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
|
// 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),
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;
sample_format_ = sample_format;
bits_per_channel_ = SampleFormatToBitsPerChannel(sample_format);
extra_data_.assign(extra_data, extra_data + extra_data_size);
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()));
}
} // namespace media
|
