Add H.263 video support

git-svn-id: http://svn.digium.com/svn/asterisk/trunk@1131 f38db490-d61c-443f-a65b-d21fe96a405b

2 files changed, 272 insertions, 1 deletions

diff --git a/formats/Makefile b/formats/Makefile
index 540785b2d..37242bc0d 100755
--- a/formats/Makefile
+++ b/formats/Makefile
@@ -13,7 +13,7 @@
 
 FORMAT_LIBS=format_gsm.so format_wav.so format_mp3.so \
 	format_wav_gsm.so format_vox.so format_pcm.so format_g729.so \
-	format_pcm_alaw.so
+	format_pcm_alaw.so format_h263.so
 FORMAT_LIBS+=format_jpeg.so
 #
 # G723 simple frame is depricated
diff --git a/formats/format_h263.c b/formats/format_h263.c
new file mode 100755
index 000000000..19a57ed5a
--- /dev/null
+++ b/formats/format_h263.c
@@ -0,0 +1,271 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Save to raw, headerless h263 data.
+ * 
+ * Copyright (C) 1999, Mark Spencer
+ *
+ * Mark Spencer <markster@linux-support.net>
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ */
+ 
+#include <asterisk/lock.h>
+#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 <sys/time.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <pthread.h>
+#ifdef __linux__
+#include <endian.h>
+#else
+#include <machine/endian.h>
+#endif
+
+/* Some Ideas for this code came from makeh263e.c by Jeffery Chilton */
+
+/* Portions of the conversion code are by guido@sienanet.it */
+
+struct ast_filestream {
+	void *reserved[AST_RESERVED_POINTERS];
+	/* Believe it or not, we must decode/recode to account for the
+	   weird MS format */
+	/* This is what a filestream means to us */
+	int fd; /* Descriptor */
+	unsigned int lastts;
+	struct ast_frame fr;				/* Frame information */
+	char waste[AST_FRIENDLY_OFFSET];	/* Buffer for sending frames, etc */
+	char empty;							/* Empty character */
+	unsigned char h263[4096];				/* Two Real h263 Frames */
+};
+
+
+static pthread_mutex_t h263_lock = AST_MUTEX_INITIALIZER;
+static int glistcnt = 0;
+
+static char *name = "h263";
+static char *desc = "Raw h263 data";
+static char *exts = "h263";
+
+static struct ast_filestream *h263_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;
+	unsigned int ts;
+	int res;
+	if ((res = read(fd, &ts, sizeof(ts))) < sizeof(ts)) {
+		ast_log(LOG_WARNING, "Empty file!\n");
+		return NULL;
+	}
+		
+	if ((tmp = malloc(sizeof(struct ast_filestream)))) {
+		memset(tmp, 0, sizeof(struct ast_filestream));
+		if (ast_pthread_mutex_lock(&h263_lock)) {
+			ast_log(LOG_WARNING, "Unable to lock h263 list\n");
+			free(tmp);
+			return NULL;
+		}
+		tmp->fd = fd;
+		tmp->fr.data = tmp->h263;
+		tmp->fr.frametype = AST_FRAME_VIDEO;
+		tmp->fr.subclass = AST_FORMAT_H263;
+		/* datalen will vary for each frame */
+		tmp->fr.src = name;
+		tmp->fr.mallocd = 0;
+		glistcnt++;
+		ast_pthread_mutex_unlock(&h263_lock);
+		ast_update_use_count();
+	}
+	return tmp;
+}
+
+static struct ast_filestream *h263_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)))) {
+		memset(tmp, 0, sizeof(struct ast_filestream));
+		if (ast_pthread_mutex_lock(&h263_lock)) {
+			ast_log(LOG_WARNING, "Unable to lock h263 list\n");
+			free(tmp);
+			return NULL;
+		}
+		tmp->fd = fd;
+		glistcnt++;
+		ast_pthread_mutex_unlock(&h263_lock);
+		ast_update_use_count();
+	} else
+		ast_log(LOG_WARNING, "Out of memory\n");
+	return tmp;
+}
+
+static void h263_close(struct ast_filestream *s)
+{
+	if (ast_pthread_mutex_lock(&h263_lock)) {
+		ast_log(LOG_WARNING, "Unable to lock h263 list\n");
+		return;
+	}
+	glistcnt--;
+	ast_pthread_mutex_unlock(&h263_lock);
+	ast_update_use_count();
+	close(s->fd);
+	free(s);
+	s = NULL;
+}
+
+static struct ast_frame *h263_read(struct ast_filestream *s, int *whennext)
+{
+	int res;
+	int mark=0;
+	unsigned short len;
+	unsigned int ts;
+	/* Send a frame from the file to the appropriate channel */
+	s->fr.frametype = AST_FRAME_VIDEO;
+	s->fr.subclass = AST_FORMAT_H263;
+	s->fr.offset = AST_FRIENDLY_OFFSET;
+	s->fr.mallocd = 0;
+	s->fr.data = s->h263;
+	if ((res = read(s->fd, &len, sizeof(len))) < 1) {
+		return NULL;
+	}
+	len = ntohs(len);
+	if (len & 0x8000) {
+		mark = 1;
+	}
+	len &= 0x7fff;
+	if (len > sizeof(s->h263)) {
+		ast_log(LOG_WARNING, "Length %d is too long\n", len);
+	}
+	if ((res = read(s->fd, s->h263, len)) != len) {
+		if (res)
+			ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
+		return NULL;
+	}
+	s->fr.samples = s->lastts;
+	s->fr.datalen = len;
+	s->fr.subclass |= mark;
+	if ((res = read(s->fd, &ts, sizeof(ts))) == sizeof(ts)) {
+		s->lastts = *whennext = ntohl(ts) * 4/45;
+	} else
+		*whennext = 0;
+	return &s->fr;
+}
+
+static int h263_write(struct ast_filestream *fs, struct ast_frame *f)
+{
+	int res;
+	unsigned int ts;
+	unsigned short len;
+	int subclass;
+	int mark=0;
+	if (f->frametype != AST_FRAME_VIDEO) {
+		ast_log(LOG_WARNING, "Asked to write non-video frame!\n");
+		return -1;
+	}
+	subclass = f->subclass;
+	if (subclass & 0x1)
+		mark=0x8000;
+	subclass &= ~0x1;
+	if (subclass != AST_FORMAT_H263) {
+		ast_log(LOG_WARNING, "Asked to write non-h263 frame (%d)!\n", f->subclass);
+		return -1;
+	}
+	ts = htonl(f->samples);
+	if ((res = write(fs->fd, &ts, sizeof(ts))) != sizeof(ts)) {
+			ast_log(LOG_WARNING, "Bad write (%d/4): %s\n", res, strerror(errno));
+			return -1;
+	}
+	len = htons(f->datalen | mark);
+	if ((res = write(fs->fd, &len, sizeof(len))) != sizeof(len)) {
+			ast_log(LOG_WARNING, "Bad write (%d/2): %s\n", res, strerror(errno));
+			return -1;
+	}
+	if ((res = write(fs->fd, f->data, f->datalen)) != f->datalen) {
+			ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno));
+			return -1;
+	}
+	return 0;
+}
+
+static char *h263_getcomment(struct ast_filestream *s)
+{
+	return NULL;
+}
+
+static int h263_seek(struct ast_filestream *fs, long sample_offset, int whence)
+{
+	/* No way Jose */
+	return -1;
+}
+
+static int h263_trunc(struct ast_filestream *fs)
+{
+	/* Truncate file to current length */
+	if (ftruncate(fs->fd, lseek(fs->fd, 0, SEEK_CUR)) < 0)
+		return -1;
+	return 0;
+}
+
+static long h263_tell(struct ast_filestream *fs)
+{
+	off_t offset;
+	offset = lseek(fs->fd, 0, SEEK_CUR);
+	return (offset/20)*160;
+}
+
+int load_module()
+{
+	return ast_format_register(name, exts, AST_FORMAT_H263,
+								h263_open,
+								h263_rewrite,
+								h263_write,
+								h263_seek,
+								h263_trunc,
+								h263_tell,
+								h263_read,
+								h263_close,
+								h263_getcomment);
+								
+								
+}
+
+int unload_module()
+{
+	return ast_format_unregister(name);
+}	
+
+int usecount()
+{
+	int res;
+	if (ast_pthread_mutex_lock(&h263_lock)) {
+		ast_log(LOG_WARNING, "Unable to lock h263 list\n");
+		return -1;
+	}
+	res = glistcnt;
+	ast_pthread_mutex_unlock(&h263_lock);
+	return res;
+}
+
+char *description()
+{
+	return desc;
+}
+
+
+char *key()
+{
+	return ASTERISK_GPL_KEY;
+}