import esp audio lib

2021-08-27 16:42:43 +02:00
parent 489174fdc8
commit 3d437de0e6
567 changed files with 267532 additions and 38 deletions
--- a/FW/leo_muziekdoos_sam51/lib/ESP8266Audio/src/AudioOutputSerialWAV.cpp
+++ b/FW/leo_muziekdoos_sam51/lib/ESP8266Audio/src/AudioOutputSerialWAV.cpp
@@ -0,0 +1,78 @@
+/*
+  AudioOutputSerialWAV
+  Writes a mostly correct WAV file to the serial port
+  
+  Copyright (C) 2017  Earle F. Philhower, III
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "AudioOutputSerialWAV.h"
+
+static const uint8_t wavHeaderTemplate[] PROGMEM = { // Hardcoded simple WAV header with 0xffffffff lengths all around
+    0x52, 0x49, 0x46, 0x46, 0xff, 0xff, 0xff, 0xff, 0x57, 0x41, 0x56, 0x45,
+    0x66, 0x6d, 0x74, 0x20, 0x10, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02, 0x00, 0x22, 0x56, 0x00, 0x00, 0x88, 0x58, 0x01, 0x00, 0x04, 0x00, 0x10, 0x00,
+    0x64, 0x61, 0x74, 0x61, 0xff, 0xff, 0xff, 0xff };
+
+bool AudioOutputSerialWAV::begin()
+{
+  uint8_t wavHeader[sizeof(wavHeaderTemplate)];
+  memcpy_P(wavHeader, wavHeaderTemplate, sizeof(wavHeaderTemplate));
+  wavHeader[22] = channels & 0xff;
+  wavHeader[23] = 0;
+  wavHeader[24] = hertz & 0xff;
+  wavHeader[25] = (hertz >> 8) & 0xff;
+  wavHeader[26] = (hertz >> 16) & 0xff;
+  wavHeader[27] = (hertz >> 24) & 0xff;
+  int byteRate = hertz * bps * channels / 8;
+  wavHeader[28] = byteRate & 0xff;
+  wavHeader[29] = (byteRate >> 8) & 0xff;
+  wavHeader[30] = (byteRate >> 16) & 0xff;
+  wavHeader[31] = (byteRate >> 24) & 0xff;
+  wavHeader[32] = channels * bps / 8;
+  wavHeader[33] = 0;
+  wavHeader[34] = bps;
+  wavHeader[35] = 0;
+  Serial.write(wavHeader, sizeof(wavHeader));
+  count = 0;
+  return true;
+}
+
+bool AudioOutputSerialWAV::ConsumeSample(int16_t sample[2])
+{
+  if (++count == 200) {
+    count = 0;
+    return false;
+  }
+  for (int i=0; i<channels; i++) {
+    if (bps == 8) {
+      uint8_t l = sample[i] & 0xff;
+      Serial.write(l);
+    } else {
+      uint8_t l = sample[i] & 0xff;
+      uint8_t h = (sample[i] >> 8) & 0xff;
+      Serial.write(l);
+      Serial.write(h);
+    }
+  }
+  return true;
+}
+
+
+bool AudioOutputSerialWAV::stop()
+{
+  audioLogger->printf_P(PSTR("\n\n\nEOF\n\n\n"));
+  return true;
+}
+