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
|
#include <sndfile.h>
#include "external_audio_decoder.h"
#include "film.h"
#include "exceptions.h"
using std::vector;
using std::string;
using std::min;
using boost::shared_ptr;
ExternalAudioDecoder::ExternalAudioDecoder (shared_ptr<Film> f, shared_ptr<const Options> o, Job* j)
: Decoder (f, o, j)
, AudioDecoder (f, o, j)
{
}
bool
ExternalAudioDecoder::pass ()
{
vector<string> const files = _film->external_audio ();
int N = 0;
for (size_t i = 0; i < files.size(); ++i) {
if (!files[i].empty()) {
N = i + 1;
}
}
if (N == 0) {
return true;
}
bool first = true;
sf_count_t frames = 0;
vector<SNDFILE*> sndfiles;
for (vector<string>::const_iterator i = files.begin(); i != files.end(); ++i) {
if (i->empty ()) {
sndfiles.push_back (0);
} else {
SF_INFO info;
SNDFILE* s = sf_open (i->c_str(), SFM_READ, &info);
if (!s) {
throw DecodeError ("could not open external audio file for reading");
}
if (info.channels != 1) {
throw DecodeError ("external audio files must be mono");
}
sndfiles.push_back (s);
if (first) {
/* XXX: nasty magic value */
AudioStream st ("DVDOMATIC-EXTERNAL", -1, info.samplerate, av_get_default_channel_layout (info.channels));
_audio_streams.push_back (st);
_audio_stream = st;
frames = info.frames;
first = false;
} else {
if (info.frames != frames) {
throw DecodeError ("external audio files have differing lengths");
}
}
}
}
sf_count_t const block = 65536;
shared_ptr<AudioBuffers> audio (new AudioBuffers (_audio_stream.get().channels(), block));
while (frames > 0) {
sf_count_t const this_time = min (block, frames);
for (size_t i = 0; i < sndfiles.size(); ++i) {
if (!sndfiles[i]) {
audio->make_silent (i);
} else {
sf_read_float (sndfiles[i], audio->data(i), block);
}
}
Audio (audio);
frames -= this_time;
}
return true;
}
|
