Fix copy/paste errors.

extras/miniaudio_libopus.h

 /*
-This implements a data source that decodes Vorbis streams via libopus + libopusfile
+This implements a data source that decodes Opus streams via libopus + libopusfile
 
 This object can be plugged into any `ma_data_source_*()` API and can also be used as a custom
 decoding backend. See the custom_decoder example.
@@ -30,14 +30,14 @@ typedef struct
 #endif
 } ma_libopus;
 
-MA_API ma_result ma_libopus_init(ma_read_proc onRead, ma_seek_proc onSeek, ma_tell_proc onTell, void* pReadSeekTellUserData, const ma_decoding_backend_config* pConfig, const ma_allocation_callbacks* pAllocationCallbacks, ma_libopus* pVorbis);
-MA_API ma_result ma_libopus_init_file(const char* pFilePath, const ma_decoding_backend_config* pConfig, const ma_allocation_callbacks* pAllocationCallbacks, ma_libopus* pVorbis);
-MA_API void ma_libopus_uninit(ma_libopus* pVorbis, const ma_allocation_callbacks* pAllocationCallbacks);
-MA_API ma_result ma_libopus_read_pcm_frames(ma_libopus* pVorbis, void* pFramesOut, ma_uint64 frameCount, ma_uint64* pFramesRead);
-MA_API ma_result ma_libopus_seek_to_pcm_frame(ma_libopus* pVorbis, ma_uint64 frameIndex);
-MA_API ma_result ma_libopus_get_data_format(ma_libopus* pVorbis, ma_format* pFormat, ma_uint32* pChannels, ma_uint32* pSampleRate, ma_channel* pChannelMap, size_t channelMapCap);
-MA_API ma_result ma_libopus_get_cursor_in_pcm_frames(ma_libopus* pVorbis, ma_uint64* pCursor);
-MA_API ma_result ma_libopus_get_length_in_pcm_frames(ma_libopus* pVorbis, ma_uint64* pLength);
+MA_API ma_result ma_libopus_init(ma_read_proc onRead, ma_seek_proc onSeek, ma_tell_proc onTell, void* pReadSeekTellUserData, const ma_decoding_backend_config* pConfig, const ma_allocation_callbacks* pAllocationCallbacks, ma_libopus* pOpus);
+MA_API ma_result ma_libopus_init_file(const char* pFilePath, const ma_decoding_backend_config* pConfig, const ma_allocation_callbacks* pAllocationCallbacks, ma_libopus* pOpus);
+MA_API void ma_libopus_uninit(ma_libopus* pOpus, const ma_allocation_callbacks* pAllocationCallbacks);
+MA_API ma_result ma_libopus_read_pcm_frames(ma_libopus* pOpus, void* pFramesOut, ma_uint64 frameCount, ma_uint64* pFramesRead);
+MA_API ma_result ma_libopus_seek_to_pcm_frame(ma_libopus* pOpus, ma_uint64 frameIndex);
+MA_API ma_result ma_libopus_get_data_format(ma_libopus* pOpus, ma_format* pFormat, ma_uint32* pChannels, ma_uint32* pSampleRate, ma_channel* pChannelMap, size_t channelMapCap);
+MA_API ma_result ma_libopus_get_cursor_in_pcm_frames(ma_libopus* pOpus, ma_uint64* pCursor);
+MA_API ma_result ma_libopus_get_length_in_pcm_frames(ma_libopus* pOpus, ma_uint64* pLength);
 
 #ifdef __cplusplus
 }
@@ -194,7 +194,7 @@ MA_API ma_result ma_libopus_init(ma_read_proc onRead, ma_seek_proc onSeek, ma_te
         int libopusResult;
         OpusFileCallbacks libopusCallbacks;
 
-        /* We can now initialize the vorbis decoder. This must be done after we've set up the callbacks. */
+        /* We can now initialize the Opus decoder. This must be done after we've set up the callbacks. */
         libopusCallbacks.read  = ma_libopus_of_callback__read;
         libopusCallbacks.seek  = ma_libopus_of_callback__seek;
         libopusCallbacks.close = NULL;