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Add SHM display for outputting directly to shared memory.

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This commit is contained in:
cnlohr 2018-05-07 23:13:06 -04:00
parent 6c6f6cb13d
commit c158ca0b5b
2 changed files with 79 additions and 2 deletions
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77
colorchord2/DisplaySHM.c Normal file
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@ -0,0 +1,77 @@
//Copyright 2015 <>< Charles Lohr under the ColorChord License.
#include "outdrivers.h"
#include "notefinder.h"
#include <stdio.h>
#include "parameters.h"
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include "color.h"
#include "DrawFunctions.h"
#include <sys/mman.h>
#include <sys/stat.h> /* For mode constants */
#include <fcntl.h> /* For O_* constants */
#include <unistd.h>
struct SHMDriver
{
int lights_file;
//int dft_file; //Not available.
//uint8_t * dft_ptr;
uint8_t * lights_ptr;
//int total_dft;
int total_leds;
};
static void SHMUpdate(void * id, struct NoteFinder*nf)
{
struct SHMDriver * d = (struct SHMDriver*)id;
if( !d->lights_file )
{
const char * shm_lights = GetParameterS( "shm_lights", 0 );
//const char * shm_dft = GetParameterS( "shm_dft", 0 ); // Not available.
if( shm_lights )
{
d->lights_file = shm_open(shm_lights, O_CREAT | O_RDWR, 0644);
ftruncate( d->lights_file, 16384 );
d->lights_ptr = mmap(0,16384, PROT_READ | PROT_WRITE, MAP_SHARED, d->lights_file, 0);
}
printf( "Got SHM: %s->%d [%p]\n", shm_lights, d->lights_file, d->lights_ptr );
}
if( d->lights_ptr )
{
memcpy( d->lights_ptr, &d->total_leds, 4 );
memcpy( d->lights_ptr + 4, OutLEDs, d->total_leds*3 );
}
}
static void SHMParams(void * id )
{
struct SHMDriver * d = (struct SHMDriver*)id;
d->total_leds = 300; RegisterValue( "leds", PAINT, &d->total_leds, sizeof( d->total_leds ));
}
static struct DriverInstances * DisplaySHM(const char * parameters)
{
struct DriverInstances * ret = malloc( sizeof( struct DriverInstances ) );
struct SHMDriver * d = ret->id = malloc( sizeof( struct SHMDriver ) );
memset( d, 0, sizeof( struct SHMDriver ) );
ret->Func = SHMUpdate;
ret->Params = SHMParams;
SHMParams( d );
return ret;
}
REGISTER_OUT_DRIVER(DisplaySHM);

4
colorchord2/Makefile
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@ -3,14 +3,14 @@ all : colorchord
RAWDRAW:=DrawFunctions.o XDriver.o
SOUND:=sound.o sound_alsa.o sound_pulse.o sound_null.o
OUTS := OutputVoronoi.o DisplayArray.o OutputLinear.o DisplayPie.o DisplayNetwork.o DisplayUSB2812.o DisplayDMX.o OutputProminent.o RecorderPlugin.o DisplayHIDAPI.o hidapi.o OutputCells.o
OUTS := OutputVoronoi.o DisplayArray.o OutputLinear.o DisplayPie.o DisplayNetwork.o DisplayUSB2812.o DisplayDMX.o OutputProminent.o RecorderPlugin.o DisplayHIDAPI.o hidapi.o OutputCells.o DisplaySHM.o
WINGCC:= i686-w64-mingw32-gcc
WINGCCFLAGS:= -g -DICACHE_FLASH_ATTR= -I../embeddedcommon -I. -O1 #-O2 -Wl,--relax -Wl,--gc-sections -ffunction-sections -fdata-sections
WINLDFLAGS:=-lwinmm -lgdi32 -lws2_32 -lsetupapi
RAWDRAWLIBS:=-lX11 -lm -lpthread -lXinerama -lXext
LDLIBS:=-lpthread -lasound -lm -lpulse-simple -lpulse -ludev
LDLIBS:=-lpthread -lasound -lm -lpulse-simple -lpulse -ludev -lrt
CFLAGS:=-g -Os -flto -Wall -ffast-math -I../embeddedcommon -I. -DICACHE_FLASH_ATTR=