jailers/JailAudioSDL3
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JailAudioSDL3/jail_audio.cpp
Raimon Zamora 861c227c54 - [FIX] Evitar que sonen varies musiques a l'hora 
- [FIX] ResumeAudioStream al playar la musica
- [FIX] Parar un canal de audio abans de intentar usar-lo per a un nou só
- [FIX] No permetre canals negatius
- [FIX] Alliberar el stream al parar un canal
- [FIX] Arreglat el control de volum en l'aplicació de exemple
2025-03-27 12:54:14 +01:00

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#ifndef JA_USESDLMIXER
#include "jail_audio.h"
#include "stb_vorbis.c"
#include <SDL3/SDL.h>
#include <stdio.h>
#define JA_MAX_SIMULTANEOUS_CHANNELS 5
struct JA_Sound_t
{
SDL_AudioSpec spec { SDL_AUDIO_S16, 2, 48000 };
Uint32 length { 0 };
Uint8 *buffer { NULL };
};
struct JA_Channel_t
{
JA_Sound_t *sound { nullptr };
int pos { 0 };
int times { 0 };
SDL_AudioStream *stream { nullptr };
JA_Channel_state state { JA_CHANNEL_FREE };
};
struct JA_Music_t
{
SDL_AudioSpec spec { SDL_AUDIO_S16, 2, 48000 };
Uint32 length { 0 };
Uint8 *buffer { nullptr };
int pos { 0 };
int times { 0 };
SDL_AudioStream *stream { nullptr };
JA_Music_state state { JA_MUSIC_INVALID };
};
JA_Music_t *current_music { nullptr };
JA_Channel_t channels[JA_MAX_SIMULTANEOUS_CHANNELS];
SDL_AudioSpec JA_audioSpec { SDL_AUDIO_S16, 2, 48000 };
float JA_musicVolume { 1.0f };
float JA_soundVolume { 0.5f };
bool JA_musicEnabled { true };
bool JA_soundEnabled { true };
SDL_AudioDeviceID sdlAudioDevice { 0 };
SDL_TimerID JA_timerID { 0 };
bool fading = false;
int fade_start_time;
int fade_duration;
int fade_initial_volume;
/*
void audioCallback(void * userdata, uint8_t * stream, int len) {
SDL_memset(stream, 0, len);
if (current_music != NULL && current_music->state == JA_MUSIC_PLAYING) {
const int size = SDL_min(len, current_music->samples*2-current_music->pos);
SDL_MixAudioFormat(stream, (Uint8*)(current_music->output+current_music->pos), AUDIO_S16, size, JA_musicVolume);
current_music->pos += size/2;
if (size < len) {
if (current_music->times != 0) {
SDL_MixAudioFormat(stream+size, (Uint8*)current_music->output, AUDIO_S16, len-size, JA_musicVolume);
current_music->pos = (len-size)/2;
if (current_music->times > 0) current_music->times--;
} else {
current_music->pos = 0;
current_music->state = JA_MUSIC_STOPPED;
}
}
}
// Mixar els channels mi amol
for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++) {
if (channels[i].state == JA_CHANNEL_PLAYING) {
const int size = SDL_min(len, channels[i].sound->length - channels[i].pos);
SDL_MixAudioFormat(stream, channels[i].sound->buffer + channels[i].pos, AUDIO_S16, size, JA_soundVolume);
channels[i].pos += size;
if (size < len) {
if (channels[i].times != 0) {
SDL_MixAudioFormat(stream + size, channels[i].sound->buffer, AUDIO_S16, len-size, JA_soundVolume);
channels[i].pos = len-size;
if (channels[i].times > 0) channels[i].times--;
} else {
JA_StopChannel(i);
}
}
}
}
}
*/
Uint32 JA_UpdateCallback(void *userdata, SDL_TimerID timerID, Uint32 interval)
{
if (JA_musicEnabled && current_music && current_music->state == JA_MUSIC_PLAYING)
{
if (fading) {
int time = SDL_GetTicks();
if (time > (fade_start_time+fade_duration)) {
fading = false;
JA_StopMusic();
} else {
const int time_passed = time - fade_start_time;
const float percent = (float)time_passed / (float)fade_duration;
SDL_SetAudioStreamGain(current_music->stream, 1.0 - percent);
}
}
if (current_music->times != 0)
{
if (SDL_GetAudioStreamAvailable(current_music->stream) < (current_music->length/2)) {
SDL_PutAudioStreamData(current_music->stream, current_music->buffer, current_music->length);
}
if (current_music->times>0) current_music->times--;
}
else
{
if (SDL_GetAudioStreamAvailable(current_music->stream) == 0) JA_StopMusic();
}
}
if (JA_soundEnabled)
{
for (int i=0; i < JA_MAX_SIMULTANEOUS_CHANNELS; ++i)
if (channels[i].state == JA_CHANNEL_PLAYING)
{
if (channels[i].times != 0)
{
if (SDL_GetAudioStreamAvailable(channels[i].stream) < (channels[i].sound->length/2))
SDL_PutAudioStreamData(channels[i].stream, channels[i].sound->buffer, channels[i].sound->length);
if (channels[i].times>0) channels[i].times--;
}
}
else
{
if (SDL_GetAudioStreamAvailable(channels[i].stream) == 0) JA_StopChannel(i);
}
}
return 30;
}
void JA_Init(const int freq, const SDL_AudioFormat format, const int channels)
{
#ifdef DEBUG
SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_DEBUG);
#endif
SDL_Log("Iniciant JailAudio...");
JA_audioSpec = {format, channels, freq };
if (!sdlAudioDevice) SDL_CloseAudioDevice(sdlAudioDevice);
sdlAudioDevice = SDL_OpenAudioDevice(SDL_AUDIO_DEVICE_DEFAULT_PLAYBACK, &JA_audioSpec);
SDL_Log( (sdlAudioDevice==0) ? "Failed to initialize SDL audio!\n" : "OK!\n");
SDL_PauseAudioDevice(sdlAudioDevice);
JA_timerID = SDL_AddTimer(30, JA_UpdateCallback, nullptr);
}
void JA_Quit()
{
if (JA_timerID) SDL_RemoveTimer(JA_timerID);
if (!sdlAudioDevice) SDL_CloseAudioDevice(sdlAudioDevice);
sdlAudioDevice = 0;
}
JA_Music_t *JA_LoadMusic(Uint8* buffer, Uint32 length)
{
JA_Music_t *music = new JA_Music_t();
int chan, samplerate;
short *output;
music->length = stb_vorbis_decode_memory(buffer, length, &chan, &samplerate, &output) * chan * 2;
music->spec.channels = chan;
music->spec.freq = samplerate;
music->spec.format = SDL_AUDIO_S16;
music->buffer = (Uint8*)SDL_malloc(music->length);
SDL_memcpy(music->buffer, output, music->length);
free(output);
music->pos = 0;
music->state = JA_MUSIC_STOPPED;
return music;
}
JA_Music_t *JA_LoadMusic(const char* filename)
{
// [RZC 28/08/22] Carreguem primer el arxiu en memòria i després el descomprimim. Es algo més rapid.
FILE *f = fopen(filename, "rb");
fseek(f, 0, SEEK_END);
long fsize = ftell(f);
fseek(f, 0, SEEK_SET);
Uint8 *buffer = (Uint8*)malloc(fsize + 1);
if (fread(buffer, fsize, 1, f)!=1) return NULL;
fclose(f);
JA_Music_t *music = JA_LoadMusic(buffer, fsize);
free(buffer);
return music;
}
void JA_PlayMusic(JA_Music_t *music, const int loop)
{
if (!JA_musicEnabled) return;
JA_StopMusic();
current_music = music;
current_music->pos = 0;
current_music->state = JA_MUSIC_PLAYING;
current_music->times = loop;
current_music->stream = SDL_CreateAudioStream(&current_music->spec, &JA_audioSpec);
if (!SDL_PutAudioStreamData(current_music->stream, current_music->buffer, current_music->length)) printf("[ERROR] SDL_PutAudioStreamData failed!\n");
SDL_SetAudioStreamGain(current_music->stream, JA_musicVolume);
if (!SDL_BindAudioStream(sdlAudioDevice, current_music->stream)) printf("[ERROR] SDL_BindAudioStream failed!\n");
SDL_ResumeAudioStreamDevice(current_music->stream);
}
void JA_PauseMusic()
{
if (!JA_musicEnabled) return;
if (!current_music || current_music->state == JA_MUSIC_INVALID) return;
current_music->state = JA_MUSIC_PAUSED;
SDL_PauseAudioStreamDevice(current_music->stream);
}
void JA_ResumeMusic()
{
if (!JA_musicEnabled) return;
if (!current_music || current_music->state == JA_MUSIC_INVALID) return;
current_music->state = JA_MUSIC_PLAYING;
SDL_ResumeAudioStreamDevice(current_music->stream);
}
void JA_StopMusic()
{
if (!JA_musicEnabled) return;
if (!current_music || current_music->state == JA_MUSIC_INVALID) return;
current_music->pos = 0;
current_music->state = JA_MUSIC_STOPPED;
SDL_PauseAudioStreamDevice(current_music->stream);
SDL_DestroyAudioStream(current_music->stream);
current_music->stream = nullptr;
}
void JA_FadeOutMusic(const int milliseconds)
{
if (!JA_musicEnabled) return;
if (current_music == NULL || current_music->state == JA_MUSIC_INVALID) return;
fading = true;
fade_start_time = SDL_GetTicks();
fade_duration = milliseconds;
fade_initial_volume = JA_musicVolume;
}
JA_Music_state JA_GetMusicState()
{
if (!JA_musicEnabled) return JA_MUSIC_DISABLED;
if (!current_music) return JA_MUSIC_INVALID;
return current_music->state;
}
void JA_DeleteMusic(JA_Music_t *music)
{
if (current_music == music) current_music = nullptr;
SDL_free(music->buffer);
if (music->stream) SDL_DestroyAudioStream(music->stream);
delete music;
}
float JA_SetMusicVolume(float volume)
{
JA_musicVolume = SDL_clamp( volume, 0.0f, 1.0f );
if (current_music) SDL_SetAudioStreamGain(current_music->stream, JA_musicVolume);
return JA_musicVolume;
}
void JA_SetMusicPosition(float value)
{
if (!current_music) return;
current_music->pos = value * current_music->spec.freq;
}
float JA_GetMusicPosition()
{
if (!current_music) return 0;
return float(current_music->pos)/float(current_music->spec.freq);
}
void JA_EnableMusic(const bool value)
{
if ( !value && current_music && (current_music->state==JA_MUSIC_PLAYING) ) JA_StopMusic();
JA_musicEnabled = value;
}
JA_Sound_t *JA_NewSound(Uint8* buffer, Uint32 length)
{
JA_Sound_t *sound = new JA_Sound_t();
sound->buffer = buffer;
sound->length = length;
return sound;
}
JA_Sound_t *JA_LoadSound(uint8_t* buffer, uint32_t size)
{
JA_Sound_t *sound = new JA_Sound_t();
SDL_LoadWAV_IO(SDL_IOFromMem(buffer, size),1, &sound->spec, &sound->buffer, &sound->length);
return sound;
}
JA_Sound_t *JA_LoadSound(const char* filename)
{
JA_Sound_t *sound = new JA_Sound_t();
SDL_LoadWAV(filename, &sound->spec, &sound->buffer, &sound->length);
return sound;
}
int JA_PlaySound(JA_Sound_t *sound, const int loop)
{
if (!JA_soundEnabled) return -1;
int channel = 0;
while (channel < JA_MAX_SIMULTANEOUS_CHANNELS && channels[channel].state != JA_CHANNEL_FREE) { channel++; }
if (channel == JA_MAX_SIMULTANEOUS_CHANNELS) channel = 0;
JA_StopChannel(channel);
channels[channel].sound = sound;
channels[channel].times = loop;
channels[channel].pos = 0;
channels[channel].state = JA_CHANNEL_PLAYING;
channels[channel].stream = SDL_CreateAudioStream(&channels[channel].sound->spec, &JA_audioSpec);
SDL_PutAudioStreamData(channels[channel].stream, channels[channel].sound->buffer, channels[channel].sound->length);
SDL_SetAudioStreamGain(channels[channel].stream, JA_soundVolume);
SDL_BindAudioStream(sdlAudioDevice, channels[channel].stream);
return channel;
}
int JA_PlaySoundOnChannel(JA_Sound_t *sound, const int channel, const int loop)
{
if (!JA_soundEnabled) return -1;
if (channel < 0 || channel >= JA_MAX_SIMULTANEOUS_CHANNELS) return -1;
JA_StopChannel(channel);
channels[channel].sound = sound;
channels[channel].times = loop;
channels[channel].pos = 0;
channels[channel].state = JA_CHANNEL_PLAYING;
channels[channel].stream = SDL_CreateAudioStream(&channels[channel].sound->spec, &JA_audioSpec);
SDL_PutAudioStreamData(channels[channel].stream, channels[channel].sound->buffer, channels[channel].sound->length);
SDL_SetAudioStreamGain(channels[channel].stream, JA_soundVolume);
SDL_BindAudioStream(sdlAudioDevice, channels[channel].stream);
return channel;
}
void JA_DeleteSound(JA_Sound_t *sound)
{
for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++) {
if (channels[i].sound == sound) JA_StopChannel(i);
}
SDL_free(sound->buffer);
delete sound;
}
void JA_PauseChannel(const int channel)
{
if (!JA_soundEnabled) return;
if (channel == -1)
{
for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++)
if (channels[i].state == JA_CHANNEL_PLAYING)
{
channels[i].state = JA_CHANNEL_PAUSED;
SDL_PauseAudioStreamDevice(channels[i].stream);
}
}
else if (channel >= 0 && channel < JA_MAX_SIMULTANEOUS_CHANNELS)
{
if (channels[channel].state == JA_CHANNEL_PLAYING)
{
channels[channel].state = JA_CHANNEL_PAUSED;
SDL_PauseAudioStreamDevice(channels[channel].stream);
}
}
}
void JA_ResumeChannel(const int channel)
{
if (!JA_soundEnabled) return;
if (channel == -1)
{
for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++)
if (channels[i].state == JA_CHANNEL_PAUSED)
{
channels[i].state = JA_CHANNEL_PLAYING;
SDL_ResumeAudioStreamDevice(channels[i].stream);
}
}
else if (channel >= 0 && channel < JA_MAX_SIMULTANEOUS_CHANNELS)
{
if (channels[channel].state == JA_CHANNEL_PAUSED)
{
channels[channel].state = JA_CHANNEL_PLAYING;
SDL_ResumeAudioStreamDevice(channels[channel].stream);
}
}
}
void JA_StopChannel(const int channel)
{
if (!JA_soundEnabled) return;
if (channel == -1)
{
for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++) {
if (channels[i].state != JA_CHANNEL_FREE) SDL_DestroyAudioStream(channels[i].stream);
channels[i].state = JA_CHANNEL_FREE;
channels[i].pos = 0;
channels[i].sound = NULL;
}
}
else if (channel >= 0 && channel < JA_MAX_SIMULTANEOUS_CHANNELS)
{
if (channels[channel].state != JA_CHANNEL_FREE) SDL_DestroyAudioStream(channels[channel].stream);
channels[channel].state = JA_CHANNEL_FREE;
channels[channel].pos = 0;
channels[channel].sound = NULL;
}
}
JA_Channel_state JA_GetChannelState(const int channel)
{
if (!JA_soundEnabled) return JA_SOUND_DISABLED;
if (channel < 0 || channel >= JA_MAX_SIMULTANEOUS_CHANNELS) return JA_CHANNEL_INVALID;
return channels[channel].state;
}
float JA_SetSoundVolume(float volume)
{
JA_soundVolume = SDL_clamp( volume, 0.0f, 1.0f );
for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++)
if ( (channels[i].state == JA_CHANNEL_PLAYING) || (channels[i].state == JA_CHANNEL_PAUSED) )
SDL_SetAudioStreamGain(channels[i].stream, JA_soundVolume);
return JA_soundVolume;
}
void JA_EnableSound(const bool value)
{
for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++)
{
if (channels[i].state == JA_CHANNEL_PLAYING) JA_StopChannel(i);
}
JA_soundEnabled = value;
}
float JA_SetVolume(float volume)
{
JA_SetSoundVolume(JA_SetMusicVolume(volume) / 2.0f);
return JA_musicVolume;
}
#endif
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