hosted: More PCM muting work

* Track mute state, only call hw if actual change is needed
 * Don't unmute in audiohw_postinit()
 * sample rate tracking fixes
 * erosq:  Don't start up muted

Change-Id: I004f787a4b7ea73c16b6ec9818ec29a12c89f46b

firmware/drivers/audio/erosqlinux_codec.c

@@ -42,7 +42,7 @@ static int inited = 0;
 
 static long int vol_l_hw = 255;
 static long int vol_r_hw = 255;
-static long int last_ps = 0;
+static long int last_ps = -1;
 
 static void hw_open(void)
 {
@@ -62,6 +62,11 @@ void audiohw_mute(int mute)
 {
     logf("mute %d", mute);
 
+    if (muted == mute)
+       return;
+
+    muted = mute;
+
     if(mute)
     {
         long int ps0 = 0;
@@ -69,10 +74,8 @@ void audiohw_mute(int mute)
     }
     else
     {
-        last_ps = 0;
         erosq_get_outputs();
     }
-    muted = mute;
 }
 
 int erosq_get_outputs(void) {
@@ -115,14 +118,14 @@ void audiohw_preinit(void)
     logf("hw preinit");
     alsa_controls_init();
     hw_open();
-    audiohw_mute(true);  /* Start muted to avoid the POP */
+//    audiohw_mute(true);  /* Start muted to avoid the POP */
+    audiohw_mute(false);
     inited = 1;
 }
 
 void audiohw_postinit(void)
 {
     logf("hw postinit");
-    erosq_get_outputs(); // Unmutes
 }
 
 void audiohw_close(void)

firmware/drivers/audio/rocker_codec.c

@@ -32,6 +32,8 @@ static int fd_hw;
 static long int vol_l_hw = 255;
 static long int vol_r_hw = 255;
 
+static int muted = -1;
+
 static void hw_open(void)
 {
     fd_hw = open("/dev/snd/controlC0", O_RDWR);
@@ -46,6 +48,11 @@ static void hw_close(void)
 
 void audiohw_mute(int mute)
 {
+    if (muted == mute)
+       return;
+
+    muted = mute;
+
     if(mute)
     {
         long int ps0 = 0;
@@ -67,10 +74,7 @@ void audiohw_preinit(void)
 
 void audiohw_postinit(void)
 {
-    long int hp = 2;
-
-    /* Output port switch set to Headphones */
-    //alsa_controls_set_ints("Output Port Switch", 1, &hp); // Unmute happens on PCM start
+    logf("hw postinit");
 }
 
 void audiohw_close(void)

firmware/drivers/audio/xduoolinux_codec.c

@@ -41,7 +41,7 @@ static int inited = 0;
 
 static long int vol_l_hw = 255;
 static long int vol_r_hw = 255;
-static long int last_ps = 0;
+static long int last_ps = -1;
 
 static void hw_open(void)
 {
@@ -61,6 +61,11 @@ void audiohw_mute(int mute)
 {
     logf("mute %d", mute);
 
+    if (muted == mute)
+       return;
+
+    muted = mute;
+
     if(mute)
     {
         long int ps0 = 0;
@@ -68,10 +73,8 @@ void audiohw_mute(int mute)
     }
     else
     {
-        last_ps = 0;
         xduoo_get_outputs();
     }
-    muted = mute;
 }
 
 int xduoo_get_outputs(void){
@@ -124,14 +127,12 @@ void audiohw_preinit(void)
     hw_open();
     audiohw_mute(true);  /* Start muted to avoid the POP */
     inited = 1;
+//    const char * const codec_pmdown = "/sys/devices/platform/ingenic-x3ii.0/x3ii-ak4490-i2s/pmdown_time";  // in ms, defaults 5000
 }
 
 void audiohw_postinit(void)
 {
-//    const char * const codec_pmdown = "/sys/devices/platform/ingenic-x3ii.0/x3ii-ak4490-i2s/pmdown_time";  // in ms, defaults 5000
-
     logf("hw postinit");
-    // xduoo_get_outputs(); // Unmute happens upon playback.
 }
 
 void audiohw_close(void)

firmware/export/erosqlinux_codec.h

@@ -5,6 +5,7 @@
 
 AUDIOHW_SETTING(VOLUME, "dB", 0,  1, -74,   6, -25)
 
+//#define AUDIOHW_NEEDS_INITIAL_UNMUTE
 
 void audiohw_mute(int mute);
 void erosq_set_output(int ps);

firmware/target/hosted/pcm-alsa.c

@@ -454,7 +454,6 @@ void cleanup(void)
     snd_pcm_close(handle);
 }
 
-
 void pcm_play_dma_init(void)
 {
     int err;
@@ -532,9 +531,6 @@ static void pcm_dma_apply_settings_nolock(void)
 #if defined(HAVE_NWZ_LINUX_CODEC)
         /* Sony NWZ linux driver uses a nonstandard mecanism to set the sampling rate */
         audiohw_set_frequency(pcm_sampr);
-#endif
-#ifdef AUDIOHW_MUTE_ON_SRATE_CHANGE
-        audiohw_mute(false);
 #endif
         /* (Will be unmuted by pcm resuming) */
     }
@@ -564,7 +560,7 @@ void pcm_play_dma_stop(void)
     snd_pcm_nonblock(handle, 0);
     snd_pcm_drain(handle);
     snd_pcm_nonblock(handle, 1);
-    last_sample_rate = 0;
+//    last_sample_rate = 0;
 #ifdef AUDIOHW_MUTE_ON_PAUSE
     audiohw_mute(true);
 #endif
@@ -579,7 +575,7 @@ void pcm_play_dma_start(const void *addr, size_t size)
     pcm_data = addr;
     pcm_size = size;
 
-#if !defined(AUDIOHW_MUTE_ON_PAUSE) || !defined(AUDIOHW_MUTE_ON_SRATE_CHANGE)
+#if !defined(AUDIOHW_MUTE_ON_PAUSE) && defined(AUDIOHW_MUTE_ON_SRATE_CHANGE)
     audiohw_mute(false);
 #endif
 
@@ -615,7 +611,7 @@ void pcm_play_dma_start(const void *addr, size_t size)
                     logf("Start error: %s\n", snd_strerror(err));
                     return;
                 }
-#ifdef AUDIOHW_MUTE_ON_PAUSE
+#if defined(AUDIOHW_MUTE_ON_PAUSE)
                 audiohw_mute(false);
 #endif
                 if (err == 0)
@@ -652,6 +648,10 @@ const void * pcm_play_dma_get_peak_buffer(int *count)
 void pcm_play_dma_postinit(void)
 {
     audiohw_postinit();
+
+#ifdef AUDIOHW_NEEDS_INITIAL_UNMUTE
+    audiohw_mute(false);
+#endif
 }
 
 void pcm_set_mixer_volume(int volume)