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Old 07-14-2012, 12:29 AM   #141
( ͡° ͜ʖ ͡°){ʇlnɐɟ ƃǝs}Týr
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Posts: 6,586
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Join Date: Jun 2012
Location: uti gratia usura (Yao ying da ying; Mo ying da yieng)
Device: PW-WIFI|K5-3G+WIFI| K4|K3-3G|DXG|K2| Rooted Nook Touch
zcat santa.raw.gz |./Balsamic plughw:0 ./santa8kmono.wav

This doesn't actually work by the way. video is miles out of sync (I only scoop every 4 frames right now while I get it going) - also don't want the separate files - or separate inputs - or to run to mem - and various other bad things.

EDIT: I Added threading, The video is MILES out of sync but is pictures and sound.
And now not so jerky, Proof of utterly mangled concept, A true coding horror but with a little massage and some process unification I think this will get the job done.

the principle of seperate files is fundamentally flawed (as I knew it would be) but I wanted sound and vision and I got it. Time to tidy up the file handling and unify the data stream

#include <sched.h>
#include <errno.h>
#include <getopt.h>
#include <asoundlib.h>
#include <math.h>
#include <pthread.h>

// gmplay 1.5a - geekmaster's kindle video player
// Copyright (C) 2012 by geekmaster, with MIT license:
// Tested on DX,DXG,K3,K4main,K4diags,K5main,K5diags.
#include <sys/ioctl.h>     // ioctl
#include <sys/mman.h>     // mmap, munmap
#include <stdio.h>       // printf
#include <stdlib.h>     // malloc, free
#include <linux/fb.h>  // screeninfo
#include <sys/time.h> // gettimeofday
#include <unistd.h>  // usleep
#include <string.h> // memset, memcpy
#include <fcntl.h> // open, close, write
#include <time.h> // time
typedef unsigned long u64;
typedef unsigned int u32;
typedef unsigned short u16;
typedef unsigned char u8;
u32 __invalid_size_argument_for_IOC; // ioctl.h bug fix for tcc
//----- eink definitions from eink_fb.h and mxcfb.h -----
#define EU3 0x46dd
#define EU50 0x4040462e
#define EU51 0x4048462e
#define NUM_THREADS 3
struct update_area_t {int x1,y1,x2,y2,which_fx;u8 *buffer;};
struct mxcfb_rect {u32 top,left,width,height;};
struct mxcfb_alt_buffer_data {u32 phys_addr,width,height;
struct mxcfb_rect alt_update_region;};
struct mxcfb_update_data {struct mxcfb_rect update_region;
u32 waveform_mode,update_mode,update_marker;int temp;uint flags;
struct mxcfb_alt_buffer_data alt_buffer_data;};
struct mxcfb_update_data51 {struct mxcfb_rect update_region;
u32 waveform_mode,update_mode,update_marker;
u32 hist_bw_waveform_mode,hist_gray_waveform_mode;
int temp;uint flags;struct mxcfb_alt_buffer_data alt_buffer_data;};
//----- function prototypes -----
void gmplay4(void);
//void gmplay8(void);
int getmsec(void);
int gmlib(int);
//----- gmlib global vars -----
u8 *fb0=NULL;     // framebuffer pointer
int fdFB=0;      // fb0 file descriptor
int teu=0;      // eink update time
u32 fs=0;      // fb0 stride
u32 MX=0;     // xres (visible)
u32 MY=0;    // yres (visible)
u32 VY=0;   // (VY>MY): mxcfb driver
u8 ppb=0;  // pixels per byte
u32 fc=0; // frame counter
#define FBSIZE (600/8*800)

// gmlib - geekmaster function library
// op (init, update, vsync, close)
int gmlib(int op) {
	static struct update_area_t ua={0,0,600,800,21,NULL};
	static struct mxcfb_update_data ur={
	static struct mxcfb_update_data51 ur51={
	static int eupcode; static void *eupdata=NULL;
	struct fb_var_screeninfo screeninfo;
	if (GMLIB_INIT==op) { teu=getmsec(); fdFB=open("/dev/fb0",O_RDWR);
	ppb=8/screeninfo.bits_per_pixel; fs=screeninfo.xres_virtual/ppb;
	VY=screeninfo.yres_virtual; MX=screeninfo.xres; MY=screeninfo.yres;
	ua.x2=MX; ua.y2=MY; ur.update_region.width=MX; ur.update_region.height=MY;
	fb0=(u8 *)mmap(0,MY*fs,PROT_READ|PROT_WRITE,MAP_SHARED,fdFB,0); // map fb0
	if (VY>MY) { eupcode=EU50; eupdata=&ur; ur.update_mode=0;
	if (ioctl(fdFB,eupcode,eupdata)<0) { eupcode=EU51; eupdata=&ur51; }
	} else { eupcode=EU3; eupdata=&ua; }
	system("eips -f -c;eips -c"); sleep(1);
	} else if (GMLIB_UPDATE==op) {
		if (ioctl(fdFB,eupcode,eupdata)<0) system("eips ''");  // 5.1.0 fallback
	} else if (GMLIB_VSYNC==op) { while (teu>getmsec()) usleep(1000); // fb0 busy
	} else if (GMLIB_CLOSE==op) { gmlib(GMLIB_UPDATE); sleep(1); // last screen
	system("eips -f -c;eips -c"); munmap(fb0,MY*fs); close(fdFB);
	} else { return -1; }
	return 0;
// getmsec - get msec since first call
// (tick counter wraps every 12 days)
int getmsec(void) {
	int tc; static int ts=0; struct timeval tv;
	gettimeofday(&tv,NULL); tc=tv.tv_usec/1000+1000*(0xFFFFF&tv.tv_sec);
	if (0==ts) ts=tc;
	return tc-ts;

// Points to loaded WAVE file's data
unsigned char			*WavePtr;

// Size (in frames) of loaded WAVE file's data
snd_pcm_uframes_t		WaveSize;

// Sample rate
unsigned short			WaveRate;

// Bit resolution
unsigned char			WaveBits;

// Number of channels in the wave file
unsigned char			WaveChannels;

// For WAVE file loading
static const unsigned char Riff[4]	= { 'R', 'I', 'F', 'F' };
static const unsigned char Wave[4] = { 'W', 'A', 'V', 'E' };
static const unsigned char Fmt[4] = { 'f', 'm', 't', ' ' };
static const unsigned char Data[4] = { 'd', 'a', 't', 'a' };

snd_pcm_t *playback_handle;

unsigned int i,j;
int playcount;
int indexer;
int err;

// gmplay4 - play video on 4-bit fb0
void gmplay4(void) {

	// We should scoop info from the unified file - and possibly via an indirect buffer.
	// Time indexing lookup - perhaps via a mutex provsioned RO value might be an idea
	// They are both TODO

	u32 i,x,y,b,p,off=(MY/2-400)*fs+MX/4-150,fbsize=FBSIZE; u8 fbt[FBSIZE];
	while (fread(fbt,fbsize,1,stdin)) { teu+=130; // teu: next update time
	if (getmsec()>teu+1000) continue; // drop frame if > 1 sec behind
	// gmlib(GMLIB_VSYNC); // wait for fb0 ready
	for (y=0;y<800;y++) for (x=0;x<600;x+=8) {
		b=fbt[600/8*y+x/8]; i=y*fs+x/2+off;
		p=(b&1)*240; b>>=1; fb0[i]=p|(b&1)*15; b>>=1;
		p=(b&1)*240; b>>=1; fb0[i+1]=p|(b&1)*15; b>>=1;
		p=(b&1)*240; b>>=1; fb0[i+2]=p|(b&1)*15; b>>=1;
		p=(b&1)*240; b>>=1; fb0[i+3]=p|(b&1)*15;
	} fc++; gmlib(GMLIB_UPDATE);

	//   printf("did this");

playback_callback (snd_pcm_sframes_t nframes)

	indexer = (4096*(playcount*2));

	if ((err = snd_pcm_writei (playback_handle, WavePtr+indexer, nframes)) < 0) {
		fprintf (stderr, "write failed (%s)\n", snd_strerror (err));
	return err;


#pragma pack (1)
/////////////////////// WAVE File Stuff /////////////////////
// An IFF file header looks like this
typedef struct _FILE_head
	unsigned char	ID[4];
	// could be {'R', 'I', 'F', 'F'} or {'F', 'O', 'R', 'M'}
	unsigned int	Length;
	// Length of subsequent file (including remainder of header).
	//This is in Intel reverse byte order if RIFF, Motorola format if FORM.
	unsigned char	Type[4];
	// {'W', 'A', 'V', 'E'} or {'A', 'I', 'F', 'F'}
} FILE_head;

// An IFF chunk header looks like this
typedef struct _CHUNK_head
	unsigned char ID[4];	// 4 ascii chars that is the chunk ID
	unsigned int	Length;	// Length of subsequent data within this chunk. This is in Intel reverse byte
	// order if RIFF, Motorola format if FORM. Note: this doesn't include any
	// extra byte needed to pad the chunk out to an even size.
} CHUNK_head;

// WAVE fmt chunk
typedef struct _FORMAT {
	short				wFormatTag;
	unsigned short	wChannels;
	unsigned int	dwSamplesPerSec;
	unsigned int	dwAvgBytesPerSec;
	unsigned short	wBlockAlign;
	unsigned short	wBitsPerSample;
	// Note: there may be additional fields here, depending upon wFormatTag
#pragma pack()

/********************** compareID() *********************
 * Compares the passed ID str (ie, a ptr to 4 Ascii
 * bytes) with the ID at the passed ptr. Returns TRUE if
 * a match, FALSE if not.

static unsigned char compareID(const unsigned char * id, unsigned char * ptr)
	register unsigned char i = 4;

	while (i--)
		if ( *(id)++ != *(ptr)++ ) return(0);

/********************** waveLoad() *********************
 * Loads a WAVE file.
 * fn =			Filename to load.
 * RETURNS: 0 if success, non-zero if not.
 * NOTE: Sets the global "WavePtr" to an allocated buffer
 * containing the wave data, and "WaveSize" to the size
 * in sample points.


static unsigned char waveLoad(const char *fn)
	const char				*message;
	FILE_head				head;
	register int			inHandle;

	if ((inHandle = open(fn, O_RDONLY)) == -1)
		message = "didn't open";

	// Read in IFF File header
		if (read(inHandle, &head, sizeof(FILE_head)) == sizeof(FILE_head))
			// Is it a RIFF and WAVE?
			if (!compareID(&Riff[0], &head.ID[0]) || !compareID(&Wave[0], &head.Type[0]))
				message = "is not a WAVE file";
				goto bad;

			// Read in next chunk header
			while (read(inHandle, &head, sizeof(CHUNK_head)) == sizeof(CHUNK_head))
				// ============================ Is it a fmt chunk? ===============================
				if (compareID(&Fmt[0], &head.ID[0]))
					FORMAT	format;

					// Read in the remainder of chunk
					if (read(inHandle, &format.wFormatTag, sizeof(FORMAT)) != sizeof(FORMAT)) break;

					// Can't handle compressed WAVE files
					if (format.wFormatTag != 1)
						message = "compressed WAVE not supported";
						goto bad;

					WaveBits = (unsigned char)format.wBitsPerSample;
					WaveRate = (unsigned short)format.dwSamplesPerSec;
					WaveChannels = format.wChannels;

				// ============================ Is it a data chunk? ===============================
				else if (compareID(&Data[0], &head.ID[0]))
					// Size of wave data is head.Length. Allocate a buffer and read in the wave data
					if (!(WavePtr = (unsigned char *)malloc(head.Length)))
						message = "won't fit in RAM";
						goto bad;

					if (read(inHandle, WavePtr, head.Length) != head.Length)

					// Store size (in frames)
					WaveSize = (head.Length * 8) / ((unsigned int)WaveBits * (unsigned int)WaveChannels);


				// ============================ Skip this chunk ===============================
					if (head.Length & 1) ++head.Length;  // If odd, round it up to account for pad byte
					lseek(inHandle, head.Length, SEEK_CUR);

		message = "is a bad WAVE file";
		bad:	close(inHandle);

	printf("%s %s\n", fn, message);

/*********************** free_wave_data() *********************
 * Frees any wave data we loaded.
 * NOTE: A pointer to the wave data be in the global
 * "WavePtr".

static void free_wave_data(void)
	if (WavePtr) free(WavePtr);
	WavePtr = 0;

// Showtime

main (int argc, char *argv[])

	int i;

	char *wavename = argv[2];

	if (!waveLoad(wavename))
		register int		err;

		printf("Loaded: %s\n", wavename);


	snd_pcm_hw_params_t *hw_params;
	snd_pcm_sw_params_t *sw_params;
	snd_pcm_sframes_t frames_to_deliver;
	int nfds;
	int err;
	struct pollfd *pfds;

	if ((err = snd_pcm_open (&playback_handle, argv[1], SND_PCM_STREAM_PLAYBACK, 0)) < 0) {
		fprintf (stderr, "cannot open audio device %s (%s)\n",
				snd_strerror (err));
		exit (1);

	if ((err = snd_pcm_set_params(playback_handle,
			900000)) < 0) {   /* 0.5sec */
		printf("Playback open error: %s\n", snd_strerror(err));

	/* tell ALSA to wake us up whenever 4096 or more frames
		   of playback data can be delivered. Also, tell
		   ALSA that we'll start the device ourselves.

	if ((err = snd_pcm_sw_params_malloc (&sw_params)) < 0) {
		fprintf (stderr, "cannot allocate software parameters structure (%s)\n",
				snd_strerror (err));
		exit (1);
	if ((err = snd_pcm_sw_params_current (playback_handle, sw_params)) < 0) {
		fprintf (stderr, "cannot initialize software parameters structure (%s)\n",
				snd_strerror (err));
		exit (1);
	if ((err = snd_pcm_sw_params_set_avail_min (playback_handle, sw_params, 4096)) < 0) {
		fprintf (stderr, "cannot set minimum available count (%s)\n",
				snd_strerror (err));
		exit (1);
	if ((err = snd_pcm_sw_params_set_start_threshold (playback_handle, sw_params, 0U)) < 0) {
		fprintf (stderr, "cannot set start mode (%s)\n",
				snd_strerror (err));
		exit (1);
	if ((err = snd_pcm_sw_params (playback_handle, sw_params)) < 0) {
		fprintf (stderr, "cannot set software parameters (%s)\n",
				snd_strerror (err));
		exit (1);

	/* the interface will interrupt the kernel every 4096 frames, and ALSA
		   will wake up this program very soon after that.

	if ((err = snd_pcm_prepare (playback_handle)) < 0) {
		fprintf (stderr, "cannot prepare audio interface for use (%s)\n",
				snd_strerror (err));
		exit (1);


	pthread_t threads[NUM_THREADS];
	int rc;
	long t;


	// Make a thread

	printf("In main: creating thread %ld\n", t);
	char *message1 = "Video Thread";

	// This is the thread.

	rc = pthread_create(&threads[t], NULL, gmplay4, (void*) message1);

	if (rc){
		printf("ERROR; return code from pthread_create() is %d\n", rc);
		i=getmsec()/100; printf("%d frames in %0.1f secs = %2.1f FPS\n",


	while (1) {


		// We should create a buffer area to scoop audio into from the main feed -
		// as audio is bloody picky about actually playing
		// it would be nice to consider some type of time indexing for this I guess to give us a sense of info unity.

		/* wait till the interface is ready for data, or 1 second
			   has elapsed.

		if ((err = snd_pcm_wait (playback_handle, 1000)) < 0) {
			fprintf (stderr, "poll failed (%s)\n", strerror (errno));

		/* find out how much space is available for playback data */

		if ((frames_to_deliver = snd_pcm_avail_update (playback_handle)) < 0) {
			if (frames_to_deliver == -EPIPE) {
				fprintf (stderr, "an xrun occured\n");
			} else {
				fprintf (stderr, "unknown ALSA avail update return value (%d)\n",

		if (	frames_to_deliver > 4096 ){ frames_to_deliver = 4096;}

		/* deliver the data */

		if (playback_callback (frames_to_deliver) != frames_to_deliver) {
			fprintf (stderr, "playback callback failed\n");
	i=getmsec()/100; printf("%d frames in %0.1f secs = %2.1f FPS\n",
	snd_pcm_close (playback_handle);
	exit (0);

Tomorrows job - make this actually work at all heheheh still sound and video together is always good, however mangled and wrong

It's the future.

Last edited by twobob; 07-14-2012 at 11:37 AM. Reason: added call structure, and some sense - and partial success
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