FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavcodec/aac_ac3_parser.c	Lines:	47	48	97.9 %
Date:	2021-01-26 11:44:58	Branches:	29	30	96.7 %


/*
 * Common AAC and AC-3 parser
 * Copyright (c) 2003 Fabrice Bellard
 * Copyright (c) 2003 Michael Niedermayer
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "parser.h"
#include "aac_ac3_parser.h"

int ff_aac_ac3_parse(AVCodecParserContext *s1,
                     AVCodecContext *avctx,
                     const uint8_t **poutbuf, int *poutbuf_size,
                     const uint8_t *buf, int buf_size)
{
    AACAC3ParseContext *s = s1->priv_data;
    ParseContext *pc = &s->pc;
    int len, i;
    int new_frame_start;
    int got_frame = 0;

get_next:
    i=END_NOT_FOUND;
    if(s->remaining_size <= buf_size){
        if(s->remaining_size && !s->need_next_header){
            i= s->remaining_size;
            s->remaining_size = 0;
        }else{ //we need a header first
            len=0;
            for(i=s->remaining_size; i<buf_size; i++){
                s->state = (s->state<<8) + buf[i];
                if((len=s->sync(s->state, s, &s->need_next_header, &new_frame_start)))
                    break;
            }
            if(len<=0){
                i=END_NOT_FOUND;
            }else{
                got_frame = 1;
                s->state=0;
                i-= s->header_size -1;
                s->remaining_size = len;
                if(!new_frame_start || pc->index+i<=0){
                    s->remaining_size += i;
                    goto get_next;
                }
                else if (i < 0) {
                    s->remaining_size += i;
                }
            }
        }
    }

    if(ff_combine_frame(pc, i, &buf, &buf_size)<0){
        s->remaining_size -= FFMIN(s->remaining_size, buf_size);
        *poutbuf = NULL;
        *poutbuf_size = 0;
        return buf_size;
    }

    *poutbuf = buf;
    *poutbuf_size = buf_size;

    /* update codec info */
    if(s->codec_id)
        avctx->codec_id = s->codec_id;

    if (got_frame) {
        /* Due to backwards compatible HE-AAC the sample rate, channel count,
           and total number of samples found in an AAC ADTS header are not
           reliable. Bit rate is still accurate because the total frame
           duration in seconds is still correct (as is the number of bits in
           the frame). */
        if (avctx->codec_id != AV_CODEC_ID_AAC) {
            avctx->sample_rate = s->sample_rate;
            if (avctx->codec_id != AV_CODEC_ID_EAC3) {
                avctx->channels = s->channels;
                avctx->channel_layout = s->channel_layout;
            }
            s1->duration = s->samples;
            avctx->audio_service_type = s->service_type;
        }

        /* Calculate the average bit rate */
        s->frame_number++;
        if (avctx->codec_id != AV_CODEC_ID_EAC3) {
            avctx->bit_rate +=
                (s->bit_rate - avctx->bit_rate) / s->frame_number;
        }
    }

    return i;
}


Generated by: GCOVR (Version 4.2)

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		14748	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		14748	AACAC3ParseContext *s = s1->priv_data;
34		14748	ParseContext *pc = &s->pc;
35			int len, i;
36			int new_frame_start;
37		14748	int got_frame = 0;
38
39		20875	get_next:
40		20875	i=END_NOT_FOUND;
41	✓✓	20875	if(s->remaining_size <= buf_size){
42	✓✓✓✓	17654	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		11884	len=0;
47	✓✓	74080	for(i=s->remaining_size; i<buf_size; i++){
48		72399	s->state = (s->state<<8) + buf[i];
49	✓✓	72399	if((len=s->sync(s->state, s, &s->need_next_header, &new_frame_start)))
50		10203	break;
51			}
52	✓✓	11884	if(len<=0){
53		1681	i=END_NOT_FOUND;
54			}else{
55		10203	got_frame = 1;
56		10203	s->state=0;
57		10203	i-= s->header_size -1;
58		10203	s->remaining_size = len;
59	✓✓✓✓	10203	if(!new_frame_start \|\| pc->index+i<=0){
60		6127	s->remaining_size += i;
61		6127	goto get_next;
62			}
63	✗✓	4076	else if (i < 0) {
64			s->remaining_size += i;
65			}
66			}
67			}
68			}
69
70	✓✓	14748	if(ff_combine_frame(pc, i, &buf, &buf_size)<0){
71		4789	s->remaining_size -= FFMIN(s->remaining_size, buf_size);
72		4789	*poutbuf = NULL;
73		4789	*poutbuf_size = 0;
74		4789	return buf_size;
75			}
76
77		9959	*poutbuf = buf;
78		9959	*poutbuf_size = buf_size;
79
80			/* update codec info */
81	✓✓	9959	if(s->codec_id)
82		4156	avctx->codec_id = s->codec_id;
83
84	✓✓	9959	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	✓✓	9846	if (avctx->codec_id != AV_CODEC_ID_AAC) {
91		4076	avctx->sample_rate = s->sample_rate;
92	✓✓	4076	if (avctx->codec_id != AV_CODEC_ID_EAC3) {
93		1433	avctx->channels = s->channels;
94		1433	avctx->channel_layout = s->channel_layout;
95			}
96		4076	s1->duration = s->samples;
97		4076	avctx->audio_service_type = s->service_type;
98			}
99
100			/* Calculate the average bit rate */
101		9846	s->frame_number++;
102	✓✓	9846	if (avctx->codec_id != AV_CODEC_ID_EAC3) {
103		7203	avctx->bit_rate +=
104		7203	(s->bit_rate - avctx->bit_rate) / s->frame_number;
105			}
106			}
107
108		9959	return i;
109			}