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3fe98db7bb
A BSF should never include avcodec.h at all. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
328 lines
11 KiB
C
328 lines
11 KiB
C
/*
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* H.266/VVC MP4 to Annex B byte stream format filter
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* Copyright (c) 2022, Thomas Siedel
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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 <string.h>
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#include "libavutil/intreadwrite.h"
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#include "libavutil/mem.h"
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#include "bsf.h"
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#include "bsf_internal.h"
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#include "bytestream.h"
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#include "defs.h"
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#include "vvc.h"
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#define MIN_VVCC_LENGTH 23
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typedef struct VVCBSFContext {
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uint8_t length_size;
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int extradata_parsed;
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} VVCBSFContext;
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static int vvc_extradata_to_annexb(AVBSFContext *ctx)
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{
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GetByteContext gb;
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int length_size, num_arrays, i, j;
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int ret = 0;
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int temp = 0;
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int ptl_present;
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uint8_t *new_extradata = NULL;
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size_t new_extradata_size = 0;
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int max_picture_width = 0;
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int max_picture_height = 0;
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int avg_frame_rate = 0;
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bytestream2_init(&gb, ctx->par_in->extradata, ctx->par_in->extradata_size);
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temp = bytestream2_get_byte(&gb);
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length_size = ((temp & 6) >> 1) + 1;
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ptl_present = temp & 1;
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if (ptl_present) {
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int num_bytes_constraint_info;
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int general_profile_idc;
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int general_tier_flag;
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int general_level_idc;
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int ptl_frame_only_constraint_flag;
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int ptl_multi_layer_enabled_flag;
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int ptl_num_sub_profiles;
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int temp3, temp4, temp5;
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int temp2 = bytestream2_get_be16(&gb);
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int ols_idx = (temp2 >> 7) & 0x1ff;
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int num_sublayers = (temp2 >> 4) & 0x7;
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int constant_frame_rate = (temp2 >> 2) & 0x3;
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int chroma_format_idc = temp2 & 0x3;
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int bit_depth_minus8 = (bytestream2_get_byte(&gb) >> 5) & 0x7;
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av_log(ctx, AV_LOG_DEBUG,
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"bit_depth_minus8 %d chroma_format_idc %d\n", bit_depth_minus8,
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chroma_format_idc);
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av_log(ctx, AV_LOG_DEBUG, "constant_frame_rate %d, ols_idx %d\n",
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constant_frame_rate, ols_idx);
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// VvcPTLRecord(num_sublayers) native_ptl
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temp3 = bytestream2_get_byte(&gb);
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num_bytes_constraint_info = (temp3) & 0x3f;
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temp4 = bytestream2_get_byte(&gb);
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general_profile_idc = (temp4 >> 1) & 0x7f;
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general_tier_flag = (temp4) & 1;
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general_level_idc = bytestream2_get_byte(&gb);
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av_log(ctx, AV_LOG_DEBUG,
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"general_profile_idc %d, general_tier_flag %d, general_level_idc %d, num_sublayers %d num_bytes_constraint_info %d\n",
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general_profile_idc, general_tier_flag, general_level_idc,
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num_sublayers, num_bytes_constraint_info);
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temp5 = bytestream2_get_byte(&gb);
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ptl_frame_only_constraint_flag = (temp5 >> 7) & 0x1;
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ptl_multi_layer_enabled_flag = (temp5 >> 6) & 0x1;
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for (i = 0; i < num_bytes_constraint_info - 1; i++) {
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// unsigned int(8*num_bytes_constraint_info - 2) general_constraint_info;
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bytestream2_get_byte(&gb);
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}
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av_log(ctx, AV_LOG_DEBUG,
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"ptl_multi_layer_enabled_flag %d, ptl_frame_only_constraint_flag %d\n",
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ptl_multi_layer_enabled_flag, ptl_frame_only_constraint_flag);
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if (num_sublayers > 1) {
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int temp6 = bytestream2_get_byte(&gb);
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uint8_t ptl_sublayer_level_present_flag[8] = { 0 };
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//uint8_t sublayer_level_idc[8] = {0};
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for (i = num_sublayers - 2; i >= 0; i--) {
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ptl_sublayer_level_present_flag[i] =
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(temp6 >> (7 - (num_sublayers - 2 - i))) & 0x01;
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}
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// for (j=num_sublayers; j<=8 && num_sublayers > 1; j++)
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// bit(1) ptl_reserved_zero_bit = 0;
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for (i = num_sublayers - 2; i >= 0; i--) {
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if (ptl_sublayer_level_present_flag[i]) {
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//sublayer_level_idc[i] = bytestream2_get_byte(&gb);
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}
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}
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}
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ptl_num_sub_profiles = bytestream2_get_byte(&gb);
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for (j = 0; j < ptl_num_sub_profiles; j++) {
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// unsigned int(32) general_sub_profile_idc[j];
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bytestream2_get_be16(&gb);
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bytestream2_get_be16(&gb);
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}
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max_picture_width = bytestream2_get_be16(&gb); // unsigned_int(16) max_picture_width;
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max_picture_height = bytestream2_get_be16(&gb); // unsigned_int(16) max_picture_height;
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avg_frame_rate = bytestream2_get_be16(&gb); // unsigned int(16) avg_frame_rate; }
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av_log(ctx, AV_LOG_DEBUG,
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"max_picture_width %d, max_picture_height %d, avg_frame_rate %d\n",
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max_picture_width, max_picture_height, avg_frame_rate);
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}
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num_arrays = bytestream2_get_byte(&gb);
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for (i = 0; i < num_arrays; i++) {
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int cnt;
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int type = bytestream2_get_byte(&gb) & 0x1f;
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if (type == VVC_OPI_NUT || type == VVC_DCI_NUT)
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cnt = 1;
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else
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cnt = bytestream2_get_be16(&gb);
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av_log(ctx, AV_LOG_DEBUG, "nalu_type %d cnt %d\n", type, cnt);
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if (!(type == VVC_OPI_NUT || type == VVC_DCI_NUT ||
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type == VVC_VPS_NUT || type == VVC_SPS_NUT || type == VVC_PPS_NUT
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|| type == VVC_PREFIX_SEI_NUT || type == VVC_SUFFIX_SEI_NUT)) {
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av_log(ctx, AV_LOG_ERROR,
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"Invalid NAL unit type in extradata: %d\n", type);
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ret = AVERROR_INVALIDDATA;
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goto fail;
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}
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for (j = 0; j < cnt; j++) {
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int nalu_len = bytestream2_get_be16(&gb);
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if (4 + AV_INPUT_BUFFER_PADDING_SIZE + nalu_len >
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SIZE_MAX - new_extradata_size) {
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ret = AVERROR_INVALIDDATA;
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goto fail;
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}
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ret = av_reallocp(&new_extradata, new_extradata_size + nalu_len + 4
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+ AV_INPUT_BUFFER_PADDING_SIZE);
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if (ret < 0)
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goto fail;
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AV_WB32(new_extradata + new_extradata_size, 1); // add the startcode
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bytestream2_get_buffer(&gb, new_extradata + new_extradata_size + 4,
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nalu_len);
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new_extradata_size += 4 + nalu_len;
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memset(new_extradata + new_extradata_size, 0,
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AV_INPUT_BUFFER_PADDING_SIZE);
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}
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}
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av_freep(&ctx->par_out->extradata);
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ctx->par_out->extradata = new_extradata;
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ctx->par_out->extradata_size = new_extradata_size;
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if (!new_extradata_size)
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av_log(ctx, AV_LOG_WARNING, "No parameter sets in the extradata\n");
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return length_size;
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fail:
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av_freep(&new_extradata);
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return ret;
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}
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static int vvc_mp4toannexb_init(AVBSFContext *ctx)
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{
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VVCBSFContext *s = ctx->priv_data;
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int ret;
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if (ctx->par_in->extradata_size < MIN_VVCC_LENGTH ||
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AV_RB24(ctx->par_in->extradata) == 1 ||
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AV_RB32(ctx->par_in->extradata) == 1) {
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av_log(ctx, AV_LOG_VERBOSE,
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"The input looks like it is Annex B already\n");
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} else {
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ret = vvc_extradata_to_annexb(ctx);
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if (ret < 0)
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return ret;
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s->length_size = ret;
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s->extradata_parsed = 1;
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}
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return 0;
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}
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static int vvc_mp4toannexb_filter(AVBSFContext *ctx, AVPacket *out)
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{
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VVCBSFContext *s = ctx->priv_data;
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AVPacket *in;
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GetByteContext gb;
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int is_irap = 0;
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int added_extra = 0;
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int i, ret = 0;
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ret = ff_bsf_get_packet(ctx, &in);
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if (ret < 0)
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return ret;
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if (!s->extradata_parsed) {
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av_packet_move_ref(out, in);
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av_packet_free(&in);
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return 0;
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}
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bytestream2_init(&gb, in->data, in->size);
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/* check if this packet contains an IRAP. The extradata will need to be added before any potential PH_NUT */
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while (bytestream2_get_bytes_left(&gb)) {
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uint32_t nalu_size = 0;
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int nalu_type;
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if (bytestream2_get_bytes_left(&gb) < s->length_size) {
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ret = AVERROR_INVALIDDATA;
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goto fail;
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}
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for (i = 0; i < s->length_size; i++)
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nalu_size = (nalu_size << 8) | bytestream2_get_byte(&gb);
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if (nalu_size < 2 || nalu_size > bytestream2_get_bytes_left(&gb)) {
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ret = AVERROR_INVALIDDATA;
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goto fail;
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}
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nalu_type = (bytestream2_peek_be16(&gb) >> 3) & 0x1f;
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is_irap = nalu_type >= VVC_IDR_W_RADL && nalu_type <= VVC_RSV_IRAP_11;
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if (is_irap) {
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break;
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}
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bytestream2_seek(&gb, nalu_size, SEEK_CUR);
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}
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bytestream2_seek(&gb, 0, SEEK_SET);
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while (bytestream2_get_bytes_left(&gb)) {
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uint32_t nalu_size = 0;
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int nalu_type;
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int add_extradata, extra_size, prev_size;
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if (bytestream2_get_bytes_left(&gb) < s->length_size) {
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ret = AVERROR_INVALIDDATA;
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goto fail;
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}
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for (i = 0; i < s->length_size; i++)
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nalu_size = (nalu_size << 8) | bytestream2_get_byte(&gb);
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if (nalu_size < 2 || nalu_size > bytestream2_get_bytes_left(&gb)) {
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ret = AVERROR_INVALIDDATA;
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goto fail;
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}
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nalu_type = (bytestream2_peek_be16(&gb) >> 3) & 0x1f;
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/* prepend extradata to IRAP frames */
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add_extradata = is_irap && nalu_type != VVC_AUD_NUT && !added_extra;
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extra_size = add_extradata * ctx->par_out->extradata_size;
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added_extra |= add_extradata;
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if (FFMIN(INT_MAX, SIZE_MAX) < 4ULL + nalu_size + extra_size) {
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ret = AVERROR_INVALIDDATA;
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goto fail;
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}
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prev_size = out->size;
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ret = av_grow_packet(out, 4 + nalu_size + extra_size);
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if (ret < 0)
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goto fail;
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if (extra_size)
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memcpy(out->data + prev_size, ctx->par_out->extradata, extra_size);
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AV_WB32(out->data + prev_size + extra_size, 1);
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bytestream2_get_buffer(&gb, out->data + prev_size + 4 + extra_size,
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nalu_size);
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}
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ret = av_packet_copy_props(out, in);
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if (ret < 0)
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goto fail;
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fail:
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if (ret < 0)
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av_packet_unref(out);
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av_packet_free(&in);
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return ret;
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}
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static const enum AVCodecID codec_ids[] = {
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AV_CODEC_ID_VVC, AV_CODEC_ID_NONE,
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};
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const FFBitStreamFilter ff_vvc_mp4toannexb_bsf = {
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.p.name = "vvc_mp4toannexb",
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.p.codec_ids = codec_ids,
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.priv_data_size = sizeof(VVCBSFContext),
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.init = vvc_mp4toannexb_init,
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.filter = vvc_mp4toannexb_filter,
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};
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