static void getsfx (struct sfxinfo_struct *sfx)
{
Uint32 samplerate;
Uint32 length ,expanded_length;
Uint8 *data;
Uint32 new_size = 0;
Mix_Chunk *chunk;
data = (Uint8 *)W_CacheLumpNum(sfx->lumpnum, PU_STATIC);
// [Russell] - ICKY QUICKY HACKY SPACKY *I HATE THIS SOUND MANAGEMENT SYSTEM!*
// get the lump size, shouldn't this be filled in elsewhere?
sfx->length = W_LumpLength(sfx->lumpnum);
// [Russell] is it not a doom sound lump?
if (((data[1] << 8) | data[0]) != 3)
{
chunk = (Mix_Chunk *)Z_Malloc(sizeof(Mix_Chunk), PU_STATIC, NULL);
chunk->allocated = 1;
chunk->abuf = perform_sdlmix_conv(data, sfx->length, &new_size);
chunk->alen = new_size;
chunk->volume = MIX_MAX_VOLUME;
sfx->data = chunk;
Z_ChangeTag(data, PU_CACHE);
return;
}
samplerate = (data[3] << 8) | data[2];
length = (data[5] << 8) | data[4];
// [Russell] - Ignore doom's sound format length info
// if the lump is longer than the value, fixes exec.wad's ssg
length = (sfx->length - 8 > length) ? sfx->length - 8 : length;
expanded_length = (uint32_t) ((((uint64_t) length) * mixer_freq) / samplerate);
// Double up twice: 8 -> 16 bit and mono -> stereo
expanded_length *= 4;
chunk = (Mix_Chunk *)Z_Malloc(sizeof(Mix_Chunk), PU_STATIC, NULL);
chunk->allocated = 1;
chunk->alen = expanded_length;
chunk->abuf
= (Uint8 *)Z_Malloc(expanded_length, PU_STATIC, &chunk->abuf);
chunk->volume = MIX_MAX_VOLUME;
ExpandSoundData((unsigned char *)data + 8,
samplerate,
length,
chunk);
sfx->data = chunk;
Z_ChangeTag(data, PU_CACHE);
}
// Load and convert a sound effect
// Returns true if successful
static dboolean CacheSFX(sfxinfo_t *sfxinfo)
{
int lumpnum;
unsigned int lumplen;
int samplerate;
unsigned int length;
byte *data;
// need to load the sound
lumpnum = sfxinfo->lumpnum;
data = W_CacheLumpNum(lumpnum, PU_STATIC);
lumplen = W_LumpLength(lumpnum);
// Check the header, and ensure this is a valid sound
if (lumplen < 8 || data[0] != 0x03 || data[1] != 0x00)
{
// Invalid sound
return false;
}
// 16 bit sample rate field, 32 bit length field
samplerate = ((data[3] << 8) | data[2]);
length = ((data[7] << 24) | (data[6] << 16) | (data[5] << 8) | data[4]);
// If the header specifies that the length of the sound is greater than
// the length of the lump itself, this is an invalid sound lump
// We also discard sound lumps that are less than 49 samples long,
// as this is how DMX behaves - although the actual cut-off length
// seems to vary slightly depending on the sample rate. This needs
// further investigation to better understand the correct
// behavior.
if (length > lumplen - 8 || length <= 48)
return false;
// The DMX sound library seems to skip the first 16 and last 16
// bytes of the lump - reason unknown.
data += 16;
length -= 32;
// Sample rate conversion
if (!ExpandSoundData(sfxinfo, data + 8, samplerate, length))
return false;
// don't need the original lump any more
W_ReleaseLumpNum(lumpnum);
return true;
}
static boolean CacheSFX(sfxinfo_t *sfxinfo)
{
int lumpnum;
unsigned int lumplen;
int samplerate;
unsigned int length;
byte *data;
// need to load the sound
lumpnum = sfxinfo->lumpnum;
data = W_CacheLumpNum(lumpnum, PU_STATIC);
lumplen = W_LumpLength(lumpnum);
// Check the header, and ensure this is a valid sound
if (lumplen < 8
|| data[0] != 0x03 || data[1] != 0x00)
{
// Invalid sound
return false;
}
// 16 bit sample rate field, 32 bit length field
samplerate = (data[3] << 8) | data[2];
length = (data[7] << 24) | (data[6] << 16) | (data[5] << 8) | data[4];
// If the header specifies that the length of the sound is greater than
// the length of the lump itself, this is an invalid sound lump
// We also discard sound lumps that are less than 49 samples long,
// as this is how DMX behaves - although the actual cut-off length
// seems to vary slightly depending on the sample rate. This needs
// further investigation to better understand the correct
// behavior.
if (length > lumplen - 8 || length <= 48)
{
return false;
}
// The DMX sound library seems to skip the first 16 and last 16
// bytes of the lump - reason unknown.
data += 16;
length -= 32;
// Sample rate conversion
if (!ExpandSoundData(sfxinfo, data + 8, samplerate, length))
{
return false;
}
#ifdef DEBUG_DUMP_WAVS
{
char filename[16];
allocated_sound_t * snd;
M_snprintf(filename, sizeof(filename), "%s.wav",
DEH_String(sfxinfo->name));
snd = GetAllocatedSoundBySfxInfoAndPitch(sfxinfo, NORM_PITCH);
WriteWAV(filename, snd->chunk.abuf, snd->chunk.alen,mixer_freq);
}
#endif
// don't need the original lump any more
W_ReleaseLumpNum(lumpnum);
return true;
}
