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Location: alysbrooks-public/games/isometric-park-fna/FNA/lib/FAudio/src/FAudio_platform_sdl2.c - annotation

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Commit Description:
Various UI improvements.
Commit Description:
Various UI improvements.
References:
r291:6a7d5e8510b1 default
File last commit:
r0:e33f209de7e5 default
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FNA/lib/FAudio/src/FAudio_platform_sdl2.c
544 lines | 14.7 KiB | text/x-c | CLexer
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alys
Early working version (including all dependencies, lol).
 r0 /* FAudio - XAudio Reimplementation for FNA
*
* Copyright (c) 2011-2020 Ethan Lee, Luigi Auriemma, and the MonoGame Team
*
* 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.
*
* Ethan "flibitijibibo" Lee <flibitijibibo@flibitijibibo.com>
*
*/
#include "FAudio_internal.h"
#include <SDL.h>
/* Mixer Thread */
static void FAudio_INTERNAL_MixCallback(void *userdata, Uint8 *stream, int len)
{
FAudio *audio = (FAudio*) userdata;
FAudio_zero(stream, len);
if (audio->active)
{
FAudio_INTERNAL_UpdateEngine(
audio,
(float*) stream
);
}
}
/* Platform Functions */
void FAudio_PlatformAddRef()
{
/* SDL tracks ref counts for each subsystem */
if (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0)
{
SDL_Log("SDL_INIT_AUDIO failed: %s", SDL_GetError());
}
FAudio_INTERNAL_InitSIMDFunctions(
SDL_HasSSE2(),
SDL_HasNEON()
);
}
void FAudio_PlatformRelease()
{
/* SDL tracks ref counts for each subsystem */
SDL_QuitSubSystem(SDL_INIT_AUDIO);
}
void FAudio_PlatformInit(
FAudio *audio,
uint32_t flags,
uint32_t deviceIndex,
FAudioWaveFormatExtensible *mixFormat,
uint32_t *updateSize,
void** platformDevice
) {
SDL_AudioDeviceID device;
SDL_AudioSpec want, have;
FAudio_assert(mixFormat != NULL);
FAudio_assert(updateSize != NULL);
/* Build the device spec */
want.freq = mixFormat->Format.nSamplesPerSec;
want.format = AUDIO_F32;
want.channels = mixFormat->Format.nChannels;
want.silence = 0;
want.callback = FAudio_INTERNAL_MixCallback;
want.userdata = audio;
if (flags & FAUDIO_1024_QUANTUM)
{
/* Get the sample count for a 21.33ms frame.
* For 48KHz this should be 1024.
*/
want.samples = (int) (
want.freq / (1000.0 / (64.0 / 3.0))
);
}
else
{
want.samples = want.freq / 100;
}
/* Open the device (or at least try to) */
iosretry:
device = SDL_OpenAudioDevice(
deviceIndex > 0 ? SDL_GetAudioDeviceName(deviceIndex - 1, 0) : NULL,
0,
&want,
&have,
0
);
if (device == 0)
{
const char *err = SDL_GetError();
SDL_Log("OpenAudioDevice failed: %s", err);
/* iOS has a weird thing where you can't open a stream when the
* app is in the background, even though the program is meant
* to be suspended and thus not trip this in the first place.
*
* Startup suspend behavior when an app is opened then closed
* is a big pile of crap, basically.
*
* Google the error code and you'll find that this has been a
* long-standing issue that nobody seems to care about.
* -flibit
*/
if (SDL_strstr(err, "Code=561015905") != NULL)
{
goto iosretry;
}
FAudio_assert(0 && "Failed to open audio device!");
return;
}
/* Write up the received format for the engine */
WriteWaveFormatExtensible(mixFormat, have.channels, have.freq);
*updateSize = have.samples;
/* SDL_AudioDeviceID is a Uint32, anybody using a 16-bit PC still? */
*platformDevice = (void*) ((size_t) device);
/* Start the thread! */
SDL_PauseAudioDevice(device, 0);
}
void FAudio_PlatformQuit(void* platformDevice)
{
SDL_CloseAudioDevice((SDL_AudioDeviceID) ((size_t) platformDevice));
}
uint32_t FAudio_PlatformGetDeviceCount()
{
uint32_t devCount = SDL_GetNumAudioDevices(0);
if (devCount == 0)
{
return 0;
}
return devCount + 1; /* Add one for "Default Device" */
}
void FAudio_UTF8_To_UTF16(const char *src, uint16_t *dst, size_t len);
uint32_t FAudio_PlatformGetDeviceDetails(
uint32_t index,
FAudioDeviceDetails *details
) {
const char *name, *envvar;
int channels, rate;
FAudio_zero(details, sizeof(FAudioDeviceDetails));
if (index >= FAudio_PlatformGetDeviceCount())
{
return FAUDIO_E_INVALID_CALL;
}
details->DeviceID[0] = L'0' + index;
if (index == 0)
{
name = "Default Device";
details->Role = FAudioGlobalDefaultDevice;
/* This variable will look like a DSound GUID or WASAPI ID, i.e.
* "{0.0.0.00000000}.{FD47D9CC-4218-4135-9CE2-0C195C87405B}"
*/
envvar = SDL_getenv("FAUDIO_FORCE_DEFAULT_DEVICEID");
if (envvar != NULL)
{
FAudio_UTF8_To_UTF16(
envvar,
(uint16_t*) details->DeviceID,
sizeof(details->DeviceID)
);
}
}
else
{
name = SDL_GetAudioDeviceName(index - 1, 0);
details->Role = FAudioNotDefaultDevice;
}
FAudio_UTF8_To_UTF16(
name,
(uint16_t*) details->DisplayName,
sizeof(details->DisplayName)
);
/* TODO: SDL_GetAudioDeviceSpec! */
envvar = SDL_getenv("SDL_AUDIO_FREQUENCY");
if (!envvar || ((rate = SDL_atoi(envvar)) == 0))
{
rate = 48000;
}
envvar = SDL_getenv("SDL_AUDIO_CHANNELS");
if (!envvar || ((channels = SDL_atoi(envvar)) == 0))
{
channels = 2;
}
WriteWaveFormatExtensible(&details->OutputFormat, channels, rate);
return 0;
}
/* Threading */
FAudioThread FAudio_PlatformCreateThread(
FAudioThreadFunc func,
const char *name,
void* data
) {
return (FAudioThread) SDL_CreateThread(
(SDL_ThreadFunction) func,
name,
data
);
}
void FAudio_PlatformWaitThread(FAudioThread thread, int32_t *retval)
{
SDL_WaitThread((SDL_Thread*) thread, retval);
}
void FAudio_PlatformThreadPriority(FAudioThreadPriority priority)
{
SDL_SetThreadPriority((SDL_ThreadPriority) priority);
}
uint64_t FAudio_PlatformGetThreadID(void)
{
return (uint64_t) SDL_ThreadID();
}
FAudioMutex FAudio_PlatformCreateMutex()
{
return (FAudioMutex) SDL_CreateMutex();
}
void FAudio_PlatformDestroyMutex(FAudioMutex mutex)
{
SDL_DestroyMutex((SDL_mutex*) mutex);
}
void FAudio_PlatformLockMutex(FAudioMutex mutex)
{
SDL_LockMutex((SDL_mutex*) mutex);
}
void FAudio_PlatformUnlockMutex(FAudioMutex mutex)
{
SDL_UnlockMutex((SDL_mutex*) mutex);
}
void FAudio_sleep(uint32_t ms)
{
SDL_Delay(ms);
}
/* Time */
uint32_t FAudio_timems()
{
return SDL_GetTicks();
}
/* FAudio I/O */
FAudioIOStream* FAudio_fopen(const char *path)
{
FAudioIOStream *io = (FAudioIOStream*) FAudio_malloc(
sizeof(FAudioIOStream)
);
SDL_RWops *rwops = SDL_RWFromFile(path, "rb");
io->data = rwops;
io->read = (FAudio_readfunc) rwops->read;
io->seek = (FAudio_seekfunc) rwops->seek;
io->close = (FAudio_closefunc) rwops->close;
io->lock = FAudio_PlatformCreateMutex();
return io;
}
FAudioIOStream* FAudio_memopen(void *mem, int len)
{
FAudioIOStream *io = (FAudioIOStream*) FAudio_malloc(
sizeof(FAudioIOStream)
);
SDL_RWops *rwops = SDL_RWFromMem(mem, len);
io->data = rwops;
io->read = (FAudio_readfunc) rwops->read;
io->seek = (FAudio_seekfunc) rwops->seek;
io->close = (FAudio_closefunc) rwops->close;
io->lock = FAudio_PlatformCreateMutex();
return io;
}
uint8_t* FAudio_memptr(FAudioIOStream *io, size_t offset)
{
SDL_RWops *rwops = (SDL_RWops*) io->data;
FAudio_assert(rwops->type == SDL_RWOPS_MEMORY);
return rwops->hidden.mem.base + offset;
}
void FAudio_close(FAudioIOStream *io)
{
io->close(io->data);
FAudio_PlatformDestroyMutex((FAudioMutex) io->lock);
FAudio_free(io);
}
#ifdef FAUDIO_DUMP_VOICES
FAudioIOStreamOut* FAudio_fopen_out(const char *path, const char *mode)
{
FAudioIOStreamOut *io = (FAudioIOStreamOut*) FAudio_malloc(
sizeof(FAudioIOStreamOut)
);
SDL_RWops *rwops = SDL_RWFromFile(path, mode);
io->data = rwops;
io->read = (FAudio_readfunc) rwops->read;
io->write = (FAudio_writefunc) rwops->write;
io->seek = (FAudio_seekfunc) rwops->seek;
io->size = (FAudio_sizefunc) rwops->size;
io->close = (FAudio_closefunc) rwops->close;
io->lock = FAudio_PlatformCreateMutex();
return io;
}
void FAudio_close_out(FAudioIOStreamOut *io)
{
io->close(io->data);
FAudio_PlatformDestroyMutex((FAudioMutex) io->lock);
FAudio_free(io);
}
#endif /* FAUDIO_DUMP_VOICES */
/* UTF8->UTF16 Conversion, taken from PhysicsFS */
#define UNICODE_BOGUS_CHAR_VALUE 0xFFFFFFFF
#define UNICODE_BOGUS_CHAR_CODEPOINT '?'
static uint32_t FAudio_UTF8_CodePoint(const char **_str)
{
const char *str = *_str;
uint32_t retval = 0;
uint32_t octet = (uint32_t) ((uint8_t) *str);
uint32_t octet2, octet3, octet4;
if (octet == 0) /* null terminator, end of string. */
return 0;
else if (octet < 128) /* one octet char: 0 to 127 */
{
(*_str)++; /* skip to next possible start of codepoint. */
return octet;
} /* else if */
else if ((octet > 127) && (octet < 192)) /* bad (starts with 10xxxxxx). */
{
/*
* Apparently each of these is supposed to be flagged as a bogus
* char, instead of just resyncing to the next valid codepoint.
*/
(*_str)++; /* skip to next possible start of codepoint. */
return UNICODE_BOGUS_CHAR_VALUE;
} /* else if */
else if (octet < 224) /* two octets */
{
(*_str)++; /* advance at least one byte in case of an error */
octet -= (128+64);
octet2 = (uint32_t) ((uint8_t) *(++str));
if ((octet2 & (128+64)) != 128) /* Format isn't 10xxxxxx? */
return UNICODE_BOGUS_CHAR_VALUE;
*_str += 1; /* skip to next possible start of codepoint. */
retval = ((octet << 6) | (octet2 - 128));
if ((retval >= 0x80) && (retval <= 0x7FF))
return retval;
} /* else if */
else if (octet < 240) /* three octets */
{
(*_str)++; /* advance at least one byte in case of an error */
octet -= (128+64+32);
octet2 = (uint32_t) ((uint8_t) *(++str));
if ((octet2 & (128+64)) != 128) /* Format isn't 10xxxxxx? */
return UNICODE_BOGUS_CHAR_VALUE;
octet3 = (uint32_t) ((uint8_t) *(++str));
if ((octet3 & (128+64)) != 128) /* Format isn't 10xxxxxx? */
return UNICODE_BOGUS_CHAR_VALUE;
*_str += 2; /* skip to next possible start of codepoint. */
retval = ( ((octet << 12)) | ((octet2-128) << 6) | ((octet3-128)) );
/* There are seven "UTF-16 surrogates" that are illegal in UTF-8. */
switch (retval)
{
case 0xD800:
case 0xDB7F:
case 0xDB80:
case 0xDBFF:
case 0xDC00:
case 0xDF80:
case 0xDFFF:
return UNICODE_BOGUS_CHAR_VALUE;
} /* switch */
/* 0xFFFE and 0xFFFF are illegal, too, so we check them at the edge. */
if ((retval >= 0x800) && (retval <= 0xFFFD))
return retval;
} /* else if */
else if (octet < 248) /* four octets */
{
(*_str)++; /* advance at least one byte in case of an error */
octet -= (128+64+32+16);
octet2 = (uint32_t) ((uint8_t) *(++str));
if ((octet2 & (128+64)) != 128) /* Format isn't 10xxxxxx? */
return UNICODE_BOGUS_CHAR_VALUE;
octet3 = (uint32_t) ((uint8_t) *(++str));
if ((octet3 & (128+64)) != 128) /* Format isn't 10xxxxxx? */
return UNICODE_BOGUS_CHAR_VALUE;
octet4 = (uint32_t) ((uint8_t) *(++str));
if ((octet4 & (128+64)) != 128) /* Format isn't 10xxxxxx? */
return UNICODE_BOGUS_CHAR_VALUE;
*_str += 3; /* skip to next possible start of codepoint. */
retval = ( ((octet << 18)) | ((octet2 - 128) << 12) |
((octet3 - 128) << 6) | ((octet4 - 128)) );
if ((retval >= 0x10000) && (retval <= 0x10FFFF))
return retval;
} /* else if */
/*
* Five and six octet sequences became illegal in rfc3629.
* We throw the codepoint away, but parse them to make sure we move
* ahead the right number of bytes and don't overflow the buffer.
*/
else if (octet < 252) /* five octets */
{
(*_str)++; /* advance at least one byte in case of an error */
octet = (uint32_t) ((uint8_t) *(++str));
if ((octet & (128+64)) != 128) /* Format isn't 10xxxxxx? */
return UNICODE_BOGUS_CHAR_VALUE;
octet = (uint32_t) ((uint8_t) *(++str));
if ((octet & (128+64)) != 128) /* Format isn't 10xxxxxx? */
return UNICODE_BOGUS_CHAR_VALUE;
octet = (uint32_t) ((uint8_t) *(++str));
if ((octet & (128+64)) != 128) /* Format isn't 10xxxxxx? */
return UNICODE_BOGUS_CHAR_VALUE;
octet = (uint32_t) ((uint8_t) *(++str));
if ((octet & (128+64)) != 128) /* Format isn't 10xxxxxx? */
return UNICODE_BOGUS_CHAR_VALUE;
*_str += 4; /* skip to next possible start of codepoint. */
return UNICODE_BOGUS_CHAR_VALUE;
} /* else if */
else /* six octets */
{
(*_str)++; /* advance at least one byte in case of an error */
octet = (uint32_t) ((uint8_t) *(++str));
if ((octet & (128+64)) != 128) /* Format isn't 10xxxxxx? */
return UNICODE_BOGUS_CHAR_VALUE;
octet = (uint32_t) ((uint8_t) *(++str));
if ((octet & (128+64)) != 128) /* Format isn't 10xxxxxx? */
return UNICODE_BOGUS_CHAR_VALUE;
octet = (uint32_t) ((uint8_t) *(++str));
if ((octet & (128+64)) != 128) /* Format isn't 10xxxxxx? */
return UNICODE_BOGUS_CHAR_VALUE;
octet = (uint32_t) ((uint8_t) *(++str));
if ((octet & (128+64)) != 128) /* Format isn't 10xxxxxx? */
return UNICODE_BOGUS_CHAR_VALUE;
octet = (uint32_t) ((uint8_t) *(++str));
if ((octet & (128+64)) != 128) /* Format isn't 10xxxxxx? */
return UNICODE_BOGUS_CHAR_VALUE;
*_str += 6; /* skip to next possible start of codepoint. */
return UNICODE_BOGUS_CHAR_VALUE;
} /* else if */
return UNICODE_BOGUS_CHAR_VALUE;
}
void FAudio_UTF8_To_UTF16(const char *src, uint16_t *dst, size_t len)
{
len -= sizeof (uint16_t); /* save room for null char. */
while (len >= sizeof (uint16_t))
{
uint32_t cp = FAudio_UTF8_CodePoint(&src);
if (cp == 0)
break;
else if (cp == UNICODE_BOGUS_CHAR_VALUE)
cp = UNICODE_BOGUS_CHAR_CODEPOINT;
if (cp > 0xFFFF) /* encode as surrogate pair */
{
if (len < (sizeof (uint16_t) * 2))
break; /* not enough room for the pair, stop now. */
cp -= 0x10000; /* Make this a 20-bit value */
*(dst++) = 0xD800 + ((cp >> 10) & 0x3FF);
len -= sizeof (uint16_t);
cp = 0xDC00 + (cp & 0x3FF);
} /* if */
*(dst++) = cp;
len -= sizeof (uint16_t);
} /* while */
*dst = 0;
}
/* vim: set noexpandtab shiftwidth=8 tabstop=8: */