wavcapture: Use stdio instead of QEMUFile

QEMUFile * is only intended for migration nowadays.  Using it for
anything else just adds pain and a layer of buffers for no good
reason.
Signed-off-by: NJuan Quintela <quintela@redhat.com>
CC: malc <av1474@comtv.ru>
Signed-off-by: Nmalc <av1474@comtv.ru>

audio/wavcapture.c

@@ -3,7 +3,7 @@
 #include "audio.h"
 
 typedef struct {
-    QEMUFile *f;
+    FILE *f;
     int bytes;
     char *path;
     int freq;
@@ -35,17 +35,37 @@ static void wav_destroy (void *opaque)
     uint8_t dlen[4];
     uint32_t datalen = wav->bytes;
     uint32_t rifflen = datalen + 36;
+    Monitor *mon = cur_mon;
 
     if (wav->f) {
         le_store (rlen, rifflen, 4);
         le_store (dlen, datalen, 4);
 
-        qemu_fseek (wav->f, 4, SEEK_SET);
-        qemu_put_buffer (wav->f, rlen, 4);
-
-        qemu_fseek (wav->f, 32, SEEK_CUR);
-        qemu_put_buffer (wav->f, dlen, 4);
-        qemu_fclose (wav->f);
+        if (fseek (wav->f, 4, SEEK_SET)) {
+            monitor_printf (mon, "wav_destroy: rlen fseek failed\nReason: %s\n",
+                            strerror (errno));
+            goto doclose;
+        }
+        if (fwrite (rlen, 4, 1, wav->f) != 1) {
+            monitor_printf (mon, "wav_destroy: rlen fwrite failed\nReason %s\n",
+                            strerror (errno));
+            goto doclose;
+        }
+        if (fseek (wav->f, 32, SEEK_CUR)) {
+            monitor_printf (mon, "wav_destroy: dlen fseek failed\nReason %s\n",
+                            strerror (errno));
+            goto doclose;
+        }
+        if (fwrite (dlen, 1, 4, wav->f) != 4) {
+            monitor_printf (mon, "wav_destroy: dlen fwrite failed\nReason %s\n",
+                            strerror (errno));
+            goto doclose;
+        }
+    doclose:
+        if (fclose (wav->f)) {
+            fprintf (stderr, "wav_destroy: fclose failed: %s",
+                     strerror (errno));
+        }
     }
 
     g_free (wav->path);
@@ -55,7 +75,10 @@ static void wav_capture (void *opaque, void *buf, int size)
 {
     WAVState *wav = opaque;
 
-    qemu_put_buffer (wav->f, buf, size);
+    if (fwrite (buf, size, 1, wav->f) != 1) {
+        monitor_printf (cur_mon, "wav_capture: fwrite error\nReason: %s",
+                        strerror (errno));
+    }
     wav->bytes += size;
 }
 
@@ -71,7 +94,7 @@ static void wav_capture_info (void *opaque)
     WAVState *wav = opaque;
     char *path = wav->path;
 
-    monitor_printf(cur_mon, "Capturing audio(%d,%d,%d) to %s: %d bytes\n",
+    monitor_printf (cur_mon, "Capturing audio(%d,%d,%d) to %s: %d bytes\n",
                     wav->freq, wav->bits, wav->nchannels,
                     path ? path : "<not available>", wav->bytes);
 }
@@ -98,12 +121,12 @@ int wav_start_capture (CaptureState *s, const char *path, int freq,
     CaptureVoiceOut *cap;
 
     if (bits != 8 && bits != 16) {
-        monitor_printf(mon, "incorrect bit count %d, must be 8 or 16\n", bits);
+        monitor_printf (mon, "incorrect bit count %d, must be 8 or 16\n", bits);
         return -1;
     }
 
     if (nchannels != 1 && nchannels != 2) {
-        monitor_printf(mon, "incorrect channel count %d, must be 1 or 2\n",
+        monitor_printf (mon, "incorrect channel count %d, must be 1 or 2\n",
                         nchannels);
         return -1;
     }
@@ -130,9 +153,9 @@ int wav_start_capture (CaptureState *s, const char *path, int freq,
     le_store (hdr + 28, freq << shift, 4);
     le_store (hdr + 32, 1 << shift, 2);
 
-    wav->f = qemu_fopen (path, "wb");
+    wav->f = fopen (path, "wb");
     if (!wav->f) {
-        monitor_printf(mon, "Failed to open wave file `%s'\nReason: %s\n",
+        monitor_printf (mon, "Failed to open wave file `%s'\nReason: %s\n",
                         path, strerror (errno));
         g_free (wav);
         return -1;
@@ -143,19 +166,29 @@ int wav_start_capture (CaptureState *s, const char *path, int freq,
     wav->nchannels = nchannels;
     wav->freq = freq;
 
-    qemu_put_buffer (wav->f, hdr, sizeof (hdr));
+    if (fwrite (hdr, sizeof (hdr), 1, wav->f) != 1) {
+        monitor_printf (mon, "Failed to write header\nReason: %s\n",
+                        strerror (errno));
+        goto error_free;
+    }
 
     cap = AUD_add_capture (&as, &ops, wav);
     if (!cap) {
-        monitor_printf(mon, "Failed to add audio capture\n");
-        g_free (wav->path);
-        qemu_fclose (wav->f);
-        g_free (wav);
-        return -1;
+        monitor_printf (mon, "Failed to add audio capture\n");
+        goto error_free;
     }
 
     wav->cap = cap;
     s->opaque = wav;
     s->ops = wav_capture_ops;
     return 0;
+
+error_free:
+    g_free (wav->path);
+    if (fclose (wav->f)) {
+        monitor_printf (mon, "Failed to close wave file\nReason: %s\n",
+                        strerror (errno));
+    }
+    g_free (wav);
+    return -1;
 }