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// 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 {
AudioDecoderConfig::AudioDecoderConfig()
: codec_(kUnknownAudioCodec),
bits_per_channel_(0),
channel_layout_(CHANNEL_LAYOUT_UNSUPPORTED),
samples_per_second_(0),
extra_data_size_(0),
is_encrypted_(false) {
}
AudioDecoderConfig::AudioDecoderConfig(AudioCodec codec,
int bits_per_channel,
ChannelLayout channel_layout,
int samples_per_second,
const uint8* extra_data,
size_t extra_data_size,
bool is_encrypted) {
Initialize(codec, bits_per_channel, channel_layout, samples_per_second,
extra_data, extra_data_size, is_encrypted, true);
}
void AudioDecoderConfig::Initialize(AudioCodec codec,
int bits_per_channel,
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 + 1);
// Fake enum histogram to get exact integral buckets. Expect to never see
// any values over 32 and even that is huge.
UMA_HISTOGRAM_ENUMERATION("Media.AudioBitsPerChannel", bits_per_channel,
40);
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;
bits_per_channel_ = bits_per_channel;
channel_layout_ = channel_layout;
samples_per_second_ = samples_per_second;
extra_data_size_ = extra_data_size;
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;
}
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;
}
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()));
}
void AudioDecoderConfig::CopyFrom(const AudioDecoderConfig& audio_config) {
Initialize(audio_config.codec(),
audio_config.bits_per_channel(),
audio_config.channel_layout(),
audio_config.samples_per_second(),
audio_config.extra_data(),
audio_config.extra_data_size(),
audio_config.is_encrypted(),
false);
}
AudioCodec AudioDecoderConfig::codec() const {
return codec_;
}
int AudioDecoderConfig::bits_per_channel() const {
return bits_per_channel_;
}
ChannelLayout AudioDecoderConfig::channel_layout() const {
return channel_layout_;
}
int AudioDecoderConfig::samples_per_second() const {
return samples_per_second_;
}
uint8* AudioDecoderConfig::extra_data() const {
return extra_data_.get();
}
size_t AudioDecoderConfig::extra_data_size() const {
return extra_data_size_;
}
bool AudioDecoderConfig::is_encrypted() const {
return is_encrypted_;
}
} // namespace media
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