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
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/base/audio_decoder_config.h"
#include "base/logging.h"
#include "base/metrics/histogram.h"
#include "media/audio/sample_rates.h"
#include "media/base/limits.h"
namespace media {
static int SampleFormatToBitsPerChannel(SampleFormat sample_format) {
switch (sample_format) {
case kUnknownSampleFormat:
return 0;
case kSampleFormatU8:
return 8;
case kSampleFormatS16:
case kSampleFormatPlanarS16:
return 16;
case kSampleFormatS32:
case kSampleFormatF32:
case kSampleFormatPlanarF32:
return 32;
case kSampleFormatMax:
break;
}
NOTREACHED() << "Invalid sample format provided: " << sample_format;
return 0;
}
AudioDecoderConfig::AudioDecoderConfig()
: codec_(kUnknownAudioCodec),
sample_format_(kUnknownSampleFormat),
bits_per_channel_(0),
channel_layout_(CHANNEL_LAYOUT_UNSUPPORTED),
samples_per_second_(0),
bytes_per_frame_(0),
extra_data_size_(0),
is_encrypted_(false) {
}
AudioDecoderConfig::AudioDecoderConfig(AudioCodec codec,
SampleFormat sample_format,
ChannelLayout channel_layout,
int samples_per_second,
const uint8* extra_data,
size_t extra_data_size,
bool is_encrypted) {
Initialize(codec, sample_format, channel_layout, samples_per_second,
extra_data, extra_data_size, is_encrypted, true);
}
void AudioDecoderConfig::Initialize(AudioCodec codec,
SampleFormat sample_format,
ChannelLayout channel_layout,
int samples_per_second,
const uint8* extra_data,
size_t extra_data_size,
bool is_encrypted,
bool record_stats) {
CHECK((extra_data_size != 0) == (extra_data != NULL));
if (record_stats) {
UMA_HISTOGRAM_ENUMERATION("Media.AudioCodec", codec, kAudioCodecMax);
UMA_HISTOGRAM_ENUMERATION("Media.AudioSampleFormat", sample_format,
kSampleFormatMax);
UMA_HISTOGRAM_ENUMERATION("Media.AudioChannelLayout", channel_layout,
CHANNEL_LAYOUT_MAX);
AudioSampleRate asr = media::AsAudioSampleRate(samples_per_second);
if (asr != kUnexpectedAudioSampleRate) {
UMA_HISTOGRAM_ENUMERATION("Media.AudioSamplesPerSecond", asr,
kUnexpectedAudioSampleRate);
} else {
UMA_HISTOGRAM_COUNTS(
"Media.AudioSamplesPerSecondUnexpected", samples_per_second);
}
}
codec_ = codec;
channel_layout_ = channel_layout;
samples_per_second_ = samples_per_second;
extra_data_size_ = extra_data_size;
sample_format_ = sample_format;
bits_per_channel_ = SampleFormatToBitsPerChannel(sample_format);
if (extra_data_size_ > 0) {
extra_data_.reset(new uint8[extra_data_size_]);
memcpy(extra_data_.get(), extra_data, extra_data_size_);
} else {
extra_data_.reset();
}
is_encrypted_ = is_encrypted;
int channels = ChannelLayoutToChannelCount(channel_layout_);
bytes_per_frame_ = channels * bits_per_channel_ / 8;
}
AudioDecoderConfig::~AudioDecoderConfig() {}
bool AudioDecoderConfig::IsValidConfig() const {
return codec_ != kUnknownAudioCodec &&
channel_layout_ != CHANNEL_LAYOUT_UNSUPPORTED &&
bits_per_channel_ > 0 &&
bits_per_channel_ <= limits::kMaxBitsPerSample &&
samples_per_second_ > 0 &&
samples_per_second_ <= limits::kMaxSampleRate &&
sample_format_ != kUnknownSampleFormat;
}
bool AudioDecoderConfig::Matches(const AudioDecoderConfig& config) const {
return ((codec() == config.codec()) &&
(bits_per_channel() == config.bits_per_channel()) &&
(channel_layout() == config.channel_layout()) &&
(samples_per_second() == config.samples_per_second()) &&
(extra_data_size() == config.extra_data_size()) &&
(!extra_data() || !memcmp(extra_data(), config.extra_data(),
extra_data_size())) &&
(is_encrypted() == config.is_encrypted()) &&
(sample_format() == config.sample_format()));
}
void AudioDecoderConfig::CopyFrom(const AudioDecoderConfig& audio_config) {
Initialize(audio_config.codec(),
audio_config.sample_format(),
audio_config.channel_layout(),
audio_config.samples_per_second(),
audio_config.extra_data(),
audio_config.extra_data_size(),
audio_config.is_encrypted(),
false);
}
} // namespace media
|
