X-Git-Url: http://git.osdn.net/view?p=rec10%2Frec10-git.git;a=blobdiff_plain;f=tunerec%2Ftunerec.c;h=fad6b6db6e550f46fc08cadeaea1c87d54334de3;hp=6be978fa6be5aa276599269f56ddb9e3b9deec58;hb=27c2b252fe0472b2f24dc9c97aa3e8787bcb02c5;hpb=93aa0852b6dd82c77616fb2b120cfad09d1d89ce

diff --git a/tunerec/tunerec.c b/tunerec/tunerec.c
index 6be978f..fad6b6d 100755
--- a/tunerec/tunerec.c
+++ b/tunerec/tunerec.c
@@ -1,3 +1,5 @@
+#define _FILE_OFFSET_BITS 64
+
 #include <linux/dvb/frontend.h>
 #include <linux/dvb/dmx.h>
 #include <linux/dvb/audio.h>
@@ -8,8 +10,110 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
+#include <unistd.h>
+#include <errno.h>
+#include <pthread.h>
+#include <stdbool.h>
+#include <string.h>
 
 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+#ifndef DTV_STREAM_ID
+#define DTV_STREAM_ID DTV_ISDBS_TS_ID
+#endif
+#define DVB_READ_BUFFER_SIZE 188 * 128
+#define DVB_WRITE_BUFFER_SIZE 1024 * 1024
+#define DMX_BUFFER_SIZE 1024 * 1024
+#define RING_BUFFER_SIZE 1024 * 1024 * 16
+
+typedef struct {
+	void* rb_ptr;
+	int rb_wt;
+	int rb_rt;
+	int rb_ab;
+	pthread_mutex_t rb_mtx;
+} mrb;
+
+typedef struct {
+	int fin;
+	int fout;
+	int rectime;
+	mrb rb;
+	bool done;
+} my_thread_arg;
+
+void * record_read(void * priv);
+void * record_write(void * priv);
+
+// TODO: switchable between VRB(virtual ring buffer) and MRB(My Ring Buffer)
+
+void mrb_init(mrb* rb, size_t size) {
+	rb->rb_ptr = malloc(size);
+	rb->rb_wt = rb->rb_rt = rb->rb_ab = 0;
+	pthread_mutex_init(&rb->rb_mtx, NULL);
+}
+
+void mrb_destroy(mrb* rb) {
+	free(rb->rb_ptr);
+	pthread_mutex_destroy(&rb->rb_mtx);
+}
+
+size_t mrb_data_len(mrb* rb) {
+	return rb->rb_ab;
+}
+
+bool mrb_put(mrb* rb, char *source, size_t size) {
+	int partial;
+
+	if ( rb->rb_ab + size > RING_BUFFER_SIZE ) {
+		// RingBuffer overflow.
+		return false;
+	}
+	if ( rb->rb_wt + size <= RING_BUFFER_SIZE ) {
+		// written bytes + newly added bytes <= buffer max size
+		memcpy(rb->rb_ptr + rb->rb_wt, source, size);
+		rb->rb_wt = rb->rb_wt + size;
+	}
+	else {
+		// written bytes + newly added bytes > buffer max size
+		// wrap around.
+		partial = RING_BUFFER_SIZE - rb->rb_wt;
+		memcpy(rb->rb_ptr + rb->rb_wt, source, partial);
+		memcpy(rb->rb_ptr, source + partial, size - partial);
+		rb->rb_wt = rb->rb_wt + size - RING_BUFFER_SIZE;
+	}
+	pthread_mutex_lock(&rb->rb_mtx);
+	rb->rb_ab += size;
+	pthread_mutex_unlock(&rb->rb_mtx);
+
+	return true;
+}
+
+bool mrb_get(mrb* rb, char *target, size_t size) {
+	int partial;
+
+	if ( rb->rb_ab < size ) {
+		// RingBuffer underflow.
+		return false;
+	}
+	if ( rb->rb_rt + size <= rb->rb_wt ) {
+		// read bytes + newly taken bytes <= buffer max size
+		memcpy(target, rb->rb_ptr + rb->rb_rt, size);
+		rb->rb_rt = rb->rb_rt + size;
+	}
+	else {
+		// read bytes + newly taken bytes > buffer max size
+		// wrap around.
+		partial = RING_BUFFER_SIZE - rb->rb_rt;
+		memcpy(target, rb->rb_ptr + rb->rb_rt, partial);
+		memcpy(target + partial, rb->rb_ptr, size - partial);
+		rb->rb_rt = rb->rb_rt + size - RING_BUFFER_SIZE;
+	}
+	pthread_mutex_lock(&rb->rb_mtx);
+	rb->rb_ab -= size;
+	pthread_mutex_unlock(&rb->rb_mtx);
+
+	return true;
+}
 
 static int search(int adapter_nr, unsigned int frequency, unsigned int ts_id)
 {
@@ -101,9 +205,8 @@ static int track(int adapter_nr)
 void record(int adapter_nr, char* output, int rectime) {
 	int fin, fout;
 	char input[256];
-	time_t start_time, current_time;
-	char buf[1316];
-	ssize_t rt, wt, shift;
+	pthread_t read_thread, write_thread;
+	my_thread_arg arg;
 
 	fout = open(output, (O_WRONLY | O_CREAT | O_TRUNC), 0666);
 	if ( fout < 0 ) {
@@ -111,31 +214,101 @@ void record(int adapter_nr, char* output, int rectime) {
 		return;
 	}
 	sprintf(input, "/dev/dvb/adapter%d/dvr0", adapter_nr);
-	start_time = time(NULL);
 	fin = open(input, (O_RDONLY));
-	while ( ( rt = read(fin, buf, 1316) ) > 0 ) {
+	ioctl(fin, DMX_SET_BUFFER_SIZE, DMX_BUFFER_SIZE);
+
+	mrb_init(&arg.rb, RING_BUFFER_SIZE);
+	arg.done = false;
+	arg.rectime = rectime;
+	arg.fin  = fin;
+	arg.fout = fout;
+	pthread_create(&read_thread , NULL, record_read , &arg);
+	pthread_create(&write_thread, NULL, record_write, &arg);
+	pthread_join(write_thread, NULL);
+	pthread_join(read_thread, NULL);
+
+	mrb_destroy(&arg.rb);
+	close(fin);
+	close(fout);
+}
+
+void * record_read(void * priv) {
+	ssize_t rt;
+	time_t start_time, current_time;
+	char buf[DVB_READ_BUFFER_SIZE];
+	my_thread_arg* p = (my_thread_arg*)priv;
+
+	start_time = time(NULL);
+	while ( 1 ) {
+		rt = read(p->fin, buf, DVB_READ_BUFFER_SIZE);
+		//printf("read %d %d\n", p->fin, rt);
+		if ( rt == 0 ) {
+			printf("dvr0 file read failed\n");
+			goto error;
+		}
+		if ( rt < 0 ) {
+			switch (errno) {
+			case EOVERFLOW:
+				printf("read overflow, continue\n");
+				continue;
+			default:
+				printf("read finished. err=%d\n", errno);
+				goto error;
+			}
+		}
+
+		mrb_put(&p->rb, buf, rt);
+
+		// TODO: time() at each DVB_READ_BUFFER_SIZE bytes read is not efficient, reduce frequency
+		current_time = time(NULL);
+		if ( current_time - start_time > p->rectime || p->done ) {
+			break;
+		}
+	}
+	error:
+	p->done = true;
+	return NULL;
+}
+
+void * record_write(void * priv) {
+	ssize_t rt = 0, wt, shift;
+	char buf[DVB_WRITE_BUFFER_SIZE];
+	my_thread_arg* p = (my_thread_arg*)priv;
+
+	while ( 1 ) {
+		if ( mrb_get(&p->rb, buf, DVB_WRITE_BUFFER_SIZE) ) {
+			// sufficient buffer
+			rt = DVB_WRITE_BUFFER_SIZE;
+		}
+		else if ( p->done && mrb_data_len(&p->rb) > 0) {
+			// insufficient buffer, but no more buffer fill
+			rt = mrb_data_len(&p->rb);
+			mrb_get(&p->rb, buf, mrb_data_len(&p->rb));
+		}
+		else if ( p->done ) {
+			// normal exit
+			break;
+		}
+		else {
+			usleep(100);
+		}
+
 		shift = 0;
-		while ( ( wt = write(fout, buf + shift, rt) ) > 0) {
+		while ( ( wt = write(p->fout, buf + shift, rt) ) > 0) {
+			//printf("write %d %d\n", p->fout, rt);
 			rt -= wt;
 			if ( rt == 0 ) break;
 			shift += wt;
 		}
 		if ( rt > 0 ) {
 			// [buf] is not correctly written to [fout]
-			printf("output file write failed\n");
+			printf("output file write failed. err=%d\n", errno);
 			goto error;
 		}
-
-		// TODO: time() at each 1316 bytes read is not efficient, reduce frequency
-		current_time = time(NULL);
-		if ( current_time - start_time > rectime ) {
-			break;
-		}
 	}
-
 	error:
-	close(fin);
-	close(fout);
+	p->done = true;
+	return NULL;
 }
 
 int main(int argc, char *argv[]) {
@@ -146,8 +319,9 @@ int main(int argc, char *argv[]) {
 	int ret;
 	int rectime;
 
-	if (argc <= 2) {
-		fprintf(stderr, "Usage: %s adapter_nr freq tsid rectime output\n", argv[0]);
+	if (argc != 6) {
+		fprintf(stderr, "Usage  : %s adapter_nr freq tsid rectime output\n", argv[0]);
+		fprintf(stderr, "Version: 0.0.1\n");
 		return 1;
 	}
 	adapter_nr = strtol(argv[1], NULL, 0);