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Separate sound playback from sound utils

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This commit is contained in:
Iliyas Jorio 2021-07-18 13:28:27 +02:00
parent 664c738817
commit ebea9d03cd
6 changed files with 352 additions and 330 deletions
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14
CMakeLists.txt
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@ -44,17 +44,25 @@ set(POMME_SOURCES
if (NOT(POMME_NO_SOUND))
list(APPEND POMME_SOURCES
${POMME_SRCDIR}/Sound/AIFF.cpp
${POMME_SRCDIR}/Sound/cmixer.cpp
${POMME_SRCDIR}/Sound/cmixer.h
${POMME_SRCDIR}/Sound/IMA4.cpp
${POMME_SRCDIR}/Sound/MACE.cpp
${POMME_SRCDIR}/Sound/SoundManager.cpp
${POMME_SRCDIR}/Sound/SoundUtilities.cpp
${POMME_SRCDIR}/Sound/xlaw.cpp
)
else()
add_compile_definitions(POMME_NO_SOUND)
endif()
if (NOT(POMME_NO_SOUND_PLAYBACK))
list(APPEND POMME_SOURCES
${POMME_SRCDIR}/Sound/cmixer.cpp
${POMME_SRCDIR}/Sound/cmixer.h
${POMME_SRCDIR}/Sound/SoundManager.cpp
)
else()
add_compile_definitions(POMME_NO_SOUND_PLAYBACK)
endif()
if (NOT(POMME_NO_GRAPHICS))
list(APPEND POMME_SOURCES
${POMME_SRCDIR}/Graphics/ARGBPixmap.cpp

4
src/Pomme.cpp
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@ -53,7 +53,7 @@ void Pomme::Init()
Pomme::Graphics::Init();
#endif
#ifndef POMME_NO_SOUND
#ifndef POMME_NO_SOUND_PLAYBACK
Pomme::Sound::Init();
#endif
@ -64,7 +64,7 @@ void Pomme::Init()
void Pomme::Shutdown()
{
#ifndef POMME_NO_SOUND
#ifndef POMME_NO_SOUND_PLAYBACK
Pomme::Sound::Shutdown();
#endif
}

21
src/PommeSound.h
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@ -16,6 +16,23 @@ namespace Pomme::Sound
void ReadAIFF(std::istream& input, cmixer::WavStream& output);
struct SampledSoundInfo
{
int16_t nChannels;
uint32_t nPackets;
int16_t codecBitDepth;
bool bigEndian;
double sampleRate;
bool isCompressed;
uint32_t compressionType;
char* dataStart;
int compressedLength;
int decompressedLength;
int8_t baseNote;
uint32_t loopStart;
uint32_t loopEnd;
};
class Codec
{
public:
@ -79,5 +96,9 @@ namespace Pomme::Sound
void Decode(const int nChannels, const std::span<const char> input, const std::span<char> output) override;
};
void GetSoundInfo(const Ptr sndhdr, SampledSoundInfo& info);
void GetSoundInfoFromSndResource(Handle sndHandle, SampledSoundInfo& info);
std::unique_ptr<Pomme::Sound::Codec> GetCodec(uint32_t fourCC);
}

326
src/Sound/SoundManager.cpp
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@ -1,6 +1,6 @@
#include "Pomme.h"
#include "PommeFiles.h"
#include "Sound/cmixer.h"
#include "cmixer.h"
#include "PommeSound.h"
#include "Utilities/bigendianstreams.h"
#include "Utilities/IEEEExtended.h"
@ -19,76 +19,6 @@ static struct ChannelImpl* headChan = nullptr;
static int nManagedChans = 0;
static double midiNoteFrequencies[128];
//-----------------------------------------------------------------------------
// Cookie-cutter sound command list.
// Used to generate 'snd ' resources.
static const uint8_t kSampledSoundCommandList[20] = {
0,1, // format
0,1, // modifier count
0,5, // modifier "sampled synth"
0,0,0,0, // init bits
0,1, // command count
0x80,soundCmd, // command soundCmd (high bit set)
0,0, // param1
0,0,0,20, // param2 (offset)
// Sample data follows
};
constexpr int kSampledSoundCommandListLength = sizeof(kSampledSoundCommandList);
//-----------------------------------------------------------------------------
// 'snd ' resource header
struct SampledSoundHeader
{
UInt32 zero;
union // the meaning of union this is decided by the encoding type
{
SInt32 stdSH_nBytes;
SInt32 cmpSH_nChannels;
SInt32 extSH_nChannels;
SInt32 nativeSH_nBytes;
};
UnsignedFixed fixedSampleRate;
UInt32 loopStart;
UInt32 loopEnd;
Byte encoding;
Byte baseFrequency; // 0-127, see Table 2-2, IM:S:2-43
};
static_assert(sizeof(SampledSoundHeader) >= 22 && sizeof(SampledSoundHeader) <= 24,
"unexpected SampledSoundHeader size");
constexpr int kSampledSoundHeaderLength = 22;
constexpr const char* kSampledSoundHeaderPackFormat = "IiIIIbb";
enum SampledSoundEncoding
{
stdSH = 0x00,
nativeSH_mono16 = 0x10, // pomme extension
nativeSH_stereo16 = 0x11, // pomme extension
cmpSH = 0xFE,
extSH = 0xFF,
};
struct SampledSoundInfo
{
int16_t nChannels;
uint32_t nPackets;
int16_t codecBitDepth;
bool bigEndian;
double sampleRate;
bool isCompressed;
uint32_t compressionType;
char* dataStart;
int compressedLength;
int decompressedLength;
int8_t baseNote;
uint32_t loopStart;
uint32_t loopEnd;
};
//-----------------------------------------------------------------------------
// Internal channel info
@ -272,123 +202,6 @@ static inline ChannelImpl& GetImpl(SndChannelPtr chan)
return *(ChannelImpl*) chan->channelImpl;
}
static void GetSoundInfo(const Ptr sndhdr, SampledSoundInfo& info)
{
// Prep the BE reader on the header.
memstream headerInput(sndhdr, kSampledSoundHeaderLength + 42);
Pomme::BigEndianIStream f(headerInput);
// Read in SampledSoundHeader and unpack it.
SampledSoundHeader header;
f.Read(reinterpret_cast<char*>(&header), kSampledSoundHeaderLength);
ByteswapStructs(kSampledSoundHeaderPackFormat, kSampledSoundHeaderLength, 1, reinterpret_cast<char*>(&header));
if (header.zero != 0)
{
// The first field can be a pointer to the sampled-sound data.
// In practice it's always gonna be 0.
TODOFATAL2("expected 0 at the beginning of an snd");
}
memset(&info, 0, sizeof(info));
info.sampleRate = static_cast<uint32_t>(header.fixedSampleRate) / 65536.0;
info.baseNote = header.baseFrequency;
info.loopStart = header.loopStart;
info.loopEnd = header.loopEnd;
switch (header.encoding)
{
case 0x00: // stdSH - standard sound header (noncompressed 8-bit mono sample data)
info.compressionType = 'raw '; // unsigned (in AIFF-C files, 'NONE' means signed!)
info.isCompressed = false;
info.bigEndian = false;
info.codecBitDepth = 8;
info.nChannels = 1;
info.nPackets = header.stdSH_nBytes;
info.dataStart = sndhdr + f.Tell();
info.compressedLength = header.stdSH_nBytes;
info.decompressedLength = info.compressedLength;
break;
case nativeSH_mono16: // pomme extension for little-endian PCM data
case nativeSH_stereo16:
info.compressionType = 'sowt';
info.isCompressed = false;
info.bigEndian = false;
info.codecBitDepth = 16;
info.nChannels = header.encoding == nativeSH_mono16 ? 1 : 2;
info.nPackets = header.nativeSH_nBytes / (2 * info.nChannels);
info.dataStart = sndhdr + f.Tell();
info.compressedLength = header.nativeSH_nBytes;
info.decompressedLength = info.compressedLength;
break;
case 0xFE: // cmpSH - compressed sound header
{
info.nPackets = f.Read<int32_t>();
f.Skip(14);
info.compressionType = f.Read<uint32_t>();
f.Skip(20);
if (info.compressionType == 0) // Assume MACE-3
{
// Assume MACE-3. It should've been set in the init options in the snd pre-header,
// but Nanosaur doesn't actually init the sound channels for MACE-3. So I guess the Mac
// assumes by default that any unspecified compression is MACE-3.
// If it wasn't MACE-3, it would've been caught by GetSoundHeaderOffset.
info.compressionType = 'MAC3';
}
std::unique_ptr<Pomme::Sound::Codec> codec = Pomme::Sound::GetCodec(info.compressionType);
info.isCompressed = true;
info.bigEndian = false;
info.nChannels = header.cmpSH_nChannels;
info.dataStart = sndhdr + f.Tell();
info.codecBitDepth = codec->AIFFBitDepth();
info.compressedLength = info.nChannels * info.nPackets * codec->BytesPerPacket();
info.decompressedLength = info.nChannels * info.nPackets * codec->SamplesPerPacket() * 2;
break;
}
case 0xFF: // extSH - extended sound header (noncompressed 8/16-bit mono or stereo)
{
info.nPackets = f.Read<int32_t>();
f.Skip(22);
info.codecBitDepth = f.Read<int16_t>();
f.Skip(14);
info.isCompressed = false;
info.bigEndian = true;
info.compressionType = 'twos'; // TODO: if 16-bit, should we use 'raw ' or 'NONE'/'twos'?
info.nChannels = header.extSH_nChannels;
info.dataStart = sndhdr + f.Tell();
info.compressedLength = header.extSH_nChannels * info.nPackets * info.codecBitDepth / 8;
info.decompressedLength = info.compressedLength;
if (info.codecBitDepth == 8)
TODO2("should an 8-bit extSH be 'twos' or 'raw '?");
break;
}
default:
TODOFATAL2("unsupported snd header encoding " << (int)header.encoding);
}
}
static void GetSoundInfoFromSndResource(Handle sndHandle, SampledSoundInfo& info)
{
long offsetToHeader;
GetSoundHeaderOffset((SndListHandle) sndHandle, &offsetToHeader);
Ptr sndhdr = (Ptr) (*sndHandle) + offsetToHeader;
GetSoundInfo(sndhdr, info);
}
//-----------------------------------------------------------------------------
// MIDI note utilities
@ -524,7 +337,7 @@ static void InstallSoundInChannel(SndChannelPtr chan, const Ptr sampledSoundHead
//---------------------------------
// Distill sound info
SampledSoundInfo info;
Pomme::Sound::SampledSoundInfo info;
GetSoundInfo(sampledSoundHeader, info);
//---------------------------------
@ -666,66 +479,6 @@ OSErr SndDoCommand(SndChannelPtr chan, const SndCommand* cmd, Boolean noWait)
return noErr;
}
template<typename T>
static void Expect(const T a, const T b, const char* msg)
{
if (a != b)
throw std::runtime_error(msg);
}
// IM:S:2-58 "MyGetSoundHeaderOffset"
OSErr GetSoundHeaderOffset(SndListHandle sndHandle, long* offset)
{
memstream sndStream((Ptr) *sndHandle, GetHandleSize((Handle) sndHandle));
Pomme::BigEndianIStream f(sndStream);
// Read header
SInt16 format = f.Read<SInt16>();
switch (format)
{
case 1: // Standard 'snd ' resource
{
Expect<SInt16>(1, f.Read<SInt16>(), "'snd ' modifier count");
Expect<SInt16>(5, f.Read<SInt16>(), "'snd ' sampledSynth");
UInt32 initBits = f.Read<UInt32>();
if (initBits & initMACE6)
TODOFATAL2("MACE-6 not supported yet");
break;
}
case 2: // HyperCard sampled-sound format
f.Skip(2); // Skip reference count (for application use)
break;
default:
return badFormat;
}
// Now read sound commands
SInt16 nCmds = f.Read<SInt16>();
//LOG << nCmds << " commands\n";
for (; nCmds >= 1; nCmds--)
{
UInt16 cmd = f.Read<UInt16>();
f.Skip(2); // SInt16 param1
SInt32 param2 = f.Read<SInt32>();
cmd &= 0x7FFF; // See IM:S:2-75
// When a sound command contained in an 'snd ' resource has associated sound data,
// the high bit of the command is set. This changes the meaning of the param2 field of the
// command from a pointer to a location in RAM to an offset value that specifies the offset
// in bytes from the resource's beginning to the location of the associated sound data (such
// as a sampled sound header).
if (cmd == bufferCmd || cmd == soundCmd)
{
*offset = param2;
return noErr;
}
}
LOG << "didn't find offset in snd resource\n";
return badFormat;
}
OSErr SndStartFilePlay(
SndChannelPtr chan,
short fRefNum,
@ -811,63 +564,6 @@ NumVersion SndSoundManagerVersion()
return v;
}
//-----------------------------------------------------------------------------
// Extension: decompress
Boolean Pomme_DecompressSoundResource(SndListHandle* sndHandlePtr, long* offsetToHeader)
{
SampledSoundInfo info;
GetSoundInfoFromSndResource((Handle) *sndHandlePtr, info);
// We only handle cmpSH (compressed) 'snd ' resources.
if (!info.isCompressed)
{
return false;
}
int outInitialSize = kSampledSoundCommandListLength + kSampledSoundHeaderLength;
std::unique_ptr<Pomme::Sound::Codec> codec = Pomme::Sound::GetCodec(info.compressionType);
// Decompress
SndListHandle outHandle = (SndListHandle) NewHandle(outInitialSize + info.decompressedLength);
auto spanIn = std::span(info.dataStart, info.compressedLength);
auto spanOut = std::span((char*) *outHandle + outInitialSize, info.decompressedLength);
codec->Decode(info.nChannels, spanIn, spanOut);
// ------------------------------------------------------
// Now we have the PCM data.
// Put the output 'snd ' resource together.
SampledSoundHeader shOut = {};
shOut.zero = 0;
shOut.nativeSH_nBytes = info.decompressedLength;
shOut.fixedSampleRate = static_cast<UnsignedFixed>(info.sampleRate * 65536.0);
shOut.loopStart = info.loopStart;
shOut.loopEnd = info.loopEnd;
shOut.encoding = info.nChannels == 2 ? nativeSH_stereo16 : nativeSH_mono16;
shOut.baseFrequency = info.baseNote;
ByteswapStructs(kSampledSoundHeaderPackFormat, kSampledSoundHeaderLength, 1, reinterpret_cast<char*>(&shOut));
memcpy(*outHandle, kSampledSoundCommandList, kSampledSoundCommandListLength);
memcpy((char*) *outHandle + kSampledSoundCommandListLength, &shOut, kSampledSoundHeaderLength);
// Nuke compressed sound handle, replace it with the decopmressed one we've just created
DisposeHandle((Handle) *sndHandlePtr);
*sndHandlePtr = outHandle;
*offsetToHeader = kSampledSoundCommandListLength;
long offsetCheck = 0;
OSErr err = GetSoundHeaderOffset(outHandle, &offsetCheck);
if (err != noErr || offsetCheck != kSampledSoundCommandListLength)
{
throw std::runtime_error("Incorrect decompressed sound header offset");
}
return true;
}
//-----------------------------------------------------------------------------
// Extension: pause/unpause channels that are currently playing
@ -906,21 +602,3 @@ void Pomme::Sound::Shutdown()
SndDisposeChannel(headChan->macChannel, true);
}
}
std::unique_ptr<Pomme::Sound::Codec> Pomme::Sound::GetCodec(uint32_t fourCC)
{
switch (fourCC)
{
case 0: // Assume MACE-3 by default.
case 'MAC3':
return std::make_unique<Pomme::Sound::MACE>();
case 'ima4':
return std::make_unique<Pomme::Sound::IMA4>();
case 'alaw':
case 'ulaw':
return std::make_unique<Pomme::Sound::xlaw>(fourCC);
default:
throw std::runtime_error("Unknown audio codec: " + Pomme::FourCCString(fourCC));
}
}

315
src/Sound/SoundUtilities.cpp Normal file
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@ -0,0 +1,315 @@
#include "Pomme.h"
#include "PommeFiles.h"
#include "PommeSound.h"
#include "Utilities/memstream.h"
#include "Utilities/bigendianstreams.h"
#include <cstring>
using namespace Pomme::Sound;
//-----------------------------------------------------------------------------
// Cookie-cutter sound command list.
// Used to generate 'snd ' resources.
static const uint8_t kSampledSoundCommandList[20] =
{
0,1, // format
0,1, // modifier count
0,5, // modifier "sampled synth"
0,0,0,0, // init bits
0,1, // command count
0x80,soundCmd, // command soundCmd (high bit set)
0,0, // param1
0,0,0,20, // param2 (offset)
// Sample data follows
};
constexpr int kSampledSoundCommandListLength = sizeof(kSampledSoundCommandList);
//-----------------------------------------------------------------------------
// 'snd ' resource header
struct SampledSoundHeader
{
UInt32 zero;
union // the meaning of union this is decided by the encoding type
{
SInt32 stdSH_nBytes;
SInt32 cmpSH_nChannels;
SInt32 extSH_nChannels;
SInt32 nativeSH_nBytes;
};
UnsignedFixed fixedSampleRate;
UInt32 loopStart;
UInt32 loopEnd;
Byte encoding;
Byte baseFrequency; // 0-127, see Table 2-2, IM:S:2-43
};
static_assert(sizeof(SampledSoundHeader) >= 22 && sizeof(SampledSoundHeader) <= 24,
"unexpected SampledSoundHeader size");
constexpr int kSampledSoundHeaderLength = 22;
constexpr const char* kSampledSoundHeaderPackFormat = "IiIIIbb";
enum SampledSoundEncoding
{
stdSH = 0x00,
nativeSH_mono16 = 0x10, // pomme extension
nativeSH_stereo16 = 0x11, // pomme extension
cmpSH = 0xFE,
extSH = 0xFF,
};
// IM:S:2-58 "MyGetSoundHeaderOffset"
OSErr GetSoundHeaderOffset(SndListHandle sndHandle, long* offset)
{
memstream sndStream((Ptr) *sndHandle, GetHandleSize((Handle) sndHandle));
Pomme::BigEndianIStream f(sndStream);
// Read header
SInt16 format = f.Read<SInt16>();
switch (format)
{
case 1: // Standard 'snd ' resource
{
SInt16 modifierCount = f.Read<SInt16>();
SInt16 synthType = f.Read<SInt16>();
UInt32 initBits = f.Read<UInt32>();
if (1 != modifierCount)
TODOFATAL2("only 1 modifier per 'snd ' is supported");
if (5 != synthType)
TODOFATAL2("only sampledSynth 'snd ' is supported");
if (initBits & initMACE6)
TODOFATAL2("MACE-6 not supported yet");
break;
}
case 2: // HyperCard sampled-sound format
f.Skip(2); // Skip reference count (for application use)
break;
default:
return badFormat;
}
// Now read sound commands
SInt16 nCmds = f.Read<SInt16>();
//LOG << nCmds << " commands\n";
for (; nCmds >= 1; nCmds--)
{
UInt16 cmd = f.Read<UInt16>();
f.Skip(2); // SInt16 param1
SInt32 param2 = f.Read<SInt32>();
cmd &= 0x7FFF; // See IM:S:2-75
// When a sound command contained in an 'snd ' resource has associated sound data,
// the high bit of the command is set. This changes the meaning of the param2 field of the
// command from a pointer to a location in RAM to an offset value that specifies the offset
// in bytes from the resource's beginning to the location of the associated sound data (such
// as a sampled sound header).
if (cmd == bufferCmd || cmd == soundCmd)
{
*offset = param2;
return noErr;
}
}
TODOMINOR2("didn't find offset in snd resource");
return badFormat;
}
void Pomme::Sound::GetSoundInfo(const Ptr sndhdr, SampledSoundInfo& info)
{
// Prep the BE reader on the header.
memstream headerInput(sndhdr, kSampledSoundHeaderLength + 42);
Pomme::BigEndianIStream f(headerInput);
// Read in SampledSoundHeader and unpack it.
SampledSoundHeader header;
f.Read(reinterpret_cast<char*>(&header), kSampledSoundHeaderLength);
ByteswapStructs(kSampledSoundHeaderPackFormat, kSampledSoundHeaderLength, 1, reinterpret_cast<char*>(&header));
if (header.zero != 0)
{
// The first field can be a pointer to the sampled-sound data.
// In practice it's always gonna be 0.
TODOFATAL2("expected 0 at the beginning of an snd");
}
memset(&info, 0, sizeof(info));
info.sampleRate = static_cast<uint32_t>(header.fixedSampleRate) / 65536.0;
info.baseNote = header.baseFrequency;
info.loopStart = header.loopStart;
info.loopEnd = header.loopEnd;
switch (header.encoding)
{
case 0x00: // stdSH - standard sound header (noncompressed 8-bit mono sample data)
info.compressionType = 'raw '; // unsigned (in AIFF-C files, 'NONE' means signed!)
info.isCompressed = false;
info.bigEndian = false;
info.codecBitDepth = 8;
info.nChannels = 1;
info.nPackets = header.stdSH_nBytes;
info.dataStart = sndhdr + f.Tell();
info.compressedLength = header.stdSH_nBytes;
info.decompressedLength = info.compressedLength;
break;
case nativeSH_mono16: // pomme extension for little-endian PCM data
case nativeSH_stereo16:
info.compressionType = 'sowt';
info.isCompressed = false;
info.bigEndian = false;
info.codecBitDepth = 16;
info.nChannels = header.encoding == nativeSH_mono16 ? 1 : 2;
info.nPackets = header.nativeSH_nBytes / (2 * info.nChannels);
info.dataStart = sndhdr + f.Tell();
info.compressedLength = header.nativeSH_nBytes;
info.decompressedLength = info.compressedLength;
break;
case 0xFE: // cmpSH - compressed sound header
{
info.nPackets = f.Read<int32_t>();
f.Skip(14);
info.compressionType = f.Read<uint32_t>();
f.Skip(20);
if (info.compressionType == 0) // Assume MACE-3
{
// Assume MACE-3. It should've been set in the init options in the snd pre-header,
// but Nanosaur doesn't actually init the sound channels for MACE-3. So I guess the Mac
// assumes by default that any unspecified compression is MACE-3.
// If it wasn't MACE-3, it would've been caught by GetSoundHeaderOffset.
info.compressionType = 'MAC3';
}
std::unique_ptr<Pomme::Sound::Codec> codec = Pomme::Sound::GetCodec(info.compressionType);
info.isCompressed = true;
info.bigEndian = false;
info.nChannels = header.cmpSH_nChannels;
info.dataStart = sndhdr + f.Tell();
info.codecBitDepth = codec->AIFFBitDepth();
info.compressedLength = info.nChannels * info.nPackets * codec->BytesPerPacket();
info.decompressedLength = info.nChannels * info.nPackets * codec->SamplesPerPacket() * 2;
break;
}
case 0xFF: // extSH - extended sound header (noncompressed 8/16-bit mono or stereo)
{
info.nPackets = f.Read<int32_t>();
f.Skip(22);
info.codecBitDepth = f.Read<int16_t>();
f.Skip(14);
info.isCompressed = false;
info.bigEndian = true;
info.compressionType = 'twos'; // TODO: if 16-bit, should we use 'raw ' or 'NONE'/'twos'?
info.nChannels = header.extSH_nChannels;
info.dataStart = sndhdr + f.Tell();
info.compressedLength = header.extSH_nChannels * info.nPackets * info.codecBitDepth / 8;
info.decompressedLength = info.compressedLength;
if (info.codecBitDepth == 8)
TODO2("should an 8-bit extSH be 'twos' or 'raw '?");
break;
}
default:
TODOFATAL2("unsupported snd header encoding " << (int)header.encoding);
}
}
void Pomme::Sound::GetSoundInfoFromSndResource(Handle sndHandle, SampledSoundInfo& info)
{
long offsetToHeader;
GetSoundHeaderOffset((SndListHandle) sndHandle, &offsetToHeader);
Ptr sndhdr = (Ptr) (*sndHandle) + offsetToHeader;
GetSoundInfo(sndhdr, info);
}
//-----------------------------------------------------------------------------
// Extension: decompress
Boolean Pomme_DecompressSoundResource(SndListHandle* sndHandlePtr, long* offsetToHeader)
{
SampledSoundInfo info;
GetSoundInfoFromSndResource((Handle) *sndHandlePtr, info);
// We only handle cmpSH (compressed) 'snd ' resources.
if (!info.isCompressed)
{
return false;
}
int outInitialSize = kSampledSoundCommandListLength + kSampledSoundHeaderLength;
std::unique_ptr<Pomme::Sound::Codec> codec = Pomme::Sound::GetCodec(info.compressionType);
// Decompress
SndListHandle outHandle = (SndListHandle) NewHandle(outInitialSize + info.decompressedLength);
auto spanIn = std::span(info.dataStart, info.compressedLength);
auto spanOut = std::span((char*) *outHandle + outInitialSize, info.decompressedLength);
codec->Decode(info.nChannels, spanIn, spanOut);
// ------------------------------------------------------
// Now we have the PCM data.
// Put the output 'snd ' resource together.
SampledSoundHeader shOut = {};
shOut.zero = 0;
shOut.nativeSH_nBytes = info.decompressedLength;
shOut.fixedSampleRate = static_cast<UnsignedFixed>(info.sampleRate * 65536.0);
shOut.loopStart = info.loopStart;
shOut.loopEnd = info.loopEnd;
shOut.encoding = info.nChannels == 2 ? nativeSH_stereo16 : nativeSH_mono16;
shOut.baseFrequency = info.baseNote;
ByteswapStructs(kSampledSoundHeaderPackFormat, kSampledSoundHeaderLength, 1, reinterpret_cast<char*>(&shOut));
memcpy(*outHandle, kSampledSoundCommandList, kSampledSoundCommandListLength);
memcpy((char*) *outHandle + kSampledSoundCommandListLength, &shOut, kSampledSoundHeaderLength);
// Nuke compressed sound handle, replace it with the decopmressed one we've just created
DisposeHandle((Handle) *sndHandlePtr);
*sndHandlePtr = outHandle;
*offsetToHeader = kSampledSoundCommandListLength;
long offsetCheck = 0;
OSErr err = GetSoundHeaderOffset(outHandle, &offsetCheck);
if (err != noErr || offsetCheck != kSampledSoundCommandListLength)
{
throw std::runtime_error("Incorrect decompressed sound header offset");
}
return true;
}
//-----------------------------------------------------------------------------
std::unique_ptr<Pomme::Sound::Codec> Pomme::Sound::GetCodec(uint32_t fourCC)
{
switch (fourCC)
{
case 0: // Assume MACE-3 by default.
case 'MAC3':
return std::make_unique<Pomme::Sound::MACE>();
case 'ima4':
return std::make_unique<Pomme::Sound::IMA4>();
case 'alaw':
case 'ulaw':
return std::make_unique<Pomme::Sound::xlaw>(fourCC);
default:
throw std::runtime_error("Unknown audio codec: " + Pomme::FourCCString(fourCC));
}
}

2
src/Sound/cmixer.cpp
View File

@ -22,7 +22,7 @@
** IN THE SOFTWARE.
**/
#include "Sound/cmixer.h"
#include "cmixer.h"
#include "Utilities/structpack.h"
#include <SDL.h>