import esp audio lib

FW/leo_muziekdoos_sam51/lib/ESP8266Audio/src/AudioFileSourcePROGMEM.cpp

@@ -0,0 +1,99 @@
+/*
+  AudioFileSourcePROGMEM
+  Store a "file" as a PROGMEM array and use it as audio source data
+  
+  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 "AudioFileSourcePROGMEM.h"
+
+AudioFileSourcePROGMEM::AudioFileSourcePROGMEM()
+{
+  opened = false;
+  progmemData = NULL;
+  progmemLen = 0;
+  filePointer = 0;
+}
+
+AudioFileSourcePROGMEM::AudioFileSourcePROGMEM(const void *data, uint32_t len)
+{
+  open(data, len);
+}
+
+AudioFileSourcePROGMEM::~AudioFileSourcePROGMEM()
+{
+}
+
+bool AudioFileSourcePROGMEM::open(const void *data, uint32_t len)
+{
+  if (!data || !len) return false;
+
+  opened = true;
+  progmemData = data;
+  progmemLen = len;
+  filePointer = 0;
+  return true;
+}
+
+uint32_t AudioFileSourcePROGMEM::getSize()
+{
+  if (!opened) return 0;
+  return progmemLen;
+}
+
+bool AudioFileSourcePROGMEM::isOpen()
+{
+  return opened;
+}
+
+bool AudioFileSourcePROGMEM::close()
+{
+  opened = false;
+  progmemData = NULL;
+  progmemLen = 0;
+  filePointer = 0;
+  return true;
+}  
+
+bool AudioFileSourcePROGMEM::seek(int32_t pos, int dir)
+{
+  if (!opened) return false;
+  uint32_t newPtr;
+  switch (dir) {
+    case SEEK_SET: newPtr = pos; break;
+    case SEEK_CUR: newPtr = filePointer + pos; break;
+    case SEEK_END: newPtr = progmemLen - pos; break;
+    default: return false;
+  }
+  if (newPtr > progmemLen) return false;
+  filePointer = newPtr;
+  return true;
+}
+
+uint32_t AudioFileSourcePROGMEM::read(void *data, uint32_t len)
+{
+  if (!opened) return 0;
+  if (filePointer >= progmemLen) return 0;
+
+  uint32_t toRead = progmemLen - filePointer;
+  if (toRead > len) toRead = len;
+
+  memcpy_P(data, reinterpret_cast<const uint8_t*>(progmemData)+filePointer, toRead);
+  filePointer += toRead;
+  return toRead;
+}
+
+