[PATCH] xaudio2: Partially implement XA2SRC_SetChannelVolumes().

[Masanori Kakura]

Fixes https://bugs.winehq.org/show_bug.cgi?id=44277

Thanks to Fabian Maurer and Andrew Eikum.

Signed-off-by: Masanori Kakura 
---
 dlls/xaudio2_7/tests/xaudio2.c | 65 ++++++++++++++++++++++++++++++++++++++++++
 dlls/xaudio2_7/xaudio_dll.c    | 26 +++++++++++++++++
 2 files changed, 91 insertions(+)

diff --git a/dlls/xaudio2_7/tests/xaudio2.c b/dlls/xaudio2_7/tests/xaudio2.c
index ff402f87c4..1927c1942b 100644
--- a/dlls/xaudio2_7/tests/xaudio2.c
+++ b/dlls/xaudio2_7/tests/xaudio2.c
@@ -1165,6 +1165,70 @@ static void test_xapo_creation(void)
     test_xapo_creation_modern("xaudio2_8.dll");
 }

+static void test_setchannelvolumes(IXAudio2 *xa)
+{
+    HRESULT hr;
+    IXAudio2MasteringVoice *master;
+    IXAudio2SourceVoice *src_2ch, *src_8ch;
+    WAVEFORMATEX fmt_2ch, fmt_8ch;
+    float volumes[] = {0.1f, 0.2f, 0.3f, 0.4f, 0.5f, 0.6f, 0.7f, 0.8f};
+
+    if(xaudio27)
+        hr = IXAudio27_CreateMasteringVoice((IXAudio27*)xa, &master, 8, 44100, 0, 0, NULL);
+    else
+        hr = IXAudio2_CreateMasteringVoice(xa, &master, 8, 44100, 0, NULL, NULL, AudioCategory_GameEffects);
+    ok(hr == S_OK, "CreateMasteringVoice failed: %08x\n", hr);
+
+    fmt_2ch.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
+    fmt_2ch.nChannels = 2;
+    fmt_2ch.nSamplesPerSec = 44100;
+    fmt_2ch.wBitsPerSample = 32;
+    fmt_2ch.nBlockAlign = fmt_2ch.nChannels * fmt_2ch.wBitsPerSample / 8;
+    fmt_2ch.nAvgBytesPerSec = fmt_2ch.nSamplesPerSec * fmt_2ch.nBlockAlign;
+    fmt_2ch.cbSize = 0;
+
+    fmt_8ch.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
+    fmt_8ch.nChannels = 8;
+    fmt_8ch.nSamplesPerSec = 44100;
+    fmt_8ch.wBitsPerSample = 32;
+    fmt_8ch.nBlockAlign = fmt_8ch.nChannels * fmt_8ch.wBitsPerSample / 8;
+    fmt_8ch.nAvgBytesPerSec = fmt_8ch.nSamplesPerSec * fmt_8ch.nBlockAlign;
+    fmt_8ch.cbSize = 0;
+
+    XA2CALL(CreateSourceVoice, &src_2ch, &fmt_2ch, 0, 1.f, NULL, NULL, NULL);
+    ok(hr == S_OK, "CreateSourceVoice failed: %08x\n", hr);
+
+    XA2CALL(CreateSourceVoice, &src_8ch, &fmt_8ch, 0, 1.f, NULL, NULL, NULL);
+    ok(hr == S_OK, "CreateSourceVoice failed: %08x\n", hr);
+
+    /* the number of channels must be the same as the number of channels on the source voice */
+    hr = IXAudio2SourceVoice_SetChannelVolumes(src_2ch, 2, volumes, XAUDIO2_COMMIT_NOW);
+    ok(hr == S_OK, "SetChannelVolumes failed: %08x\n", hr);
+
+    hr = IXAudio2SourceVoice_SetChannelVolumes(src_8ch, 8, volumes, XAUDIO2_COMMIT_NOW);
+    ok(hr == S_OK, "SetChannelVolumes failed: %08x\n", hr);
+
+    hr = IXAudio2SourceVoice_SetChannelVolumes(src_2ch, 1, volumes, XAUDIO2_COMMIT_NOW);
+    ok(hr == XAUDIO2_E_INVALID_CALL, "SetChannelVolumes should have failed: %08x\n", hr);
+
+    hr = IXAudio2SourceVoice_SetChannelVolumes(src_8ch, 2, volumes, XAUDIO2_COMMIT_NOW);
+    ok(hr == XAUDIO2_E_INVALID_CALL, "SetChannelVolumes should have failed: %08x\n", hr);
+
+    /* volumes must not be NULL */
+    hr = IXAudio2SourceVoice_SetChannelVolumes(src_2ch, 2, NULL, XAUDIO2_COMMIT_NOW);
+    ok(hr == XAUDIO2_E_INVALID_CALL, "SetChannelVolumes should have failed: %08x\n", hr);
+
+    if(xaudio27){
+        IXAudio27SourceVoice_DestroyVoice((IXAudio27SourceVoice*)src_2ch);
+        IXAudio27SourceVoice_DestroyVoice((IXAudio27SourceVoice*)src_8ch);
+    }else{
+        IXAudio2SourceVoice_DestroyVoice(src_2ch);
+        IXAudio2SourceVoice_DestroyVoice(src_8ch);
+    }
+
+    IXAudio2MasteringVoice_DestroyVoice(master);
+}
+
 static UINT32 check_has_devices(IXAudio2 *xa)
 {
     HRESULT hr;
@@ -1237,6 +1301,7 @@ START_TEST(xaudio2)
             test_looping(xa);
             test_submix(xa);
             test_flush(xa);
+            test_setchannelvolumes(xa);
         }else
             skip("No audio devices available\n");

diff --git a/dlls/xaudio2_7/xaudio_dll.c b/dlls/xaudio2_7/xaudio_dll.c
index bc5cf1cae9..5c2aad956d 100644
--- a/dlls/xaudio2_7/xaudio_dll.c
+++ b/dlls/xaudio2_7/xaudio_dll.c
@@ -337,7 +337,33 @@ static HRESULT WINAPI XA2SRC_SetChannelVolumes(IXAudio2SourceVoice *iface,
         UINT32 Channels, const float *pVolumes, UINT32 OperationSet)
 {
     XA2SourceImpl *This = impl_from_IXAudio2SourceVoice(iface);
+    ALfloat al_gain;
+    UINT32 i;
+    BOOL same_volumes_given = TRUE;
+
     TRACE("%p, %u, %p, 0x%x\n", This, Channels, pVolumes, OperationSet);
+
+    if(Channels != This->fmt->nChannels || !pVolumes)
+        return COMPAT_E_INVALID_CALL;
+
+    al_gain = *pVolumes;
+
+    /* check whether all volumes are the same */
+    for(i = 1; i < Channels; ++i){
+        if(al_gain != *(pVolumes + i)){
+            same_volumes_given = FALSE;
+            break;
+        }
+    }
+    if(!same_volumes_given){
+        WARN("Different volumes for channels unsupported, setting the highest volume.\n");
+        for(; i < Channels; ++i)
+            al_gain = max(al_gain, *(pVolumes + i));
+    }
+
+    palcSetThreadContext(This->xa2->al_ctx);
+    alSourcef(This->al_src, AL_GAIN, al_gain);
+
     return S_OK;
 }