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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "MediaInfo.h"
namespace mozilla {
typedef AudioConfig::ChannelLayout ChannelLayout;
/**
* AudioConfig::ChannelLayout
*/
/*
SMPTE channel layout (also known as wave order)
DUAL-MONO L R
DUAL-MONO-LFE L R LFE
MONO M
MONO-LFE M LFE
STEREO L R
STEREO-LFE L R LFE
3F L R C
3F-LFE L R C LFE
2F1 L R S
2F1-LFE L R LFE S
3F1 L R C S
3F1-LFE L R C LFE S
2F2 L R LS RS
2F2-LFE L R LFE LS RS
3F2 L R C LS RS
3F2-LFE L R C LFE LS RS
3F3R-LFE L R C LFE BC LS RS
3F4-LFE L R C LFE Rls Rrs LS RS
*/
void
AudioConfig::ChannelLayout::UpdateChannelMap()
{
mChannelMap = 0;
mValid = mChannels.Length() <= MAX_AUDIO_CHANNELS;
for (size_t i = 0; i < mChannels.Length() && i <= MAX_AUDIO_CHANNELS; i++) {
uint32_t mask = 1 << mChannels[i];
if (mChannels[i] == CHANNEL_INVALID || (mChannelMap & mask)) {
mValid = false;
}
mChannelMap |= mask;
}
}
/* static */ const AudioConfig::Channel*
AudioConfig::ChannelLayout::SMPTEDefault(uint32_t aChannels) const
{
switch (aChannels) {
case 1: // MONO
{
static const Channel config[] = { CHANNEL_MONO };
return config;
}
case 2: // STEREO
{
static const Channel config[] = { CHANNEL_LEFT, CHANNEL_RIGHT };
return config;
}
case 3: // 3F
{
static const Channel config[] = { CHANNEL_LEFT, CHANNEL_RIGHT, CHANNEL_CENTER };
return config;
}
case 4: // 2F2
{
static const Channel config[] = { CHANNEL_LEFT, CHANNEL_RIGHT, CHANNEL_LS, CHANNEL_RS };
return config;
}
case 5: // 3F2
{
static const Channel config[] = { CHANNEL_LEFT, CHANNEL_RIGHT, CHANNEL_CENTER, CHANNEL_LS, CHANNEL_RS };
return config;
}
case 6: // 3F2-LFE
{
static const Channel config[] = { CHANNEL_LEFT, CHANNEL_RIGHT, CHANNEL_CENTER, CHANNEL_LFE, CHANNEL_LS, CHANNEL_RS };
return config;
}
case 7: // 3F3R-LFE
{
static const Channel config[] = { CHANNEL_LEFT, CHANNEL_RIGHT, CHANNEL_CENTER, CHANNEL_LFE, CHANNEL_RCENTER, CHANNEL_LS, CHANNEL_RS };
return config;
}
case 8: // 3F4-LFE
{
static const Channel config[] = { CHANNEL_LEFT, CHANNEL_RIGHT, CHANNEL_CENTER, CHANNEL_LFE, CHANNEL_RLS, CHANNEL_RRS, CHANNEL_LS, CHANNEL_RS };
return config;
}
default:
return nullptr;
}
}
bool
AudioConfig::ChannelLayout::MappingTable(const ChannelLayout& aOther,
uint8_t* aMap) const
{
if (!IsValid() || !aOther.IsValid() ||
Map() != aOther.Map()) {
return false;
}
if (!aMap) {
return true;
}
for (uint32_t i = 0; i < Count(); i++) {
for (uint32_t j = 0; j < Count(); j++) {
if (aOther[j] == mChannels[i]) {
aMap[j] = i;
break;
}
}
}
return true;
}
/**
* AudioConfig::ChannelConfig
*/
/* static */ const char*
AudioConfig::FormatToString(AudioConfig::SampleFormat aFormat)
{
switch (aFormat) {
case FORMAT_U8: return "unsigned 8 bit";
case FORMAT_S16: return "signed 16 bit";
case FORMAT_S24: return "signed 24 bit MSB";
case FORMAT_S24LSB: return "signed 24 bit LSB";
case FORMAT_S32: return "signed 32 bit";
case FORMAT_FLT: return "32 bit floating point";
case FORMAT_NONE: return "none";
default: return "unknown";
}
}
/* static */ uint32_t
AudioConfig::SampleSize(AudioConfig::SampleFormat aFormat)
{
switch (aFormat) {
case FORMAT_U8: return 1;
case FORMAT_S16: return 2;
case FORMAT_S24: MOZ_FALLTHROUGH;
case FORMAT_S24LSB: MOZ_FALLTHROUGH;
case FORMAT_S32: MOZ_FALLTHROUGH;
case FORMAT_FLT: return 4;
case FORMAT_NONE:
default: return 0;
}
}
/* static */ uint32_t
AudioConfig::FormatToBits(AudioConfig::SampleFormat aFormat)
{
switch (aFormat) {
case FORMAT_U8: return 8;
case FORMAT_S16: return 16;
case FORMAT_S24LSB: MOZ_FALLTHROUGH;
case FORMAT_S24: return 24;
case FORMAT_S32: MOZ_FALLTHROUGH;
case FORMAT_FLT: return 32;
case FORMAT_NONE: MOZ_FALLTHROUGH;
default: return 0;
}
}
AudioConfig::AudioConfig(const ChannelLayout& aChannelLayout, uint32_t aRate,
AudioConfig::SampleFormat aFormat, bool aInterleaved)
: mChannelLayout(aChannelLayout)
, mChannels(aChannelLayout.Count())
, mRate(aRate)
, mFormat(aFormat)
, mInterleaved(aInterleaved)
{}
AudioConfig::AudioConfig(uint32_t aChannels, uint32_t aRate,
AudioConfig::SampleFormat aFormat, bool aInterleaved)
: mChannelLayout(aChannels)
, mChannels(aChannels)
, mRate(aRate)
, mFormat(aFormat)
, mInterleaved(aInterleaved)
{}
} // namespace mozilla
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