1// Copyright (c) 2012 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#include "media/base/audio_decoder_config.h" 6 7#include "base/logging.h" 8#include "base/metrics/histogram.h" 9#include "media/audio/sample_rates.h" 10#include "media/base/limits.h" 11#include "media/base/sample_format.h" 12 13namespace media { 14 15AudioDecoderConfig::AudioDecoderConfig() 16 : codec_(kUnknownAudioCodec), 17 sample_format_(kUnknownSampleFormat), 18 bytes_per_channel_(0), 19 channel_layout_(CHANNEL_LAYOUT_UNSUPPORTED), 20 samples_per_second_(0), 21 bytes_per_frame_(0), 22 is_encrypted_(false) { 23} 24 25AudioDecoderConfig::AudioDecoderConfig(AudioCodec codec, 26 SampleFormat sample_format, 27 ChannelLayout channel_layout, 28 int samples_per_second, 29 const uint8* extra_data, 30 size_t extra_data_size, 31 bool is_encrypted) { 32 Initialize(codec, sample_format, channel_layout, samples_per_second, 33 extra_data, extra_data_size, is_encrypted, true); 34} 35 36void AudioDecoderConfig::Initialize(AudioCodec codec, 37 SampleFormat sample_format, 38 ChannelLayout channel_layout, 39 int samples_per_second, 40 const uint8* extra_data, 41 size_t extra_data_size, 42 bool is_encrypted, 43 bool record_stats) { 44 CHECK((extra_data_size != 0) == (extra_data != NULL)); 45 46 if (record_stats) { 47 UMA_HISTOGRAM_ENUMERATION("Media.AudioCodec", codec, kAudioCodecMax); 48 UMA_HISTOGRAM_ENUMERATION("Media.AudioSampleFormat", sample_format, 49 kSampleFormatMax); 50 UMA_HISTOGRAM_ENUMERATION("Media.AudioChannelLayout", channel_layout, 51 CHANNEL_LAYOUT_MAX); 52 AudioSampleRate asr = media::AsAudioSampleRate(samples_per_second); 53 if (asr != kUnexpectedAudioSampleRate) { 54 UMA_HISTOGRAM_ENUMERATION("Media.AudioSamplesPerSecond", asr, 55 kUnexpectedAudioSampleRate); 56 } else { 57 UMA_HISTOGRAM_COUNTS( 58 "Media.AudioSamplesPerSecondUnexpected", samples_per_second); 59 } 60 } 61 62 codec_ = codec; 63 channel_layout_ = channel_layout; 64 samples_per_second_ = samples_per_second; 65 sample_format_ = sample_format; 66 bytes_per_channel_ = SampleFormatToBytesPerChannel(sample_format); 67 extra_data_.assign(extra_data, extra_data + extra_data_size); 68 is_encrypted_ = is_encrypted; 69 70 int channels = ChannelLayoutToChannelCount(channel_layout_); 71 bytes_per_frame_ = channels * bytes_per_channel_; 72} 73 74AudioDecoderConfig::~AudioDecoderConfig() {} 75 76bool AudioDecoderConfig::IsValidConfig() const { 77 return codec_ != kUnknownAudioCodec && 78 channel_layout_ != CHANNEL_LAYOUT_UNSUPPORTED && 79 bytes_per_channel_ > 0 && 80 bytes_per_channel_ <= limits::kMaxBytesPerSample && 81 samples_per_second_ > 0 && 82 samples_per_second_ <= limits::kMaxSampleRate && 83 sample_format_ != kUnknownSampleFormat; 84} 85 86bool AudioDecoderConfig::Matches(const AudioDecoderConfig& config) const { 87 return ((codec() == config.codec()) && 88 (bytes_per_channel() == config.bytes_per_channel()) && 89 (channel_layout() == config.channel_layout()) && 90 (samples_per_second() == config.samples_per_second()) && 91 (extra_data_size() == config.extra_data_size()) && 92 (!extra_data() || !memcmp(extra_data(), config.extra_data(), 93 extra_data_size())) && 94 (is_encrypted() == config.is_encrypted()) && 95 (sample_format() == config.sample_format())); 96} 97 98} // namespace media 99