1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
/*****************************************************************
* gmerlin-avdecoder - a general purpose multimedia decoding library
*
* Copyright (c) 2001 - 2012 Members of the Gmerlin project
* gmerlin-general@lists.sourceforge.net
* http://gmerlin.sourceforge.net
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
* *****************************************************************/
#include <opus.h>
#include <stdlib.h>
#include <config.h>
#include <avdec_private.h>
#include <parser.h>
#include <audioparser_priv.h>
#include <opus_header.h>
typedef struct
{
int64_t pts_offset;
} opus_priv_t;
static int get_format(bgav_audio_parser_t * parser)
{
int ret = 0;
bgav_opus_header_t h;
bgav_input_context_t * input_mem;
opus_priv_t * p = parser->priv;
input_mem = bgav_input_open_memory(parser->s->ci.global_header,
parser->s->ci.global_header_len,
parser->s->opt);
if(!bgav_opus_header_read(input_mem, &h))
goto fail;
bgav_opus_set_channel_setup(&h, parser->s->data.audio.format);
if(parser->s->opt->dump_headers)
bgav_opus_header_dump(&h);
parser->s->ci.pre_skip = h.pre_skip;
p->pts_offset = - ((int)parser->s->ci.pre_skip);
ret = 1;
fail:
bgav_input_close(input_mem);
bgav_input_destroy(input_mem);
return ret;
}
static int parse_frame_opus(bgav_audio_parser_t * parser, bgav_packet_t * p)
{
opus_priv_t * priv = parser->priv;
int nb_frames = opus_packet_get_nb_frames(p->data, p->data_size);
if(!parser->have_format)
return 0;
parser->timestamp += priv->pts_offset;
priv->pts_offset = 0;
if (nb_frames < 1)
p->duration = nb_frames;
else
p->duration =
opus_packet_get_samples_per_frame(p->data, 48000) * nb_frames;
return 1;
}
static void cleanup_opus(bgav_audio_parser_t * parser)
{
opus_priv_t * p = parser->priv;
free(p);
}
static void reset_opus(bgav_audio_parser_t * parser)
{
opus_priv_t * p = parser->priv;
p->pts_offset = -((int64_t)parser->s->ci.pre_skip);
}
void bgav_audio_parser_init_opus(bgav_audio_parser_t * parser)
{
opus_priv_t * priv = calloc(1, sizeof(*priv));
parser->priv = priv;
if(get_format(parser))
parser->have_format = 1;
parser->parse_frame = parse_frame_opus;
parser->cleanup = cleanup_opus;
parser->reset = reset_opus;
}
|
