implement sokol_audio integration and start working on mixer

first.jai

@@ -127,7 +127,7 @@ Iprof :: #import "Iprof"(IMPORT_MODE = .METAPROGRAM);
     {
         args := string.[
             "emcc",
-            "src/platform_specific/main.c", "dist/main.o", "modules/sokol-jai/sokol/gfx/sokol_gfx_wasm_gl_debug.a", "modules/sokol-jai/sokol/log/sokol_log_wasm_gl_debug.a", "modules/sokol-jai/sokol/time/sokol_time_wasm_gl_debug.a", "modules/sokol-jai/sokol/app/sokol_app_wasm_gl_debug.a", "modules/sokol-jai/sokol/glue/sokol_glue_wasm_gl_debug.a", "modules/sokol-jai/sokol/fetch/sokol_fetch_wasm_gl_debug.a", "modules/sokol-jai/sokol/gl/sokol_gl_wasm_gl_debug.a", "modules/sokol-jai/sokol/fontstash/sokol_fontstash_wasm_gl_debug.a",
+            "src/platform_specific/main.c", "dist/main.o", "modules/sokol-jai/sokol/gfx/sokol_gfx_wasm_gl_release.a", "modules/sokol-jai/sokol/log/sokol_log_wasm_gl_release.a", "modules/sokol-jai/sokol/audio/sokol_audio_wasm_gl_release.a", "modules/sokol-jai/sokol/time/sokol_time_wasm_gl_release.a", "modules/sokol-jai/sokol/app/sokol_app_wasm_gl_release.a", "modules/sokol-jai/sokol/glue/sokol_glue_wasm_gl_release.a", "modules/sokol-jai/sokol/fetch/sokol_fetch_wasm_gl_release.a", "modules/sokol-jai/sokol/gl/sokol_gl_wasm_gl_release.a", "modules/sokol-jai/sokol/fontstash/sokol_fontstash_wasm_gl_release.a",
             "modules/sokol-jai/sokol/stbi/stb_image.a",
             "-o", "dist/index.html",
             "-sSTACK_SIZE=10MB",

modules/sokol-jai/sokol/build_clibs_wasm.sh

@@ -29,6 +29,7 @@ build_lib_wasm_release sokol_debugtext   debugtext/sokol_debugtext_wasm_gl_relea
 build_lib_wasm_release sokol_shape       shape/sokol_shape_wasm_gl_release SOKOL_GLES3
 build_lib_wasm_release sokol_fontstash       fontstash/sokol_fontstash_wasm_gl_release SOKOL_GLES3
 build_lib_wasm_release sokol_fetch       fetch/sokol_fetch_wasm_gl_release SOKOL_GLES3
+build_lib_wasm_release sokol_audio       audio/sokol_audio_wasm_gl_release SOKOL_GLES3
 build_lib_wasm_release sokol_gl          gl/sokol_gl_wasm_gl_release SOKOL_GLES3
 build_lib_wasm_release stb_image            stbi/stb_image SOKOL_GLES3
 
@@ -43,6 +44,7 @@ build_lib_wasm_debug sokol_debugtext     debugtext/sokol_debugtext_wasm_gl_debug
 build_lib_wasm_debug sokol_shape         shape/sokol_shape_wasm_gl_debug SOKOL_GLES3
 build_lib_wasm_debug sokol_fontstash         fontstash/sokol_fontstash_wasm_gl_debug SOKOL_GLES3
 build_lib_wasm_debug sokol_fetch         fetch/sokol_fetch_wasm_gl_debug SOKOL_GLES3
+build_lib_wasm_debug sokol_audio         audio/sokol_audio_wasm_gl_debug SOKOL_GLES3
 build_lib_wasm_debug sokol_gl            gl/sokol_gl_wasm_gl_debug SOKOL_GLES3
 build_lib_wasm_debug stb_image            stbi/stb_image SOKOL_GLES3
 

src/audio/audio.jai

@@ -0,0 +1,30 @@
+#load "backend.jai";
+#load "load.jai";
+
+Mixer_Bus :: enum {
+    MUSIC;
+    SOUND_EFFECT;
+    DIALOGUE;
+}
+
+Mixer :: struct {
+    
+}
+
+mixer_get_samples :: (buffer: *float, mixer: *Mixer, sampleCount: s32, channelCount: s32) {
+    
+}
+
+audio_init :: () {
+    load_wav_file();
+}
+
+audio_cleanup :: () {
+    saudio_shutdown();
+}
+
+mono_track : [..]float;
+
+cur_sample : int = 0;
+
+audio_samples : []s16;

src/audio/backend.jai

@@ -0,0 +1,10 @@
+sokol_audio_callback :: (buffer: *float, num_frames: s32, num_channels: s32) #c_call {
+    push_context,defer_pop default_context;
+
+    if mono_track.count < 1 then return;
+
+    for i : 0..num_frames-1 {
+        buffer[i] = mono_track[cur_sample] * 0.1;
+        cur_sample += 1;
+    }
+}

src/audio/load.jai

@@ -0,0 +1,19 @@
+Wav :: #import "Wav_File";
+
+audio_info : Wav.Waveformatex;
+
+load_wav_file :: () {
+    audio := load_string_from_pack("./game/resources/sound/music/monoco.wav");    
+    format, samples, success := Wav.get_wav_header(audio);
+    if !success print("Failed to load wav file!!!!!\n");
+    audio_info = format;
+    audio_samples.data = cast(*s16)samples.data;
+    audio_samples.count = samples.count / 2;
+    print("Format: %\n", format.wBitsPerSample);
+    for sample, i:  audio_samples {
+        if i % 2 == 0 {
+            array_add(*mono_track, cast(float)sample / 32768.0);
+        }
+    }
+    print("Converted % samples", mono_track.count);
+}

src/main.jai

@@ -27,6 +27,7 @@ stbi   :: #import "stb_image";
 #load "ray.jai";
 #load "world.jai";
 #load "utils.jai";
+#load "audio/audio.jai";
     
 #if USE_SAMPLE_GAME {
     #load "../sample_game/game.jai";
@@ -87,6 +88,10 @@ init :: () {
     sfetch_setup(*(sfetch_desc_t.{
         logger = .{ func = slog_func },
     }));
+    saudio_setup(*(saudio_desc.{
+        logger = .{ func = slog_func },
+        stream_cb = sokol_audio_callback,
+    }));
     stm_setup();
     state.dpi_scale = sapp_dpi_scale();
     atlas_dim := round_pow2(512.0 * state.dpi_scale);
@@ -131,6 +136,8 @@ init_after_asset_pack :: () {
     load_color_lut_images();
     load_post_process_from_pack();
 
+    audio_init();
+
     // We want to do this last.
     game_init();
 
@@ -200,6 +207,7 @@ frame :: () {
 }
 
 cleanup :: () {
+    audio_cleanup();
     sg_shutdown();
 }
 

src/platform_specific/common.jai

@@ -7,6 +7,7 @@
 #import,dir "../../modules/sokol-jai/sokol/log"(DEBUG = RELEASE_BUILD);
 #import,dir "../../modules/sokol-jai/sokol/time"(DEBUG = RELEASE_BUILD);
 #import,dir "../../modules/sokol-jai/sokol/fetch"(DEBUG = RELEASE_BUILD);
+#import,dir "../../modules/sokol-jai/sokol/audio"(DEBUG = RELEASE_BUILD);
 
 #load "../main.jai";