GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/avs2_parser.c Lines: 0 35 0.0 %
Date: 2019-11-22 03:34:36 Branches: 0 28 0.0 %

Line Branch Exec Source
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/*
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 * AVS2-P2/IEEE1857.4 video parser.
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 * Copyright (c) 2018  Huiwen Ren <hwrenx@gmail.com>
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include "parser.h"
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#define SLICE_MAX_START_CODE    0x000001af
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#define ISPIC(x)  ((x) == 0xB3 || (x) == 0xB6)
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#define ISUNIT(x) ((x) == 0xB0 || (x) == 0xB1 || (x) == 0xB2 || ISPIC(x))
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static int avs2_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size)
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{
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    int pic_found  = pc->frame_start_found;
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    uint32_t state = pc->state;
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    int cur = 0;
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    if (!pic_found) {
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        for (; cur < buf_size; ++cur) {
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            state = (state<<8) | buf[cur];
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            if (ISUNIT(buf[cur])){
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                ++cur;
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                pic_found = 1;
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                break;
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            }
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        }
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    }
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    if (pic_found) {
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        if (!buf_size)
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            return END_NOT_FOUND;
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        for (; cur < buf_size; ++cur) {
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            state = (state << 8) | buf[cur];
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            if ((state & 0xFFFFFF00) == 0x100 && state > SLICE_MAX_START_CODE) {
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                pc->frame_start_found = 0;
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                pc->state = -1;
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                return cur - 3;
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            }
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        }
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    }
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    pc->frame_start_found = pic_found;
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    pc->state = state;
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    return END_NOT_FOUND;
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}
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static int avs2_parse(AVCodecParserContext *s, AVCodecContext *avctx,
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                      const uint8_t **poutbuf, int *poutbuf_size,
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                      const uint8_t *buf, int buf_size)
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{
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    ParseContext *pc = s->priv_data;
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    int next;
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    if (s->flags & PARSER_FLAG_COMPLETE_FRAMES)  {
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        next = buf_size;
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    } else {
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        next = avs2_find_frame_end(pc, buf, buf_size);
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        if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
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            *poutbuf = NULL;
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            *poutbuf_size = 0;
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            return buf_size;
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        }
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    }
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    *poutbuf = buf;
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    *poutbuf_size = buf_size;
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    return next;
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}
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AVCodecParser ff_avs2_parser = {
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    .codec_ids      = { AV_CODEC_ID_AVS2 },
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    .priv_data_size = sizeof(ParseContext),
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    .parser_parse   = avs2_parse,
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    .parser_close   = ff_parse_close,
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    .split          = ff_mpeg4video_split,
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};