SDL_fsaudio.c
Go to the documentation of this file.
/*
Simple DirectMedia Layer
Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#if SDL_AUDIO_DRIVER_FUSIONSOUND
/* !!! FIXME: why is this is SDL_FS_* instead of FUSIONSOUND_*? */
/* Allow access to a raw mixing buffer */
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif
#include <unistd.h>
#include "SDL_timer.h"
#include "SDL_audio.h"
#include "../SDL_audio_c.h"
#include "SDL_fsaudio.h"
#include <fusionsound/fusionsound_version.h>
/* #define SDL_AUDIO_DRIVER_FUSIONSOUND_DYNAMIC "libfusionsound.so" */
#ifdef SDL_AUDIO_DRIVER_FUSIONSOUND_DYNAMIC
#include "SDL_name.h"
#include "SDL_loadso.h"
#else
#define SDL_NAME(X) X
#endif
#if (FUSIONSOUND_MAJOR_VERSION == 1) && (FUSIONSOUND_MINOR_VERSION < 1)
typedef DFBResult DirectResult;
#endif
/* Buffers to use - more than 2 gives a lot of latency */
#define FUSION_BUFFERS (2)
#ifdef SDL_AUDIO_DRIVER_FUSIONSOUND_DYNAMIC
static const char *fs_library = SDL_AUDIO_DRIVER_FUSIONSOUND_DYNAMIC;
static void *fs_handle = NULL;
static DirectResult (*SDL_NAME(FusionSoundInit)) (int *argc, char *(*argv[]));
static DirectResult (*SDL_NAME(FusionSoundCreate)) (IFusionSound **
ret_interface);
#define SDL_FS_SYM(x) { #x, (void **) (char *) &SDL_NAME(x) }
static struct
{
const char *name;
void **func;
} fs_functions[] = {
/* *INDENT-OFF* */
SDL_FS_SYM(FusionSoundInit),
SDL_FS_SYM(FusionSoundCreate),
/* *INDENT-ON* */
};
#undef SDL_FS_SYM
static void
UnloadFusionSoundLibrary()
{
if (fs_handle != NULL) {
SDL_UnloadObject(fs_handle);
fs_handle = NULL;
}
}
static int
LoadFusionSoundLibrary(void)
{
int i, retval = -1;
if (fs_handle == NULL) {
fs_handle = SDL_LoadObject(fs_library);
if (fs_handle != NULL) {
retval = 0;
for (i = 0; i < SDL_arraysize(fs_functions); ++i) {
*fs_functions[i].func =
SDL_LoadFunction(fs_handle, fs_functions[i].name);
if (!*fs_functions[i].func) {
retval = -1;
UnloadFusionSoundLibrary();
break;
}
}
}
}
return retval;
}
#else
static void
UnloadFusionSoundLibrary()
{
return;
}
static int
LoadFusionSoundLibrary(void)
{
return 0;
}
#endif /* SDL_AUDIO_DRIVER_FUSIONSOUND_DYNAMIC */
/* This function waits until it is possible to write a full sound buffer */
static void
SDL_FS_WaitDevice(_THIS)
{
this->hidden->stream->Wait(this->hidden->stream,
this->hidden->mixsamples);
}
static void
SDL_FS_PlayDevice(_THIS)
{
DirectResult ret;
ret = this->hidden->stream->Write(this->hidden->stream,
this->hidden->mixbuf,
this->hidden->mixsamples);
/* If we couldn't write, assume fatal error for now */
if (ret) {
SDL_OpenedAudioDeviceDisconnected(this);
}
#ifdef DEBUG_AUDIO
fprintf(stderr, "Wrote %d bytes of audio data\n", this->hidden->mixlen);
#endif
}
static Uint8 *
SDL_FS_GetDeviceBuf(_THIS)
{
return (this->hidden->mixbuf);
}
static void
SDL_FS_CloseDevice(_THIS)
{
if (this->hidden->stream) {
this->hidden->stream->Release(this->hidden->stream);
}
if (this->hidden->fs) {
this->hidden->fs->Release(this->hidden->fs);
}
SDL_free(this->hidden->mixbuf);
SDL_free(this->hidden);
}
static int
SDL_FS_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
{
int bytes;
SDL_AudioFormat test_format = 0, format = 0;
FSSampleFormat fs_format;
FSStreamDescription desc;
DirectResult ret;
/* Initialize all variables that we clean on shutdown */
this->hidden = (struct SDL_PrivateAudioData *)
SDL_malloc((sizeof *this->hidden));
if (this->hidden == NULL) {
return SDL_OutOfMemory();
}
SDL_zerop(this->hidden);
/* Try for a closest match on audio format */
for (test_format = SDL_FirstAudioFormat(this->spec.format);
!format && test_format;) {
#ifdef DEBUG_AUDIO
fprintf(stderr, "Trying format 0x%4.4x\n", test_format);
#endif
switch (test_format) {
case AUDIO_U8:
fs_format = FSSF_U8;
bytes = 1;
format = 1;
break;
case AUDIO_S16SYS:
fs_format = FSSF_S16;
bytes = 2;
format = 1;
break;
case AUDIO_S32SYS:
fs_format = FSSF_S32;
bytes = 4;
format = 1;
break;
case AUDIO_F32SYS:
fs_format = FSSF_FLOAT;
bytes = 4;
format = 1;
break;
default:
format = 0;
break;
}
if (!format) {
test_format = SDL_NextAudioFormat();
}
}
if (format == 0) {
return SDL_SetError("Couldn't find any hardware audio formats");
}
this->spec.format = test_format;
/* Retrieve the main sound interface. */
ret = SDL_NAME(FusionSoundCreate) (&this->hidden->fs);
if (ret) {
return SDL_SetError("Unable to initialize FusionSound: %d", ret);
}
this->hidden->mixsamples = this->spec.size / bytes / this->spec.channels;
/* Fill stream description. */
desc.flags = FSSDF_SAMPLERATE | FSSDF_BUFFERSIZE |
FSSDF_CHANNELS | FSSDF_SAMPLEFORMAT | FSSDF_PREBUFFER;
desc.samplerate = this->spec.freq;
desc.buffersize = this->spec.size * FUSION_BUFFERS;
desc.channels = this->spec.channels;
desc.prebuffer = 10;
desc.sampleformat = fs_format;
ret =
this->hidden->fs->CreateStream(this->hidden->fs, &desc,
&this->hidden->stream);
if (ret) {
return SDL_SetError("Unable to create FusionSoundStream: %d", ret);
}
/* See what we got */
desc.flags = FSSDF_SAMPLERATE | FSSDF_BUFFERSIZE |
FSSDF_CHANNELS | FSSDF_SAMPLEFORMAT;
ret = this->hidden->stream->GetDescription(this->hidden->stream, &desc);
this->spec.freq = desc.samplerate;
this->spec.size =
desc.buffersize / FUSION_BUFFERS * bytes * desc.channels;
this->spec.channels = desc.channels;
/* Calculate the final parameters for this audio specification */
SDL_CalculateAudioSpec(&this->spec);
/* Allocate mixing buffer */
this->hidden->mixlen = this->spec.size;
this->hidden->mixbuf = (Uint8 *) SDL_malloc(this->hidden->mixlen);
if (this->hidden->mixbuf == NULL) {
return SDL_OutOfMemory();
}
SDL_memset(this->hidden->mixbuf, this->spec.silence, this->spec.size);
/* We're ready to rock and roll. :-) */
return 0;
}
static void
SDL_FS_Deinitialize(void)
{
UnloadFusionSoundLibrary();
}
static int
SDL_FS_Init(SDL_AudioDriverImpl * impl)
{
if (LoadFusionSoundLibrary() < 0) {
return 0;
} else {
DirectResult ret;
ret = SDL_NAME(FusionSoundInit) (NULL, NULL);
if (ret) {
UnloadFusionSoundLibrary();
SDL_SetError
("FusionSound: SDL_FS_init failed (FusionSoundInit: %d)",
ret);
return 0;
}
}
/* Set the function pointers */
impl->OpenDevice = SDL_FS_OpenDevice;
impl->PlayDevice = SDL_FS_PlayDevice;
impl->WaitDevice = SDL_FS_WaitDevice;
impl->GetDeviceBuf = SDL_FS_GetDeviceBuf;
impl->CloseDevice = SDL_FS_CloseDevice;
impl->Deinitialize = SDL_FS_Deinitialize;
impl->OnlyHasDefaultOutputDevice = 1;
return 1; /* this audio target is available. */
}
AudioBootStrap FUSIONSOUND_bootstrap = {
"fusionsound", "FusionSound", SDL_FS_Init, 0
};
#endif /* SDL_AUDIO_DRIVER_FUSIONSOUND */
/* vi: set ts=4 sw=4 expandtab: */
SDL_fsaudio.h
SDL_FirstAudioFormat
SDL_AudioFormat SDL_FirstAudioFormat(SDL_AudioFormat format)
Definition: SDL_audio.c:1584
SDL_name.h
SDL_AudioDriverImpl::PlayDevice
void(* PlayDevice)(_THIS)
Definition: SDL_sysaudio.h:73
SDL_AudioDriverImpl::WaitDevice
void(* WaitDevice)(_THIS)
Definition: SDL_sysaudio.h:72
SDL_OpenedAudioDeviceDisconnected
void SDL_OpenedAudioDeviceDisconnected(SDL_AudioDevice *device)
Definition: SDL_audio.c:449
SDL_AudioFormat
Uint16 SDL_AudioFormat
Audio format flags.
Definition: SDL_audio.h:64
SDL_LoadObject
#define SDL_LoadObject
Definition: SDL_dynapi_overrides.h:232
AUDIO_S16SYS
#define AUDIO_S16SYS
Definition: SDL_audio.h:123
SDL_UnloadObject
#define SDL_UnloadObject
Definition: SDL_dynapi_overrides.h:234
SDL_zerop
#define SDL_zerop(x)
Definition: SDL_stdinc.h:417
SDL_PrivateAudioData
Definition: SDL_alsa_audio.h:33
SDL_NextAudioFormat
SDL_AudioFormat SDL_NextAudioFormat(void)
Definition: SDL_audio.c:1596
name
GLuint const GLchar * name
Definition: SDL_opengl_glext.h:660
format
GLint GLint GLsizei GLsizei GLsizei GLint GLenum format
Definition: SDL_opengl.h:1572
spec
SDL_AudioSpec spec
Definition: loopwave.c:31
retval
SDL_bool retval
Definition: testgamecontroller.c:65
AUDIO_U8
#define AUDIO_U8
Definition: SDL_audio.h:89
AudioBootStrap
Definition: SDL_sysaudio.h:175
SDL_AudioDriverImpl::OnlyHasDefaultOutputDevice
int OnlyHasDefaultOutputDevice
Definition: SDL_sysaudio.h:92
SDL_AudioSpec::freq
int freq
Definition: SDL_audio.h:179
handle
EGLImageKHR EGLint EGLint * handle
Definition: eglext.h:937
AUDIO_F32SYS
#define AUDIO_F32SYS
Definition: SDL_audio.h:125
FUSIONSOUND_bootstrap
AudioBootStrap FUSIONSOUND_bootstrap
SDL_AudioSpec::channels
Uint8 channels
Definition: SDL_audio.h:181
_THIS
#define _THIS
Definition: SDL_alsa_audio.h:31
Uint8
uint8_t Uint8
Definition: SDL_stdinc.h:157
SDL_free
#define SDL_free
Definition: SDL_dynapi_overrides.h:377
SDL_AudioDriverImpl
Definition: SDL_sysaudio.h:65
SDL_AudioDriverImpl::Deinitialize
void(* Deinitialize)(void)
Definition: SDL_sysaudio.h:83
SDL_CalculateAudioSpec
void SDL_CalculateAudioSpec(SDL_AudioSpec *spec)
Definition: SDL_audio.c:1605
i
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:50
SDL_AudioSpec::size
Uint32 size
Definition: SDL_audio.h:185
SDL_AudioDriverImpl::OpenDevice
int(* OpenDevice)(_THIS, void *handle, const char *devname, int iscapture)
Definition: SDL_sysaudio.h:68
NULL
#define NULL
Definition: begin_code.h:164
SDL_OutOfMemory
#define SDL_OutOfMemory()
Definition: SDL_error.h:52
SDL_NAME
#define SDL_NAME(X)
Definition: SDL_name.h:29
SDL_SetError
#define SDL_SetError
Definition: SDL_dynapi_overrides.h:30
SDL_loadso.h
SDL_AudioDriverImpl::CloseDevice
void(* CloseDevice)(_THIS)
Definition: SDL_sysaudio.h:79
func
GLenum func
Definition: SDL_opengl_glext.h:657
SDL_audio.h
SDL_AudioSpec::format
SDL_AudioFormat format
Definition: SDL_audio.h:180
SDL_AudioDriverImpl::GetDeviceBuf
Uint8 *(* GetDeviceBuf)(_THIS)
Definition: SDL_sysaudio.h:75
AUDIO_S32SYS
#define AUDIO_S32SYS
Definition: SDL_audio.h:124
SDL_arraysize
#define SDL_arraysize(array)
Definition: SDL_stdinc.h:93
SDL_malloc
#define SDL_malloc
Definition: SDL_dynapi_overrides.h:374
SDL_LoadFunction
void * SDL_LoadFunction(void *handle, const char *name)
SDL_timer.h
SDL_memset
#define SDL_memset
Definition: SDL_dynapi_overrides.h:386