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Restructure and refactor snd_al.c

This commit is contained in:
Yamagi Burmeister 2013-04-21 10:40:00 +02:00
parent e5505f90d7
commit b9e71913ae
1 changed files with 324 additions and 237 deletions
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561
src/client/sound/snd_al.c
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@ -35,166 +35,108 @@
#include "header/local.h"
#include "header/vorbis.h"
/* translates from AL coordinate system to quake */
#define AL_UnpackVector(v) - v[1], v[2], -v[0]
#define AL_CopyVector(a, b) ((b)[0] = -(a)[1], (b)[1] = (a)[2], (b)[2] = \
-(a)[0])
#define AL_CopyVector(a, b) ((b)[0] = -(a)[1], (b)[1] = (a)[2], (b)[2] = -(a)[0])
/* OpenAL implementation should support at least this number of sources */
/* The OpenAL implementation should support
at least this number of sources */
#define MIN_CHANNELS 16
qboolean streamPlaying;
/* Globals */
cvar_t *s_openal_maxgain;
int active_buffers;
qboolean streamPlaying;
static ALuint s_srcnums[MAX_CHANNELS - 1];
static ALuint streamSource;
static int s_framecount;
/* Apple crappy OpenAL implementation
has no support for filters. */
#ifndef __APPLE__
static ALuint underwaterFilter;
#endif
static ALuint s_srcnums[MAX_CHANNELS - 1];
static int s_framecount;
cvar_t *s_openal_maxgain;
/* Forward Declarations */
static void S_AL_StreamUpdate(void);
static void S_AL_StreamDie(void);
/* ----------------------------------------------------------------- */
/*
* Silence / stop all OpenAL streams
*/
static void
AL_InitStreamSource()
AL_StreamDie(void)
{
qalSourcei(streamSource, AL_BUFFER, 0);
qalSourcei(streamSource, AL_LOOPING, AL_FALSE);
qalSource3f(streamSource, AL_POSITION, 0.0, 0.0, 0.0);
qalSource3f(streamSource, AL_VELOCITY, 0.0, 0.0, 0.0);
qalSource3f(streamSource, AL_DIRECTION, 0.0, 0.0, 0.0);
qalSourcef(streamSource, AL_ROLLOFF_FACTOR, 0.0);
qalSourcei(streamSource, AL_SOURCE_RELATIVE, AL_TRUE);
}
int numBuffers;
streamPlaying = false;
qalSourceStop(streamSource);
/* Un-queue any buffers, and delete them */
qalGetSourcei(streamSource, AL_BUFFERS_QUEUED, &numBuffers);
while (numBuffers--)
{
ALuint buffer;
qalSourceUnqueueBuffers(streamSource, 1, &buffer);
qalDeleteBuffers(1, &buffer);
active_buffers--;
}
}
/*
* Updates stream sources by removing all played
* buffers and restarting playback if necessary.
*/
static void
AL_InitUnderwaterFilter()
AL_StreamUpdate(void)
{
#if defined (__APPLE__)
return;
#else
/* Generate a filter */
qalGenFilters(1, &underwaterFilter);
int numBuffers;
ALint state;
if (qalGetError() != AL_NO_ERROR)
/* Un-queue any buffers, and delete them */
qalGetSourcei(streamSource, AL_BUFFERS_PROCESSED, &numBuffers);
while (numBuffers--)
{
Com_Printf("Couldn't generate an OpenAL filter!\n");
return;
ALuint buffer;
qalSourceUnqueueBuffers(streamSource, 1, &buffer);
qalDeleteBuffers(1, &buffer);
active_buffers--;
}
/* Low pass filter for underwater effect */
qalFilteri(underwaterFilter, AL_FILTER_TYPE, AL_FILTER_LOWPASS);
/* Start the streamSource playing if necessary */
qalGetSourcei(streamSource, AL_BUFFERS_QUEUED, &numBuffers);
qalGetSourcei(streamSource, AL_SOURCE_STATE, &state);
if (qalGetError() != AL_NO_ERROR)
if (state == AL_STOPPED)
{
Com_Printf("Low pass filter is not supported!\n");
return;
streamPlaying = false;
}
/* The effect */
qalFilterf(underwaterFilter, AL_LOWPASS_GAIN, 1.5);
qalFilterf(underwaterFilter, AL_LOWPASS_GAINHF, 0.25);
#endif
}
qboolean
AL_Init(void)
{
int i;
if (!QAL_Init())
{
Com_Printf("ERROR: OpenAL failed to initialize.\n");
return false;
}
s_openal_maxgain = Cvar_Get("s_openal_maxgain", "1.0", CVAR_ARCHIVE);
/* check for linear distance extension */
if (!qalIsExtensionPresent("AL_EXT_LINEAR_DISTANCE"))
{
Com_Printf("ERROR: Required AL_EXT_LINEAR_DISTANCE extension is missing.\n");
goto fail;
}
/* generate source names */
qalGetError();
qalGenSources(1, &streamSource);
if (qalGetError() != AL_NO_ERROR)
{
Com_Printf("ERROR: Couldn't get a single Source.\n");
goto fail;
}
else
{
/* -1 because we already got one channel for streaming */
for (i = 0; i < MAX_CHANNELS - 1; i++)
{
qalGenSources(1, &s_srcnums[i]);
if (qalGetError() != AL_NO_ERROR)
{
break;
}
}
if (i < MIN_CHANNELS - 1)
{
Com_Printf("ERROR: Required at least %d sources, but got %d.\n",
MIN_CHANNELS, i + 1);
goto fail;
}
}
s_numchannels = i;
AL_InitStreamSource();
AL_InitUnderwaterFilter();
Com_Printf("Number of OpenAL sources: %d\n\n", s_numchannels);
return true;
fail:
QAL_Shutdown();
return false;
}
void
AL_Shutdown(void)
{
Com_Printf("Shutting down OpenAL.\n");
S_AL_StreamDie();
qalDeleteSources(1, &streamSource);
#if !defined (__APPLE__)
qalDeleteFilters(1, &underwaterFilter);
#endif
if (s_numchannels)
{
/* delete source names */
qalDeleteSources(s_numchannels, s_srcnums);
memset(s_srcnums, 0, sizeof(s_srcnums));
s_numchannels = 0;
}
QAL_Shutdown();
if (!streamPlaying && numBuffers)
{
qalSourcePlay(streamSource);
streamPlaying = true;
}
}
/* ----------------------------------------------------------------- */
/*
* Uploads a sample to OpenAL and places
* a dummy entry in the frontends cache.
* This is not nice but necessary for the
* frontend to work.
*/
sfxcache_t *
AL_UploadSfx(sfx_t *s, wavinfo_t *s_info, byte *data)
{
sfxcache_t *sc;
ALsizei size = s_info->samples * s_info->width;
ALenum format = s_info->width == 2 ? AL_FORMAT_MONO16 : AL_FORMAT_MONO8;
ALuint name;
ALsizei size;
ALenum format;
ALuint name;
size = s_info->samples * s_info->width;
format = s_info->width == 2 ? AL_FORMAT_MONO16 : AL_FORMAT_MONO8;
if (!size)
{
@ -213,7 +155,7 @@ AL_UploadSfx(sfx_t *s, wavinfo_t *s_info, byte *data)
/* allocate placeholder sfxcache */
sc = s->cache = Z_TagMalloc(sizeof(*sc), 0);
sc->length = s_info->samples * 1000 / s_info->rate; /* in msec */
sc->length = s_info->samples * 1000 / s_info->rate;
sc->loopstart = s_info->loopstart;
sc->width = s_info->width;
sc->size = size;
@ -222,6 +164,11 @@ AL_UploadSfx(sfx_t *s, wavinfo_t *s_info, byte *data)
return sc;
}
/*
* Deletes a sample from OpenALs internal
* cache. The dummy entry in the frontends
* cache is deleted by the frontend.
*/
void
AL_DeleteSfx(sfx_t *s)
{
@ -240,20 +187,13 @@ AL_DeleteSfx(sfx_t *s)
active_buffers--;
}
void
AL_StopChannel(channel_t *ch)
{
if (s_show->value > 1)
{
Com_Printf("%s: %s\n", __func__, ch->sfx->name);
}
/* stop it */
qalSourceStop(ch->srcnum);
qalSourcei(ch->srcnum, AL_BUFFER, AL_NONE);
memset(ch, 0, sizeof(*ch));
}
/* ----------------------------------------------------------------- */
/*
* Performance stereo spatialization
* of a channel in the frontends
* sense.
*/
static void
AL_Spatialize(channel_t *ch)
{
@ -279,17 +219,24 @@ AL_Spatialize(channel_t *ch)
qalSource3f(ch->srcnum, AL_POSITION, AL_UnpackVector(origin));
}
/*
* Plays a channel (in the frontends
* sense) with OpenAL.
*/
void
AL_PlayChannel(channel_t *ch)
{
sfxcache_t *sc = ch->sfx->cache;
sfxcache_t *sc;
/* Debug */
if (s_show->value > 1)
{
Com_Printf("%s: %s\n", __func__, ch->sfx->name);
}
sc = ch->sfx->cache;
ch->srcnum = s_srcnums[ch - channels];
qalGetError();
qalSourcei(ch->srcnum, AL_BUFFER, sc->bufnum);
qalSourcei(ch->srcnum, AL_LOOPING, ch->autosound ? AL_TRUE : AL_FALSE);
@ -299,17 +246,41 @@ AL_PlayChannel(channel_t *ch)
qalSourcef(ch->srcnum, AL_MAX_DISTANCE, 8192);
qalSourcef(ch->srcnum, AL_ROLLOFF_FACTOR, ch->dist_mult * (8192 - SOUND_FULLVOLUME));
/* Spatialize it */
AL_Spatialize(ch);
/* play it */
/* Play it */
qalSourcePlay(ch->srcnum);
/* Do not play broken channels */
if (qalGetError() != AL_NO_ERROR)
{
AL_StopChannel(ch);
}
}
/*
* Stops playback of a "channel"
* in the frontends sense.
*/
void
AL_StopChannel(channel_t *ch)
{
/* Debug output */
if (s_show->value > 1)
{
Com_Printf("%s: %s\n", __func__, ch->sfx->name);
}
/* stop it */
qalSourceStop(ch->srcnum);
qalSourcei(ch->srcnum, AL_BUFFER, AL_NONE);
memset(ch, 0, sizeof(*ch));
}
/*
* Stops playback of all channels.
*/
void
AL_StopAllChannels(void)
{
@ -318,6 +289,8 @@ AL_StopAllChannels(void)
ch = channels;
/* It doesn't matter if a channel
is active or not. */
for (i = 0; i < s_numchannels; i++, ch++)
{
if (!ch->sfx)
@ -329,9 +302,18 @@ AL_StopAllChannels(void)
}
s_rawend = 0;
S_AL_StreamDie();
/* Remove all pending samples */
AL_StreamDie();
}
/* ----------------------------------------------------------------- */
/*
* Returns the channel which contains
* the looping sound for the entity
* "entnum".
*/
static channel_t *
AL_FindLoopingSound(int entnum, sfx_t *sfx)
{
@ -368,6 +350,9 @@ AL_FindLoopingSound(int entnum, sfx_t *sfx)
return NULL;
}
/*
* Plays an looping sound with OpenAL
*/
static void
AL_AddLoopSounds(void)
{
@ -439,6 +424,9 @@ AL_AddLoopSounds(void)
}
}
/*
* Starts all pending playsounds.
*/
static void
AL_IssuePlaysounds(void)
{
@ -462,7 +450,74 @@ AL_IssuePlaysounds(void)
S_IssuePlaysound(ps);
}
}
/*
* Queues raw samples for playback. Used
* by the background music an cinematics.
*/
void
AL_RawSamples(int samples, int rate, int width, int channels,
byte *data, float volume)
{
ALuint buffer;
ALuint format = 0;
/* Work out format */
if (width == 1)
{
if (channels == 1)
{
format = AL_FORMAT_MONO8;
}
else if (channels == 2)
{
format = AL_FORMAT_STEREO8;
}
}
else if (width == 2)
{
if (channels == 1)
{
format = AL_FORMAT_MONO16;
}
else if (channels == 2)
{
format = AL_FORMAT_STEREO16;
}
}
/* Create a buffer, and stuff the data into it */
qalGenBuffers(1, &buffer);
qalBufferData(buffer, format, (ALvoid *)data,
(samples * width * channels), rate);
active_buffers++;
/* set volume */
qalSourcef(streamSource, AL_GAIN, volume);
qalSourcef(streamSource, AL_MAX_GAIN, s_openal_maxgain->value);
/* Shove the data onto the streamSource */
qalSourceQueueBuffers(streamSource, 1, &buffer);
/* emulate behavior of S_RawSamples for s_rawend */
s_rawend += samples;
}
/*
* Kills all raw samples still in flight.
* This is used to stop music playback
* when silence is triggered.
*/
void
AL_UnqueueRawSamples()
{
AL_StreamDie();
}
/*
* Main update function. Called every frame,
* performes all necessary calculations.
*/
void
AL_Update(void)
{
@ -472,7 +527,7 @@ AL_Update(void)
paintedtime = cl.time;
/* set listener parameters */
/* set listener (player) parameters */
qalListener3f(AL_POSITION, AL_UnpackVector(listener_origin));
AL_CopyVector(listener_forward, orientation);
AL_CopyVector(listener_up, orientation + 3);
@ -517,7 +572,8 @@ AL_Update(void)
Com_Printf("%3i %s\n", ch->master_vol, ch->sfx->name);
}
AL_Spatialize(ch); /* respatialize channel */
/* respatialize channel */
AL_Spatialize(ch);
}
s_framecount++;
@ -526,15 +582,23 @@ AL_Update(void)
AL_AddLoopSounds();
/* add music */
#ifdef OGG
OGG_Stream();
S_AL_StreamUpdate();
#endif
AL_StreamUpdate();
AL_IssuePlaysounds();
}
/* ----------------------------------------------------------------- */
/*
* Enables underwater effect
*/
void
AL_Underwater()
{
#if !defined (__APPLE__)
int i;
if (sound_started != SS_OAL)
@ -545,15 +609,18 @@ AL_Underwater()
/* Apply to all sources */
for (i = 0; i < s_numchannels; i++)
{
#if !defined (__APPLE__)
qalSourcei(s_srcnums[i], AL_DIRECT_FILTER, underwaterFilter);
#endif
}
#endif
}
/*
* Disables the underwater effect
*/
void
AL_Overwater()
{
#if !defined (__APPLE__)
int i;
if (sound_started != SS_OAL)
@ -564,128 +631,148 @@ AL_Overwater()
/* Apply to all sources */
for (i = 0; i < s_numchannels; i++)
{
#if !defined (__APPLE__)
qalSourcei(s_srcnums[i], AL_DIRECT_FILTER, 0);
}
#endif
}
}
/* ----------------------------------------------------------------- */
/*
* Set up the stream sources
*/
static void
S_AL_StreamDie(void)
AL_InitStreamSource()
{
int numBuffers;
streamPlaying = false;
qalSourceStop(streamSource);
/* Un-queue any buffers, and delete them */
qalGetSourcei(streamSource, AL_BUFFERS_QUEUED, &numBuffers);
while (numBuffers--)
{
ALuint buffer;
qalSourceUnqueueBuffers(streamSource, 1, &buffer);
qalDeleteBuffers(1, &buffer);
active_buffers--;
}
qalSource3f(streamSource, AL_POSITION, 0.0, 0.0, 0.0);
qalSource3f(streamSource, AL_VELOCITY, 0.0, 0.0, 0.0);
qalSource3f(streamSource, AL_DIRECTION, 0.0, 0.0, 0.0);
qalSourcef(streamSource, AL_ROLLOFF_FACTOR, 0.0);
qalSourcei(streamSource, AL_BUFFER, 0);
qalSourcei(streamSource, AL_LOOPING, AL_FALSE);
qalSourcei(streamSource, AL_SOURCE_RELATIVE, AL_TRUE);
}
/*
* Set up the underwater filter
*/
static void
S_AL_StreamUpdate(void)
AL_InitUnderwaterFilter()
{
int numBuffers;
ALint state;
/* Generate a filter */
qalGenFilters(1, &underwaterFilter);
/* Un-queue any buffers, and delete them */
qalGetSourcei(streamSource, AL_BUFFERS_PROCESSED, &numBuffers);
while (numBuffers--)
if (qalGetError() != AL_NO_ERROR)
{
ALuint buffer;
qalSourceUnqueueBuffers(streamSource, 1, &buffer);
qalDeleteBuffers(1, &buffer);
active_buffers--;
Com_Printf("Couldn't generate an OpenAL filter!\n");
return;
}
/* Start the streamSource playing if necessary */
qalGetSourcei(streamSource, AL_BUFFERS_QUEUED, &numBuffers);
/* Low pass filter for underwater effect */
qalFilteri(underwaterFilter, AL_FILTER_TYPE, AL_FILTER_LOWPASS);
qalGetSourcei(streamSource, AL_SOURCE_STATE, &state);
if (state == AL_STOPPED)
if (qalGetError() != AL_NO_ERROR)
{
streamPlaying = false;
Com_Printf("Low pass filter is not supported!\n");
return;
}
if (!streamPlaying && numBuffers)
{
qalSourcePlay(streamSource);
streamPlaying = true;
}
/* The effect */
qalFilterf(underwaterFilter, AL_LOWPASS_GAIN, 1.5);
qalFilterf(underwaterFilter, AL_LOWPASS_GAINHF, 0.25);
}
static ALuint
S_AL_Format(int width, int channels)
/*
* Initializes the OpenAL backend
*/
qboolean
AL_Init(void)
{
ALuint format = AL_FORMAT_MONO16;
int i;
/* Work out format */
if (width == 1)
if (!QAL_Init())
{
if (channels == 1)
{
format = AL_FORMAT_MONO8;
}
else if (channels == 2)
{
format = AL_FORMAT_STEREO8;
}
Com_Printf("ERROR: OpenAL failed to initialize.\n");
return false;
}
else if (width == 2)
s_openal_maxgain = Cvar_Get("s_openal_maxgain", "1.0", CVAR_ARCHIVE);
/* check for linear distance extension */
if (!qalIsExtensionPresent("AL_EXT_LINEAR_DISTANCE"))
{
if (channels == 1)
Com_Printf("ERROR: Required AL_EXT_LINEAR_DISTANCE extension is missing.\n");
QAL_Shutdown();
return false;
}
/* generate source names */
qalGetError();
qalGenSources(1, &streamSource);
if (qalGetError() != AL_NO_ERROR)
{
Com_Printf("ERROR: Couldn't get a single Source.\n");
QAL_Shutdown();
return false;
}
else
{
/* -1 because we already got one channel for streaming */
for (i = 0; i < MAX_CHANNELS - 1; i++)
{
format = AL_FORMAT_MONO16;
qalGenSources(1, &s_srcnums[i]);
if (qalGetError() != AL_NO_ERROR)
{
break;
}
}
else if (channels == 2)
if (i < MIN_CHANNELS - 1)
{
format = AL_FORMAT_STEREO16;
Com_Printf("ERROR: Required at least %d sources, but got %d.\n",
MIN_CHANNELS, i + 1);
QAL_Shutdown();
return false;
}
}
return format;
s_numchannels = i;
AL_InitStreamSource();
#ifndef __APPLE__
AL_InitUnderwaterFilter();
#endif
Com_Printf("Number of OpenAL sources: %d\n\n", s_numchannels);
return true;
}
/*
* Shuts the OpenAL backend down
*/
void
AL_RawSamples(int samples, int rate, int width, int channels,
byte *data, float volume)
AL_Shutdown(void)
{
ALuint buffer;
ALuint format;
Com_Printf("Shutting down OpenAL.\n");
format = S_AL_Format(width, channels);
AL_StreamDie();
/* Create a buffer, and stuff the data into it */
qalGenBuffers(1, &buffer);
qalBufferData(buffer, format, (ALvoid *)data,
(samples * width * channels), rate);
active_buffers++;
qalDeleteSources(1, &streamSource);
#if !defined (__APPLE__)
qalDeleteFilters(1, &underwaterFilter);
#endif
if (s_numchannels)
{
/* delete source names */
qalDeleteSources(s_numchannels, s_srcnums);
memset(s_srcnums, 0, sizeof(s_srcnums));
s_numchannels = 0;
}
/* set volume */
qalSourcef(streamSource, AL_GAIN, volume);
qalSourcef(streamSource, AL_MAX_GAIN, s_openal_maxgain->value);
/* Shove the data onto the streamSource */
qalSourceQueueBuffers(streamSource, 1, &buffer);
/* emulate behavior of S_RawSamples for s_rawend */
s_rawend += samples;
}
void
AL_UnqueueRawSamples()
{
S_AL_StreamDie();
QAL_Shutdown();
}
#endif /* USE_OPENAL */