Raspi+MIPS wrote:
> Hi Paul,
> how do you figure out if a stream is playing? I'm also on a RasPi and
> very satisfied with SqueezeLite on the internal as well as with external
> DACs, so I spent some time to hook up a 433mhz transmitter to control rc
> power sockets to switch my speakers with the RasPi.
> Now I just need to know when to switch them on & off ... How do you
> figure out when squeezelite starts playing?
> TIA
I'm going to post my notes, as it is more informative than a diff. You
will find references to a file gpio.c. Which c source code to control
a cpio header is found on the Raspi site, I just modified that code to
be a function called relay(), rather than being a main source code.
These hooks will do the following
*turn the relay off and on, based on the power button for the player in
LMS. (Working for ASLA only)
*At the end of a playlist, there is a 300 second delay before turning
off the amp
*Starting a new playlist will turn the amp back on.
*Pausing a stream currently does nothing, although that would be easy to
add. You will see how it hooks, and then you can just add to the
pause/unpause status.
Code:
--------------------
Status Meanings
STMu - End of Playlists
STMd - End of Current Track Stream
STMf - Fetch new Stream Connection
STMo - Start Track Stream
STMn - Open New Track Stream
STMc - Stream Crossfade
STMs - Start Stream
STMt - WOrking
STMp - Pause Stream
STMr - Resume Stream
Amplifier Idle - Auto Shutoff and Startup
-------Makefile----------------
add gpio.c to the sources line
------squeezelite.h---------------
---Add to end of file
//gpio.c
void relay( int state);
// my amp state
int ampstate;
-------output.c----------------
----in *output_thread
----below the if !!alsa_open-----just before start= true
// Wake up amp
ampstate = 1;
relay(1);
// sleep(500); // Give amp time to power up before
allowing play
----just after the line if (output.state == OUTPUT_OFF
// Put Amp to Sleep
ampstate = 0;
relay(0);
// sleep(50); // let amp power down before turning off
analog out
--------slimproto.c--------------
----Add in the global varialbes
static u32_t ampidletime = 0;
static int ampidle = 0;
static int ampidle_set = 0;
extern int ampstate;
#define SLEEP_DELAY 300000
----In Function process_strm
In Case u: ampidle = 0;
In Case s: ampidle = 0;
---In Function slimproto_run
---at the beginning of the wake 100ms loop
if ((ampstate == 1) && (ampidle_set == 0) && (ampidle == 1) && (now -
ampidletime > SLEEP_DELAY) ){
ampidle_set = 1;
relay( 0);
}
if ( ampstate == 1 && ampidle_set == 1 && ampidle == 0){
ampidletime = 0;
ampidle_set = 0;
relay( 1);
}
----in the sentSTMu = true section
ampidle = 1;
ampidletime = now;
-----in the sentSTMo = true section
ampidle = 0;
--------------------
------------------------------------------------------------------------
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