# Stage 2.2

- Move Timer to core
- Use Timer for app_time
- Fix Deltatime Bug in App
- Add HwInfo to lib3ds (stolen from hbloader 2 pd-rewrite port)
- Add GetSystemLanguage to lib3ds
- Add Net Header for pd-net (still need to find a way to make this working)
- Add base Decoder and Player Headers for pd-sound
- Add Mp3 Decoder (useless and untested yet)
- Add GetDataDirectory to App
- Add InitFLag to App for HwInfo
- Actually write the Timer class
- Rework the UI7 Theme API to use SmartCtor
- UI7::Menu::JoinAlign: Use a loop to determinate max width for centering a group
- Add some Doctumentation around UI7::Menu

source/sound/mp3.cpp

@@ -0,0 +1,72 @@
+/*
+MIT License
+Copyright (c) 2024 - 2025 René Amthor (tobid7)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+ */
+
+#include <pd/sound/mp3.hpp>
+
+namespace PD {
+namespace Music {
+int Mp3Decoder::Init(const std::string& path) {
+  int ret = 0;
+  int encoding = 0;
+  if ((ret = mpg123_init() != MPG123_OK)) {
+    return ret;
+  }
+  if ((handle = mpg123_new(nullptr, &ret)) == nullptr) {
+    return ret;
+  }
+  int cnls = 0;
+  long _rate = 0;
+  if (mpg123_open(handle, path.c_str()) != MPG123_OK ||
+      mpg123_getformat(handle, &_rate, &cnls, &encoding)) {
+    return ret;
+  }
+  rate = _rate;
+  channels = cnls;
+  mpg123_format_none(handle);
+  mpg123_format(handle, rate, channels, encoding);
+  buf_size = mpg123_outblock(handle) * 16;
+  return ret;
+}
+
+void Mp3Decoder::Deinit() {
+  mpg123_close(handle);
+  mpg123_delete(handle);
+  mpg123_exit();
+}
+
+u32 Mp3Decoder::GetSampleRate() { return rate; }
+u8 Mp3Decoder::GetChannels() { return channels; }
+u64 Mp3Decoder::Decode(u16* buf_address) {
+  size_t done = 0;
+  mpg123_read(handle, buf_address, buf_size, &done);
+  return done / sizeof(u16);
+}
+size_t Mp3Decoder::GetFileSamples() {
+  off_t len = mpg123_length(handle);
+  if (len != MPG123_ERR) {
+    return len * size_t(channels);
+  }
+  return -1;  // NotExist
+}
+}  // namespace Music
+}  // namespace PD