GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/aac_ac3_parser.c Lines: 48 49 98.0 %
Date: 2020-07-13 04:22:34 Branches: 29 30 96.7 %

Line Branch Exec Source
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/*
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 * Common AAC and AC-3 parser
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 * Copyright (c) 2003 Fabrice Bellard
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 * Copyright (c) 2003 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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#include "libavutil/channel_layout.h"
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#include "libavutil/common.h"
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#include "parser.h"
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#include "aac_ac3_parser.h"
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14748
int ff_aac_ac3_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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14748
    AACAC3ParseContext *s = s1->priv_data;
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14748
    ParseContext *pc = &s->pc;
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    int len, i;
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    int new_frame_start;
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14748
    int got_frame = 0;
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20875
get_next:
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20875
    i=END_NOT_FOUND;
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20875
    if(s->remaining_size <= buf_size){
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17654
        if(s->remaining_size && !s->need_next_header){
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5770
            i= s->remaining_size;
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5770
            s->remaining_size = 0;
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        }else{ //we need a header first
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11884
            len=0;
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74080
            for(i=s->remaining_size; i<buf_size; i++){
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72399
                s->state = (s->state<<8) + buf[i];
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72399
                if((len=s->sync(s->state, s, &s->need_next_header, &new_frame_start)))
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10203
                    break;
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            }
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11884
            if(len<=0){
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1681
                i=END_NOT_FOUND;
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            }else{
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10203
                got_frame = 1;
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10203
                s->state=0;
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10203
                i-= s->header_size -1;
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10203
                s->remaining_size = len;
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10203
                if(!new_frame_start || pc->index+i<=0){
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6127
                    s->remaining_size += i;
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6127
                    goto get_next;
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                }
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4076
                else if (i < 0) {
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                    s->remaining_size += i;
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                }
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            }
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        }
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    }
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14748
    if(ff_combine_frame(pc, i, &buf, &buf_size)<0){
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4789
        s->remaining_size -= FFMIN(s->remaining_size, buf_size);
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4789
        *poutbuf = NULL;
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4789
        *poutbuf_size = 0;
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4789
        return buf_size;
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    }
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9959
    *poutbuf = buf;
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9959
    *poutbuf_size = buf_size;
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    /* update codec info */
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9959
    if(s->codec_id)
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4156
        avctx->codec_id = s->codec_id;
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9959
    if (got_frame) {
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        /* Due to backwards compatible HE-AAC the sample rate, channel count,
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           and total number of samples found in an AAC ADTS header are not
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           reliable. Bit rate is still accurate because the total frame
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           duration in seconds is still correct (as is the number of bits in
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           the frame). */
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9846
        if (avctx->codec_id != AV_CODEC_ID_AAC) {
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4076
            avctx->sample_rate = s->sample_rate;
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4076
            if (avctx->codec_id != AV_CODEC_ID_EAC3) {
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1433
                avctx->channels = s->channels;
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1433
                avctx->channel_layout = s->channel_layout;
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            }
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4076
            s1->duration = s->samples;
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4076
            avctx->audio_service_type = s->service_type;
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        }
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        /* Calculate the average bit rate */
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9846
        s->frame_number++;
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9846
        if (avctx->codec_id != AV_CODEC_ID_EAC3) {
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7203
            avctx->bit_rate =
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7203
                (s->last_bit_rate * (s->frame_number -1) + s->bit_rate)/s->frame_number;
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7203
            s->last_bit_rate = avctx->bit_rate;
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        }
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    }
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9959
    return i;
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}