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nuttx-apps/system/nxplayer/nxplayer_main.c
anchao 25b92edd9f Squashed commit of the following: 
apps/builtin/exec_builtin.c:  Try posix_spawn if builtin apps do not have have an entry point.
    apps/Application.mk: introduce MODULE config to simplify tristate(m)
    apps/nsh:  Change the nuttx shell module type to tristate
    apps:  Add loadable application support
    script/mksymtab:  Generate symbol table name by default
    apps/builtin:  Allow loadable applications can register with apps/builtin.
2018-08-22 09:30:38 -06:00

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/****************************************************************************
* apps/system/nxplayer/nxplayer_main.c
*
* Copyright (C) 2013 Ken Pettit. All rights reserved.
* Author: Ken Pettit <pettitkd@gmail.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/audio/audio.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <assert.h>
#include "system/readline.h"
#include "system/nxplayer.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#define NXPLAYER_VER "1.05"
#ifdef CONFIG_NXPLAYER_INCLUDE_HELP
# define NXPLAYER_HELP_TEXT(x) #x
#else
# define NXPLAYER_HELP_TEXT(x)
#endif
/****************************************************************************
* Private Type Declarations
****************************************************************************/
struct mp_cmd_s {
const char *cmd; /* The command text */
const char *arghelp; /* Text describing the args */
nxplayer_func pFunc; /* Pointer to command handler */
const char *help; /* The help text */
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static int nxplayer_cmd_quit(FAR struct nxplayer_s *pPlayer, char *parg);
static int nxplayer_cmd_play(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);
#endif
#ifdef CONFIG_NXPLAYER_INCLUDE_PREFERRED_DEVICE
static int nxplayer_cmd_device(FAR struct nxplayer_s *pPlayer, char *parg);
#endif
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
static int nxplayer_cmd_pause(FAR struct nxplayer_s *pPlayer, char *parg);
static int nxplayer_cmd_resume(FAR struct nxplayer_s *pPlayer, char *parg);
#endif
#ifdef CONFIG_NXPLAYER_INCLUDE_MEDIADIR
static int nxplayer_cmd_mediadir(FAR struct nxplayer_s *pPlayer, char *parg);
#endif
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
static int nxplayer_cmd_stop(FAR struct nxplayer_s *pPlayer, char *parg);
#endif
#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
static int nxplayer_cmd_volume(FAR struct nxplayer_s *pPlayer, char *parg);
#ifndef CONFIG_AUDIO_EXCLUDE_BALANCE
static int nxplayer_cmd_balance(FAR struct nxplayer_s *pPlayer, char *parg);
#endif
#endif
#ifndef CONFIG_AUDIO_EXCLUDE_TONE
static int nxplayer_cmd_bass(FAR struct nxplayer_s *pPlayer, char *parg);
static int nxplayer_cmd_treble(FAR struct nxplayer_s *pPlayer, char *parg);
#endif
#ifdef CONFIG_NXPLAYER_INCLUDE_HELP
static int nxplayer_cmd_help(FAR struct nxplayer_s *pPlayer, char *parg);
#endif
/****************************************************************************
* Private Data
****************************************************************************/
static struct mp_cmd_s g_nxplayer_cmds[] =
{
#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
#ifndef CONFIG_AUDIO_EXCLUDE_BALANCE
{ "balance", "d%", nxplayer_cmd_balance, NXPLAYER_HELP_TEXT(Set balance percentage (< 50% means more left)) },
#endif
#endif
#ifndef CONFIG_AUDIO_EXCLUDE_TONE
{ "bass", "d%", nxplayer_cmd_bass, NXPLAYER_HELP_TEXT(Set bass level percentage) },
#endif
#ifdef CONFIG_NXPLAYER_INCLUDE_PREFERRED_DEVICE
{ "device", "devfile", nxplayer_cmd_device, NXPLAYER_HELP_TEXT(Specify a preferred audio device) },
#endif
#ifdef CONFIG_NXPLAYER_INCLUDE_HELP
{ "h", "", nxplayer_cmd_help, NXPLAYER_HELP_TEXT(Display help for commands) },
{ "help", "", nxplayer_cmd_help, NXPLAYER_HELP_TEXT(Display help for commands) },
#endif
#ifdef CONFIG_NXPLAYER_INCLUDE_MEDIADIR
{ "mediadir", "path", nxplayer_cmd_mediadir, NXPLAYER_HELP_TEXT(Change the media directory) },
#endif
{ "play", "filename", nxplayer_cmd_play, NXPLAYER_HELP_TEXT(Play a media file) },
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
{ "pause", "", nxplayer_cmd_pause, NXPLAYER_HELP_TEXT(Pause playback) },
#endif
#ifdef CONFIG_NXPLAYER_INCLUDE_SYSTEM_RESET
{ "reset", "", nxplayer_cmd_reset, NXPLAYER_HELP_TEXT(Perform a HW reset) },
#endif
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
{ "resume", "", nxplayer_cmd_resume, NXPLAYER_HELP_TEXT(Resume playback) },
#endif
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
{ "stop", "", nxplayer_cmd_stop, NXPLAYER_HELP_TEXT(Stop playback) },
#endif
{ "tone", "freq secs", NULL, NXPLAYER_HELP_TEXT(Produce a pure tone) },
#ifndef CONFIG_AUDIO_EXCLUDE_TONE
{ "treble", "d%", nxplayer_cmd_treble, NXPLAYER_HELP_TEXT(Set treble level percentage) },
#endif
{ "q", "", nxplayer_cmd_quit, NXPLAYER_HELP_TEXT(Exit NxPlayer) },
{ "quit", "", nxplayer_cmd_quit, NXPLAYER_HELP_TEXT(Exit NxPlayer) },
#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
{ "volume", "d%", nxplayer_cmd_volume, NXPLAYER_HELP_TEXT(Set volume to level specified) }
#endif
};
static const int g_nxplayer_cmd_count = sizeof(g_nxplayer_cmds) / sizeof(struct mp_cmd_s);
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: nxplayer_cmd_play
*
* nxplayer_cmd_play() plays the specified media file using the nxplayer
* context.
*
****************************************************************************/
static int nxplayer_cmd_play(FAR struct nxplayer_s *pPlayer, char *parg)
{
int ret;
/* Try to play the file specified */
ret = nxplayer_playfile(pPlayer, parg, AUDIO_FMT_UNDEF, AUDIO_FMT_UNDEF);
/* nxplayer_playfile returned values:
*
* OK File is being played
* -EBUSY The media device is busy
* -ENOSYS The media file is an unsupported type
* -ENODEV No audio device suitable to play the media type
* -ENOENT The media file was not found
*/
switch (-ret)
{
case OK:
break;
case ENODEV:
printf("No suitable Audio Device found\n");
break;
case EBUSY:
printf("Audio device busy\n");
break;
case ENOENT:
printf("File %s not found\n", parg);
break;
case ENOSYS:
printf("Unknown audio format\n");
break;
default:
printf("Error playing file: %d\n", -ret);
break;
}
return ret;
}
/****************************************************************************
* Name: nxplayer_cmd_volume
*
* nxplayer_cmd_volume() sets the volume level.
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
static int nxplayer_cmd_volume(FAR struct nxplayer_s *pPlayer, char *parg)
{
uint16_t percent;
/* If no arg given, then print current volume */
if (parg == NULL || *parg == '\0')
{
printf("volume: %d\n", pPlayer->volume / 10);
}
else
{
/* Get the percentage value from the argument */
percent = (uint16_t) (atof(parg) * 10.0);
nxplayer_setvolume(pPlayer, percent);
}
return OK;
}
#endif
/****************************************************************************
* Name: nxplayer_cmd_bass
*
* nxplayer_cmd_bass() sets the bass level and range.
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_TONE
static int nxplayer_cmd_bass(FAR struct nxplayer_s *pPlayer, char *parg)
{
uint8_t level_percent;
/* If no arg given, then print current bass */
if (parg == NULL || *parg == '\0')
{
printf("bass: %d\n", pPlayer->bass);
}
else
{
/* Get the level and range percentage value from the argument */
level_percent = (uint8_t) atoi(parg);
nxplayer_setbass(pPlayer, level_percent);
}
return OK;
}
#endif
/****************************************************************************
* Name: nxplayer_cmd_treble
*
* nxplayer_cmd_treble() sets the treble level and range.
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_TONE
static int nxplayer_cmd_treble(FAR struct nxplayer_s *pPlayer, char *parg)
{
uint8_t level_percent;
/* If no arg given, then print current bass */
if (parg == NULL || *parg == '\0')
{
printf("treble: %d\n", pPlayer->treble);
}
else
{
/* Get the level and range percentage value from the argument */
level_percent = (uint8_t) atoi(parg);
nxplayer_settreble(pPlayer, level_percent);
}
return OK;
}
#endif
/****************************************************************************
* Name: nxplayer_cmd_balance
*
* nxplayer_cmd_balance() sets the balance level.
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_VOLUME
#ifndef CONFIG_AUDIO_EXCLUDE_BALANCE
static int nxplayer_cmd_balance(FAR struct nxplayer_s *pPlayer, char *parg)
{
uint16_t percent;
/* If no arg given, then print current volume */
if (parg == NULL || *parg == '\0')
{
printf("balance: %d\n", pPlayer->volume / 10);
}
else
{
/* Get the percentage value from the argument */
percent = (uint16_t) (atof(parg) * 10.0);
nxplayer_setbalance(pPlayer, percent);
}
return OK;
}
#endif
#endif
/****************************************************************************
* Name: nxplayer_cmd_reset
*
* nxplayer_cmd_reset() performs a HW reset of all the audio devices.
*
****************************************************************************/
#ifdef CONFIG_NXPLAYER_INCLUDE_SYSTEM_RESET
static int nxplayer_cmd_reset(FAR struct nxplayer_s *pPlayer, char *parg)
{
nxplayer_systemreset(pPlayer);
return OK;
}
#endif
/****************************************************************************
* Name: nxplayer_cmd_mediadir
*
* nxplayer_cmd_mediadir() displays or changes the media directory
* context.
*
****************************************************************************/
#ifdef CONFIG_NXPLAYER_INCLUDE_MEDIADIR
static int nxplayer_cmd_mediadir(FAR struct nxplayer_s *pPlayer, char *parg)
{
/* If no arg given, then print current media dir */
if (parg == NULL || *parg == '\0')
printf("%s\n", pPlayer->mediadir);
else
nxplayer_setmediadir(pPlayer, parg);
return OK;
}
#endif
/****************************************************************************
* Name: nxplayer_cmd_stop
*
* nxplayer_cmd_stop() stops playback of currently playing file
* context.
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
static int nxplayer_cmd_stop(FAR struct nxplayer_s *pPlayer, char *parg)
{
/* Stop the playback */
nxplayer_stop(pPlayer);
return OK;
}
#endif
/****************************************************************************
* Name: nxplayer_cmd_pause
*
* nxplayer_cmd_pause() pauses playback of currently playing file
* context.
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
static int nxplayer_cmd_pause(FAR struct nxplayer_s *pPlayer, char *parg)
{
/* Pause the playback */
nxplayer_pause(pPlayer);
return OK;
}
#endif
/****************************************************************************
* Name: nxplayer_cmd_resume
*
* nxplayer_cmd_resume() resumes playback of currently playing file
* context.
*
****************************************************************************/
#ifndef CONFIG_AUDIO_EXCLUDE_PAUSE_RESUME
static int nxplayer_cmd_resume(FAR struct nxplayer_s *pPlayer, char *parg)
{
/* Resume the playback */
nxplayer_resume(pPlayer);
return OK;
}
#endif
/****************************************************************************
* Name: nxplayer_cmd_device
*
* nxplayer_cmd_device() sets the preferred audio device for playback
*
****************************************************************************/
#ifdef CONFIG_NXPLAYER_INCLUDE_PREFERRED_DEVICE
static int nxplayer_cmd_device(FAR struct nxplayer_s *pPlayer, char *parg)
{
int ret;
char path[32];
/* First try to open the file directly */
ret = nxplayer_setdevice(pPlayer, parg);
if (ret == -ENOENT)
{
/* Append the /dev/audio path and try again */
#ifdef CONFIG_AUDIO_CUSTOM_DEV_PATH
#ifdef CONFIG_AUDIO_DEV_ROOT
snprintf(path, sizeof(path), "/dev/%s", parg);
#else
snprintf(path, sizeof(path), CONFIG_AUDIO_DEV_PATH "/%s", parg);
#endif
#else
snprintf(path, sizeof(path), "/dev/audio/%s", parg);
#endif
ret = nxplayer_setdevice(pPlayer, path);
}
/* Test if the device file exists */
if (ret == -ENOENT)
{
/* Device doesn't exit. Report error */
printf("Device %s not found\n", parg);
return ret;
}
/* Test if is is an audio device */
if (ret == -ENODEV)
{
printf("Device %s is not an audio device\n", parg);
return ret;
}
if (ret < 0)
{
return ret;
}
/* Device set successfully */
return OK;
}
#endif /* CONFIG_NXPLAYER_INCLUDE_PREFERRED_DEVICE */
/****************************************************************************
* Name: nxplayer_cmd_quit
*
* nxplayer_cmd_quit() terminates the application
****************************************************************************/
static int nxplayer_cmd_quit(FAR struct nxplayer_s *pPlayer, char *parg)
{
/* Stop the playback if any */
#ifndef CONFIG_AUDIO_EXCLUDE_STOP
nxplayer_stop(pPlayer);
#endif
return OK;
}
/****************************************************************************
* Name: nxplayer_cmd_help
*
* nxplayer_cmd_help() displays the application's help information on
* supported commands and command syntax.
****************************************************************************/
#ifdef CONFIG_NXPLAYER_INCLUDE_HELP
static int nxplayer_cmd_help(FAR struct nxplayer_s *pPlayer, char *parg)
{
int x, len, maxlen = 0;
int c;
/* Calculate length of longest cmd + arghelp */
for (x = 0; x < g_nxplayer_cmd_count; x++)
{
len = strlen(g_nxplayer_cmds[x].cmd) + strlen(g_nxplayer_cmds[x].arghelp);
if (len > maxlen)
maxlen = len;
}
printf("NxPlayer commands\n================\n");
for (x = 0; x < g_nxplayer_cmd_count; x++)
{
/* Print the command and it's arguments */
printf(" %s %s", g_nxplayer_cmds[x].cmd, g_nxplayer_cmds[x].arghelp);
/* Calculate number of spaces to print before the help text */
len = maxlen - (strlen(g_nxplayer_cmds[x].cmd) + strlen(g_nxplayer_cmds[x].arghelp));
for (c = 0; c < len; c++)
printf(" ");
printf(" : %s\n", g_nxplayer_cmds[x].help);
}
return OK;
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxplayer
*
* nxplayer() reads in commands from the console using the readline
* system add-in and implemets a command-line based media player that
* uses the NuttX audio system to play media files read in from the
* file system. Commands are provided for setting volume, base and
* other audio features, as well as for pausing and stoping the
* playback.
*
* Input Parameters:
* buf - The user allocated buffer to be filled.
* buflen - the size of the buffer.
* instream - The stream to read characters from
* outstream - The stream to each characters to.
*
* Returned values:
* On success, the (positive) number of bytes transferred is returned.
* EOF is returned to indicate either an end of file condition or a
* failure.
*
****************************************************************************/
#ifdef CONFIG_BUILD_LOADABLE
int main(int argc, FAR char *argv[])
#else
int nxplayer_main(int argc, char *argv[])
#endif
{
char buffer[64];
int len, x, running;
char *cmd, *arg;
FAR struct nxplayer_s *pPlayer;
printf("NxPlayer version " NXPLAYER_VER "\n");
printf("h for commands, q to exit\n");
printf("\n");
/* Initialize our NxPlayer context */
pPlayer = nxplayer_create();
if (pPlayer == NULL)
{
printf("Error: Out of RAM\n");
return -ENOMEM;
}
/* Loop until the user exits */
running = TRUE;
while (running)
{
/* Print a prompt */
printf("nxplayer> ");
fflush(stdout);
/* Read a line from the terminal */
len = readline(buffer, sizeof(buffer), stdin, stdout);
buffer[len] = '\0';
if (len > 0)
{
if (buffer[len-1] == '\n')
buffer[len-1] = '\0';
/* Parse the command from the argument */
cmd = strtok_r(buffer, " \n", &arg);
if (cmd == NULL)
continue;
/* Remove leading spaces from arg */
while (*arg == ' ')
arg++;
/* Find the command in our cmd array */
for (x = 0; x < g_nxplayer_cmd_count; x++)
{
if (strcmp(cmd, g_nxplayer_cmds[x].cmd) == 0)
{
/* Command found. Call it's handler if not NULL */
if (g_nxplayer_cmds[x].pFunc != NULL)
g_nxplayer_cmds[x].pFunc(pPlayer, arg);
/* Test if it is a quit command */
if (g_nxplayer_cmds[x].pFunc == nxplayer_cmd_quit)
running = FALSE;
break;
}
}
/* Test for Unknown command */
if (x == g_nxplayer_cmd_count)
printf("%s: unknown nxplayer command\n", buffer);
}
}
/* Release the NxPlayer context */
/* nxplayer_detach(pPlayer); */
nxplayer_release(pPlayer);
return OK;
}
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