Version 0.1.0 from FTP

git-svn-id: http://svn.digium.com/svn/asterisk/trunk@65 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 268 insertions, 0 deletions

diff --git a/formats/format_mp3.c b/formats/format_mp3.c
new file mode 100755
index 000000000..811acbe14
--- /dev/null
+++ b/formats/format_mp3.c
@@ -0,0 +1,268 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Everybody's favorite format: MP3 Files!  Yay!
+ * 
+ * Copyright (C) 1999, Adtran Inc. and Linux Support Services, LLC
+ *
+ * Mark Spencer <markster@linux-support.net>
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ */
+ 
+#include <asterisk/channel.h>
+#include <asterisk/file.h>
+#include <asterisk/logger.h>
+#include <asterisk/sched.h>
+#include <asterisk/module.h>
+#include <arpa/inet.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <pthread.h>
+#include <sys/time.h>
+#include "../channels/adtranvofr.h"
+
+
+#define MP3_MAX_SIZE 1400
+
+struct ast_filestream {
+	/* First entry MUST be reserved for the channel type */
+	void *reserved[AST_RESERVED_POINTERS];
+	/* This is what a filestream means to us */
+	int fd; /* Descriptor */
+	struct ast_channel *owner;
+	struct ast_filestream *next;
+	struct ast_frame *fr;	/* Frame representation of buf */
+	char buf[sizeof(struct ast_frame) + MP3_MAX_SIZE + AST_FRIENDLY_OFFSET];	/* Buffer for sending frames, etc */
+	int pos;
+};
+
+
+static struct ast_filestream *glist = NULL;
+static pthread_mutex_t mp3_lock = PTHREAD_MUTEX_INITIALIZER;
+static int glistcnt = 0;
+
+static char *name = "mp3";
+static char *desc = "MPEG-2 Layer 3 File Format Support";
+static char *exts = "mp3|mpeg3";
+
+#if 0
+#define MP3_FRAMELEN 417
+#else
+#define MP3_FRAMELEN 400
+#endif
+#define MP3_OUTPUTLEN 2304	/* Bytes */
+#define MP3_TIMELEN ((MP3_OUTPUTLEN * 1000 / 16000) )
+
+static struct ast_filestream *mp3_open(int fd)
+{
+	/* We don't have any header to read or anything really, but
+	   if we did, it would go here.  We also might want to check
+	   and be sure it's a valid file.  */
+	struct ast_filestream *tmp;
+	if ((tmp = malloc(sizeof(struct ast_filestream)))) {
+		if (pthread_mutex_lock(&mp3_lock)) {
+			ast_log(LOG_WARNING, "Unable to lock mp3 list\n");
+			free(tmp);
+			return NULL;
+		}
+		tmp->next = glist;
+		glist = tmp;
+		tmp->fd = fd;
+		tmp->owner = NULL;
+		tmp->fr = (struct ast_frame *)tmp->buf;
+		tmp->fr->data = tmp->buf + sizeof(struct ast_frame);
+		tmp->fr->frametype = AST_FRAME_VOICE;
+		tmp->fr->subclass = AST_FORMAT_MP3;
+		/* datalen will vary for each frame */
+		tmp->fr->src = name;
+		tmp->fr->mallocd = 0;
+		glistcnt++;
+		pthread_mutex_unlock(&mp3_lock);
+		ast_update_use_count();
+	}
+	return tmp;
+}
+
+static struct ast_filestream *mp3_rewrite(int fd, char *comment)
+{
+	/* We don't have any header to read or anything really, but
+	   if we did, it would go here.  We also might want to check
+	   and be sure it's a valid file.  */
+	struct ast_filestream *tmp;
+	if ((tmp = malloc(sizeof(struct ast_filestream)))) {
+		if (pthread_mutex_lock(&mp3_lock)) {
+			ast_log(LOG_WARNING, "Unable to lock mp3 list\n");
+			free(tmp);
+			return NULL;
+		}
+		tmp->next = glist;
+		glist = tmp;
+		tmp->fd = fd;
+		tmp->owner = NULL;
+		tmp->fr = NULL;
+		glistcnt++;
+		pthread_mutex_unlock(&mp3_lock);
+		ast_update_use_count();
+	} else
+		ast_log(LOG_WARNING, "Out of memory\n");
+	return tmp;
+}
+
+static struct ast_frame *mp3_read(struct ast_filestream *s)
+{
+	return NULL;
+}
+
+static void mp3_close(struct ast_filestream *s)
+{
+	struct ast_filestream *tmp, *tmpl = NULL;
+	if (pthread_mutex_lock(&mp3_lock)) {
+		ast_log(LOG_WARNING, "Unable to lock mp3 list\n");
+		return;
+	}
+	tmp = glist;
+	while(tmp) {
+		if (tmp == s) {
+			if (tmpl)
+				tmpl->next = tmp->next;
+			else
+				glist = tmp->next;
+			break;
+		}
+		tmpl = tmp;
+		tmp = tmp->next;
+	}
+	glistcnt--;
+	if (s->owner) {
+		s->owner->stream = NULL;
+		if (s->owner->streamid > -1)
+			ast_sched_del(s->owner->sched, s->owner->streamid);
+		s->owner->streamid = -1;
+	}
+	pthread_mutex_unlock(&mp3_lock);
+	ast_update_use_count();
+	if (!tmp) 
+		ast_log(LOG_WARNING, "Freeing a filestream we don't seem to own\n");
+	close(s->fd);
+	free(s);
+}
+
+static int ast_read_callback(void *data)
+{
+	/* XXX Don't assume frames are this size XXX */
+	u_int16_t size=MP3_FRAMELEN;
+	u_int32_t delay = -1;
+	int res;
+	struct ast_filestream *s = data;
+	/* Send a frame from the file to the appropriate channel */
+	/* Read the data into the buffer */
+	s->fr->offset = AST_FRIENDLY_OFFSET;
+	s->fr->datalen = size;
+	s->fr->data = s->buf + sizeof(struct ast_frame) + AST_FRIENDLY_OFFSET;
+	if ((res = read(s->fd, s->fr->data , size)) != size) {
+		ast_log(LOG_WARNING, "Short read (%d of %d bytes) (%s)!\n", res, size, strerror(errno));
+		s->owner->streamid = -1;
+		return 0;
+	}
+	delay = MP3_TIMELEN;
+	s->fr->timelen = delay;
+	/* Lastly, process the frame */
+	if (ast_write(s->owner, s->fr)) {
+		ast_log(LOG_WARNING, "Failed to write frame\n");
+		s->owner->streamid = -1;
+		return 0;
+	}
+	return -1;
+}
+
+static int mp3_apply(struct ast_channel *c, struct ast_filestream *s)
+{
+	/* Select our owner for this stream, and get the ball rolling. */
+	s->owner = c;
+	s->owner->streamid = ast_sched_add(s->owner->sched, MP3_TIMELEN, ast_read_callback, s);
+	ast_read_callback(s);
+	return 0;
+}
+
+static int mp3_write(struct ast_filestream *fs, struct ast_frame *f)
+{
+	int res;
+	if (fs->fr) {
+		ast_log(LOG_WARNING, "Asked to write on a read stream??\n");
+		return -1;
+	}
+	if (f->frametype != AST_FRAME_VOICE) {
+		ast_log(LOG_WARNING, "Asked to write non-voice frame!\n");
+		return -1;
+	}
+	if (f->subclass != AST_FORMAT_MP3) {
+		ast_log(LOG_WARNING, "Asked to write non-mp3 frame!\n");
+		return -1;
+	}
+	if ((res = write(fs->fd, f->data, f->datalen)) != f->datalen) {
+		ast_log(LOG_WARNING, "Unable to write frame: res=%d (%s)\n", res, strerror(errno));
+		return -1;
+	}	
+	return 0;
+}
+
+char *mp3_getcomment(struct ast_filestream *s)
+{
+	return NULL;
+}
+
+int load_module()
+{
+	return ast_format_register(name, exts, AST_FORMAT_MP3,
+								mp3_open,
+								mp3_rewrite,
+								mp3_apply,
+								mp3_write,
+								mp3_read,
+								mp3_close,
+								mp3_getcomment);
+								
+								
+}
+
+int unload_module()
+{
+	struct ast_filestream *tmp, *tmpl;
+	if (pthread_mutex_lock(&mp3_lock)) {
+		ast_log(LOG_WARNING, "Unable to lock mp3 list\n");
+		return -1;
+	}
+	tmp = glist;
+	while(tmp) {
+		if (tmp->owner)
+			ast_softhangup(tmp->owner);
+		tmpl = tmp;
+		tmp = tmp->next;
+		free(tmpl);
+	}
+	pthread_mutex_unlock(&mp3_lock);
+	return ast_format_unregister(name);
+}	
+
+int usecount()
+{
+	int res;
+	if (pthread_mutex_lock(&mp3_lock)) {
+		ast_log(LOG_WARNING, "Unable to lock mp3 list\n");
+		return -1;
+	}
+	res = glistcnt;
+	pthread_mutex_unlock(&mp3_lock);
+	return res;
+}
+
+char *description()
+{
+	return desc;
+}
+