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Diffstat (limited to 'examples/common/sdl_sound.c')
| -rw-r--r-- | examples/common/sdl_sound.c | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/examples/common/sdl_sound.c b/examples/common/sdl_sound.c deleted file mode 100644 index 79a5bf32..00000000 --- a/examples/common/sdl_sound.c +++ /dev/null @@ -1,164 +0,0 @@ -/* - * SDL_sound Decoder Helpers - * - * Copyright (c) 2013 by Chris Robinson <[email protected]> - * - * 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; -} |