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asterisk/main/frame.c
George Joseph 4fb7967c73 bridge_softmix: Forward TEXT frames 
Core bridging and, more specifically, bridge_softmix have been
enhanced to relay received frames of type TEXT or TEXT_DATA to all
participants in a softmix bridge.  res_pjsip_messaging and
chan_pjsip have been enhanced to take advantage of this so when
res_pjsip_messaging receives an in-dialog MESSAGE message from a
user in a conference call, it's relayed to all other participants
in the call.

res_pjsip_messaging already queues TEXT frames to the channel when
it receives an in-dialog MESSAGE from an endpoint and chan_pjsip
will send an MESSAGE when it gets a TEXT frame.  On a normal
point-to-point call, the frames are forwarded between the two
correctly.  bridge_softmix was not though so messages weren't
getting forwarded to conference bridge participants.  Even if they
were, the bridging code had no way to tell the participants who
sent the message so it would look like it came from the bridge
itself.

* The TEXT frame type doesn't allow storage of any meta data, such
as sender, on the frame so a new TEXT_DATA frame type was added that
uses the new ast_msg_data structure as its payload.  A channel
driver can queue a frame of that type when it receives a message
from outside.  A channel driver can use it for sending messages
by implementing the new send_text_data channel tech callback and
setting the new AST_CHAN_TP_SEND_TEXT_DATA flag in its tech
properties.  If set, the bridging/channel core will use it instead
of the original send_text callback and it will get the ast_msg_data
structure. Channel drivers aren't required to implement this.  Even
if a TEXT_DATA enabled driver uses it for incoming messages, an
outgoing channel driver that doesn't will still have it's send_text
callback called with only the message text just as before.

* res_pjsip_messaging now creates a TEXT_DATA frame for incoming
in-dialog messages and sets the "from" to the display name in the
"From" header, or if that's empty, the caller id name from the
channel.  This allows the chat client user to set a friendly name
for the chat.

* bridge_softmix now forwards TEXT and TEXT_DATA frames to all
participants (except the sender).

* A new function "ast_sendtext_data" was added to channel which
takes an ast_msg_data structure and calls a channel's
send_text_data callback, or if that's not defined, the original
send_text callback.

* bridge_channel now calls ast_sendtext_data for TEXT_DATA frame
types and ast_sendtext for TEXT frame types.

* chan_pjsip now uses the "from" name in the ast_msg_data structure
(if it exists) to set the "From" header display name on outgoing text
messages.

Change-Id: Idacf5900bfd5f22ab8cd235aa56dfad090d18489
2018-04-17 10:30:23 -06:00

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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2005, Digium, Inc.
*
* Mark Spencer <markster@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief Frame and codec manipulation routines
*
* \author Mark Spencer <markster@digium.com>
*/
/*** MODULEINFO
<support_level>core</support_level>
***/
#include "asterisk.h"
#include "asterisk/_private.h"
#include "asterisk/lock.h"
#include "asterisk/frame.h"
#include "asterisk/format_cache.h"
#include "asterisk/channel.h"
#include "asterisk/cli.h"
#include "asterisk/term.h"
#include "asterisk/utils.h"
#include "asterisk/threadstorage.h"
#include "asterisk/linkedlists.h"
#include "asterisk/translate.h"
#include "asterisk/dsp.h"
#include "asterisk/file.h"
#if !defined(LOW_MEMORY)
static void frame_cache_cleanup(void *data);
/*! \brief A per-thread cache of frame headers */
AST_THREADSTORAGE_CUSTOM(frame_cache, NULL, frame_cache_cleanup);
/*!
* \brief Maximum ast_frame cache size
*
* In most cases where the frame header cache will be useful, the size
* of the cache will stay very small. However, it is not always the case that
* the same thread that allocates the frame will be the one freeing them, so
* sometimes a thread will never have any frames in its cache, or the cache
* will never be pulled from. For the latter case, we limit the maximum size.
*/
#define FRAME_CACHE_MAX_SIZE 10
/*! \brief This is just so ast_frames, a list head struct for holding a list of
* ast_frame structures, is defined. */
AST_LIST_HEAD_NOLOCK(ast_frames, ast_frame);
struct ast_frame_cache {
struct ast_frames list;
size_t size;
};
#endif
struct ast_frame ast_null_frame = { AST_FRAME_NULL, };
static struct ast_frame *ast_frame_header_new(void)
{
struct ast_frame *f;
#if !defined(LOW_MEMORY)
struct ast_frame_cache *frames;
if ((frames = ast_threadstorage_get(&frame_cache, sizeof(*frames)))) {
if ((f = AST_LIST_REMOVE_HEAD(&frames->list, frame_list))) {
size_t mallocd_len = f->mallocd_hdr_len;
memset(f, 0, sizeof(*f));
f->mallocd_hdr_len = mallocd_len;
frames->size--;
return f;
}
}
if (!(f = ast_calloc_cache(1, sizeof(*f))))
return NULL;
#else
if (!(f = ast_calloc(1, sizeof(*f))))
return NULL;
#endif
f->mallocd_hdr_len = sizeof(*f);
return f;
}
#if !defined(LOW_MEMORY)
static void frame_cache_cleanup(void *data)
{
struct ast_frame_cache *frames = data;
struct ast_frame *f;
while ((f = AST_LIST_REMOVE_HEAD(&frames->list, frame_list)))
ast_free(f);
ast_free(frames);
}
#endif
static void __frame_free(struct ast_frame *fr, int cache)
{
if (!fr->mallocd)
return;
#if !defined(LOW_MEMORY)
if (fr->mallocd == AST_MALLOCD_HDR
&& cache
&& ast_opt_cache_media_frames) {
/* Cool, only the header is malloc'd, let's just cache those for now
* to keep things simple... */
struct ast_frame_cache *frames;
frames = ast_threadstorage_get(&frame_cache, sizeof(*frames));
if (frames && frames->size < FRAME_CACHE_MAX_SIZE) {
if (fr->frametype == AST_FRAME_VOICE
|| fr->frametype == AST_FRAME_VIDEO
|| fr->frametype == AST_FRAME_IMAGE) {
ao2_cleanup(fr->subclass.format);
}
AST_LIST_INSERT_HEAD(&frames->list, fr, frame_list);
frames->size++;
return;
}
}
#endif
if (fr->mallocd & AST_MALLOCD_DATA) {
if (fr->data.ptr) {
ast_free(fr->data.ptr - fr->offset);
}
}
if (fr->mallocd & AST_MALLOCD_SRC) {
ast_free((void *) fr->src);
}
if (fr->mallocd & AST_MALLOCD_HDR) {
if (fr->frametype == AST_FRAME_VOICE
|| fr->frametype == AST_FRAME_VIDEO
|| fr->frametype == AST_FRAME_IMAGE) {
ao2_cleanup(fr->subclass.format);
}
ast_free(fr);
} else {
fr->mallocd = 0;
}
}
void ast_frame_free(struct ast_frame *frame, int cache)
{
struct ast_frame *next;
while (frame) {
next = AST_LIST_NEXT(frame, frame_list);
__frame_free(frame, cache);
frame = next;
}
}
void ast_frame_dtor(struct ast_frame *f)
{
ast_frfree(f);
}
/*!
* \brief 'isolates' a frame by duplicating non-malloc'ed components
* (header, src, data).
* On return all components are malloc'ed
*/
struct ast_frame *ast_frisolate(struct ast_frame *fr)
{
struct ast_frame *out;
void *newdata;
/* if none of the existing frame is malloc'd, let ast_frdup() do it
since it is more efficient
*/
if (fr->mallocd == 0) {
return ast_frdup(fr);
}
/* if everything is already malloc'd, we are done */
if ((fr->mallocd & (AST_MALLOCD_HDR | AST_MALLOCD_SRC | AST_MALLOCD_DATA)) ==
(AST_MALLOCD_HDR | AST_MALLOCD_SRC | AST_MALLOCD_DATA)) {
return fr;
}
if (!(fr->mallocd & AST_MALLOCD_HDR)) {
/* Allocate a new header if needed */
if (!(out = ast_frame_header_new())) {
return NULL;
}
out->frametype = fr->frametype;
out->subclass = fr->subclass;
if ((fr->frametype == AST_FRAME_VOICE) || (fr->frametype == AST_FRAME_VIDEO) ||
(fr->frametype == AST_FRAME_IMAGE)) {
ao2_bump(out->subclass.format);
}
out->datalen = fr->datalen;
out->samples = fr->samples;
out->mallocd = AST_MALLOCD_HDR;
out->offset = fr->offset;
/* Copy the timing data */
ast_copy_flags(out, fr, AST_FLAGS_ALL);
if (ast_test_flag(fr, AST_FRFLAG_HAS_TIMING_INFO)) {
out->ts = fr->ts;
out->len = fr->len;
out->seqno = fr->seqno;
}
out->stream_num = fr->stream_num;
} else {
out = fr;
}
if (fr->src) {
/* The original frame has a source string */
if (!(fr->mallocd & AST_MALLOCD_SRC)) {
/*
* The original frame has a non-malloced source string.
*
* Duplicate the string and put it into the isolated frame
* which may also be the original frame.
*/
newdata = ast_strdup(fr->src);
if (!newdata) {
if (out != fr) {
ast_frame_free(out, 0);
}
return NULL;
}
out->src = newdata;
out->mallocd |= AST_MALLOCD_SRC;
} else if (out != fr) {
/* Steal the source string from the original frame. */
out->src = fr->src;
fr->src = NULL;
fr->mallocd &= ~AST_MALLOCD_SRC;
out->mallocd |= AST_MALLOCD_SRC;
}
}
if (!(fr->mallocd & AST_MALLOCD_DATA)) {
/* The original frame has a non-malloced data buffer. */
if (!fr->datalen) {
/* Actually it's just an int so we can simply copy it. */
out->data.uint32 = fr->data.uint32;
return out;
}
/*
* Duplicate the data buffer and put it into the isolated frame
* which may also be the original frame.
*/
newdata = ast_malloc(fr->datalen + AST_FRIENDLY_OFFSET);
if (!newdata) {
if (out != fr) {
ast_frame_free(out, 0);
}
return NULL;
}
newdata += AST_FRIENDLY_OFFSET;
out->offset = AST_FRIENDLY_OFFSET;
memcpy(newdata, fr->data.ptr, fr->datalen);
out->data.ptr = newdata;
out->mallocd |= AST_MALLOCD_DATA;
} else if (out != fr) {
/* Steal the data buffer from the original frame. */
out->data = fr->data;
memset(&fr->data, 0, sizeof(fr->data));
fr->mallocd &= ~AST_MALLOCD_DATA;
out->mallocd |= AST_MALLOCD_DATA;
}
return out;
}
struct ast_frame *ast_frdup(const struct ast_frame *f)
{
struct ast_frame *out = NULL;
int len, srclen = 0;
void *buf = NULL;
#if !defined(LOW_MEMORY)
struct ast_frame_cache *frames;
#endif
/* Start with standard stuff */
len = sizeof(*out) + AST_FRIENDLY_OFFSET + f->datalen;
/* If we have a source, add space for it */
/*
* XXX Watch out here - if we receive a src which is not terminated
* properly, we can be easily attacked. Should limit the size we deal with.
*/
if (f->src)
srclen = strlen(f->src);
if (srclen > 0)
len += srclen + 1;
#if !defined(LOW_MEMORY)
if ((frames = ast_threadstorage_get(&frame_cache, sizeof(*frames)))) {
AST_LIST_TRAVERSE_SAFE_BEGIN(&frames->list, out, frame_list) {
if (out->mallocd_hdr_len >= len) {
size_t mallocd_len = out->mallocd_hdr_len;
AST_LIST_REMOVE_CURRENT(frame_list);
memset(out, 0, sizeof(*out));
out->mallocd_hdr_len = mallocd_len;
buf = out;
frames->size--;
break;
}
}
AST_LIST_TRAVERSE_SAFE_END;
}
#endif
if (!buf) {
if (!(buf = ast_calloc_cache(1, len)))
return NULL;
out = buf;
out->mallocd_hdr_len = len;
}
out->frametype = f->frametype;
out->subclass = f->subclass;
if ((f->frametype == AST_FRAME_VOICE) || (f->frametype == AST_FRAME_VIDEO) ||
(f->frametype == AST_FRAME_IMAGE)) {
ao2_bump(out->subclass.format);
}
out->datalen = f->datalen;
out->samples = f->samples;
out->delivery = f->delivery;
/* Even though this new frame was allocated from the heap, we can't mark it
* with AST_MALLOCD_HDR, AST_MALLOCD_DATA and AST_MALLOCD_SRC, because that
* would cause ast_frfree() to attempt to individually free each of those
* under the assumption that they were separately allocated. Since this frame
* was allocated in a single allocation, we'll only mark it as if the header
* was heap-allocated; this will result in the entire frame being properly freed.
*/
out->mallocd = AST_MALLOCD_HDR;
out->offset = AST_FRIENDLY_OFFSET;
if (out->datalen) {
out->data.ptr = buf + sizeof(*out) + AST_FRIENDLY_OFFSET;
memcpy(out->data.ptr, f->data.ptr, out->datalen);
} else {
out->data.uint32 = f->data.uint32;
}
if (srclen > 0) {
/* This may seem a little strange, but it's to avoid a gcc (4.2.4) compiler warning */
char *src;
out->src = buf + sizeof(*out) + AST_FRIENDLY_OFFSET + f->datalen;
src = (char *) out->src;
/* Must have space since we allocated for it */
strcpy(src, f->src);
}
ast_copy_flags(out, f, AST_FLAGS_ALL);
out->ts = f->ts;
out->len = f->len;
out->seqno = f->seqno;
out->stream_num = f->stream_num;
return out;
}
void ast_swapcopy_samples(void *dst, const void *src, int samples)
{
int i;
unsigned short *dst_s = dst;
const unsigned short *src_s = src;
for (i = 0; i < samples; i++)
dst_s[i] = (src_s[i]<<8) | (src_s[i]>>8);
}
void ast_frame_subclass2str(struct ast_frame *f, char *subclass, size_t slen, char *moreinfo, size_t mlen)
{
switch(f->frametype) {
case AST_FRAME_DTMF_BEGIN:
if (slen > 1) {
subclass[0] = f->subclass.integer;
subclass[1] = '\0';
}
break;
case AST_FRAME_DTMF_END:
if (slen > 1) {
subclass[0] = f->subclass.integer;
subclass[1] = '\0';
}
break;
case AST_FRAME_CONTROL:
switch (f->subclass.integer) {
case AST_CONTROL_HANGUP:
ast_copy_string(subclass, "Hangup", slen);
break;
case AST_CONTROL_RING:
ast_copy_string(subclass, "Ring", slen);
break;
case AST_CONTROL_RINGING:
ast_copy_string(subclass, "Ringing", slen);
break;
case AST_CONTROL_ANSWER:
ast_copy_string(subclass, "Answer", slen);
break;
case AST_CONTROL_BUSY:
ast_copy_string(subclass, "Busy", slen);
break;
case AST_CONTROL_TAKEOFFHOOK:
ast_copy_string(subclass, "Take Off Hook", slen);
break;
case AST_CONTROL_OFFHOOK:
ast_copy_string(subclass, "Line Off Hook", slen);
break;
case AST_CONTROL_CONGESTION:
ast_copy_string(subclass, "Congestion", slen);
break;
case AST_CONTROL_FLASH:
ast_copy_string(subclass, "Flash", slen);
break;
case AST_CONTROL_WINK:
ast_copy_string(subclass, "Wink", slen);
break;
case AST_CONTROL_OPTION:
ast_copy_string(subclass, "Option", slen);
break;
case AST_CONTROL_RADIO_KEY:
ast_copy_string(subclass, "Key Radio", slen);
break;
case AST_CONTROL_RADIO_UNKEY:
ast_copy_string(subclass, "Unkey Radio", slen);
break;
case AST_CONTROL_HOLD:
ast_copy_string(subclass, "Hold", slen);
break;
case AST_CONTROL_UNHOLD:
ast_copy_string(subclass, "Unhold", slen);
break;
case AST_CONTROL_T38_PARAMETERS: {
char *message = "Unknown";
if (f->datalen != sizeof(struct ast_control_t38_parameters)) {
message = "Invalid";
} else {
struct ast_control_t38_parameters *parameters = f->data.ptr;
enum ast_control_t38 state = parameters->request_response;
if (state == AST_T38_REQUEST_NEGOTIATE)
message = "Negotiation Requested";
else if (state == AST_T38_REQUEST_TERMINATE)
message = "Negotiation Request Terminated";
else if (state == AST_T38_NEGOTIATED)
message = "Negotiated";
else if (state == AST_T38_TERMINATED)
message = "Terminated";
else if (state == AST_T38_REFUSED)
message = "Refused";
}
snprintf(subclass, slen, "T38_Parameters/%s", message);
break;
}
case -1:
ast_copy_string(subclass, "Stop generators", slen);
break;
default:
snprintf(subclass, slen, "Unknown control '%d'", f->subclass.integer);
}
break;
case AST_FRAME_NULL:
ast_copy_string(subclass, "N/A", slen);
break;
case AST_FRAME_IAX:
/* Should never happen */
snprintf(subclass, slen, "IAX Frametype %d", f->subclass.integer);
break;
case AST_FRAME_BRIDGE_ACTION:
/* Should never happen */
snprintf(subclass, slen, "Bridge Frametype %d", f->subclass.integer);
break;
case AST_FRAME_BRIDGE_ACTION_SYNC:
/* Should never happen */
snprintf(subclass, slen, "Synchronous Bridge Frametype %d", f->subclass.integer);
break;
case AST_FRAME_TEXT:
ast_copy_string(subclass, "N/A", slen);
if (moreinfo) {
ast_copy_string(moreinfo, f->data.ptr, mlen);
}
break;
case AST_FRAME_IMAGE:
snprintf(subclass, slen, "Image format %s\n", ast_format_get_name(f->subclass.format));
break;
case AST_FRAME_HTML:
switch (f->subclass.integer) {
case AST_HTML_URL:
ast_copy_string(subclass, "URL", slen);
if (moreinfo) {
ast_copy_string(moreinfo, f->data.ptr, mlen);
}
break;
case AST_HTML_DATA:
ast_copy_string(subclass, "Data", slen);
break;
case AST_HTML_BEGIN:
ast_copy_string(subclass, "Begin", slen);
break;
case AST_HTML_END:
ast_copy_string(subclass, "End", slen);
break;
case AST_HTML_LDCOMPLETE:
ast_copy_string(subclass, "Load Complete", slen);
break;
case AST_HTML_NOSUPPORT:
ast_copy_string(subclass, "No Support", slen);
break;
case AST_HTML_LINKURL:
ast_copy_string(subclass, "Link URL", slen);
if (moreinfo) {
ast_copy_string(moreinfo, f->data.ptr, mlen);
}
break;
case AST_HTML_UNLINK:
ast_copy_string(subclass, "Unlink", slen);
break;
case AST_HTML_LINKREJECT:
ast_copy_string(subclass, "Link Reject", slen);
break;
default:
snprintf(subclass, slen, "Unknown HTML frame '%d'\n", f->subclass.integer);
break;
}
break;
case AST_FRAME_MODEM:
switch (f->subclass.integer) {
case AST_MODEM_T38:
ast_copy_string(subclass, "T.38", slen);
break;
case AST_MODEM_V150:
ast_copy_string(subclass, "V.150", slen);
break;
default:
snprintf(subclass, slen, "Unknown MODEM frame '%d'\n", f->subclass.integer);
break;
}
break;
case AST_FRAME_RTCP:
ast_copy_string(subclass, "RTCP", slen);
default:
ast_copy_string(subclass, "Unknown Subclass", slen);
break;
}
}
void ast_frame_type2str(enum ast_frame_type frame_type, char *ftype, size_t len)
{
switch (frame_type) {
case AST_FRAME_DTMF_BEGIN:
ast_copy_string(ftype, "DTMF Begin", len);
break;
case AST_FRAME_DTMF_END:
ast_copy_string(ftype, "DTMF End", len);
break;
case AST_FRAME_CONTROL:
ast_copy_string(ftype, "Control", len);
break;
case AST_FRAME_NULL:
ast_copy_string(ftype, "Null Frame", len);
break;
case AST_FRAME_IAX:
/* Should never happen */
ast_copy_string(ftype, "IAX Specific", len);
break;
case AST_FRAME_BRIDGE_ACTION:
/* Should never happen */
ast_copy_string(ftype, "Bridge Specific", len);
break;
case AST_FRAME_BRIDGE_ACTION_SYNC:
/* Should never happen */
ast_copy_string(ftype, "Bridge Specific", len);
break;
case AST_FRAME_TEXT:
ast_copy_string(ftype, "Text", len);
break;
case AST_FRAME_TEXT_DATA:
ast_copy_string(ftype, "Text Data", len);
break;
case AST_FRAME_IMAGE:
ast_copy_string(ftype, "Image", len);
break;
case AST_FRAME_HTML:
ast_copy_string(ftype, "HTML", len);
break;
case AST_FRAME_MODEM:
ast_copy_string(ftype, "Modem", len);
break;
case AST_FRAME_VOICE:
ast_copy_string(ftype, "Voice", len);
break;
case AST_FRAME_VIDEO:
ast_copy_string(ftype, "Video", len);
break;
case AST_FRAME_RTCP:
ast_copy_string(ftype, "RTCP", len);
break;
default:
snprintf(ftype, len, "Unknown Frametype '%u'", frame_type);
break;
}
}
/*! Dump a frame for debugging purposes */
void ast_frame_dump(const char *name, struct ast_frame *f, char *prefix)
{
const char noname[] = "unknown";
char ftype[40] = "Unknown Frametype";
char cft[80];
char subclass[40] = "Unknown Subclass";
char csub[80];
char moreinfo[40] = "";
char cn[60];
char cp[40];
char cmn[40];
if (!name) {
name = noname;
}
if (!f) {
ast_verb(-1, "%s [ %s (NULL) ] [%s]\n",
term_color(cp, prefix, COLOR_BRMAGENTA, COLOR_BLACK, sizeof(cp)),
term_color(cft, "HANGUP", COLOR_BRRED, COLOR_BLACK, sizeof(cft)),
term_color(cn, name, COLOR_YELLOW, COLOR_BLACK, sizeof(cn)));
return;
}
/* XXX We should probably print one each of voice and video when the format changes XXX */
if (f->frametype == AST_FRAME_VOICE) {
return;
}
if (f->frametype == AST_FRAME_VIDEO) {
return;
}
if (f->frametype == AST_FRAME_RTCP) {
return;
}
ast_frame_type2str(f->frametype, ftype, sizeof(ftype));
ast_frame_subclass2str(f, subclass, sizeof(subclass), moreinfo, sizeof(moreinfo));
if (!ast_strlen_zero(moreinfo))
ast_verb(-1, "%s [ TYPE: %s (%u) SUBCLASS: %s (%d) '%s' ] [%s]\n",
term_color(cp, prefix, COLOR_BRMAGENTA, COLOR_BLACK, sizeof(cp)),
term_color(cft, ftype, COLOR_BRRED, COLOR_BLACK, sizeof(cft)),
f->frametype,
term_color(csub, subclass, COLOR_BRCYAN, COLOR_BLACK, sizeof(csub)),
f->subclass.integer,
term_color(cmn, moreinfo, COLOR_BRGREEN, COLOR_BLACK, sizeof(cmn)),
term_color(cn, name, COLOR_YELLOW, COLOR_BLACK, sizeof(cn)));
else
ast_verb(-1, "%s [ TYPE: %s (%u) SUBCLASS: %s (%d) ] [%s]\n",
term_color(cp, prefix, COLOR_BRMAGENTA, COLOR_BLACK, sizeof(cp)),
term_color(cft, ftype, COLOR_BRRED, COLOR_BLACK, sizeof(cft)),
f->frametype,
term_color(csub, subclass, COLOR_BRCYAN, COLOR_BLACK, sizeof(csub)),
f->subclass.integer,
term_color(cn, name, COLOR_YELLOW, COLOR_BLACK, sizeof(cn)));
}
int ast_frame_adjust_volume(struct ast_frame *f, int adjustment)
{
int count;
short *fdata = f->data.ptr;
short adjust_value = abs(adjustment);
if ((f->frametype != AST_FRAME_VOICE) || !(ast_format_cache_is_slinear(f->subclass.format))) {
return -1;
}
if (!adjustment) {
return 0;
}
for (count = 0; count < f->samples; count++) {
if (adjustment > 0) {
ast_slinear_saturated_multiply(&fdata[count], &adjust_value);
} else if (adjustment < 0) {
ast_slinear_saturated_divide(&fdata[count], &adjust_value);
}
}
return 0;
}
int ast_frame_slinear_sum(struct ast_frame *f1, struct ast_frame *f2)
{
int count;
short *data1, *data2;
if ((f1->frametype != AST_FRAME_VOICE) || (ast_format_cmp(f1->subclass.format, ast_format_slin) != AST_FORMAT_CMP_NOT_EQUAL))
return -1;
if ((f2->frametype != AST_FRAME_VOICE) || (ast_format_cmp(f2->subclass.format, ast_format_slin) != AST_FORMAT_CMP_NOT_EQUAL))
return -1;
if (f1->samples != f2->samples)
return -1;
for (count = 0, data1 = f1->data.ptr, data2 = f2->data.ptr;
count < f1->samples;
count++, data1++, data2++)
ast_slinear_saturated_add(data1, data2);
return 0;
}
int ast_frame_clear(struct ast_frame *frame)
{
struct ast_frame *next;
for (next = AST_LIST_NEXT(frame, frame_list);
frame;
frame = next, next = frame ? AST_LIST_NEXT(frame, frame_list) : NULL) {
memset(frame->data.ptr, 0, frame->datalen);
}
return 0;
}
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