Add for audio sub-format in audion system. From Ken Pettit

NxWidgets/ChangeLog.txt

@@ -379,7 +379,7 @@
   state due to e.g. powerdown or other manual intervention.  From
   Petteri Aimonen (2013-6-4).
 
-1.9 2013-xx-xx Gregory Nutt <gnutt@nuttx.org>
+1.9 2013-10-28 Gregory Nutt <gnutt@nuttx.org>
 
 * NxWM::CCalibration.cxx/hxx:  If CONFIG_NXWM_CALIBRATION_MESSAGES is
   defined then CCalibration will provide some instructions in the center
@@ -398,3 +398,5 @@
 * NxWM::CCalibration and NxWM::CTouchscreen:  Add a complex touchscreen
   scaling algorithm to handling the case where the measured X values also
   vary with y position (and vice versa) (2013-10-17).
+
+1.10 2013-xx-xx Gregory Nutt <gnutt@nuttx.org>

apps/ChangeLog.txt

@@ -646,7 +646,7 @@
 	* apps/nshlib/nsh_fscmds.c:  Fix NSH listing output for the case
 	  of a single file.  Provided by Lorenz Meier (2013-9-13).
 
-6.31 2013-xx-xx Gregory Nutt <gnutt@nuttx.org>
+6.31 2013-10-28 Gregory Nutt <gnutt@nuttx.org>
 
 	* apps/nshlib/nsh_netcmds.c:  Remove a warning when DHCP is not
 	  enabled (2013-9-17).
@@ -655,7 +655,7 @@
 	  (2013-9017).
 	* apps/examples/ostest/Kconfig:  Add configuration options for
 	  the FPU test.  There are still many OS test configuration
-	  optionst that do not appear in Kconfig (2013-9-18).
+	  options that do not appear in Kconfig (2013-9-18).
 	* apps/examples/cc3000:  Condition the CC3000 example on having
 	  selected the CC3000 device.  Otherwise, you are prompted for
 	  this the CC3000 option on each 'make oldconfig' (2013-9-18).
@@ -702,4 +702,7 @@
 	* apps/examples/cc3000:  Updates from David Sidrane (2013-10-25).
 	* apps/system/nxplayer:  Implements a command line media
 	  player.  From Ken Pettit (2013-10-27).
+	* apps/system/nxplayer: Add logic to verify the audio sub-format.
+	  From Ken Pettit (2013-10-28).
 
+6.31 2013-xx-xx Gregory Nutt <gnutt@nuttx.org>

apps/include/nxplayer.h

@@ -180,6 +180,8 @@ int nxplayer_setdevice(FAR struct nxplayer_s *pPlayer, char* device);
  *   filename  - Pointer to pathname of the file to play
  *   filefmt   - Format of audio in filename if known, AUDIO_FMT_UNDEF
  *               to let nxplayer_playfile() determine automatically.
+ *   subfmt    - Sub-Format of audio in filename if known, AUDIO_FMT_UNDEF
+ *               to let nxplayer_playfile() determine automatically.
  *
  * Returned values:
  *   OK if file found, device found, and playback started.
@@ -187,7 +189,7 @@ int nxplayer_setdevice(FAR struct nxplayer_s *pPlayer, char* device);
  **************************************************************************/
 
 int nxplayer_playfile(FAR struct nxplayer_s *pPlayer, char* filename,
-          int filefmt);
+          int filefmt, int subfmt);
 
 /****************************************************************************
  * Name: nxplayer_stop
@@ -353,4 +355,3 @@ int nxplayer_systemreset(FAR struct nxplayer_s *pPlayer);
 #endif
 
 #endif /* __APPS_SYSTEM_NXPLAYER_NXPLAYER_H */
-

apps/system/nxplayer/nxplayer.c

@@ -81,6 +81,7 @@ struct nxplayer_ext_fmt_s
 {
   const char  *ext;
   uint16_t    format;
+  CODE int    (*getsubformat)(FAR FILE *fd);
 };
 #endif
 
@@ -88,6 +89,10 @@ struct nxplayer_ext_fmt_s
  * Private Function Prototypes
  ****************************************************************************/
 
+#ifdef CONFIG_AUDIO_FORMAT_MIDI
+int nxplayer_getmidisubformat(FAR FILE *fd);
+#endif
+
 /****************************************************************************
  * Private Data
  ****************************************************************************/
@@ -95,26 +100,26 @@ struct nxplayer_ext_fmt_s
 #ifdef CONFIG_NXPLAYER_FMT_FROM_EXT
 static const struct nxplayer_ext_fmt_s g_known_ext[] = {
 #ifdef CONFIG_AUDIO_FORMAT_AC3
-  { "ac3",      AUDIO_FMT_AC3 },
+  { "ac3",      AUDIO_FMT_AC3, NULL },
 #endif
 #ifdef CONFIG_AUDIO_FORMAT_MP3
-  { "mp3",      AUDIO_FMT_MP3 },
+  { "mp3",      AUDIO_FMT_MP3, NULL },
 #endif
 #ifdef CONFIG_AUDIO_FORMAT_DTS
-  { "dts",      AUDIO_FMT_DTS },
+  { "dts",      AUDIO_FMT_DTS, NULL },
 #endif
 #ifdef CONFIG_AUDIO_FORMAT_WMA
-  { "wma",      AUDIO_FMT_WMA },
+  { "wma",      AUDIO_FMT_WMA, NULL },
 #endif
 #ifdef CONFIG_AUDIO_FORMAT_PCM
-  { "wav",      AUDIO_FMT_PCM },
+  { "wav",      AUDIO_FMT_PCM, NULL },
 #endif
 #ifdef CONFIG_AUDIO_FORMAT_MIDI
-  { "mid",      AUDIO_FMT_MIDI },
+  { "mid",      AUDIO_FMT_MIDI, nxplayer_getmidisubformat },
-  { "midi",     AUDIO_FMT_MIDI },
+  { "midi",     AUDIO_FMT_MIDI, nxplayer_getmidisubformat },
 #endif
 #ifdef CONFIG_AUDIO_FORMAT_OGG_VORBIS
-  { "ogg",      AUDIO_FMT_OGG_VORBIS }
+  { "ogg",      AUDIO_FMT_OGG_VORBIS, NULL }
 #endif
 };
 static const int g_known_ext_count = sizeof(g_known_ext) /
@@ -140,12 +145,15 @@ static const int g_known_ext_count = sizeof(g_known_ext) /
  *
  ****************************************************************************/
 
-static int nxplayer_opendevice(FAR struct nxplayer_s *pPlayer, int format)
+static int nxplayer_opendevice(FAR struct nxplayer_s *pPlayer, int format,
+    int subfmt)
 {
   struct dirent*        pDevice;
-  DIR*     		          dirp;
+  DIR*                  dirp;
   char                  path[64];
   struct audio_caps_s   caps;
+  uint8_t               supported = TRUE;
+  uint8_t               x;
 
   /* If we have a preferred device, then open it */
 
@@ -156,7 +164,7 @@ static int nxplayer_opendevice(FAR struct nxplayer_s *pPlayer, int format)
        * format is specified by the device
        */
 
-      if (((pPlayer->prefformat & format) == 0) ||
+      if (((pPlayer->prefformat & (1 << (format - 1)) == 0) ||
           ((pPlayer->preftype & AUDIO_TYPE_OUTPUT) == 0))
         {
           /* Format not supported by the device */
@@ -223,19 +231,69 @@ static int nxplayer_opendevice(FAR struct nxplayer_s *pPlayer, int format)
               caps.ac_len = sizeof(caps);
               caps.ac_type = AUDIO_TYPE_QUERY;
               caps.ac_subtype = AUDIO_TYPE_QUERY;
+
               if (ioctl(pPlayer->devFd, AUDIOIOC_GETCAPS, (unsigned long) &caps)
                   == caps.ac_len)
                 {
                   /* Test if this device supports the format we want */
 
                   int ac_format = caps.ac_format[0] | (caps.ac_format[1] << 8);
-                  if (((ac_format & format) != 0) &&
+                  if (((ac_format & (1 << (format - 1))) != 0) &&
                       (caps.ac_controls[0] & AUDIO_TYPE_OUTPUT))
                     {
-                      /* Yes, it supports this format.  Use this device */
+                      /* Do subformat detection */
 
-                      closedir(dirp);
+                      if (subfmt != AUDIO_FMT_UNDEF)
-                      return OK;
+                        {
+                          /* Prepare to get sub-formats for this main format */
+
+                          caps.ac_subtype = format;
+                          caps.ac_format[0] = 0;
+                          while (ioctl(pPlayer->devFd, AUDIOIOC_GETCAPS, 
+                              (unsigned long) &caps) == caps.ac_len)
+                            {
+                              /* Check the next set of 4 controls to find the subformat */
+                              for (x = 0; x < sizeof(caps.ac_controls); x++)
+                                {
+                                  if (caps.ac_controls[x] == subfmt)
+                                    {
+                                      /* Sub format supported! */
+
+                                      break;
+                                    }
+                                  else if (caps.ac_controls[x] == AUDIO_SUBFMT_END)
+                                    {
+                                      /* Sub format not supported */
+
+                                      supported = FALSE;
+                                      break;
+                                    }
+                                }
+
+                              /* If we reached the end of the subformat list, then
+                               * break out of the loop.
+                               */
+
+                              if (x != sizeof(caps.ac_controls))
+                                {
+                                  break;
+                                }
+
+                              /* Increment ac_format[0] to get next set of subformats */
+
+                              caps.ac_format[0]++;
+                            }
+                        }
+
+                      /* Test if subformat needed and detected */
+
+                      if (supported)
+                        {
+                          /* Yes, it supports this format.  Use this device */
+
+                          closedir(dirp);
+                          return OK;
+                        }
                     }
                 }
 
@@ -257,6 +315,47 @@ static int nxplayer_opendevice(FAR struct nxplayer_s *pPlayer, int format)
   return -ENODEV;
 }
 
+/****************************************************************************
+ * Name: nxplayer_getmidisubformat
+ *
+ *   nxplayer_getmidisubformat() reads the MIDI header and determins the
+ *   MIDI format of the file.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_AUDIO_FORMAT_MIDI
+int nxplayer_getmidisubformat(FAR FILE *fd)
+{
+  char    type[2];
+  int     ret;
+
+  /* Seek to location 8 in the file (the format type) */
+
+  fseek(fd, 8, SEEK_SET);
+  fread(type, 1, 2, fd);
+
+  /* Set return value based on type */
+
+  switch (type[1])
+    {
+      case 0:
+        ret = AUDIO_SUBFMT_MIDI_0;
+        break;
+
+      case 1:
+        ret = AUDIO_SUBFMT_MIDI_1;
+        break;
+
+      case 2:
+        ret = AUDIO_SUBFMT_MIDI_2;
+        break;
+    }
+  fseek(fd, 0, SEEK_SET);
+
+  return ret;
+}
+#endif
+
 /****************************************************************************
  * Name: nxplayer_fmtfromextension
  *
@@ -266,10 +365,12 @@ static int nxplayer_opendevice(FAR struct nxplayer_s *pPlayer, int format)
  ****************************************************************************/
 
 #ifdef CONFIG_NXPLAYER_FMT_FROM_EXT
-static int nxplayer_fmtfromextension(char* pFilename)
+static inline int nxplayer_fmtfromextension(FAR struct nxplayer_s *pPlayer,
+    char* pFilename, int *subfmt)
 {
-  const char                *pExt;
+  const char  *pExt;
-  int                       x, c;
+  uint8_t      x;
+  uint8_t      c;
 
   /* Find the file extension, if any */
 
@@ -289,6 +390,14 @@ static int nxplayer_fmtfromextension(char* pFilename)
 
               if (strcasecmp(pExt, g_known_ext[c].ext) == 0)
                 {
+                  /* Test if we have a sub-format detection routine */
+
+                  if (subfmt && g_known_ext[c].getsubformat)
+                    {
+
+                      *subfmt = g_known_ext[c].getsubformat(pPlayer->fileFd);
+                    }
+
                   /* Return the format for this extension */
 
                   return g_known_ext[c].format;
@@ -1027,6 +1136,7 @@ int nxplayer_stop(FAR struct nxplayer_s *pPlayer)
       sem_post(&pPlayer->sem);                  /* Release the semaphore */
       return OK;
     }
+
   sem_post(&pPlayer->sem);
 
   /* Notify the playback thread that it needs to cancel the playback */
@@ -1067,9 +1177,10 @@ int nxplayer_stop(FAR struct nxplayer_s *pPlayer)
  *
  ****************************************************************************/
 
-int nxplayer_playfile(FAR struct nxplayer_s *pPlayer, char* pFilename, int filefmt)
+int nxplayer_playfile(FAR struct nxplayer_s *pPlayer, char* pFilename, int filefmt,
+    int subfmt)
 {
-  int                 ret;
+  int                 ret, tmpsubfmt = AUDIO_FMT_UNDEF;
   struct mq_attr      attr;
   struct sched_param  sparam;
   pthread_attr_t      tattr;
@@ -1106,7 +1217,9 @@ int nxplayer_playfile(FAR struct nxplayer_s *pPlayer, char* pFilename, int filef
           /* File not found in the media dir.  Do a search */
 
           if (nxplayer_mediasearch(pPlayer, pFilename, path, sizeof(path)) != OK)
-            return -ENOENT;
+            {
+              return -ENOENT;
+            }
 #else
           return -ENOENT;
 #endif  /* CONFIG_NXPLAYER_MEDIA_SEARCH */
@@ -1121,14 +1234,14 @@ int nxplayer_playfile(FAR struct nxplayer_s *pPlayer, char* pFilename, int filef
 
 #ifdef CONFIG_NXPLAYER_FMT_FROM_EXT
   if (filefmt == AUDIO_FMT_UNDEF)
-    filefmt = nxplayer_fmtfromextension(pFilename);
+    filefmt = nxplayer_fmtfromextension(pPlayer, pFilename, &tmpsubfmt);
 #endif
 
   /* If type not identified, then test for known header types */
 
 #ifdef CONFIG_NXPLAYER_FMT_FROM_HEADER
   if (filefmt == AUDIO_FMT_UNDEF)
-    filefmt = nxplayer_fmtfromheader(pPlayer);
+    filefmt = nxplayer_fmtfromheader(pPlayer, &subfmt, &tmpsubfmt);
 #endif
 
   /* Test if we determined the file format */
@@ -1141,9 +1254,16 @@ int nxplayer_playfile(FAR struct nxplayer_s *pPlayer, char* pFilename, int filef
       goto err_out_nodev;
     }
 
+  /* Test if we have a sub format assignment from above */
+
+  if (subfmt == AUDIO_FMT_UNDEF)
+    {
+      subfmt = tmpsubfmt;
+    }
+
   /* Try to open the device */
 
-  ret = nxplayer_opendevice(pPlayer, filefmt);
+  ret = nxplayer_opendevice(pPlayer, filefmt, subfmt);
   if (ret < 0)
     {
       /* Error opening the device */
@@ -1224,12 +1344,14 @@ int nxplayer_playfile(FAR struct nxplayer_s *pPlayer, char* pFilename, int filef
 err_out:
   close(pPlayer->devFd);
   pPlayer->devFd = -1;
+
 err_out_nodev:
   if (pPlayer->fileFd != NULL)
     {
       fclose(pPlayer->fileFd);
       pPlayer->fileFd = NULL;
     }
+
   return ret;
 }
 

apps/system/nxplayer/nxplayer_main.c

@@ -187,7 +187,7 @@ static int nxplayer_cmd_play(FAR struct nxplayer_s *pPlayer, char* parg)
 
   /* Try to play the file specified */
 
-  ret = nxplayer_playfile(pPlayer, parg, AUDIO_FMT_UNDEF);
+  ret = nxplayer_playfile(pPlayer, parg, AUDIO_FMT_UNDEF, AUDIO_FMT_UNDEF);
 
   /* Test if the device file exists */
 
@@ -507,7 +507,11 @@ static int nxplayer_cmd_device(FAR struct nxplayer_s *pPlayer, char* parg)
 
 static int nxplayer_cmd_quit(FAR struct nxplayer_s *pPlayer, char* parg)
 {
-  /* Nothing to do */
+  /* Stop the playback if any */
+
+#ifndef CONFIG_AUDIO_EXCLUDE_STOP
+  nxplayer_stop(pPlayer);
+#endif
 
   return OK;
 }

nuttx/ChangeLog

@@ -5559,7 +5559,7 @@
 	  are just hacked out and gutted versions of the corresponding
 	  STM32 files (2013-9-13).
 
-6.31 2013-xx-xx Gregory Nutt <gnutt@nuttx.org>
+6.31 2013-10-28 Gregory Nutt <gnutt@nuttx.org>
 
 	* nuttx/fs/romfs/fs_romfsutil.c:  Back out part of a recent
 	  ROMFS change (2013-9-14).
@@ -5571,7 +5571,7 @@
 	* configs/ and a few Ethernet drivers:  Add the prefix ETH0
 	  to all PHY configuration selections.  This will allow us
 	  to support to Ethernet MAC drivers with two different
-	  PHYS (identified with ETH0 and ETH1) (2013-9-17).
+	  PHYs (identified with ETH0 and ETH1) (2013-9-17).
 	* net/Kconfig and drivers/net/Kconfig:  Move PHY selections from
 	  net/Kconfig to drivers/net/Kconfig where they belong.  Add the previx
 	  ETH0_ to each PHY selection.  And a new configuration
@@ -5617,7 +5617,7 @@
 	  endpoint from 0xff (invalid) to 10.  This is not a critical change
 	  but will avoid a complaint from the Linux driver when it overrides
 	  the 0xff value (2013-9-22).
-	* configs/zkit-arm-1769:  LED1 is not user controllable after booting.
+	* configs/zkit-arm-1769:  LED1 is now user controllable after booting.
 	  From Rashid Fatah (2013-9-23).
 	* arch/arm/src/sama5/sam_hsmci.c:  TX DMA disabled.  It is just not
 	  reliable. No idea why.  RX DMA is still used (2013-9-23).
@@ -5654,9 +5654,9 @@
 	  next outgoing packet from the TX done interrupt handling.  From
 	  Max Holtzberg (2013-9-27)
 	* sched/os_start.c:  Should not call group_setupidlefiles() if there
-	  are not file descriptors (and, hence, no file system) (2013-9-27).
+	  are no file descriptors (and, hence, no file system) (2013-9-27).
 	* arch/arm/src/sama5/sam_gmac.c:  GMAC driver and GMII logic is
-	  code complete and readay for test (2013-9-27)
+	  code complete and ready for test (2013-9-27)
 	* configs/compal_e86: Basic board support for the Motorola C139
 	  (Compal E86) phone.  From Craig Comstock (2013-9-27).
 	* configs/compal_e86: Converted to use the kconfig-frontends
@@ -5686,14 +5686,14 @@
 	  From Alan Carvalho de Assis. (2013-9-30).
 	* net/net_sendfile:  The high performance sendfile logic is
 	  now functional.  From Max Holtzberg (2013-9-30).
-	* tools/define.sh:  'cut' long because as it once did.  Script
+	* tools/define.sh:  'cut' no longer works as it once did.  Script
 	  adapted to observed behavior (2013-9-30).
 	* include/nuttx/net/route.h and net/net_*route.c:  Partial
 	  implementation of a routing table. Not yet hooked into the
 	  build system (2013-10-1)
 	* include/net/route.h:  Defines the application interface to
 	  the routing table (2013-10-2).
-	* configs/spark:  Add configuratino for the Spark Core.  The
+	* configs/spark:  Add configuration for the Spark Core.  The
 	  initial check-in is basically the Maple Mini board (2013-10-2).
 	* include/net/route.h and libc/net/lib_addroute.c and delroute.c:
 	  Add an application interface to manage the routing table
@@ -5724,7 +5724,7 @@
 	  Max Holtzberg (2013-10-8).
 	* arch/arm/src/sama5/sam_lcd.c: LCDC driver is code complete and
 	  incorporated into the build system (but still untested (2013-10-8).
-	* configs/sama5d3x-ek/nx:  Add an examples/nx configuratino that
+	* configs/sama5d3x-ek/nx:  Add an examples/nx configuration that
 	  will be used for the SAMA5 LCD bring-up (2013-10-8).
 	* configs/arduino-due/Kconfig and include/board.h:  Add configuration
 	  to select revision 3 of the Arduino Due which has some small
@@ -5749,7 +5749,7 @@
 	  uip/uip_udpconn.c, uip/uip_udpinput.c:  Changed the meaning of the
 	  uip_*input functions. They now return success when a packet is
 	  dropped; This is needed for the ENCX24J600 driver that must make
-	  a decision to return the packet or not:  It should not retai
+	  a decision to return the packet or not:  It should not retry
 	  dropped packets. From Max Holtzberg (2013-10-11).
 	* drivers/net/encx24j600.c and Kconfig: ENCX24J600: Improved descriptor
 	  handling, free packets on rx abort interrupt. From Max Holtzberg
@@ -5768,7 +5768,7 @@
 	* configs/sama5d3x-ek/nxwm/defconfig:  Now uses scaled icons in the
 	  the NxWM taskbar (2013-10-15).
 	* configs/sama5d3x-ek/nxwm/defconfig:  Use the 320x320 NuttX logo as
-	  the NxWM backgroun (2013-10-15).
+	  the NxWM background (2013-10-15).
 	* arch/arm/src/stm32/chip/stm32f103c_pinmap.h:  Pinmapping corrections
 	  from David Sidrane (2013-10-16).
 	* configs/spark:  The Spark device configuration is receiving some
@@ -5826,7 +5826,7 @@
 	  driver into the build system; Verify the correct operation of the
 	  SAMA5 RTC driver (2013-10-19).
 	* arch/arm/src/sama5/sam_wdt.c and .h:  Add a SAMA5 watchdog timer
-	  drvier. Untested on initial check-in (2013-10-19).
+	  driver. Untested on initial check-in (2013-10-19).
 	* arch/arm/src/sama5/sam_trng.c, sam_trng.h, and chip/sam_trng.h:  Add
 	  a /dev/random driver based on the SAMA5D3 TRNG peripheral (2013-10-20).
 	* configs/sama5d3x-3k/demo:  The TRNG and /dev/random are now enabled
@@ -5893,8 +5893,8 @@
 	* drivers/audio/ and include/nuttx/audio/vs1053.h:  Updated
 	  VS1053 driver from ken Pettit (2013-10-27).
 	* configs/mikroe-stm32f4/: Updated configuration for the
-	  Mikrow STM32F4 board from Ken Pettit (2013-10-27).
+	  Mikroe STM32F4 board from Ken Pettit (2013-10-27).
-	* arch/arm/src/stm32/stm32_spi.c:  DMA-related fixe from Ken
+	* arch/arm/src/stm32/stm32_spi.c:  DMA-related fixes from Ken
 	  Pettit (2013-10-27).
 	* sched/sched_releasetcb.c: Fix a cornercase:  If sched_releasetcb()
 	  is called as part of a failed pthread startup before the flags
@@ -5904,4 +5904,7 @@
 	  modes:  single channel or multiple channel with sequencer support.
 	  software trigger or timer trigger;  ADC channel interrupts or
 	  DMA (2013-10-28).
+	* nuttx/drivers/audio/vs1053.c and nuttx/include/nuttx/audio/audio.h:
+	  Add logic to verify the audio sub-format.  From Ken Pettit (2013-10-28).
 
+6.32 2013-xx-xx Gregory Nutt <gnutt@nuttx.org>

nuttx/drivers/audio/vs1053.c

@@ -583,34 +583,54 @@ static int vs1053_getcaps(FAR struct audio_lowerhalf_s *lower, int type,
 
         pCaps->ac_channels = 2;       /* Stereo output */
 
-        /* The input formats we can decode / accept */
+        switch (pCaps->ac_subtype)
+          {
+            case AUDIO_TYPE_QUERY:
+              /* The input formats we can decode / accept */
 
-        pCaps->ac_format[0] = 0
+              *((uint16_t *) &pCaps->ac_format[0]) = 0
 #ifdef CONFIG_AUDIO_FORMAT_AC3
-              | AUDIO_FMT_AC3
+                    | (1 << (AUDIO_FMT_AC3 - 1))
 #endif
 #ifdef CONFIG_AUDIO_FORMAT_MP3
-              | AUDIO_FMT_MP3
+                    | (1 << (AUDIO_FMT_MP3 - 1))
 #endif
 #ifdef CONFIG_AUDIO_FORMAT_WMA
-              | AUDIO_FMT_WMA
+                    | (1 << (AUDIO_FMT_WMA - 1))
 #endif
 #ifdef CONFIG_AUDIO_FORMAT_MIDI
-              | AUDIO_FMT_MIDI
+                    | (1 << (AUDIO_FMT_MIDI - 1))
 #endif
 #ifdef CONFIG_AUDIO_FORMAT_PCM
-              | AUDIO_FMT_PCM
+                    | (1 << (AUDIO_FMT_PCM - 1))
 #endif
-          ;
-
 #ifdef CONFIG_AUDIO_FORMAT_OGG_VORBIS
-        pCaps->ac_format[1] = (AUDIO_FMT_OGG_VORBIS) >> 8;
+                    | (1 << (AUDIO_FMT_OGG_VORBIS - 1))
+#endif
+                ;
+
+              /* The types of audio units we implement */
+
+              pCaps->ac_controls[0] = AUDIO_TYPE_OUTPUT | AUDIO_TYPE_FEATURE |
+                                      AUDIO_TYPE_PROCESSING;
+
+              break;
+
+            /* Report sub-formats for MIDI if requested */
+
+#ifdef CONFIG_AUDIO_FORMAT_MIDI
+            case AUDIO_FMT_MIDI:
+              /* We only support Format 0 */
+
+              pCaps->ac_controls[0] = AUDIO_SUBFMT_MIDI_0;
+              pCaps->ac_controls[1] = AUDIO_SUBFMT_END;
+              break;
 #endif
 
-        /* The types of audio units we implement */
+            default:
-
+              pCaps->ac_controls[0] = AUDIO_SUBFMT_END;
-        pCaps->ac_controls[0] = AUDIO_TYPE_OUTPUT | AUDIO_TYPE_FEATURE |
+              break;
-                                AUDIO_TYPE_PROCESSING;
+          }
 
         break;
 
@@ -663,6 +683,7 @@ static int vs1053_getcaps(FAR struct audio_lowerhalf_s *lower, int type,
             /* Fill in the ac_controls section with the Feature Units we have */
 
             pCaps->ac_controls[0] = AUDIO_FU_VOLUME | AUDIO_FU_BASS | AUDIO_FU_TREBLE;
+            pCaps->ac_controls[1] = AUDIO_FU_BALANCE >> 8;
           }
         else
           {

nuttx/include/nuttx/audio/audio.h

@@ -129,33 +129,40 @@
  * is a list of bit-field definitons for defining the device type.
  */
 
-#define AUDIO_TYPE_QUERY            0x0000
+#define AUDIO_TYPE_QUERY            0x00
-#define AUDIO_TYPE_INPUT            0x0002
+#define AUDIO_TYPE_INPUT            0x02
-#define AUDIO_TYPE_OUTPUT           0x0004
+#define AUDIO_TYPE_OUTPUT           0x02
-#define AUDIO_TYPE_MIXER            0x0008
+#define AUDIO_TYPE_MIXER            0x04
-#define AUDIO_TYPE_SELECTOR         0x0010
+#define AUDIO_TYPE_SELECTOR         0x08
-#define AUDIO_TYPE_FEATURE          0x0020
+#define AUDIO_TYPE_FEATURE          0x10
-#define AUDIO_TYPE_EFFECT           0x0040
+#define AUDIO_TYPE_EFFECT           0x20
-#define AUDIO_TYPE_PROCESSING       0x0080
+#define AUDIO_TYPE_PROCESSING       0x40
-#define AUDIO_TYPE_EXTENSION        0x0100
+#define AUDIO_TYPE_EXTENSION        0x80
 
 /* Audio Format Types *******************************************************/
-/* The following defines the audio data format types in NuttX.  */
+/* The following defines the audio data format types in NuttX.  During a
+ * format query, these will be converted to bit positions withing the
+ * ac_format field, meaning we currently only support up to 16 formats. To
+ * support more than that, we will use the FMT_OTHER entry, and the 
+ * interfacing software can perform a second query to get the other formats.
+ */
 
-#define AUDIO_FMT_UNDEF             0x000
+#define AUDIO_FMT_UNDEF             0x00
-#define AUDIO_FMT_OTHER             0x001
+#define AUDIO_FMT_OTHER             0x01
-#define AUDIO_FMT_MPEG              0x002
+#define AUDIO_FMT_MPEG              0x02
-#define AUDIO_FMT_AC3               0x004
+#define AUDIO_FMT_AC3               0x03
-#define AUDIO_FMT_WMA               0x008
+#define AUDIO_FMT_WMA               0x04
-#define AUDIO_FMT_DTS               0x010
+#define AUDIO_FMT_DTS               0x05
-#define AUDIO_FMT_PCM               0x020
+#define AUDIO_FMT_PCM               0x06
-#define AUDIO_FMT_WAV               0x020
+#define AUDIO_FMT_WAV               0x07
-#define AUDIO_FMT_MP3               0x040
+#define AUDIO_FMT_MP3               0x08
-#define AUDIO_FMT_MIDI              0x080
+#define AUDIO_FMT_MIDI              0x09
-#define AUDIO_FMT_OGG_VORBIS        0x100
+#define AUDIO_FMT_OGG_VORBIS        0x0A
+#define AUDIO_FMT_FLAC              0x0B
 
 /* Audio Sub-Format Types ***************************************************/
 
+#define AUDIO_SUBFMT_END            0x00
 #define AUDIO_SUBFMT_PCM_MP1        0x01
 #define AUDIO_SUBFMT_PCM_MP2        0x02
 #define AUDIO_SUBFMT_PCM_MP3        0x03
@@ -167,6 +174,9 @@
 #define AUDIO_SUBFMT_PCM_S16_BE     0x09
 #define AUDIO_SUBFMT_PCM_S16_LE     0x0A
 #define AUDIO_SUBFMT_PCM_U16_BE     0x0B
+#define AUDIO_SUBFMT_MIDI_0         0x0C
+#define AUDIO_SUBFMT_MIDI_1         0x0D
+#define AUDIO_SUBFMT_MIDI_2         0x0E
 
 /* Supported Sampling Rates *************************************************/