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// Copyright (c) 2011 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/audio/audio_parameters.h"
#include "media/base/limits.h"
AudioParameters::AudioParameters()
: format(AUDIO_PCM_LINEAR),
channel_layout(CHANNEL_LAYOUT_NONE),
sample_rate(0),
bits_per_sample(0),
samples_per_packet(0),
channels(0) {
}
AudioParameters::AudioParameters(Format format, ChannelLayout channel_layout,
int sample_rate, int bits_per_sample,
int samples_per_packet)
: format(format),
channel_layout(channel_layout),
sample_rate(sample_rate),
bits_per_sample(bits_per_sample),
samples_per_packet(samples_per_packet),
channels(ChannelLayoutToChannelCount(channel_layout)) {
}
bool AudioParameters::IsValid() const {
return (format >= 0) && (format < AUDIO_LAST_FORMAT) &&
(channels > 0) && (channels <= media::Limits::kMaxChannels) &&
(sample_rate > 0) && (sample_rate <= media::Limits::kMaxSampleRate) &&
(bits_per_sample > 0) &&
(bits_per_sample <= media::Limits::kMaxBitsPerSample) &&
(samples_per_packet > 0) &&
(samples_per_packet <= media::Limits::kMaxSamplesPerPacket);
}
int AudioParameters::GetPacketSize() const {
return samples_per_packet * channels * bits_per_sample / 8;
}
int AudioParameters::GetBytesPerSecond() const {
return sample_rate * channels * bits_per_sample / 8;
}
bool AudioParameters::Compare::operator()(
const AudioParameters& a,
const AudioParameters& b) const {
if (a.format < b.format)
return true;
if (a.format > b.format)
return false;
if (a.channels < b.channels)
return true;
if (a.channels > b.channels)
return false;
if (a.sample_rate < b.sample_rate)
return true;
if (a.sample_rate > b.sample_rate)
return false;
if (a.bits_per_sample < b.bits_per_sample)
return true;
if (a.bits_per_sample > b.bits_per_sample)
return false;
return a.samples_per_packet < b.samples_per_packet;
}
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