backporting changes for tulip web into amy

Makefile

@@ -32,7 +32,7 @@ EMSCRIPTEN_OPTIONS = -s WASM=1 \
 -s ALLOW_MEMORY_GROWTH=1 \
 -sMODULARIZE -s 'EXPORT_NAME="amyModule"' \
 -s EXPORTED_RUNTIME_METHODS="['cwrap','ccall']" \
--s EXPORTED_FUNCTIONS="['_amy_play_message', '_amy_reset_sysclock', '_amy_live_start', '_amy_start', '_malloc', '_free']" 
+-s EXPORTED_FUNCTIONS="['_amy_play_message', '_amy_reset_sysclock', '_amy_live_start', '_amy_start', '_sequencer_ticks', '_malloc', '_free']"
 
 PYTHON = python3
 
@@ -43,12 +43,10 @@ all: default
 
 SOURCES = src/algorithms.c src/amy.c src/envelope.c src/examples.c \
 	src/filters.c src/oscillators.c src/pcm.c src/partials.c src/custom.c \
-	src/delay.c src/log2_exp2.c src/patches.c src/transfer.c src/sequencer.c
+	src/delay.c src/log2_exp2.c src/patches.c src/transfer.c src/sequencer.c \
+	src/libminiaudio-audio.c
 
-OBJECTS = $(patsubst %.c, %.o, src/algorithms.c src/amy.c src/envelope.c \
-	src/delay.c src/partials.c src/custom.c src/patches.c \
-	src/examples.c src/filters.c src/oscillators.c src/pcm.c src/log2_exp2.c \
-	src/libminiaudio-audio.c src/transfer.c src/sequencer.c)
+OBJECTS = $(patsubst %.c, %.o, $(SOURCES)) 
 
 HEADERS = $(wildcard src/*.h) src/amy_config.h
 HEADERS_BUILD := $(filter-out src/patches.h,$(HEADERS))
@@ -85,9 +83,8 @@ timing: amy-module
 	cat /tmp/timings.txt | grep FILTER_PROCESS: | sed -e 's/us//' | sort -n | awk ' { a[i++]=$$4; } END { print a[int(i/2)]; }'
 	cat /tmp/timings.txt | grep PARAMETRIC_EQ_PROCESS: | sed -e 's/us//' | sort -n | awk ' { a[i++]=$$4; } END { print a[int(i/2)]; }'
 
-
-web: $(TARGET)
-	 emcc $(SOURCES) src/libminiaudio-audio.c $(EMSCRIPTEN_OPTIONS) -O3 -o docs/amy.js
+docs/amy.js: $(TARGET)
+	 emcc $(SOURCES) $(EMSCRIPTEN_OPTIONS) -O3 -o $@
 
 clean:
 	-rm -f src/*.o

src/CMakeLists.txt

@@ -22,6 +22,7 @@ if (TARGET tinyusb_device)
             algorithms.c
             amy.c
             transfer.c
+            sequencer.c
             delay.c
             envelope.c
             custom.c

src/amy.c

@@ -126,7 +126,8 @@ int16_t amy_in_block[AMY_BLOCK_SIZE*AMY_NCHANS];
 // Optional render hook that's called per oscillator during rendering
 uint8_t (*amy_external_render_hook)(uint16_t, SAMPLE*, uint16_t len ) = NULL;
 
-#ifndef malloc_caps
+#ifndef MALLOC_CAPS_DEFINED
+#define MALLOC_CAPS_DEFINED
 void * malloc_caps(uint32_t size, uint32_t flags) {
 #ifdef ESP_PLATFORM
     //fprintf(stderr, "allocing size %ld flags %ld\n", size, flags);
@@ -139,7 +140,6 @@ void * malloc_caps(uint32_t size, uint32_t flags) {
 #endif
 
 
-
 // block -- what gets sent to the dac -- -32768...32767 (int16 le)
 output_sample_type * block;
 uint32_t total_samples;

src/libminiaudio-audio.c

@@ -37,13 +37,14 @@ pthread_t amy_live_thread;
 
 #ifdef __EMSCRIPTEN__
 #include <emscripten.h>
-
+extern void sequencer_check_and_fill();
 void main_loop__em()
 {
+    // We call repeatedly here to fill the sequencer, for webassembly (no threads)
+    sequencer_check_and_fill();
 }
 #endif
 
-
 void amy_print_devices() {
     ma_context context;
     if (ma_context_init(NULL, 0, NULL, &context) != MA_SUCCESS) {
@@ -71,9 +72,7 @@ void amy_print_devices() {
 
     ma_context_uninit(&context);
 }
-#ifdef __EMSCRIPTEN__
-//#include "console.h"
-#endif
+
 
 // I've seen frame counts as big as 1440, I think *8 is enough room (2048)
 #define OUTPUT_RING_FRAMES (AMY_BLOCK_SIZE*8)

src/sequencer.c

@@ -30,6 +30,13 @@ esp_timer_handle_t periodic_timer;
 #include <pthread.h>
 #endif
 
+
+#ifdef __EMSCRIPTEN__
+#include <emscripten.h>
+#endif
+
+uint32_t sequencer_ticks() { return sequencer_tick_count; }
+
 void sequencer_reset() {
     // Remove all events
     sequence_entry_ll_t **entry_ll_ptr = &sequence_entry_ll_start; // Start pointing to the root node.
@@ -83,7 +90,7 @@ uint8_t sequencer_add_event(struct event e, uint32_t tick, uint32_t period, uint
 }
 
 
-static void sequencer_check_and_fill() {
+void sequencer_check_and_fill() {
     // The while is in case the timer fires later than a tick; (on esp this would be due to SPI or wifi ops)
     while(amy_sysclock()  >= (next_amy_tick_us/1000)) {
         sequencer_tick_count++;
@@ -119,7 +126,12 @@ static void sequencer_check_and_fill() {
                 entry_ll_ptr = &((*entry_ll_ptr)->next); // Update to point to the next field in the preceding list node.
             }
         }
-
+        // call the right hook:
+#ifdef __EMSCRIPTEN__
+        EM_ASM({
+            amy_sequencer_js_hook($0);
+        }, sequencer_tick_count);
+#endif
         if(amy_external_sequencer_hook!=NULL) {
             amy_external_sequencer_hook(sequencer_tick_count);
         }

src/sequencer.h

@@ -9,7 +9,7 @@ extern uint32_t sequencer_tick_count ;
 extern uint64_t next_amy_tick_us ;
 extern uint32_t us_per_tick ;
 
-
+uint32_t sequencer_ticks();
 void sequencer_init();
 void sequencer_recompute();
 uint8_t sequencer_add_event(struct event e, uint32_t tick, uint32_t period, uint32_t tag);