calculate length for CBR mp3 files

3 files changed, 8 insertions, 2 deletions

diff --git a/src/audio/include/audio_source.hpp b/src/audio/include/audio_source.hpp
index a54cb260..68145f5b 100644
--- a/src/audio/include/audio_source.hpp
+++ b/src/audio/include/audio_source.hpp
@@ -28,6 +28,8 @@ class TaggedStream : public codecs::IStream {
 
   auto CurrentPosition() -> int64_t override;
 
+  auto Size() -> std::optional<int64_t> override;
+
   auto SetPreambleFinished() -> void override;
 
  private:
diff --git a/src/audio/include/fatfs_source.hpp b/src/audio/include/fatfs_source.hpp
index e4187d60..45ab34c6 100644
--- a/src/audio/include/fatfs_source.hpp
+++ b/src/audio/include/fatfs_source.hpp
@@ -34,6 +34,8 @@ class FatfsSource : public codecs::IStream {
 
   auto CurrentPosition() -> int64_t override;
 
+  auto Size() -> std::optional<int64_t> override;
+
   FatfsSource(const FatfsSource&) = delete;
   FatfsSource& operator=(const FatfsSource&) = delete;
 
@@ -41,4 +43,4 @@ class FatfsSource : public codecs::IStream {
   std::unique_ptr<FIL> file_;
 };
 
-}  // namespace audio
\ No newline at end of file
+}  // namespace audio
diff --git a/src/audio/include/readahead_source.hpp b/src/audio/include/readahead_source.hpp
index bbc0da12..58076350 100644
--- a/src/audio/include/readahead_source.hpp
+++ b/src/audio/include/readahead_source.hpp
@@ -38,6 +38,8 @@ class ReadaheadSource : public codecs::IStream {
 
   auto CurrentPosition() -> int64_t override;
 
+  auto Size() -> std::optional<int64_t> override;
+
   auto SetPreambleFinished() -> void override;
 
   ReadaheadSource(const ReadaheadSource&) = delete;
@@ -55,4 +57,4 @@ class ReadaheadSource : public codecs::IStream {
   int64_t tell_;
 };
 
-}  // namespace audio
\ No newline at end of file
+}  // namespace audio