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Refactor the SDL part of S_RawSamples into the backend

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This commit is contained in:
Yamagi Burmeister 2013-04-20 13:16:40 +02:00
parent 2c356d142e
commit d9643e8b76
3 changed files with 97 additions and 82 deletions
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94
src/backends/sdl/sound.c
View file

@ -884,6 +884,100 @@ SDL_Cache(sfx_t *sfx, wavinfo_t *info, byte *data)
return true;
}
/*
* Playback of "raw samples", e.g. samples
* without an origin entity. Used for music
* and cinematic playback.
*/
void
SDL_RawSamples(int samples, int rate, int width,
int channels, byte *data, float volume)
{
float scale;
int dst;
int i;
int src;
int intVolume;
scale = (float)rate / dma.speed;
intVolume = (int)(256 * volume);
if ((channels == 2) && (width == 2))
{
for (i = 0; ; i++)
{
src = (int)(i * scale);
if (src >= samples)
{
break;
}
dst = s_rawend & (MAX_RAW_SAMPLES - 1);
s_rawend++;
s_rawsamples[dst].left = ((short *)data)[src * 2] * intVolume;
s_rawsamples[dst].right = ((short *)data)[src * 2 + 1] * intVolume;
}
}
else if ((channels == 1) && (width == 2))
{
for (i = 0; ; i++)
{
src = (int)(i * scale);
if (src >= samples)
{
break;
}
dst = s_rawend & (MAX_RAW_SAMPLES - 1);
s_rawend++;
s_rawsamples[dst].left = ((short *)data)[src] * intVolume;
s_rawsamples[dst].right = ((short *)data)[src] * intVolume;
}
}
else if ((channels == 2) && (width == 1))
{
intVolume *= 256;
for (i = 0; ; i++)
{
src = (int)(i * scale);
if (src >= samples)
{
break;
}
dst = s_rawend & (MAX_RAW_SAMPLES - 1);
s_rawend++;
s_rawsamples[dst].left =
(((byte *)data)[src * 2] - 128) * intVolume;
s_rawsamples[dst].right =
(((byte *)data)[src * 2 + 1] - 128) * intVolume;
}
}
else if ((channels == 1) && (width == 1))
{
intVolume *= 256;
for (i = 0; ; i++)
{
src = (int)(i * scale);
if (src >= samples)
{
break;
}
dst = s_rawend & (MAX_RAW_SAMPLES - 1);
s_rawend++;
s_rawsamples[dst].left = (((byte *)data)[src] - 128) * intVolume;
s_rawsamples[dst].right = (((byte *)data)[src] - 128) * intVolume;
}
}
}
/* ------------------------------------------------------------------ */
/*

1
src/client/sound/header/local.h
View file

@ -181,6 +181,7 @@ channel_t *S_PickChannel(int entnum, int entchannel);
/* spatializes a channel */
void SDL_Spatialize(channel_t *ch);
void SDL_RawSamples(int samples, int rate, int width, int channels, byte *data, float volume);
void S_BuildSoundList(int *sounds);

84
src/client/sound/snd_dma.c
View file

@ -941,11 +941,6 @@ void
S_RawSamples(int samples, int rate, int width,
int channels, byte *data, float volume)
{
int i;
int src, dst;
float scale;
int intVolume;
if (!sound_started)
{
return;
@ -961,86 +956,11 @@ S_RawSamples(int samples, int rate, int width,
{
volume = volume * (s_volume->value);
AL_RawSamples(samples, rate, width, channels, data, volume);
return;
}
else
#endif
scale = (float)rate / dma.speed;
intVolume = (int)(256 * volume);
if ((channels == 2) && (width == 2))
{
for (i = 0; ; i++)
{
src = (int)(i * scale);
if (src >= samples)
{
break;
}
dst = s_rawend & (MAX_RAW_SAMPLES - 1);
s_rawend++;
s_rawsamples[dst].left = ((short *)data)[src * 2] * intVolume;
s_rawsamples[dst].right = ((short *)data)[src * 2 + 1] * intVolume;
}
}
else if ((channels == 1) && (width == 2))
{
for (i = 0; ; i++)
{
src = (int)(i * scale);
if (src >= samples)
{
break;
}
dst = s_rawend & (MAX_RAW_SAMPLES - 1);
s_rawend++;
s_rawsamples[dst].left = ((short *)data)[src] * intVolume;
s_rawsamples[dst].right = ((short *)data)[src] * intVolume;
}
}
else if ((channels == 2) && (width == 1))
{
intVolume *= 256;
for (i = 0; ; i++)
{
src = (int)(i * scale);
if (src >= samples)
{
break;
}
dst = s_rawend & (MAX_RAW_SAMPLES - 1);
s_rawend++;
s_rawsamples[dst].left =
(((byte *)data)[src * 2] - 128) * intVolume;
s_rawsamples[dst].right =
(((byte *)data)[src * 2 + 1] - 128) * intVolume;
}
}
else if ((channels == 1) && (width == 1))
{
intVolume *= 256;
for (i = 0; ; i++)
{
src = (int)(i * scale);
if (src >= samples)
{
break;
}
dst = s_rawend & (MAX_RAW_SAMPLES - 1);
s_rawend++;
s_rawsamples[dst].left = (((byte *)data)[src] - 128) * intVolume;
s_rawsamples[dst].right = (((byte *)data)[src] - 128) * intVolume;
}
SDL_RawSamples(samples, rate, width, channels, data, volume);
}
}