From patchwork Wed Aug 5 16:18:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: hwren X-Patchwork-Id: 21504 Return-Path: X-Original-To: patchwork@ffaux-bg.ffmpeg.org Delivered-To: patchwork@ffaux-bg.ffmpeg.org Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org [79.124.17.100]) by ffaux.localdomain (Postfix) with ESMTP id 23C9D44A6D0 for ; Wed, 5 Aug 2020 19:50:26 +0300 (EEST) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 05C4A68B93E; Wed, 5 Aug 2020 19:50:26 +0300 (EEST) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from m15113.mail.126.com (m15113.mail.126.com [220.181.15.113]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 8446868B87C for ; Wed, 5 Aug 2020 19:50:23 +0300 (EEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=126.com; s=s110527; h=From:Subject:Date:Message-Id:MIME-Version; bh=NsKI3 k2tlcwy4PwjPoxLy21/NFVnPOJcugnkwVNxtQU=; b=Ett2rBYCmnDqCQ0m6JtOC ubLga0Pf9h0Lfx6ES63hKNiUdNZhs2jWZr1Slw8LqEtacMvfZGBpVWozPHVKEaIx w4U10FO69hb3G9M6K/o4D0ZaKLxaFlZ6maaLReqmtuVTh6AKdNYN5MsWUL6w7kq0 TBcn/9JFLWzi/fF+lY42eo= Received: from localhost.localdomain (unknown [111.34.131.254]) by smtp3 (Coremail) with SMTP id DcmowABHnfH72ypfKjeXIQ--.11141S4; Thu, 06 Aug 2020 00:19:09 +0800 (CST) From: hwrenx@126.com To: ffmpeg-devel@ffmpeg.org Date: Thu, 6 Aug 2020 00:18:29 +0800 Message-Id: <20200805161831.446-3-hwrenx@126.com> X-Mailer: git-send-email 2.23.0.windows.1 In-Reply-To: <20200805161831.446-1-hwrenx@126.com> References: <20200805161831.446-1-hwrenx@126.com> MIME-Version: 1.0 X-CM-TRANSID: DcmowABHnfH72ypfKjeXIQ--.11141S4 X-Coremail-Antispam: 1Uf129KBjvJXoWxuw1DJF18Aw13KF47JrW5ZFb_yoWxXw47pF sxCF1rGr4xtana9rZ7tr13K3W5Wr9YqFyktFWxur1rt39agryDX3ZrGFyYk34fWr93ZFy5 urs8WFyUKw1Dt3DanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07UtrcfUUUUU= X-Originating-IP: [111.34.131.254] X-CM-SenderInfo: pkzuv0b06rjloofrz/1tbiZh536VpD+-jZSwAAsu Subject: [FFmpeg-devel] [PATCH v3 2/4] lavc/avs3_paeser: add avs3 parser X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Cc: hwren , hbj Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" From: hwren Signed-off-by: hbj Signed-off-by: hwren --- libavcodec/Makefile | 1 + libavcodec/avs3_parser.c | 184 +++++++++++++++++++++++++++++++++++++++ libavcodec/parsers.c | 1 + 3 files changed, 186 insertions(+) create mode 100644 libavcodec/avs3_parser.c diff --git a/libavcodec/Makefile b/libavcodec/Makefile index 5a6ea59715..f1512779be 100644 --- a/libavcodec/Makefile +++ b/libavcodec/Makefile @@ -1053,6 +1053,7 @@ 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..7a7f826c59 --- /dev/null +++ b/libavcodec/avs3_parser.c @@ -0,0 +1,184 @@ +/* + * 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 "parser.h" + +#define SLICE_MAX_START_CODE 0x000001af + +#define ISPIC(x) ((x) == 0xB3 || (x) == 0xB6) +#define ISUNIT(x) ((x) == 0xB0 || ISPIC(x)) + +static av_cold 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 (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 && 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 unsigned int read_bits(const char** ppbuf, int *pidx, int bits) +{ + const char* p = *ppbuf; + int idx = *pidx; + unsigned int val = 0; + + while (bits) { + bits--; + val = (val << 1) | (((*p) >> idx) & 0x1); + if (--idx < 0) { + idx = 7; + p++; + } + } + + *ppbuf = p; + *pidx = idx; + + return val; +} + +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] == 0xB0) { + static const int avs3_fps_num[9] = {0, 240000, 24, 25, 30000, 30, 50, 60000, 60 }; + static const int avs3_fps_den[9] = {1, 1001, 1, 1, 1001, 1, 1, 1001, 1 }; + int profile,ratecode; + const char* p = buf + 4; + int idx = 7; + + s->key_frame = 1; + s->pict_type = AV_PICTURE_TYPE_I; + + profile = read_bits(&p, &idx, 8); + // level(8) + progressive(1) + field(1) + library(2) + resv(1) + width(14) + resv(1) + height(14) + chroma(2) + sampe_precision(3) + read_bits(&p, &idx, 47); + + if (profile == 0x22) { + avctx->pix_fmt = read_bits(&p, &idx, 3) == 1 ? AV_PIX_FMT_YUV420P : AV_PIX_FMT_YUV420P10LE; + } + + // resv(1) + aspect(4) + read_bits(&p, &idx, 5); + + ratecode = read_bits(&p, &idx, 4); + + // resv(1) + bitrate_low(18) + resv(1) + bitrate_high(12) + read_bits(&p, &idx, 32); + + avctx->has_b_frames = !read_bits(&p, &idx, 1); + + avctx->framerate.num = avctx->time_base.den = avs3_fps_num[ratecode]; + avctx->framerate.den = avctx->time_base.num = avs3_fps_den[ratecode]; + + 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 wxh: %dx%d; " + "frame_rate_code %d\n", profile, avctx->width, avctx->height, ratecode); + + } else if (buf[3] == 0xB3) { + s->key_frame = 1; + s->pict_type = AV_PICTURE_TYPE_I; + } else if (buf[3] == 0xB6){ + 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 7d75cea830..aab1d5e3e5 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;