389 lines
10 KiB
C++
389 lines
10 KiB
C++
#ifndef JA_USESDLMIXER
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#include "jail_audio.h"
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#include <stdint.h> // para uint8_t
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#include <stdio.h> // para NULL, fseek, fclose, fopen, fread, ftell, FILE
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#include <stdlib.h> // para free, malloc
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#include "stb_vorbis.c" // para stb_vorbis_decode_memory
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#define JA_MAX_SIMULTANEOUS_CHANNELS 5
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struct JA_Sound_t
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{
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Uint32 length{0};
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Uint8 *buffer{NULL};
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};
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struct JA_Channel_t
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{
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JA_Sound_t *sound;
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int pos{0};
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int times{0};
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JA_Channel_state state{JA_CHANNEL_FREE};
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};
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struct JA_Music_t
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{
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int samples{0};
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int pos{0};
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int times{0};
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short *output{NULL};
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JA_Music_state state{JA_MUSIC_INVALID};
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};
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JA_Music_t *current_music{NULL};
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JA_Channel_t channels[JA_MAX_SIMULTANEOUS_CHANNELS];
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int JA_freq{48000};
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SDL_AudioFormat JA_format{AUDIO_S16};
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Uint8 JA_channels{2};
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int JA_musicVolume = 128;
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int JA_soundVolume = 64;
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bool JA_musicEnabled = true;
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bool JA_soundEnabled = true;
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SDL_AudioDeviceID sdlAudioDevice = 0;
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void audioCallback(void *userdata, uint8_t *stream, int len)
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{
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SDL_memset(stream, 0, len);
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if (current_music != NULL && current_music->state == JA_MUSIC_PLAYING)
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{
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const int size = SDL_min(len, current_music->samples * 2 - current_music->pos);
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SDL_MixAudioFormat(stream, (Uint8 *)(current_music->output + current_music->pos), AUDIO_S16, size, JA_musicVolume);
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current_music->pos += size / 2;
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if (size < len)
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{
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if (current_music->times != 0)
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{
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SDL_MixAudioFormat(stream + size, (Uint8 *)current_music->output, AUDIO_S16, len - size, JA_musicVolume);
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current_music->pos = (len - size) / 2;
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if (current_music->times > 0)
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current_music->times--;
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}
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else
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{
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current_music->pos = 0;
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current_music->state = JA_MUSIC_STOPPED;
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}
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}
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}
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// Mixar els channels mi amol
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for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++)
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{
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if (channels[i].state == JA_CHANNEL_PLAYING)
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{
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const int size = SDL_min(len, channels[i].sound->length - channels[i].pos);
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SDL_MixAudioFormat(stream, channels[i].sound->buffer + channels[i].pos, AUDIO_S16, size, JA_soundVolume);
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channels[i].pos += size;
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if (size < len)
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{
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if (channels[i].times != 0)
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{
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SDL_MixAudioFormat(stream + size, channels[i].sound->buffer, AUDIO_S16, len - size, JA_soundVolume);
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channels[i].pos = len - size;
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if (channels[i].times > 0)
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channels[i].times--;
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}
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else
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{
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JA_StopChannel(i);
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}
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}
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}
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}
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}
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void JA_Init(const int freq, const SDL_AudioFormat format, const int channels)
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{
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JA_freq = freq;
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JA_format = format;
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JA_channels = channels;
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SDL_AudioSpec audioSpec{JA_freq, JA_format, JA_channels, 0, 1024, 0, 0, audioCallback, NULL};
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if (sdlAudioDevice != 0)
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SDL_CloseAudioDevice(sdlAudioDevice);
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sdlAudioDevice = SDL_OpenAudioDevice(NULL, 0, &audioSpec, NULL, 0);
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SDL_PauseAudioDevice(sdlAudioDevice, 0);
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}
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void JA_Quit()
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{
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SDL_PauseAudioDevice(sdlAudioDevice, 1);
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if (sdlAudioDevice != 0)
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SDL_CloseAudioDevice(sdlAudioDevice);
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sdlAudioDevice = 0;
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}
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JA_Music_t *JA_LoadMusic(const char *filename)
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{
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int chan, samplerate;
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// [RZC 28/08/22] Carreguem primer el arxiu en memòria i després el descomprimim. Es algo més rapid.
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FILE *f = fopen(filename, "rb");
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fseek(f, 0, SEEK_END);
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long fsize = ftell(f);
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fseek(f, 0, SEEK_SET);
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Uint8 *buffer = (Uint8 *)malloc(fsize + 1);
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if (fread(buffer, fsize, 1, f) != 1)
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return NULL;
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fclose(f);
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JA_Music_t *music = new JA_Music_t();
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music->samples = stb_vorbis_decode_memory(buffer, fsize, &chan, &samplerate, &music->output);
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free(buffer);
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// [RZC 28/08/22] Abans el descomprimiem mentre el teniem obert
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// music->samples = stb_vorbis_decode_filename(filename, &chan, &samplerate, &music->output);
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SDL_AudioCVT cvt;
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SDL_BuildAudioCVT(&cvt, AUDIO_S16, chan, samplerate, JA_format, JA_channels, JA_freq);
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if (cvt.needed)
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{
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cvt.len = music->samples * chan * 2;
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cvt.buf = (Uint8 *)SDL_malloc(cvt.len * cvt.len_mult);
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SDL_memcpy(cvt.buf, music->output, cvt.len);
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SDL_ConvertAudio(&cvt);
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free(music->output);
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music->output = (short *)cvt.buf;
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}
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music->pos = 0;
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music->state = JA_MUSIC_STOPPED;
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return music;
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}
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void JA_PlayMusic(JA_Music_t *music, const int loop)
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{
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if (!JA_musicEnabled || !music)
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return;
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if (current_music != NULL)
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{
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current_music->pos = 0;
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current_music->state = JA_MUSIC_STOPPED;
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}
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current_music = music;
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current_music->pos = 0;
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current_music->state = JA_MUSIC_PLAYING;
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current_music->times = loop;
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}
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void JA_PauseMusic()
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{
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if (!JA_musicEnabled)
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return;
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if (current_music == NULL || current_music->state == JA_MUSIC_INVALID)
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return;
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current_music->state = JA_MUSIC_PAUSED;
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}
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void JA_ResumeMusic()
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{
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if (!JA_musicEnabled)
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return;
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if (current_music == NULL || current_music->state == JA_MUSIC_INVALID)
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return;
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current_music->state = JA_MUSIC_PLAYING;
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}
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void JA_StopMusic()
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{
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if (!JA_musicEnabled)
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return;
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if (current_music == NULL || current_music->state == JA_MUSIC_INVALID)
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return;
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current_music->pos = 0;
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current_music->state = JA_MUSIC_STOPPED;
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}
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JA_Music_state JA_GetMusicState()
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{
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if (!JA_musicEnabled)
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return JA_MUSIC_DISABLED;
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if (current_music == NULL)
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return JA_MUSIC_INVALID;
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return current_music->state;
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}
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void JA_DeleteMusic(JA_Music_t *music)
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{
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if (current_music == music)
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current_music = NULL;
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free(music->output);
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delete music;
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}
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int JA_SetMusicVolume(int volume)
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{
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JA_musicVolume = volume > 128 ? 128 : volume < 0 ? 0
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: volume;
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return JA_musicVolume;
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}
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void JA_EnableMusic(const bool value)
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{
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if (!value && current_music != NULL && current_music->state == JA_MUSIC_PLAYING)
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JA_StopMusic();
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JA_musicEnabled = value;
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}
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JA_Sound_t *JA_NewSound(Uint8 *buffer, Uint32 length)
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{
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JA_Sound_t *sound = new JA_Sound_t();
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sound->buffer = buffer;
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sound->length = length;
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return sound;
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}
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JA_Sound_t *JA_LoadSound(const char *filename)
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{
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JA_Sound_t *sound = new JA_Sound_t();
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SDL_AudioSpec wavSpec;
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SDL_LoadWAV(filename, &wavSpec, &sound->buffer, &sound->length);
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SDL_AudioCVT cvt;
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SDL_BuildAudioCVT(&cvt, wavSpec.format, wavSpec.channels, wavSpec.freq, JA_format, JA_channels, JA_freq);
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cvt.len = sound->length;
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cvt.buf = (Uint8 *)SDL_malloc(cvt.len * cvt.len_mult);
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SDL_memcpy(cvt.buf, sound->buffer, sound->length);
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SDL_ConvertAudio(&cvt);
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SDL_FreeWAV(sound->buffer);
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sound->buffer = cvt.buf;
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sound->length = cvt.len_cvt;
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return sound;
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}
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int JA_PlaySound(JA_Sound_t *sound, const int loop)
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{
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if (!JA_soundEnabled || !sound)
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return 0;
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int channel = 0;
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while (channel < JA_MAX_SIMULTANEOUS_CHANNELS && channels[channel].state != JA_CHANNEL_FREE)
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{
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channel++;
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}
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if (channel == JA_MAX_SIMULTANEOUS_CHANNELS)
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channel = 0;
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channels[channel].sound = sound;
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channels[channel].times = loop;
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channels[channel].pos = 0;
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channels[channel].state = JA_CHANNEL_PLAYING;
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return channel;
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}
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void JA_DeleteSound(JA_Sound_t *sound)
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{
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for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++)
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{
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if (channels[i].sound == sound)
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JA_StopChannel(i);
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}
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SDL_free(sound->buffer);
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delete sound;
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}
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void JA_PauseChannel(const int channel)
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{
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if (!JA_soundEnabled)
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return;
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if (channel == -1)
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{
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for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++)
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{
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if (channels[i].state == JA_CHANNEL_PLAYING)
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channels[i].state = JA_CHANNEL_PAUSED;
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}
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}
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else if (channel >= 0 && channel < JA_MAX_SIMULTANEOUS_CHANNELS)
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{
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if (channels[channel].state == JA_CHANNEL_PLAYING)
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channels[channel].state = JA_CHANNEL_PAUSED;
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}
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}
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void JA_ResumeChannel(const int channel)
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{
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if (!JA_soundEnabled)
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return;
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if (channel == -1)
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{
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for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++)
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{
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if (channels[i].state == JA_CHANNEL_PAUSED)
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channels[i].state = JA_CHANNEL_PLAYING;
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}
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}
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else if (channel >= 0 && channel < JA_MAX_SIMULTANEOUS_CHANNELS)
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{
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if (channels[channel].state == JA_CHANNEL_PAUSED)
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channels[channel].state = JA_CHANNEL_PLAYING;
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}
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}
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void JA_StopChannel(const int channel)
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{
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if (!JA_soundEnabled)
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return;
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if (channel == -1)
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{
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for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++)
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{
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channels[i].state = JA_CHANNEL_FREE;
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channels[i].pos = 0;
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channels[i].sound = NULL;
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}
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}
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else if (channel >= 0 && channel < JA_MAX_SIMULTANEOUS_CHANNELS)
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{
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channels[channel].state = JA_CHANNEL_FREE;
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channels[channel].pos = 0;
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channels[channel].sound = NULL;
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}
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}
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JA_Channel_state JA_GetChannelState(const int channel)
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{
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if (!JA_soundEnabled)
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return JA_SOUND_DISABLED;
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if (channel < 0 || channel >= JA_MAX_SIMULTANEOUS_CHANNELS)
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return JA_CHANNEL_INVALID;
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return channels[channel].state;
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}
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int JA_SetSoundVolume(int volume)
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{
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JA_soundVolume = volume > 128 ? 128 : volume < 0 ? 0
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: volume;
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return JA_soundVolume;
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}
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void JA_EnableSound(const bool value)
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{
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for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++)
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{
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if (channels[i].state == JA_CHANNEL_PLAYING)
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JA_StopChannel(i);
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}
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JA_soundEnabled = value;
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}
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int JA_SetVolume(int volume)
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{
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JA_musicVolume = volume > 128 ? 128 : volume < 0 ? 0
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: volume;
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JA_soundVolume = JA_musicVolume / 2;
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return JA_musicVolume;
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}
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#endif |