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|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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
*/
ChannelLayout ChannelLayout::LMONO{ AudioConfig::CHANNEL_FRONT_CENTER };
ChannelLayout ChannelLayout::LMONO_LFE{ AudioConfig::CHANNEL_FRONT_CENTER, AudioConfig::CHANNEL_LFE };
ChannelLayout ChannelLayout::LSTEREO{ AudioConfig::CHANNEL_FRONT_LEFT, AudioConfig::CHANNEL_FRONT_RIGHT };
ChannelLayout ChannelLayout::LSTEREO_LFE{ AudioConfig::CHANNEL_FRONT_LEFT,
AudioConfig::CHANNEL_FRONT_RIGHT,
AudioConfig::CHANNEL_LFE };
ChannelLayout ChannelLayout::L3F{ AudioConfig::CHANNEL_FRONT_LEFT,
AudioConfig::CHANNEL_FRONT_RIGHT,
AudioConfig::CHANNEL_FRONT_CENTER };
ChannelLayout ChannelLayout::L3F_LFE{ AudioConfig::CHANNEL_FRONT_LEFT,
AudioConfig::CHANNEL_FRONT_RIGHT,
AudioConfig::CHANNEL_FRONT_CENTER,
AudioConfig::CHANNEL_LFE };
ChannelLayout ChannelLayout::L2F1{ AudioConfig::CHANNEL_FRONT_LEFT,
AudioConfig::CHANNEL_FRONT_RIGHT,
AudioConfig::CHANNEL_BACK_CENTER };
ChannelLayout ChannelLayout::L2F1_LFE{ AudioConfig::CHANNEL_FRONT_LEFT,
AudioConfig::CHANNEL_FRONT_RIGHT,
AudioConfig::CHANNEL_LFE,
AudioConfig::CHANNEL_BACK_CENTER };
ChannelLayout ChannelLayout::L3F1{ AudioConfig::CHANNEL_FRONT_LEFT,
AudioConfig::CHANNEL_FRONT_RIGHT,
AudioConfig::CHANNEL_FRONT_CENTER,
AudioConfig::CHANNEL_BACK_CENTER };
ChannelLayout ChannelLayout::LSURROUND = ChannelLayout::L3F1;
ChannelLayout ChannelLayout::L3F1_LFE{ AudioConfig::CHANNEL_FRONT_LEFT,
AudioConfig::CHANNEL_FRONT_RIGHT,
AudioConfig::CHANNEL_FRONT_CENTER,
AudioConfig::CHANNEL_LFE,
AudioConfig::CHANNEL_BACK_CENTER };
ChannelLayout ChannelLayout::L2F2{ AudioConfig::CHANNEL_FRONT_LEFT,
AudioConfig::CHANNEL_FRONT_RIGHT,
AudioConfig::CHANNEL_SIDE_LEFT,
AudioConfig::CHANNEL_SIDE_RIGHT };
ChannelLayout ChannelLayout::L2F2_LFE{ AudioConfig::CHANNEL_FRONT_LEFT,
AudioConfig::CHANNEL_FRONT_RIGHT,
AudioConfig::CHANNEL_LFE,
AudioConfig::CHANNEL_SIDE_LEFT,
AudioConfig::CHANNEL_SIDE_RIGHT };
ChannelLayout ChannelLayout::LQUAD{ AudioConfig::CHANNEL_FRONT_LEFT,
AudioConfig::CHANNEL_FRONT_RIGHT,
AudioConfig::CHANNEL_BACK_LEFT,
AudioConfig::CHANNEL_BACK_RIGHT };
ChannelLayout ChannelLayout::LQUAD_LFE{ AudioConfig::CHANNEL_FRONT_LEFT,
AudioConfig::CHANNEL_FRONT_RIGHT,
AudioConfig::CHANNEL_LFE,
AudioConfig::CHANNEL_BACK_LEFT,
AudioConfig::CHANNEL_BACK_RIGHT };
ChannelLayout ChannelLayout::L3F2{ AudioConfig::CHANNEL_FRONT_LEFT,
AudioConfig::CHANNEL_FRONT_RIGHT,
AudioConfig::CHANNEL_FRONT_CENTER,
AudioConfig::CHANNEL_SIDE_LEFT,
AudioConfig::CHANNEL_SIDE_RIGHT };
ChannelLayout ChannelLayout::L3F2_LFE{ AudioConfig::CHANNEL_FRONT_LEFT,
AudioConfig::CHANNEL_FRONT_RIGHT,
AudioConfig::CHANNEL_FRONT_CENTER,
AudioConfig::CHANNEL_LFE,
AudioConfig::CHANNEL_SIDE_LEFT,
AudioConfig::CHANNEL_SIDE_RIGHT };
ChannelLayout ChannelLayout::L5POINT1_SURROUND = ChannelLayout::L3F2_LFE;
ChannelLayout ChannelLayout::L3F3R_LFE{ AudioConfig::CHANNEL_FRONT_LEFT,
AudioConfig::CHANNEL_FRONT_RIGHT,
AudioConfig::CHANNEL_FRONT_CENTER,
AudioConfig::CHANNEL_LFE,
AudioConfig::CHANNEL_BACK_CENTER,
AudioConfig::CHANNEL_SIDE_LEFT,
AudioConfig::CHANNEL_SIDE_RIGHT };
ChannelLayout ChannelLayout::L3F4_LFE{ AudioConfig::CHANNEL_FRONT_LEFT,
AudioConfig::CHANNEL_FRONT_RIGHT,
AudioConfig::CHANNEL_FRONT_CENTER,
AudioConfig::CHANNEL_LFE,
AudioConfig::CHANNEL_BACK_LEFT,
AudioConfig::CHANNEL_BACK_RIGHT,
AudioConfig::CHANNEL_SIDE_LEFT,
AudioConfig::CHANNEL_SIDE_RIGHT };
ChannelLayout ChannelLayout::L7POINT1_SURROUND = ChannelLayout::L3F4_LFE;
void
AudioConfig::ChannelLayout::UpdateChannelMap()
{
mValid = mChannels.Length() <= MAX_AUDIO_CHANNELS;
mChannelMap = 0;
if (mValid) {
mChannelMap = Map();
mValid = mChannelMap > 0;
}
}
uint32_t
AudioConfig::ChannelLayout::Map() const
{
if (mChannelMap) {
return mChannelMap;
}
uint32_t map = 0;
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)) {
// Invalid configuration.
return 0;
}
map |= mask;
}
return map;
}
const AudioConfig::Channel*
AudioConfig::ChannelLayout::DefaultLayoutForChannels(uint32_t aChannels) const
{
switch (aChannels) {
case 1: // MONO
{
static const Channel config[] = { CHANNEL_FRONT_CENTER };
return config;
}
case 2: // STEREO
{
static const Channel config[] = { CHANNEL_FRONT_LEFT, CHANNEL_FRONT_RIGHT };
return config;
}
case 3: // 3F
{
static const Channel config[] = { CHANNEL_FRONT_LEFT, CHANNEL_FRONT_RIGHT, CHANNEL_FRONT_CENTER };
return config;
}
case 4: // QUAD
{
static const Channel config[] = { CHANNEL_FRONT_LEFT, CHANNEL_FRONT_RIGHT, CHANNEL_BACK_LEFT, CHANNEL_BACK_RIGHT };
return config;
}
case 5: // 3F2
{
static const Channel config[] = { CHANNEL_FRONT_LEFT, CHANNEL_FRONT_RIGHT, CHANNEL_FRONT_CENTER, CHANNEL_SIDE_LEFT, CHANNEL_SIDE_RIGHT };
return config;
}
case 6: // 3F2-LFE
{
static const Channel config[] = { CHANNEL_FRONT_LEFT, CHANNEL_FRONT_RIGHT, CHANNEL_FRONT_CENTER, CHANNEL_LFE, CHANNEL_SIDE_LEFT, CHANNEL_SIDE_RIGHT };
return config;
}
case 7: // 3F3R-LFE
{
static const Channel config[] = { CHANNEL_FRONT_LEFT, CHANNEL_FRONT_RIGHT, CHANNEL_FRONT_CENTER, CHANNEL_LFE, CHANNEL_BACK_CENTER, CHANNEL_SIDE_LEFT, CHANNEL_SIDE_RIGHT };
return config;
}
case 8: // 3F4-LFE
{
static const Channel config[] = { CHANNEL_FRONT_LEFT, CHANNEL_FRONT_RIGHT, CHANNEL_FRONT_CENTER, CHANNEL_LFE, CHANNEL_BACK_LEFT, CHANNEL_BACK_RIGHT, CHANNEL_SIDE_LEFT, CHANNEL_SIDE_RIGHT };
return config;
}
default:
return nullptr;
}
}
/* static */ AudioConfig::ChannelLayout
AudioConfig::ChannelLayout::SMPTEDefault(
const ChannelLayout& aChannelLayout)
{
if (!aChannelLayout.IsValid()) {
return aChannelLayout;
}
return SMPTEDefault(aChannelLayout.Map());
}
/* static */ ChannelLayout
AudioConfig::ChannelLayout::SMPTEDefault(uint32_t aMap)
{
MOZ_ASSERT(LMONO_MAP == LMONO.Map());
MOZ_ASSERT(LMONO_LFE_MAP == LMONO_LFE.Map());
MOZ_ASSERT(LSTEREO_MAP == LSTEREO.Map());
MOZ_ASSERT(LSTEREO_LFE_MAP == LSTEREO_LFE.Map());
MOZ_ASSERT(L3F_MAP == L3F.Map());
MOZ_ASSERT(L3F_LFE_MAP == L3F_LFE.Map());
MOZ_ASSERT(L2F1_MAP == L2F1.Map());
MOZ_ASSERT(L2F1_LFE_MAP == L2F1_LFE.Map());
MOZ_ASSERT(L3F1_MAP == L3F1.Map());
MOZ_ASSERT(L3F1_LFE_MAP == L3F1_LFE.Map());
MOZ_ASSERT(L2F2_MAP == L2F2.Map());
MOZ_ASSERT(L2F2_LFE_MAP == L2F2_LFE.Map());
MOZ_ASSERT(LQUAD_MAP == LQUAD.Map());
MOZ_ASSERT(L3F2_MAP == L3F2.Map());
MOZ_ASSERT(L3F2_LFE_MAP == L3F2_LFE.Map());
MOZ_ASSERT(L3F3R_LFE_MAP == L3F3R_LFE.Map());
MOZ_ASSERT(L3F4_LFE_MAP == L3F4_LFE.Map());
// First handle the most common cases.
switch (aMap) {
case LMONO_MAP: return LMONO;
case LMONO_LFE_MAP: return LMONO_LFE;
case LSTEREO_MAP: return LSTEREO;
case LSTEREO_LFE_MAP : return LSTEREO_LFE;
case L3F_MAP: return L3F;
case L3F_LFE_MAP: return L3F_LFE;
case L2F1_MAP: return L2F1;
case L2F1_LFE_MAP: return L2F1_LFE;
case L3F1_MAP: return L3F1;
case L3F1_LFE_MAP: return L3F1_LFE;
case L2F2_MAP: return L2F2;
case L2F2_LFE_MAP: return L2F2_LFE;
case LQUAD_MAP: return LQUAD;
case L3F2_MAP: return L3F2;
case L3F2_LFE_MAP: return L3F2_LFE;
case L3F3R_LFE_MAP: return L3F3R_LFE;
case L3F4_LFE_MAP: return L3F4_LFE;
default:
break;
}
AutoTArray<Channel, MAX_AUDIO_CHANNELS> layout;
uint32_t channels = 0;
uint32_t i = 0;
while (aMap) {
if (aMap & 1) {
layout.AppendElement(static_cast<Channel>(i));
channels++;
if (channels > MAX_AUDIO_CHANNELS) {
return ChannelLayout();
}
}
aMap >>= 1;
i++;
}
return ChannelLayout(channels, layout.Elements());
}
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
|
