag, 0);
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if (ctx->colour_primaries >= 0 ||
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ctx->transfer_characteristics >= 0 ||
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ctx->matrix_coefficients >= 0) {
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SET_OR_INFER(sps->vui.colour_primaries,
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ctx->colour_primaries,
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sps->vui.colour_description_present_flag, 2);
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SET_OR_INFER(sps->vui.transfer_characteristics,
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ctx->transfer_characteristics,
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sps->vui.colour_description_present_flag, 2);
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SET_OR_INFER(sps->vui.matrix_coefficients,
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ctx->matrix_coefficients,
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sps->vui.colour_description_present_flag, 2);
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sps->vui.colour_description_present_flag = 1;
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}
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sps->vui.video_signal_type_present_flag = 1;
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need_vui = 1;
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}
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if (ctx->chroma_sample_loc_type >= 0) {
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sps->vui.chroma_sample_loc_type_top_field =
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ctx->chroma_sample_loc_type;
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sps->vui.chroma_sample_loc_type_bottom_field =
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ctx->chroma_sample_loc_type;
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sps->vui.chroma_loc_info_present_flag = 1;
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need_vui = 1;
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}
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if (ctx->tick_rate.num && ctx->tick_rate.den) {
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int num, den;
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av_reduce(&num, &den, ctx->tick_rate.num, ctx->tick_rate.den,
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UINT32_MAX > INT_MAX ? UINT32_MAX : INT_MAX);
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sps->vui.time_scale = num;
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sps->vui.num_units_in_tick = den;
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sps->vui.timing_info_present_flag = 1;
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need_vui = 1;
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}
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SET_OR_INFER(sps->vui.fixed_frame_rate_flag,
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ctx->fixed_frame_rate_flag,
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sps->vui.timing_info_present_flag, 0);
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if (sps->separate_colour_plane_flag || sps->chroma_format_idc == 0) {
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crop_unit_x = 1;
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crop_unit_y = 2 - sps->frame_mbs_only_flag;
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} else {
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crop_unit_x = 1 + (sps->chroma_format_idc < 3);
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crop_unit_y = (1 + (sps->chroma_format_idc < 2)) *
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(2 - sps->frame_mbs_only_flag);
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}
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#define CROP(border, unit) do { \
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if (ctx->crop_ ## border >= 0) { \
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if (ctx->crop_ ## border % unit != 0) { \
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av_log(bsf, AV_LOG_ERROR, "Invalid value for crop_%s: " \
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"must be a multiple of %d.\n", #border, unit); \
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return AVERROR(EINVAL); \
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} \
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sps->frame_crop_ ## border ## _offset = \
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ctx->crop_ ## border / unit; \
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sps->frame_cropping_flag = 1; \
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} \
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} while (0)
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CROP(left, crop_unit_x);
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CROP(right, crop_unit_x);
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CROP(top, crop_unit_y);
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CROP(bottom, crop_unit_y);
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#undef CROP
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if (need_vui)
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sps->vui_parameters_present_flag = 1;
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return 0;
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}
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static int h264_metadata_filter(AVBSFContext *bsf, AVPacket *out)
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{
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H264MetadataContext *ctx = bsf->priv_data;
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AVPacket *in = NULL;
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CodedBitstreamFragment *au = &ctx->access_unit;
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int err, i, j, has_sps;
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char *sei_udu_string = NULL;
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err = ff_bsf_get_packet(bsf, &in);
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if (err < 0)
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goto fail;
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err = ff_cbs_read_packet(ctx->cbc, au, in);
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if (err < 0) {
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av_log(bsf, AV_LOG_ERROR, "Failed to read packet.\n");
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goto fail;
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}
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if (au->nb_units == 0) {
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av_log(bsf, AV_LOG_ERROR, "No NAL units in packet.\n");
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err = AVERROR_INVALIDDATA;
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goto fail;
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}
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// If an AUD is present, it must be the first NAL unit.
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if (au->units[0].type == H264_NAL_AUD) {
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if (ctx->aud == REMOVE)
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ff_cbs_delete_unit(ctx->cbc, au, 0);
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} else {
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if (ctx->aud == INSERT) {
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static const int primary_pic_type_table[] = {
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0x084, // 2, 7
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0x0a5, // 0, 2, 5, 7
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0x0e7, // 0, 1, 2, 5, 6, 7
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0x210, // 4, 9
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0x318, // 3, 4, 8, 9
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0x294, // 2, 4, 7, 9
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0x3bd, // 0, 2, 3, 4, 5, 7, 8, 9
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0x3ff, // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
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};
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int primary_pic_type_mask = 0xff;
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H264RawAUD *aud = &ctx->aud_nal;
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for (i = 0; i < au->nb_units; i++) {
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if (au->units[i].type == H264_NAL_SLICE ||
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au->units[i].type == H264_NAL_IDR_SLICE) {
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H264RawSlice *slice = au->units[i].content;
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for (j = 0; j < FF_ARRAY_ELEMS(primary_pic_type_table); j++) {
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if (!(primary_pic_type_table[j] &
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(1 << slice->header.slice_type)))
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primary_pic_type_mask &= ~(1 << j);
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}
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}
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}
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for (j = 0; j < FF_ARRAY_ELEMS(primary_pic_type_table); j++)
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if (primary_pic_type_mask & (1 << j))
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break;
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if (j >= FF_ARRAY_ELEMS(primary_pic_type_table)) {
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av_log(bsf, AV_LOG_ERROR, "No usable primary_pic_type: "
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"invalid slice types?\n");
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err = AVERROR_INVALIDDATA;
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goto fail;
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}
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aud->nal_unit_header.nal_unit_type = H264_NAL_AUD;
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aud->primary_pic_type = j;
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err = ff_cbs_insert_unit_content(ctx->cbc, au,
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0, H264_NAL_AUD, aud);
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if (err < 0) {
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av_log(bsf, AV_LOG_ERROR, "Failed to insert AUD.\n");
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goto fail;
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}
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}
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}
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has_sps = 0;
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for (i = 0; i < au->nb_units; i++) {
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if (au->units[i].type == H264_NAL_SPS) {
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err = h264_metadata_update_sps(bsf, au->units[i].content);
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if (err < 0)
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goto fail;
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has_sps = 1;
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}
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}
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// Insert the SEI in access units containing SPSs, and also
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// unconditionally in the first access unit we ever see.
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if (ctx->sei_user_data && (has_sps || !ctx->sei_first_au)) {
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H264RawSEI *sei;
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H264RawSEIPayload *payload;
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H264RawSEIUserDataUnregistered *udu;
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int sei_pos, sei_new;
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ctx->sei_first_au = 1;
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for (i = 0; i < au->nb_units; i++) {
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if (au->units[i].type == H264_NAL_SEI ||
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au->units[i].type == H264_NAL_SLICE ||
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au->units[i].type == H264_NAL_IDR_SLICE)
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break;
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}
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sei_pos = i;
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if (sei_pos < au->nb_units &&
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au->units[sei_pos].type == H264_NAL_SEI) {
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sei_new = 0;
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sei = au->units[sei_pos].content;
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} else {
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sei_new = 1;
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sei = &ctx->sei_nal;
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memset(sei, 0, sizeof(*sei));
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sei->nal_unit_header.nal_unit_type = H264_NAL_SEI;
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err = ff_cbs_insert_unit_content(ctx->cbc, au,
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sei_pos, H264_NAL_SEI, sei);
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if (err < 0) {
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av_log(bsf, AV_LOG_ERROR, "Failed to insert SEI.\n");
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goto fail;
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}
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}
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payload = &sei->payload[sei->payload_count];
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payload->payload_type = H264_SEI_TYPE_USER_DATA_UNREGISTERED;
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udu = &payload->payload.user_data_unregistered;
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for (i = j = 0; j < 32 && ctx->sei_user_data[i]; i++) {
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int c, v;
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c = ctx->sei_user_data[i];
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if (c == '-') {
|
||||
continue;
|
||||
} else if (av_isxdigit(c)) {
|
||||
c = av_tolower(c);
|
||||
v = (c <= '9' ? c - '0' : c - 'a' + 10);
|
||||
} else {
|
||||
goto invalid_user_data;
|
||||
}
|
||||
if (i & 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] == '+') {
|
||||
sei_udu_string = av_strdup(ctx->sei_user_data + i + 1);
|
||||
if (!sei_udu_string) {
|
||||
err = AVERROR(ENOMEM);
|
||||
goto sei_fail;
|
||||
}
|
||||
|
||||
udu->data = sei_udu_string;
|
||||
udu->data_length = strlen(sei_udu_string);
|
||||
|
||||
payload->payload_size = 16 + udu->data_length;
|
||||
|
||||
if (!sei_new) {
|
||||
// This will be freed by the existing internal
|
||||
// reference in fragment_uninit().
|
||||
sei_udu_string = NULL;
|
||||
}
|
||||
|
||||
} else {
|
||||
invalid_user_data:
|
||||
av_log(bsf, AV_LOG_ERROR, "Invalid user data: "
|
||||
"must be \"UUID+string\".\n");
|
||||
err = AVERROR(EINVAL);
|
||||
sei_fail:
|
||||
memset(payload, 0, sizeof(&payload));
|
||||
goto fail;
|
||||
}
|
||||
|
||||
++sei->payload_count;
|
||||
}
|
||||
|
||||
err = ff_cbs_write_packet(ctx->cbc, out, au);
|
||||
if (err < 0) {
|
||||
av_log(bsf, AV_LOG_ERROR, "Failed to write packet.\n");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
err = av_packet_copy_props(out, in);
|
||||
if (err < 0)
|
||||
goto fail;
|
||||
|
||||
err = 0;
|
||||
fail:
|
||||
ff_cbs_fragment_uninit(ctx->cbc, au);
|
||||
av_freep(&sei_udu_string);
|
||||
|
||||
av_packet_free(&in);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int h264_metadata_init(AVBSFContext *bsf)
|
||||
{
|
||||
H264MetadataContext *ctx = bsf->priv_data;
|
||||
CodedBitstreamFragment *au = &ctx->access_unit;
|
||||
int err, i;
|
||||
|
||||
err = ff_cbs_init(&ctx->cbc, AV_CODEC_ID_H264, bsf);
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
if (bsf->par_in->extradata) {
|
||||
err = ff_cbs_read_extradata(ctx->cbc, au, bsf->par_in);
|
||||
if (err < 0) {
|
||||
av_log(bsf, AV_LOG_ERROR, "Failed to read extradata.\n");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
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)
|
||||
goto fail;
|
||||
}
|
||||
}
|
||||
|
||||
err = ff_cbs_write_extradata(ctx->cbc, bsf->par_out, au);
|
||||
if (err < 0) {
|
||||
av_log(bsf, AV_LOG_ERROR, "Failed to write extradata.\n");
|
||||
goto fail;
|
||||
}
|
||||
}
|
||||
|
||||
err = 0;
|
||||
fail:
|
||||
ff_cbs_fragment_uninit(ctx->cbc, au);
|
||||
return err;
|
||||
}
|
||||
|
||||
static void h264_metadata_close(AVBSFContext *bsf)
|
||||
{
|
||||
H264MetadataContext *ctx = bsf->priv_data;
|
||||
ff_cbs_close(&ctx->cbc);
|
||||
}
|
||||
|
||||
#define OFFSET(x) offsetof(H264MetadataContext, x)
|
||||
static const AVOption h264_metadata_options[] = {
|
||||
{ "aud", "Access Unit Delimiter NAL units",
|
||||
OFFSET(aud), AV_OPT_TYPE_INT,
|
||||
{ .i64 = PASS }, PASS, REMOVE, 0, "aud" },
|
||||
{ "pass", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = PASS }, .unit = "aud" },
|
||||
{ "insert", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = INSERT }, .unit = "aud" },
|
||||
{ "remove", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = REMOVE }, .unit = "aud" },
|
||||
|
||||
{ "sample_aspect_ratio", "Set sample aspect ratio (table E-1)",
|
||||
OFFSET(sample_aspect_ratio), AV_OPT_TYPE_RATIONAL,
|
||||
{ .dbl = 0.0 }, 0, 65535 },
|
||||
|
||||
{ "video_format", "Set video format (table E-2)",
|
||||
OFFSET(video_format), AV_OPT_TYPE_INT,
|
||||
{ .i64 = -1 }, -1, 7 },
|
||||
{ "video_full_range_flag", "Set video full range flag",
|
||||
OFFSET(video_full_range_flag), AV_OPT_TYPE_INT,
|
||||
{ .i64 = -1 }, -1, 1 },
|
||||
{ "colour_primaries", "Set colour primaries (table E-3)",
|
||||
OFFSET(colour_primaries), AV_OPT_TYPE_INT,
|
||||
{ .i64 = -1 }, -1, 255 },
|
||||
{ "transfer_characteristics", "Set transfer characteristics (table E-4)",
|
||||
OFFSET(transfer_characteristics), AV_OPT_TYPE_INT,
|
||||
{ .i64 = -1 }, -1, 255 },
|
||||
{ "matrix_coefficients", "Set matrix coefficients (table E-5)",
|
||||
OFFSET(matrix_coefficients), AV_OPT_TYPE_INT,
|
||||
{ .i64 = -1 }, -1, 255 },
|
||||
|
||||
{ "chroma_sample_loc_type", "Set chroma sample location type (figure E-1)",
|
||||
OFFSET(chroma_sample_loc_type), AV_OPT_TYPE_INT,
|
||||
{ .i64 = -1 }, -1, 6 },
|
||||
|
||||
{ "tick_rate", "Set VUI tick rate (num_units_in_tick / time_scale)",
|
||||
OFFSET(tick_rate), AV_OPT_TYPE_RATIONAL,
|
||||
{ .dbl = 0.0 }, 0, UINT_MAX },
|
||||
{ "fixed_frame_rate_flag", "Set VUI fixed frame rate flag",
|
||||
OFFSET(fixed_frame_rate_flag), AV_OPT_TYPE_INT,
|
||||
{ .i64 = -1 }, -1, 1 },
|
||||
|
||||
{ "crop_left", "Set left border crop offset",
|
||||
OFFSET(crop_left), AV_OPT_TYPE_INT,
|
||||
{ .i64 = -1 }, -1, H264_MAX_WIDTH },
|
||||
{ "crop_right", "Set right border crop offset",
|
||||
OFFSET(crop_right), AV_OPT_TYPE_INT,
|
||||
{ .i64 = -1 }, -1, H264_MAX_WIDTH },
|
||||
{ "crop_top", "Set top border crop offset",
|
||||
OFFSET(crop_top), AV_OPT_TYPE_INT,
|
||||
{ .i64 = -1 }, -1, H264_MAX_HEIGHT },
|
||||
{ "crop_bottom", "Set bottom border crop offset",
|
||||
OFFSET(crop_bottom), AV_OPT_TYPE_INT,
|
||||
{ .i64 = -1 }, -1, H264_MAX_HEIGHT },
|
||||
|
||||
{ "sei_user_data", "Insert SEI user data (UUID+string)",
|
||||
OFFSET(sei_user_data), AV_OPT_TYPE_STRING, { .str = NULL } },
|
||||
|
||||
{ NULL }
|
||||
};
|
||||
|
||||
static const AVClass h264_metadata_class = {
|
||||
.class_name = "h264_metadata_bsf",
|
||||
.item_name = av_default_item_name,
|
||||
.option = h264_metadata_options,
|
||||
.version = LIBAVCODEC_VERSION_MAJOR,
|
||||
};
|
||||
|
||||
static const enum AVCodecID h264_metadata_codec_ids[] = {
|
||||
AV_CODEC_ID_H264, AV_CODEC_ID_NONE,
|
||||
};
|
||||
|
||||
const AVBitStreamFilter ff_h264_metadata_bsf = {
|
||||
.name = "h264_metadata",
|
||||
.priv_data_size = sizeof(H264MetadataContext),
|
||||
.priv_class = &h264_metadata_class,
|
||||
.init = &h264_metadata_init,
|
||||
.close = &h264_metadata_close,
|
||||
.filter = &h264_metadata_filter,
|
||||
.codec_ids = h264_metadata_codec_ids,
|
||||
};
|
||||
Loading…
Reference in New Issue