diff options
Diffstat (limited to 'formats/format_h264.c')
-rw-r--r-- | formats/format_h264.c | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/formats/format_h264.c b/formats/format_h264.c new file mode 100644 index 000000000..e132e0fe0 --- /dev/null +++ b/formats/format_h264.c @@ -0,0 +1,281 @@ +/* + * Asterisk -- An open source telephony toolkit. + * + * Copyright (C) 1999 - 2005, Digium, Inc. + * + * Mark Spencer <markster@digium.com> + * + * See http://www.asterisk.org for more information about + * the Asterisk project. Please do not directly contact + * any of the maintainers of this project for assistance; + * the project provides a web site, mailing lists and IRC + * channels for your use. + * + * This program is free software, distributed under the terms of + * the GNU General Public License Version 2. See the LICENSE file + * at the top of the source tree. + */ + +/*! \file + * + * \brief Save to raw, headerless h264 data. + * \arg File name extension: h264 + * \ingroup formats + */ + +#include <unistd.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <stdlib.h> +#include <sys/time.h> +#include <stdio.h> +#include <errno.h> +#include <string.h> + +#include "asterisk.h" + +ASTERISK_FILE_VERSION(__FILE__, "$Revision: 7221 $") + +#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 "asterisk/endian.h" + +/* Some Ideas for this code came from makeh264e.c by Jeffrey 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 */ + FILE *f; /* 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 h264[4096]; /* Two Real h264 Frames */ +}; + + +AST_MUTEX_DEFINE_STATIC(h264_lock); +static int glistcnt = 0; + +static char *name = "h264"; +static char *desc = "Raw h264 data"; +static char *exts = "h264"; + +static struct ast_filestream *h264_open(FILE *f) +{ + /* 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 = fread(&ts, 1, sizeof(ts), f)) < 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_mutex_lock(&h264_lock)) { + ast_log(LOG_WARNING, "Unable to lock h264 list\n"); + free(tmp); + return NULL; + } + tmp->f = f; + tmp->fr.data = tmp->h264; + tmp->fr.frametype = AST_FRAME_VIDEO; + tmp->fr.subclass = AST_FORMAT_H264; + /* datalen will vary for each frame */ + tmp->fr.src = name; + tmp->fr.mallocd = 0; + glistcnt++; + ast_mutex_unlock(&h264_lock); + ast_update_use_count(); + } + return tmp; +} + +static struct ast_filestream *h264_rewrite(FILE *f, const 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_mutex_lock(&h264_lock)) { + ast_log(LOG_WARNING, "Unable to lock h264 list\n"); + free(tmp); + return NULL; + } + tmp->f = f; + glistcnt++; + ast_mutex_unlock(&h264_lock); + ast_update_use_count(); + } else + ast_log(LOG_WARNING, "Out of memory\n"); + return tmp; +} + +static void h264_close(struct ast_filestream *s) +{ + if (ast_mutex_lock(&h264_lock)) { + ast_log(LOG_WARNING, "Unable to lock h264 list\n"); + return; + } + glistcnt--; + ast_mutex_unlock(&h264_lock); + ast_update_use_count(); + fclose(s->f); + free(s); + s = NULL; +} + +static struct ast_frame *h264_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_H264; + s->fr.offset = AST_FRIENDLY_OFFSET; + s->fr.mallocd = 0; + s->fr.data = s->h264; + if ((res = fread(&len, 1, sizeof(len), s->f)) < 1) { + return NULL; + } + len = ntohs(len); + if (len & 0x8000) { + mark = 1; + } + len &= 0x7fff; + if (len > sizeof(s->h264)) { + ast_log(LOG_WARNING, "Length %d is too long\n", len); + } + if ((res = fread(s->h264, 1, len, s->f)) != 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; + s->fr.delivery.tv_sec = 0; + s->fr.delivery.tv_usec = 0; + if ((res = fread(&ts, 1, sizeof(ts), s->f)) == sizeof(ts)) { + s->lastts = ntohl(ts); + *whennext = s->lastts * 4/45; + } else + *whennext = 0; + return &s->fr; +} + +static int h264_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_H264) { + ast_log(LOG_WARNING, "Asked to write non-h264 frame (%d)!\n", f->subclass); + return -1; + } + ts = htonl(f->samples); + if ((res = fwrite(&ts, 1, sizeof(ts), fs->f)) != sizeof(ts)) { + ast_log(LOG_WARNING, "Bad write (%d/4): %s\n", res, strerror(errno)); + return -1; + } + len = htons(f->datalen | mark); + if ((res = fwrite(&len, 1, sizeof(len), fs->f)) != sizeof(len)) { + ast_log(LOG_WARNING, "Bad write (%d/2): %s\n", res, strerror(errno)); + return -1; + } + if ((res = fwrite(f->data, 1, f->datalen, fs->f)) != f->datalen) { + ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno)); + return -1; + } + return 0; +} + +static char *h264_getcomment(struct ast_filestream *s) +{ + return NULL; +} + +static int h264_seek(struct ast_filestream *fs, long sample_offset, int whence) +{ + /* No way Jose */ + return -1; +} + +static int h264_trunc(struct ast_filestream *fs) +{ + /* Truncate file to current length */ + if (ftruncate(fileno(fs->f), ftell(fs->f)) < 0) + return -1; + return 0; +} + +static long h264_tell(struct ast_filestream *fs) +{ + /* XXX This is totally bogus XXX */ + off_t offset; + offset = ftell(fs->f); + return (offset/20)*160; +} + +int load_module() +{ + return ast_format_register(name, exts, AST_FORMAT_H264, + h264_open, + h264_rewrite, + h264_write, + h264_seek, + h264_trunc, + h264_tell, + h264_read, + h264_close, + h264_getcomment); + + +} + +int unload_module() +{ + return ast_format_unregister(name); +} + +int usecount() +{ + return glistcnt; +} + +char *description() +{ + return desc; +} + + +char *key() +{ + return ASTERISK_GPL_KEY; +} |