Sun Jun 12 16:37:58 2011

Asterisk developer's documentation


frame.h File Reference

Asterisk internal frame definitions. More...

#include <sys/types.h>
#include <sys/time.h>
#include "asterisk/compiler.h"
#include "asterisk/endian.h"
#include "asterisk/linkedlists.h"

Include dependency graph for frame.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Data Structures

struct  ast_codec_pref
struct  ast_format_list
 Definition of supported media formats (codecs). More...
struct  ast_frame
 Data structure associated with a single frame of data. More...
struct  ast_option_header
struct  oprmode

Defines

#define AST_FORMAT_ADPCM   (1 << 5)
#define AST_FORMAT_ALAW   (1 << 3)
#define AST_FORMAT_AUDIO_MASK   ((1 << 16)-1)
#define AST_FORMAT_G722   (1 << 12)
#define AST_FORMAT_G723_1   (1 << 0)
#define AST_FORMAT_G726   (1 << 11)
#define AST_FORMAT_G726_AAL2   (1 << 4)
#define AST_FORMAT_G729A   (1 << 8)
#define AST_FORMAT_GSM   (1 << 1)
#define AST_FORMAT_H261   (1 << 18)
#define AST_FORMAT_H263   (1 << 19)
#define AST_FORMAT_H263_PLUS   (1 << 20)
#define AST_FORMAT_H264   (1 << 21)
#define AST_FORMAT_ILBC   (1 << 10)
#define AST_FORMAT_JPEG   (1 << 16)
#define AST_FORMAT_LPC10   (1 << 7)
#define AST_FORMAT_MAX_AUDIO   (1 << 15)
#define AST_FORMAT_MAX_VIDEO   (1 << 24)
#define AST_FORMAT_PNG   (1 << 17)
#define AST_FORMAT_SLINEAR   (1 << 6)
#define AST_FORMAT_SPEEX   (1 << 9)
#define AST_FORMAT_ULAW   (1 << 2)
#define AST_FORMAT_VIDEO_MASK   (((1 << 25)-1) & ~(AST_FORMAT_AUDIO_MASK))
#define ast_frame_byteswap_be(fr)   do { struct ast_frame *__f = (fr); ast_swapcopy_samples(__f->data, __f->data, __f->samples); } while(0)
#define ast_frame_byteswap_le(fr)   do { ; } while(0)
#define AST_FRAME_DTMF   AST_FRAME_DTMF_END
#define AST_FRAME_SET_BUFFER(fr, _base, _ofs, _datalen)
#define ast_frfree(fr)   ast_frame_free(fr, 1)
#define AST_FRIENDLY_OFFSET   64
#define AST_HTML_BEGIN   4
#define AST_HTML_DATA   2
#define AST_HTML_END   8
#define AST_HTML_LDCOMPLETE   16
#define AST_HTML_LINKREJECT   20
#define AST_HTML_LINKURL   18
#define AST_HTML_NOSUPPORT   17
#define AST_HTML_UNLINK   19
#define AST_HTML_URL   1
#define AST_MALLOCD_DATA   (1 << 1)
#define AST_MALLOCD_HDR   (1 << 0)
#define AST_MALLOCD_SRC   (1 << 2)
#define AST_MIN_OFFSET   32
#define AST_MODEM_T38   1
#define AST_MODEM_V150   2
#define AST_OPTION_AUDIO_MODE   4
#define AST_OPTION_ECHOCAN   8
#define AST_OPTION_FLAG_ACCEPT   1
#define AST_OPTION_FLAG_ANSWER   5
#define AST_OPTION_FLAG_QUERY   4
#define AST_OPTION_FLAG_REJECT   2
#define AST_OPTION_FLAG_REQUEST   0
#define AST_OPTION_FLAG_WTF   6
#define AST_OPTION_OPRMODE   7
#define AST_OPTION_RELAXDTMF   3
#define AST_OPTION_RXGAIN   6
#define AST_OPTION_TDD   2
#define AST_OPTION_TONE_VERIFY   1
#define AST_OPTION_TXGAIN   5
#define ast_smoother_feed(s, f)   __ast_smoother_feed(s, f, 0)
#define ast_smoother_feed_be(s, f)   __ast_smoother_feed(s, f, 1)
#define ast_smoother_feed_le(s, f)   __ast_smoother_feed(s, f, 0)
#define AST_SMOOTHER_FLAG_BE   (1 << 1)
#define AST_SMOOTHER_FLAG_G729   (1 << 0)

Enumerations

enum  { AST_FRFLAG_HAS_TIMING_INFO = (1 << 0), AST_FRFLAG_FROM_TRANSLATOR = (1 << 1), AST_FRFLAG_FROM_DSP = (1 << 2) }
enum  ast_control_frame_type {
  AST_CONTROL_HANGUP = 1, AST_CONTROL_RING = 2, AST_CONTROL_RINGING = 3, AST_CONTROL_ANSWER = 4,
  AST_CONTROL_BUSY = 5, AST_CONTROL_TAKEOFFHOOK = 6, AST_CONTROL_OFFHOOK = 7, AST_CONTROL_CONGESTION = 8,
  AST_CONTROL_FLASH = 9, AST_CONTROL_WINK = 10, AST_CONTROL_OPTION = 11, AST_CONTROL_RADIO_KEY = 12,
  AST_CONTROL_RADIO_UNKEY = 13, AST_CONTROL_PROGRESS = 14, AST_CONTROL_PROCEEDING = 15, AST_CONTROL_HOLD = 16,
  AST_CONTROL_UNHOLD = 17, AST_CONTROL_VIDUPDATE = 18, AST_CONTROL_SRCUPDATE = 20, AST_CONTROL_SRCCHANGE = 21
}
enum  ast_frame_type {
  AST_FRAME_DTMF_END = 1, AST_FRAME_VOICE, AST_FRAME_VIDEO, AST_FRAME_CONTROL,
  AST_FRAME_NULL, AST_FRAME_IAX, AST_FRAME_TEXT, AST_FRAME_IMAGE,
  AST_FRAME_HTML, AST_FRAME_CNG, AST_FRAME_MODEM, AST_FRAME_DTMF_BEGIN
}
 Frame types. More...

Functions

int __ast_smoother_feed (struct ast_smoother *s, struct ast_frame *f, int swap)
char * ast_codec2str (int codec)
 Get a name from a format Gets a name from a format.
int ast_codec_choose (struct ast_codec_pref *pref, int formats, int find_best)
 Select the best audio format according to preference list from supplied options. If "find_best" is non-zero then if nothing is found, the "Best" format of the format list is selected, otherwise 0 is returned.
int ast_codec_get_len (int format, int samples)
 Returns the number of bytes for the number of samples of the given format.
int ast_codec_get_samples (struct ast_frame *f)
 Returns the number of samples contained in the frame.
static int ast_codec_interp_len (int format)
 Gets duration in ms of interpolation frame for a format.
int ast_codec_pref_append (struct ast_codec_pref *pref, int format)
 Append a audio codec to a preference list, removing it first if it was already there.
void ast_codec_pref_convert (struct ast_codec_pref *pref, char *buf, size_t size, int right)
 Shift an audio codec preference list up or down 65 bytes so that it becomes an ASCII string.
struct ast_format_list ast_codec_pref_getsize (struct ast_codec_pref *pref, int format)
 Get packet size for codec.
int ast_codec_pref_index (struct ast_codec_pref *pref, int index)
 Codec located at a particular place in the preference index See Audio Codec Preferences.
void ast_codec_pref_init (struct ast_codec_pref *pref)
 Initialize an audio codec preference to "no preference" See Audio Codec Preferences.
void ast_codec_pref_prepend (struct ast_codec_pref *pref, int format, int only_if_existing)
 Prepend an audio codec to a preference list, removing it first if it was already there.
void ast_codec_pref_remove (struct ast_codec_pref *pref, int format)
 Remove audio a codec from a preference list.
int ast_codec_pref_setsize (struct ast_codec_pref *pref, int format, int framems)
 Set packet size for codec.
int ast_codec_pref_string (struct ast_codec_pref *pref, char *buf, size_t size)
 Dump audio codec preference list into a string.
static force_inline int ast_format_rate (int format)
 Get the sample rate for a given format.
int ast_frame_adjust_volume (struct ast_frame *f, int adjustment)
 Adjusts the volume of the audio samples contained in a frame.
void ast_frame_dump (const char *name, struct ast_frame *f, char *prefix)
struct ast_frameast_frame_enqueue (struct ast_frame *head, struct ast_frame *f, int maxlen, int dupe)
 Appends a frame to the end of a list of frames, truncating the maximum length of the list.
void ast_frame_free (struct ast_frame *fr, int cache)
 Requests a frame to be allocated.
int ast_frame_slinear_sum (struct ast_frame *f1, struct ast_frame *f2)
 Sums two frames of audio samples.
struct ast_frameast_frdup (const struct ast_frame *fr)
 Copies a frame.
struct ast_frameast_frisolate (struct ast_frame *fr)
 Makes a frame independent of any static storage.
struct ast_format_listast_get_format_list (size_t *size)
struct ast_format_listast_get_format_list_index (int index)
int ast_getformatbyname (const char *name)
 Gets a format from a name.
char * ast_getformatname (int format)
 Get the name of a format.
char * ast_getformatname_multiple (char *buf, size_t size, int format)
 Get the names of a set of formats.
void ast_parse_allow_disallow (struct ast_codec_pref *pref, int *mask, const char *list, int allowing)
 Parse an "allow" or "deny" line in a channel or device configuration and update the capabilities mask and pref if provided. Video codecs are not added to codec preference lists, since we can not transcode.
void ast_smoother_free (struct ast_smoother *s)
int ast_smoother_get_flags (struct ast_smoother *smoother)
struct ast_smootherast_smoother_new (int bytes)
struct ast_frameast_smoother_read (struct ast_smoother *s)
void ast_smoother_reset (struct ast_smoother *s, int bytes)
void ast_smoother_set_flags (struct ast_smoother *smoother, int flags)
int ast_smoother_test_flag (struct ast_smoother *s, int flag)
void ast_swapcopy_samples (void *dst, const void *src, int samples)

Variables

struct ast_frame ast_null_frame


Detailed Description

Asterisk internal frame definitions.

Definition in file frame.h.


Define Documentation

#define AST_FORMAT_ADPCM   (1 << 5)

#define AST_FORMAT_ALAW   (1 << 3)

#define AST_FORMAT_AUDIO_MASK   ((1 << 16)-1)

#define AST_FORMAT_G722   (1 << 12)

#define AST_FORMAT_G723_1   (1 << 0)

#define AST_FORMAT_G726   (1 << 11)

ADPCM (G.726, 32kbps, RFC3551 codeword packing)

Definition at line 257 of file frame.h.

Referenced by ast_best_codec(), ast_codec_get_len(), ast_codec_get_samples(), ast_rtp_set_rtpmap_type(), g726_read(), g726_write(), and g726tolin_sample().

#define AST_FORMAT_G726_AAL2   (1 << 4)

ADPCM (G.726, 32kbps, AAL2 codeword packing)

Definition at line 243 of file frame.h.

Referenced by ast_best_codec(), ast_codec_get_len(), ast_codec_get_samples(), ast_rtp_lookup_mime_subtype(), ast_rtp_set_rtpmap_type(), codec_ast2skinny(), and codec_skinny2ast().

#define AST_FORMAT_G729A   (1 << 8)

#define AST_FORMAT_GSM   (1 << 1)

#define AST_FORMAT_H261   (1 << 18)

H.261 Video

Definition at line 269 of file frame.h.

Referenced by codec_ast2skinny(), and codec_skinny2ast().

#define AST_FORMAT_H263   (1 << 19)

H.263 Video

Definition at line 271 of file frame.h.

Referenced by codec_ast2skinny(), codec_skinny2ast(), h263_read(), and h263_write().

#define AST_FORMAT_H263_PLUS   (1 << 20)

H.263+ Video

Definition at line 273 of file frame.h.

#define AST_FORMAT_H264   (1 << 21)

H.264 Video

Definition at line 275 of file frame.h.

Referenced by h264_read(), and h264_write().

#define AST_FORMAT_ILBC   (1 << 10)

#define AST_FORMAT_JPEG   (1 << 16)

JPEG Images

Definition at line 265 of file frame.h.

Referenced by jpeg_read_image(), and jpeg_write_image().

#define AST_FORMAT_LPC10   (1 << 7)

LPC10, 180 samples/frame

Definition at line 249 of file frame.h.

Referenced by ast_best_codec(), ast_codec_get_samples(), and lpc10tolin_sample().

#define AST_FORMAT_MAX_AUDIO   (1 << 15)

#define AST_FORMAT_MAX_VIDEO   (1 << 24)

Maximum video format

Definition at line 277 of file frame.h.

Referenced by add_sdp(), ast_openvstream(), and ast_translate_available_formats().

#define AST_FORMAT_PNG   (1 << 17)

PNG Images

Definition at line 267 of file frame.h.

Referenced by phone_read().

#define AST_FORMAT_SLINEAR   (1 << 6)

Raw 16-bit Signed Linear (8000 Hz) PCM

Definition at line 247 of file frame.h.

Referenced by __ast_play_and_record(), __ast_register_translator(), action_originate(), agent_new(), alsa_new(), alsa_read(), alsa_request(), ast_audiohook_read_frame(), ast_best_codec(), ast_channel_make_compatible(), ast_channel_start_silence_generator(), ast_codec_get_len(), ast_codec_get_samples(), ast_dsp_call_progress(), ast_dsp_digitdetect(), ast_dsp_process(), ast_dsp_silence(), ast_frame_adjust_volume(), ast_frame_slinear_sum(), ast_rtp_read(), ast_send_message(), ast_slinfactory_feed(), attempt_reconnect(), attempt_thread(), audio_audiohook_write_list(), audiohook_read_frame_both(), audiohook_read_frame_single(), background_detect_exec(), build_conf(), chanspy_exec(), chanspychan_exec(), conf_run(), connect_link(), dictate_exec(), do_waiting(), eagi_exec(), extenspy_exec(), fast_originate(), handle_recordfile(), iax_frame_wrap(), ices_exec(), isAnsweringMachine(), linear_alloc(), linear_generator(), lintoadpcm_sample(), lintoalaw_sample(), lintog726_sample(), lintogsm_sample(), lintolpc10_sample(), lintospeex_sample(), lintoulaw_sample(), load_module(), load_moh_classes(), measurenoise(), misdn_set_opt_exec(), mixmonitor_thread(), moh_class_malloc(), mp3_exec(), nbs_request(), nbs_xwrite(), NBScat_exec(), ogg_vorbis_read(), ogg_vorbis_write(), oh323_rtp_read(), orig_app(), orig_exten(), oss_new(), oss_read(), oss_request(), parkandannounce_exec(), phone_new(), phone_read(), phone_request(), phone_setup(), phone_write(), playtones_alloc(), playtones_generator(), read_config(), record_exec(), rpt(), rpt_call(), rpt_exec(), rpt_tele_thread(), run_agi(), send_waveform_to_channel(), silence_generator_generate(), slinear_read(), slinear_write(), sms_exec(), sms_generate(), socket_process(), speech_background(), speech_create(), spy_generate(), tonepair_alloc(), tonepair_generator(), wav_read(), wav_write(), xagi_exec(), zt_new(), zt_read(), and zt_write().

#define AST_FORMAT_SPEEX   (1 << 9)

SpeeX Free Compression

Definition at line 253 of file frame.h.

Referenced by ast_best_codec(), ast_codec_get_samples(), ast_rtp_write(), convertcap(), and speextolin_sample().

#define AST_FORMAT_ULAW   (1 << 2)

#define AST_FORMAT_VIDEO_MASK   (((1 << 25)-1) & ~(AST_FORMAT_AUDIO_MASK))

#define ast_frame_byteswap_be ( fr   )     do { struct ast_frame *__f = (fr); ast_swapcopy_samples(__f->data, __f->data, __f->samples); } while(0)

Definition at line 430 of file frame.h.

Referenced by ast_rtp_read(), and socket_process().

#define ast_frame_byteswap_le ( fr   )     do { ; } while(0)

Definition at line 429 of file frame.h.

Referenced by phone_read().

#define AST_FRAME_DTMF   AST_FRAME_DTMF_END

#define AST_FRAME_SET_BUFFER ( fr,
_base,
_ofs,
_datalen   ) 

Value:

{              \
   (fr)->data = (char *)_base + (_ofs);   \
   (fr)->offset = (_ofs);        \
   (fr)->datalen = (_datalen);      \
   }
Set the various field of a frame to point to a buffer. Typically you set the base address of the buffer, the offset as AST_FRIENDLY_OFFSET, and the datalen as the amount of bytes queued. The remaining things (to be done manually) is set the number of samples, which cannot be derived from the datalen unless you know the number of bits per sample.

Definition at line 184 of file frame.h.

Referenced by g723_read(), g726_read(), g729_read(), gsm_read(), h263_read(), h264_read(), ilbc_read(), ogg_vorbis_read(), pcm_read(), slinear_read(), vox_read(), and wav_read().

#define ast_frfree ( fr   )     ast_frame_free(fr, 1)

Definition at line 405 of file frame.h.

Referenced by __adsi_transmit_messages(), __ast_play_and_record(), __ast_read(), __ast_request_and_dial_uniqueid(), adsi_careful_send(), agent_ack_sleep(), agent_read(), app_exec(), ast_audiohook_read_frame(), ast_autoservice_stop(), ast_bridge_call(), ast_channel_free(), ast_dsp_process(), ast_feature_request_and_dial(), ast_generic_bridge(), ast_jb_destroy(), ast_jb_put(), ast_masq_autoanswer_login(), ast_masq_hold_call(), ast_masq_park_call(), ast_queue_frame(), ast_recvtext(), ast_rtp_write(), ast_safe_sleep_conditional(), ast_send_image(), ast_slinfactory_destroy(), ast_slinfactory_feed(), ast_slinfactory_flush(), ast_slinfactory_read(), ast_tonepair(), ast_translate(), ast_udptl_bridge(), ast_waitfordigit_full(), ast_write(), ast_writestream(), async_wait(), audio_audiohook_write_list(), autoservice_run(), background_detect_exec(), bridge_native_loop(), bridge_p2p_loop(), builtin_atxfer(), calc_cost(), channel_spy(), check_goto_on_transfer(), conf_exec(), conf_flush(), conf_free(), conf_run(), create_jb(), dictate_exec(), disa_exec(), do_autoanswer_thread(), do_holding_thread(), do_parking_thread(), do_waiting(), echo_exec(), find_cache(), gen_generate(), handle_invite_replaces(), handle_recordfile(), iax2_bridge(), iax_park_thread(), ices_exec(), isAnsweringMachine(), jb_get_and_deliver(), measurenoise(), moh_files_generator(), monitor_dial(), mp3_exec(), NBScat_exec(), receive_dtmf_digits(), record_exec(), recordthread(), rpt(), rpt_exec(), run_agi(), send_tone_burst(), send_waveform_to_channel(), sendurl_exec(), sms_exec(), speech_background(), spy_generate(), ss_thread(), wait_for_answer(), wait_for_hangup(), wait_for_winner(), waitforring_exec(), waitstream_core(), and zt_bridge().

#define AST_FRIENDLY_OFFSET   64

#define AST_HTML_BEGIN   4

Beginning frame

Definition at line 219 of file frame.h.

Referenced by ast_frame_dump().

#define AST_HTML_DATA   2

Data frame

Definition at line 217 of file frame.h.

Referenced by ast_frame_dump().

#define AST_HTML_END   8

End frame

Definition at line 221 of file frame.h.

Referenced by ast_frame_dump().

#define AST_HTML_LDCOMPLETE   16

Load is complete

Definition at line 223 of file frame.h.

Referenced by ast_frame_dump(), and sendurl_exec().

#define AST_HTML_LINKREJECT   20

Reject link request

Definition at line 231 of file frame.h.

Referenced by ast_frame_dump().

#define AST_HTML_LINKURL   18

Send URL, and track

Definition at line 227 of file frame.h.

Referenced by ast_frame_dump().

#define AST_HTML_NOSUPPORT   17

Peer is unable to support HTML

Definition at line 225 of file frame.h.

Referenced by ast_frame_dump(), and sendurl_exec().

#define AST_HTML_UNLINK   19

No more HTML linkage

Definition at line 229 of file frame.h.

Referenced by ast_frame_dump().

#define AST_HTML_URL   1

Sending a URL

Definition at line 215 of file frame.h.

Referenced by ast_channel_sendurl(), and ast_frame_dump().

#define AST_MALLOCD_DATA   (1 << 1)

Need the data be free'd?

Definition at line 203 of file frame.h.

Referenced by ast_frame_free(), and ast_frisolate().

#define AST_MALLOCD_HDR   (1 << 0)

Need the header be free'd?

Definition at line 201 of file frame.h.

Referenced by ast_frame_free(), ast_frame_header_new(), ast_frdup(), and ast_frisolate().

#define AST_MALLOCD_SRC   (1 << 2)

Need the source be free'd? (haha!)

Definition at line 205 of file frame.h.

Referenced by ast_frame_free(), and ast_frisolate().

#define AST_MIN_OFFSET   32

Definition at line 198 of file frame.h.

Referenced by __ast_smoother_feed().

#define AST_MODEM_T38   1

T.38 Fax-over-IP

Definition at line 209 of file frame.h.

Referenced by ast_frame_dump(), and udptl_rx_packet().

#define AST_MODEM_V150   2

V.150 Modem-over-IP

Definition at line 211 of file frame.h.

Referenced by ast_frame_dump().

#define AST_OPTION_AUDIO_MODE   4

Set (or clear) Audio (Not-Clear) Mode

Definition at line 325 of file frame.h.

Referenced by zt_hangup(), and zt_setoption().

#define AST_OPTION_ECHOCAN   8

Explicitly enable or disable echo cancelation for the given channel

Definition at line 347 of file frame.h.

Referenced by zt_setoption().

#define AST_OPTION_FLAG_ACCEPT   1

Definition at line 308 of file frame.h.

#define AST_OPTION_FLAG_ANSWER   5

Definition at line 311 of file frame.h.

#define AST_OPTION_FLAG_QUERY   4

Definition at line 310 of file frame.h.

#define AST_OPTION_FLAG_REJECT   2

Definition at line 309 of file frame.h.

#define AST_OPTION_FLAG_REQUEST   0

Definition at line 307 of file frame.h.

Referenced by ast_bridge_call(), and iax2_setoption().

#define AST_OPTION_FLAG_WTF   6

Definition at line 312 of file frame.h.

#define AST_OPTION_OPRMODE   7

Definition at line 344 of file frame.h.

Referenced by zt_setoption().

#define AST_OPTION_RELAXDTMF   3

Relax the parameters for DTMF reception (mainly for radio use)

Definition at line 322 of file frame.h.

Referenced by rpt(), and zt_setoption().

#define AST_OPTION_RXGAIN   6

Set channel receive gain Option data is a single signed char representing number of decibels (dB) to set gain to (on top of any gain specified in channel driver)

Definition at line 341 of file frame.h.

Referenced by func_channel_write(), iax2_setoption(), play_record_review(), reset_volumes(), set_talk_volume(), vm_forwardoptions(), and zt_setoption().

#define AST_OPTION_TDD   2

Put a compatible channel into TDD (TTY for the hearing-impared) mode

Definition at line 319 of file frame.h.

Referenced by handle_tddmode(), zt_hangup(), and zt_setoption().

#define AST_OPTION_TONE_VERIFY   1

Verify touchtones by muting audio transmission (and reception) and verify the tone is still present

Definition at line 316 of file frame.h.

Referenced by conf_run(), rpt(), rpt_exec(), try_calling(), zt_hangup(), and zt_setoption().

#define AST_OPTION_TXGAIN   5

Set channel transmit gain Option data is a single signed char representing number of decibels (dB) to set gain to (on top of any gain specified in channel driver)

Definition at line 333 of file frame.h.

Referenced by common_exec(), func_channel_write(), iax2_setoption(), reset_volumes(), set_listen_volume(), and zt_setoption().

#define ast_smoother_feed ( s,
f   )     __ast_smoother_feed(s, f, 0)

Definition at line 479 of file frame.h.

Referenced by ast_rtp_write().

#define ast_smoother_feed_be ( s,
f   )     __ast_smoother_feed(s, f, 1)

Definition at line 481 of file frame.h.

Referenced by ast_rtp_write().

#define ast_smoother_feed_le ( s,
f   )     __ast_smoother_feed(s, f, 0)

Definition at line 482 of file frame.h.

#define AST_SMOOTHER_FLAG_BE   (1 << 1)

Definition at line 304 of file frame.h.

Referenced by ast_rtp_write().

#define AST_SMOOTHER_FLAG_G729   (1 << 0)

Definition at line 303 of file frame.h.

Referenced by __ast_smoother_feed(), and ast_smoother_read().


Enumeration Type Documentation

anonymous enum

Enumerator:
AST_FRFLAG_HAS_TIMING_INFO  This frame contains valid timing information
AST_FRFLAG_FROM_TRANSLATOR  This frame came from a translator and is still the original frame. The translator can not be free'd if the frame inside of it still has this flag set.
AST_FRFLAG_FROM_DSP  This frame came from a dsp and is still the original frame. The dsp cannot be free'd if the frame inside of it still has this flag set.

Definition at line 128 of file frame.h.

00128      {
00129    /*! This frame contains valid timing information */
00130    AST_FRFLAG_HAS_TIMING_INFO = (1 << 0),
00131    /*! This frame came from a translator and is still the original frame.
00132     *  The translator can not be free'd if the frame inside of it still has
00133     *  this flag set. */
00134    AST_FRFLAG_FROM_TRANSLATOR = (1 << 1),
00135    /*! This frame came from a dsp and is still the original frame.
00136     *  The dsp cannot be free'd if the frame inside of it still has
00137     *  this flag set. */
00138    AST_FRFLAG_FROM_DSP = (1 << 2),
00139 };

Enumerator:
AST_CONTROL_HANGUP  Other end has hungup
AST_CONTROL_RING  Local ring
AST_CONTROL_RINGING  Remote end is ringing
AST_CONTROL_ANSWER  Remote end has answered
AST_CONTROL_BUSY  Remote end is busy
AST_CONTROL_TAKEOFFHOOK  Make it go off hook
AST_CONTROL_OFFHOOK  Line is off hook
AST_CONTROL_CONGESTION  Congestion (circuits busy)
AST_CONTROL_FLASH  Flash hook
AST_CONTROL_WINK  Wink
AST_CONTROL_OPTION  Set a low-level option
AST_CONTROL_RADIO_KEY  Key Radio
AST_CONTROL_RADIO_UNKEY  Un-Key Radio
AST_CONTROL_PROGRESS  Indicate PROGRESS
AST_CONTROL_PROCEEDING  Indicate CALL PROCEEDING
AST_CONTROL_HOLD  Indicate call is placed on hold
AST_CONTROL_UNHOLD  Indicate call is left from hold
AST_CONTROL_VIDUPDATE  Indicate video frame update
AST_CONTROL_SRCUPDATE  Indicate source of media has changed
AST_CONTROL_SRCCHANGE  Media has changed and requires a new RTP SSRC

Definition at line 280 of file frame.h.

00280                             {
00281    AST_CONTROL_HANGUP = 1,    /*!< Other end has hungup */
00282    AST_CONTROL_RING = 2,      /*!< Local ring */
00283    AST_CONTROL_RINGING = 3,   /*!< Remote end is ringing */
00284    AST_CONTROL_ANSWER = 4,    /*!< Remote end has answered */
00285    AST_CONTROL_BUSY = 5,      /*!< Remote end is busy */
00286    AST_CONTROL_TAKEOFFHOOK = 6,  /*!< Make it go off hook */
00287    AST_CONTROL_OFFHOOK = 7,   /*!< Line is off hook */
00288    AST_CONTROL_CONGESTION = 8,   /*!< Congestion (circuits busy) */
00289    AST_CONTROL_FLASH = 9,     /*!< Flash hook */
00290    AST_CONTROL_WINK = 10,     /*!< Wink */
00291    AST_CONTROL_OPTION = 11,   /*!< Set a low-level option */
00292    AST_CONTROL_RADIO_KEY = 12,   /*!< Key Radio */
00293    AST_CONTROL_RADIO_UNKEY = 13, /*!< Un-Key Radio */
00294    AST_CONTROL_PROGRESS = 14, /*!< Indicate PROGRESS */
00295    AST_CONTROL_PROCEEDING = 15,  /*!< Indicate CALL PROCEEDING */
00296    AST_CONTROL_HOLD = 16,     /*!< Indicate call is placed on hold */
00297    AST_CONTROL_UNHOLD = 17,   /*!< Indicate call is left from hold */
00298    AST_CONTROL_VIDUPDATE = 18,   /*!< Indicate video frame update */
00299    AST_CONTROL_SRCUPDATE = 20,     /*!< Indicate source of media has changed */
00300    AST_CONTROL_SRCCHANGE = 21,     /*!< Media has changed and requires a new RTP SSRC */
00301 };

Frame types.

Note:
It is important that the values of each frame type are never changed, because it will break backwards compatability with older versions.
Enumerator:
AST_FRAME_DTMF_END  DTMF end event, subclass is the digit
AST_FRAME_VOICE  Voice data, subclass is AST_FORMAT_*
AST_FRAME_VIDEO  Video frame, maybe?? :)
AST_FRAME_CONTROL  A control frame, subclass is AST_CONTROL_*
AST_FRAME_NULL  An empty, useless frame
AST_FRAME_IAX  Inter Asterisk Exchange private frame type
AST_FRAME_TEXT  Text messages
AST_FRAME_IMAGE  Image Frames
AST_FRAME_HTML  HTML Frame
AST_FRAME_CNG  Comfort Noise frame (subclass is level of CNG in -dBov), body may include zero or more 8-bit quantization coefficients
AST_FRAME_MODEM  Modem-over-IP data streams
AST_FRAME_DTMF_BEGIN  DTMF begin event, subclass is the digit

Definition at line 99 of file frame.h.

00099                     {
00100    /*! DTMF end event, subclass is the digit */
00101    AST_FRAME_DTMF_END = 1,
00102    /*! Voice data, subclass is AST_FORMAT_* */
00103    AST_FRAME_VOICE,
00104    /*! Video frame, maybe?? :) */
00105    AST_FRAME_VIDEO,
00106    /*! A control frame, subclass is AST_CONTROL_* */
00107    AST_FRAME_CONTROL,
00108    /*! An empty, useless frame */
00109    AST_FRAME_NULL,
00110    /*! Inter Asterisk Exchange private frame type */
00111    AST_FRAME_IAX,
00112    /*! Text messages */
00113    AST_FRAME_TEXT,
00114    /*! Image Frames */
00115    AST_FRAME_IMAGE,
00116    /*! HTML Frame */
00117    AST_FRAME_HTML,
00118    /*! Comfort Noise frame (subclass is level of CNG in -dBov), 
00119        body may include zero or more 8-bit quantization coefficients */
00120    AST_FRAME_CNG,
00121    /*! Modem-over-IP data streams */
00122    AST_FRAME_MODEM,  
00123    /*! DTMF begin event, subclass is the digit */
00124    AST_FRAME_DTMF_BEGIN,
00125 };


Function Documentation

int __ast_smoother_feed ( struct ast_smoother s,
struct ast_frame f,
int  swap 
)

Definition at line 172 of file frame.c.

References AST_FRAME_VOICE, ast_log(), AST_MIN_OFFSET, AST_SMOOTHER_FLAG_G729, ast_swapcopy_samples(), ast_smoother::data, ast_frame::data, ast_frame::datalen, ast_smoother::delivery, ast_frame::delivery, ast_smoother::flags, ast_smoother::format, ast_frame::frametype, ast_smoother::len, LOG_NOTICE, LOG_WARNING, ast_frame::offset, ast_smoother::opt, ast_frame::samples, ast_smoother::samplesperbyte, ast_smoother::size, SMOOTHER_SIZE, and ast_frame::subclass.

00173 {
00174    if (f->frametype != AST_FRAME_VOICE) {
00175       ast_log(LOG_WARNING, "Huh?  Can't smooth a non-voice frame!\n");
00176       return -1;
00177    }
00178    if (!s->format) {
00179       s->format = f->subclass;
00180       s->samplesperbyte = (float)f->samples / (float)f->datalen;
00181    } else if (s->format != f->subclass) {
00182       ast_log(LOG_WARNING, "Smoother was working on %d format frames, now trying to feed %d?\n", s->format, f->subclass);
00183       return -1;
00184    }
00185    if (s->len + f->datalen > SMOOTHER_SIZE) {
00186       ast_log(LOG_WARNING, "Out of smoother space\n");
00187       return -1;
00188    }
00189    if (((f->datalen == s->size) || ((f->datalen < 10) && (s->flags & AST_SMOOTHER_FLAG_G729)))
00190              && !s->opt && (f->offset >= AST_MIN_OFFSET)) {
00191       if (!s->len) {
00192          /* Optimize by sending the frame we just got
00193             on the next read, thus eliminating the douple
00194             copy */
00195          if (swap)
00196             ast_swapcopy_samples(f->data, f->data, f->samples);
00197          s->opt = f;
00198          return 0;
00199       }
00200    }
00201    if (s->flags & AST_SMOOTHER_FLAG_G729) {
00202       if (s->len % 10) {
00203          ast_log(LOG_NOTICE, "Dropping extra frame of G.729 since we already have a VAD frame at the end\n");
00204          return 0;
00205       }
00206    }
00207    if (swap)
00208       ast_swapcopy_samples(s->data+s->len, f->data, f->samples);
00209    else
00210       memcpy(s->data + s->len, f->data, f->datalen);
00211    /* If either side is empty, reset the delivery time */
00212    if (!s->len || ast_tvzero(f->delivery) || ast_tvzero(s->delivery))   /* XXX really ? */
00213       s->delivery = f->delivery;
00214    s->len += f->datalen;
00215    return 0;
00216 }

char* ast_codec2str ( int  codec  ) 

Get a name from a format Gets a name from a format.

Parameters:
codec codec number (1,2,4,8,16,etc.)
Returns:
This returns a static string identifying the format on success, 0 on error.

Definition at line 600 of file frame.c.

References ast_format_list::desc.

Referenced by moh_alloc(), show_codec_n(), show_codec_n_deprecated(), show_codecs(), and show_codecs_deprecated().

00601 {
00602    int x;
00603    char *ret = "unknown";
00604    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
00605       if(AST_FORMAT_LIST[x].visible && AST_FORMAT_LIST[x].bits == codec) {
00606          ret = AST_FORMAT_LIST[x].desc;
00607          break;
00608       }
00609    }
00610    return ret;
00611 }

int ast_codec_choose ( struct ast_codec_pref pref,
int  formats,
int  find_best 
)

Select the best audio format according to preference list from supplied options. If "find_best" is non-zero then if nothing is found, the "Best" format of the format list is selected, otherwise 0 is returned.

Definition at line 1280 of file frame.c.

References ast_best_codec(), AST_FORMAT_AUDIO_MASK, ast_log(), ast_format_list::bits, LOG_DEBUG, option_debug, and ast_codec_pref::order.

Referenced by __oh323_new(), gtalk_new(), process_sdp(), sip_new(), and socket_process().

01281 {
01282    int x, ret = 0, slot;
01283 
01284    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01285       slot = pref->order[x];
01286 
01287       if (!slot)
01288          break;
01289       if (formats & AST_FORMAT_LIST[slot-1].bits) {
01290          ret = AST_FORMAT_LIST[slot-1].bits;
01291          break;
01292       }
01293    }
01294    if(ret & AST_FORMAT_AUDIO_MASK)
01295       return ret;
01296 
01297    if (option_debug > 3)
01298       ast_log(LOG_DEBUG, "Could not find preferred codec - %s\n", find_best ? "Going for the best codec" : "Returning zero codec");
01299 
01300       return find_best ? ast_best_codec(formats) : 0;
01301 }

int ast_codec_get_len ( int  format,
int  samples 
)

Returns the number of bytes for the number of samples of the given format.

Definition at line 1539 of file frame.c.

References AST_FORMAT_ADPCM, AST_FORMAT_ALAW, AST_FORMAT_G722, AST_FORMAT_G726, AST_FORMAT_G726_AAL2, AST_FORMAT_G729A, AST_FORMAT_GSM, AST_FORMAT_ILBC, AST_FORMAT_SLINEAR, AST_FORMAT_ULAW, ast_getformatname(), ast_log(), len, and LOG_WARNING.

Referenced by moh_generate(), and monmp3thread().

01540 {
01541    int len = 0;
01542 
01543    /* XXX Still need speex, g723, and lpc10 XXX */ 
01544    switch(format) {
01545    case AST_FORMAT_ILBC:
01546       len = (samples / 240) * 50;
01547       break;
01548    case AST_FORMAT_GSM:
01549       len = (samples / 160) * 33;
01550       break;
01551    case AST_FORMAT_G729A:
01552       len = samples / 8;
01553       break;
01554    case AST_FORMAT_SLINEAR:
01555       len = samples * 2;
01556       break;
01557    case AST_FORMAT_ULAW:
01558    case AST_FORMAT_ALAW:
01559       len = samples;
01560       break;
01561    case AST_FORMAT_G722:
01562    case AST_FORMAT_ADPCM:
01563    case AST_FORMAT_G726:
01564    case AST_FORMAT_G726_AAL2:
01565       len = samples / 2;
01566       break;
01567    default:
01568       ast_log(LOG_WARNING, "Unable to calculate sample length for format %s\n", ast_getformatname(format));
01569    }
01570 
01571    return len;
01572 }

int ast_codec_get_samples ( struct ast_frame f  ) 

Returns the number of samples contained in the frame.

Definition at line 1496 of file frame.c.

References AST_FORMAT_ADPCM, AST_FORMAT_ALAW, AST_FORMAT_G722, AST_FORMAT_G723_1, AST_FORMAT_G726, AST_FORMAT_G726_AAL2, AST_FORMAT_G729A, AST_FORMAT_GSM, AST_FORMAT_ILBC, AST_FORMAT_LPC10, AST_FORMAT_SLINEAR, AST_FORMAT_SPEEX, AST_FORMAT_ULAW, ast_getformatname(), ast_log(), ast_frame::data, ast_frame::datalen, g723_samples(), LOG_WARNING, speex_samples(), and ast_frame::subclass.

Referenced by ast_rtp_read(), isAnsweringMachine(), moh_generate(), schedule_delivery(), and socket_process().

01497 {
01498    int samples=0;
01499    switch(f->subclass) {
01500    case AST_FORMAT_SPEEX:
01501       samples = speex_samples(f->data, f->datalen);
01502       break;
01503    case AST_FORMAT_G723_1:
01504                 samples = g723_samples(f->data, f->datalen);
01505       break;
01506    case AST_FORMAT_ILBC:
01507       samples = 240 * (f->datalen / 50);
01508       break;
01509    case AST_FORMAT_GSM:
01510       samples = 160 * (f->datalen / 33);
01511       break;
01512    case AST_FORMAT_G729A:
01513       samples = f->datalen * 8;
01514       break;
01515    case AST_FORMAT_SLINEAR:
01516       samples = f->datalen / 2;
01517       break;
01518    case AST_FORMAT_LPC10:
01519                 /* assumes that the RTP packet contains one LPC10 frame */
01520       samples = 22 * 8;
01521       samples += (((char *)(f->data))[7] & 0x1) * 8;
01522       break;
01523    case AST_FORMAT_ULAW:
01524    case AST_FORMAT_ALAW:
01525       samples = f->datalen;
01526       break;
01527    case AST_FORMAT_G722:
01528    case AST_FORMAT_ADPCM:
01529    case AST_FORMAT_G726:
01530    case AST_FORMAT_G726_AAL2:
01531       samples = f->datalen * 2;
01532       break;
01533    default:
01534       ast_log(LOG_WARNING, "Unable to calculate samples for format %s\n", ast_getformatname(f->subclass));
01535    }
01536    return samples;
01537 }

static int ast_codec_interp_len ( int  format  )  [inline, static]

Gets duration in ms of interpolation frame for a format.

Definition at line 556 of file frame.h.

References AST_FORMAT_ILBC.

Referenced by __get_from_jb(), and jb_get_and_deliver().

00557 { 
00558    return (format == AST_FORMAT_ILBC) ? 30 : 20;
00559 }

int ast_codec_pref_append ( struct ast_codec_pref pref,
int  format 
)

Append a audio codec to a preference list, removing it first if it was already there.

Definition at line 1139 of file frame.c.

References ast_codec_pref_remove(), and ast_codec_pref::order.

Referenced by ast_parse_allow_disallow().

01140 {
01141    int x, newindex = 0;
01142 
01143    ast_codec_pref_remove(pref, format);
01144 
01145    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01146       if(AST_FORMAT_LIST[x].bits == format) {
01147          newindex = x + 1;
01148          break;
01149       }
01150    }
01151 
01152    if(newindex) {
01153       for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01154          if(!pref->order[x]) {
01155             pref->order[x] = newindex;
01156             break;
01157          }
01158       }
01159    }
01160 
01161    return x;
01162 }

void ast_codec_pref_convert ( struct ast_codec_pref pref,
char *  buf,
size_t  size,
int  right 
)

Shift an audio codec preference list up or down 65 bytes so that it becomes an ASCII string.

Definition at line 1041 of file frame.c.

References ast_codec_pref::order.

Referenced by check_access(), create_addr(), dump_prefs(), and socket_process().

01042 {
01043    int x, differential = (int) 'A', mem;
01044    char *from, *to;
01045 
01046    if(right) {
01047       from = pref->order;
01048       to = buf;
01049       mem = size;
01050    } else {
01051       to = pref->order;
01052       from = buf;
01053       mem = 32;
01054    }
01055 
01056    memset(to, 0, mem);
01057    for (x = 0; x < 32 ; x++) {
01058       if(!from[x])
01059          break;
01060       to[x] = right ? (from[x] + differential) : (from[x] - differential);
01061    }
01062 }

struct ast_format_list ast_codec_pref_getsize ( struct ast_codec_pref pref,
int  format 
) [read]

Get packet size for codec.

Definition at line 1241 of file frame.c.

References ast_format_list::bits, ast_format_list::cur_ms, ast_format_list::def_ms, format, ast_format_list::inc_ms, ast_format_list::max_ms, and ast_format_list::min_ms.

Referenced by add_codec_to_sdp(), ast_rtp_bridge(), ast_rtp_write(), handle_open_receive_channel_ack_message(), and transmit_connect().

01242 {
01243    int x, index = -1, framems = 0;
01244    struct ast_format_list fmt = {0};
01245 
01246    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01247       if(AST_FORMAT_LIST[x].bits == format) {
01248          fmt = AST_FORMAT_LIST[x];
01249          index = x;
01250          break;
01251       }
01252    }
01253 
01254    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01255       if(pref->order[x] == (index + 1)) {
01256          framems = pref->framing[x];
01257          break;
01258       }
01259    }
01260 
01261    /* size validation */
01262    if(!framems)
01263       framems = AST_FORMAT_LIST[index].def_ms;
01264 
01265    if(AST_FORMAT_LIST[index].inc_ms && framems % AST_FORMAT_LIST[index].inc_ms) /* avoid division by zero */
01266       framems -= framems % AST_FORMAT_LIST[index].inc_ms;
01267 
01268    if(framems < AST_FORMAT_LIST[index].min_ms)
01269       framems = AST_FORMAT_LIST[index].min_ms;
01270 
01271    if(framems > AST_FORMAT_LIST[index].max_ms)
01272       framems = AST_FORMAT_LIST[index].max_ms;
01273 
01274    fmt.cur_ms = framems;
01275 
01276    return fmt;
01277 }

int ast_codec_pref_index ( struct ast_codec_pref pref,
int  index 
)

Codec located at a particular place in the preference index See Audio Codec Preferences.

Definition at line 1099 of file frame.c.

References ast_format_list::bits, and ast_codec_pref::order.

Referenced by _sip_show_peer(), add_sdp(), ast_codec_pref_string(), function_iaxpeer(), function_sippeer(), gtalk_invite(), iax2_show_peer(), print_codec_to_cli(), and socket_process().

01100 {
01101    int slot = 0;
01102 
01103    
01104    if((index >= 0) && (index < sizeof(pref->order))) {
01105       slot = pref->order[index];
01106    }
01107 
01108    return slot ? AST_FORMAT_LIST[slot-1].bits : 0;
01109 }

void ast_codec_pref_init ( struct ast_codec_pref pref  ) 

Initialize an audio codec preference to "no preference" See Audio Codec Preferences.

void ast_codec_pref_prepend ( struct ast_codec_pref pref,
int  format,
int  only_if_existing 
)

Prepend an audio codec to a preference list, removing it first if it was already there.

Definition at line 1165 of file frame.c.

References ARRAY_LEN, ast_codec_pref::framing, and ast_codec_pref::order.

Referenced by create_addr().

01166 {
01167    int x, newindex = 0;
01168 
01169    /* First step is to get the codecs "index number" */
01170    for (x = 0; x < ARRAY_LEN(AST_FORMAT_LIST); x++) {
01171       if (AST_FORMAT_LIST[x].bits == format) {
01172          newindex = x + 1;
01173          break;
01174       }
01175    }
01176    /* Done if its unknown */
01177    if (!newindex)
01178       return;
01179 
01180    /* Now find any existing occurrence, or the end */
01181    for (x = 0; x < 32; x++) {
01182       if (!pref->order[x] || pref->order[x] == newindex)
01183          break;
01184    }
01185 
01186    if (only_if_existing && !pref->order[x])
01187       return;
01188 
01189    /* Move down to make space to insert - either all the way to the end,
01190       or as far as the existing location (which will be overwritten) */
01191    for (; x > 0; x--) {
01192       pref->order[x] = pref->order[x - 1];
01193       pref->framing[x] = pref->framing[x - 1];
01194    }
01195 
01196    /* And insert the new entry */
01197    pref->order[0] = newindex;
01198    pref->framing[0] = 0; /* ? */
01199 }

void ast_codec_pref_remove ( struct ast_codec_pref pref,
int  format 
)

Remove audio a codec from a preference list.

Definition at line 1112 of file frame.c.

References ast_codec_pref::framing, and ast_codec_pref::order.

Referenced by ast_codec_pref_append(), and ast_parse_allow_disallow().

01113 {
01114    struct ast_codec_pref oldorder;
01115    int x, y = 0;
01116    int slot;
01117    int size;
01118 
01119    if(!pref->order[0])
01120       return;
01121 
01122    memcpy(&oldorder, pref, sizeof(oldorder));
01123    memset(pref, 0, sizeof(*pref));
01124 
01125    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01126       slot = oldorder.order[x];
01127       size = oldorder.framing[x];
01128       if(! slot)
01129          break;
01130       if(AST_FORMAT_LIST[slot-1].bits != format) {
01131          pref->order[y] = slot;
01132          pref->framing[y++] = size;
01133       }
01134    }
01135    
01136 }

int ast_codec_pref_setsize ( struct ast_codec_pref pref,
int  format,
int  framems 
)

Set packet size for codec.

Definition at line 1202 of file frame.c.

References ast_format_list::def_ms, ast_codec_pref::framing, ast_format_list::inc_ms, ast_format_list::max_ms, ast_format_list::min_ms, and ast_codec_pref::order.

Referenced by ast_parse_allow_disallow(), and process_sdp().

01203 {
01204    int x, index = -1;
01205 
01206    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01207       if(AST_FORMAT_LIST[x].bits == format) {
01208          index = x;
01209          break;
01210       }
01211    }
01212 
01213    if(index < 0)
01214       return -1;
01215 
01216    /* size validation */
01217    if(!framems)
01218       framems = AST_FORMAT_LIST[index].def_ms;
01219 
01220    if(AST_FORMAT_LIST[index].inc_ms && framems % AST_FORMAT_LIST[index].inc_ms) /* avoid division by zero */
01221       framems -= framems % AST_FORMAT_LIST[index].inc_ms;
01222 
01223    if(framems < AST_FORMAT_LIST[index].min_ms)
01224       framems = AST_FORMAT_LIST[index].min_ms;
01225 
01226    if(framems > AST_FORMAT_LIST[index].max_ms)
01227       framems = AST_FORMAT_LIST[index].max_ms;
01228 
01229 
01230    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
01231       if(pref->order[x] == (index + 1)) {
01232          pref->framing[x] = framems;
01233          break;
01234       }
01235    }
01236 
01237    return x;
01238 }

int ast_codec_pref_string ( struct ast_codec_pref pref,
char *  buf,
size_t  size 
)

Dump audio codec preference list into a string.

Definition at line 1064 of file frame.c.

References ast_codec_pref_index(), and ast_getformatname().

Referenced by dump_prefs(), and socket_process().

01065 {
01066    int x, codec; 
01067    size_t total_len, slen;
01068    char *formatname;
01069    
01070    memset(buf,0,size);
01071    total_len = size;
01072    buf[0] = '(';
01073    total_len--;
01074    for(x = 0; x < 32 ; x++) {
01075       if(total_len <= 0)
01076          break;
01077       if(!(codec = ast_codec_pref_index(pref,x)))
01078          break;
01079       if((formatname = ast_getformatname(codec))) {
01080          slen = strlen(formatname);
01081          if(slen > total_len)
01082             break;
01083          strncat(buf, formatname, total_len - 1); /* safe */
01084          total_len -= slen;
01085       }
01086       if(total_len && x < 31 && ast_codec_pref_index(pref , x + 1)) {
01087          strncat(buf, "|", total_len - 1); /* safe */
01088          total_len--;
01089       }
01090    }
01091    if(total_len) {
01092       strncat(buf, ")", total_len - 1); /* safe */
01093       total_len--;
01094    }
01095 
01096    return size - total_len;
01097 }

static force_inline int ast_format_rate ( int  format  )  [static]

Get the sample rate for a given format.

Definition at line 583 of file frame.h.

References AST_FORMAT_G722.

Referenced by ast_read_generator_actions(), ast_readaudio_callback(), ast_readvideo_callback(), ast_rtp_read(), ast_translate(), calc_cost(), and generator_force().

00584 {
00585    if (format == AST_FORMAT_G722)
00586       return 16000;
00587 
00588    return 8000;
00589 }

int ast_frame_adjust_volume ( struct ast_frame f,
int  adjustment 
)

Adjusts the volume of the audio samples contained in a frame.

Parameters:
f The frame containing the samples (must be AST_FRAME_VOICE and AST_FORMAT_SLINEAR)
adjustment The number of dB to adjust up or down.
Returns:
0 for success, non-zero for an error

Definition at line 1574 of file frame.c.

References AST_FORMAT_SLINEAR, AST_FRAME_VOICE, ast_slinear_saturated_divide(), ast_slinear_saturated_multiply(), ast_frame::data, ast_frame::frametype, ast_frame::samples, and ast_frame::subclass.

Referenced by audiohook_read_frame_single(), and conf_run().

01575 {
01576    int count;
01577    short *fdata = f->data;
01578    short adjust_value = abs(adjustment);
01579 
01580    if ((f->frametype != AST_FRAME_VOICE) || (f->subclass != AST_FORMAT_SLINEAR))
01581       return -1;
01582 
01583    if (!adjustment)
01584       return 0;
01585 
01586    for (count = 0; count < f->samples; count++) {
01587       if (adjustment > 0) {
01588          ast_slinear_saturated_multiply(&fdata[count], &adjust_value);
01589       } else if (adjustment < 0) {
01590          ast_slinear_saturated_divide(&fdata[count], &adjust_value);
01591       }
01592    }
01593 
01594    return 0;
01595 }

void ast_frame_dump ( const char *  name,
struct ast_frame f,
char *  prefix 
)

Dump a frame for debugging purposes

Definition at line 754 of file frame.c.

References AST_CONTROL_ANSWER, AST_CONTROL_BUSY, AST_CONTROL_CONGESTION, AST_CONTROL_FLASH, AST_CONTROL_HANGUP, AST_CONTROL_OFFHOOK, AST_CONTROL_OPTION, AST_CONTROL_RADIO_KEY, AST_CONTROL_RADIO_UNKEY, AST_CONTROL_RING, AST_CONTROL_RINGING, AST_CONTROL_TAKEOFFHOOK, AST_CONTROL_WINK, AST_FRAME_CONTROL, AST_FRAME_DTMF_BEGIN, AST_FRAME_DTMF_END, AST_FRAME_HTML, AST_FRAME_IAX, AST_FRAME_IMAGE, AST_FRAME_MODEM, AST_FRAME_NULL, AST_FRAME_TEXT, AST_FRAME_VIDEO, AST_FRAME_VOICE, ast_getformatname(), AST_HTML_BEGIN, AST_HTML_DATA, AST_HTML_END, AST_HTML_LDCOMPLETE, AST_HTML_LINKREJECT, AST_HTML_LINKURL, AST_HTML_NOSUPPORT, AST_HTML_UNLINK, AST_HTML_URL, AST_MODEM_T38, AST_MODEM_V150, ast_strlen_zero(), ast_verbose(), COLOR_BLACK, COLOR_BRCYAN, COLOR_BRGREEN, COLOR_BRMAGENTA, COLOR_BRRED, COLOR_YELLOW, ast_frame::data, ast_frame::frametype, ast_frame::subclass, and term_color().

Referenced by __ast_read(), and ast_write().

00755 {
00756    const char noname[] = "unknown";
00757    char ftype[40] = "Unknown Frametype";
00758    char cft[80];
00759    char subclass[40] = "Unknown Subclass";
00760    char csub[80];
00761    char moreinfo[40] = "";
00762    char cn[60];
00763    char cp[40];
00764    char cmn[40];
00765 
00766    if (!name)
00767       name = noname;
00768 
00769 
00770    if (!f) {
00771       ast_verbose("%s [ %s (NULL) ] [%s]\n", 
00772          term_color(cp, prefix, COLOR_BRMAGENTA, COLOR_BLACK, sizeof(cp)),
00773          term_color(cft, "HANGUP", COLOR_BRRED, COLOR_BLACK, sizeof(cft)), 
00774          term_color(cn, name, COLOR_YELLOW, COLOR_BLACK, sizeof(cn)));
00775       return;
00776    }
00777    /* XXX We should probably print one each of voice and video when the format changes XXX */
00778    if (f->frametype == AST_FRAME_VOICE)
00779       return;
00780    if (f->frametype == AST_FRAME_VIDEO)
00781       return;
00782    switch(f->frametype) {
00783    case AST_FRAME_DTMF_BEGIN:
00784       strcpy(ftype, "DTMF Begin");
00785       subclass[0] = f->subclass;
00786       subclass[1] = '\0';
00787       break;
00788    case AST_FRAME_DTMF_END:
00789       strcpy(ftype, "DTMF End");
00790       subclass[0] = f->subclass;
00791       subclass[1] = '\0';
00792       break;
00793    case AST_FRAME_CONTROL:
00794       strcpy(ftype, "Control");
00795       switch(f->subclass) {
00796       case AST_CONTROL_HANGUP:
00797          strcpy(subclass, "Hangup");
00798          break;
00799       case AST_CONTROL_RING:
00800          strcpy(subclass, "Ring");
00801          break;
00802       case AST_CONTROL_RINGING:
00803          strcpy(subclass, "Ringing");
00804          break;
00805       case AST_CONTROL_ANSWER:
00806          strcpy(subclass, "Answer");
00807          break;
00808       case AST_CONTROL_BUSY:
00809          strcpy(subclass, "Busy");
00810          break;
00811       case AST_CONTROL_TAKEOFFHOOK:
00812          strcpy(subclass, "Take Off Hook");
00813          break;
00814       case AST_CONTROL_OFFHOOK:
00815          strcpy(subclass, "Line Off Hook");
00816          break;
00817       case AST_CONTROL_CONGESTION:
00818          strcpy(subclass, "Congestion");
00819          break;
00820       case AST_CONTROL_FLASH:
00821          strcpy(subclass, "Flash");
00822          break;
00823       case AST_CONTROL_WINK:
00824          strcpy(subclass, "Wink");
00825          break;
00826       case AST_CONTROL_OPTION:
00827          strcpy(subclass, "Option");
00828          break;
00829       case AST_CONTROL_RADIO_KEY:
00830          strcpy(subclass, "Key Radio");
00831          break;
00832       case AST_CONTROL_RADIO_UNKEY:
00833          strcpy(subclass, "Unkey Radio");
00834          break;
00835       case -1:
00836          strcpy(subclass, "Stop generators");
00837          break;
00838       default:
00839          snprintf(subclass, sizeof(subclass), "Unknown control '%d'", f->subclass);
00840       }
00841       break;
00842    case AST_FRAME_NULL:
00843       strcpy(ftype, "Null Frame");
00844       strcpy(subclass, "N/A");
00845       break;
00846    case AST_FRAME_IAX:
00847       /* Should never happen */
00848       strcpy(ftype, "IAX Specific");
00849       snprintf(subclass, sizeof(subclass), "IAX Frametype %d", f->subclass);
00850       break;
00851    case AST_FRAME_TEXT:
00852       strcpy(ftype, "Text");
00853       strcpy(subclass, "N/A");
00854       ast_copy_string(moreinfo, f->data, sizeof(moreinfo));
00855       break;
00856    case AST_FRAME_IMAGE:
00857       strcpy(ftype, "Image");
00858       snprintf(subclass, sizeof(subclass), "Image format %s\n", ast_getformatname(f->subclass));
00859       break;
00860    case AST_FRAME_HTML:
00861       strcpy(ftype, "HTML");
00862       switch(f->subclass) {
00863       case AST_HTML_URL:
00864          strcpy(subclass, "URL");
00865          ast_copy_string(moreinfo, f->data, sizeof(moreinfo));
00866          break;
00867       case AST_HTML_DATA:
00868          strcpy(subclass, "Data");
00869          break;
00870       case AST_HTML_BEGIN:
00871          strcpy(subclass, "Begin");
00872          break;
00873       case AST_HTML_END:
00874          strcpy(subclass, "End");
00875          break;
00876       case AST_HTML_LDCOMPLETE:
00877          strcpy(subclass, "Load Complete");
00878          break;
00879       case AST_HTML_NOSUPPORT:
00880          strcpy(subclass, "No Support");
00881          break;
00882       case AST_HTML_LINKURL:
00883          strcpy(subclass, "Link URL");
00884          ast_copy_string(moreinfo, f->data, sizeof(moreinfo));
00885          break;
00886       case AST_HTML_UNLINK:
00887          strcpy(subclass, "Unlink");
00888          break;
00889       case AST_HTML_LINKREJECT:
00890          strcpy(subclass, "Link Reject");
00891          break;
00892       default:
00893          snprintf(subclass, sizeof(subclass), "Unknown HTML frame '%d'\n", f->subclass);
00894          break;
00895       }
00896       break;
00897    case AST_FRAME_MODEM:
00898       strcpy(ftype, "Modem");
00899       switch (f->subclass) {
00900       case AST_MODEM_T38:
00901          strcpy(subclass, "T.38");
00902          break;
00903       case AST_MODEM_V150:
00904          strcpy(subclass, "V.150");
00905          break;
00906       default:
00907          snprintf(subclass, sizeof(subclass), "Unknown MODEM frame '%d'\n", f->subclass);
00908          break;
00909       }
00910       break;
00911    default:
00912       snprintf(ftype, sizeof(ftype), "Unknown Frametype '%d'", f->frametype);
00913    }
00914    if (!ast_strlen_zero(moreinfo))
00915       ast_verbose("%s [ TYPE: %s (%d) SUBCLASS: %s (%d) '%s' ] [%s]\n",  
00916              term_color(cp, prefix, COLOR_BRMAGENTA, COLOR_BLACK, sizeof(cp)),
00917              term_color(cft, ftype, COLOR_BRRED, COLOR_BLACK, sizeof(cft)),
00918              f->frametype, 
00919              term_color(csub, subclass, COLOR_BRCYAN, COLOR_BLACK, sizeof(csub)),
00920              f->subclass, 
00921              term_color(cmn, moreinfo, COLOR_BRGREEN, COLOR_BLACK, sizeof(cmn)),
00922              term_color(cn, name, COLOR_YELLOW, COLOR_BLACK, sizeof(cn)));
00923    else
00924       ast_verbose("%s [ TYPE: %s (%d) SUBCLASS: %s (%d) ] [%s]\n",  
00925              term_color(cp, prefix, COLOR_BRMAGENTA, COLOR_BLACK, sizeof(cp)),
00926              term_color(cft, ftype, COLOR_BRRED, COLOR_BLACK, sizeof(cft)),
00927              f->frametype, 
00928              term_color(csub, subclass, COLOR_BRCYAN, COLOR_BLACK, sizeof(csub)),
00929              f->subclass, 
00930              term_color(cn, name, COLOR_YELLOW, COLOR_BLACK, sizeof(cn)));
00931 }

struct ast_frame* ast_frame_enqueue ( struct ast_frame head,
struct ast_frame f,
int  maxlen,
int  dupe 
) [read]

Appends a frame to the end of a list of frames, truncating the maximum length of the list.

void ast_frame_free ( struct ast_frame fr,
int  cache 
)

Requests a frame to be allocated.

Parameters:
source Request a frame be allocated. source is an optional source of the frame, len is the requested length, or "0" if the caller will supply the buffer
Frees a frame
Parameters:
fr Frame to free
cache Whether to consider this frame for frame caching

Definition at line 321 of file frame.c.

References ast_dsp_frame_freed(), AST_FRFLAG_FROM_DSP, AST_FRFLAG_FROM_TRANSLATOR, AST_LIST_INSERT_HEAD, AST_LIST_LOCK, AST_LIST_REMOVE, AST_LIST_UNLOCK, AST_MALLOCD_DATA, AST_MALLOCD_HDR, AST_MALLOCD_SRC, ast_test_flag, ast_translate_frame_freed(), ast_frame::data, FRAME_CACHE_MAX_SIZE, frames, free, ast_frame_cache::list, ast_frame::mallocd, ast_frame::offset, ast_frame_cache::size, and ast_frame::src.

Referenced by mixmonitor_thread().

00322 {
00323    if (ast_test_flag(fr, AST_FRFLAG_FROM_TRANSLATOR))
00324       ast_translate_frame_freed(fr);
00325    else if (ast_test_flag(fr, AST_FRFLAG_FROM_DSP))
00326       ast_dsp_frame_freed(fr);
00327 
00328    if (!fr->mallocd)
00329       return;
00330 
00331 #if !defined(LOW_MEMORY)
00332    if (cache && fr->mallocd == AST_MALLOCD_HDR) {
00333       /* Cool, only the header is malloc'd, let's just cache those for now 
00334        * to keep things simple... */
00335       struct ast_frame_cache *frames;
00336 
00337       if ((frames = ast_threadstorage_get(&frame_cache, sizeof(*frames))) 
00338           && frames->size < FRAME_CACHE_MAX_SIZE) {
00339          AST_LIST_INSERT_HEAD(&frames->list, fr, frame_list);
00340          frames->size++;
00341          return;
00342       }
00343    }
00344 #endif
00345    
00346    if (fr->mallocd & AST_MALLOCD_DATA) {
00347       if (fr->data) 
00348          free(fr->data - fr->offset);
00349    }
00350    if (fr->mallocd & AST_MALLOCD_SRC) {
00351       if (fr->src)
00352          free((char *)fr->src);
00353    }
00354    if (fr->mallocd & AST_MALLOCD_HDR) {
00355 #ifdef TRACE_FRAMES
00356       AST_LIST_LOCK(&headerlist);
00357       headers--;
00358       AST_LIST_REMOVE(&headerlist, fr, frame_list);
00359       AST_LIST_UNLOCK(&headerlist);
00360 #endif         
00361       free(fr);
00362    }
00363 }

int ast_frame_slinear_sum ( struct ast_frame f1,
struct ast_frame f2 
)

Sums two frames of audio samples.

Parameters:
f1 The first frame (which will contain the result)
f2 The second frame
Returns:
0 for success, non-zero for an error
The frames must be AST_FRAME_VOICE and must contain AST_FORMAT_SLINEAR samples, and must contain the same number of samples.

Definition at line 1597 of file frame.c.

References AST_FORMAT_SLINEAR, AST_FRAME_VOICE, ast_slinear_saturated_add(), ast_frame::data, ast_frame::frametype, ast_frame::samples, and ast_frame::subclass.

01598 {
01599    int count;
01600    short *data1, *data2;
01601 
01602    if ((f1->frametype != AST_FRAME_VOICE) || (f1->subclass != AST_FORMAT_SLINEAR))
01603       return -1;
01604 
01605    if ((f2->frametype != AST_FRAME_VOICE) || (f2->subclass != AST_FORMAT_SLINEAR))
01606       return -1;
01607 
01608    if (f1->samples != f2->samples)
01609       return -1;
01610 
01611    for (count = 0, data1 = f1->data, data2 = f2->data;
01612         count < f1->samples;
01613         count++, data1++, data2++)
01614       ast_slinear_saturated_add(data1, data2);
01615 
01616    return 0;
01617 }

struct ast_frame* ast_frdup ( const struct ast_frame fr  )  [read]

Copies a frame.

Parameters:
fr frame to copy Duplicates a frame -- should only rarely be used, typically frisolate is good enough
Returns:
Returns a frame on success, NULL on error

Definition at line 429 of file frame.c.

References ast_calloc_cache, ast_copy_flags, AST_FRFLAG_HAS_TIMING_INFO, AST_FRIENDLY_OFFSET, AST_LIST_REMOVE_CURRENT, AST_LIST_TRAVERSE_SAFE_BEGIN, AST_LIST_TRAVERSE_SAFE_END, AST_MALLOCD_HDR, ast_frame::data, ast_frame::datalen, ast_frame::delivery, frames, ast_frame::frametype, ast_frame::len, len, ast_frame_cache::list, ast_frame::mallocd, ast_frame::mallocd_hdr_len, ast_frame::offset, ast_frame::samples, ast_frame::seqno, ast_frame_cache::size, ast_frame::src, ast_frame::subclass, and ast_frame::ts.

Referenced by ast_jb_put(), ast_queue_frame(), ast_rtp_write(), ast_slinfactory_feed(), audiohook_read_frame_both(), audiohook_read_frame_single(), autoservice_run(), recordthread(), rpt(), and rpt_exec().

00430 {
00431    struct ast_frame *out = NULL;
00432    int len, srclen = 0;
00433    void *buf = NULL;
00434 
00435 #if !defined(LOW_MEMORY)
00436    struct ast_frame_cache *frames;
00437 #endif
00438 
00439    /* Start with standard stuff */
00440    len = sizeof(*out) + AST_FRIENDLY_OFFSET + f->datalen;
00441    /* If we have a source, add space for it */
00442    /*
00443     * XXX Watch out here - if we receive a src which is not terminated
00444     * properly, we can be easily attacked. Should limit the size we deal with.
00445     */
00446    if (f->src)
00447       srclen = strlen(f->src);
00448    if (srclen > 0)
00449       len += srclen + 1;
00450    
00451 #if !defined(LOW_MEMORY)
00452    if ((frames = ast_threadstorage_get(&frame_cache, sizeof(*frames)))) {
00453       AST_LIST_TRAVERSE_SAFE_BEGIN(&frames->list, out, frame_list) {
00454          if (out->mallocd_hdr_len >= len) {
00455             size_t mallocd_len = out->mallocd_hdr_len;
00456             AST_LIST_REMOVE_CURRENT(&frames->list, frame_list);
00457             memset(out, 0, sizeof(*out));
00458             out->mallocd_hdr_len = mallocd_len;
00459             buf = out;
00460             frames->size--;
00461             break;
00462          }
00463       }
00464       AST_LIST_TRAVERSE_SAFE_END
00465    }
00466 #endif
00467 
00468    if (!buf) {
00469       if (!(buf = ast_calloc_cache(1, len)))
00470          return NULL;
00471       out = buf;
00472       out->mallocd_hdr_len = len;
00473    }
00474 
00475    out->frametype = f->frametype;
00476    out->subclass = f->subclass;
00477    out->datalen = f->datalen;
00478    out->samples = f->samples;
00479    out->delivery = f->delivery;
00480    /* Set us as having malloc'd header only, so it will eventually
00481       get freed. */
00482    out->mallocd = AST_MALLOCD_HDR;
00483    out->offset = AST_FRIENDLY_OFFSET;
00484    if (out->datalen) {
00485       out->data = buf + sizeof(*out) + AST_FRIENDLY_OFFSET;
00486       memcpy(out->data, f->data, out->datalen); 
00487    }
00488    if (srclen > 0) {
00489       out->src = buf + sizeof(*out) + AST_FRIENDLY_OFFSET + f->datalen;
00490       /* Must have space since we allocated for it */
00491       strcpy((char *)out->src, f->src);
00492    }
00493    ast_copy_flags(out, f, AST_FRFLAG_HAS_TIMING_INFO);
00494    out->ts = f->ts;
00495    out->len = f->len;
00496    out->seqno = f->seqno;
00497    return out;
00498 }

struct ast_frame* ast_frisolate ( struct ast_frame fr  )  [read]

Makes a frame independent of any static storage.

Parameters:
fr frame to act upon Take a frame, and if it's not been malloc'd, make a malloc'd copy and if the data hasn't been malloced then make the data malloc'd. If you need to store frames, say for queueing, then you should call this function.
Returns:
Returns a frame on success, NULL on error

Definition at line 370 of file frame.c.

References ast_clear_flag, ast_copy_flags, ast_frame_header_new(), AST_FRFLAG_FROM_DSP, AST_FRFLAG_FROM_TRANSLATOR, AST_FRFLAG_HAS_TIMING_INFO, AST_FRIENDLY_OFFSET, ast_malloc, AST_MALLOCD_DATA, AST_MALLOCD_HDR, AST_MALLOCD_SRC, ast_strdup, ast_test_flag, ast_frame::data, ast_frame::datalen, ast_frame::frametype, free, ast_frame::len, ast_frame::mallocd, ast_frame::offset, ast_frame::samples, ast_frame::seqno, ast_frame::src, ast_frame::subclass, and ast_frame::ts.

Referenced by ast_rtp_read(), and jpeg_read_image().

00371 {
00372    struct ast_frame *out;
00373    void *newdata;
00374 
00375    ast_clear_flag(fr, AST_FRFLAG_FROM_TRANSLATOR);
00376    ast_clear_flag(fr, AST_FRFLAG_FROM_DSP);
00377 
00378    if (!(fr->mallocd & AST_MALLOCD_HDR)) {
00379       /* Allocate a new header if needed */
00380       if (!(out = ast_frame_header_new()))
00381          return NULL;
00382       out->frametype = fr->frametype;
00383       out->subclass = fr->subclass;
00384       out->datalen = fr->datalen;
00385       out->samples = fr->samples;
00386       out->offset = fr->offset;
00387       out->data = fr->data;
00388       /* Copy the timing data */
00389       ast_copy_flags(out, fr, AST_FRFLAG_HAS_TIMING_INFO);
00390       if (ast_test_flag(fr, AST_FRFLAG_HAS_TIMING_INFO)) {
00391          out->ts = fr->ts;
00392          out->len = fr->len;
00393          out->seqno = fr->seqno;
00394       }
00395    } else
00396       out = fr;
00397    
00398    if (!(fr->mallocd & AST_MALLOCD_SRC)) {
00399       if (fr->src) {
00400          if (!(out->src = ast_strdup(fr->src))) {
00401             if (out != fr)
00402                free(out);
00403             return NULL;
00404          }
00405       }
00406    } else
00407       out->src = fr->src;
00408    
00409    if (!(fr->mallocd & AST_MALLOCD_DATA))  {
00410       if (!(newdata = ast_malloc(fr->datalen + AST_FRIENDLY_OFFSET))) {
00411          if (out->src != fr->src)
00412             free((void *) out->src);
00413          if (out != fr)
00414             free(out);
00415          return NULL;
00416       }
00417       newdata += AST_FRIENDLY_OFFSET;
00418       out->offset = AST_FRIENDLY_OFFSET;
00419       out->datalen = fr->datalen;
00420       memcpy(newdata, fr->data, fr->datalen);
00421       out->data = newdata;
00422    }
00423 
00424    out->mallocd = AST_MALLOCD_HDR | AST_MALLOCD_SRC | AST_MALLOCD_DATA;
00425    
00426    return out;
00427 }

struct ast_format_list* ast_get_format_list ( size_t *  size  )  [read]

Definition at line 516 of file frame.c.

00517 {
00518    *size = (sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]));
00519    return AST_FORMAT_LIST;
00520 }

struct ast_format_list* ast_get_format_list_index ( int  index  )  [read]

Definition at line 511 of file frame.c.

00512 {
00513    return &AST_FORMAT_LIST[index];
00514 }

int ast_getformatbyname ( const char *  name  ) 

Gets a format from a name.

Parameters:
name string of format
Returns:
This returns the form of the format in binary on success, 0 on error.

Definition at line 582 of file frame.c.

References ast_expand_codec_alias(), ast_format_list::bits, and format.

Referenced by ast_parse_allow_disallow(), iax_template_parse(), load_moh_classes(), reload_config(), and try_suggested_sip_codec().

00583 {
00584    int x, all, format = 0;
00585 
00586    all = strcasecmp(name, "all") ? 0 : 1;
00587    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
00588       if(AST_FORMAT_LIST[x].visible && (all || 
00589            !strcasecmp(AST_FORMAT_LIST[x].name,name) ||
00590            !strcasecmp(AST_FORMAT_LIST[x].name,ast_expand_codec_alias(name)))) {
00591          format |= AST_FORMAT_LIST[x].bits;
00592          if(!all)
00593             break;
00594       }
00595    }
00596 
00597    return format;
00598 }

char* ast_getformatname ( int  format  ) 

Get the name of a format.

Parameters:
format id of format
Returns:
A static string containing the name of the format or "unknown" if unknown.

Definition at line 522 of file frame.c.

References ast_format_list::bits, ast_format_list::name, and ast_format_list::visible.

Referenced by __ast_play_and_record(), __ast_read(), __ast_register_translator(), __login_exec(), _sip_show_peer(), add_codec_to_answer(), add_codec_to_sdp(), agent_call(), ast_codec_get_len(), ast_codec_get_samples(), ast_codec_pref_string(), ast_dsp_process(), ast_frame_dump(), ast_openvstream(), ast_rtp_write(), ast_slinfactory_feed(), ast_streamfile(), ast_translator_build_path(), ast_unregister_translator(), ast_writestream(), background_detect_exec(), do_waiting(), eagi_exec(), func_channel_read(), function_iaxpeer(), function_sippeer(), gtalk_show_channels(), iax2_request(), iax2_show_channels(), iax2_show_peer(), iax_show_provisioning(), moh_classes_show(), moh_release(), oh323_rtp_read(), phone_setup(), print_codec_to_cli(), rebuild_matrix(), register_translator(), set_format(), set_peer_capabilities(), show_codecs(), show_codecs_deprecated(), show_file_formats(), show_file_formats_deprecated(), show_image_formats(), show_image_formats_deprecated(), show_translation(), show_translation_deprecated(), sip_request_call(), sip_rtp_read(), socket_process(), xagi_exec(), and zt_read().

00523 {
00524    int x;
00525    char *ret = "unknown";
00526    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
00527       if(AST_FORMAT_LIST[x].visible && AST_FORMAT_LIST[x].bits == format) {
00528          ret = AST_FORMAT_LIST[x].name;
00529          break;
00530       }
00531    }
00532    return ret;
00533 }

char* ast_getformatname_multiple ( char *  buf,
size_t  size,
int  format 
)

Get the names of a set of formats.

Parameters:
buf a buffer for the output string
size size of buf (bytes)
format the format (combined IDs of codecs) Prints a list of readable codec names corresponding to "format". ex: for format=AST_FORMAT_GSM|AST_FORMAT_SPEEX|AST_FORMAT_ILBC it will return "0x602 (GSM|SPEEX|ILBC)"
Returns:
The return value is buf.

Definition at line 535 of file frame.c.

References ast_format_list::bits, len, name, and ast_format_list::visible.

Referenced by __sip_show_channels(), _sip_show_peer(), add_sdp(), ast_streamfile(), function_iaxpeer(), function_sippeer(), gtalk_is_answered(), gtalk_newcall(), handle_showchan(), handle_showchan_deprecated(), iax2_bridge(), iax2_show_peer(), process_sdp(), serialize_showchan(), sip_new(), sip_request_call(), sip_show_channel(), sip_show_settings(), and sip_write().

00536 {
00537    int x;
00538    unsigned len;
00539    char *start, *end = buf;
00540 
00541    if (!size)
00542       return buf;
00543    snprintf(end, size, "0x%x (", format);
00544    len = strlen(end);
00545    end += len;
00546    size -= len;
00547    start = end;
00548    for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) {
00549       if (AST_FORMAT_LIST[x].visible && (AST_FORMAT_LIST[x].bits & format)) {
00550          snprintf(end, size,"%s|",AST_FORMAT_LIST[x].name);
00551          len = strlen(end);
00552          end += len;
00553          size -= len;
00554       }
00555    }
00556    if (start == end)
00557       snprintf(start, size, "nothing)");
00558    else if (size > 1)
00559       *(end -1) = ')';
00560    return buf;
00561 }

void ast_parse_allow_disallow ( struct ast_codec_pref pref,
int *  mask,
const char *  list,
int  allowing 
)

Parse an "allow" or "deny" line in a channel or device configuration and update the capabilities mask and pref if provided. Video codecs are not added to codec preference lists, since we can not transcode.

Definition at line 1303 of file frame.c.

References ast_codec_pref_append(), ast_codec_pref_remove(), ast_codec_pref_setsize(), AST_FORMAT_AUDIO_MASK, ast_getformatbyname(), ast_log(), ast_strdupa, format, LOG_DEBUG, LOG_WARNING, option_debug, parse(), and strsep().

Referenced by build_device(), build_peer(), build_user(), gtalk_create_member(), gtalk_load_config(), reload_config(), set_config(), and update_common_options().

01304 {
01305    char *parse = NULL, *this = NULL, *psize = NULL;
01306    int format = 0, framems = 0;
01307 
01308    parse = ast_strdupa(list);
01309    while ((this = strsep(&parse, ","))) {
01310       framems = 0;
01311       if ((psize = strrchr(this, ':'))) {
01312          *psize++ = '\0';
01313          if (option_debug)
01314             ast_log(LOG_DEBUG,"Packetization for codec: %s is %s\n", this, psize);
01315          framems = atoi(psize);
01316          if (framems < 0)
01317             framems = 0;
01318       }
01319       if (!(format = ast_getformatbyname(this))) {
01320          ast_log(LOG_WARNING, "Cannot %s unknown format '%s'\n", allowing ? "allow" : "disallow", this);
01321          continue;
01322       }
01323 
01324       if (mask) {
01325          if (allowing)
01326             *mask |= format;
01327          else
01328             *mask &= ~format;
01329       }
01330 
01331       /* Set up a preference list for audio. Do not include video in preferences 
01332          since we can not transcode video and have to use whatever is offered
01333        */
01334       if (pref && (format & AST_FORMAT_AUDIO_MASK)) {
01335          if (strcasecmp(this, "all")) {
01336             if (allowing) {
01337                ast_codec_pref_append(pref, format);
01338                ast_codec_pref_setsize(pref, format, framems);
01339             }
01340             else
01341                ast_codec_pref_remove(pref, format);
01342          } else if (!allowing) {
01343             memset(pref, 0, sizeof(*pref));
01344          }
01345       }
01346    }
01347 }

void ast_smoother_free ( struct ast_smoother s  ) 

Definition at line 268 of file frame.c.

References free.

Referenced by ast_rtp_codec_setpref(), ast_rtp_destroy(), and ast_rtp_write().

00269 {
00270    free(s);
00271 }

int ast_smoother_get_flags ( struct ast_smoother smoother  ) 

Definition at line 157 of file frame.c.

References ast_smoother::flags.

00158 {
00159    return s->flags;
00160 }

struct ast_smoother* ast_smoother_new ( int  bytes  )  [read]

Definition at line 147 of file frame.c.

References ast_malloc, ast_smoother_reset(), and s.

Referenced by ast_rtp_write().

00148 {
00149    struct ast_smoother *s;
00150    if (size < 1)
00151       return NULL;
00152    if ((s = ast_malloc(sizeof(*s))))
00153       ast_smoother_reset(s, size);
00154    return s;
00155 }

struct ast_frame* ast_smoother_read ( struct ast_smoother s  )  [read]

Definition at line 218 of file frame.c.

References AST_FRAME_VOICE, AST_FRIENDLY_OFFSET, ast_log(), AST_SMOOTHER_FLAG_G729, ast_tvadd(), ast_smoother::data, ast_frame::data, ast_frame::datalen, ast_smoother::delivery, ast_frame::delivery, ast_smoother::f, ast_smoother::flags, ast_smoother::format, ast_smoother::framedata, ast_frame::frametype, ast_smoother::len, len, LOG_WARNING, ast_frame::offset, ast_smoother::opt, ast_frame::samples, ast_smoother::samplesperbyte, ast_smoother::size, and ast_frame::subclass.

Referenced by ast_rtp_write().

00219 {
00220    struct ast_frame *opt;
00221    int len;
00222 
00223    /* IF we have an optimization frame, send it */
00224    if (s->opt) {
00225       if (s->opt->offset < AST_FRIENDLY_OFFSET)
00226          ast_log(LOG_WARNING, "Returning a frame of inappropriate offset (%d).\n",
00227                      s->opt->offset);
00228       opt = s->opt;
00229       s->opt = NULL;
00230       return opt;
00231    }
00232 
00233    /* Make sure we have enough data */
00234    if (s->len < s->size) {
00235       /* Or, if this is a G.729 frame with VAD on it, send it immediately anyway */
00236       if (!((s->flags & AST_SMOOTHER_FLAG_G729) && (s->size % 10)))
00237          return NULL;
00238    }
00239    len = s->size;
00240    if (len > s->len)
00241       len = s->len;
00242    /* Make frame */
00243    s->f.frametype = AST_FRAME_VOICE;
00244    s->f.subclass = s->format;
00245    s->f.data = s->framedata + AST_FRIENDLY_OFFSET;
00246    s->f.offset = AST_FRIENDLY_OFFSET;
00247    s->f.datalen = len;
00248    /* Samples will be improper given VAD, but with VAD the concept really doesn't even exist */
00249    s->f.samples = len * s->samplesperbyte;   /* XXX rounding */
00250    s->f.delivery = s->delivery;
00251    /* Fill Data */
00252    memcpy(s->f.data, s->data, len);
00253    s->len -= len;
00254    /* Move remaining data to the front if applicable */
00255    if (s->len) {
00256       /* In principle this should all be fine because if we are sending
00257          G.729 VAD, the next timestamp will take over anyawy */
00258       memmove(s->data, s->data + len, s->len);
00259       if (!ast_tvzero(s->delivery)) {
00260          /* If we have delivery time, increment it, otherwise, leave it at 0 */
00261          s->delivery = ast_tvadd(s->delivery, ast_samp2tv(s->f.samples, 8000));
00262       }
00263    }
00264    /* Return frame */
00265    return &s->f;
00266 }

void ast_smoother_reset ( struct ast_smoother s,
int  bytes 
)

Definition at line 141 of file frame.c.

References ast_smoother::size.

Referenced by ast_smoother_new().

00142 {
00143    memset(s, 0, sizeof(*s));
00144    s->size = size;
00145 }

void ast_smoother_set_flags ( struct ast_smoother smoother,
int  flags 
)

Definition at line 162 of file frame.c.

References ast_smoother::flags.

Referenced by ast_rtp_write().

00163 {
00164    s->flags = flags;
00165 }

int ast_smoother_test_flag ( struct ast_smoother s,
int  flag 
)

Definition at line 167 of file frame.c.

References ast_smoother::flags.

Referenced by ast_rtp_write().

00168 {
00169    return (s->flags & flag);
00170 }

void ast_swapcopy_samples ( void *  dst,
const void *  src,
int  samples 
)

Definition at line 500 of file frame.c.

Referenced by __ast_smoother_feed(), iax_frame_wrap(), and phone_write_buf().

00501 {
00502    int i;
00503    unsigned short *dst_s = dst;
00504    const unsigned short *src_s = src;
00505 
00506    for (i = 0; i < samples; i++)
00507       dst_s[i] = (src_s[i]<<8) | (src_s[i]>>8);
00508 }


Variable Documentation


Generated on Sun Jun 12 16:37:58 2011 for Asterisk - the Open Source PBX by  doxygen 1.5.6