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xiaoxiang781216 pushed a commit to branch releases/13.0
in repository https://gitbox.apache.org/repos/asf/nuttx-apps.git
The following commit(s) were added to refs/heads/releases/13.0 by this push:
new ebf3d8ab1 nxplayer: add tone cmd implementation
ebf3d8ab1 is described below
commit ebf3d8ab14f852e43af1b0165e25d112a3f630d9
Author: renjianguang <[email protected]>
AuthorDate: Fri Jun 20 16:27:52 2025 +0800
nxplayer: add tone cmd implementation
Play 20 seconds tone:
1.nxplayer
2.nxplayer> device pcm0p
3.nxplayer> tone 48000 20
Signed-off-by: renjianguang <[email protected]>
---
include/system/nxplayer.h | 47 ++++-
system/nxplayer/nxplayer.c | 402 +++++++++++++++++++++++++++-------------
system/nxplayer/nxplayer_main.c | 62 ++++++-
3 files changed, 370 insertions(+), 141 deletions(-)
diff --git a/include/system/nxplayer.h b/include/system/nxplayer.h
index f70a9d55c..2d2e0242f 100644
--- a/include/system/nxplayer.h
+++ b/include/system/nxplayer.h
@@ -48,6 +48,14 @@ struct nxplayer_dec_ops_s
CODE int (*fill_data)(int fd, FAR struct ap_buffer_s *apb);
};
+struct nxplayer_tone_s
+{
+ uint32_t cur_samps; /* The number of samples currently */
+ uint32_t total_samps; /* Total number of samples */
+ uint32_t sample_rate; /* Sampling rate */
+ uint32_t pitch_freq; /* Pitch frequency */
+};
+
/* This structure describes the internal state of the NxPlayer */
struct nxplayer_s
@@ -83,6 +91,7 @@ struct nxplayer_s
#endif
FAR const struct nxplayer_dec_ops_s *ops;
+ struct nxplayer_tone_s tone;
};
typedef int (*nxplayer_func)(FAR struct nxplayer_s *pplayer, char *pargs);
@@ -215,10 +224,14 @@ int nxplayer_playfile(FAR struct nxplayer_s *pplayer,
* Input Parameters:
* pplayer - Pointer to the context to initialize
* filename - Pointer to pathname of the file to play
- * nchannels channel num
- * bpsampe bit width
- * samprate sample rate
- * chmap channel map
+ * filefmt - Format of audio in filename if known, AUDIO_FMT_UNDEF
+ * to let nxplayer_playraw() determine automatically.
+ * subfmt - Sub-Format of audio in filename if known, AUDIO_FMT_UNDEF
+ * to let nxplayer_playraw() determine automatically.
+ * nchannels - channel num
+ * bpsampe - bit width
+ * samprate - sample rate
+ * chmap - channel map
*
* Returned Value:
* OK if file found, device found, and playback started.
@@ -226,9 +239,33 @@ int nxplayer_playfile(FAR struct nxplayer_s *pplayer,
****************************************************************************/
int nxplayer_playraw(FAR struct nxplayer_s *pplayer,
- FAR const char *filename, uint8_t nchannels,
+ FAR const char *filename,
+ int filefmt, int subfmt, uint8_t nchannels,
uint8_t bpsamp, uint32_t samprate, uint8_t chmap);
+/****************************************************************************
+ * Name: nxplayer_playtone
+ *
+ * Plays the generated tone data using the Audio system.
+ * If a preferred device has been set, that device will be used for
+ * the playback, otherwise the first suitable device found in
+ * the /dev/audio directory will be used.
+ *
+ * Input Parameters:
+ * pplayer - Pointer to the context to initialize
+ * samprate - sample rate
+ * pitchfreq - pitch frequency
+ * duration - duration of the generated tone
+ *
+ *
+ * Returned Value:
+ * OK if device found, and playback started.
+ *
+ ****************************************************************************/
+
+int nxplayer_playtone(FAR struct nxplayer_s *pplayer, uint32_t samprate,
+ uint32_t pitchfreq, uint32_t duration);
+
/****************************************************************************
* Name: nxplayer_stop
*
diff --git a/system/nxplayer/nxplayer.c b/system/nxplayer/nxplayer.c
index 173ad622f..f1b7f943b 100644
--- a/system/nxplayer/nxplayer.c
+++ b/system/nxplayer/nxplayer.c
@@ -31,6 +31,8 @@
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
+#include <inttypes.h>
+#include <math.h>
#include <sched.h>
#include <stdbool.h>
#include <stdint.h>
@@ -651,6 +653,49 @@ static int nxplayer_mediasearch(FAR struct nxplayer_s
*pplayer,
}
#endif
+/****************************************************************************
+ * Name: nxplayer_filltone
+ *
+ * Fill the generated tone data into the specified
+ * buffer.
+ *
+ ****************************************************************************/
+
+static int nxplayer_filltone(FAR struct nxplayer_tone_s *tone,
+ FAR struct ap_buffer_s *apb)
+{
+ FAR uint16_t *samples;
+ float value;
+ size_t i;
+
+ apb->nbytes = 0;
+ apb->curbyte = 0;
+ samples = (FAR uint16_t *)apb->samp;
+
+ if (tone->cur_samps >= tone->total_samps)
+ {
+ return -ENODATA;
+ }
+
+ for (i = 0; i < apb->nmaxbytes / 4; i++)
+ {
+ value = sinf(2 * M_PI * tone->pitch_freq *
+ tone->cur_samps / tone->sample_rate);
+ samples[i * 2 + 1] = samples[i * 2] = (uint16_t)(value * 10000);
+
+ tone->cur_samps++;
+ apb->nbytes += 4;
+
+ if (tone->cur_samps >= tone->total_samps)
+ {
+ apb->flags |= AUDIO_APB_FINAL;
+ break;
+ }
+ }
+
+ return 0;
+}
+
/****************************************************************************
* Name: nxplayer_readbuffer
*
@@ -853,7 +898,19 @@ static FAR void *nxplayer_playthread(pthread_addr_t pvarg)
{
/* Read the next buffer of data */
- ret = nxplayer_readbuffer(pplayer, buffers[x]);
+ if (pplayer->tone.sample_rate)
+ {
+ /* Fill the generated tone data into apb */
+
+ ret = nxplayer_filltone(&pplayer->tone, buffers[x]);
+ }
+ else
+ {
+ /* Fill the audio data of the file into apb */
+
+ ret = nxplayer_readbuffer(pplayer, buffers[x]);
+ }
+
if (ret != OK)
{
/* nxplayer_readbuffer will return an error if there is no further
@@ -1031,7 +1088,19 @@ static FAR void *nxplayer_playthread(pthread_addr_t
pvarg)
{
/* Read the next buffer of data */
- ret = nxplayer_readbuffer(pplayer, msg.u.ptr);
+ if (pplayer->tone.sample_rate)
+ {
+ /* Fill the generated tone data into apb */
+
+ ret = nxplayer_filltone(&pplayer->tone, msg.u.ptr);
+ }
+ else
+ {
+ /* Fill the audio data of the file into apb */
+
+ ret = nxplayer_readbuffer(pplayer, msg.u.ptr);
+ }
+
if (ret != OK)
{
/* Out of data. Stay in the loop until the device sends
@@ -1177,6 +1246,10 @@ err_out:
pplayer->ops = NULL; /* Clear offload parser */
pplayer->state = NXPLAYER_STATE_IDLE; /* Go to IDLE */
+ /* Clear the tone field */
+
+ memset(&pplayer->tone, 0, sizeof(pplayer->tone));
+
pthread_mutex_unlock(&pplayer->mutex);
/* The playthread is done with the context. Release it, which may
@@ -1756,9 +1829,10 @@ int nxplayer_stop(FAR struct nxplayer_s *pplayer)
*
* Input:
* pplayer Pointer to the initialized MPlayer context
- * pfilename Pointer to the filename to play
* filefmt Format of the file or AUD_FMT_UNDEF if unknown / to be
* determined by nxplayer_playfile()
+ * subfmt Sub-Format of the file or AUD_FMT_UNDEF if unknown / to be
+ * determined by nxplayer_playfile()
* nchannels channels num (raw data playback needed)
* bpsamp bits pre sample (raw data playback needed)
* samprate samplre rate (raw data playback needed)
@@ -1775,10 +1849,9 @@ int nxplayer_stop(FAR struct nxplayer_s *pplayer)
****************************************************************************/
static int nxplayer_playinternal(FAR struct nxplayer_s *pplayer,
- FAR const char *pfilename, int filefmt,
- int subfmt, uint8_t nchannels,
- uint8_t bpsamp, uint32_t samprate,
- uint8_t chmap)
+ int filefmt, int subfmt,
+ uint8_t nchannels, uint8_t bpsamp,
+ uint32_t samprate, uint8_t chmap)
{
struct mq_attr attr;
struct sched_param sparam;
@@ -1787,97 +1860,7 @@ static int nxplayer_playinternal(FAR struct nxplayer_s
*pplayer,
struct ap_buffer_info_s buf_info;
struct audio_caps_s caps;
int min_channels;
-#ifdef CONFIG_NXPLAYER_INCLUDE_MEDIADIR
- char path[PATH_MAX];
-#endif
- int tmpsubfmt = AUDIO_FMT_UNDEF;
int ret;
- int c;
-
- DEBUGASSERT(pplayer != NULL);
- DEBUGASSERT(pfilename != NULL);
-
- if (pplayer->state != NXPLAYER_STATE_IDLE)
- {
- return -EBUSY;
- }
-
- audinfo("==============================\n");
- audinfo("Playing file %s\n", pfilename);
- audinfo("==============================\n");
-
- /* Test that the specified file exists */
-
-#ifdef CONFIG_NXPLAYER_HTTP_STREAMING_SUPPORT
- if ((pplayer->fd = _open_with_http(pfilename)) == -1)
-#else
- if ((pplayer->fd = open(pfilename, O_RDONLY)) == -1)
-#endif
- {
- /* File not found. Test if its in the mediadir */
-
-#ifdef CONFIG_NXPLAYER_INCLUDE_MEDIADIR
- snprintf(path, sizeof(path), "%s/%s", pplayer->mediadir, pfilename);
-
- if ((pplayer->fd = open(path, O_RDONLY)) == -1)
- {
-#ifdef CONFIG_NXPLAYER_MEDIA_SEARCH
- /* File not found in the media dir. Do a search */
-
- if (nxplayer_mediasearch(pplayer, pfilename, path,
- sizeof(path)) != OK)
- {
- auderr("ERROR: Could not find file\n");
- return -ENOENT;
- }
-#else
- auderr("ERROR: Could not open %s or %s\n", pfilename, path);
- return -ENOENT;
-#endif /* CONFIG_NXPLAYER_MEDIA_SEARCH */
- }
-
-#else /* CONFIG_NXPLAYER_INCLUDE_MEDIADIR */
-
- auderr("ERROR: Could not open %s\n", pfilename);
- return -ENOENT;
-#endif /* CONFIG_NXPLAYER_INCLUDE_MEDIADIR */
- }
-
-#ifdef CONFIG_NXPLAYER_FMT_FROM_EXT
- /* Try to determine the format of audio file based on the extension */
-
- if (filefmt == AUDIO_FMT_UNDEF)
- {
- filefmt = nxplayer_fmtfromextension(pplayer, pfilename, &tmpsubfmt);
- }
-#endif
-
-#ifdef CONFIG_NXPLAYER_FMT_FROM_HEADER
- /* If type not identified, then test for known header types */
-
- if (filefmt == AUDIO_FMT_UNDEF)
- {
- filefmt = nxplayer_fmtfromheader(pplayer, &subfmt, &tmpsubfmt);
- }
-#endif
-
- /* Test if we determined the file format */
-
- if (filefmt == AUDIO_FMT_UNDEF)
- {
- /* Hmmm, it's some unknown / unsupported type */
-
- auderr("ERROR: Unsupported format: %d\n", filefmt);
- ret = -ENOSYS;
- 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 */
@@ -1887,27 +1870,7 @@ static int nxplayer_playinternal(FAR struct nxplayer_s
*pplayer,
/* Error opening the device */
auderr("ERROR: nxplayer_opendevice failed: %d\n", ret);
- goto err_out_nodev;
- }
-
- for (c = 0; c < nitems(g_dec_ops); c++)
- {
- if (g_dec_ops[c].format == filefmt)
- {
- pplayer->ops = &g_dec_ops[c];
- break;
- }
- }
-
- if (!pplayer->ops)
- {
- goto err_out;
- }
-
- if (pplayer->ops->pre_parse)
- {
- ret = pplayer->ops->pre_parse(pplayer->fd, &samprate,
- &nchannels, &bpsamp);
+ return ret;
}
/* Try to reserve the device */
@@ -2033,13 +1996,6 @@ err_out:
close(pplayer->dev_fd);
pplayer->dev_fd = -1;
-err_out_nodev:
- if (0 < pplayer->fd)
- {
- close(pplayer->fd);
- pplayer->fd = -1;
- }
-
return ret;
}
@@ -2056,6 +2012,8 @@ err_out_nodev:
* pfilename Pointer to the filename to play
* filefmt Format of the file or AUD_FMT_UNDEF if unknown / to be
* determined by nxplayer_playfile()
+ * subfmt Sub-Format of audio in filename if known, AUDIO_FMT_UNDEF
+ * to let nxplayer_playfile() determine automatically
*
* Returns:
* OK File is being played
@@ -2069,14 +2027,14 @@ err_out_nodev:
int nxplayer_playfile(FAR struct nxplayer_s *pplayer,
FAR const char *pfilename, int filefmt, int subfmt)
{
- return nxplayer_playinternal(pplayer, pfilename, filefmt,
- subfmt, 0, 0, 0, 0);
+ return nxplayer_playraw(pplayer, pfilename, filefmt,
+ subfmt, 0, 0, 0, 0);
}
/****************************************************************************
* Name: nxplayer_playraw
*
- * nxplayer_playraw() tries to play the raw data file using the Audio
+ * nxplayer_playraw() tries to play the audio file using the Audio
* system. If a preferred device is specified, it will try to use that
* device otherwise it will perform a search of the Audio device files
* to find a suitable device.
@@ -2084,6 +2042,10 @@ int nxplayer_playfile(FAR struct nxplayer_s *pplayer,
* Input:
* pplayer Pointer to the initialized MPlayer context
* pfilename Pointer to the filename to play
+ * filefmt - Format of audio in filename if known, AUDIO_FMT_UNDEF
+ * to let nxplayer_playraw() determine automatically.
+ * subfmt - Sub-Format of audio in filename if known, AUDIO_FMT_UNDEF
+ * to let nxplayer_playraw() determine automatically.
* nchannels channel num
* bpsampe bit width
* samprate sample rate
@@ -2099,9 +2061,127 @@ int nxplayer_playfile(FAR struct nxplayer_s *pplayer,
****************************************************************************/
int nxplayer_playraw(FAR struct nxplayer_s *pplayer,
- FAR const char *pfilename, uint8_t nchannels,
+ FAR const char *pfilename,
+ int filefmt, int subfmt, uint8_t nchannels,
uint8_t bpsamp, uint32_t samprate, uint8_t chmap)
{
+#ifdef CONFIG_NXPLAYER_INCLUDE_MEDIADIR
+ char path[PATH_MAX];
+#endif
+ int tmpsubfmt = AUDIO_FMT_UNDEF;
+ int ret;
+ int c;
+
+ DEBUGASSERT(pplayer != NULL);
+ DEBUGASSERT(pfilename != NULL);
+
+ if (pplayer->state != NXPLAYER_STATE_IDLE)
+ {
+ return -EBUSY;
+ }
+
+ audinfo("==============================\n");
+ audinfo("Playing file %s\n", pfilename);
+ audinfo("==============================\n");
+
+ /* Test that the specified file exists */
+
+#ifdef CONFIG_NXPLAYER_HTTP_STREAMING_SUPPORT
+ if ((pplayer->fd = _open_with_http(pfilename)) == -1)
+#else
+ if ((pplayer->fd = open(pfilename, O_RDONLY)) == -1)
+#endif
+ {
+ /* File not found. Test if its in the mediadir */
+
+#ifdef CONFIG_NXPLAYER_INCLUDE_MEDIADIR
+ snprintf(path, sizeof(path), "%s/%s", pplayer->mediadir, pfilename);
+
+ if ((pplayer->fd = open(path, O_RDONLY)) == -1)
+ {
+#ifdef CONFIG_NXPLAYER_MEDIA_SEARCH
+ /* File not found in the media dir. Do a search */
+
+ if (nxplayer_mediasearch(pplayer, pfilename, path,
+ sizeof(path)) != OK)
+ {
+ auderr("ERROR: Could not find file\n");
+ return -ENOENT;
+ }
+#else
+ auderr("ERROR: Could not open %s or %s\n", pfilename, path);
+ return -ENOENT;
+#endif /* CONFIG_NXPLAYER_MEDIA_SEARCH */
+ }
+
+#else /* CONFIG_NXPLAYER_INCLUDE_MEDIADIR */
+
+ auderr("ERROR: Could not open %s\n", pfilename);
+ return -ENOENT;
+#endif /* CONFIG_NXPLAYER_INCLUDE_MEDIADIR */
+ }
+
+#ifdef CONFIG_NXPLAYER_FMT_FROM_EXT
+ /* Try to determine the format of audio file based on the extension */
+
+ if (filefmt == AUDIO_FMT_UNDEF)
+ {
+ filefmt = nxplayer_fmtfromextension(pplayer, pfilename, &tmpsubfmt);
+ }
+#endif
+
+#ifdef CONFIG_NXPLAYER_FMT_FROM_HEADER
+ /* If type not identified, then test for known header types */
+
+ if (filefmt == AUDIO_FMT_UNDEF)
+ {
+ filefmt = nxplayer_fmtfromheader(pplayer, &subfmt, &tmpsubfmt);
+ }
+#endif
+
+ /* Test if we determined the file format */
+
+ if (filefmt == AUDIO_FMT_UNDEF)
+ {
+ /* Hmmm, it's some unknown / unsupported type */
+
+ auderr("ERROR: Unsupported format: %d\n", filefmt);
+ ret = -ENOSYS;
+ goto err_out;
+ }
+
+ /* Test if we have a sub format assignment from above */
+
+ if (subfmt == AUDIO_FMT_UNDEF)
+ {
+ subfmt = tmpsubfmt;
+ }
+
+ for (c = 0; c < nitems(g_dec_ops); c++)
+ {
+ if (g_dec_ops[c].format == filefmt)
+ {
+ pplayer->ops = &g_dec_ops[c];
+ break;
+ }
+ }
+
+ if (!pplayer->ops)
+ {
+ ret = -ENOSYS;
+ goto err_out;
+ }
+
+ if (pplayer->ops->pre_parse)
+ {
+ ret = pplayer->ops->pre_parse(pplayer->fd, &samprate,
+ &nchannels, &bpsamp);
+ if (ret < 0)
+ {
+ goto err_out;
+ }
+ }
+
if (nchannels == 0)
{
nchannels = 2;
@@ -2117,8 +2197,66 @@ int nxplayer_playraw(FAR struct nxplayer_s *pplayer,
samprate = 48000;
}
- return nxplayer_playinternal(pplayer, pfilename, AUDIO_FMT_PCM, 0,
- nchannels, bpsamp, samprate, chmap);
+ ret = nxplayer_playinternal(pplayer, filefmt, subfmt,
+ nchannels, bpsamp, samprate, chmap);
+ if (ret < 0)
+ {
+ goto err_out;
+ }
+
+ return OK;
+
+err_out:
+ close(pplayer->fd);
+ pplayer->fd = -1;
+
+ return ret;
+}
+
+/****************************************************************************
+ * Name: nxplayer_playtone
+ *
+ * Plays the generated tone data using the Audio system.
+ * If a preferred device has been set, that device will be used for
+ * the playback, otherwise the first suitable device found in
+ * the /dev/audio directory will be used.
+ *
+ * Input Parameters:
+ * pplayer - Pointer to the context to initialize
+ * samprate - sample rate
+ * pitchfreq - pitch frequency
+ * duration - duration of the generated tone
+ *
+ *
+ * Returned Value:
+ * OK if device found, and playback started.
+ *
+ ****************************************************************************/
+
+int nxplayer_playtone(FAR struct nxplayer_s *pplayer, uint32_t samprate,
+ uint32_t pitchfreq, uint32_t duration)
+{
+ DEBUGASSERT(pplayer != NULL);
+
+ if (pplayer->state != NXPLAYER_STATE_IDLE)
+ {
+ return -EBUSY;
+ }
+
+ pplayer->tone.sample_rate = samprate ? samprate : 48000;
+ pplayer->tone.pitch_freq = pitchfreq ? pitchfreq : 440;
+ pplayer->tone.total_samps = (duration ? duration : 10) *
+ pplayer->tone.sample_rate;
+
+ audinfo("==============================\n");
+ audinfo("Playing tone : samprate:%" PRIu32 " HZ pitchfreq:%" PRIu32 " HZ \
+ duration:%" PRIu32 " s\n",
+ pplayer->tone.sample_rate, pplayer->tone.pitch_freq,
+ pplayer->tone.total_samps / pplayer->tone.sample_rate);
+ audinfo("==============================\n");
+
+ return nxplayer_playinternal(pplayer, AUDIO_FMT_PCM, AUDIO_FMT_UNDEF,
+ 2, 16, pplayer->tone.sample_rate, 0);
}
/****************************************************************************
@@ -2192,6 +2330,8 @@ FAR struct nxplayer_s *nxplayer_create(void)
pplayer->session = NULL;
#endif
+ memset(&pplayer->tone, 0, sizeof(pplayer->tone));
+
#ifdef CONFIG_NXPLAYER_INCLUDE_MEDIADIR
strlcpy(pplayer->mediadir, CONFIG_NXPLAYER_DEFAULT_MEDIADIR,
sizeof(pplayer->mediadir));
diff --git a/system/nxplayer/nxplayer_main.c b/system/nxplayer/nxplayer_main.c
index 5200c08f9..ca6ea07b2 100644
--- a/system/nxplayer/nxplayer_main.c
+++ b/system/nxplayer/nxplayer_main.c
@@ -27,6 +27,7 @@
#include <nuttx/config.h>
#include <nuttx/audio/audio.h>
+#include <inttypes.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
@@ -69,6 +70,7 @@ struct mp_cmd_s
static int nxplayer_cmd_quit(FAR struct nxplayer_s *pplayer, char *parg);
static int nxplayer_cmd_play(FAR struct nxplayer_s *pplayer, char *parg);
static int nxplayer_cmd_playraw(FAR struct nxplayer_s *pplayer, char *parg);
+static int nxplayer_cmd_tone(FAR struct nxplayer_s *pplayer, char *parg);
#ifdef CONFIG_NXPLAYER_INCLUDE_SYSTEM_RESET
static int nxplayer_cmd_reset(FAR struct nxplayer_s *pplayer, char *parg);
@@ -207,8 +209,8 @@ static struct mp_cmd_s g_nxplayer_cmds[] =
#endif
{
"tone",
- "freq secs",
- NULL,
+ "samplerate duration pitchfreq",
+ nxplayer_cmd_tone,
NXPLAYER_HELP_TEXT("Produce a pure tone")
},
#ifndef CONFIG_AUDIO_EXCLUDE_TONE
@@ -324,10 +326,10 @@ static int nxplayer_cmd_playraw(FAR struct nxplayer_s
*pplayer, char *parg)
/* Try to play the file specified */
- ret = nxplayer_playraw(pplayer, filename, channels,
- bpsamp, samprate, chmap);
+ ret = nxplayer_playraw(pplayer, filename, AUDIO_FMT_PCM, 0,
+ channels, bpsamp, samprate, chmap);
- /* nxplayer_playfile returned values:
+ /* nxplayer_playraw returned values:
*
* OK File is being played
* -EBUSY The media device is busy
@@ -365,6 +367,56 @@ static int nxplayer_cmd_playraw(FAR struct nxplayer_s
*pplayer, char *parg)
return ret;
}
+/****************************************************************************
+ * Name: nxplayer_cmd_tone
+ *
+ * nxplayer_cmd_tone() plays the tone using the nxplayer
+ * context.
+ *
+ ****************************************************************************/
+
+static int nxplayer_cmd_tone(FAR struct nxplayer_s *pplayer, char *parg)
+{
+ int ret;
+ uint32_t samprate = 0;
+ uint32_t pitchfreq = 0;
+ uint32_t duration = 0;
+
+ sscanf(parg, "%" PRIu32 " %" PRIu32 " %" PRIu32 "",
+ &samprate, &duration, &pitchfreq);
+
+ /* Try to play tone */
+
+ ret = nxplayer_playtone(pplayer, samprate, pitchfreq, duration);
+
+ /* nxplayer_playtone returned values:
+ *
+ * OK Tone is being played
+ * -EBUSY The media device is busy
+ * -ENODEV No audio device suitable to play the media type
+ */
+
+ switch (-ret)
+ {
+ case OK:
+ break;
+
+ case ENODEV:
+ printf("No suitable Audio Device found\n");
+ break;
+
+ case EBUSY:
+ printf("Audio device busy\n");
+ break;
+
+ default:
+ printf("Error playing tone: %d\n", -ret);
+ break;
+ }
+
+ return ret;
+}
+
/****************************************************************************
* Name: nxplayer_cmd_volume
*
