/* * AV1 parser * * Copyright (C) 2018 James Almer <jamrial@gmail.com> * * 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/avassert.h" #include "av1_parse.h" #include "cbs.h" #include "cbs_av1.h" #include "parser.h" typedef struct AV1ParseContext { CodedBitstreamContext *cbc; CodedBitstreamFragment temporal_unit; int parsed_extradata; } AV1ParseContext; static const enum AVPixelFormat pix_fmts_8bit[2][2] = { { AV_PIX_FMT_YUV444P, AV_PIX_FMT_NONE }, { AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P }, }; static const enum AVPixelFormat pix_fmts_10bit[2][2] = { { AV_PIX_FMT_YUV444P10, AV_PIX_FMT_NONE }, { AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV420P10 }, }; static const enum AVPixelFormat pix_fmts_12bit[2][2] = { { AV_PIX_FMT_YUV444P12, AV_PIX_FMT_NONE }, { AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12 }, }; static const enum AVPixelFormat pix_fmts_rgb[3] = { AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12, }; static int av1_parser_parse(AVCodecParserContext *ctx, AVCodecContext *avctx, const uint8_t **out_data, int *out_size, const uint8_t *data, int size) { AV1ParseContext *s = ctx->priv_data; CodedBitstreamFragment *td = &s->temporal_unit; const CodedBitstreamAV1Context *av1 = s->cbc->priv_data; const AV1RawSequenceHeader *seq; const AV1RawColorConfig *color; int ret; *out_data = data; *out_size = size; ctx->key_frame = -1; ctx->pict_type = AV_PICTURE_TYPE_NONE; ctx->picture_structure = AV_PICTURE_STRUCTURE_UNKNOWN; s->cbc->log_ctx = avctx; if (avctx->extradata_size && !s->parsed_extradata) { s->parsed_extradata = 1; ret = ff_cbs_read_extradata_from_codec(s->cbc, td, avctx); if (ret < 0) { av_log(avctx, AV_LOG_WARNING, "Failed to parse extradata.\n"); } ff_cbs_fragment_reset(td); } ret = ff_cbs_read(s->cbc, td, data, size); if (ret < 0) { av_log(avctx, AV_LOG_ERROR, "Failed to parse temporal unit.\n"); goto end; } if (!av1->sequence_header) { av_log(avctx, AV_LOG_ERROR, "No sequence header available\n"); goto end; } seq = av1->sequence_header; color = &seq->color_config; for (int i = 0; i < td->nb_units; i++) { const CodedBitstreamUnit *unit = &td->units[i]; const AV1RawOBU *obu = unit->content; const AV1RawFrameHeader *frame; if (unit->type == AV1_OBU_FRAME) frame = &obu->obu.frame.header; else if (unit->type == AV1_OBU_FRAME_HEADER) frame = &obu->obu.frame_header; else continue; if (obu->header.spatial_id > 0) continue; if (!frame->show_frame && !frame->show_existing_frame) continue; ctx->width = frame->frame_width_minus_1 + 1; ctx->height = frame->frame_height_minus_1 + 1; ctx->key_frame = frame->frame_type == AV1_FRAME_KEY && !frame->show_existing_frame; switch (frame->frame_type) { case AV1_FRAME_KEY: case AV1_FRAME_INTRA_ONLY: ctx->pict_type = AV_PICTURE_TYPE_I; break; case AV1_FRAME_INTER: ctx->pict_type = AV_PICTURE_TYPE_P; break; case AV1_FRAME_SWITCH: ctx->pict_type = AV_PICTURE_TYPE_SP; break; } ctx->picture_structure = AV_PICTURE_STRUCTURE_FRAME; } switch (av1->bit_depth) { case 8: ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY8 : pix_fmts_8bit [color->subsampling_x][color->subsampling_y]; break; case 10: ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY10 : pix_fmts_10bit[color->subsampling_x][color->subsampling_y]; break; case 12: ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY12 : pix_fmts_12bit[color->subsampling_x][color->subsampling_y]; break; } av_assert2(ctx->format != AV_PIX_FMT_NONE); if (!color->subsampling_x && !color->subsampling_y && color->matrix_coefficients == AVCOL_SPC_RGB && color->color_primaries == AVCOL_PRI_BT709 && color->transfer_characteristics == AVCOL_TRC_IEC61966_2_1) ctx->format = pix_fmts_rgb[color->high_bitdepth + color->twelve_bit]; avctx->profile = seq->seq_profile; avctx->level = seq->seq_level_idx[0]; avctx->colorspace = (enum AVColorSpace) color->matrix_coefficients; avctx->color_primaries = (enum AVColorPrimaries) color->color_primaries; avctx->color_trc = (enum AVColorTransferCharacteristic) color->transfer_characteristics; avctx->color_range = color->color_range ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG; if (seq->timing_info_present_flag) avctx->framerate = ff_av1_framerate(1LL + seq->timing_info.num_ticks_per_picture_minus_1, seq->timing_info.num_units_in_display_tick, seq->timing_info.time_scale); end: ff_cbs_fragment_reset(td); s->cbc->log_ctx = NULL; return size; } static const CodedBitstreamUnitType decompose_unit_types[] = { AV1_OBU_TEMPORAL_DELIMITER, AV1_OBU_SEQUENCE_HEADER, AV1_OBU_FRAME_HEADER, AV1_OBU_TILE_GROUP, AV1_OBU_FRAME, }; static av_cold int av1_parser_init(AVCodecParserContext *ctx) { AV1ParseContext *s = ctx->priv_data; int ret; ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_AV1, NULL); if (ret < 0) return ret; s->cbc->decompose_unit_types = decompose_unit_types; s->cbc->nb_decompose_unit_types = FF_ARRAY_ELEMS(decompose_unit_types); return 0; } static void av1_parser_close(AVCodecParserContext *ctx) { AV1ParseContext *s = ctx->priv_data; ff_cbs_fragment_free(&s->temporal_unit); ff_cbs_close(&s->cbc); } const AVCodecParser ff_av1_parser = { .codec_ids = { AV_CODEC_ID_AV1 }, .priv_data_size = sizeof(AV1ParseContext), .parser_init = av1_parser_init, .parser_close = av1_parser_close, .parser_parse = av1_parser_parse, };