| /* |
| * H.266/VVC MP4 to Annex B byte stream format filter |
| * Copyright (c) 2022, Thomas Siedel |
| * |
| * 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 <string.h> |
| |
| #include "libavutil/intreadwrite.h" |
| #include "libavutil/mem.h" |
| |
| #include "bsf.h" |
| #include "bsf_internal.h" |
| #include "bytestream.h" |
| #include "defs.h" |
| #include "vvc.h" |
| |
| #define MIN_VVCC_LENGTH 23 |
| |
| typedef struct VVCBSFContext { |
| uint8_t length_size; |
| int extradata_parsed; |
| } VVCBSFContext; |
| |
| static int vvc_extradata_to_annexb(AVBSFContext *ctx) |
| { |
| GetByteContext gb; |
| int length_size, num_arrays, i, j; |
| int ret = 0; |
| int temp = 0; |
| int ptl_present; |
| |
| uint8_t *new_extradata = NULL; |
| size_t new_extradata_size = 0; |
| |
| int max_picture_width = 0; |
| int max_picture_height = 0; |
| int avg_frame_rate = 0; |
| |
| bytestream2_init(&gb, ctx->par_in->extradata, ctx->par_in->extradata_size); |
| temp = bytestream2_get_byte(&gb); |
| length_size = ((temp & 6) >> 1) + 1; |
| ptl_present = temp & 1; |
| if (ptl_present) { |
| int num_bytes_constraint_info; |
| int general_profile_idc; |
| int general_tier_flag; |
| int general_level_idc; |
| int ptl_frame_only_constraint_flag; |
| int ptl_multi_layer_enabled_flag; |
| int ptl_num_sub_profiles; |
| int temp3, temp4, temp5; |
| int temp2 = bytestream2_get_be16(&gb); |
| int ols_idx = (temp2 >> 7) & 0x1ff; |
| int num_sublayers = (temp2 >> 4) & 0x7; |
| int constant_frame_rate = (temp2 >> 2) & 0x3; |
| int chroma_format_idc = temp2 & 0x3; |
| int bit_depth_minus8 = (bytestream2_get_byte(&gb) >> 5) & 0x7; |
| av_log(ctx, AV_LOG_DEBUG, |
| "bit_depth_minus8 %d chroma_format_idc %d\n", bit_depth_minus8, |
| chroma_format_idc); |
| av_log(ctx, AV_LOG_DEBUG, "constant_frame_rate %d, ols_idx %d\n", |
| constant_frame_rate, ols_idx); |
| // VvcPTLRecord(num_sublayers) native_ptl |
| temp3 = bytestream2_get_byte(&gb); |
| num_bytes_constraint_info = (temp3) & 0x3f; |
| temp4 = bytestream2_get_byte(&gb); |
| general_profile_idc = (temp4 >> 1) & 0x7f; |
| general_tier_flag = (temp4) & 1; |
| general_level_idc = bytestream2_get_byte(&gb); |
| av_log(ctx, AV_LOG_DEBUG, |
| "general_profile_idc %d, general_tier_flag %d, general_level_idc %d, num_sublayers %d num_bytes_constraint_info %d\n", |
| general_profile_idc, general_tier_flag, general_level_idc, |
| num_sublayers, num_bytes_constraint_info); |
| |
| temp5 = bytestream2_get_byte(&gb); |
| ptl_frame_only_constraint_flag = (temp5 >> 7) & 0x1; |
| ptl_multi_layer_enabled_flag = (temp5 >> 6) & 0x1; |
| for (i = 0; i < num_bytes_constraint_info - 1; i++) { |
| // unsigned int(8*num_bytes_constraint_info - 2) general_constraint_info; |
| bytestream2_get_byte(&gb); |
| } |
| |
| av_log(ctx, AV_LOG_DEBUG, |
| "ptl_multi_layer_enabled_flag %d, ptl_frame_only_constraint_flag %d\n", |
| ptl_multi_layer_enabled_flag, ptl_frame_only_constraint_flag); |
| |
| if (num_sublayers > 1) { |
| int temp6 = bytestream2_get_byte(&gb); |
| uint8_t ptl_sublayer_level_present_flag[8] = { 0 }; |
| //uint8_t sublayer_level_idc[8] = {0}; |
| for (i = num_sublayers - 2; i >= 0; i--) { |
| ptl_sublayer_level_present_flag[i] = |
| (temp6 >> (7 - (num_sublayers - 2 - i))) & 0x01; |
| } |
| // for (j=num_sublayers; j<=8 && num_sublayers > 1; j++) |
| // bit(1) ptl_reserved_zero_bit = 0; |
| for (i = num_sublayers - 2; i >= 0; i--) { |
| if (ptl_sublayer_level_present_flag[i]) { |
| //sublayer_level_idc[i] = bytestream2_get_byte(&gb); |
| } |
| } |
| } |
| |
| ptl_num_sub_profiles = bytestream2_get_byte(&gb); |
| for (j = 0; j < ptl_num_sub_profiles; j++) { |
| // unsigned int(32) general_sub_profile_idc[j]; |
| bytestream2_get_be16(&gb); |
| bytestream2_get_be16(&gb); |
| } |
| |
| max_picture_width = bytestream2_get_be16(&gb); // unsigned_int(16) max_picture_width; |
| max_picture_height = bytestream2_get_be16(&gb); // unsigned_int(16) max_picture_height; |
| avg_frame_rate = bytestream2_get_be16(&gb); // unsigned int(16) avg_frame_rate; } |
| av_log(ctx, AV_LOG_DEBUG, |
| "max_picture_width %d, max_picture_height %d, avg_frame_rate %d\n", |
| max_picture_width, max_picture_height, avg_frame_rate); |
| } |
| |
| num_arrays = bytestream2_get_byte(&gb); |
| |
| for (i = 0; i < num_arrays; i++) { |
| int cnt; |
| int type = bytestream2_get_byte(&gb) & 0x1f; |
| |
| if (type == VVC_OPI_NUT || type == VVC_DCI_NUT) |
| cnt = 1; |
| else |
| cnt = bytestream2_get_be16(&gb); |
| |
| av_log(ctx, AV_LOG_DEBUG, "nalu_type %d cnt %d\n", type, cnt); |
| |
| if (!(type == VVC_OPI_NUT || type == VVC_DCI_NUT || |
| type == VVC_VPS_NUT || type == VVC_SPS_NUT || type == VVC_PPS_NUT |
| || type == VVC_PREFIX_SEI_NUT || type == VVC_SUFFIX_SEI_NUT)) { |
| av_log(ctx, AV_LOG_ERROR, |
| "Invalid NAL unit type in extradata: %d\n", type); |
| ret = AVERROR_INVALIDDATA; |
| goto fail; |
| } |
| |
| for (j = 0; j < cnt; j++) { |
| const int nalu_len = bytestream2_get_be16(&gb); |
| |
| if (!nalu_len || |
| nalu_len > bytestream2_get_bytes_left(&gb) || |
| 4 + AV_INPUT_BUFFER_PADDING_SIZE + nalu_len > SIZE_MAX - new_extradata_size) { |
| ret = AVERROR_INVALIDDATA; |
| goto fail; |
| } |
| ret = av_reallocp(&new_extradata, new_extradata_size + nalu_len + 4 |
| + AV_INPUT_BUFFER_PADDING_SIZE); |
| if (ret < 0) |
| goto fail; |
| |
| AV_WB32(new_extradata + new_extradata_size, 1); // add the startcode |
| bytestream2_get_buffer(&gb, new_extradata + new_extradata_size + 4, |
| nalu_len); |
| new_extradata_size += 4 + nalu_len; |
| memset(new_extradata + new_extradata_size, 0, |
| AV_INPUT_BUFFER_PADDING_SIZE); |
| } |
| } |
| |
| av_freep(&ctx->par_out->extradata); |
| ctx->par_out->extradata = new_extradata; |
| ctx->par_out->extradata_size = new_extradata_size; |
| |
| if (!new_extradata_size) |
| av_log(ctx, AV_LOG_WARNING, "No parameter sets in the extradata\n"); |
| |
| return length_size; |
| fail: |
| av_freep(&new_extradata); |
| return ret; |
| } |
| |
| static int vvc_mp4toannexb_init(AVBSFContext *ctx) |
| { |
| VVCBSFContext *s = ctx->priv_data; |
| int ret; |
| |
| if (ctx->par_in->extradata_size < MIN_VVCC_LENGTH || |
| AV_RB24(ctx->par_in->extradata) == 1 || |
| AV_RB32(ctx->par_in->extradata) == 1) { |
| av_log(ctx, AV_LOG_VERBOSE, |
| "The input looks like it is Annex B already\n"); |
| } else { |
| ret = vvc_extradata_to_annexb(ctx); |
| if (ret < 0) |
| return ret; |
| s->length_size = ret; |
| s->extradata_parsed = 1; |
| } |
| |
| return 0; |
| } |
| |
| static int vvc_mp4toannexb_filter(AVBSFContext *ctx, AVPacket *out) |
| { |
| VVCBSFContext *s = ctx->priv_data; |
| AVPacket *in; |
| GetByteContext gb; |
| |
| int is_irap = 0; |
| int added_extra = 0; |
| int i, ret = 0; |
| |
| ret = ff_bsf_get_packet(ctx, &in); |
| if (ret < 0) |
| return ret; |
| |
| if (!s->extradata_parsed) { |
| av_packet_move_ref(out, in); |
| av_packet_free(&in); |
| return 0; |
| } |
| |
| bytestream2_init(&gb, in->data, in->size); |
| |
| /* check if this packet contains an IRAP. The extradata will need to be added before any potential PH_NUT */ |
| while (bytestream2_get_bytes_left(&gb)) { |
| uint32_t nalu_size = 0; |
| int nalu_type; |
| |
| if (bytestream2_get_bytes_left(&gb) < s->length_size) { |
| ret = AVERROR_INVALIDDATA; |
| goto fail; |
| } |
| |
| for (i = 0; i < s->length_size; i++) |
| nalu_size = (nalu_size << 8) | bytestream2_get_byte(&gb); |
| |
| if (nalu_size < 2 || nalu_size > bytestream2_get_bytes_left(&gb)) { |
| ret = AVERROR_INVALIDDATA; |
| goto fail; |
| } |
| |
| nalu_type = (bytestream2_peek_be16(&gb) >> 3) & 0x1f; |
| is_irap = nalu_type >= VVC_IDR_W_RADL && nalu_type <= VVC_RSV_IRAP_11; |
| if (is_irap) { |
| break; |
| } |
| bytestream2_seek(&gb, nalu_size, SEEK_CUR); |
| } |
| |
| bytestream2_seek(&gb, 0, SEEK_SET); |
| while (bytestream2_get_bytes_left(&gb)) { |
| uint32_t nalu_size = 0; |
| int nalu_type; |
| int add_extradata, extra_size, prev_size; |
| |
| if (bytestream2_get_bytes_left(&gb) < s->length_size) { |
| ret = AVERROR_INVALIDDATA; |
| goto fail; |
| } |
| |
| for (i = 0; i < s->length_size; i++) |
| nalu_size = (nalu_size << 8) | bytestream2_get_byte(&gb); |
| |
| if (nalu_size < 2 || nalu_size > bytestream2_get_bytes_left(&gb)) { |
| ret = AVERROR_INVALIDDATA; |
| goto fail; |
| } |
| |
| nalu_type = (bytestream2_peek_be16(&gb) >> 3) & 0x1f; |
| |
| /* prepend extradata to IRAP frames */ |
| add_extradata = is_irap && nalu_type != VVC_AUD_NUT && !added_extra; |
| extra_size = add_extradata * ctx->par_out->extradata_size; |
| added_extra |= add_extradata; |
| |
| if (FFMIN(INT_MAX, SIZE_MAX) < 4ULL + nalu_size + extra_size) { |
| ret = AVERROR_INVALIDDATA; |
| goto fail; |
| } |
| |
| prev_size = out->size; |
| |
| ret = av_grow_packet(out, 4 + nalu_size + extra_size); |
| if (ret < 0) |
| goto fail; |
| |
| if (extra_size) |
| memcpy(out->data + prev_size, ctx->par_out->extradata, extra_size); |
| AV_WB32(out->data + prev_size + extra_size, 1); |
| bytestream2_get_buffer(&gb, out->data + prev_size + 4 + extra_size, |
| nalu_size); |
| } |
| |
| ret = av_packet_copy_props(out, in); |
| if (ret < 0) |
| goto fail; |
| |
| fail: |
| if (ret < 0) |
| av_packet_unref(out); |
| av_packet_free(&in); |
| |
| return ret; |
| } |
| |
| static const enum AVCodecID codec_ids[] = { |
| AV_CODEC_ID_VVC, AV_CODEC_ID_NONE, |
| }; |
| |
| const FFBitStreamFilter ff_vvc_mp4toannexb_bsf = { |
| .p.name = "vvc_mp4toannexb", |
| .p.codec_ids = codec_ids, |
| .priv_data_size = sizeof(VVCBSFContext), |
| .init = vvc_mp4toannexb_init, |
| .filter = vvc_mp4toannexb_filter, |
| }; |