Headerless G.726 (16/24/32/40kbps) data format for Asterisk. More...

#include "asterisk.h"
#include "asterisk/mod_format.h"
#include "asterisk/module.h"
#include "asterisk/endian.h"

Include dependency graph for format_g726.c:

Go to the source code of this file.

Data Structures
struct	g726_desc
Defines
#define	BUF_SIZE (5*FRAME_TIME)
#define	FRAME_TIME 10
#define	RATE_16 3
#define	RATE_24 2
#define	RATE_32 1
#define	RATE_40 0
Functions
static void	__reg_module (void)
static void	__unreg_module (void)
static int	g726_16_open (struct ast_filestream *s)
static int	g726_16_rewrite (struct ast_filestream s, const char comment)
static int	g726_24_open (struct ast_filestream *s)
static int	g726_24_rewrite (struct ast_filestream s, const char comment)
static int	g726_32_open (struct ast_filestream *s)
static int	g726_32_rewrite (struct ast_filestream s, const char comment)
static int	g726_40_open (struct ast_filestream *s)
static int	g726_40_rewrite (struct ast_filestream s, const char comment)
static int	g726_open (struct ast_filestream *tmp, int rate)
static struct ast_frame *	g726_read (struct ast_filestream s, int whennext)
static int	g726_seek (struct ast_filestream *fs, off_t sample_offset, int whence)
static off_t	g726_tell (struct ast_filestream *fs)
static int	g726_trunc (struct ast_filestream *fs)
static int	g726_write (struct ast_filestream s, struct ast_frame f)
static int	load_module (void)
static int	unload_module (void)
Variables
static struct ast_module_info	__mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Raw G.726 (16/24/32/40kbps) data" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .load_pri = 10, }
static struct ast_module_info *	ast_module_info = &__mod_info
static struct ast_format	f []
static int	frame_size [4]

Detailed Description

Headerless G.726 (16/24/32/40kbps) data format for Asterisk.

File name extensions:

40 kbps: g726-40
32 kbps: g726-32
24 kbps: g726-24
16 kbps: g726-16

Definition in file format_g726.c.

Define Documentation

#define BUF_SIZE (5*FRAME_TIME)

Definition at line 47 of file format_g726.c.

#define FRAME_TIME 10

Definition at line 45 of file format_g726.c.

Referenced by g726_read().

#define RATE_16 3

Definition at line 42 of file format_g726.c.

Referenced by g726_16_open(), and g726_16_rewrite().

#define RATE_24 2

Definition at line 41 of file format_g726.c.

Referenced by g726_24_open(), and g726_24_rewrite().

#define RATE_32 1

Definition at line 40 of file format_g726.c.

Referenced by g726_32_open(), and g726_32_rewrite().

#define RATE_40 0

Definition at line 39 of file format_g726.c.

Referenced by g726_40_open(), and g726_40_rewrite().

Function Documentation

static void __reg_module ( void ) [static]

Definition at line 265 of file format_g726.c.

static void __unreg_module ( void ) [static]

Definition at line 265 of file format_g726.c.

static int g726_16_open ( struct ast_filestream * s ) [static]

Definition at line 86 of file format_g726.c.

References g726_open(), and RATE_16.

{
   return g726_open(s, RATE_16);
}

static int g726_16_rewrite	(	struct ast_filestream *	s,
		const char *	comment
	)		`[static]`

Definition at line 106 of file format_g726.c.

References g726_open(), and RATE_16.

{
   return g726_open(s, RATE_16);
}

static int g726_24_open ( struct ast_filestream * s ) [static]

Definition at line 81 of file format_g726.c.

References g726_open(), and RATE_24.

{
   return g726_open(s, RATE_24);
}

static int g726_24_rewrite	(	struct ast_filestream *	s,
		const char *	comment
	)		`[static]`

Definition at line 101 of file format_g726.c.

References g726_open(), and RATE_24.

{
   return g726_open(s, RATE_24);
}

static int g726_32_open ( struct ast_filestream * s ) [static]

Definition at line 76 of file format_g726.c.

References g726_open(), and RATE_32.

{
   return g726_open(s, RATE_32);
}

static int g726_32_rewrite	(	struct ast_filestream *	s,
		const char *	comment
	)		`[static]`

Definition at line 96 of file format_g726.c.

References g726_open(), and RATE_32.

{
   return g726_open(s, RATE_32);
}

static int g726_40_open ( struct ast_filestream * s ) [static]

Definition at line 71 of file format_g726.c.

References g726_open(), and RATE_40.

{
   return g726_open(s, RATE_40);
}

static int g726_40_rewrite	(	struct ast_filestream *	s,
		const char *	comment
	)		`[static]`

Definition at line 91 of file format_g726.c.

References g726_open(), and RATE_40.

{
   return g726_open(s, RATE_40);
}

static int g726_open	(	struct ast_filestream *	tmp,
		int	rate
	)		`[static]`

Definition at line 63 of file format_g726.c.

References ast_filestream::_private, ast_debug, g726_desc::rate, and s.

Referenced by g726_16_open(), g726_16_rewrite(), g726_24_open(), g726_24_rewrite(), g726_32_open(), g726_32_rewrite(), g726_40_open(), and g726_40_rewrite().

{
   struct g726_desc *s = (struct g726_desc *)tmp->_private;
   s->rate = rate;
   ast_debug(1, "Created filestream G.726-%dk.\n", 40 - s->rate * 8);
   return 0;
}

static struct ast_frame* g726_read	(	struct ast_filestream *	s,
		int *	whennext
	)		`[static, read]`

Definition at line 115 of file format_g726.c.

References ast_filestream::_private, AST_FORMAT_G726, AST_FRAME_SET_BUFFER, AST_FRAME_VOICE, AST_FRIENDLY_OFFSET, ast_log(), ast_filestream::buf, ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_filestream::fr, FRAME_TIME, ast_frame::frametype, LOG_WARNING, ast_frame::mallocd, ast_frame::ptr, g726_desc::rate, ast_frame::samples, and ast_frame::subclass.

{
   int res;
   struct g726_desc *fs = (struct g726_desc *)s->_private;

   /* Send a frame from the file to the appropriate channel */
   s->fr.frametype = AST_FRAME_VOICE;
   s->fr.subclass = AST_FORMAT_G726;
   s->fr.mallocd = 0;
   AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, frame_size[fs->rate]);
   s->fr.samples = 8 * FRAME_TIME;
   if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) != s->fr.datalen) {
      if (res)
         ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
      return NULL;
   }
   *whennext = s->fr.samples;
   return &s->fr;
}

static int g726_seek	(	struct ast_filestream *	fs,
		off_t	sample_offset,
		int	whence
	)		`[static]`

Definition at line 162 of file format_g726.c.

{
   return -1;
}

static off_t g726_tell ( struct ast_filestream * fs ) [static]

Definition at line 172 of file format_g726.c.

{
   return -1;
}

static int g726_trunc ( struct ast_filestream * fs ) [static]

Definition at line 167 of file format_g726.c.

{
   return -1;
}

static int g726_write	(	struct ast_filestream *	s,
		struct ast_frame *	f
	)		`[static]`

Definition at line 135 of file format_g726.c.

References ast_filestream::_private, AST_FORMAT_G726, AST_FRAME_VOICE, ast_log(), ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_frame::frametype, LOG_WARNING, ast_frame::ptr, g726_desc::rate, and ast_frame::subclass.

{
   int res;
   struct g726_desc *fs = (struct g726_desc *)s->_private;

   if (f->frametype != AST_FRAME_VOICE) {
      ast_log(LOG_WARNING, "Asked to write non-voice frame!\n");
      return -1;
   }
   if (f->subclass != AST_FORMAT_G726) {
      ast_log(LOG_WARNING, "Asked to write non-G726 frame (%d)!\n", 
                  f->subclass);
      return -1;
   }
   if (f->datalen % frame_size[fs->rate]) {
      ast_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.ptr, 1, f->datalen, s->f)) != f->datalen) {
      ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", 
            res, frame_size[fs->rate], strerror(errno));
         return -1;
   }
   return 0;
}

static int load_module ( void ) [static]

Definition at line 237 of file format_g726.c.

References ast_format_register, ast_log(), AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_SUCCESS, ast_format::format, LOG_WARNING, and name.

{
   int i;

   for (i = 0; f[i].format ; i++) {
      if (ast_format_register(&f[i])) {   /* errors are fatal */
         ast_log(LOG_WARNING, "Failed to register format %s.\n", f[i].name);
         return AST_MODULE_LOAD_FAILURE;
      }
   }
   return AST_MODULE_LOAD_SUCCESS;
}

static int unload_module ( void ) [static]

Definition at line 250 of file format_g726.c.

References ast_format_unregister(), ast_log(), ast_format::format, LOG_WARNING, and name.

{
   int i;

   for (i = 0; f[i].format ; i++) {
      if (ast_format_unregister(f[i].name))
         ast_log(LOG_WARNING, "Failed to unregister format %s.\n", f[i].name);
   }
   return(0);
}

Variable Documentation

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Raw G.726 (16/24/32/40kbps) data" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .load_pri = 10, } [static]

Definition at line 265 of file format_g726.c.

struct ast_module_info* ast_module_info = &__mod_info [static]

Definition at line 265 of file format_g726.c.

struct ast_format f[] [static]

Definition at line 177 of file format_g726.c.

Referenced by __adsi_transmit_messages(), __ast_format_register(), __ast_play_and_record(), __ast_queue_frame(), __ast_read(), __ast_request_and_dial(), __ast_smoother_feed(), __attempt_transmit(), __dahdi_exception(), adpcm_sample(), adsi_message(), agent_ack_sleep(), agent_read(), alaw_sample(), alloc_profile(), alsa_read(), app_exec(), ast_autoservice_stop(), ast_bridge_call(), ast_channel_free(), ast_config_text_file_save(), ast_dsp_frame_freed(), ast_el_read_history(), ast_filehelper(), ast_format_str_reduce(), ast_frame_header_new(), ast_generic_bridge(), ast_jb_destroy(), ast_read_image(), ast_readfile(), ast_recvtext(), ast_rtcp_read(), ast_rtp_read(), ast_rtp_write(), ast_safe_sleep_conditional(), ast_send_image(), ast_slinfactory_destroy(), ast_slinfactory_feed(), ast_tonepair(), ast_trans_frameout(), ast_translate(), ast_translate_frame_freed(), ast_udptl_bridge(), ast_ulaw_init(), ast_waitfordigit_full(), ast_write(), ast_writefile(), async_wait(), auth_exec(), autoservice_run(), calc_cost(), channel_spy(), check_goto_on_transfer(), close_logger(), compile_script(), conf_exec(), conf_flush(), conf_run(), config_text_file_load(), create_video_frame(), dahdi_accept_r2_call_exec(), dahdi_bridge(), dahdi_exception(), dahdi_handle_dtmf(), dahdi_handle_event(), dahdi_read(), dictate_exec(), disa_exec(), do_idle_thread(), do_waiting(), echo_exec(), eivr_comm(), execif_exec(), fakesrc_sample(), feature_request_and_dial(), filestream_destructor(), find_cache(), fn_wrapper(), frame_cache_cleanup(), function_realtime_store(), g722_sample(), g726_sample(), gen_generate(), gen_readframe(), get_bit_raw(), gsm_sample(), gtalk_rtp_read(), h261_encap(), h263_encap(), h263p_encap(), h264_encap(), handle_cli_core_show_file_formats(), handle_cli_file_convert(), handle_recordfile(), http_post_callback(), iax2_bridge(), iax2_trunk_queue(), iax_park_thread(), ices_exec(), ilbc_sample(), isAnsweringMachine(), jack_exec(), jb_empty_and_reset_adaptive(), jb_get_and_deliver(), jingle_rtp_read(), key_history(), launch_asyncagi(), lintoadpcm_frameout(), load_file(), lpc10_sample(), lua_read_extensions_file(), main(), manage_parkinglot(), masq_park_call(), measurenoise(), mgcp_read(), mgcp_rtp_read(), misdn_bridge(), misdn_lib_nt_debug_init(), moh_files_generator(), moh_files_readframe(), mp3_exec(), mpeg4_encap(), NBScat_exec(), network_thread(), oh323_rtp_read(), op_func(), oss_read(), parse(), process_ast_dsp(), process_cisco_dtmf(), process_rfc2833(), process_rfc3389(), readdirqueue(), receive_dtmf_digits(), record_exec(), recordthread(), reload_followme(), reload_logger(), remove_from_queue(), rpt(), rpt_exec(), rtpread(), run_agi(), safe_append(), scan_service(), send_string(), send_tone_burst(), send_waveform_to_channel(), sendurl_exec(), show_history(), sip_rtp_read(), skinny_rtp_read(), slin16_sample(), slin8_sample(), sms_handleincoming_proto2(), sms_hexdump(), speech_background(), speex_sample(), spy_generate(), ss_thread(), store_rxctcssadj(), store_rxgain(), store_rxvoiceadj(), strip_quotes(), testclient_exec(), testserver_exec(), try_load_key(), udptlread(), ulaw_sample(), unistim_rtp_read(), unload_module(), usbradio_read(), vnak_retransmit(), wait_for_answer(), wait_for_hangup(), wait_for_winner(), waitforring_exec(), write_history(), and writefile().

int frame_size[4] [static]

Definition at line 49 of file format_g726.c.

Asterisk developer's documentation

Data Structures

Defines

Functions

Variables

Detailed Description

Define Documentation

Function Documentation

Variable Documentation