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| | 1 | /* |
| | 2 | * AV1 parser |
| | 3 | * |
| | 4 | * Copyright (C) 2018 James Almer <jamrial@gmail.com> |
| | 5 | * |
| | 6 | * This file is part of FFmpeg. |
| | 7 | * |
| | 8 | * FFmpeg is free software; you can redistribute it and/or |
| | 9 | * modify it under the terms of the GNU Lesser General Public |
| | 10 | * License as published by the Free Software Foundation; either |
| | 11 | * version 2.1 of the License, or (at your option) any later version. |
| | 12 | * |
| | 13 | * FFmpeg is distributed in the hope that it will be useful, |
| | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| | 16 | * Lesser General Public License for more details. |
| | 17 | * |
| | 18 | * You should have received a copy of the GNU Lesser General Public |
| | 19 | * License along with FFmpeg; if not, write to the Free Software |
| | 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| | 21 | */ |
| | 22 | |
| | 23 | #include "av1_parse.h" |
| | 24 | #include "cbs.h" |
| | 25 | #include "cbs_av1.h" |
| | 26 | #include "parser.h" |
| | 27 | |
| | 28 | typedef struct AV1ParseContext { |
| | 29 | CodedBitstreamContext *cbc; |
| | 30 | CodedBitstreamFragment temporal_unit; |
| | 31 | int parsed_extradata; |
| | 32 | } AV1ParseContext; |
| | 33 | |
| | 34 | static const enum AVPixelFormat pix_fmts_8bit[2][2] = { |
| | 35 | { AV_PIX_FMT_YUV444P, AV_PIX_FMT_NONE }, |
| | 36 | { AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P }, |
| | 37 | }; |
| | 38 | static const enum AVPixelFormat pix_fmts_10bit[2][2] = { |
| | 39 | { AV_PIX_FMT_YUV444P10, AV_PIX_FMT_NONE }, |
| | 40 | { AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV420P10 }, |
| | 41 | }; |
| | 42 | static const enum AVPixelFormat pix_fmts_12bit[2][2] = { |
| | 43 | { AV_PIX_FMT_YUV444P12, AV_PIX_FMT_NONE }, |
| | 44 | { AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12 }, |
| | 45 | }; |
| | 46 | |
| | 47 | static int av1_parser_parse(AVCodecParserContext *ctx, |
| | 48 | AVCodecContext *avctx, |
| | 49 | const uint8_t **out_data, int *out_size, |
| | 50 | const uint8_t *data, int size) |
| | 51 | { |
| | 52 | AV1ParseContext *s = ctx->priv_data; |
| | 53 | CodedBitstreamFragment *td = &s->temporal_unit; |
| | 54 | CodedBitstreamAV1Context *av1 = s->cbc->priv_data; |
| | 55 | int ret; |
| | 56 | |
| | 57 | *out_data = data; |
| | 58 | *out_size = size; |
| | 59 | |
| | 60 | ctx->key_frame = -1; |
| | 61 | ctx->pict_type = AV_PICTURE_TYPE_NONE; |
| | 62 | ctx->picture_structure = AV_PICTURE_STRUCTURE_UNKNOWN; |
| | 63 | |
| | 64 | s->cbc->log_ctx = avctx; |
| | 65 | |
| | 66 | if (avctx->extradata_size && !s->parsed_extradata) { |
| | 67 | s->parsed_extradata = 1; |
| | 68 | |
| | 69 | ret = ff_cbs_read(s->cbc, td, avctx->extradata, avctx->extradata_size); |
| | 70 | if (ret < 0) { |
| | 71 | av_log(avctx, AV_LOG_ERROR, "Failed to parse extradata.\n"); |
| | 72 | goto end; |
| | 73 | } |
| | 74 | |
| | 75 | ff_cbs_fragment_uninit(s->cbc, td); |
| | 76 | } |
| | 77 | |
| | 78 | ret = ff_cbs_read(s->cbc, td, data, size); |
| | 79 | if (ret < 0) { |
| | 80 | av_log(avctx, AV_LOG_ERROR, "Failed to parse temporal unit.\n"); |
| | 81 | goto end; |
| | 82 | } |
| | 83 | |
| | 84 | if (!av1->sequence_header) { |
| | 85 | av_log(avctx, AV_LOG_ERROR, "No sequence header available\n"); |
| | 86 | goto end; |
| | 87 | } |
| | 88 | |
| | 89 | for (int i = 0; i < td->nb_units; i++) { |
| | 90 | CodedBitstreamUnit *unit = &td->units[i]; |
| | 91 | AV1RawOBU *obu = unit->content; |
| | 92 | AV1RawSequenceHeader *seq = av1->sequence_header; |
| | 93 | AV1RawColorConfig *color = &seq->color_config; |
| | 94 | AV1RawFrameHeader *frame; |
| | 95 | int frame_type; |
| | 96 | |
| | 97 | if (unit->type == AV1_OBU_FRAME) |
| | 98 | frame = &obu->obu.frame.header; |
| | 99 | else if (unit->type == AV1_OBU_FRAME_HEADER) |
| | 100 | frame = &obu->obu.frame_header; |
| | 101 | else |
| | 102 | continue; |
| | 103 | |
| | 104 | if (frame->show_existing_frame) { |
| | 105 | AV1ReferenceFrameState *ref = &av1->ref[frame->frame_to_show_map_idx]; |
| | 106 | |
| | 107 | if (!ref->valid) { |
| | 108 | av_log(avctx, AV_LOG_ERROR, "Invalid reference frame\n"); |
| | 109 | goto end; |
| | 110 | } |
| | 111 | |
| | 112 | ctx->width = ref->frame_width; |
| | 113 | ctx->height = ref->frame_height; |
| | 114 | frame_type = ref->frame_type; |
| | 115 | |
| | 116 | ctx->key_frame = 0; |
| | 117 | } else if (!frame->show_frame) { |
| | 118 | continue; |
| | 119 | } else { |
| | 120 | ctx->width = av1->frame_width; |
| | 121 | ctx->height = av1->frame_height; |
| | 122 | frame_type = frame->frame_type; |
| | 123 | |
| | 124 | ctx->key_frame = frame_type == AV1_FRAME_KEY; |
| | 125 | } |
| | 126 | |
| | 127 | avctx->profile = seq->seq_profile; |
| | 128 | avctx->level = seq->seq_level_idx[0]; |
| | 129 | |
| | 130 | switch (frame_type) { |
| | 131 | case AV1_FRAME_KEY: |
| | 132 | case AV1_FRAME_INTRA_ONLY: |
| | 133 | ctx->pict_type = AV_PICTURE_TYPE_I; |
| | 134 | break; |
| | 135 | case AV1_FRAME_INTER: |
| | 136 | ctx->pict_type = AV_PICTURE_TYPE_P; |
| | 137 | break; |
| | 138 | case AV1_FRAME_SWITCH: |
| | 139 | ctx->pict_type = AV_PICTURE_TYPE_SP; |
| | 140 | break; |
| | 141 | } |
| | 142 | ctx->picture_structure = AV_PICTURE_STRUCTURE_FRAME; |
| | 143 | |
| | 144 | switch (av1->bit_depth) { |
| | 145 | case 8: |
| | 146 | ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY8 |
| | 147 | : pix_fmts_8bit [color->subsampling_x][color->subsampling_y]; |
| | 148 | break; |
| | 149 | case 10: |
| | 150 | ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY10 |
| | 151 | : pix_fmts_10bit[color->subsampling_x][color->subsampling_y]; |
| | 152 | break; |
| | 153 | case 12: |
| | 154 | ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY12 |
| | 155 | : pix_fmts_12bit[color->subsampling_x][color->subsampling_y]; |
| | 156 | break; |
| | 157 | } |
| | 158 | av_assert2(ctx->format != AV_PIX_FMT_NONE); |
| | 159 | } |
| | 160 | |
| | 161 | end: |
| | 162 | ff_cbs_fragment_uninit(s->cbc, td); |
| | 163 | |
| | 164 | s->cbc->log_ctx = NULL; |
| | 165 | |
| | 166 | return size; |
| | 167 | } |
| | 168 | |
| | 169 | static const CodedBitstreamUnitType decompose_unit_types[] = { |
| | 170 | AV1_OBU_TEMPORAL_DELIMITER, |
| | 171 | AV1_OBU_SEQUENCE_HEADER, |
| | 172 | AV1_OBU_FRAME_HEADER, |
| | 173 | AV1_OBU_TILE_GROUP, |
| | 174 | AV1_OBU_FRAME, |
| | 175 | }; |
| | 176 | |
| | 177 | static av_cold int av1_parser_init(AVCodecParserContext *ctx) |
| | 178 | { |
| | 179 | AV1ParseContext *s = ctx->priv_data; |
| | 180 | int ret; |
| | 181 | |
| | 182 | ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_AV1, NULL); |
| | 183 | if (ret < 0) |
| | 184 | return ret; |
| | 185 | |
| | 186 | s->cbc->decompose_unit_types = (CodedBitstreamUnitType *)decompose_unit_types; |
| | 187 | s->cbc->nb_decompose_unit_types = FF_ARRAY_ELEMS(decompose_unit_types); |
| | 188 | |
| | 189 | return 0; |
| | 190 | } |
| | 191 | |
| | 192 | static void av1_parser_close(AVCodecParserContext *ctx) |
| | 193 | { |
| | 194 | AV1ParseContext *s = ctx->priv_data; |
| | 195 | |
| | 196 | ff_cbs_close(&s->cbc); |
| | 197 | } |
| | 198 | |
| | 199 | static int av1_parser_split(AVCodecContext *avctx, |
| | 200 | const uint8_t *buf, int buf_size) |
| | 201 | { |
| | 202 | AV1OBU obu; |
| | 203 | const uint8_t *ptr = buf, *end = buf + buf_size; |
| | 204 | |
| | 205 | while (ptr < end) { |
| | 206 | int len = ff_av1_extract_obu(&obu, ptr, buf_size, avctx); |
| | 207 | if (len < 0) |
| | 208 | break; |
| | 209 | |
| | 210 | if (obu.type == AV1_OBU_FRAME_HEADER || |
| | 211 | obu.type == AV1_OBU_FRAME) { |
| | 212 | return ptr - buf; |
| | 213 | } |
| | 214 | ptr += len; |
| | 215 | buf_size -= len; |
| | 216 | } |
| | 217 | |
| | 218 | return 0; |
| | 219 | } |
| | 220 | |
| | 221 | AVCodecParser ff_av1_parser = { |
| | 222 | .codec_ids = { AV_CODEC_ID_AV1 }, |
| | 223 | .priv_data_size = sizeof(AV1ParseContext), |
| | 224 | .parser_init = av1_parser_init, |
| | 225 | .parser_close = av1_parser_close, |
| | 226 | .parser_parse = av1_parser_parse, |
| | 227 | .split = av1_parser_split, |
| | 228 | }; |