[PATCH v3 1/4] dmusic: Reuse downloaded waves.

[Anton Baskanov]

From: Anton Baskanov

Some soundfonts contain multiple zones at both preset and instrument
levels, which leads to creation of multiple regions that reference the
same wave. Reusing already downloaded waves prevents running out of
memory when loading FluidR3_GM.sf2.
---
 dlls/dmusic/instrument.c | 62 +++++++++++++++++++++++++++++-----------
 1 file changed, 45 insertions(+), 17 deletions(-)

diff --git a/dlls/dmusic/instrument.c b/dlls/dmusic/instrument.c
index 8311c690877..a524ab2c627 100644
--- a/dlls/dmusic/instrument.c
+++ b/dlls/dmusic/instrument.c
@@ -26,6 +26,14 @@ WINE_DEFAULT_DEBUG_CHANNEL(dmusic);

static const GUID IID_IDirectMusicInstrumentPRIVATE = { 0xbcb20080, 0xa40c, 0x11d1, { 0x86, 0xbc, 0x00, 0xc0, 0x4f, 0xbf, 0x8f, 0xef } };

+struct downloaded_wave
+{
+    struct list entry;
+
+    DWORD index;
+    DWORD id;
+};
+
 #define CONN_SRC_CC2  0x0082
 #define CONN_SRC_RPN0 0x0100

@@ -76,6 +84,7 @@ struct instrument
     INSTHEADER header;
     IDirectMusicDownload *download;
     struct collection *collection;
+    struct list downloaded_waves;
     struct list articulations;
     struct list regions;
 };
@@ -237,6 +246,7 @@ static HRESULT instrument_create(struct collection *collection, IDirectMusicInst
     instrument->IDirectMusicDownloadedInstrument_iface.lpVtbl = &downloaded_instrument_vtbl;
     instrument->ref = 1;
     collection_internal_addref((instrument->collection = collection));
+    list_init(&instrument->downloaded_waves);
     list_init(&instrument->articulations);
     list_init(&instrument->regions);

@@ -742,6 +752,7 @@ HRESULT instrument_download_to_port(IDirectMusicInstrument *iface, IDirectMusicP
         IDirectMusicDownloadedInstrument **downloaded)
 {
     struct instrument *This = impl_from_IDirectMusicInstrument(iface);
+    struct downloaded_wave *downloaded_wave;
     struct articulation *articulation;
     struct download_buffer *buffer;
     IDirectMusicDownload *download;
@@ -824,12 +835,34 @@ HRESULT instrument_download_to_port(IDirectMusicInstrument *iface, IDirectMusicP
             dmus_region->WSMP = region->wave_sample;
             dmus_region->WLOOP[0] = region->wave_loop;

-            if (SUCCEEDED(hr = collection_get_wave(This->collection, region->wave_link.ulTableIndex, &wave)))
+            LIST_FOR_EACH_ENTRY(downloaded_wave, &This->downloaded_waves, struct downloaded_wave, entry)
             {
-                hr = wave_download_to_port(wave, port, &dmus_region->WaveLink.ulTableIndex);
-                IDirectMusicObject_Release(wave);
+                if (downloaded_wave->index == region->wave_link.ulTableIndex)
+                    break;
             }
-            if (FAILED(hr)) goto failed;
+            if (&downloaded_wave->entry == &This->downloaded_waves)
+            {
+                downloaded_wave = calloc(1, sizeof(struct downloaded_wave));
+                if (!downloaded_wave)
+                {
+                    hr = E_OUTOFMEMORY;
+                    goto failed;
+                }
+                downloaded_wave->index = region->wave_link.ulTableIndex;
+                if (SUCCEEDED(hr = collection_get_wave(This->collection, region->wave_link.ulTableIndex, &wave)))
+                {
+                    hr = wave_download_to_port(wave, port, &downloaded_wave->id);
+                    IDirectMusicObject_Release(wave);
+                }
+                if (FAILED(hr))
+                {
+                    free(downloaded_wave);
+                    goto failed;
+                }
+                list_add_tail(&This->downloaded_waves, &downloaded_wave->entry);
+            }
+
+            dmus_region->WaveLink.ulTableIndex = downloaded_wave->id;

write_articulation_download(&region->articulations, buffer->offsets, &ptr, index,
                     &dmus_region->ulRegionArtIdx, &index);
@@ -854,35 +887,30 @@ failed:
 HRESULT instrument_unload_from_port(IDirectMusicDownloadedInstrument *iface, IDirectMusicPortDownload *port)
 {
     struct instrument *This = impl_from_IDirectMusicDownloadedInstrument(iface);
-    struct download_buffer *buffer;
-    DWORD size;
     HRESULT hr;

if (!This->download) return DMUS_E_NOT_DOWNLOADED_TO_PORT;

if (FAILED(hr = IDirectMusicPortDownload_Unload(port, This->download)))
         WARN("Failed to unload instrument download buffer, hr %#lx\n", hr);
-    else if (SUCCEEDED(hr = IDirectMusicDownload_GetBuffer(This->download, (void **)&buffer, &size)))
+    else
     {
+        struct downloaded_wave *downloaded_wave;
         IDirectMusicDownload *wave_download;
-        DMUS_INSTRUMENT *instrument;
-        BYTE *ptr = (BYTE *)buffer;
-        DMUS_REGION *region;
-        UINT index;
+        void *next;

-        instrument = (DMUS_INSTRUMENT *)(ptr + buffer->offsets[0]);
-        for (index = instrument->ulFirstRegionIdx; index; index = region->ulNextRegionIdx)
+        LIST_FOR_EACH_ENTRY_SAFE(downloaded_wave, next, &This->downloaded_waves, struct downloaded_wave, entry)
         {
-            region = (DMUS_REGION *)(ptr + buffer->offsets[index]);
-
-            if (FAILED(hr = IDirectMusicPortDownload_GetBuffer(port, region->WaveLink.ulTableIndex, &wave_download)))
-                WARN("Failed to get wave download with id %#lx, hr %#lx\n", region->WaveLink.ulTableIndex, hr);
+            if (FAILED(hr = IDirectMusicPortDownload_GetBuffer(port, downloaded_wave->id, &wave_download)))
+                WARN("Failed to get wave download with id %#lx, hr %#lx\n", downloaded_wave->id, hr);
             else
             {
                 if (FAILED(hr = IDirectMusicPortDownload_Unload(port, wave_download)))
                     WARN("Failed to unload wave download buffer, hr %#lx\n", hr);
                 IDirectMusicDownload_Release(wave_download);
             }
+            list_remove(&downloaded_wave->entry);
+            free(downloaded_wave);
         }
     }