-
Notifications
You must be signed in to change notification settings - Fork 50
Expand file tree
/
Copy pathOutputStream.cpp
More file actions
105 lines (91 loc) · 3.58 KB
/
Copy pathOutputStream.cpp
File metadata and controls
105 lines (91 loc) · 3.58 KB
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
#include "OutputStream.hpp"
#include <AvTranscoder/file/OutputFile.hpp>
#include <cassert>
namespace avtranscoder
{
OutputStream::OutputStream(OutputFile& outputFile, const size_t streamIndex)
: IOutputStream()
, _outputFile(outputFile)
, _outputAVStream(outputFile.getFormatContext().getAVStream(streamIndex))
, _streamIndex(streamIndex)
, _wrappedPacketsDuration(0)
, _lastWrappedPacketDuration(0)
, _isPTSGenerated(false)
{
}
float OutputStream::getStreamDuration() const
{
const AVFrac& outputPTS = _outputAVStream.pts;
const AVRational& outputTimeBase = _outputAVStream.time_base;
// check floating point exception
if(outputTimeBase.den == 0 || outputPTS.den == 0)
{
LOG_WARN("Cannot compute stream duration of output stream at index " << _streamIndex)
return 0.f;
}
if(_wrappedPacketsDuration)
return av_q2d(outputTimeBase) * _wrappedPacketsDuration;
#if AVTRANSCODER_FFMPEG_DEPENDENCY && LIBAVFORMAT_VERSION_INT >= AV_VERSION_INT(55, 40, 100)
// returns the pts of the last muxed packet, converted from timebase to seconds
return av_q2d(outputTimeBase) * av_stream_get_end_pts(&_outputAVStream);
#else
return av_q2d(outputTimeBase) * (outputPTS.val + (outputPTS.num / outputPTS.den));
#endif
}
size_t OutputStream::getNbFrames() const
{
return _outputAVStream.nb_frames;
}
int OutputStream::getStreamPTS() const
{
const AVFrac& outputPTS = _outputAVStream.pts;
return (outputPTS.val + (outputPTS.num / outputPTS.den));
}
IOutputStream::EWrappingStatus OutputStream::wrap(const CodedData& data)
{
// If stream PTS will be generated at rewrap time
if(!_isPTSGenerated && (data.getAVPacket().pts == 0 || data.getAVPacket().pts == AV_NOPTS_VALUE) &&
data.getAVPacket().dts == AV_NOPTS_VALUE)
{
LOG_WARN("PTS of output stream " << _streamIndex << " is generated at rewrap time.")
_isPTSGenerated = true;
}
// wrap packet
IOutputStream::EWrappingStatus status = _outputFile.wrap(data, _streamIndex);
// Store duration of the last packet wrapped
if(data.getAVPacket().duration != 0 && data.getAVPacket().duration != _lastWrappedPacketDuration)
_lastWrappedPacketDuration = data.getAVPacket().duration;
// Append duration of the packet to the stream
if(data.getAVPacket().duration)
_wrappedPacketsDuration += data.getAVPacket().duration;
else
{
switch(_outputAVStream.codec->codec_type)
{
case AVMEDIA_TYPE_VIDEO:
{
_wrappedPacketsDuration += _lastWrappedPacketDuration;
break;
}
case AVMEDIA_TYPE_AUDIO:
{
Rational audioPacketDuration;
audioPacketDuration.num = 0;
audioPacketDuration.den = 0;
const int frame_size = av_get_audio_frame_duration(_outputAVStream.codec, data.getSize());
if(frame_size <= 0 || _outputAVStream.codec->sample_rate <= 0)
break;
audioPacketDuration.num = frame_size;
audioPacketDuration.den = _outputAVStream.codec->sample_rate;
_wrappedPacketsDuration += av_rescale(1, audioPacketDuration.num * (int64_t)_outputAVStream.time_base.den *
_outputAVStream.codec->ticks_per_frame,
audioPacketDuration.den * (int64_t)_outputAVStream.time_base.num);
break;
}
default:
break;
}
}
return status;
}
}