diff options
Diffstat (limited to '1.2-netsec/formats/format_pcm.c')
-rw-r--r-- | 1.2-netsec/formats/format_pcm.c | 276 |
1 files changed, 0 insertions, 276 deletions
diff --git a/1.2-netsec/formats/format_pcm.c b/1.2-netsec/formats/format_pcm.c deleted file mode 100644 index 289038ced..000000000 --- a/1.2-netsec/formats/format_pcm.c +++ /dev/null @@ -1,276 +0,0 @@ -/* - * Asterisk -- An open source telephony toolkit. - * - * Copyright (C) 1999 - 2006, 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 Flat, binary, ulaw PCM file format. - * \arg File name extension: pcm, ulaw, ul, mu - * - * \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__, "$Revision$") - -#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" -#include "asterisk/ulaw.h" - -#define BUF_SIZE 160 /* 160 samples */ - -struct ast_filestream { - void *reserved[AST_RESERVED_POINTERS]; - /* This is what a filestream means to us */ - FILE *f; /* Descriptor */ - struct ast_channel *owner; - struct ast_frame fr; /* Frame information */ - char waste[AST_FRIENDLY_OFFSET]; /* Buffer for sending frames, etc */ - char empty; /* Empty character */ - unsigned char buf[BUF_SIZE]; /* Output Buffer */ - struct timeval last; -}; - - -AST_MUTEX_DEFINE_STATIC(pcm_lock); -static int glistcnt = 0; - -static char *name = "pcm"; -static char *desc = "Raw uLaw 8khz Audio support (PCM)"; -static char *exts = "pcm|ulaw|ul|mu"; - -static char ulaw_silence[BUF_SIZE]; - -static struct ast_filestream *pcm_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; - if ((tmp = malloc(sizeof(struct ast_filestream)))) { - memset(tmp, 0, sizeof(struct ast_filestream)); - if (ast_mutex_lock(&pcm_lock)) { - ast_log(LOG_WARNING, "Unable to lock pcm list\n"); - free(tmp); - return NULL; - } - tmp->f = f; - tmp->fr.data = tmp->buf; - tmp->fr.frametype = AST_FRAME_VOICE; - tmp->fr.subclass = AST_FORMAT_ULAW; - /* datalen will vary for each frame */ - tmp->fr.src = name; - tmp->fr.mallocd = 0; - glistcnt++; - ast_mutex_unlock(&pcm_lock); - ast_update_use_count(); - } - return tmp; -} - -static struct ast_filestream *pcm_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(&pcm_lock)) { - ast_log(LOG_WARNING, "Unable to lock pcm list\n"); - free(tmp); - return NULL; - } - tmp->f = f; - glistcnt++; - ast_mutex_unlock(&pcm_lock); - ast_update_use_count(); - } else - ast_log(LOG_WARNING, "Out of memory\n"); - return tmp; -} - -static void pcm_close(struct ast_filestream *s) -{ - if (ast_mutex_lock(&pcm_lock)) { - ast_log(LOG_WARNING, "Unable to lock pcm list\n"); - return; - } - glistcnt--; - ast_mutex_unlock(&pcm_lock); - ast_update_use_count(); - fclose(s->f); - free(s); - s = NULL; -} - -static struct ast_frame *pcm_read(struct ast_filestream *s, int *whennext) -{ - int res; - int delay; - /* Send a frame from the file to the appropriate channel */ - - s->fr.frametype = AST_FRAME_VOICE; - s->fr.subclass = AST_FORMAT_ULAW; - s->fr.offset = AST_FRIENDLY_OFFSET; - s->fr.mallocd = 0; - s->fr.data = s->buf; - if ((res = fread(s->buf, 1, BUF_SIZE, s->f)) < 1) { - if (res) - ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno)); - return NULL; - } - s->fr.samples = res; - s->fr.datalen = res; - delay = s->fr.samples; - *whennext = delay; - return &s->fr; -} - -static int pcm_write(struct ast_filestream *fs, struct ast_frame *f) -{ - int res; - if (f->frametype != AST_FRAME_VOICE) { - ast_log(LOG_WARNING, "Asked to write non-voice frame!\n"); - return -1; - } - if (f->subclass != AST_FORMAT_ULAW) { - ast_log(LOG_WARNING, "Asked to write non-ulaw frame (%d)!\n", f->subclass); - 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 int pcm_seek(struct ast_filestream *fs, long sample_offset, int whence) -{ - long cur, max, offset = 0; - - cur = ftell(fs->f); - fseek(fs->f, 0, SEEK_END); - max = ftell(fs->f); - - switch (whence) { - case SEEK_SET: - offset = sample_offset; - break; - case SEEK_END: - offset = max - sample_offset; - break; - case SEEK_CUR: - case SEEK_FORCECUR: - offset = cur + sample_offset; - break; - } - - switch (whence) { - case SEEK_FORCECUR: - if (offset > max) { - size_t left = offset - max; - size_t res; - - while (left) { - res = fwrite(ulaw_silence, sizeof(ulaw_silence[0]), - (left > BUF_SIZE) ? BUF_SIZE : left, fs->f); - if (res == -1) - return res; - left -= res * sizeof(ulaw_silence[0]); - } - return offset; - } - /* fall through */ - default: - offset = (offset > max) ? max : offset; - offset = (offset < 0) ? 0 : offset; - return fseek(fs->f, offset, SEEK_SET); - } -} - -static int pcm_trunc(struct ast_filestream *fs) -{ - return ftruncate(fileno(fs->f), ftell(fs->f)); -} - -static long pcm_tell(struct ast_filestream *fs) -{ - off_t offset; - offset = ftell(fs->f); - return offset; -} - -static char *pcm_getcomment(struct ast_filestream *s) -{ - return NULL; -} - -int load_module() -{ - int index; - - for (index = 0; index < (sizeof(ulaw_silence) / sizeof(ulaw_silence[0])); index++) - ulaw_silence[index] = AST_LIN2MU(0); - - return ast_format_register(name, exts, AST_FORMAT_ULAW, - pcm_open, - pcm_rewrite, - pcm_write, - pcm_seek, - pcm_trunc, - pcm_tell, - pcm_read, - pcm_close, - pcm_getcomment); -} - -int unload_module() -{ - return ast_format_unregister(name); -} - -int usecount() -{ - return glistcnt; -} - -char *description() -{ - return desc; -} - - -char *key() -{ - return ASTERISK_GPL_KEY; -} |