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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#include "sci/resource.h"
#include "sci/sfx/audio.h"
#include "common/system.h"
#include "sound/audiostream.h"
#include "sound/mixer.h"
namespace Sci {
int AudioPlayer::startAudio(uint16 module, uint32 number) {
int sampleLen;
Audio::AudioStream *audioStream = getAudioStream(number, module, &sampleLen);
if (audioStream) {
g_system->getMixer()->playInputStream(Audio::Mixer::kSpeechSoundType, &_audioHandle, audioStream);
return sampleLen;
}
return 0;
}
int AudioPlayer::getAudioPosition() {
if (g_system->getMixer()->isSoundHandleActive(_audioHandle))
return g_system->getMixer()->getSoundElapsedTime(_audioHandle) * 6 / 100; // return elapsed time in ticks
else
return -1; // Sound finished
}
enum SolFlags {
kSolFlagCompressed = 1 << 0,
kSolFlagUnknown = 1 << 1,
kSolFlag16Bit = 1 << 2,
kSolFlagIsSigned = 1 << 3
};
// FIXME: Move this to sound/adpcm.cpp?
// Note that the 16-bit version is also used in coktelvideo.cpp
static const uint16 tableDPCM16[128] = {
0x0000, 0x0008, 0x0010, 0x0020, 0x0030, 0x0040, 0x0050, 0x0060, 0x0070, 0x0080,
0x0090, 0x00A0, 0x00B0, 0x00C0, 0x00D0, 0x00E0, 0x00F0, 0x0100, 0x0110, 0x0120,
0x0130, 0x0140, 0x0150, 0x0160, 0x0170, 0x0180, 0x0190, 0x01A0, 0x01B0, 0x01C0,
0x01D0, 0x01E0, 0x01F0, 0x0200, 0x0208, 0x0210, 0x0218, 0x0220, 0x0228, 0x0230,
0x0238, 0x0240, 0x0248, 0x0250, 0x0258, 0x0260, 0x0268, 0x0270, 0x0278, 0x0280,
0x0288, 0x0290, 0x0298, 0x02A0, 0x02A8, 0x02B0, 0x02B8, 0x02C0, 0x02C8, 0x02D0,
0x02D8, 0x02E0, 0x02E8, 0x02F0, 0x02F8, 0x0300, 0x0308, 0x0310, 0x0318, 0x0320,
0x0328, 0x0330, 0x0338, 0x0340, 0x0348, 0x0350, 0x0358, 0x0360, 0x0368, 0x0370,
0x0378, 0x0380, 0x0388, 0x0390, 0x0398, 0x03A0, 0x03A8, 0x03B0, 0x03B8, 0x03C0,
0x03C8, 0x03D0, 0x03D8, 0x03E0, 0x03E8, 0x03F0, 0x03F8, 0x0400, 0x0440, 0x0480,
0x04C0, 0x0500, 0x0540, 0x0580, 0x05C0, 0x0600, 0x0640, 0x0680, 0x06C0, 0x0700,
0x0740, 0x0780, 0x07C0, 0x0800, 0x0900, 0x0A00, 0x0B00, 0x0C00, 0x0D00, 0x0E00,
0x0F00, 0x1000, 0x1400, 0x1800, 0x1C00, 0x2000, 0x3000, 0x4000
};
static const byte tableDPCM8[8] = {0, 1, 2, 3, 6, 10, 15, 21};
static void deDPCM16(byte *soundBuf, Common::SeekableReadStream &audioStream, uint32 n) {
int16 *out = (int16 *) soundBuf;
int32 s = 0;
for (uint32 i = 0; i < n; i++) {
byte b = audioStream.readByte();
if (b & 0x80)
s -= tableDPCM16[b & 0x7f];
else
s += tableDPCM16[b];
s = CLIP<int32>(s, -32768, 32767);
*out++ = s;
}
}
static void deDPCM8Nibble(byte *soundBuf, int32 &s, byte b) {
if (b & 8)
s -= tableDPCM8[7 - (b & 7)];
else
s += tableDPCM8[b & 7];
s = CLIP<int32>(s, 0, 255);
*soundBuf = TO_LE_16(s);
}
static void deDPCM8(byte *soundBuf, Common::SeekableReadStream &audioStream, uint32 n) {
int32 s = 0x80;
for (uint i = 0; i < n; i++) {
byte b = audioStream.readByte();
deDPCM8Nibble(soundBuf++, s, b >> 4);
deDPCM8Nibble(soundBuf++, s, b & 0xf);
}
}
// Sierra SOL audio file reader
// Check here for more info: http://wiki.multimedia.cx/index.php?title=Sierra_Audio
static bool readSOLHeader(Common::SeekableReadStream *audioStream, int headerSize, uint32 &size, uint16 &audioRate, byte &audioFlags) {
if (headerSize != 11 && headerSize != 12) {
warning("SOL audio header of size %i not supported", headerSize);
return false;
}
audioStream->readUint32LE(); // skip "SOL" + 0 (4 bytes)
audioRate = audioStream->readUint16LE();
audioFlags = audioStream->readByte();
size = audioStream->readUint32LE();
return true;
}
static byte* readSOLAudio(Common::SeekableReadStream *audioStream, uint32 &size, byte audioFlags, byte &flags) {
byte *buffer;
// Convert the SOL stream flags to our own format
flags = 0;
if (audioFlags & kSolFlag16Bit)
flags |= Audio::Mixer::FLAG_16BITS | Audio::Mixer::FLAG_LITTLE_ENDIAN;
if (!(audioFlags & kSolFlagIsSigned))
flags |= Audio::Mixer::FLAG_UNSIGNED;
if (audioFlags & kSolFlagCompressed) {
buffer = (byte *)malloc(size * 2);
if (audioFlags & kSolFlag16Bit)
deDPCM16(buffer, *audioStream, size);
else
deDPCM8(buffer, *audioStream, size);
size *= 2;
} else {
// We assume that the sound data is raw PCM
buffer = (byte *)malloc(size);
audioStream->read(buffer, size);
}
return buffer;
}
Audio::AudioStream* AudioPlayer::getAudioStream(uint32 number, uint32 volume, int *sampleLen) {
Audio::AudioStream *audioStream = 0;
uint32 size = 0;
byte *data = 0;
byte flags = 0;
Sci::Resource* audioRes;
if (volume == 65535) {
audioRes = _resMan->findResource(ResourceId(kResourceTypeAudio, number), false);
if (!audioRes) {
warning("Failed to find audio entry %i", number);
return NULL;
}
} else {
audioRes = _resMan->findResource(ResourceId(kResourceTypeAudio36, volume, number), false);
if (!audioRes) {
warning("Failed to find audio entry (%i, %i, %i, %i, %i)", volume, (number >> 24) & 0xff,
(number >> 16) & 0xff, (number >> 8) & 0xff, number & 0xff);
return NULL;
}
}
byte audioFlags;
if (audioRes->headerSize > 0) {
// SCI1.1
Common::MemoryReadStream headerStream(audioRes->header, audioRes->headerSize, Common::DisposeAfterUse::NO);
if (readSOLHeader(&headerStream, audioRes->headerSize, size, _audioRate, audioFlags)) {
Common::MemoryReadStream dataStream(audioRes->data, audioRes->size, Common::DisposeAfterUse::NO);
data = readSOLAudio(&dataStream, size, audioFlags, flags);
}
} else {
// SCI1
size = audioRes->size;
data = (byte *)malloc(size);
assert(data);
memcpy(data, audioRes->data, size);
flags = Audio::Mixer::FLAG_UNSIGNED;
}
if (data) {
audioStream = Audio::makeLinearInputStream(data, size, _audioRate,
flags | Audio::Mixer::FLAG_AUTOFREE, 0, 0);
if (audioStream) {
*sampleLen = (flags & Audio::Mixer::FLAG_16BITS ? size >> 1 : size) * 60 / _audioRate;
return audioStream;
}
}
return NULL;
}
} // End of namespace Sci
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