From 6223d77578df8146596c878c96e243095fb9e201 Mon Sep 17 00:00:00 2001 From: hwren Date: Mon, 5 Oct 2020 20:09:20 +0800 Subject: [PATCH] lavc/avs3_parser: add avs3 parser Signed-off-by: hbj Signed-off-by: hwren --- libavcodec/Makefile | 1 + libavcodec/avs3_parser.c | 179 +++++++++++++++++++++++++++++++++++++++ libavcodec/parsers.c | 1 + 3 files changed, 181 insertions(+) create mode 100644 libavcodec/avs3_parser.c diff --git a/libavcodec/Makefile b/libavcodec/Makefile index 0d2f7960a9..3ac7fa96c4 100644 --- a/libavcodec/Makefile +++ b/libavcodec/Makefile @@ -1066,6 +1066,7 @@ OBJS-$(CONFIG_AC3_PARSER) += ac3tab.o aac_ac3_parser.o OBJS-$(CONFIG_ADX_PARSER) += adx_parser.o adx.o OBJS-$(CONFIG_AV1_PARSER) += av1_parser.o av1_parse.o OBJS-$(CONFIG_AVS2_PARSER) += avs2_parser.o +OBJS-$(CONFIG_AVS3_PARSER) += avs3_parser.o OBJS-$(CONFIG_BMP_PARSER) += bmp_parser.o OBJS-$(CONFIG_CAVSVIDEO_PARSER) += cavs_parser.o OBJS-$(CONFIG_COOK_PARSER) += cook_parser.o diff --git a/libavcodec/avs3_parser.c b/libavcodec/avs3_parser.c new file mode 100644 index 0000000000..bf97f75db6 --- /dev/null +++ b/libavcodec/avs3_parser.c @@ -0,0 +1,179 @@ +/* + * AVS3-P2/IEEE1857.10 video parser. + * Copyright (c) 2020 Zhenyu Wang + * Bingjie Han + * Huiwen Ren + * + * 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 "avs3.h" +#include "get_bits.h" +#include "parser.h" + +static int avs3_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size) +{ + int pic_found = pc->frame_start_found; + uint32_t state = pc->state; + int cur = 0; + + if (!pic_found) { + for (; cur < buf_size; ++cur) { + state = (state << 8) | buf[cur]; + if (AVS3_ISPIC(buf[cur])){ + cur++; + pic_found = 1; + break; + } + } + } + + if (pic_found) { + if (!buf_size) + return END_NOT_FOUND; + for (; cur < buf_size; ++cur) { + state = (state << 8) | buf[cur]; + if ((state & 0xFFFFFF00) == 0x100 && AVS3_ISUNIT(state & 0xFF)) { + pc->frame_start_found = 0; + pc->state = -1; + return cur - 3; + } + } + } + + pc->frame_start_found = pic_found; + pc->state = state; + + return END_NOT_FOUND; +} + +static void parse_avs3_nal_units(AVCodecParserContext *s, const uint8_t *buf, + int buf_size, AVCodecContext *avctx) +{ + if (buf_size < 5) { + return; + } + + if (buf[0] == 0x0 && buf[1] == 0x0 && buf[2] == 0x1) { + if (buf[3] == AVS3_SEQ_START_CODE) { + GetBitContext gb; + int profile, ratecode; + + init_get_bits(&gb, buf + 4, buf_size - 4); + + s->key_frame = 1; + s->pict_type = AV_PICTURE_TYPE_I; + + profile = get_bits(&gb, 8); + // Skip bits: level(8) + // progressive(1) + // field(1) + // library(2) + // resv(1) + // width(14) + // resv(1) + // height(14) + // chroma(2) + // sampe_precision(3) + skip_bits(&gb, 47); + + if (profile == AVS3_PROFILE_BASELINE_MAIN10) { + int sample_precision = get_bits(&gb, 3); + if (sample_precision == 1) { + avctx->pix_fmt = AV_PIX_FMT_YUV420P; + } else if (sample_precision == 2) { + avctx->pix_fmt = AV_PIX_FMT_YUV420P10LE; + } else { + avctx->pix_fmt = AV_PIX_FMT_NONE; + } + } + + // Skip bits: resv(1) + // aspect(4) + skip_bits(&gb, 5); + + ratecode = get_bits(&gb, 4); + + // Skip bits: resv(1) + // bitrate_low(18) + // resv(1) + // bitrate_high(12) + skip_bits(&gb, 32); + + avctx->has_b_frames = !get_bits(&gb, 1); + + avctx->framerate.num = avctx->time_base.den = ff_avs3_frame_rate_tab[ratecode].num; + avctx->framerate.den = avctx->time_base.num = ff_avs3_frame_rate_tab[ratecode].den; + + s->width = s->coded_width = avctx->width; + s->height = s->coded_height = avctx->height; + + av_log(avctx, AV_LOG_DEBUG, + "AVS3 parse seq HDR: profile %d; coded size: %dx%d; frame rate code: %d\n", + profile, avctx->width, avctx->height, ratecode); + + } else if (buf[3] == AVS3_INTRA_PIC_START_CODE) { + s->key_frame = 1; + s->pict_type = AV_PICTURE_TYPE_I; + } else if (buf[3] == AVS3_INTER_PIC_START_CODE){ + s->key_frame = 0; + if (buf_size > 9) { + int pic_code_type = buf[8] & 0x3; + if (pic_code_type == 1 || pic_code_type == 3) { + s->pict_type = AV_PICTURE_TYPE_P; + } else { + s->pict_type = AV_PICTURE_TYPE_B; + } + } + } + } +} + + +static int avs3_parse(AVCodecParserContext *s, AVCodecContext *avctx, + const uint8_t **poutbuf, int *poutbuf_size, + const uint8_t *buf, int buf_size) +{ + ParseContext *pc = s->priv_data; + int next; + + if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) { + next = buf_size; + } else { + next = avs3_find_frame_end(pc, buf, buf_size); + if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) { + *poutbuf = NULL; + *poutbuf_size = 0; + return buf_size; + } + } + + parse_avs3_nal_units(s, buf, buf_size, avctx); + + *poutbuf = buf; + *poutbuf_size = buf_size; + + return next; +} + +AVCodecParser ff_avs3_parser = { + .codec_ids = { AV_CODEC_ID_AVS3 }, + .priv_data_size = sizeof(ParseContext), + .parser_parse = avs3_parse, + .parser_close = ff_parse_close, + .split = ff_mpeg4video_split, +}; diff --git a/libavcodec/parsers.c b/libavcodec/parsers.c index d23c603d34..74ea4de6c3 100644 --- a/libavcodec/parsers.c +++ b/libavcodec/parsers.c @@ -28,6 +28,7 @@ extern AVCodecParser ff_ac3_parser; extern AVCodecParser ff_adx_parser; extern AVCodecParser ff_av1_parser; extern AVCodecParser ff_avs2_parser; +extern AVCodecParser ff_avs3_parser; extern AVCodecParser ff_bmp_parser; extern AVCodecParser ff_cavsvideo_parser; extern AVCodecParser ff_cook_parser;