diff options
Diffstat (limited to 'Source/external/SDL2/src/audio/fusionsound/SDL_fsaudio.c')
| -rw-r--r-- | Source/external/SDL2/src/audio/fusionsound/SDL_fsaudio.c | 328 |
1 files changed, 328 insertions, 0 deletions
diff --git a/Source/external/SDL2/src/audio/fusionsound/SDL_fsaudio.c b/Source/external/SDL2/src/audio/fusionsound/SDL_fsaudio.c new file mode 100644 index 0000000..36fa5c5 --- /dev/null +++ b/Source/external/SDL2/src/audio/fusionsound/SDL_fsaudio.c @@ -0,0 +1,328 @@ +/* + 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: */ |