audio and video

firmware/src/gfx_decoder.cpp

@@ -46,3 +46,14 @@ bool gfx_decoder_loadNextFrame() {
   free(buffer);
   return true;
 }
+
+unsigned long frameLastChangedAt = 0;
+
+bool gfx_decoder_handleLoop() {
+  auto now = millis();
+  if (now - frameLastChangedAt > MS_PER_FRAME) {
+    frameLastChangedAt = now;
+    return gfx_decoder_loadNextFrame();
+  }
+  return true;
+}

firmware/src/gfx_decoder.h

@@ -9,5 +9,6 @@ extern uint16_t frameCount;
 extern uint8_t gfxFrameBuffer[2048];
 
 bool gfx_decoder_loadNextFrame();
+bool gfx_decoder_handleLoop();
 
 #endif

firmware/src/leds.cpp

@@ -20,10 +20,6 @@ inline void outputEnable(uint8_t pin, bool enable) {
   gpio_put(pin, !enable);
 }
 
-uint16_t frameIndex = 0;
-uint16_t lastRenderedFrameIndex = 0;
-unsigned long frameLastChangedAt;
-
 // we have 4-bit color depth, so 16 levels of brightness
 // we go from phase 0 to phase 3
 uint8_t brightnessPhase = 0;
@@ -61,10 +57,6 @@ void leds_init() {
   clearShiftReg(ROW_SRCLK, ROW_SRCLR);
   pulsePin(ROW_RCLK);
 
-  // clear frames
-  frameIndex = 0;
-  frameLastChangedAt = millis();
-
   /*
   // launch core1
   // NOTE: For some reason, without delay, core1 doesn't start?

firmware/src/main.cpp

@@ -23,10 +23,7 @@ void setup() {
 
   setupSD();
 
-  // // sd_getAudio();
-  // sd_getGfx();
-
-  // return;
+  sd_loadAudio();
 
   if (!sd_loadGfxFrameLengths()) {
     Serial.println("Failed to load gfx frame lengths");
@@ -40,26 +37,24 @@ void setup() {
 }
 
 void loop() {
-  if (Serial.available() > 0) {
-    char c = Serial.read();
-    if (c == 'p') {
-      Serial.println("Paused. Press any key to continue.");
-      leds_disable();
-      while (Serial.available() == 0) {
-        Serial.read();
-        delay(50);
-      }
-      Serial.println("Continuing...");
-    }
-  }
+  sd_loadNextAudio();
 
+  // if (Serial.available() > 0) {
+  //   char c = Serial.read();
+  //   if (c == 'p') {
+  //     Serial.println("Paused. Press any key to continue.");
+  //     leds_disable();
+  //     while (Serial.available() == 0) {
+  //       Serial.read();
+  //       delay(50);
+  //     }
+  //     Serial.println("Continuing...");
+  //   }
+  // }
 
-  if (!gfx_decoder_loadNextFrame()) {
+  if (!gfx_decoder_handleLoop()) {
     Serial.println("Failed to load frame...");
   }
 
   leds_render();
-  leds_render();
-  leds_render();
-  leds_render();
 }

firmware/src/sd.cpp

@@ -156,54 +156,53 @@ void printSDStats(RP2040_SdVolume volume) {
   Serial.println((float)volumesize / 1024.0);
 }
 
-File file;
+File audioFile;
 
-void sd_getAudio() {
+void sd_loadAudio() {
   if (!SD.exists("/badapple/audio.bin")) {
     Serial.println("Audio not found :(");
     return;
   }
 
-  if (file) {
-    file.close();
+  if (audioFile) {
+    audioFile.close();
   }
 
-  file = SD.open("/badapple/audio.bin", FILE_READ);
+  audioFile = SD.open("/badapple/audio.bin", FILE_READ);
   Serial.println("Audio file opened");
 
   audio_stop();
 
   // load two buffers' worth of audio
-  if (file.read(&wav_buffer_0, BUFFER_LEN) < BUFFER_LEN) {
+  if (audioFile.read(&wav_buffer_0, BUFFER_LEN) < BUFFER_LEN) {
     Serial.println("Could not read first sample");
     return;
   }
 
-  if (file.read(&wav_buffer_1, BUFFER_LEN) < BUFFER_LEN) {
+  if (audioFile.read(&wav_buffer_1, BUFFER_LEN) < BUFFER_LEN) {
     Serial.println("Could not read second sample");
     return;
   }
 
   audio_start();
+}
 
-  while (true) {
-    if (!next_buffer_requested) {
-      delay(50);
-      continue;
-    }
-    next_buffer_requested = false;
+void sd_loadNextAudio() {
+  if (!next_buffer_requested) {
+    return;
+  }
+  next_buffer_requested = false;
 
-    auto next_buffer = wav_buffer1_active ? &wav_buffer_0 : &wav_buffer_1;
-    auto bytesRead = file.read(next_buffer, BUFFER_LEN);
+  auto next_buffer = wav_buffer1_active ? &wav_buffer_0 : &wav_buffer_1;
+  auto bytesRead = audioFile.read(next_buffer, BUFFER_LEN);
 
-    if (bytesRead < BUFFER_LEN) {
-      Serial.println("End of audio file");
-      file.seek(0);
-    } else {
-      Serial.print("Read ");
-      Serial.print(bytesRead);
-      Serial.println(" bytes from audio file");
-    }
+  if (bytesRead < BUFFER_LEN) {
+    Serial.println("End of audio file, rewinding...");
+    audioFile.seek(0);
+  } else {
+    Serial.print("Read ");
+    Serial.print(bytesRead);
+    Serial.println(" bytes from audio file");
   }
 }
 

firmware/src/sd.h

@@ -5,7 +5,8 @@ void setupSD();
 
 bool isSDCardInserted();
 
-void sd_getAudio();
+void sd_loadAudio();
+void sd_loadNextAudio();
 bool sd_loadGfxFrameLengths();
 bool sd_loadGfxBlob();
 int32_t sd_loadNextFrame();