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/* -*- mode: c; tab-width: 4; c-basic-offset: 4; c-file-style: "linux" -*- */
//
// Copyright (c) 2009-2011, Wei Mingzhi <whistler_wmz@users.sf.net>.
// Copyright (c) 2011-2022, SDLPAL development team.
// All rights reserved.
//
// This file is part of SDLPAL.
//
// SDLPAL is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License, version 3
// as published by the Free Software Foundation.
//
// 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, see <http://www.gnu.org/licenses/>.
//
#include "palcommon.h"
#include "global.h"
#include "palcfg.h"
#include "audio.h"
#include "players.h"
#include "util.h"
#include "resampler.h"
#include "midi.h"
#include "riff.h"
#include <math.h>
typedef struct tagWAVESPEC
{
int size;
int freq;
#if SDL_VERSION_ATLEAST(2,0,0)
SDL_AudioFormat format;
#else
uint16_t format;
#endif
uint8_t channels;
uint8_t align;
} WAVESPEC;
typedef const void * (*SoundLoader)(LPCBYTE, DWORD, WAVESPEC *);
typedef int(*ResampleMixer)(void *[2], const void *, const WAVESPEC *, void *, int, const void **);
typedef struct tagWAVEDATA
{
struct tagWAVEDATA *next;
void *resampler[2]; /* The resampler used for sound data */
ResampleMixer ResampleMix;
const void *base;
const void *current;
const void *end;
WAVESPEC spec;
} WAVEDATA;
typedef struct tagSOUNDPLAYER
{
AUDIOPLAYER_COMMONS;
FILE *mkf; /* File pointer to the MKF file */
SoundLoader LoadSound; /* The function pointer for load WAVE/VOC data */
WAVEDATA soundlist;
int cursounds;
int lastSFX;
} SOUNDPLAYER, *LPSOUNDPLAYER;
static const void *
SOUND_LoadWAVEData(
LPCBYTE lpData,
DWORD dwLen,
WAVESPEC *lpSpec
)
/*++
Purpose:
Return the WAVE data pointer inside the input buffer.
Parameters:
[IN] lpData - pointer to the buffer of the WAVE file.
[IN] dwLen - length of the buffer of the WAVE file.
[OUT] lpSpec - pointer to the SDL_AudioSpec structure, which contains
some basic information about the WAVE file.
Return value:
Pointer to the WAVE data inside the input buffer, NULL if failed.
--*/
{
const RIFFHeader *lpRiff = (const RIFFHeader *)lpData;
const RIFFChunkHeader *lpChunk = NULL;
const WAVEFormatPCM *lpFormat = NULL;
const uint8_t *lpWaveData = NULL;
uint32_t len,type;
if (dwLen < sizeof(RIFFHeader) || SDL_SwapLE32(lpRiff->signature) != RIFF_RIFF ||
SDL_SwapLE32(lpRiff->type) != RIFF_WAVE || dwLen < SDL_SwapLE32(lpRiff->length) + 8)
{
return NULL;
}
lpChunk = (const RIFFChunkHeader *)(lpRiff + 1); dwLen -= sizeof(RIFFHeader);
while (dwLen >= sizeof(RIFFChunkHeader))
{
len = SDL_SwapLE32(lpChunk->length);
type = SDL_SwapLE32(lpChunk->type);
if (dwLen >= sizeof(RIFFChunkHeader) + len)
dwLen -= sizeof(RIFFChunkHeader) + len;
else
return NULL;
switch (type)
{
case WAVE_fmt:
lpFormat = (const WAVEFormatPCM *)(lpChunk + 1);
if (len != sizeof(WAVEFormatPCM) || lpFormat->wFormatTag != SDL_SwapLE16(0x0001))
{
return NULL;
}
break;
case WAVE_data:
lpWaveData = (const uint8_t *)(lpChunk + 1);
dwLen = 0;
break;
}
lpChunk = (const RIFFChunkHeader *)((const uint8_t *)(lpChunk + 1) + len);
}
if (lpFormat == NULL || lpWaveData == NULL)
{
return NULL;
}
lpSpec->channels = SDL_SwapLE16(lpFormat->nChannels);
lpSpec->format = (SDL_SwapLE16(lpFormat->wBitsPerSample) == 16) ? AUDIO_S16 : AUDIO_U8;
lpSpec->freq = SDL_SwapLE32(lpFormat->nSamplesPerSec);
lpSpec->size = len;
lpSpec->align = SDL_SwapLE16(lpFormat->nChannels) * SDL_SwapLE16(lpFormat->wBitsPerSample) >> 3;
return lpWaveData;
}
typedef struct tagVOCHEADER
{
char signature[0x14]; /* "Creative Voice File\x1A" */
WORD data_offset; /* little endian */
WORD version;
WORD version_checksum;
} VOCHEADER, *LPVOCHEADER;
typedef const VOCHEADER *LPCVOCHEADER;
static const void *
SOUND_LoadVOCData(
LPCBYTE lpData,
DWORD dwLen,
WAVESPEC *lpSpec
)
/*++
Purpose:
Return the VOC data pointer inside the input buffer. Currently supports type 01 block only.
Parameters:
[IN] lpData - pointer to the buffer of the VOC file.
[IN] dwLen - length of the buffer of the VOC file.
[OUT] lpSpec - pointer to the SDL_AudioSpec structure, which contains
some basic information about the VOC file.
Return value:
Pointer to the WAVE data inside the input buffer, NULL if failed.
Reference: http://sox.sourceforge.net/AudioFormats-11.html
--*/
{
LPCVOCHEADER lpVOC = (LPCVOCHEADER)lpData;
if (dwLen < sizeof(VOCHEADER) || memcmp(lpVOC->signature, "Creative Voice File\x1A", 0x14) || SDL_SwapLE16(lpVOC->data_offset) >= dwLen)
{
return NULL;
}
lpData += SDL_SwapLE16(lpVOC->data_offset);
dwLen -= SDL_SwapLE16(lpVOC->data_offset);
while (dwLen && *lpData)
{
DWORD len;
if (dwLen >= 4)
{
len = lpData[1] | (lpData[2] << 8) | (lpData[3] << 16);
if (dwLen >= len + 4)
dwLen -= len + 4;
else
return NULL;
}
else
{
return NULL;
}
if (*lpData == 0x01)
{
if (lpData[5] != 0) return NULL; /* Only 8-bit is supported */
lpSpec->format = AUDIO_U8;
lpSpec->channels = 1;
lpSpec->freq = ((1000000 / (256 - lpData[4]) + 99) / 100) * 100; /* Round to next 100Hz */
lpSpec->size = len - 2;
lpSpec->align = 1;
return lpData + 6;
}
else
{
lpData += len + 4;
}
}
return NULL;
}
static int
SOUND_ResampleMix_U8_Mono_Mono(
void *resampler[2],
const void *lpData,
const WAVESPEC *lpSpec,
void *lpBuffer,
int iBufLen,
const void **llpData
)
/*++
Purpose:
Resample 8-bit unsigned mono PCM data into 16-bit signed (native-endian) mono PCM data.
Parameters:
[IN] resampler - array of pointers to the resampler instance.
[IN] lpData - pointer to the buffer of the input PCM data.
[IN] lpSpec - pointer to the WAVESPEC structure, which contains
some basic information about the input PCM data.
[IN] lpBuffer - pointer of the buffer of the output PCM data.
[IN] iBufLen - length of the buffer of the output PCM data.
[OUT] llpData - pointer to receive the pointer of remaining input PCM data.
Return value:
The number of output buffer used, in bytes.
--*/
{
int src_samples = lpSpec->size;
const uint8_t * src = (const uint8_t *)lpData;
short *dst = (short *)lpBuffer;
int channel_len = iBufLen, total_bytes = 0;
while (total_bytes < channel_len && src_samples > 0)
{
int j, to_write = resampler_get_free_count(resampler[0]);
if (to_write > src_samples) to_write = src_samples;
for (j = 0; j < to_write; j++)
resampler_write_sample(resampler[0], (*src++ ^ 0x80) << 8);
src_samples -= to_write;
while (total_bytes < channel_len && resampler_get_sample_count(resampler[0]) > 0)
{
int sample = (resampler_get_sample(resampler[0]) >> 8) + *dst;
*dst++ = (sample <= 32767) ? ((sample >= -32768) ? sample : -32768) : 32767;
total_bytes += sizeof(short);
resampler_remove_sample(resampler[0]);
}
}
if (llpData) *llpData = src;
return total_bytes;
}
static int
SOUND_ResampleMix_U8_Mono_Stereo(
void *resampler[2],
const void *lpData,
const WAVESPEC *lpSpec,
void *lpBuffer,
int iBufLen,
const void **llpData
)
/*++
Purpose:
Resample 8-bit unsigned mono PCM data into 16-bit signed (native-endian) stereo PCM data.
Parameters:
[IN] resampler - array of pointers to the resampler instance.
[IN] lpData - pointer to the buffer of the input PCM data.
[IN] lpSpec - pointer to the WAVESPEC structure, which contains
some basic information about the input PCM data.
[IN] lpBuffer - pointer of the buffer of the output PCM data.
[IN] iBufLen - length of the buffer of the output PCM data.
[OUT] llpData - pointer to receive the pointer of remaining input PCM data.
Return value:
The number of output buffer used, in bytes.
--*/
{
int src_samples = lpSpec->size;
const uint8_t * src = (const uint8_t *)lpData;
short *dst = (short *)lpBuffer;
int channel_len = iBufLen >> 1, total_bytes = 0;
while (total_bytes < channel_len && src_samples > 0)
{
int j, to_write = resampler_get_free_count(resampler[0]);
if (to_write > src_samples) to_write = src_samples;
for (j = 0; j < to_write; j++)
resampler_write_sample(resampler[0], (*src++ ^ 0x80) << 8);
src_samples -= to_write;
while (total_bytes < channel_len && resampler_get_sample_count(resampler[0]) > 0)
{
int sample = (resampler_get_sample(resampler[0]) >> 8) + *dst;
dst[0] = dst[1] = (sample <= 32767) ? ((sample >= -32768) ? sample : -32768) : 32767;
total_bytes += sizeof(short); dst += 2;
resampler_remove_sample(resampler[0]);
}
}
if (llpData) *llpData = src;
return total_bytes;
}
static int
SOUND_ResampleMix_U8_Stereo_Mono(
void *resampler[2],
const void *lpData,
const WAVESPEC *lpSpec,
void *lpBuffer,
int iBufLen,
const void **llpData
)
/*++
Purpose:
Resample 8-bit unsigned stereo PCM data into 16-bit signed (native-endian) mono PCM data.
Parameters:
[IN] resampler - array of pointers to the resampler instance.
[IN] lpData - pointer to the buffer of the input PCM data.
[IN] lpSpec - pointer to the WAVESPEC structure, which contains
some basic information about the input PCM data.
[IN] lpBuffer - pointer of the buffer of the output PCM data.
[IN] iBufLen - length of the buffer of the output PCM data.
[OUT] llpData - pointer to receive the pointer of remaining input PCM data.
Return value:
The number of output buffer used, in bytes.
--*/
{
int src_samples = lpSpec->size >> 1;
const uint8_t * src = (const uint8_t *)lpData;
short *dst = (short *)lpBuffer;
int channel_len = iBufLen, total_bytes = 0;
while (total_bytes < channel_len && src_samples > 0)
{
int j, to_write = resampler_get_free_count(resampler[0]);
if (to_write > src_samples) to_write = src_samples;
for (j = 0; j < to_write; j++)
{
resampler_write_sample(resampler[0], (*src++ ^ 0x80) << 8);
resampler_write_sample(resampler[1], (*src++ ^ 0x80) << 8);
}
src_samples -= to_write;
while (total_bytes < channel_len && resampler_get_sample_count(resampler[0]) > 0)
{
int sample = (((resampler_get_sample(resampler[0]) >> 8) + (resampler_get_sample(resampler[1]) >> 8)) >> 1) + *dst;
*dst++ = (sample <= 32767) ? ((sample >= -32768) ? sample : -32768) : 32767;
total_bytes += sizeof(short);
resampler_remove_sample(resampler[0]);
resampler_remove_sample(resampler[1]);
}
}
if (llpData) *llpData = src;
return total_bytes;
}
static int
SOUND_ResampleMix_U8_Stereo_Stereo(
void *resampler[2],
const void *lpData,
const WAVESPEC *lpSpec,
void *lpBuffer,
int iBufLen,
const void **llpData
)
/*++
Purpose:
Resample 8-bit unsigned stereo PCM data into 16-bit signed (native-endian) stereo PCM data.
Parameters:
[IN] resampler - array of pointers to the resampler instance.
[IN] lpData - pointer to the buffer of the input PCM data.
[IN] lpSpec - pointer to the WAVESPEC structure, which contains
some basic information about the input PCM data.
[IN] lpBuffer - pointer of the buffer of the output PCM data.
[IN] iBufLen - length of the buffer of the output PCM data.
[OUT] llpData - pointer to receive the pointer of remaining input PCM data.
Return value:
The number of output buffer used, in bytes.
--*/
{
int src_samples = lpSpec->size >> 1;
const uint8_t * src = (const uint8_t *)lpData;
short *dst = (short *)lpBuffer;
int channel_len = iBufLen >> 1, total_bytes = 0;
while (total_bytes < channel_len && src_samples > 0)
{
int j, to_write = resampler_get_free_count(resampler[0]);
if (to_write > src_samples) to_write = src_samples;
for (j = 0; j < to_write; j++)
{
resampler_write_sample(resampler[0], (*src++ ^ 0x80) << 8);
resampler_write_sample(resampler[1], (*src++ ^ 0x80) << 8);
}
src_samples -= to_write;
while (total_bytes < channel_len && resampler_get_sample_count(resampler[0]) > 0)
{
int sample;
sample = (resampler_get_sample(resampler[0]) >> 8) + *dst;
*dst++ = (sample <= 32767) ? ((sample >= -32768) ? sample : -32768) : 32767;
sample = (resampler_get_sample(resampler[1]) >> 8) + *dst;
*dst++ = (sample <= 32767) ? ((sample >= -32768) ? sample : -32768) : 32767;
total_bytes += sizeof(short);
resampler_remove_sample(resampler[0]);
resampler_remove_sample(resampler[1]);
}
}
if (llpData) *llpData = src;
return total_bytes;
}
static int
SOUND_ResampleMix_S16_Mono_Mono(
void *resampler[2],
const void *lpData,
const WAVESPEC *lpSpec,
void *lpBuffer,
int iBufLen,
const void **llpData
)
/*++
Purpose:
Resample 16-bit signed (little-endian) mono PCM data into 16-bit signed (native-endian) mono PCM data.
Parameters:
[IN] resampler - array of pointers to the resampler instance.
[IN] lpData - pointer to the buffer of the input PCM data.
[IN] lpSpec - pointer to the WAVESPEC structure, which contains
some basic information about the input PCM data.
[IN] lpBuffer - pointer of the buffer of the output PCM data.
[IN] iBufLen - length of the buffer of the output PCM data.
[OUT] llpData - pointer to receive the pointer of remaining input PCM data.
Return value:
The number of output buffer used, in bytes.
--*/
{
int src_samples = lpSpec->size >> 1;
const short * src = (const short *)lpData;
short *dst = (short *)lpBuffer;
int channel_len = iBufLen, total_bytes = 0;
while (total_bytes < channel_len && src_samples > 0)
{
int j, to_write = resampler_get_free_count(resampler[0]);
if (to_write > src_samples) to_write = src_samples;
for (j = 0; j < to_write; j++)
resampler_write_sample(resampler[0], SDL_SwapLE16(*src++));
src_samples -= to_write;
while (total_bytes < channel_len && resampler_get_sample_count(resampler[0]) > 0)
{
int sample = (resampler_get_sample(resampler[0]) >> 8) + *dst;
*dst++ = (sample <= 32767) ? ((sample >= -32768) ? sample : -32768) : 32767;
total_bytes += sizeof(short);
resampler_remove_sample(resampler[0]);
}
}
if (llpData) *llpData = src;
return total_bytes;
}
static int
SOUND_ResampleMix_S16_Mono_Stereo(
void *resampler[2],
const void *lpData,
const WAVESPEC *lpSpec,
void *lpBuffer,
int iBufLen,
const void **llpData
)
/*++
Purpose:
Resample 16-bit signed (little-endian) mono PCM data into 16-bit signed (native-endian) stereo PCM data.
Parameters:
[IN] resampler - array of pointers to the resampler instance.
[IN] lpData - pointer to the buffer of the input PCM data.
[IN] lpSpec - pointer to the WAVESPEC structure, which contains
some basic information about the input PCM data.
[IN] lpBuffer - pointer of the buffer of the output PCM data.
[IN] iBufLen - length of the buffer of the output PCM data.
[OUT] llpData - pointer to receive the pointer of remaining input PCM data.
Return value:
The number of output buffer used, in bytes.
--*/
{
int src_samples = lpSpec->size >> 1;
const short * src = (const short *)lpData;
short *dst = (short *)lpBuffer;
int channel_len = iBufLen >> 1, total_bytes = 0;
while (total_bytes < channel_len && src_samples > 0)
{
int j, to_write = resampler_get_free_count(resampler[0]);
if (to_write > src_samples) to_write = src_samples;
for (j = 0; j < to_write; j++)
resampler_write_sample(resampler[0], SDL_SwapLE16(*src++));
src_samples -= to_write;
while (total_bytes < channel_len && resampler_get_sample_count(resampler[0]) > 0)
{
int sample = (resampler_get_sample(resampler[0]) >> 8) + *dst;
dst[0] = dst[1] = (sample <= 32767) ? ((sample >= -32768) ? sample : -32768) : 32767;
total_bytes += sizeof(short); dst += 2;
resampler_remove_sample(resampler[0]);
}
}
if (llpData) *llpData = src;
return total_bytes;
}
static int
SOUND_ResampleMix_S16_Stereo_Mono(
void *resampler[2],
const void *lpData,
const WAVESPEC *lpSpec,
void *lpBuffer,
int iBufLen,
const void **llpData
)
/*++
Purpose:
Resample 16-bit signed (little-endian) stereo PCM data into 16-bit signed (native-endian) mono PCM data.
Parameters:
[IN] resampler - array of pointers to the resampler instance.
[IN] lpData - pointer to the buffer of the input PCM data.
[IN] lpSpec - pointer to the WAVESPEC structure, which contains
some basic information about the input PCM data.
[IN] lpBuffer - pointer of the buffer of the output PCM data.
[IN] iBufLen - length of the buffer of the output PCM data.
[OUT] llpData - pointer to receive the pointer of remaining input PCM data.
Return value:
The number of output buffer used, in bytes.
--*/
{
int src_samples = lpSpec->size >> 2;
const short * src = (const short *)lpData;
short *dst = (short *)lpBuffer;
int channel_len = iBufLen, total_bytes = 0;
while (total_bytes < channel_len && src_samples > 0)
{
int j, to_write = resampler_get_free_count(resampler[0]);
if (to_write > src_samples) to_write = src_samples;
for (j = 0; j < to_write; j++)
{
resampler_write_sample(resampler[0], SDL_SwapLE16(*src++));
resampler_write_sample(resampler[1], SDL_SwapLE16(*src++));
}
src_samples -= to_write;
while (total_bytes < channel_len && resampler_get_sample_count(resampler[0]) > 0)
{
int sample = (((resampler_get_sample(resampler[0]) >> 8) + (resampler_get_sample(resampler[1]) >> 8)) >> 1) + *dst;
*dst++ = (sample <= 32767) ? ((sample >= -32768) ? sample : -32768) : 32767;
total_bytes += sizeof(short);
resampler_remove_sample(resampler[0]);
resampler_remove_sample(resampler[1]);
}
}
if (llpData) *llpData = src;
return total_bytes;
}
static int
SOUND_ResampleMix_S16_Stereo_Stereo(
void *resampler[2],
const void *lpData,
const WAVESPEC *lpSpec,
void *lpBuffer,
int iBufLen,
const void **llpData
)
/*++
Purpose:
Resample 16-bit signed (little-endian) stereo PCM data into 16-bit signed (native-endian) stereo PCM data.
Parameters:
[IN] resampler - array of pointers to the resampler instance.
[IN] lpData - pointer to the buffer of the input PCM data.
[IN] lpSpec - pointer to the WAVESPEC structure, which contains
some basic information about the input PCM data.
[IN] lpBuffer - pointer of the buffer of the output PCM data.
[IN] iBufLen - length of the buffer of the output PCM data.
[OUT] llpData - pointer to receive the pointer of remaining input PCM data.
Return value:
The number of output buffer used, in bytes.
--*/
{
int src_samples = lpSpec->size >> 2;
const short * src = (const short *)lpData;
short *dst = (short *)lpBuffer;
int channel_len = iBufLen >> 1, total_bytes = 0;
while (total_bytes < channel_len && src_samples > 0)
{
int j, to_write = resampler_get_free_count(resampler[0]);
if (to_write > src_samples) to_write = src_samples;
for (j = 0; j < to_write; j++)
{
resampler_write_sample(resampler[0], SDL_SwapLE16(*src++));
resampler_write_sample(resampler[1], SDL_SwapLE16(*src++));
}
src_samples -= to_write;
while (total_bytes < channel_len && resampler_get_sample_count(resampler[0]) > 0)
{
int sample;
sample = (resampler_get_sample(resampler[0]) >> 8) + *dst;
*dst++ = (sample <= 32767) ? ((sample >= -32768) ? sample : -32768) : 32767;
sample = (resampler_get_sample(resampler[1]) >> 8) + *dst;
*dst++ = (sample <= 32767) ? ((sample >= -32768) ? sample : -32768) : 32767;
total_bytes += sizeof(short);
resampler_remove_sample(resampler[0]);
resampler_remove_sample(resampler[1]);
}
}
if (llpData) *llpData = src;
return total_bytes;
}
static BOOL
SOUND_Play(
VOID *object,
INT iSoundNum,
BOOL fLoop,
FLOAT flFadeTime
)
/*++
Purpose:
Play a sound in voc.mkf/sounds.mkf file.
Parameters:
[IN] object - Pointer to the SOUNDPLAYER instance.
[IN] iSoundNum - number of the sound; the absolute value is used.
[IN] fLoop - Not used, should be zero.
[IN] flFadeTime - Not used, should be zero.
Return value:
None.
--*/
{
LPSOUNDPLAYER player = (LPSOUNDPLAYER)object;
const SDL_AudioSpec *devspec = AUDIO_GetDeviceSpec();
WAVESPEC wavespec;
ResampleMixer mixer;
WAVEDATA *cursnd;
void *buf;
const void *snddata;
int len, i;
//
// Check for NULL pointer.
//
if (player == NULL)
{
return FALSE;
}
if (player->lastSFX == iSoundNum)
return FALSE;
player->lastSFX = iSoundNum;
//
// Get the length of the sound file.
//
len = PAL_MKFGetChunkSize(iSoundNum, player->mkf);
if (len <= 0)
{
return FALSE;
}
buf = malloc(len);
if (buf == NULL)
{
return FALSE;
}
//
// Read the sound file from the MKF archive.
//
PAL_MKFReadChunk(buf, len, iSoundNum, player->mkf);
snddata = player->LoadSound(buf, len, &wavespec);
if (snddata == NULL)
{
free(buf);
return FALSE;
}
if (wavespec.channels == 1 && devspec->channels == 1)
mixer = (wavespec.format == AUDIO_S16) ? SOUND_ResampleMix_S16_Mono_Mono : SOUND_ResampleMix_U8_Mono_Mono;
else if (wavespec.channels == 1 && devspec->channels == 2)
mixer = (wavespec.format == AUDIO_S16) ? SOUND_ResampleMix_S16_Mono_Stereo : SOUND_ResampleMix_U8_Mono_Stereo;
else if (wavespec.channels == 2 && devspec->channels == 1)
mixer = (wavespec.format == AUDIO_S16) ? SOUND_ResampleMix_S16_Stereo_Mono : SOUND_ResampleMix_U8_Stereo_Mono;
else if (wavespec.channels == 2 && devspec->channels == 2)
mixer = (wavespec.format == AUDIO_S16) ? SOUND_ResampleMix_S16_Stereo_Stereo : SOUND_ResampleMix_U8_Stereo_Stereo;
else
{
free(buf);
return FALSE;
}
AUDIO_Lock();
cursnd = &player->soundlist;
while (cursnd->next && cursnd->base)
cursnd = cursnd->next;
if (cursnd->base)
{
WAVEDATA *obj = (WAVEDATA *)malloc(sizeof(WAVEDATA));
memset(obj, 0, sizeof(WAVEDATA));
cursnd->next = obj;
cursnd = cursnd->next;
}
for (i = 0; i < wavespec.channels; i++)
{
if (!cursnd->resampler[i])
cursnd->resampler[i] = resampler_create();
else
resampler_clear(cursnd->resampler[i]);
resampler_set_quality(cursnd->resampler[i], AUDIO_IsIntegerConversion(wavespec.freq) ? RESAMPLER_QUALITY_MIN : gConfig.iResampleQuality);
resampler_set_rate(cursnd->resampler[i], (double)wavespec.freq / (double)devspec->freq);
}
cursnd->base = buf;
cursnd->current = snddata;
cursnd->end = (const uint8_t *)snddata + wavespec.size;
cursnd->spec = wavespec;
cursnd->ResampleMix = mixer;
player->cursounds++;
AUDIO_Unlock();
return TRUE;
}
VOID
SOUND_Shutdown(
VOID *object
)
/*++
Purpose:
Shutdown the sound subsystem.
Parameters:
None.
Return value:
None.
--*/
{
LPSOUNDPLAYER player = (LPSOUNDPLAYER)object;
if (player)
{
WAVEDATA *cursnd = &player->soundlist;
do
{
if (cursnd->resampler[0]) resampler_delete(cursnd->resampler[0]);
if (cursnd->resampler[1]) resampler_delete(cursnd->resampler[1]);
if (cursnd->base) free((void *)cursnd->base);
} while ((cursnd = cursnd->next) != NULL);
cursnd = player->soundlist.next;
while (cursnd)
{
WAVEDATA *old = cursnd;
cursnd = cursnd->next;
free(old);
}
if (player->mkf) fclose(player->mkf);
}
}
static VOID
SOUND_FillBuffer(
VOID *object,
LPBYTE stream,
INT len
)
/*++
Purpose:
Fill the background music into the sound buffer. Called by the SDL sound
callback function only (audio.c: AUDIO_FillBuffer).
Parameters:
[OUT] stream - pointer to the stream buffer.
[IN] len - Length of the buffer.
Return value:
None.
--*/
{
LPSOUNDPLAYER player = (LPSOUNDPLAYER)object;
if (player)
{
WAVEDATA *cursnd = &player->soundlist;
int sounds = 0;
do
{
if (cursnd->base)
{
cursnd->ResampleMix(cursnd->resampler, cursnd->current, &cursnd->spec, stream, len, &cursnd->current);
cursnd->spec.size = (const uint8_t *)cursnd->end - (const uint8_t *)cursnd->current;
if (cursnd->spec.size < cursnd->spec.align)
{
free((void *)cursnd->base);
cursnd->base = cursnd->current = cursnd->end = NULL;
player->cursounds--;
player->lastSFX = 0;
}
else
sounds++;
}
} while ((cursnd = cursnd->next) && sounds < player->cursounds);
}
}
LPAUDIOPLAYER
SOUND_Init(
VOID
)
/*++
Purpose:
Initialize the sound subsystem.
Parameters:
None.
Return value:
None.
--*/
{
char *mkfs[2];
SoundLoader func[2];
int i;
if (gConfig.fIsWIN95)
{
mkfs[0] = "sounds.mkf"; func[0] = SOUND_LoadWAVEData;
mkfs[1] = "voc.mkf"; func[1] = SOUND_LoadVOCData;
}
else
{
mkfs[0] = "voc.mkf"; func[0] = SOUND_LoadVOCData;
mkfs[1] = "sounds.mkf"; func[1] = SOUND_LoadWAVEData;
}
for (i = 0; i < 2; i++)
{
FILE *mkf = UTIL_OpenFile(mkfs[i]);
if (mkf)
{
LPSOUNDPLAYER player = (LPSOUNDPLAYER)malloc(sizeof(SOUNDPLAYER));
memset(&player->soundlist, 0, sizeof(WAVEDATA));
player->Play = SOUND_Play;
player->FillBuffer = SOUND_FillBuffer;
player->Shutdown = SOUND_Shutdown;
player->LoadSound = func[i];
player->mkf = mkf;
player->soundlist.resampler[0] = resampler_create();
player->soundlist.resampler[1] = resampler_create();
player->cursounds = 0;
return (LPAUDIOPLAYER)player;
}
}
return NULL;
}
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