mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-24 02:36:27 +00:00
321 lines
7.7 KiB
C++
321 lines
7.7 KiB
C++
/* ScummVM - Scumm Interpreter
|
|
* Copyright (C) 2001-2003 The ScummVM project
|
|
*
|
|
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*
|
|
* $Header$
|
|
*
|
|
*/
|
|
|
|
#include "stdafx.h"
|
|
#include "audiostream.h"
|
|
#include "mixer.h"
|
|
#include "common/engine.h"
|
|
#include "common/util.h"
|
|
|
|
|
|
template<bool is16Bit, bool isUnsigned>
|
|
static inline int16 readSample(const byte *ptr) {
|
|
if (is16Bit) {
|
|
if (isUnsigned)
|
|
return (int16)(READ_BE_UINT16(ptr) ^ 0x8000);
|
|
else
|
|
return (int16)READ_BE_UINT16(ptr);
|
|
} else {
|
|
if (isUnsigned)
|
|
return (int8)(*ptr ^ 0x80) << 8;
|
|
else
|
|
return (int8)*ptr << 8;
|
|
}
|
|
}
|
|
|
|
#ifndef _MSC_VER
|
|
#pragma mark -
|
|
#pragma mark --- LinearMemoryStream ---
|
|
#pragma mark -
|
|
#endif
|
|
|
|
|
|
template<bool stereo, bool is16Bit, bool isUnsigned>
|
|
class LinearMemoryStream : public AudioInputStream {
|
|
protected:
|
|
const byte *_ptr;
|
|
const byte *_end;
|
|
|
|
public:
|
|
LinearMemoryStream(const byte *ptr, uint len)
|
|
: _ptr(ptr), _end(ptr+len) {
|
|
if (stereo) // Stereo requires even sized data
|
|
assert(len % 2 == 0);
|
|
}
|
|
int16 read() {
|
|
assert(_ptr < _end);
|
|
int16 val = readSample<is16Bit, isUnsigned>(_ptr);
|
|
_ptr += (is16Bit ? 2 : 1);
|
|
return val;
|
|
}
|
|
int size() const {
|
|
return (_end - _ptr) / (is16Bit ? 2 : 1);
|
|
}
|
|
bool isStereo() const {
|
|
return stereo;
|
|
}
|
|
};
|
|
|
|
|
|
#ifndef _MSC_VER
|
|
#pragma mark -
|
|
#pragma mark --- WrappedMemoryStream ---
|
|
#pragma mark -
|
|
#endif
|
|
|
|
|
|
// Wrapped memory stream, to be used by the ChannelStream class (and possibly others?)
|
|
template<bool stereo, bool is16Bit, bool isUnsigned>
|
|
class WrappedMemoryStream : public WrappedAudioInputStream {
|
|
protected:
|
|
byte *_bufferStart;
|
|
byte *_bufferEnd;
|
|
byte *_pos;
|
|
byte *_end;
|
|
|
|
public:
|
|
WrappedMemoryStream(uint bufferSize);
|
|
~WrappedMemoryStream() { free(_bufferStart); }
|
|
int16 read();
|
|
int size() const;
|
|
bool isStereo() const {
|
|
return stereo;
|
|
}
|
|
|
|
void append(const byte *data, uint32 len);
|
|
};
|
|
|
|
|
|
template<bool stereo, bool is16Bit, bool isUnsigned>
|
|
WrappedMemoryStream<stereo, is16Bit, isUnsigned>::WrappedMemoryStream(uint bufferSize) {
|
|
if (stereo) // Stereo requires an even sized buffer
|
|
assert(bufferSize % 2 == 0);
|
|
_bufferStart = (byte *)malloc(bufferSize);
|
|
_pos = _end = _bufferStart;
|
|
_bufferEnd = _bufferStart + bufferSize;
|
|
}
|
|
|
|
template<bool stereo, bool is16Bit, bool isUnsigned>
|
|
int16 WrappedMemoryStream<stereo, is16Bit, isUnsigned>::read() {
|
|
assert(_pos != _end);
|
|
int16 val = readSample<is16Bit, isUnsigned>(_pos);
|
|
_pos += (is16Bit ? 2 : 1);
|
|
|
|
// Wrap around?
|
|
if (_pos >= _bufferEnd)
|
|
_pos = _pos - (_bufferEnd - _bufferStart);
|
|
|
|
return val;
|
|
}
|
|
|
|
template<bool stereo, bool is16Bit, bool isUnsigned>
|
|
int WrappedMemoryStream<stereo, is16Bit, isUnsigned>::size() const {
|
|
int len = _end - _pos;
|
|
if (len < 0)
|
|
len += (_bufferEnd - _bufferStart);
|
|
return len / (is16Bit ? 2 : 1);
|
|
}
|
|
|
|
template<bool stereo, bool is16Bit, bool isUnsigned>
|
|
void WrappedMemoryStream<stereo, is16Bit, isUnsigned>::append(const byte *data, uint32 len) {
|
|
if (_end + len > _bufferEnd) {
|
|
// Wrap-around case
|
|
uint32 size_to_end_of_buffer = _bufferEnd - _end;
|
|
len -= size_to_end_of_buffer;
|
|
if ((_end < _pos) || (_bufferStart + len >= _pos)) {
|
|
debug(2, "WrappedMemoryStream: buffer overflow (A)");
|
|
return;
|
|
}
|
|
memcpy(_end, data, size_to_end_of_buffer);
|
|
memcpy(_bufferStart, data + size_to_end_of_buffer, len);
|
|
_end = _bufferStart + len;
|
|
} else {
|
|
if ((_end < _pos) && (_end + len >= _pos)) {
|
|
debug(2, "WrappedMemoryStream: buffer overflow (B)");
|
|
return;
|
|
}
|
|
memcpy(_end, data, len);
|
|
_end += len;
|
|
}
|
|
}
|
|
|
|
|
|
#ifndef _MSC_VER
|
|
#pragma mark -
|
|
#pragma mark --- MP3 (MAD) stream ---
|
|
#pragma mark -
|
|
#endif
|
|
|
|
|
|
#ifdef USE_MAD
|
|
class MP3InputStream : public AudioInputStream {
|
|
struct mad_stream _stream;
|
|
struct mad_frame _frame;
|
|
struct mad_synth _synth;
|
|
uint32 _posInFrame;
|
|
public:
|
|
// TODO
|
|
MP3InputStream();
|
|
};
|
|
|
|
MP3InputStream::MP3InputStream() {
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifndef _MSC_VER
|
|
#pragma mark -
|
|
#pragma mark --- Ogg Vorbis stream ---
|
|
#pragma mark -
|
|
#endif
|
|
|
|
|
|
#ifdef USE_VORBIS
|
|
|
|
#ifdef CHUNKSIZE
|
|
#define VORBIS_TREMOR
|
|
#endif
|
|
|
|
|
|
VorbisInputStream::VorbisInputStream(OggVorbis_File *file, int duration)
|
|
: _ov_file(file) {
|
|
_pos = _buffer + ARRAYSIZE(_buffer);
|
|
_channels = ov_info(_ov_file, -1)->channels;
|
|
|
|
if (duration)
|
|
_end_pos = ov_pcm_tell(_ov_file) + duration;
|
|
else
|
|
_end_pos = ov_pcm_total(_ov_file, -1);
|
|
|
|
_eof_flag = false;
|
|
}
|
|
|
|
int16 VorbisInputStream::read() {
|
|
if (_pos >= _buffer + ARRAYSIZE(_buffer)) {
|
|
refill();
|
|
}
|
|
return *_pos++;
|
|
}
|
|
|
|
int VorbisInputStream::size() const {
|
|
if (_eof_flag)
|
|
return 0;
|
|
return (_end_pos - ov_pcm_tell(_ov_file)) + (_buffer + ARRAYSIZE(_buffer) - _pos);
|
|
}
|
|
|
|
void VorbisInputStream::refill() {
|
|
// Read the samples
|
|
uint len_left = sizeof(_buffer);
|
|
char *read_pos = (char *)_buffer;
|
|
|
|
while (len_left > 0) {
|
|
long result = ov_read(_ov_file, read_pos, len_left,
|
|
#ifndef VORBIS_TREMOR
|
|
#ifdef SCUMM_BIG_ENDIAN
|
|
1,
|
|
#else
|
|
0,
|
|
#endif
|
|
2, // 16 bit
|
|
1, // signed
|
|
#endif
|
|
NULL);
|
|
if (result == 0) {
|
|
_eof_flag = true;
|
|
memset(read_pos, 0, len_left);
|
|
break;
|
|
} else if (result == OV_HOLE) {
|
|
// Possibly recoverable, just warn about it
|
|
warning("Corrupted data in Vorbis file");
|
|
} else if (result < 0) {
|
|
debug(1, "Decode error %d in Vorbis file", result);
|
|
// Don't delete it yet, that causes problems in
|
|
// the CD player emulation code.
|
|
_eof_flag = true;
|
|
memset(read_pos, 0, len_left);
|
|
break;
|
|
} else {
|
|
len_left -= result;
|
|
read_pos += result;
|
|
}
|
|
}
|
|
|
|
_pos = _buffer;
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
#ifndef _MSC_VER
|
|
#pragma mark -
|
|
#pragma mark --- Input stream factories ---
|
|
#pragma mark -
|
|
#endif
|
|
|
|
|
|
template<bool stereo>
|
|
static AudioInputStream *makeLinearInputStream(const byte *ptr, uint32 len, bool isUnsigned, bool is16Bit) {
|
|
if (isUnsigned) {
|
|
if (is16Bit)
|
|
return new LinearMemoryStream<stereo, true, true>(ptr, len);
|
|
else
|
|
return new LinearMemoryStream<stereo, false, true>(ptr, len);
|
|
} else {
|
|
if (is16Bit)
|
|
return new LinearMemoryStream<stereo, true, false>(ptr, len);
|
|
else
|
|
return new LinearMemoryStream<stereo, false, false>(ptr, len);
|
|
}
|
|
}
|
|
|
|
|
|
template<bool stereo>
|
|
static WrappedAudioInputStream *makeWrappedInputStream(uint32 len, bool isUnsigned, bool is16Bit) {
|
|
if (isUnsigned) {
|
|
if (is16Bit)
|
|
return new WrappedMemoryStream<stereo, true, true>(len);
|
|
else
|
|
return new WrappedMemoryStream<stereo, false, true>(len);
|
|
} else {
|
|
if (is16Bit)
|
|
return new WrappedMemoryStream<stereo, true, false>(len);
|
|
else
|
|
return new WrappedMemoryStream<stereo, false, false>(len);
|
|
}
|
|
}
|
|
|
|
|
|
AudioInputStream *makeLinearInputStream(byte _flags, const byte *ptr, uint32 len) {
|
|
if (_flags & SoundMixer::FLAG_STEREO) {
|
|
return makeLinearInputStream<true>(ptr, len, _flags & SoundMixer::FLAG_UNSIGNED, _flags & SoundMixer::FLAG_16BITS != 0);
|
|
} else {
|
|
return makeLinearInputStream<false>(ptr, len, _flags & SoundMixer::FLAG_UNSIGNED, _flags & SoundMixer::FLAG_16BITS != 0);
|
|
}
|
|
}
|
|
|
|
WrappedAudioInputStream *makeWrappedInputStream(byte _flags, uint32 len) {
|
|
if (_flags & SoundMixer::FLAG_STEREO) {
|
|
return makeWrappedInputStream<true>(len, _flags & SoundMixer::FLAG_UNSIGNED, _flags & SoundMixer::FLAG_16BITS != 0);
|
|
} else {
|
|
return makeWrappedInputStream<false>(len, _flags & SoundMixer::FLAG_UNSIGNED, _flags & SoundMixer::FLAG_16BITS != 0);
|
|
}
|
|
}
|