AUDIO: Finish implementing the AudioContext

src/Audio.cc

@@ -32,11 +32,30 @@ AudioContext::AudioContext(const QString &path)
         AVCodec *streamCodec      = avcodec_find_decoder(params->codec_id);
         if (streamCodec && streamCodec->type == AVMEDIA_TYPE_AUDIO) {
             audioStreamIndexes.push_back(i);
-            audioCodecs.insert(i, std::make_shared<Stream>(formatPtr, itFormat));
+            audioStreams.insert(i, std::make_shared<Stream>(formatPtr, itFormat));
         }
     }
 }
 
+// Get the number of audio streams in the audio context
+int
+AudioContext::getStreamCount() const noexcept
+{
+    return audioStreamIndexes.size();
+}
+
+// Get a specific audio stream, try to lock the weak pointer. if the index was
+// not present the used_count will be 0 and you won't be able to lock it.
+AudioContext::StreamWeakPtr
+AudioContext::getStream(uint index) const noexcept
+{
+    if (QMap<uint, StreamPtr>::const_iterator found = audioStreams.find(index);
+        found != audioStreams.end()) {
+        return StreamWeakPtr{ *found };
+    }
+    return StreamWeakPtr{ spareNullSreamPtr };
+}
+
 // AudioContext::Stream class implementation
 
 // Constructor, need an AVFormat and an AVStream

src/Audio.hh

@@ -116,10 +116,10 @@ public:
     ~AudioContext() noexcept = default;
 
     int getStreamCount() const noexcept;
-    StreamWeakPtr getStream(int) const noexcept;
+    StreamWeakPtr getStream(uint) const noexcept;
 
 private:
-    /* Regarding the format */
+    // Regarding the format
     static inline constexpr auto avFormatContextDeleter =
         [](AVFormatContext *ptr) noexcept -> void {
         if (ptr)
@@ -128,10 +128,14 @@ private:
     using AVFormatContextPtr = std::unique_ptr<AVFormatContext, decltype(avFormatContextDeleter)>;
     AVFormatContextPtr format{ avformat_alloc_context() };
 
-    /* Usefull information */
+    // Usefull information
     QString filePath;
     QVector<uint> audioStreamIndexes{};
-    QMap<uint, StreamPtr> audioCodecs{};
+    QMap<uint, StreamPtr> audioStreams{};
+
+    // Spare always null shared pointer, to be used when the audioStream[i] was
+    // not found.
+    StreamPtr spareNullSreamPtr{ nullptr };
 };
 }