From c235f09fc5ef83827ac53375015f469cd7e13eec Mon Sep 17 00:00:00 2001
From: "N.N" <matju@users.sourceforge.net>
Date: Mon, 14 Dec 2009 19:55:54 +0000
Subject: import version 0.36

svn path=/trunk/externals/august/readanysf~/; revision=12836
---
 FifoAudioFrames.cpp | 132 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 132 insertions(+)
 create mode 100644 FifoAudioFrames.cpp

(limited to 'FifoAudioFrames.cpp')

diff --git a/FifoAudioFrames.cpp b/FifoAudioFrames.cpp
new file mode 100644
index 0000000..8209ab1
--- /dev/null
+++ b/FifoAudioFrames.cpp
@@ -0,0 +1,132 @@
+#include "FifoAudioFrames.h"
+
+/*
+#define RESET		0
+#define BRIGHT 		1
+#define DIM		2
+#define UNDERLINE 	3
+#define BLINK		4
+#define REVERSE		7
+#define HIDDEN		8
+
+#define BLACK 		0
+#define RED		1
+#define GREEN		2
+#define YELLOW		3
+#define BLUE		4
+#define MAGENTA		5
+#define CYAN		6
+#define	WHITE		7
+void textcolor(int attr, int fg, int bg) {	
+	char command[13];
+	// Command is the control command to the terminal 
+	sprintf(command, "%c[%d;%d;%dm", 0x1B, attr, fg + 30, bg + 40);
+	printf("%s", command);
+}
+*/
+
+
+Fifo::Fifo(int s, gavl_audio_format_t * f) {
+	size = s  ;  
+	start = 0 ;
+	end = 0 ; 
+	count = 0;
+	format = new gavl_audio_format_t;
+	gavl_audio_format_copy(format, f);
+	fifoPtr = new gavl_audio_frame_t * [size] ;
+	for(int i=0; i < size; i++) {
+		fifoPtr[i] = gavl_audio_frame_create( format );
+	}
+	pthread_mutex_init (&mut, 0);
+	//printf("Fifo::size=%d\n", size);
+}
+
+Fifo::~Fifo() {
+	//printf("deleting fifo \n");
+	for(int i=0; i < size; i++) {
+		 gavl_audio_frame_destroy( fifoPtr[i] );
+	}
+	delete format;
+	delete[] fifoPtr;
+
+	//printf("deleted fifo \n");
+}
+
+// empty the fifo of any content
+void Fifo::Flush() {
+	pthread_mutex_lock (&mut);
+	start = 0 ; 
+	end = 0 ; 
+	count = 0;
+	//printf("Fifo::flushed size=%d\n", count);
+	pthread_mutex_unlock (&mut);
+}
+
+// push an element onto the Fifo 
+bool Fifo::Append(  gavl_audio_frame_t * source) {
+	bool ret = false;
+	//Dump("Appending a frame ");
+	pthread_mutex_lock (&mut);
+	if ( count < size  ) {  // if there is room for one more
+		int vs = gavl_audio_frame_copy(format, fifoPtr[end],  source, 0,0, format->samples_per_frame, format->samples_per_frame) ;
+		fifoPtr[end]->timestamp = source->timestamp;
+		fifoPtr[end]->valid_samples =vs;
+		if (++end >= size)
+			end = 0;
+		count++;
+		ret = true;
+	} // no room in fifo, return false
+	pthread_mutex_unlock (&mut);
+	//Dump("Appended a frame ");
+	return ret;
+}
+
+// get an element off the Fifo
+bool Fifo::Get( gavl_audio_frame_t * dest) {
+	bool ret = false;
+	//Dump("Getting a frame ");
+	pthread_mutex_lock (&mut);
+	if ( count > 0 ) {  // if there any items in the fifo
+		int vs = gavl_audio_frame_copy(format, dest, fifoPtr[start], 0, 0, format->samples_per_frame, format->samples_per_frame) ;
+		dest->timestamp = fifoPtr[start]->timestamp;
+		dest->valid_samples = vs;
+		if ( ++start >= size )
+			start = 0;
+		count--;
+		ret = true;
+	}
+	pthread_mutex_unlock (&mut);
+	//Dump("Got a frame ");
+	return ret;
+}
+/*
+void Fifo::Dump( char * c) {
+	int i,j = 0;
+	pthread_mutex_lock (&mut);
+	printf("%s -----------------------\n", c);
+	for( i=0;i<size;i++) {
+		//j=start+i;
+		//if (j >= size)
+		//	j = j -size;
+		j=i;
+		if ( j == start)
+			textcolor(BRIGHT, GREEN, BLACK);
+		if (j == end)
+			textcolor(BRIGHT, RED, BLACK);
+		if (j == end && j == start)
+			textcolor(BRIGHT, YELLOW, BLACK);
+		printf("[%d]=%ld ", j, fifoPtr[j]->timestamp);
+		textcolor(RESET, BLACK, WHITE);
+	}
+	printf("\n");
+	printf("start=%02d, end=%02d, count=%02d\n", start,end,count);
+	printf("-----------------------\n");
+	pthread_mutex_unlock (&mut);
+}
+*/
+bool Fifo::FreeSpace() { bool ret; pthread_mutex_lock(&mut); ret = (count < size);pthread_mutex_unlock (&mut);  return ret;}
+bool Fifo::isEmpty() { bool c; pthread_mutex_lock(&mut); c = (count == 0) ; pthread_mutex_unlock (&mut); return c; }
+bool Fifo::isFull()  { bool c; pthread_mutex_lock(&mut); c = (count == size ); pthread_mutex_unlock (&mut); return c; } 
+gavl_audio_format_t * Fifo::getFormat() { return format; };
+float Fifo::getSizePercentage() { float ret; pthread_mutex_lock(&mut);ret = count / (float) size; pthread_mutex_unlock (&mut); return ret;};
+
-- 
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