GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/adx_parser.c Lines: 0 32 0.0 %
Date: 2019-11-20 04:07:19 Branches: 0 20 0.0 %

Line Branch Exec Source
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/*
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 * Copyright (c) 2011  Justin Ruggles
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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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 * ADX audio parser
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 *
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 * Splits packets into individual blocks.
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 */
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#include "libavutil/intreadwrite.h"
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#include "parser.h"
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#include "adx.h"
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typedef struct ADXParseContext {
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    ParseContext pc;
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    int header_size;
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    int block_size;
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    int remaining;
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} ADXParseContext;
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static int adx_parse(AVCodecParserContext *s1,
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                           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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    ADXParseContext *s = s1->priv_data;
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    ParseContext *pc = &s->pc;
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    int next = END_NOT_FOUND;
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    int i;
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    uint64_t state = pc->state64;
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    if (!s->header_size) {
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        for (i = 0; i < buf_size; i++) {
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            state = (state << 8) | buf[i];
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            /* check for fixed fields in ADX header for possible match */
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            if ((state & 0xFFFF0000FFFFFF00) == 0x8000000003120400ULL) {
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                int channels    = state & 0xFF;
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                int header_size = ((state >> 32) & 0xFFFF) + 4;
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                if (channels > 0 && header_size >= 8) {
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                    s->header_size = header_size;
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                    s->block_size  = BLOCK_SIZE * channels;
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                    s->remaining   = i - 7 + s->header_size + s->block_size;
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                    break;
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                }
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            }
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        }
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        pc->state64 = state;
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    }
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    if (s->header_size) {
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        if (!s->remaining)
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            s->remaining = s->block_size;
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        if (s->remaining <= buf_size) {
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            next = s->remaining;
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            s->remaining = 0;
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        } else
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            s->remaining -= buf_size;
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    }
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    if (ff_combine_frame(pc, next, &buf, &buf_size) < 0 || !buf_size) {
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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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    s1->duration = BLOCK_SAMPLES;
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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_adx_parser = {
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    .codec_ids      = { AV_CODEC_ID_ADPCM_ADX },
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    .priv_data_size = sizeof(ADXParseContext),
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    .parser_parse   = adx_parse,
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    .parser_close   = ff_parse_close,
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};