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FFmpeg/libavcodec/h265_metadata_bsf.c

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/*
* 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/common.h"
#include "libavutil/opt.h"
#include "bsf.h"
#include "cbs.h"
#include "cbs_bsf.h"
#include "cbs_h265.h"
#include "hevc.h"
#include "h265_profile_level.h"
enum {
LEVEL_UNSET = -2,
LEVEL_AUTO = -1,
};
typedef struct H265MetadataContext {
CBSBSFContext common;
H265RawAUD aud_nal;
int aud;
AVRational sample_aspect_ratio;
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 poc_proportional_to_timing_flag;
int num_ticks_poc_diff_one;
int crop_left;
int crop_right;
int crop_top;
int crop_bottom;
int level;
int level_guess;
int level_warned;
} H265MetadataContext;
static void h265_metadata_guess_level(AVBSFContext *bsf,
const CodedBitstreamFragment *au)
{
H265MetadataContext *ctx = bsf->priv_data;
const H265LevelDescriptor *desc;
const H265RawProfileTierLevel *ptl = NULL;
const H265RawHRDParameters *hrd = NULL;
int64_t bit_rate = 0;
int width = 0, height = 0;
int tile_cols = 0, tile_rows = 0;
int max_dec_pic_buffering = 0;
int i;
for (i = 0; i < au->nb_units; i++) {
const CodedBitstreamUnit *unit = &au->units[i];
if (unit->type == HEVC_NAL_VPS) {
const H265RawVPS *vps = unit->content;
ptl = &vps->profile_tier_level;
max_dec_pic_buffering = vps->vps_max_dec_pic_buffering_minus1[0] + 1;
if (vps->vps_num_hrd_parameters > 0)
hrd = &vps->hrd_parameters[0];
} else if (unit->type == HEVC_NAL_SPS) {
const H265RawSPS *sps = unit->content;
ptl = &sps->profile_tier_level;
max_dec_pic_buffering = sps->sps_max_dec_pic_buffering_minus1[0] + 1;
width = sps->pic_width_in_luma_samples;
height = sps->pic_height_in_luma_samples;
if (sps->vui.vui_hrd_parameters_present_flag)
hrd = &sps->vui.hrd_parameters;
} else if (unit->type == HEVC_NAL_PPS) {
const H265RawPPS *pps = unit->content;
if (pps->tiles_enabled_flag) {
tile_cols = pps->num_tile_columns_minus1 + 1;
tile_rows = pps->num_tile_rows_minus1 + 1;
}
}
}
if (hrd) {
if (hrd->nal_hrd_parameters_present_flag) {
bit_rate = (hrd->nal_sub_layer_hrd_parameters[0].bit_rate_value_minus1[0] + 1) *
(INT64_C(1) << hrd->bit_rate_scale + 6);
} else if (hrd->vcl_hrd_parameters_present_flag) {
bit_rate = (hrd->vcl_sub_layer_hrd_parameters[0].bit_rate_value_minus1[0] + 1) *
(INT64_C(1) << hrd->bit_rate_scale + 6);
// Adjust for VCL vs. NAL limits.
bit_rate = bit_rate * 11 / 10;
}
}
desc = ff_h265_guess_level(ptl, bit_rate, width, height,
0, tile_rows, tile_cols,
max_dec_pic_buffering);
if (desc) {
av_log(bsf, AV_LOG_DEBUG, "Stream appears to conform to "
"level %s.\n", desc->name);
ctx->level_guess = desc->level_idc;
}
}
static void h265_metadata_update_level(AVBSFContext *bsf,
uint8_t *level_idc)
{
H265MetadataContext *ctx = bsf->priv_data;
if (ctx->level != LEVEL_UNSET) {
if (ctx->level == LEVEL_AUTO) {
if (ctx->level_guess) {
*level_idc = ctx->level_guess;
} else {
if (!ctx->level_warned) {
av_log(bsf, AV_LOG_WARNING, "Unable to determine level "
"of stream: using level 8.5.\n");
ctx->level_warned = 1;
}
*level_idc = 255;
}
} else {
*level_idc = ctx->level;
}
}
}
static int h265_metadata_update_vps(AVBSFContext *bsf,
H265RawVPS *vps)
{
H265MetadataContext *ctx = bsf->priv_data;
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);
vps->vps_time_scale = num;
vps->vps_num_units_in_tick = den;
vps->vps_timing_info_present_flag = 1;
if (ctx->num_ticks_poc_diff_one > 0) {
vps->vps_num_ticks_poc_diff_one_minus1 =
ctx->num_ticks_poc_diff_one - 1;
vps->vps_poc_proportional_to_timing_flag = 1;
} else if (ctx->num_ticks_poc_diff_one == 0) {
vps->vps_poc_proportional_to_timing_flag = 0;
}
}
h265_metadata_update_level(bsf, &vps->profile_tier_level.general_level_idc);
return 0;
}
static int h265_metadata_update_sps(AVBSFContext *bsf,
H265RawSPS *sps)
{
H265MetadataContext *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) {
// Table E-1.
static const AVRational sar_idc[] = {
{ 0, 0 }, // Unspecified (never written here).
{ 1, 1 }, { 12, 11 }, { 10, 11 }, { 16, 11 },
{ 40, 33 }, { 24, 11 }, { 20, 11 }, { 32, 11 },
{ 80, 33 }, { 18, 11 }, { 15, 11 }, { 64, 33 },
{ 160, 99 }, { 4, 3 }, { 3, 2 }, { 2, 1 },
};
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(sar_idc); i++) {
if (num == sar_idc[i].num &&
den == sar_idc[i].den)
break;
}
if (i == FF_ARRAY_ELEMS(sar_idc)) {
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_OR_INFER(field, value, present_flag, infer) do { \
if (value >= 0) { \
field = value; \
need_vui = 1; \
} else if (!present_flag) \
field = infer; \
} while (0)
if (ctx->video_format >= 0 ||
ctx->video_full_range_flag >= 0 ||
ctx->colour_primaries >= 0 ||
ctx->transfer_characteristics >= 0 ||
ctx->matrix_coefficients >= 0) {
SET_OR_INFER(sps->vui.video_format, ctx->video_format,
sps->vui.video_signal_type_present_flag, 5);
SET_OR_INFER(sps->vui.video_full_range_flag,
ctx->video_full_range_flag,
sps->vui.video_signal_type_present_flag, 0);
if (ctx->colour_primaries >= 0 ||
ctx->transfer_characteristics >= 0 ||
ctx->matrix_coefficients >= 0) {
SET_OR_INFER(sps->vui.colour_primaries,
ctx->colour_primaries,
sps->vui.colour_description_present_flag, 2);
SET_OR_INFER(sps->vui.transfer_characteristics,
ctx->transfer_characteristics,
sps->vui.colour_description_present_flag, 2);
SET_OR_INFER(sps->vui.matrix_coefficients,
ctx->matrix_coefficients,
sps->vui.colour_description_present_flag, 2);
sps->vui.colour_description_present_flag = 1;
}
sps->vui.video_signal_type_present_flag = 1;
need_vui = 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.vui_time_scale = num;
sps->vui.vui_num_units_in_tick = den;
sps->vui.vui_timing_info_present_flag = 1;
need_vui = 1;
if (ctx->num_ticks_poc_diff_one > 0) {
sps->vui.vui_num_ticks_poc_diff_one_minus1 =
ctx->num_ticks_poc_diff_one - 1;
sps->vui.vui_poc_proportional_to_timing_flag = 1;
} else if (ctx->num_ticks_poc_diff_one == 0) {
sps->vui.vui_poc_proportional_to_timing_flag = 0;
}
}
if (sps->separate_colour_plane_flag || sps->chroma_format_idc == 0) {
crop_unit_x = 1;
crop_unit_y = 1;
} else {
crop_unit_x = 1 + (sps->chroma_format_idc < 3);
crop_unit_y = 1 + (sps->chroma_format_idc < 2);
}
#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->conf_win_ ## border ## _offset = \
ctx->crop_ ## border / unit; \
sps->conformance_window_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 (need_vui)
sps->vui_parameters_present_flag = 1;
h265_metadata_update_level(bsf, &sps->profile_tier_level.general_level_idc);
return 0;
}
static int h265_metadata_update_fragment(AVBSFContext *bsf, AVPacket *pkt,
CodedBitstreamFragment *au)
{
H265MetadataContext *ctx = bsf->priv_data;
int err, i;
// If an AUD is present, it must be the first NAL unit.
if (au->units[0].type == HEVC_NAL_AUD) {
if (ctx->aud == BSF_ELEMENT_REMOVE)
ff_cbs_delete_unit(au, 0);
} else {
if (pkt && ctx->aud == BSF_ELEMENT_INSERT) {
H265RawAUD *aud = &ctx->aud_nal;
int pic_type = 0, temporal_id = 8, layer_id = 0;
for (i = 0; i < au->nb_units; i++) {
const H265RawNALUnitHeader *nal = au->units[i].content;
if (!nal)
continue;
if (nal->nuh_temporal_id_plus1 < temporal_id + 1)
temporal_id = nal->nuh_temporal_id_plus1 - 1;
if (au->units[i].type <= HEVC_NAL_RSV_VCL31) {
const H265RawSlice *slice = au->units[i].content;
layer_id = nal->nuh_layer_id;
if (slice->header.slice_type == HEVC_SLICE_B &&
pic_type < 2)
pic_type = 2;
if (slice->header.slice_type == HEVC_SLICE_P &&
pic_type < 1)
pic_type = 1;
}
}
aud->nal_unit_header = (H265RawNALUnitHeader) {
.nal_unit_type = HEVC_NAL_AUD,
.nuh_layer_id = layer_id,
.nuh_temporal_id_plus1 = temporal_id + 1,
};
aud->pic_type = pic_type;
err = ff_cbs_insert_unit_content(au, 0, HEVC_NAL_AUD, aud, NULL);
if (err < 0) {
av_log(bsf, AV_LOG_ERROR, "Failed to insert AUD.\n");
return err;
}
}
}
if (ctx->level == LEVEL_AUTO && !ctx->level_guess)
h265_metadata_guess_level(bsf, au);
for (i = 0; i < au->nb_units; i++) {
if (au->units[i].type == HEVC_NAL_VPS) {
err = h265_metadata_update_vps(bsf, au->units[i].content);
if (err < 0)
return err;
}
if (au->units[i].type == HEVC_NAL_SPS) {
err = h265_metadata_update_sps(bsf, au->units[i].content);
if (err < 0)
return err;
}
}
return 0;
}
static const CBSBSFType h265_metadata_type = {
.codec_id = AV_CODEC_ID_HEVC,
.fragment_name = "access unit",
.unit_name = "NAL unit",
.update_fragment = &h265_metadata_update_fragment,
};
static int h265_metadata_init(AVBSFContext *bsf)
{
return ff_cbs_bsf_generic_init(bsf, &h265_metadata_type);
}
#define OFFSET(x) offsetof(H265MetadataContext, x)
#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
static const AVOption h265_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 },
{ "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, 6, FLAGS },
{ "tick_rate",
"Set VPS and VUI tick rate (num_units_in_tick / time_scale)",
OFFSET(tick_rate), AV_OPT_TYPE_RATIONAL,
{ .dbl = 0.0 }, 0, UINT_MAX, FLAGS },
{ "num_ticks_poc_diff_one",
"Set VPS and VUI number of ticks per POC increment",
OFFSET(num_ticks_poc_diff_one), AV_OPT_TYPE_INT,
{ .i64 = -1 }, -1, INT_MAX, FLAGS },
{ "crop_left", "Set left border crop offset",
OFFSET(crop_left), AV_OPT_TYPE_INT,
{ .i64 = -1 }, -1, HEVC_MAX_WIDTH, FLAGS },
{ "crop_right", "Set right border crop offset",
OFFSET(crop_right), AV_OPT_TYPE_INT,
{ .i64 = -1 }, -1, HEVC_MAX_WIDTH, FLAGS },
{ "crop_top", "Set top border crop offset",
OFFSET(crop_top), AV_OPT_TYPE_INT,
{ .i64 = -1 }, -1, HEVC_MAX_HEIGHT, FLAGS },
{ "crop_bottom", "Set bottom border crop offset",
OFFSET(crop_bottom), AV_OPT_TYPE_INT,
{ .i64 = -1 }, -1, HEVC_MAX_HEIGHT, FLAGS },
{ "level", "Set level (tables A.6 and A.7)",
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", 30) },
{ LEVEL("2", 60) },
{ LEVEL("2.1", 63) },
{ LEVEL("3", 90) },
{ LEVEL("3.1", 93) },
{ LEVEL("4", 120) },
{ LEVEL("4.1", 123) },
{ LEVEL("5", 150) },
{ LEVEL("5.1", 153) },
{ LEVEL("5.2", 156) },
{ LEVEL("6", 180) },
{ LEVEL("6.1", 183) },
{ LEVEL("6.2", 186) },
{ LEVEL("8.5", 255) },
#undef LEVEL
{ NULL }
};
static const AVClass h265_metadata_class = {
.class_name = "h265_metadata_bsf",
.item_name = av_default_item_name,
.option = h265_metadata_options,
.version = LIBAVUTIL_VERSION_INT,
};
static const enum AVCodecID h265_metadata_codec_ids[] = {
AV_CODEC_ID_HEVC, AV_CODEC_ID_NONE,
};
const AVBitStreamFilter ff_hevc_metadata_bsf = {
.name = "hevc_metadata",
.priv_data_size = sizeof(H265MetadataContext),
.priv_class = &h265_metadata_class,
.init = &h265_metadata_init,
.close = &ff_cbs_bsf_generic_close,
.filter = &ff_cbs_bsf_generic_filter,
.codec_ids = h265_metadata_codec_ids,
};
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