SDL_sound_CoreAudio: playsound/playsound

annotate playsound/playsound_simple.c @ 552:2e8907ff98e9

Replaced references to COPYING with references to LICENSE.txt ...

author	Ryan C. Gordon <icculus@icculus.org>
date	Tue, 09 Sep 2008 16:28:11 -0400
parents	2df1f5c62d38
children

rev	line source
494 355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	1 /*
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	2 * SDL_sound -- An abstract sound format decoding API.
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	3 * Copyright (C) 2001 Ryan C. Gordon.
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	4 *
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	5 * This library is free software; you can redistribute it and/or
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	6 * modify it under the terms of the GNU Lesser General Public
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	7 * License as published by the Free Software Foundation; either
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	8 * version 2.1 of the License, or (at your option) any later version.
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	9 *
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	10 * This library is distributed in the hope that it will be useful,
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	13 * Lesser General Public License for more details.
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	14 *
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	15 * You should have received a copy of the GNU Lesser General Public
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	16 * License along with this library; if not, write to the Free Software
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	18 */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	19
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	20 /**
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	21 * This is just a simple "decode sound, play it through SDL" example.
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	22 * The much more complex, fancy, and robust code is playsound.c.
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	23 *
552 2e8907ff98e9 Replaced references to COPYING with references to LICENSE.txt ... Ryan C. Gordon <icculus@icculus.org> parents: 526 diff changeset	24 * Please see the file LICENSE.txt in the source's root directory.
494 355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	25 *
526 2df1f5c62d38 Updated my email address. Ryan C. Gordon <icculus@icculus.org> parents: 506 diff changeset	26 * This file written by Ryan C. Gordon. (icculus@icculus.org)
494 355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	27 */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	28
504 6455549cd562 Clean up gcc4 compiler warnings. Ryan C. Gordon <icculus@icculus.org> parents: 494 diff changeset	29 #include <stdio.h>
6455549cd562 Clean up gcc4 compiler warnings. Ryan C. Gordon <icculus@icculus.org> parents: 494 diff changeset	30 #include <stdlib.h>
506 6ae286a80da5 Whoops, didn't actually fix the gcc4 warnings last time. Ryan C. Gordon <icculus@icculus.org> parents: 504 diff changeset	31 #include <string.h>
504 6455549cd562 Clean up gcc4 compiler warnings. Ryan C. Gordon <icculus@icculus.org> parents: 494 diff changeset	32
494 355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	33 #include "SDL.h"
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	34 #include "SDL_sound.h"
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	35
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	36 /* global decoding state. */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	37 typedef struct
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	38 {
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	39 Sound_Sample *sample;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	40 SDL_AudioSpec devformat;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	41 Uint8 *decoded_ptr;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	42 Uint32 decoded_bytes;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	43 } PlaysoundAudioCallbackData;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	44
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	45 /*
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	46 * This variable is flipped to non-zero when the audio callback has
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	47 * finished playing the whole file.
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	48 */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	49 static volatile int global_done_flag = 0;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	50
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	51
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	52 /*
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	53 * The audio callback. SDL calls this frequently to feed the audio device.
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	54 * We decode the audio file being played in here in small chunks and feed
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	55 * the device as necessary. Other solutions may want to predecode more
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	56 * (or all) of the file, since this needs to run fast and frequently,
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	57 * but since we're only sitting here and waiting for the file to play,
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	58 * the only real requirement is that we can decode a given audio file
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	59 * faster than realtime, which isn't really a problem with any modern format
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	60 * on even pretty old hardware at this point.
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	61 */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	62 static void audio_callback(void userdata, Uint8 stream, int len)
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	63 {
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	64 PlaysoundAudioCallbackData data = (PlaysoundAudioCallbackData ) userdata;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	65 Sound_Sample *sample = data->sample;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	66 int bw = 0; /* bytes written to stream this time through the callback */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	67
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	68 while (bw < len)
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	69 {
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	70 int cpysize; /* bytes to copy on this iteration of the loop. */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	71
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	72 if (data->decoded_bytes == 0) /* need more data! */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	73 {
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	74 /* if there wasn't previously an error or EOF, read more. */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	75 if ( ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) &&
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	76 ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) )
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	77 {
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	78 data->decoded_bytes = Sound_Decode(sample);
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	79 data->decoded_ptr = sample->buffer;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	80 } /* if */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	81
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	82 if (data->decoded_bytes == 0)
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	83 {
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	84 /* ...there isn't any more data to read! */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	85 memset(stream + bw, '\0', len - bw); /* write silence. */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	86 global_done_flag = 1;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	87 return; /* we're done playback, one way or another. */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	88 } /* if */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	89 } /* if */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	90
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	91 /* we have data decoded and ready to write to the device... */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	92 cpysize = len - bw; /* len - bw == amount device still wants. */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	93 if (cpysize > data->decoded_bytes)
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	94 cpysize = data->decoded_bytes; /* clamp to what we have left. */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	95
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	96 /* if it's 0, next iteration will decode more or decide we're done. */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	97 if (cpysize > 0)
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	98 {
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	99 /* write this iteration's data to the device. */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	100 memcpy(stream + bw, (Uint8 *) data->decoded_ptr, cpysize);
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	101
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	102 /* update state for next iteration or callback */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	103 bw += cpysize;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	104 data->decoded_ptr += cpysize;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	105 data->decoded_bytes -= cpysize;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	106 } /* if */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	107 } /* while */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	108 } /* audio_callback */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	109
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	110
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	111
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	112 static void playOneSoundFile(const char *fname)
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	113 {
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	114 PlaysoundAudioCallbackData data;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	115
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	116 memset(&data, '\0', sizeof (PlaysoundAudioCallbackData));
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	117 data.sample = Sound_NewSampleFromFile(fname, NULL, 65536);
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	118 if (data.sample == NULL)
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	119 {
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	120 fprintf(stderr, "Couldn't load '%s': %s.\n", fname, Sound_GetError());
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	121 return;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	122 } /* if */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	123
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	124 /*
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	125 * Open device in format of the the sound to be played.
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	126 * We open and close the device for each sound file, so that SDL
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	127 * handles the data conversion to hardware format; this is the
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	128 * easy way out, but isn't practical for most apps. Usually you'll
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	129 * want to pick one format for all the data or one format for the
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	130 * audio device and convert the data when needed. This is a more
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	131 * complex issue than I can describe in a source code comment, though.
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	132 */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	133 data.devformat.freq = data.sample->actual.rate;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	134 data.devformat.format = data.sample->actual.format;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	135 data.devformat.channels = data.sample->actual.channels;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	136 data.devformat.samples = 4096; /* I just picked a largish number here. */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	137 data.devformat.callback = audio_callback;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	138 data.devformat.userdata = &data;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	139 if (SDL_OpenAudio(&data.devformat, NULL) < 0)
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	140 {
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	141 fprintf(stderr, "Couldn't open audio device: %s.\n", SDL_GetError());
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	142 Sound_FreeSample(data.sample);
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	143 return;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	144 } /* if */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	145
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	146 printf("Now playing [%s]...\n", fname);
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	147 SDL_PauseAudio(0); /* SDL audio device is "paused" right after opening. */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	148
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	149 global_done_flag = 0; /* the audio callback will flip this flag. */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	150 while (!global_done_flag)
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	151 SDL_Delay(10); /* just wait for the audio callback to finish. */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	152
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	153 /* at this point, we've played the entire audio file. */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	154 SDL_PauseAudio(1); /* so stop the device. */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	155
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	156 /*
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	157 * Sleep two buffers' worth of audio before closing, in order
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	158 * to allow the playback to finish. This isn't always enough;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	159 * perhaps SDL needs a way to explicitly wait for device drain?
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	160 * Most apps don't have this issue, since they aren't explicitly
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	161 * closing the device as soon as a sound file is done playback.
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	162 * As an alternative for this app, you could also change the callback
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	163 * to write silence for a call or two before flipping global_done_flag.
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	164 */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	165 SDL_Delay(2 * 1000 * data.devformat.samples / data.devformat.freq);
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	166
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	167 /* if there was an error, tell the user. */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	168 if (data.sample->flags & SOUND_SAMPLEFLAG_ERROR)
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	169 fprintf(stderr, "Error decoding file: %s\n", Sound_GetError());
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	170
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	171 Sound_FreeSample(data.sample); /* clean up SDL_Sound resources... */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	172 SDL_CloseAudio(); /* will reopen with next file's format. */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	173 } /* playOneSoundFile */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	174
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	175
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	176 int main(int argc, char **argv)
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	177 {
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	178 int i;
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	179
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	180 if (!Sound_Init()) /* this calls SDL_Init(SDL_INIT_AUDIO) ... */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	181 {
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	182 fprintf(stderr, "Sound_Init() failed: %s.\n", Sound_GetError());
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	183 SDL_Quit();
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	184 return(42);
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	185 } /* if */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	186
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	187 for (i = 1; i < argc; i++) /* each arg is an audio file to play. */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	188 playOneSoundFile(argv[i]);
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	189
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	190 /* Shutdown the libraries... */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	191 Sound_Quit();
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	192 SDL_Quit();
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	193 return(0);
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	194 } /* main */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	195
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	196 /* end of playsound-simple.c ... */
355129c687b7 Added playsound_simple.c, as a basic example. Ryan C. Gordon <icculus@icculus.org> parents: diff changeset	197

Mercurial > SDL_sound_CoreAudio

annotate playsound/playsound_simple.c @ 552:2e8907ff98e9