audio: make mixeng optional

Implementation of the previously added mixing-engine option.

Signed-off-by: Kővágó, Zoltán <DirtY.iCE.hu@gmail.com>
Message-id: c05bc258889ed289e8ee1bdbcc5e84174ec221e7.1570996490.git.DirtY.iCE.hu@gmail.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

1 files changed, 16 insertions, 8 deletions

diff --git a/audio/audio_template.h b/audio/audio_template.h
index 1006d6b1eb..3287d7075e 100644
--- a/audio/audio_template.h
+++ b/audio/audio_template.h
@@ -78,13 +78,17 @@ static void glue (audio_pcm_hw_free_resources_, TYPE) (HW *hw)
 
 static void glue(audio_pcm_hw_alloc_resources_, TYPE)(HW *hw)
 {
-    size_t samples = hw->samples;
-    if (audio_bug(__func__, samples == 0)) {
-        dolog("Attempted to allocate empty buffer\n");
-    }
+    if (glue(audio_get_pdo_, TYPE)(hw->s->dev)->mixing_engine) {
+        size_t samples = hw->samples;
+        if (audio_bug(__func__, samples == 0)) {
+            dolog("Attempted to allocate empty buffer\n");
+        }
 
-    HWBUF = g_malloc0(sizeof(STSampleBuffer) + sizeof(st_sample) * samples);
-    HWBUF->size = samples;
+        HWBUF = g_malloc0(sizeof(STSampleBuffer) + sizeof(st_sample) * samples);
+        HWBUF->size = samples;
+    } else {
+        HWBUF = NULL;
+    }
 }
 
 static void glue (audio_pcm_sw_free_resources_, TYPE) (SW *sw)
@@ -103,6 +107,10 @@ static int glue (audio_pcm_sw_alloc_resources_, TYPE) (SW *sw)
 {
     int samples;
 
+    if (!glue(audio_get_pdo_, TYPE)(sw->s->dev)->mixing_engine) {
+        return 0;
+    }
+
     samples = ((int64_t) sw->HWBUF->size << 32) / sw->ratio;
 
     sw->buf = audio_calloc(__func__, samples, sizeof(struct st_sample));
@@ -328,9 +336,9 @@ static HW *glue(audio_pcm_hw_add_, TYPE)(AudioState *s, struct audsettings *as)
     HW *hw;
     AudiodevPerDirectionOptions *pdo = glue(audio_get_pdo_, TYPE)(s->dev);
 
-    if (pdo->fixed_settings) {
+    if (!pdo->mixing_engine || pdo->fixed_settings) {
         hw = glue(audio_pcm_hw_add_new_, TYPE)(s, as);
-        if (hw) {
+        if (!pdo->mixing_engine || hw) {
             return hw;
         }
     }