Anton Baskanov : winegstreamer: Allocate at least 3 buffers for MPEG audio in quartz parser.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 9add23322a9ff6a95a34130e06af95d47dc762e0
URL:    https://gitlab.winehq.org/wine/wine/-/commit/9add23322a9ff6a95a34130e06af95d...

Author: Anton Baskanov <baskanov(a)gmail.com>
Date:   Fri Nov  4 19:12:36 2022 +0700

winegstreamer: Allocate at least 3 buffers for MPEG audio in quartz parser.

---

 dlls/winegstreamer/quartz_parser.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/dlls/winegstreamer/quartz_parser.c b/dlls/winegstreamer/quartz_parser.c
index 87185312585..2a7845be737 100644
--- a/dlls/winegstreamer/quartz_parser.c
+++ b/dlls/winegstreamer/quartz_parser.c
@@ -1649,6 +1649,7 @@ static HRESULT WINAPI GSTOutPin_DecideBufferSize(struct strmbase_source *iface,
         IMemAllocator *allocator, ALLOCATOR_PROPERTIES *props)
 {
     struct parser_source *pin = impl_source_from_IPin(&iface->pin.IPin_iface);
+    unsigned int buffer_count = 1;
     unsigned int buffer_size = 16384;
     ALLOCATOR_PROPERTIES ret_props;
 
@@ -1664,11 +1665,18 @@ static HRESULT WINAPI GSTOutPin_DecideBufferSize(struct strmbase_source *iface,
         WAVEFORMATEX *format = (WAVEFORMATEX *)pin->pin.pin.mt.pbFormat;
         buffer_size = format->nAvgBytesPerSec;
     }
+    else if (IsEqualGUID(&pin->pin.pin.mt.subtype, &MEDIASUBTYPE_MPEG1AudioPayload)
+            || IsEqualGUID(&pin->pin.pin.mt.subtype, &MEDIASUBTYPE_MP3))
+    {
+        /* mpg123audiodec requires at least 3 buffers as it will keep
+         * references to the last 2 samples. */
+        buffer_count = 3;
+    }
 
     /* We do need to drop any buffers that might have been sent with the old
      * caps, but this will be handled in parser_init_stream(). */
 
-    props->cBuffers = max(props->cBuffers, 1);
+    props->cBuffers = max(props->cBuffers, buffer_count);
     props->cbBuffer = max(props->cbBuffer, buffer_size);
     props->cbAlign = max(props->cbAlign, 1);
     return IMemAllocator_SetProperties(allocator, props, &ret_props);