diff --git a/dlls/winepulse.drv/mmdevdrv.c b/dlls/winepulse.drv/mmdevdrv.c
index 654126e6dfe..7e2877f184e 100644
--- a/dlls/winepulse.drv/mmdevdrv.c
+++ b/dlls/winepulse.drv/mmdevdrv.c
@@ -1200,48 +1200,19 @@ static HRESULT WINAPI AudioCaptureClient_GetBuffer(IAudioCaptureClient *iface,
         UINT64 *qpcpos)
 {
     ACImpl *This = impl_from_IAudioCaptureClient(iface);
-    HRESULT hr;
-    ACPacket *packet;
 
     TRACE("(%p)->(%p, %p, %p, %p, %p)\n", This, data, frames, flags,
             devpos, qpcpos);
 
     if (!data)
        return E_POINTER;
-
     *data = NULL;
-
     if (!frames || !flags)
         return E_POINTER;
+    if (!This->pulse_stream)
+        return AUDCLNT_E_NOT_INITIALIZED;
 
-    pulse->lock();
-    hr = pulse_stream_valid(This);
-    if (FAILED(hr) || This->pulse_stream->locked) {
-        pulse->unlock();
-        return FAILED(hr) ? hr : AUDCLNT_E_OUT_OF_ORDER;
-    }
-
-    ACImpl_GetCapturePad(This, NULL);
-    if ((packet = This->pulse_stream->locked_ptr)) {
-        *frames = This->pulse_stream->period_bytes / pa_frame_size(&This->pulse_stream->ss);
-        *flags = 0;
-        if (packet->discont)
-            *flags |= AUDCLNT_BUFFERFLAGS_DATA_DISCONTINUITY;
-        if (devpos) {
-            if (packet->discont)
-                *devpos = (This->pulse_stream->clock_written + This->pulse_stream->period_bytes) / pa_frame_size(&This->pulse_stream->ss);
-            else
-                *devpos = This->pulse_stream->clock_written / pa_frame_size(&This->pulse_stream->ss);
-        }
-        if (qpcpos)
-            *qpcpos = packet->qpcpos;
-        *data = packet->data;
-    }
-    else
-        *frames = 0;
-    This->pulse_stream->locked = *frames;
-    pulse->unlock();
-    return *frames ? S_OK : AUDCLNT_S_BUFFER_EMPTY;
+    return pulse->get_capture_buffer(This->pulse_stream, data, frames, flags, devpos, qpcpos);
 }
 
 static HRESULT WINAPI AudioCaptureClient_ReleaseBuffer(
diff --git a/dlls/winepulse.drv/pulse.c b/dlls/winepulse.drv/pulse.c
index a17bce283f6..15173647836 100644
--- a/dlls/winepulse.drv/pulse.c
+++ b/dlls/winepulse.drv/pulse.c
@@ -1549,6 +1549,48 @@ static HRESULT WINAPI pulse_release_render_buffer(struct pulse_stream *stream, U
     return S_OK;
 }
 
+static HRESULT WINAPI pulse_get_capture_buffer(struct pulse_stream *stream, BYTE **data,
+        UINT32 *frames, DWORD *flags, UINT64 *devpos, UINT64 *qpcpos)
+{
+    ACPacket *packet;
+
+    pulse_lock();
+    if (!pulse_stream_valid(stream))
+    {
+        pulse_unlock();
+        return AUDCLNT_E_DEVICE_INVALIDATED;
+    }
+    if (stream->locked)
+    {
+        pulse_unlock();
+        return AUDCLNT_E_OUT_OF_ORDER;
+    }
+
+    pulse_capture_padding(stream);
+    if ((packet = stream->locked_ptr))
+    {
+        *frames = stream->period_bytes / pa_frame_size(&stream->ss);
+        *flags = 0;
+        if (packet->discont)
+            *flags |= AUDCLNT_BUFFERFLAGS_DATA_DISCONTINUITY;
+        if (devpos)
+        {
+            if (packet->discont)
+                *devpos = (stream->clock_written + stream->period_bytes) / pa_frame_size(&stream->ss);
+            else
+                *devpos = stream->clock_written / pa_frame_size(&stream->ss);
+        }
+        if (qpcpos)
+            *qpcpos = packet->qpcpos;
+        *data = packet->data;
+    }
+    else
+        *frames = 0;
+    stream->locked = *frames;
+    pulse_unlock();
+    return *frames ? S_OK : AUDCLNT_S_BUFFER_EMPTY;
+}
+
 static HRESULT WINAPI pulse_get_buffer_size(struct pulse_stream *stream, UINT32 *out)
 {
     HRESULT hr = S_OK;
@@ -1644,6 +1686,7 @@ static const struct unix_funcs unix_funcs =
     pulse_timer_loop,
     pulse_get_render_buffer,
     pulse_release_render_buffer,
+    pulse_get_capture_buffer,
     pulse_get_buffer_size,
     pulse_get_latency,
     pulse_get_current_padding,
diff --git a/dlls/winepulse.drv/unixlib.h b/dlls/winepulse.drv/unixlib.h
index 6017d8052e8..ad6dd2da1f5 100644
--- a/dlls/winepulse.drv/unixlib.h
+++ b/dlls/winepulse.drv/unixlib.h
@@ -84,6 +84,8 @@ struct unix_funcs
     HRESULT (WINAPI *get_render_buffer)(struct pulse_stream *stream, UINT32 frames, BYTE **data);
     HRESULT (WINAPI *release_render_buffer)(struct pulse_stream *stream, UINT32 written_frames,
                                             DWORD flags);
+    HRESULT (WINAPI *get_capture_buffer)(struct pulse_stream *stream, BYTE **data, UINT32 *frames,
+                                         DWORD *flags, UINT64 *devpos, UINT64 *qpcpos);
     HRESULT (WINAPI *get_buffer_size)(struct pulse_stream *stream, UINT32 *out);
     HRESULT (WINAPI *get_latency)(struct pulse_stream *stream, REFERENCE_TIME *latency);
     HRESULT (WINAPI *get_current_padding)(struct pulse_stream *stream, UINT32 *out);