diff options
author | markster <markster@f38db490-d61c-443f-a65b-d21fe96a405b> | 2003-06-29 03:24:39 +0000 |
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committer | markster <markster@f38db490-d61c-443f-a65b-d21fe96a405b> | 2003-06-29 03:24:39 +0000 |
commit | 6a9e0210bb8f5390e96e3c6746ff907e9858729f (patch) | |
tree | 4eff0e924a946900561c70a2d56554a97b06efb4 /formats | |
parent | 3a0233e8edb056a24609732411d306608ffccece (diff) |
Add H.263 video support
git-svn-id: http://svn.digium.com/svn/asterisk/trunk@1131 f38db490-d61c-443f-a65b-d21fe96a405b
Diffstat (limited to 'formats')
-rwxr-xr-x | formats/Makefile | 2 | ||||
-rwxr-xr-x | formats/format_h263.c | 271 |
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; +} |