GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/tak_parser.c Lines: 49 57 86.0 %
Date: 2020-09-25 23:16:12 Branches: 38 50 76.0 %

Line Branch Exec Source
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/*
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 * TAK parser
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 * Copyright (c) 2012 Michael Niedermayer
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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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/**
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 * @file
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 * TAK parser
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 **/
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#define BITSTREAM_READER_LE
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#include "parser.h"
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#include "tak.h"
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typedef struct TAKParseContext {
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    ParseContext  pc;
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    TAKStreamInfo ti;
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    int           index;
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} TAKParseContext;
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1026
static int tak_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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1026
    TAKParseContext *t = s->priv_data;
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1026
    ParseContext *pc   = &t->pc;
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1026
    int next           = END_NOT_FOUND;
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    GetBitContext gb;
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1026
    int consumed = 0;
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1026
    int needed   = buf_size ? TAK_MAX_FRAME_HEADER_BYTES : 8;
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    int ret;
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49
1026
    *poutbuf      = buf;
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1026
    *poutbuf_size = buf_size;
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1026
    if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) {
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        TAKStreamInfo ti;
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        if ((ret = init_get_bits8(&gb, buf, buf_size)) < 0)
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            return buf_size;
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        if (!ff_tak_decode_frame_header(avctx, &gb, &ti, 127))
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            s->duration = t->ti.last_frame_samples ? t->ti.last_frame_samples
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                                                   : t->ti.frame_samples;
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        return buf_size;
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    }
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28677
    while (buf_size || t->index + needed <= pc->index) {
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27688
        if (buf_size && t->index + TAK_MAX_FRAME_HEADER_BYTES > pc->index) {
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27687
            int tmp_buf_size       = FFMIN(TAK_MAX_FRAME_HEADER_BYTES,
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                                           buf_size);
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27687
            const uint8_t *tmp_buf = buf;
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27687
            if (ff_combine_frame(pc, END_NOT_FOUND, &tmp_buf, &tmp_buf_size) != -1)
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                goto fail;
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27687
            consumed += tmp_buf_size;
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27687
            buf      += tmp_buf_size;
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27687
            buf_size -= tmp_buf_size;
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        }
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1037901
        for (; t->index + needed <= pc->index; t->index++) {
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1010250
            if (pc->buffer[ t->index     ] == 0xFF &&
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3663
                pc->buffer[ t->index + 1 ] == 0xA0) {
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                TAKStreamInfo ti;
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                if ((ret = init_get_bits8(&gb, pc->buffer + t->index,
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86
                                          pc->index - t->index)) < 0)
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                    goto fail;
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                if (!ff_tak_decode_frame_header(avctx, &gb,
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169
                        pc->frame_start_found ? &ti : &t->ti, 127) &&
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                    !ff_tak_check_crc(pc->buffer + t->index,
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83
                                      get_bits_count(&gb) / 8)) {
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75
                    if (!pc->frame_start_found) {
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38
                        pc->frame_start_found = 1;
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76
                        s->duration           = t->ti.last_frame_samples ?
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38
                                                t->ti.last_frame_samples :
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                                                t->ti.frame_samples;
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38
                        s->key_frame          = !!(t->ti.flags & TAK_FRAME_FLAG_HAS_INFO);
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                    } else {
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37
                        pc->frame_start_found = 0;
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37
                        next                  = t->index - pc->index;
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37
                        t->index              = 0;
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37
                        goto found;
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                    }
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                }
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            }
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        }
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    }
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989
found:
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1065
    if (consumed && !buf_size && next == END_NOT_FOUND ||
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39
        ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
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987
        goto fail;
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    }
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110
39
    if (next != END_NOT_FOUND) {
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37
        next        += consumed;
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37
        pc->overread = FFMAX(0, -next);
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    }
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115
39
    *poutbuf      = buf;
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39
    *poutbuf_size = buf_size;
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39
    return next;
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119
987
fail:
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987
    *poutbuf      = NULL;
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987
    *poutbuf_size = 0;
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987
    return buf_size + consumed;
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}
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AVCodecParser ff_tak_parser = {
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    .codec_ids      = { AV_CODEC_ID_TAK },
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    .priv_data_size = sizeof(TAKParseContext),
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    .parser_parse   = tak_parse,
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    .parser_close   = ff_parse_close,
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};