531 lines
18 KiB
C++
531 lines
18 KiB
C++
#pragma once
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// --- Includes ---
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#include <SDL3/SDL.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <string>
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#include <vector>
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#define STB_VORBIS_HEADER_ONLY
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#include "external/stb_vorbis.h"
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// --- Public Enums ---
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enum JA_Channel_state {
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JA_CHANNEL_INVALID,
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JA_CHANNEL_FREE,
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JA_CHANNEL_PLAYING,
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JA_CHANNEL_PAUSED,
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JA_SOUND_DISABLED,
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};
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enum JA_Music_state {
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JA_MUSIC_INVALID,
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JA_MUSIC_PLAYING,
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JA_MUSIC_PAUSED,
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JA_MUSIC_STOPPED,
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JA_MUSIC_DISABLED,
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};
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// --- Struct Definitions ---
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#define JA_MAX_SIMULTANEOUS_CHANNELS 20
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#define JA_MAX_GROUPS 2
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struct JA_Sound_t {
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SDL_AudioSpec spec{SDL_AUDIO_S16, 2, 48000};
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Uint32 length{0};
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Uint8* buffer{nullptr};
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};
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struct JA_Channel_t {
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JA_Sound_t* sound{nullptr};
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int pos{0};
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int times{0};
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int group{0};
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SDL_AudioStream* stream{nullptr};
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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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SDL_AudioSpec spec{SDL_AUDIO_S16, 2, 48000};
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// OGG comprimit en memòria. Propietat nostra; es copia des del buffer
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// d'entrada una sola vegada en JA_LoadMusic i es descomprimix en chunks
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// per streaming. Com que stb_vorbis guarda un punter persistent al
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// `.data()` d'aquest vector, no el podem resize'jar un cop establert
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// (una reallocation invalidaria el punter que el decoder conserva).
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std::vector<Uint8> ogg_data;
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stb_vorbis* vorbis{nullptr}; // handle del decoder, viu tot el cicle del JA_Music_t
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std::string filename;
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int times{0}; // loops restants (-1 = infinit, 0 = un sol play)
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SDL_AudioStream* stream{nullptr};
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JA_Music_state state{JA_MUSIC_INVALID};
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};
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// --- Internal Global State (inline, C++17) ---
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inline JA_Music_t* current_music{nullptr};
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inline JA_Channel_t channels[JA_MAX_SIMULTANEOUS_CHANNELS];
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inline SDL_AudioSpec JA_audioSpec{SDL_AUDIO_S16, 2, 48000};
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inline float JA_musicVolume{1.0f};
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inline float JA_soundVolume[JA_MAX_GROUPS];
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inline bool JA_musicEnabled{true};
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inline bool JA_soundEnabled{true};
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inline SDL_AudioDeviceID sdlAudioDevice{0};
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inline bool fading{false};
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inline int fade_start_time{0};
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inline int fade_duration{0};
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inline float fade_initial_volume{0.0f};
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// --- Forward Declarations ---
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inline void JA_StopMusic();
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inline void JA_StopChannel(const int channel);
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inline int JA_PlaySoundOnChannel(JA_Sound_t* sound, const int channel, const int loop = 0, const int group = 0);
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// --- Music streaming internals ---
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// Bytes-per-sample per canal (sempre s16)
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static constexpr int JA_MUSIC_BYTES_PER_SAMPLE = 2;
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// Quants shorts decodifiquem per crida a get_samples_short_interleaved.
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// 8192 shorts = 4096 samples/channel en estèreo ≈ 85ms de so a 48kHz.
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static constexpr int JA_MUSIC_CHUNK_SHORTS = 8192;
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// Umbral d'àudio per davant del cursor de reproducció. Mantenim ≥ 0.5 s a
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// l'SDL_AudioStream per absorbir jitter de frame i evitar underruns.
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static constexpr float JA_MUSIC_LOW_WATER_SECONDS = 0.5f;
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// Decodifica un chunk del vorbis i el volca a l'stream. Retorna samples
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// decodificats per canal (0 = EOF de l'stream vorbis).
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inline int JA_FeedMusicChunk(JA_Music_t* music) {
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if (!music || !music->vorbis || !music->stream) return 0;
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short chunk[JA_MUSIC_CHUNK_SHORTS];
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const int channels = music->spec.channels;
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const int samples_per_channel = stb_vorbis_get_samples_short_interleaved(
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music->vorbis,
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channels,
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chunk,
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JA_MUSIC_CHUNK_SHORTS);
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if (samples_per_channel <= 0) return 0;
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const int bytes = samples_per_channel * channels * JA_MUSIC_BYTES_PER_SAMPLE;
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SDL_PutAudioStreamData(music->stream, chunk, bytes);
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return samples_per_channel;
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}
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// Reompli l'stream fins que tinga ≥ JA_MUSIC_LOW_WATER_SECONDS bufferats.
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// En arribar a EOF del vorbis, aplica el loop (times) o deixa drenar.
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inline void JA_PumpMusic(JA_Music_t* music) {
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if (!music || !music->vorbis || !music->stream) return;
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const int bytes_per_second = music->spec.freq * music->spec.channels * JA_MUSIC_BYTES_PER_SAMPLE;
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const int low_water_bytes = static_cast<int>(JA_MUSIC_LOW_WATER_SECONDS * static_cast<float>(bytes_per_second));
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while (SDL_GetAudioStreamAvailable(music->stream) < low_water_bytes) {
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const int decoded = JA_FeedMusicChunk(music);
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if (decoded > 0) continue;
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// EOF: si queden loops, rebobinar; si no, tallar i deixar drenar.
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if (music->times != 0) {
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stb_vorbis_seek_start(music->vorbis);
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if (music->times > 0) music->times--;
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} else {
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break;
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}
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}
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}
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// --- Core Functions ---
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// Crida-la una vegada per frame des del main loop (Director). Substituïx
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// el callback asíncron SDL_AddTimer de la versió antiga — imprescindible
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// per al port a emscripten/SDL_AppIterate.
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inline void JA_Update() {
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if (JA_musicEnabled && current_music && current_music->state == JA_MUSIC_PLAYING) {
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if (fading) {
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int time = SDL_GetTicks();
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if (time > (fade_start_time + fade_duration)) {
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fading = false;
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JA_StopMusic();
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return;
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} else {
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const int time_passed = time - fade_start_time;
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const float percent = (float)time_passed / (float)fade_duration;
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SDL_SetAudioStreamGain(current_music->stream, JA_musicVolume * (1.0f - percent));
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}
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}
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// Streaming: rellenem l'stream fins al low-water-mark i parem si el
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// vorbis s'ha esgotat i no queden loops.
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JA_PumpMusic(current_music);
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if (current_music->times == 0 && SDL_GetAudioStreamAvailable(current_music->stream) == 0) {
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JA_StopMusic();
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}
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}
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if (JA_soundEnabled) {
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for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; ++i)
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if (channels[i].state == JA_CHANNEL_PLAYING) {
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if (channels[i].times != 0) {
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if ((Uint32)SDL_GetAudioStreamAvailable(channels[i].stream) < (channels[i].sound->length / 2)) {
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SDL_PutAudioStreamData(channels[i].stream, channels[i].sound->buffer, channels[i].sound->length);
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if (channels[i].times > 0) channels[i].times--;
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}
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} else {
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if (SDL_GetAudioStreamAvailable(channels[i].stream) == 0) JA_StopChannel(i);
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}
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}
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}
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}
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inline void JA_Init(const int freq, const SDL_AudioFormat format, const int num_channels) {
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#ifdef _DEBUG
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SDL_SetLogPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_DEBUG);
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#endif
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JA_audioSpec = {format, num_channels, freq};
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if (sdlAudioDevice) SDL_CloseAudioDevice(sdlAudioDevice);
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sdlAudioDevice = SDL_OpenAudioDevice(SDL_AUDIO_DEVICE_DEFAULT_PLAYBACK, &JA_audioSpec);
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if (sdlAudioDevice == 0) SDL_Log("Failed to initialize SDL audio!");
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for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; ++i) channels[i].state = JA_CHANNEL_FREE;
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for (int i = 0; i < JA_MAX_GROUPS; ++i) JA_soundVolume[i] = 0.5f;
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}
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inline void JA_Quit() {
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if (sdlAudioDevice) SDL_CloseAudioDevice(sdlAudioDevice);
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sdlAudioDevice = 0;
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}
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// --- Music Functions ---
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inline JA_Music_t* JA_LoadMusic(const Uint8* buffer, Uint32 length) {
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if (!buffer || length == 0) return nullptr;
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// Allocem el JA_Music_t primer per aprofitar el seu `std::vector<Uint8>`
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// com a propietari del OGG comprimit. stb_vorbis guarda un punter
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// persistent al buffer; com que ací no el resize'jem, el .data() és
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// estable durant tot el cicle de vida del music.
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auto* music = new JA_Music_t();
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music->ogg_data.assign(buffer, buffer + length);
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int error = 0;
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music->vorbis = stb_vorbis_open_memory(music->ogg_data.data(),
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static_cast<int>(length), &error, nullptr);
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if (!music->vorbis) {
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SDL_Log("JA_LoadMusic: stb_vorbis_open_memory failed (error %d)", error);
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delete music;
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return nullptr;
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}
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const stb_vorbis_info info = stb_vorbis_get_info(music->vorbis);
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music->spec.channels = info.channels;
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music->spec.freq = static_cast<int>(info.sample_rate);
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music->spec.format = SDL_AUDIO_S16;
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music->state = JA_MUSIC_STOPPED;
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return music;
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}
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// Overload amb filename — els callers l'usen per poder comparar la música
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// en curs amb JA_GetMusicFilename() i no rearrancar-la si ja és la mateixa.
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inline JA_Music_t* JA_LoadMusic(Uint8* buffer, Uint32 length, const char* filename) {
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JA_Music_t* music = JA_LoadMusic(static_cast<const Uint8*>(buffer), length);
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if (music && filename) music->filename = filename;
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return music;
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}
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inline void JA_PlayMusic(JA_Music_t* music, const int loop = -1) {
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if (!JA_musicEnabled || !music || !music->vorbis) return;
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JA_StopMusic();
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current_music = music;
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current_music->state = JA_MUSIC_PLAYING;
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current_music->times = loop;
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// Rebobinem l'stream de vorbis al principi. Cobreix tant play-per-primera-
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// vegada com replays/canvis de track que tornen a la mateixa pista.
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stb_vorbis_seek_start(current_music->vorbis);
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current_music->stream = SDL_CreateAudioStream(¤t_music->spec, &JA_audioSpec);
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if (!current_music->stream) {
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SDL_Log("Failed to create audio stream!");
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current_music->state = JA_MUSIC_STOPPED;
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return;
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}
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SDL_SetAudioStreamGain(current_music->stream, JA_musicVolume);
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// Pre-cargem el buffer abans de bindejar per evitar un underrun inicial.
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JA_PumpMusic(current_music);
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if (!SDL_BindAudioStream(sdlAudioDevice, current_music->stream)) printf("[ERROR] SDL_BindAudioStream failed!\n");
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}
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inline const char* JA_GetMusicFilename(JA_Music_t* music = nullptr) {
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if (!music) music = current_music;
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if (!music || music->filename.empty()) return nullptr;
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return music->filename.c_str();
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}
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inline void JA_PauseMusic() {
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if (!JA_musicEnabled) return;
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if (!current_music || current_music->state != JA_MUSIC_PLAYING) return;
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current_music->state = JA_MUSIC_PAUSED;
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SDL_UnbindAudioStream(current_music->stream);
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}
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inline void JA_ResumeMusic() {
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if (!JA_musicEnabled) return;
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if (!current_music || current_music->state != JA_MUSIC_PAUSED) return;
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current_music->state = JA_MUSIC_PLAYING;
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SDL_BindAudioStream(sdlAudioDevice, current_music->stream);
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}
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inline void JA_StopMusic() {
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if (!current_music || current_music->state == JA_MUSIC_INVALID || current_music->state == JA_MUSIC_STOPPED) return;
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current_music->state = JA_MUSIC_STOPPED;
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if (current_music->stream) {
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SDL_DestroyAudioStream(current_music->stream);
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current_music->stream = nullptr;
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}
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// Deixem el handle de vorbis viu — es tanca en JA_DeleteMusic.
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// Rebobinem perquè un futur JA_PlayMusic comence des del principi.
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if (current_music->vorbis) {
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stb_vorbis_seek_start(current_music->vorbis);
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}
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}
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inline void JA_FadeOutMusic(const int milliseconds) {
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if (!JA_musicEnabled) return;
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if (!current_music || current_music->state == JA_MUSIC_INVALID) return;
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fading = true;
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fade_start_time = SDL_GetTicks();
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fade_duration = milliseconds;
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fade_initial_volume = JA_musicVolume;
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}
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inline JA_Music_state JA_GetMusicState() {
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if (!JA_musicEnabled) return JA_MUSIC_DISABLED;
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if (!current_music) return JA_MUSIC_INVALID;
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return current_music->state;
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}
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inline void JA_DeleteMusic(JA_Music_t* music) {
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if (!music) return;
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if (current_music == music) {
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JA_StopMusic();
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current_music = nullptr;
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}
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if (music->stream) SDL_DestroyAudioStream(music->stream);
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if (music->vorbis) stb_vorbis_close(music->vorbis);
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// ogg_data (std::vector) i filename (std::string) s'alliberen sols
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// al destructor de JA_Music_t.
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delete music;
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}
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inline float JA_SetMusicVolume(float volume) {
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JA_musicVolume = SDL_clamp(volume, 0.0f, 1.0f);
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if (current_music && current_music->stream) {
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SDL_SetAudioStreamGain(current_music->stream, JA_musicVolume);
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}
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return JA_musicVolume;
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}
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inline void JA_SetMusicPosition(float /*value*/) {
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// No implementat amb el backend de streaming.
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}
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inline float JA_GetMusicPosition() {
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return 0.0f;
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}
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inline void JA_EnableMusic(const bool value) {
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if (!value && current_music && (current_music->state == JA_MUSIC_PLAYING)) JA_StopMusic();
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JA_musicEnabled = value;
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}
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// --- Sound Functions ---
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inline JA_Sound_t* JA_NewSound(Uint8* buffer, Uint32 length) {
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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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inline JA_Sound_t* JA_LoadSound(uint8_t* buffer, uint32_t size) {
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JA_Sound_t* sound = new JA_Sound_t();
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if (!SDL_LoadWAV_IO(SDL_IOFromMem(buffer, size), 1, &sound->spec, &sound->buffer, &sound->length)) {
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SDL_Log("Failed to load WAV from memory: %s", SDL_GetError());
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delete sound;
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return nullptr;
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}
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return sound;
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}
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inline JA_Sound_t* JA_LoadSound(const char* filename) {
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JA_Sound_t* sound = new JA_Sound_t();
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if (!SDL_LoadWAV(filename, &sound->spec, &sound->buffer, &sound->length)) {
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SDL_Log("Failed to load WAV file: %s", SDL_GetError());
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delete sound;
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return nullptr;
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}
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return sound;
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}
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inline int JA_PlaySound(JA_Sound_t* sound, const int loop = 0, const int group = 0) {
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if (!JA_soundEnabled || !sound) return -1;
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int channel = 0;
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while (channel < JA_MAX_SIMULTANEOUS_CHANNELS && channels[channel].state != JA_CHANNEL_FREE) { channel++; }
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if (channel == JA_MAX_SIMULTANEOUS_CHANNELS) channel = 0;
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return JA_PlaySoundOnChannel(sound, channel, loop, group);
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}
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inline int JA_PlaySoundOnChannel(JA_Sound_t* sound, const int channel, const int loop, const int group) {
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if (!JA_soundEnabled || !sound) return -1;
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if (channel < 0 || channel >= JA_MAX_SIMULTANEOUS_CHANNELS) return -1;
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JA_StopChannel(channel);
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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].group = group;
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channels[channel].state = JA_CHANNEL_PLAYING;
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channels[channel].stream = SDL_CreateAudioStream(&channels[channel].sound->spec, &JA_audioSpec);
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if (!channels[channel].stream) {
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SDL_Log("Failed to create audio stream for sound!");
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channels[channel].state = JA_CHANNEL_FREE;
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return -1;
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}
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SDL_PutAudioStreamData(channels[channel].stream, channels[channel].sound->buffer, channels[channel].sound->length);
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SDL_SetAudioStreamGain(channels[channel].stream, JA_soundVolume[group]);
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SDL_BindAudioStream(sdlAudioDevice, channels[channel].stream);
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return channel;
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}
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inline void JA_DeleteSound(JA_Sound_t* sound) {
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if (!sound) return;
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for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++) {
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if (channels[i].sound == sound) 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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inline void JA_PauseChannel(const int channel) {
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if (!JA_soundEnabled) return;
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if (channel == -1) {
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for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++)
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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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SDL_UnbindAudioStream(channels[i].stream);
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}
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} else if (channel >= 0 && channel < JA_MAX_SIMULTANEOUS_CHANNELS) {
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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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SDL_UnbindAudioStream(channels[channel].stream);
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}
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}
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}
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inline void JA_ResumeChannel(const int channel) {
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if (!JA_soundEnabled) return;
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if (channel == -1) {
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for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++)
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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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SDL_BindAudioStream(sdlAudioDevice, channels[i].stream);
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}
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} else if (channel >= 0 && channel < JA_MAX_SIMULTANEOUS_CHANNELS) {
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if (channels[channel].state == JA_CHANNEL_PAUSED) {
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|
channels[channel].state = JA_CHANNEL_PLAYING;
|
|
SDL_BindAudioStream(sdlAudioDevice, channels[channel].stream);
|
|
}
|
|
}
|
|
}
|
|
|
|
inline void JA_StopChannel(const int channel) {
|
|
if (channel == -1) {
|
|
for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++) {
|
|
if (channels[i].state != JA_CHANNEL_FREE) {
|
|
if (channels[i].stream) SDL_DestroyAudioStream(channels[i].stream);
|
|
channels[i].stream = nullptr;
|
|
channels[i].state = JA_CHANNEL_FREE;
|
|
channels[i].pos = 0;
|
|
channels[i].sound = nullptr;
|
|
}
|
|
}
|
|
} else if (channel >= 0 && channel < JA_MAX_SIMULTANEOUS_CHANNELS) {
|
|
if (channels[channel].state != JA_CHANNEL_FREE) {
|
|
if (channels[channel].stream) SDL_DestroyAudioStream(channels[channel].stream);
|
|
channels[channel].stream = nullptr;
|
|
channels[channel].state = JA_CHANNEL_FREE;
|
|
channels[channel].pos = 0;
|
|
channels[channel].sound = nullptr;
|
|
}
|
|
}
|
|
}
|
|
|
|
inline 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;
|
|
}
|
|
|
|
inline float JA_SetSoundVolume(float volume, const int group = -1) {
|
|
const float v = SDL_clamp(volume, 0.0f, 1.0f);
|
|
|
|
if (group == -1) {
|
|
for (int i = 0; i < JA_MAX_GROUPS; ++i) {
|
|
JA_soundVolume[i] = v;
|
|
}
|
|
} else if (group >= 0 && group < JA_MAX_GROUPS) {
|
|
JA_soundVolume[group] = v;
|
|
} else {
|
|
return v;
|
|
}
|
|
|
|
// Aplicar volum als canals actius.
|
|
for (int i = 0; i < JA_MAX_SIMULTANEOUS_CHANNELS; i++) {
|
|
if ((channels[i].state == JA_CHANNEL_PLAYING) || (channels[i].state == JA_CHANNEL_PAUSED)) {
|
|
if (group == -1 || channels[i].group == group) {
|
|
if (channels[i].stream) {
|
|
SDL_SetAudioStreamGain(channels[i].stream, JA_soundVolume[channels[i].group]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return v;
|
|
}
|
|
|
|
inline void JA_EnableSound(const bool value) {
|
|
if (!value) {
|
|
JA_StopChannel(-1);
|
|
}
|
|
JA_soundEnabled = value;
|
|
}
|
|
|
|
inline float JA_SetVolume(float volume) {
|
|
float v = JA_SetMusicVolume(volume);
|
|
JA_SetSoundVolume(v, -1);
|
|
return v;
|
|
}
|