[PATCH v17 6/8] dmime: Implement IDirectMusicTrack_Play for MIDI tracks.

[Yuxuan Shui]

From: Yuxuan Shui

---
 dlls/dmime/midi.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 52 insertions(+), 1 deletion(-)

diff --git a/dlls/dmime/midi.c b/dlls/dmime/midi.c
index 729b1174f2f..b8ec5fd5da2 100644
--- a/dlls/dmime/midi.c
+++ b/dlls/dmime/midi.c
@@ -181,11 +181,62 @@ static HRESULT WINAPI midi_sequence_track_Play(IDirectMusicTrack8 *iface, void *
         IDirectMusicPerformance *performance, IDirectMusicSegmentState *segment_state, DWORD track_id)
 {
     struct midi_sequence_track *This = impl_from_IDirectMusicTrack8(iface);
+    struct list *cursor;
+    IDirectMusicGraph *graph;
+    HRESULT hr;
+    UINT i;
+    ULONG ticks = 0;
+    MUSIC_TIME music_time;

FIXME("(%p, %p, %ld, %ld, %ld, %#lx, %p, %p, %ld): stub\n", This, state_data, start_time,
             end_time, time_offset, segment_flags, performance, segment_state, track_id);

-    return E_NOTIMPL;
+    if (segment_flags) FIXME("segment_flags %#lx not implemented\n", segment_flags);
+    if (segment_state) FIXME("segment_state %p not implemented\n", segment_state);
+
+    if (FAILED(hr = IDirectMusicPerformance_QueryInterface(performance, &IID_IDirectMusicGraph, (void **)&graph)))
+        return hr;
+
+    cursor = list_head(&This->events);
+    for (i = 0; SUCCEEDED(hr) && i < This->event_count; i++, cursor = list_next(&This->events, cursor))
+    {
+        struct event *item = LIST_ENTRY(cursor, struct event, entry);
+        DMUS_MIDI_PMSG *msg;
+
+        ticks += item->deltaTime;
+        if (This->ticks_per_quarter_note)
+            music_time = (ULONGLONG)ticks * DMUS_PPQ / This->ticks_per_quarter_note;
+        else
+            /* This is the "fake" tempo case, ticks and MUSIC_TIME should mean
+             * the same thing. */
+            music_time = ticks;
+
+        if (music_time < start_time || music_time >= end_time) continue;
+
+        if (item->status == 0xff || item->status == 0xf0 || item->status == 0xf7) continue;
+
+        if (FAILED(hr = IDirectMusicPerformance_AllocPMsg(performance, sizeof(*msg), (DMUS_PMSG **)&msg)))
+            break;
+
+        msg->dwFlags = DMUS_PMSGF_MUSICTIME;
+        msg->mtTime = music_time;
+        msg->dwPChannel = item->status & 0xf;
+        msg->dwVirtualTrackID = track_id;
+        msg->dwType = DMUS_PMSGT_MIDI;
+        msg->dwGroupID = 1;
+        msg->bStatus = item->status;
+        msg->bByte1 = item->data.fixed.byte[0];
+        msg->bByte2 = item->data.fixed.byte[1];
+
+        if (FAILED(hr = IDirectMusicGraph_StampPMsg(graph, (DMUS_PMSG *)msg)) ||
+                FAILED(hr = IDirectMusicPerformance_SendPMsg(performance, (DMUS_PMSG *)msg)))
+        {
+            IDirectMusicPerformance_FreePMsg(performance, (DMUS_PMSG *)msg);
+            break;
+        }
+    }
+
+    return SUCCEEDED(hr) ? S_OK : hr;
 }

static HRESULT WINAPI midi_sequence_track_GetParam(IDirectMusicTrack8 *iface, REFGUID type,