[PATCH 15/16] Introduce IMFSample -> GstBuffer converter.

[Derek Lesho]

Signed-off-by: Derek Lesho 
---
 dlls/winegstreamer/gst_private.h |  1 +
 dlls/winegstreamer/mfplat.c      | 74 ++++++++++++++++++++++++++++++++
 2 files changed, 75 insertions(+)

diff --git a/dlls/winegstreamer/gst_private.h b/dlls/winegstreamer/gst_private.h
index e594ed1419..489b543738 100644
--- a/dlls/winegstreamer/gst_private.h
+++ b/dlls/winegstreamer/gst_private.h
@@ -58,6 +58,7 @@ extern HRESULT mfplat_get_class_object(REFCLSID rclsid, REFIID riid, void **obj)
 IMFMediaType* media_type_from_caps(GstCaps *caps);
 GstCaps *caps_from_media_type(IMFMediaType *type);
 IMFSample* mf_sample_from_gst_buffer(GstBuffer *in);
+GstBuffer* gst_buffer_from_mf_sample(IMFSample *in);

enum source_type
 {
diff --git a/dlls/winegstreamer/mfplat.c b/dlls/winegstreamer/mfplat.c
index aa042a59d3..5fbb331c89 100644
--- a/dlls/winegstreamer/mfplat.c
+++ b/dlls/winegstreamer/mfplat.c
@@ -1057,3 +1057,77 @@ IMFSample* mf_sample_from_gst_buffer(GstBuffer *gst_buffer)
     IMFSample_Release(out);
     return NULL;
 }
+
+GstBuffer* gst_buffer_from_mf_sample(IMFSample *mf_sample)
+{
+    GstBuffer *out = gst_buffer_new();
+    IMFMediaBuffer *mf_buffer = NULL;
+    LONGLONG duration, time;
+    DWORD buffer_count;
+    HRESULT hr;
+
+    if (FAILED(hr = IMFSample_GetSampleDuration(mf_sample, &duration)))
+        goto fail;
+
+    if (FAILED(hr = IMFSample_GetSampleTime(mf_sample, &time)))
+        goto fail;
+
+    GST_BUFFER_DURATION(out) = duration;
+    GST_BUFFER_PTS(out) = time * 100;
+
+    if (FAILED(hr = IMFSample_GetBufferCount(mf_sample, &buffer_count)))
+        goto fail;
+
+    for (unsigned int i = 0; i < buffer_count; i++)
+    {
+        DWORD buffer_max_size, buffer_size;
+        GstMapInfo map_info;
+        GstMemory *memory;
+        BYTE *buf_data;
+
+        if (FAILED(hr = IMFSample_GetBufferByIndex(mf_sample, i, &mf_buffer)))
+            goto fail;
+
+        if (FAILED(hr = IMFMediaBuffer_GetMaxLength(mf_buffer, &buffer_max_size)))
+            goto fail;
+
+        if (FAILED(hr = IMFMediaBuffer_GetCurrentLength(mf_buffer, &buffer_size)))
+            goto fail;
+
+        memory = gst_allocator_alloc(NULL, buffer_size, NULL);
+        gst_memory_resize(memory, 0, buffer_size);
+
+        if (!(gst_memory_map(memory, &map_info, GST_MAP_WRITE)))
+        {
+            hr = E_FAIL;
+            goto fail;
+        }
+
+        if (FAILED(hr = IMFMediaBuffer_Lock(mf_buffer, &buf_data, NULL, NULL)))
+            goto fail;
+
+        memcpy(map_info.data, buf_data, buffer_size);
+
+        if (FAILED(hr = IMFMediaBuffer_Unlock(mf_buffer)))
+            goto fail;
+
+        if (FAILED(hr = IMFMediaBuffer_SetCurrentLength(mf_buffer, buffer_size)))
+            goto fail;
+
+        gst_memory_unmap(memory, &map_info);
+
+        gst_buffer_append_memory(out, memory);
+
+        IMFMediaBuffer_Release(mf_buffer);
+        mf_buffer = NULL;
+    }
+
+    return out;
+
+    fail:
+    ERR("Failed to copy IMFSample to GstBuffer, hr = %#x\n", hr);
+    if (mf_buffer)
+        IMFMediaBuffer_Release(mf_buffer);
+    gst_buffer_unref(out);
+    return NULL;
+}