[PATCH v4 12/12] windows.media.speech: Store recorded audio in a temporary ringbuffer.

[Bernhard Kölbl]

From: Bernhard Kölbl

Signed-off-by: Bernhard Kölbl 
---
 dlls/windows.media.speech/recognizer.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/dlls/windows.media.speech/recognizer.c b/dlls/windows.media.speech/recognizer.c
index 98f999d1276..5112bca7d1c 100644
--- a/dlls/windows.media.speech/recognizer.c
+++ b/dlls/windows.media.speech/recognizer.c
@@ -190,15 +190,17 @@ static DWORD CALLBACK session_worker_thread_cb( void *args )
 {
     ISpeechContinuousRecognitionSession *iface = args;
     struct session *impl = impl_from_ISpeechContinuousRecognitionSession(iface);
-    UINT32 frame_count, frames_available;
+    UINT32 frame_count, frames_available, tmp_buf_offset = 0;
     BOOLEAN running = TRUE, paused = FALSE;
+    BYTE *audio_buf, *tmp_buf;
     DWORD flags, status;
     HANDLE events[2];
-    BYTE *audio_buf;

IAudioClient_Start(impl->audio_client);
     IAudioClient_GetBufferSize(impl->audio_client, &frame_count);

+    tmp_buf = malloc(sizeof(*tmp_buf) * frame_count * 2); /* multiplied with 2 because our audio frames have 16bit depth. */
+
     while (running)
     {
         BOOLEAN old_paused = paused;
@@ -228,11 +230,17 @@ static DWORD CALLBACK session_worker_thread_cb( void *args )
         }
         else if (status == 1) /* audio_buf_event signaled */
         {
-            while (IAudioCaptureClient_GetBuffer(impl->capture_client, &audio_buf, &frames_available, &flags, NULL, NULL) == S_OK)
+            while (IAudioCaptureClient_GetBuffer(impl->capture_client, &audio_buf, &frames_available, &flags, NULL, NULL) == S_OK && tmp_buf_offset < (frame_count * 2))
             {
-                /* TODO: Send mic data to recognizer and handle results. */
+                memcpy(tmp_buf + tmp_buf_offset, audio_buf, frames_available * 2);
+                tmp_buf_offset += (frames_available * 2); /* multiplied with 2 because our audio frames have 16bit depth. */
+    
                 IAudioCaptureClient_ReleaseBuffer(impl->capture_client, frames_available);
             }
+
+            /* TODO: Send mic data to recognizer and handle results. */
+
+            tmp_buf_offset = 0;
         }
         else 
         {
@@ -242,6 +250,7 @@ static DWORD CALLBACK session_worker_thread_cb( void *args )
     }

IAudioClient_Stop(impl->audio_client);
+    free(tmp_buf);

return 0;
 }