1 files changed, 131 insertions, 0 deletions
diff --git a/audio/audio_win_int.c b/audio/audio_win_int.c
new file mode 100644
index 000000000..5ea8157df
--- /dev/null
+++ b/audio/audio_win_int.c
@@ -0,0 +1,131 @@
+/* public domain */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+
+#define AUDIO_CAP "win-int"
+#include <windows.h>
+#include <mmreg.h>
+#include <mmsystem.h>
+
+#include "audio.h"
+#include "audio_int.h"
+#include "audio_win_int.h"
+
+int waveformat_from_audio_settings (WAVEFORMATEX *wfx,
+                                    struct audsettings *as)
+{
+    memset (wfx, 0, sizeof (*wfx));
+
+    wfx->nChannels = as->nchannels;
+    wfx->nSamplesPerSec = as->freq;
+    wfx->nAvgBytesPerSec = as->freq << (as->nchannels == 2);
+    wfx->nBlockAlign = 1 << (as->nchannels == 2);
+    wfx->cbSize = 0;
+
+    switch (as->fmt) {
+    case AUDIO_FORMAT_S8:
+    case AUDIO_FORMAT_U8:
+        wfx->wFormatTag = WAVE_FORMAT_PCM;
+        wfx->wBitsPerSample = 8;
+        break;
+
+    case AUDIO_FORMAT_S16:
+    case AUDIO_FORMAT_U16:
+        wfx->wFormatTag = WAVE_FORMAT_PCM;
+        wfx->wBitsPerSample = 16;
+        wfx->nAvgBytesPerSec <<= 1;
+        wfx->nBlockAlign <<= 1;
+        break;
+
+    case AUDIO_FORMAT_S32:
+    case AUDIO_FORMAT_U32:
+        wfx->wFormatTag = WAVE_FORMAT_PCM;
+        wfx->wBitsPerSample = 32;
+        wfx->nAvgBytesPerSec <<= 2;
+        wfx->nBlockAlign <<= 2;
+        break;
+
+    case AUDIO_FORMAT_F32:
+        wfx->wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
+        wfx->wBitsPerSample = 32;
+        wfx->nAvgBytesPerSec <<= 2;
+        wfx->nBlockAlign <<= 2;
+        break;
+
+    default:
+        dolog("Internal logic error: Bad audio format %d\n", as->fmt);
+        return -1;
+    }
+
+    return 0;
+}
+
+int waveformat_to_audio_settings (WAVEFORMATEX *wfx,
+                                  struct audsettings *as)
+{
+    if (!wfx->nSamplesPerSec) {
+        dolog ("Invalid wave format, frequency is zero\n");
+        return -1;
+    }
+    as->freq = wfx->nSamplesPerSec;
+
+    switch (wfx->nChannels) {
+    case 1:
+        as->nchannels = 1;
+        break;
+
+    case 2:
+        as->nchannels = 2;
+        break;
+
+    default:
+        dolog (
+            "Invalid wave format, number of channels is not 1 or 2, but %d\n",
+            wfx->nChannels
+            );
+        return -1;
+    }
+
+    if (wfx->wFormatTag == WAVE_FORMAT_PCM) {
+        switch (wfx->wBitsPerSample) {
+        case 8:
+            as->fmt = AUDIO_FORMAT_U8;
+            break;
+
+        case 16:
+            as->fmt = AUDIO_FORMAT_S16;
+            break;
+
+        case 32:
+            as->fmt = AUDIO_FORMAT_S32;
+            break;
+
+        default:
+            dolog("Invalid PCM wave format, bits per sample is not "
+                  "8, 16 or 32, but %d\n",
+                  wfx->wBitsPerSample);
+            return -1;
+        }
+    } else if (wfx->wFormatTag == WAVE_FORMAT_IEEE_FLOAT) {
+        switch (wfx->wBitsPerSample) {
+        case 32:
+            as->fmt = AUDIO_FORMAT_F32;
+            break;
+
+        default:
+            dolog("Invalid IEEE_FLOAT wave format, bits per sample is not "
+                  "32, but %d\n",
+                  wfx->wBitsPerSample);
+            return -1;
+        }
+    } else {
+        dolog("Invalid wave format, tag is not PCM and not IEEE_FLOAT, "
+              "but %d\n",
+              wfx->wFormatTag);
+        return -1;
+    }
+
+    return 0;
+}
+