/* * CallWeaver -- An open source telephony toolkit. * * Copyright (c) 2004 - 2005, inAccess Networks * * Michael Manousos * * See http://www.callweaver.org for more information about * the CallWeaver 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 Headerless G.726 (16/24/32/40kbps) data format for CallWeaver. * * File name extensions: * \arg 40 kbps: g726-40 * \arg 32 kbps: g726-32 * \arg 24 kbps: g726-24 * \arg 16 kbps: g726-16 * \ingroup formats */ #ifdef HAVE_CONFIG_H #include "confdefs.h" #endif #include #include #include #include #include #include #include #include #include "callweaver.h" CALLWEAVER_FILE_VERSION("$HeadURL$", "$Revision$") #include "callweaver/lock.h" #include "callweaver/options.h" #include "callweaver/channel.h" #include "callweaver/file.h" #include "callweaver/logger.h" #include "callweaver/sched.h" #include "callweaver/module.h" #define RATE_40 0 #define RATE_32 1 #define RATE_24 2 #define RATE_16 3 /* We can only read/write chunks of FRAME_TIME ms G.726 data */ #define FRAME_TIME 10 /* 10 ms size */ /* Frame sizes in bytes */ static int frame_size[4] = { FRAME_TIME * 5, FRAME_TIME * 4, FRAME_TIME * 3, FRAME_TIME * 2 }; struct cw_filestream { /* Do not place anything before "reserved" */ void *reserved[CW_RESERVED_POINTERS]; /* This is what a filestream means to us */ FILE *f; /* Open file descriptor */ int rate; /* RATE_* defines */ struct cw_frame fr; /* Frame information */ char waste[CW_FRIENDLY_OFFSET]; /* Buffer for sending frames, etc */ char empty; /* Empty character */ unsigned char g726[FRAME_TIME * 5]; /* G.726 encoded voice */ }; CW_MUTEX_DEFINE_STATIC(g726_lock); static int glistcnt = 0; static char *desc = "Raw G.726 (16/24/32/40kbps) data"; static char *name40 = "g726-40"; static char *name32 = "g726-32"; static char *name24 = "g726-24"; static char *name16 = "g726-16"; static char *exts40 = "g726-40"; static char *exts32 = "g726-32"; static char *exts24 = "g726-24"; static char *exts16 = "g726-16"; /* * Rate dependant format functions (open, rewrite) */ static struct cw_filestream *g726_40_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 cw_filestream *tmp; if ((tmp = malloc(sizeof(struct cw_filestream)))) { memset(tmp, 0, sizeof(struct cw_filestream)); if (cw_mutex_lock(&g726_lock)) { cw_log(LOG_WARNING, "Unable to lock g726 list.\n"); free(tmp); return NULL; } tmp->f = f; tmp->rate = RATE_40; cw_fr_init_ex(&tmp->fr, CW_FRAME_VOICE, CW_FORMAT_G726, name40); tmp->fr.data = tmp->g726; /* datalen will vary for each frame */ glistcnt++; if (option_debug) cw_log(LOG_DEBUG, "Created filestream G.726-%dk.\n", 40 - tmp->rate * 8); cw_mutex_unlock(&g726_lock); cw_update_use_count(); } return tmp; } static struct cw_filestream *g726_32_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 cw_filestream *tmp; if ((tmp = malloc(sizeof(struct cw_filestream)))) { memset(tmp, 0, sizeof(struct cw_filestream)); if (cw_mutex_lock(&g726_lock)) { cw_log(LOG_WARNING, "Unable to lock g726 list.\n"); free(tmp); return NULL; } tmp->f = f; tmp->rate = RATE_32; cw_fr_init_ex(&tmp->fr, CW_FRAME_VOICE, CW_FORMAT_G726, name32); tmp->fr.data = tmp->g726; /* datalen will vary for each frame */ glistcnt++; if (option_debug) cw_log(LOG_DEBUG, "Created filestream G.726-%dk.\n", 40 - tmp->rate * 8); cw_mutex_unlock(&g726_lock); cw_update_use_count(); } return tmp; } static struct cw_filestream *g726_24_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 cw_filestream *tmp; if ((tmp = malloc(sizeof(struct cw_filestream)))) { memset(tmp, 0, sizeof(struct cw_filestream)); if (cw_mutex_lock(&g726_lock)) { cw_log(LOG_WARNING, "Unable to lock g726 list.\n"); free(tmp); return NULL; } tmp->f = f; tmp->rate = RATE_24; cw_fr_init_ex(&tmp->fr, CW_FRAME_VOICE, CW_FORMAT_G726, name24); tmp->fr.data = tmp->g726; /* datalen will vary for each frame */ glistcnt++; if (option_debug) cw_log(LOG_DEBUG, "Created filestream G.726-%dk.\n", 40 - tmp->rate * 8); cw_mutex_unlock(&g726_lock); cw_update_use_count(); } return tmp; } static struct cw_filestream *g726_16_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 cw_filestream *tmp; if ((tmp = malloc(sizeof(struct cw_filestream)))) { memset(tmp, 0, sizeof(struct cw_filestream)); if (cw_mutex_lock(&g726_lock)) { cw_log(LOG_WARNING, "Unable to lock g726 list.\n"); free(tmp); return NULL; } tmp->f = f; cw_fr_init_ex(&tmp->fr, CW_FRAME_VOICE, CW_FORMAT_G726, name16); tmp->rate = RATE_16; tmp->fr.data = tmp->g726; /* datalen will vary for each frame */ glistcnt++; if (option_debug) cw_log(LOG_DEBUG, "Created filestream G.726-%dk.\n", 40 - tmp->rate * 8); cw_mutex_unlock(&g726_lock); cw_update_use_count(); } return tmp; } static struct cw_filestream *g726_40_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 cw_filestream *tmp; if ((tmp = malloc(sizeof(struct cw_filestream)))) { memset(tmp, 0, sizeof(struct cw_filestream)); if (cw_mutex_lock(&g726_lock)) { cw_log(LOG_WARNING, "Unable to lock g726 list.\n"); free(tmp); return NULL; } tmp->f = f; tmp->rate = RATE_40; glistcnt++; if (option_debug) cw_log(LOG_DEBUG, "Created filestream G.726-%dk.\n", 40 - tmp->rate * 8); cw_mutex_unlock(&g726_lock); cw_update_use_count(); } else cw_log(LOG_WARNING, "Out of memory\n"); return tmp; } static struct cw_filestream *g726_32_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 cw_filestream *tmp; if ((tmp = malloc(sizeof(struct cw_filestream)))) { memset(tmp, 0, sizeof(struct cw_filestream)); if (cw_mutex_lock(&g726_lock)) { cw_log(LOG_WARNING, "Unable to lock g726 list.\n"); free(tmp); return NULL; } tmp->f = f; tmp->rate = RATE_32; glistcnt++; if (option_debug) cw_log(LOG_DEBUG, "Created filestream G.726-%dk.\n", 40 - tmp->rate * 8); cw_mutex_unlock(&g726_lock); cw_update_use_count(); } else cw_log(LOG_WARNING, "Out of memory\n"); return tmp; } static struct cw_filestream *g726_24_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 cw_filestream *tmp; if ((tmp = malloc(sizeof(struct cw_filestream)))) { memset(tmp, 0, sizeof(struct cw_filestream)); if (cw_mutex_lock(&g726_lock)) { cw_log(LOG_WARNING, "Unable to lock g726 list.\n"); free(tmp); return NULL; } tmp->f = f; tmp->rate = RATE_24; glistcnt++; if (option_debug) cw_log(LOG_DEBUG, "Created filestream G.726-%dk.\n", 40 - tmp->rate * 8); cw_mutex_unlock(&g726_lock); cw_update_use_count(); } else cw_log(LOG_WARNING, "Out of memory\n"); return tmp; } static struct cw_filestream *g726_16_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 cw_filestream *tmp; if ((tmp = malloc(sizeof(struct cw_filestream)))) { memset(tmp, 0, sizeof(struct cw_filestream)); if (cw_mutex_lock(&g726_lock)) { cw_log(LOG_WARNING, "Unable to lock g726 list.\n"); free(tmp); return NULL; } tmp->f = f; tmp->rate = RATE_16; glistcnt++; if (option_debug) cw_log(LOG_DEBUG, "Created filestream G.726-%dk.\n", 40 - tmp->rate * 8); cw_mutex_unlock(&g726_lock); cw_update_use_count(); } else cw_log(LOG_WARNING, "Out of memory\n"); return tmp; } /* * Rate independent format functions (close, read, write) */ static void g726_close(struct cw_filestream *s) { if (cw_mutex_lock(&g726_lock)) { cw_log(LOG_WARNING, "Unable to lock g726 list.\n"); return; } glistcnt--; if (option_debug) cw_log(LOG_DEBUG, "Closed filestream G.726-%dk.\n", 40 - s->rate * 8); cw_mutex_unlock(&g726_lock); cw_update_use_count(); fclose(s->f); free(s); s = NULL; } static struct cw_frame *g726_read(struct cw_filestream *s, int *whennext) { int res; /* Send a frame from the file to the appropriate channel */ cw_fr_init_ex(&s->fr, CW_FRAME_VOICE, CW_FORMAT_G726, NULL); s->fr.offset = CW_FRIENDLY_OFFSET; s->fr.samples = 8*FRAME_TIME; s->fr.datalen = frame_size[s->rate]; s->fr.data = s->g726; if ((res = fread(s->g726, 1, s->fr.datalen, s->f)) != s->fr.datalen) { if (res) cw_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno)); return NULL; } *whennext = s->fr.samples; return &s->fr; } static int g726_write(struct cw_filestream *fs, struct cw_frame *f) { int res; if (f->frametype != CW_FRAME_VOICE) { cw_log(LOG_WARNING, "Asked to write non-voice frame!\n"); return -1; } if (f->subclass != CW_FORMAT_G726) { cw_log(LOG_WARNING, "Asked to write non-G726 frame (%d)!\n", f->subclass); return -1; } if (f->datalen % frame_size[fs->rate]) { cw_log(LOG_WARNING, "Invalid data length %d, should be multiple of %d\n", f->datalen, frame_size[fs->rate]); return -1; } if ((res = fwrite(f->data, 1, f->datalen, fs->f)) != f->datalen) { cw_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, frame_size[fs->rate], strerror(errno)); return -1; } return 0; } static char *g726_getcomment(struct cw_filestream *s) { return NULL; } static int g726_seek(struct cw_filestream *fs, long sample_offset, int whence) { return -1; } static int g726_trunc(struct cw_filestream *fs) { return -1; } static long g726_tell(struct cw_filestream *fs) { return -1; } /* * Module interface (load_module, unload_module, usecount, description, key) */ int load_module(void) { int res; res = cw_format_register(name40, exts40, CW_FORMAT_G726, g726_40_open, g726_40_rewrite, g726_write, g726_seek, g726_trunc, g726_tell, g726_read, g726_close, g726_getcomment); if (res) { cw_log(LOG_WARNING, "Failed to register format %s.\n", name40); return(-1); } res = cw_format_register(name32, exts32, CW_FORMAT_G726, g726_32_open, g726_32_rewrite, g726_write, g726_seek, g726_trunc, g726_tell, g726_read, g726_close, g726_getcomment); if (res) { cw_log(LOG_WARNING, "Failed to register format %s.\n", name32); return(-1); } res = cw_format_register(name24, exts24, CW_FORMAT_G726, g726_24_open, g726_24_rewrite, g726_write, g726_seek, g726_trunc, g726_tell, g726_read, g726_close, g726_getcomment); if (res) { cw_log(LOG_WARNING, "Failed to register format %s.\n", name24); return(-1); } res = cw_format_register(name16, exts16, CW_FORMAT_G726, g726_16_open, g726_16_rewrite, g726_write, g726_seek, g726_trunc, g726_tell, g726_read, g726_close, g726_getcomment); if (res) { cw_log(LOG_WARNING, "Failed to register format %s.\n", name16); return(-1); } return(0); } int unload_module(void) { int res; res = cw_format_unregister(name16); if (res) { cw_log(LOG_WARNING, "Failed to unregister format %s.\n", name16); return(-1); } res = cw_format_unregister(name24); if (res) { cw_log(LOG_WARNING, "Failed to unregister format %s.\n", name24); return(-1); } res = cw_format_unregister(name32); if (res) { cw_log(LOG_WARNING, "Failed to unregister format %s.\n", name32); return(-1); } res = cw_format_unregister(name40); if (res) { cw_log(LOG_WARNING, "Failed to unregister format %s.\n", name40); return(-1); } return(0); } int usecount(void) { return glistcnt; } char *description(void) { return desc; }