GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/aac_ac3_parser.c Lines: 45 46 97.8 %
Date: 2019-11-18 18:00:01 Branches: 29 30 96.7 %

Line Branch Exec Source
1
/*
2
 * Common AAC and AC-3 parser
3
 * Copyright (c) 2003 Fabrice Bellard
4
 * Copyright (c) 2003 Michael Niedermayer
5
 *
6
 * This file is part of FFmpeg.
7
 *
8
 * FFmpeg is free software; you can redistribute it and/or
9
 * modify it under the terms of the GNU Lesser General Public
10
 * License as published by the Free Software Foundation; either
11
 * version 2.1 of the License, or (at your option) any later version.
12
 *
13
 * FFmpeg is distributed in the hope that it will be useful,
14
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16
 * Lesser General Public License for more details.
17
 *
18
 * You should have received a copy of the GNU Lesser General Public
19
 * License along with FFmpeg; if not, write to the Free Software
20
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21
 */
22
23
#include "libavutil/channel_layout.h"
24
#include "libavutil/common.h"
25
#include "parser.h"
26
#include "aac_ac3_parser.h"
27
28
13972
int ff_aac_ac3_parse(AVCodecParserContext *s1,
29
                     AVCodecContext *avctx,
30
                     const uint8_t **poutbuf, int *poutbuf_size,
31
                     const uint8_t *buf, int buf_size)
32
{
33
13972
    AACAC3ParseContext *s = s1->priv_data;
34
13972
    ParseContext *pc = &s->pc;
35
    int len, i;
36
    int new_frame_start;
37
13972
    int got_frame = 0;
38
39
20094
get_next:
40
20094
    i=END_NOT_FOUND;
41
20094
    if(s->remaining_size <= buf_size){
42

17308
        if(s->remaining_size && !s->need_next_header){
43
5770
            i= s->remaining_size;
44
5770
            s->remaining_size = 0;
45
        }else{ //we need a header first
46
11538
            len=0;
47
72054
            for(i=s->remaining_size; i<buf_size; i++){
48
70439
                s->state = (s->state<<8) + buf[i];
49
70439
                if((len=s->sync(s->state, s, &s->need_next_header, &new_frame_start)))
50
9923
                    break;
51
            }
52
11538
            if(len<=0){
53
1615
                i=END_NOT_FOUND;
54
            }else{
55
9923
                got_frame = 1;
56
9923
                s->state=0;
57
9923
                i-= s->header_size -1;
58
9923
                s->remaining_size = len;
59

9923
                if(!new_frame_start || pc->index+i<=0){
60
6122
                    s->remaining_size += i;
61
6122
                    goto get_next;
62
                }
63
3801
                else if (i < 0) {
64
                    s->remaining_size += i;
65
                }
66
            }
67
        }
68
    }
69
70
13972
    if(ff_combine_frame(pc, i, &buf, &buf_size)<0){
71
4299
        s->remaining_size -= FFMIN(s->remaining_size, buf_size);
72
4299
        *poutbuf = NULL;
73
4299
        *poutbuf_size = 0;
74
4299
        return buf_size;
75
    }
76
77
9673
    *poutbuf = buf;
78
9673
    *poutbuf_size = buf_size;
79
80
    /* update codec info */
81
9673
    if(s->codec_id)
82
3871
        avctx->codec_id = s->codec_id;
83
84
9673
    if (got_frame) {
85
        /* Due to backwards compatible HE-AAC the sample rate, channel count,
86
           and total number of samples found in an AAC ADTS header are not
87
           reliable. Bit rate is still accurate because the total frame
88
           duration in seconds is still correct (as is the number of bits in
89
           the frame). */
90
9571
        if (avctx->codec_id != AV_CODEC_ID_AAC) {
91
3801
            avctx->sample_rate = s->sample_rate;
92
3801
            if (avctx->codec_id != AV_CODEC_ID_EAC3) {
93
1158
                avctx->channels = s->channels;
94
1158
                avctx->channel_layout = s->channel_layout;
95
            }
96
3801
            s1->duration = s->samples;
97
3801
            avctx->audio_service_type = s->service_type;
98
        }
99
100
9571
        if (avctx->codec_id != AV_CODEC_ID_EAC3)
101
6928
            avctx->bit_rate = s->bit_rate;
102
    }
103
104
9673
    return i;
105
}