Mercurial > SDL_sound_CoreAudio

annotate playsound/playsound_simple.c @ 495:d0d381a6f2bb stable-1.0

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Look for modplug headers in both include path and include path + "libmodplug". (thanks to Tyler for this one).
author Ryan C. Gordon <icculus@icculus.org>
date Wed, 12 Oct 2005 22:13:34 +0000
parents 1b91006ebfef
children 6455549cd562
rev   line source
492
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
1 /*
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
2 * SDL_sound -- An abstract sound format decoding API.
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
3 * Copyright (C) 2001 Ryan C. Gordon.
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
4 *
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
5 * This library is free software; you can redistribute it and/or
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
6 * modify it under the terms of the GNU Lesser General Public
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
7 * License as published by the Free Software Foundation; either
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
8 * version 2.1 of the License, or (at your option) any later version.
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
9 *
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
10 * This library is distributed in the hope that it will be useful,
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
13 * Lesser General Public License for more details.
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
14 *
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
15 * You should have received a copy of the GNU Lesser General Public
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
16 * License along with this library; if not, write to the Free Software
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
18 */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
19
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
20 /**
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
21 * This is just a simple "decode sound, play it through SDL" example.
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
22 * The much more complex, fancy, and robust code is playsound.c.
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
23 *
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
24 * Please see the file COPYING in the source's root directory.
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
25 *
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
26 * This file written by Ryan C. Gordon. (icculus@clutteredmind.org)
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
27 */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
28
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
29 #include "SDL.h"
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
30 #include "SDL_sound.h"
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
31
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
32 /* global decoding state. */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
33 typedef struct
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
34 {
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
35 Sound_Sample *sample;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
36 SDL_AudioSpec devformat;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
37 Uint8 *decoded_ptr;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
38 Uint32 decoded_bytes;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
39 } PlaysoundAudioCallbackData;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
40
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
41 /*
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
42 * This variable is flipped to non-zero when the audio callback has
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
43 * finished playing the whole file.
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
44 */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
45 static volatile int global_done_flag = 0;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
46
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
47
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
48 /*
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
49 * The audio callback. SDL calls this frequently to feed the audio device.
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
50 * We decode the audio file being played in here in small chunks and feed
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
51 * the device as necessary. Other solutions may want to predecode more
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
52 * (or all) of the file, since this needs to run fast and frequently,
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
53 * but since we're only sitting here and waiting for the file to play,
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
54 * the only real requirement is that we can decode a given audio file
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
55 * faster than realtime, which isn't really a problem with any modern format
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
56 * on even pretty old hardware at this point.
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
57 */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
58 static void audio_callback(void *userdata, Uint8 *stream, int len)
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
59 {
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
60 PlaysoundAudioCallbackData *data = (PlaysoundAudioCallbackData *) userdata;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
61 Sound_Sample *sample = data->sample;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
62 int bw = 0; /* bytes written to stream this time through the callback */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
63
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
64 while (bw < len)
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
65 {
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
66 int cpysize; /* bytes to copy on this iteration of the loop. */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
67
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
68 if (data->decoded_bytes == 0) /* need more data! */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
69 {
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
70 /* if there wasn't previously an error or EOF, read more. */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
71 if ( ((sample->flags & SOUND_SAMPLEFLAG_ERROR) == 0) &&
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
72 ((sample->flags & SOUND_SAMPLEFLAG_EOF) == 0) )
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
73 {
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
74 data->decoded_bytes = Sound_Decode(sample);
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
75 data->decoded_ptr = sample->buffer;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
76 } /* if */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
77
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
78 if (data->decoded_bytes == 0)
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
79 {
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
80 /* ...there isn't any more data to read! */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
81 memset(stream + bw, '\0', len - bw); /* write silence. */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
82 global_done_flag = 1;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
83 return; /* we're done playback, one way or another. */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
84 } /* if */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
85 } /* if */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
86
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
87 /* we have data decoded and ready to write to the device... */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
88 cpysize = len - bw; /* len - bw == amount device still wants. */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
89 if (cpysize > data->decoded_bytes)
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
90 cpysize = data->decoded_bytes; /* clamp to what we have left. */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
91
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
92 /* if it's 0, next iteration will decode more or decide we're done. */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
93 if (cpysize > 0)
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
94 {
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
95 /* write this iteration's data to the device. */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
96 memcpy(stream + bw, (Uint8 *) data->decoded_ptr, cpysize);
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
97
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
98 /* update state for next iteration or callback */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
99 bw += cpysize;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
100 data->decoded_ptr += cpysize;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
101 data->decoded_bytes -= cpysize;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
102 } /* if */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
103 } /* while */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
104 } /* audio_callback */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
105
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
106
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
107
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
108 static void playOneSoundFile(const char *fname)
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
109 {
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
110 PlaysoundAudioCallbackData data;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
111
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
112 memset(&data, '\0', sizeof (PlaysoundAudioCallbackData));
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
113 data.sample = Sound_NewSampleFromFile(fname, NULL, 65536);
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
114 if (data.sample == NULL)
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
115 {
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
116 fprintf(stderr, "Couldn't load '%s': %s.\n", fname, Sound_GetError());
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
117 return;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
118 } /* if */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
119
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
120 /*
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
121 * Open device in format of the the sound to be played.
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
122 * We open and close the device for each sound file, so that SDL
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
123 * handles the data conversion to hardware format; this is the
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
124 * easy way out, but isn't practical for most apps. Usually you'll
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
125 * want to pick one format for all the data or one format for the
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
126 * audio device and convert the data when needed. This is a more
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
127 * complex issue than I can describe in a source code comment, though.
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
128 */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
129 data.devformat.freq = data.sample->actual.rate;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
130 data.devformat.format = data.sample->actual.format;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
131 data.devformat.channels = data.sample->actual.channels;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
132 data.devformat.samples = 4096; /* I just picked a largish number here. */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
133 data.devformat.callback = audio_callback;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
134 data.devformat.userdata = &data;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
135 if (SDL_OpenAudio(&data.devformat, NULL) < 0)
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
136 {
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
137 fprintf(stderr, "Couldn't open audio device: %s.\n", SDL_GetError());
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
138 Sound_FreeSample(data.sample);
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
139 return;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
140 } /* if */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
141
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
142 printf("Now playing [%s]...\n", fname);
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
143 SDL_PauseAudio(0); /* SDL audio device is "paused" right after opening. */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
144
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
145 global_done_flag = 0; /* the audio callback will flip this flag. */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
146 while (!global_done_flag)
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
147 SDL_Delay(10); /* just wait for the audio callback to finish. */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
148
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
149 /* at this point, we've played the entire audio file. */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
150 SDL_PauseAudio(1); /* so stop the device. */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
151
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
152 /*
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
153 * Sleep two buffers' worth of audio before closing, in order
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
154 * to allow the playback to finish. This isn't always enough;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
155 * perhaps SDL needs a way to explicitly wait for device drain?
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
156 * Most apps don't have this issue, since they aren't explicitly
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
157 * closing the device as soon as a sound file is done playback.
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
158 * As an alternative for this app, you could also change the callback
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
159 * to write silence for a call or two before flipping global_done_flag.
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
160 */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
161 SDL_Delay(2 * 1000 * data.devformat.samples / data.devformat.freq);
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
162
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
163 /* if there was an error, tell the user. */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
164 if (data.sample->flags & SOUND_SAMPLEFLAG_ERROR)
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
165 fprintf(stderr, "Error decoding file: %s\n", Sound_GetError());
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
166
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
167 Sound_FreeSample(data.sample); /* clean up SDL_Sound resources... */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
168 SDL_CloseAudio(); /* will reopen with next file's format. */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
169 } /* playOneSoundFile */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
170
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
171
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
172 int main(int argc, char **argv)
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
173 {
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
174 int i;
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
175
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
176 if (!Sound_Init()) /* this calls SDL_Init(SDL_INIT_AUDIO) ... */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
177 {
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
178 fprintf(stderr, "Sound_Init() failed: %s.\n", Sound_GetError());
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
179 SDL_Quit();
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
180 return(42);
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
181 } /* if */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
182
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
183 for (i = 1; i < argc; i++) /* each arg is an audio file to play. */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
184 playOneSoundFile(argv[i]);
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
185
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
186 /* Shutdown the libraries... */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
187 Sound_Quit();
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
188 SDL_Quit();
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
189 return(0);
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
190 } /* main */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
191
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
192 /* end of playsound-simple.c ... */
1b91006ebfef Added playsound_simple.c, which is a better example
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
193