2 * Asterisk -- An open source telephony toolkit.
4 * Copyright (C) 1999 - 2005, Digium, Inc.
6 * Mark Spencer <markster@digium.com>
8 * See http://www.asterisk.org for more information about
9 * the Asterisk project. Please do not directly contact
10 * any of the maintainers of this project for assistance;
11 * the project provides a web site, mailing lists and IRC
12 * channels for your use.
14 * This program is free software, distributed under the terms of
15 * the GNU General Public License Version 2. See the LICENSE file
16 * at the top of the source tree.
21 * \brief Save to raw, headerless h264 data.
22 * \arg File name extension: h264
24 * \arg See \ref AstVideo
29 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
32 #include <netinet/in.h>
33 #include <arpa/inet.h>
40 #include "asterisk/lock.h"
41 #include "asterisk/channel.h"
42 #include "asterisk/file.h"
43 #include "asterisk/logger.h"
44 #include "asterisk/sched.h"
45 #include "asterisk/module.h"
46 #include "asterisk/endian.h"
48 /* Some Ideas for this code came from makeh264e.c by Jeffrey Chilton */
50 /* Portions of the conversion code are by guido@sienanet.it */
51 /*! \todo Check this buf size estimate, it may be totally wrong for large frame video */
53 #define BUF_SIZE 4096 /* Two Real h264 Frames */
58 static int h264_open(struct ast_filestream *s)
62 if ((res = fread(&ts, 1, sizeof(ts), s->f)) < sizeof(ts)) {
63 ast_log(LOG_WARNING, "Empty file!\n");
69 static struct ast_frame *h264_read(struct ast_filestream *s, int *whennext)
75 struct h264_desc *fs = (struct h264_desc *)s->private;
77 /* Send a frame from the file to the appropriate channel */
78 if ((res = fread(&len, 1, sizeof(len), s->f)) < 1)
81 mark = (len & 0x8000) ? 1 : 0;
84 ast_log(LOG_WARNING, "Length %d is too long\n", len);
85 len = BUF_SIZE; /* XXX truncate */
87 s->fr.frametype = AST_FRAME_VIDEO;
88 s->fr.subclass = AST_FORMAT_H264;
90 AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, len);
91 if ((res = fread(s->fr.data, 1, s->fr.datalen, s->f)) != s->fr.datalen) {
93 ast_log(LOG_WARNING, "Short read (%d of %d) (%s)!\n", res, len, strerror(errno));
96 s->fr.samples = fs->lastts;
98 s->fr.subclass |= mark;
99 s->fr.delivery.tv_sec = 0;
100 s->fr.delivery.tv_usec = 0;
101 if ((res = fread(&ts, 1, sizeof(ts), s->f)) == sizeof(ts)) {
102 fs->lastts = ntohl(ts);
103 *whennext = fs->lastts * 4/45;
109 static int h264_write(struct ast_filestream *s, struct ast_frame *f)
116 if (f->frametype != AST_FRAME_VIDEO) {
117 ast_log(LOG_WARNING, "Asked to write non-video frame!\n");
120 mark = (f->subclass & 0x1) ? 0x8000 : 0;
121 if ((f->subclass & ~0x1) != AST_FORMAT_H264) {
122 ast_log(LOG_WARNING, "Asked to write non-h264 frame (%d)!\n", f->subclass);
125 ts = htonl(f->samples);
126 if ((res = fwrite(&ts, 1, sizeof(ts), s->f)) != sizeof(ts)) {
127 ast_log(LOG_WARNING, "Bad write (%d/4): %s\n", res, strerror(errno));
130 len = htons(f->datalen | mark);
131 if ((res = fwrite(&len, 1, sizeof(len), s->f)) != sizeof(len)) {
132 ast_log(LOG_WARNING, "Bad write (%d/2): %s\n", res, strerror(errno));
135 if ((res = fwrite(f->data, 1, f->datalen, s->f)) != f->datalen) {
136 ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno));
142 static int h264_seek(struct ast_filestream *fs, off_t sample_offset, int whence)
148 static int h264_trunc(struct ast_filestream *fs)
150 /* Truncate file to current length */
151 if (ftruncate(fileno(fs->f), ftell(fs->f)) < 0)
156 static off_t h264_tell(struct ast_filestream *fs)
158 off_t offset = ftell(fs->f);
159 return offset; /* XXX totally bogus, needs fixing */
162 static const struct ast_format h264_f = {
165 .format = AST_FORMAT_H264,
172 .buf_size = BUF_SIZE + AST_FRIENDLY_OFFSET,
173 .desc_size = sizeof(struct h264_desc),
176 static int load_module(void)
178 return ast_format_register(&h264_f);
181 static int unload_module(void)
183 return ast_format_unregister(h264_f.name);
186 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Raw H.264 data");