mirror of
https://github.com/love2d/megasource.git
synced 2026-08-17 19:24:09 +02:00
Added OpenAL-Soft 1.16.0.
This commit is contained in:
rude
@@ -0,0 +1,327 @@
|
||||
/*
|
||||
* OpenAL Helpers
|
||||
*
|
||||
* Copyright (c) 2011 by Chris Robinson <chris.kcat@gmail.com>
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
/* This file contains routines to help with some menial OpenAL-related tasks,
|
||||
* such as opening a device and setting up a context, closing the device and
|
||||
* destroying its context, converting between frame counts and byte lengths,
|
||||
* finding an appropriate buffer format, and getting readable strings for
|
||||
* channel configs and sample types. */
|
||||
|
||||
#include <stdio.h>
|
||||
|
||||
#include "AL/al.h"
|
||||
#include "AL/alc.h"
|
||||
#include "AL/alext.h"
|
||||
|
||||
#include "alhelpers.h"
|
||||
|
||||
|
||||
/* InitAL opens the default device and sets up a context using default
|
||||
* attributes, making the program ready to call OpenAL functions. */
|
||||
int InitAL(void)
|
||||
{
|
||||
ALCdevice *device;
|
||||
ALCcontext *ctx;
|
||||
|
||||
/* Open and initialize a device with default settings */
|
||||
device = alcOpenDevice(NULL);
|
||||
if(!device)
|
||||
{
|
||||
fprintf(stderr, "Could not open a device!\n");
|
||||
return 1;
|
||||
}
|
||||
|
||||
ctx = alcCreateContext(device, NULL);
|
||||
if(ctx == NULL || alcMakeContextCurrent(ctx) == ALC_FALSE)
|
||||
{
|
||||
if(ctx != NULL)
|
||||
alcDestroyContext(ctx);
|
||||
alcCloseDevice(device);
|
||||
fprintf(stderr, "Could not set a context!\n");
|
||||
return 1;
|
||||
}
|
||||
|
||||
printf("Opened \"%s\"\n", alcGetString(device, ALC_DEVICE_SPECIFIER));
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* CloseAL closes the device belonging to the current context, and destroys the
|
||||
* context. */
|
||||
void CloseAL(void)
|
||||
{
|
||||
ALCdevice *device;
|
||||
ALCcontext *ctx;
|
||||
|
||||
ctx = alcGetCurrentContext();
|
||||
if(ctx == NULL)
|
||||
return;
|
||||
|
||||
device = alcGetContextsDevice(ctx);
|
||||
|
||||
alcMakeContextCurrent(NULL);
|
||||
alcDestroyContext(ctx);
|
||||
alcCloseDevice(device);
|
||||
}
|
||||
|
||||
|
||||
/* GetFormat retrieves a compatible buffer format given the channel config and
|
||||
* sample type. If an alIsBufferFormatSupportedSOFT-compatible function is
|
||||
* provided, it will be called to find the closest-matching format from
|
||||
* AL_SOFT_buffer_samples. Returns AL_NONE (0) if no supported format can be
|
||||
* found. */
|
||||
ALenum GetFormat(ALenum channels, ALenum type, LPALISBUFFERFORMATSUPPORTEDSOFT palIsBufferFormatSupportedSOFT)
|
||||
{
|
||||
ALenum format = AL_NONE;
|
||||
|
||||
/* If using AL_SOFT_buffer_samples, try looking through its formats */
|
||||
if(palIsBufferFormatSupportedSOFT)
|
||||
{
|
||||
/* AL_SOFT_buffer_samples is more lenient with matching formats. The
|
||||
* specified sample type does not need to match the returned format,
|
||||
* but it is nice to try to get something close. */
|
||||
if(type == AL_UNSIGNED_BYTE_SOFT || type == AL_BYTE_SOFT)
|
||||
{
|
||||
if(channels == AL_MONO_SOFT) format = AL_MONO8_SOFT;
|
||||
else if(channels == AL_STEREO_SOFT) format = AL_STEREO8_SOFT;
|
||||
else if(channels == AL_QUAD_SOFT) format = AL_QUAD8_SOFT;
|
||||
else if(channels == AL_5POINT1_SOFT) format = AL_5POINT1_8_SOFT;
|
||||
else if(channels == AL_6POINT1_SOFT) format = AL_6POINT1_8_SOFT;
|
||||
else if(channels == AL_7POINT1_SOFT) format = AL_7POINT1_8_SOFT;
|
||||
}
|
||||
else if(type == AL_UNSIGNED_SHORT_SOFT || type == AL_SHORT_SOFT)
|
||||
{
|
||||
if(channels == AL_MONO_SOFT) format = AL_MONO16_SOFT;
|
||||
else if(channels == AL_STEREO_SOFT) format = AL_STEREO16_SOFT;
|
||||
else if(channels == AL_QUAD_SOFT) format = AL_QUAD16_SOFT;
|
||||
else if(channels == AL_5POINT1_SOFT) format = AL_5POINT1_16_SOFT;
|
||||
else if(channels == AL_6POINT1_SOFT) format = AL_6POINT1_16_SOFT;
|
||||
else if(channels == AL_7POINT1_SOFT) format = AL_7POINT1_16_SOFT;
|
||||
}
|
||||
else if(type == AL_UNSIGNED_BYTE3_SOFT || type == AL_BYTE3_SOFT ||
|
||||
type == AL_UNSIGNED_INT_SOFT || type == AL_INT_SOFT ||
|
||||
type == AL_FLOAT_SOFT || type == AL_DOUBLE_SOFT)
|
||||
{
|
||||
if(channels == AL_MONO_SOFT) format = AL_MONO32F_SOFT;
|
||||
else if(channels == AL_STEREO_SOFT) format = AL_STEREO32F_SOFT;
|
||||
else if(channels == AL_QUAD_SOFT) format = AL_QUAD32F_SOFT;
|
||||
else if(channels == AL_5POINT1_SOFT) format = AL_5POINT1_32F_SOFT;
|
||||
else if(channels == AL_6POINT1_SOFT) format = AL_6POINT1_32F_SOFT;
|
||||
else if(channels == AL_7POINT1_SOFT) format = AL_7POINT1_32F_SOFT;
|
||||
}
|
||||
|
||||
if(format != AL_NONE && !palIsBufferFormatSupportedSOFT(format))
|
||||
format = AL_NONE;
|
||||
|
||||
/* A matching format was not found or supported. Try 32-bit float. */
|
||||
if(format == AL_NONE)
|
||||
{
|
||||
if(channels == AL_MONO_SOFT) format = AL_MONO32F_SOFT;
|
||||
else if(channels == AL_STEREO_SOFT) format = AL_STEREO32F_SOFT;
|
||||
else if(channels == AL_QUAD_SOFT) format = AL_QUAD32F_SOFT;
|
||||
else if(channels == AL_5POINT1_SOFT) format = AL_5POINT1_32F_SOFT;
|
||||
else if(channels == AL_6POINT1_SOFT) format = AL_6POINT1_32F_SOFT;
|
||||
else if(channels == AL_7POINT1_SOFT) format = AL_7POINT1_32F_SOFT;
|
||||
|
||||
if(format != AL_NONE && !palIsBufferFormatSupportedSOFT(format))
|
||||
format = AL_NONE;
|
||||
}
|
||||
/* 32-bit float not supported. Try 16-bit int. */
|
||||
if(format == AL_NONE)
|
||||
{
|
||||
if(channels == AL_MONO_SOFT) format = AL_MONO16_SOFT;
|
||||
else if(channels == AL_STEREO_SOFT) format = AL_STEREO16_SOFT;
|
||||
else if(channels == AL_QUAD_SOFT) format = AL_QUAD16_SOFT;
|
||||
else if(channels == AL_5POINT1_SOFT) format = AL_5POINT1_16_SOFT;
|
||||
else if(channels == AL_6POINT1_SOFT) format = AL_6POINT1_16_SOFT;
|
||||
else if(channels == AL_7POINT1_SOFT) format = AL_7POINT1_16_SOFT;
|
||||
|
||||
if(format != AL_NONE && !palIsBufferFormatSupportedSOFT(format))
|
||||
format = AL_NONE;
|
||||
}
|
||||
/* 16-bit int not supported. Try 8-bit int. */
|
||||
if(format == AL_NONE)
|
||||
{
|
||||
if(channels == AL_MONO_SOFT) format = AL_MONO8_SOFT;
|
||||
else if(channels == AL_STEREO_SOFT) format = AL_STEREO8_SOFT;
|
||||
else if(channels == AL_QUAD_SOFT) format = AL_QUAD8_SOFT;
|
||||
else if(channels == AL_5POINT1_SOFT) format = AL_5POINT1_8_SOFT;
|
||||
else if(channels == AL_6POINT1_SOFT) format = AL_6POINT1_8_SOFT;
|
||||
else if(channels == AL_7POINT1_SOFT) format = AL_7POINT1_8_SOFT;
|
||||
|
||||
if(format != AL_NONE && !palIsBufferFormatSupportedSOFT(format))
|
||||
format = AL_NONE;
|
||||
}
|
||||
|
||||
return format;
|
||||
}
|
||||
|
||||
/* We use the AL_EXT_MCFORMATS extension to provide output of Quad, 5.1,
|
||||
* and 7.1 channel configs, AL_EXT_FLOAT32 for 32-bit float samples, and
|
||||
* AL_EXT_DOUBLE for 64-bit float samples. */
|
||||
if(type == AL_UNSIGNED_BYTE_SOFT)
|
||||
{
|
||||
if(channels == AL_MONO_SOFT)
|
||||
format = AL_FORMAT_MONO8;
|
||||
else if(channels == AL_STEREO_SOFT)
|
||||
format = AL_FORMAT_STEREO8;
|
||||
else if(alIsExtensionPresent("AL_EXT_MCFORMATS"))
|
||||
{
|
||||
if(channels == AL_QUAD_SOFT)
|
||||
format = alGetEnumValue("AL_FORMAT_QUAD8");
|
||||
else if(channels == AL_5POINT1_SOFT)
|
||||
format = alGetEnumValue("AL_FORMAT_51CHN8");
|
||||
else if(channels == AL_6POINT1_SOFT)
|
||||
format = alGetEnumValue("AL_FORMAT_61CHN8");
|
||||
else if(channels == AL_7POINT1_SOFT)
|
||||
format = alGetEnumValue("AL_FORMAT_71CHN8");
|
||||
}
|
||||
}
|
||||
else if(type == AL_SHORT_SOFT)
|
||||
{
|
||||
if(channels == AL_MONO_SOFT)
|
||||
format = AL_FORMAT_MONO16;
|
||||
else if(channels == AL_STEREO_SOFT)
|
||||
format = AL_FORMAT_STEREO16;
|
||||
else if(alIsExtensionPresent("AL_EXT_MCFORMATS"))
|
||||
{
|
||||
if(channels == AL_QUAD_SOFT)
|
||||
format = alGetEnumValue("AL_FORMAT_QUAD16");
|
||||
else if(channels == AL_5POINT1_SOFT)
|
||||
format = alGetEnumValue("AL_FORMAT_51CHN16");
|
||||
else if(channels == AL_6POINT1_SOFT)
|
||||
format = alGetEnumValue("AL_FORMAT_61CHN16");
|
||||
else if(channels == AL_7POINT1_SOFT)
|
||||
format = alGetEnumValue("AL_FORMAT_71CHN16");
|
||||
}
|
||||
}
|
||||
else if(type == AL_FLOAT_SOFT && alIsExtensionPresent("AL_EXT_FLOAT32"))
|
||||
{
|
||||
if(channels == AL_MONO_SOFT)
|
||||
format = alGetEnumValue("AL_FORMAT_MONO_FLOAT32");
|
||||
else if(channels == AL_STEREO_SOFT)
|
||||
format = alGetEnumValue("AL_FORMAT_STEREO_FLOAT32");
|
||||
else if(alIsExtensionPresent("AL_EXT_MCFORMATS"))
|
||||
{
|
||||
if(channels == AL_QUAD_SOFT)
|
||||
format = alGetEnumValue("AL_FORMAT_QUAD32");
|
||||
else if(channels == AL_5POINT1_SOFT)
|
||||
format = alGetEnumValue("AL_FORMAT_51CHN32");
|
||||
else if(channels == AL_6POINT1_SOFT)
|
||||
format = alGetEnumValue("AL_FORMAT_61CHN32");
|
||||
else if(channels == AL_7POINT1_SOFT)
|
||||
format = alGetEnumValue("AL_FORMAT_71CHN32");
|
||||
}
|
||||
}
|
||||
else if(type == AL_DOUBLE_SOFT && alIsExtensionPresent("AL_EXT_DOUBLE"))
|
||||
{
|
||||
if(channels == AL_MONO_SOFT)
|
||||
format = alGetEnumValue("AL_FORMAT_MONO_DOUBLE");
|
||||
else if(channels == AL_STEREO_SOFT)
|
||||
format = alGetEnumValue("AL_FORMAT_STEREO_DOUBLE");
|
||||
}
|
||||
|
||||
/* NOTE: It seems OSX returns -1 from alGetEnumValue for unknown enums, as
|
||||
* opposed to 0. Correct it. */
|
||||
if(format == -1)
|
||||
format = 0;
|
||||
|
||||
return format;
|
||||
}
|
||||
|
||||
|
||||
void AL_APIENTRY wrap_BufferSamples(ALuint buffer, ALuint samplerate,
|
||||
ALenum internalformat, ALsizei samples,
|
||||
ALenum channels, ALenum type,
|
||||
const ALvoid *data)
|
||||
{
|
||||
alBufferData(buffer, internalformat, data,
|
||||
FramesToBytes(samples, channels, type),
|
||||
samplerate);
|
||||
}
|
||||
|
||||
|
||||
const char *ChannelsName(ALenum chans)
|
||||
{
|
||||
switch(chans)
|
||||
{
|
||||
case AL_MONO_SOFT: return "Mono";
|
||||
case AL_STEREO_SOFT: return "Stereo";
|
||||
case AL_REAR_SOFT: return "Rear";
|
||||
case AL_QUAD_SOFT: return "Quadraphonic";
|
||||
case AL_5POINT1_SOFT: return "5.1 Surround";
|
||||
case AL_6POINT1_SOFT: return "6.1 Surround";
|
||||
case AL_7POINT1_SOFT: return "7.1 Surround";
|
||||
}
|
||||
return "Unknown Channels";
|
||||
}
|
||||
|
||||
const char *TypeName(ALenum type)
|
||||
{
|
||||
switch(type)
|
||||
{
|
||||
case AL_BYTE_SOFT: return "S8";
|
||||
case AL_UNSIGNED_BYTE_SOFT: return "U8";
|
||||
case AL_SHORT_SOFT: return "S16";
|
||||
case AL_UNSIGNED_SHORT_SOFT: return "U16";
|
||||
case AL_INT_SOFT: return "S32";
|
||||
case AL_UNSIGNED_INT_SOFT: return "U32";
|
||||
case AL_FLOAT_SOFT: return "Float32";
|
||||
case AL_DOUBLE_SOFT: return "Float64";
|
||||
}
|
||||
return "Unknown Type";
|
||||
}
|
||||
|
||||
|
||||
ALsizei FramesToBytes(ALsizei size, ALenum channels, ALenum type)
|
||||
{
|
||||
switch(channels)
|
||||
{
|
||||
case AL_MONO_SOFT: size *= 1; break;
|
||||
case AL_STEREO_SOFT: size *= 2; break;
|
||||
case AL_REAR_SOFT: size *= 2; break;
|
||||
case AL_QUAD_SOFT: size *= 4; break;
|
||||
case AL_5POINT1_SOFT: size *= 6; break;
|
||||
case AL_6POINT1_SOFT: size *= 7; break;
|
||||
case AL_7POINT1_SOFT: size *= 8; break;
|
||||
}
|
||||
|
||||
switch(type)
|
||||
{
|
||||
case AL_BYTE_SOFT: size *= sizeof(ALbyte); break;
|
||||
case AL_UNSIGNED_BYTE_SOFT: size *= sizeof(ALubyte); break;
|
||||
case AL_SHORT_SOFT: size *= sizeof(ALshort); break;
|
||||
case AL_UNSIGNED_SHORT_SOFT: size *= sizeof(ALushort); break;
|
||||
case AL_INT_SOFT: size *= sizeof(ALint); break;
|
||||
case AL_UNSIGNED_INT_SOFT: size *= sizeof(ALuint); break;
|
||||
case AL_FLOAT_SOFT: size *= sizeof(ALfloat); break;
|
||||
case AL_DOUBLE_SOFT: size *= sizeof(ALdouble); break;
|
||||
}
|
||||
|
||||
return size;
|
||||
}
|
||||
|
||||
ALsizei BytesToFrames(ALsizei size, ALenum channels, ALenum type)
|
||||
{
|
||||
return size / FramesToBytes(1, channels, type);
|
||||
}
|
||||
@@ -0,0 +1,51 @@
|
||||
#ifndef ALHELPERS_H
|
||||
#define ALHELPERS_H
|
||||
|
||||
#ifndef _WIN32
|
||||
#include <unistd.h>
|
||||
#define Sleep(x) usleep((x)*1000)
|
||||
#else
|
||||
#define WIN32_LEAN_AND_MEAN
|
||||
#include <windows.h>
|
||||
#endif
|
||||
|
||||
#include "AL/alc.h"
|
||||
#include "AL/al.h"
|
||||
#include "AL/alext.h"
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif /* __cplusplus */
|
||||
|
||||
/* Some helper functions to get the name from the channel and type enums. */
|
||||
const char *ChannelsName(ALenum chans);
|
||||
const char *TypeName(ALenum type);
|
||||
|
||||
/* Helpers to convert frame counts and byte lengths. */
|
||||
ALsizei FramesToBytes(ALsizei size, ALenum channels, ALenum type);
|
||||
ALsizei BytesToFrames(ALsizei size, ALenum channels, ALenum type);
|
||||
|
||||
/* Retrieves a compatible buffer format given the channel configuration and
|
||||
* sample type. If an alIsBufferFormatSupportedSOFT-compatible function is
|
||||
* provided, it will be called to find the closest-matching format from
|
||||
* AL_SOFT_buffer_samples. Returns AL_NONE (0) if no supported format can be
|
||||
* found. */
|
||||
ALenum GetFormat(ALenum channels, ALenum type, LPALISBUFFERFORMATSUPPORTEDSOFT palIsBufferFormatSupportedSOFT);
|
||||
|
||||
/* Loads samples into a buffer using the standard alBufferData call, but with a
|
||||
* LPALBUFFERSAMPLESSOFT-compatible prototype. Assumes internalformat is valid
|
||||
* for alBufferData, and that channels and type match it. */
|
||||
void AL_APIENTRY wrap_BufferSamples(ALuint buffer, ALuint samplerate,
|
||||
ALenum internalformat, ALsizei samples,
|
||||
ALenum channels, ALenum type,
|
||||
const ALvoid *data);
|
||||
|
||||
/* Easy device init/deinit functions. InitAL returns 0 on success. */
|
||||
int InitAL(void);
|
||||
void CloseAL(void);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif /* __cplusplus */
|
||||
|
||||
#endif /* ALHELPERS_H */
|
||||
@@ -0,0 +1,164 @@
|
||||
/*
|
||||
* SDL_sound Decoder Helpers
|
||||
*
|
||||
* Copyright (c) 2013 by Chris Robinson <chris.kcat@gmail.com>
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
/* This file contains routines for helping to decode audio using SDL_sound.
|
||||
* There's very little OpenAL-specific code here.
|
||||
*/
|
||||
#include "sdl_sound.h"
|
||||
|
||||
#include <string.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdio.h>
|
||||
#include <signal.h>
|
||||
#include <assert.h>
|
||||
|
||||
#include <SDL_sound.h>
|
||||
|
||||
#include "AL/al.h"
|
||||
#include "AL/alc.h"
|
||||
#include "AL/alext.h"
|
||||
|
||||
#include "alhelpers.h"
|
||||
|
||||
|
||||
static int done_init = 0;
|
||||
|
||||
FilePtr openAudioFile(const char *fname, size_t buftime_ms)
|
||||
{
|
||||
FilePtr file;
|
||||
ALuint rate;
|
||||
Uint32 bufsize;
|
||||
ALenum chans, type;
|
||||
|
||||
/* We need to make sure SDL_sound is initialized. */
|
||||
if(!done_init)
|
||||
{
|
||||
Sound_Init();
|
||||
done_init = 1;
|
||||
}
|
||||
|
||||
file = Sound_NewSampleFromFile(fname, NULL, 0);
|
||||
if(!file)
|
||||
{
|
||||
fprintf(stderr, "Failed to open %s: %s\n", fname, Sound_GetError());
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if(getAudioInfo(file, &rate, &chans, &type) != 0)
|
||||
{
|
||||
Sound_FreeSample(file);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
bufsize = FramesToBytes((ALsizei)(buftime_ms/1000.0*rate), chans, type);
|
||||
if(Sound_SetBufferSize(file, bufsize) == 0)
|
||||
{
|
||||
fprintf(stderr, "Failed to set buffer size to %u bytes: %s\n", bufsize, Sound_GetError());
|
||||
Sound_FreeSample(file);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
return file;
|
||||
}
|
||||
|
||||
void closeAudioFile(FilePtr file)
|
||||
{
|
||||
if(file)
|
||||
Sound_FreeSample(file);
|
||||
}
|
||||
|
||||
|
||||
int getAudioInfo(FilePtr file, ALuint *rate, ALenum *channels, ALenum *type)
|
||||
{
|
||||
if(file->actual.channels == 1)
|
||||
*channels = AL_MONO_SOFT;
|
||||
else if(file->actual.channels == 2)
|
||||
*channels = AL_STEREO_SOFT;
|
||||
else
|
||||
{
|
||||
fprintf(stderr, "Unsupported channel count: %d\n", file->actual.channels);
|
||||
return 1;
|
||||
}
|
||||
|
||||
if(file->actual.format == AUDIO_U8)
|
||||
*type = AL_UNSIGNED_BYTE_SOFT;
|
||||
else if(file->actual.format == AUDIO_S8)
|
||||
*type = AL_BYTE_SOFT;
|
||||
else if(file->actual.format == AUDIO_U16LSB || file->actual.format == AUDIO_U16MSB)
|
||||
*type = AL_UNSIGNED_SHORT_SOFT;
|
||||
else if(file->actual.format == AUDIO_S16LSB || file->actual.format == AUDIO_S16MSB)
|
||||
*type = AL_SHORT_SOFT;
|
||||
else
|
||||
{
|
||||
fprintf(stderr, "Unsupported sample format: 0x%04x\n", file->actual.format);
|
||||
return 1;
|
||||
}
|
||||
|
||||
*rate = file->actual.rate;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
uint8_t *getAudioData(FilePtr file, size_t *length)
|
||||
{
|
||||
*length = Sound_Decode(file);
|
||||
if(*length == 0)
|
||||
return NULL;
|
||||
if((file->actual.format == AUDIO_U16LSB && AUDIO_U16LSB != AUDIO_U16SYS) ||
|
||||
(file->actual.format == AUDIO_U16MSB && AUDIO_U16MSB != AUDIO_U16SYS) ||
|
||||
(file->actual.format == AUDIO_S16LSB && AUDIO_S16LSB != AUDIO_S16SYS) ||
|
||||
(file->actual.format == AUDIO_S16MSB && AUDIO_S16MSB != AUDIO_S16SYS))
|
||||
{
|
||||
/* Swap bytes if the decoded endianness doesn't match the system. */
|
||||
char *buffer = file->buffer;
|
||||
size_t i;
|
||||
for(i = 0;i < *length;i+=2)
|
||||
{
|
||||
char b = buffer[i];
|
||||
buffer[i] = buffer[i+1];
|
||||
buffer[i+1] = b;
|
||||
}
|
||||
}
|
||||
return file->buffer;
|
||||
}
|
||||
|
||||
void *decodeAudioStream(FilePtr file, size_t *length)
|
||||
{
|
||||
Uint32 got;
|
||||
char *mem;
|
||||
|
||||
got = Sound_DecodeAll(file);
|
||||
if(got == 0)
|
||||
{
|
||||
*length = 0;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
mem = malloc(got);
|
||||
memcpy(mem, file->buffer, got);
|
||||
|
||||
*length = got;
|
||||
return mem;
|
||||
}
|
||||
@@ -0,0 +1,43 @@
|
||||
#ifndef EXAMPLES_SDL_SOUND_H
|
||||
#define EXAMPLES_SDL_SOUND_H
|
||||
|
||||
#include "AL/al.h"
|
||||
|
||||
#include <SDL_sound.h>
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif /* __cplusplus */
|
||||
|
||||
/* Opaque handles to files and streams. Apps don't need to concern themselves
|
||||
* with the internals */
|
||||
typedef Sound_Sample *FilePtr;
|
||||
|
||||
/* Opens a file with SDL_sound, and specifies the size of the sample buffer in
|
||||
* milliseconds. */
|
||||
FilePtr openAudioFile(const char *fname, size_t buftime_ms);
|
||||
|
||||
/* Closes/frees an opened file */
|
||||
void closeAudioFile(FilePtr file);
|
||||
|
||||
/* Returns information about the given audio stream. Returns 0 on success. */
|
||||
int getAudioInfo(FilePtr file, ALuint *rate, ALenum *channels, ALenum *type);
|
||||
|
||||
/* Returns a pointer to the next available chunk of decoded audio. The size (in
|
||||
* bytes) of the returned data buffer is stored in 'length', and the returned
|
||||
* pointer is only valid until the next call to getAudioData. */
|
||||
uint8_t *getAudioData(FilePtr file, size_t *length);
|
||||
|
||||
/* Decodes all remaining data from the stream and returns a buffer containing
|
||||
* the audio data, with the size stored in 'length'. The returned pointer must
|
||||
* be freed with a call to free(). Note that since this decodes the whole
|
||||
* stream, using it on lengthy streams (eg, music) will use a lot of memory.
|
||||
* Such streams are better handled using getAudioData to keep smaller chunks in
|
||||
* memory at any given time. */
|
||||
void *decodeAudioStream(FilePtr, size_t *length);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif /* __cplusplus */
|
||||
|
||||
#endif /* EXAMPLES_SDL_SOUND_H */
|
||||
Reference in New Issue
Block a user