audio: bugfixes for jack backend and gus emulation.

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Merge remote-tracking branch 'remotes/kraxel/tags/audio-20200619-pull-request' into staging

audio: bugfixes for jack backend and gus emulation.

# gpg: Signature made Fri 19 Jun 2020 14:17:22 BST
# gpg:                using RSA key 4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>" [full]
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>" [full]
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>" [full]
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/audio-20200619-pull-request:
  hw/audio/gus: Fix registers 32-bit access
  audio/jack: simplify the re-init code path
  audio/jack: honour the enable state of the audio device
  audio/jack: do not remove ports when finishing
  audio/jack: remove invalid set of input support bool
  audio/jack: remove unused stopped state
  audio/jack: fix invalid minimum buffer size check

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

audio/jackaudio.c

@@ -38,7 +38,6 @@ struct QJack;
 
 typedef enum QJackState {
     QJACK_STATE_DISCONNECTED,
-    QJACK_STATE_STOPPED,
     QJACK_STATE_RUNNING,
     QJACK_STATE_SHUTDOWN
 }
@@ -57,7 +56,7 @@ typedef struct QJackClient {
     AudiodevJackPerDirectionOptions *opt;
 
     bool out;
-    bool finished;
+    bool enabled;
     bool connect_ports;
     int  packets;
 
@@ -272,9 +271,17 @@ static int qjack_process(jack_nframes_t nframes, void *arg)
     }
 
     if (c->out) {
-        qjack_buffer_read_l(&c->fifo, buffers, nframes);
+        if (likely(c->enabled)) {
+            qjack_buffer_read_l(&c->fifo, buffers, nframes);
+        } else {
+            for(int i = 0; i < c->nchannels; ++i) {
+                memset(buffers[i], 0, nframes * sizeof(float));
+            }
+        }
     } else {
-        qjack_buffer_write_l(&c->fifo, buffers, nframes);
+        if (likely(c->enabled)) {
+            qjack_buffer_write_l(&c->fifo, buffers, nframes);
+        }
     }
 
     return 0;
@@ -315,8 +322,8 @@ static void qjack_client_recover(QJackClient *c)
     if (c->state == QJACK_STATE_DISCONNECTED &&
         c->packets % 100 == 0) {
 
-        /* if not finished then attempt to recover */
+        /* if enabled then attempt to recover */
-        if (!c->finished) {
+        if (c->enabled) {
             dolog("attempting to reconnect to server\n");
             qjack_client_init(c);
         }
@@ -388,7 +395,10 @@ static int qjack_client_init(QJackClient *c)
     char client_name[jack_client_name_size()];
     jack_options_t options = JackNullOption;
 
-    c->finished      = false;
+    if (c->state == QJACK_STATE_RUNNING) {
+        return 0;
+    }
+
     c->connect_ports = true;
 
     snprintf(client_name, sizeof(client_name), "%s-%s",
@@ -434,17 +444,6 @@ static int qjack_client_init(QJackClient *c)
     jack_set_xrun_callback(c->client, qjack_xrun, c);
     jack_on_shutdown(c->client, qjack_shutdown, c);
 
-    /*
-     * ensure the buffersize is no smaller then 512 samples, some (all?) qemu
-     * virtual devices do not work correctly otherwise
-     */
-    if (c->buffersize < 512) {
-        c->buffersize = 512;
-    }
-
-    /* create a 2 period buffer */
-    qjack_buffer_create(&c->fifo, c->nchannels, c->buffersize * 2);
-
     /* allocate and register the ports */
     c->port = g_malloc(sizeof(jack_port_t *) * c->nchannels);
     for (int i = 0; i < c->nchannels; ++i) {
@@ -468,6 +467,17 @@ static int qjack_client_init(QJackClient *c)
     jack_activate(c->client);
     c->buffersize = jack_get_buffer_size(c->client);
 
+    /*
+     * ensure the buffersize is no smaller then 512 samples, some (all?) qemu
+     * virtual devices do not work correctly otherwise
+     */
+    if (c->buffersize < 512) {
+        c->buffersize = 512;
+    }
+
+    /* create a 2 period buffer */
+    qjack_buffer_create(&c->fifo, c->nchannels, c->buffersize * 2);
+
     qjack_client_connect_ports(c);
     c->state = QJACK_STATE_RUNNING;
     return 0;
@@ -479,13 +489,13 @@ static int qjack_init_out(HWVoiceOut *hw, struct audsettings *as,
     QJackOut *jo  = (QJackOut *)hw;
     Audiodev *dev = (Audiodev *)drv_opaque;
 
-    if (jo->c.state != QJACK_STATE_DISCONNECTED) {
+    qjack_client_fini(&jo->c);
-        return 0;
-    }
 
     jo->c.out       = true;
+    jo->c.enabled   = false;
     jo->c.nchannels = as->nchannels;
     jo->c.opt       = dev->u.jack.out;
+
     int ret = qjack_client_init(&jo->c);
     if (ret != 0) {
         return ret;
@@ -515,13 +525,13 @@ static int qjack_init_in(HWVoiceIn *hw, struct audsettings *as,
     QJackIn  *ji  = (QJackIn *)hw;
     Audiodev *dev = (Audiodev *)drv_opaque;
 
-    if (ji->c.state != QJACK_STATE_DISCONNECTED) {
+    qjack_client_fini(&ji->c);
-        return 0;
-    }
 
     ji->c.out       = false;
+    ji->c.enabled   = false;
     ji->c.nchannels = as->nchannels;
     ji->c.opt       = dev->u.jack.in;
+
     int ret = qjack_client_init(&ji->c);
     if (ret != 0) {
         return ret;
@@ -549,12 +559,6 @@ static void qjack_client_fini(QJackClient *c)
 {
     switch (c->state) {
     case QJACK_STATE_RUNNING:
-        /* fallthrough */
-
-    case QJACK_STATE_STOPPED:
-        for (int i = 0; i < c->nchannels; ++i) {
-            jack_port_unregister(c->client, c->port[i]);
-        }
         jack_deactivate(c->client);
         /* fallthrough */
 
@@ -575,23 +579,25 @@ static void qjack_client_fini(QJackClient *c)
 static void qjack_fini_out(HWVoiceOut *hw)
 {
     QJackOut *jo = (QJackOut *)hw;
-    jo->c.finished = true;
     qjack_client_fini(&jo->c);
 }
 
 static void qjack_fini_in(HWVoiceIn *hw)
 {
     QJackIn *ji = (QJackIn *)hw;
-    ji->c.finished = true;
     qjack_client_fini(&ji->c);
 }
 
 static void qjack_enable_out(HWVoiceOut *hw, bool enable)
 {
+    QJackOut *jo = (QJackOut *)hw;
+    jo->c.enabled = enable;
 }
 
 static void qjack_enable_in(HWVoiceIn *hw, bool enable)
 {
+    QJackIn *ji = (QJackIn *)hw;
+    ji->c.enabled = enable;
 }
 
 static int qjack_thread_creator(jack_native_thread_t *thread,
@@ -611,9 +617,6 @@ static int qjack_thread_creator(jack_native_thread_t *thread,
 static void *qjack_init(Audiodev *dev)
 {
     assert(dev->driver == AUDIODEV_DRIVER_JACK);
-
-    dev->u.jack.has_in = false;
-
     return dev;
 }
 

hw/audio/gusemu_hal.c

@@ -32,7 +32,7 @@
 
 #define GUSregb(position) (*            (gusptr+(position)))
 #define GUSregw(position) (*(uint16_t *) (gusptr+(position)))
-#define GUSregd(position) (*(uint16_t *)(gusptr+(position)))
+#define GUSregd(position) (*(uint32_t *)(gusptr + (position)))
 
 /* size given in bytes */
 unsigned int gus_read(GUSEmuState * state, int port, int size)

hw/audio/gusemu_mixer.c

@@ -28,7 +28,7 @@
 
 #define GUSregb(position)  (*            (gusptr+(position)))
 #define GUSregw(position)  (*(uint16_t *) (gusptr+(position)))
-#define GUSregd(position)  (*(uint16_t *)(gusptr+(position)))
+#define GUSregd(position)  (*(uint32_t *)(gusptr + (position)))
 
 #define GUSvoice(position) (*(uint16_t *)(voiceptr+(position)))