This change introduces an ast_read_stream function and callback in the channel technology which allows reading frames from all streams and not just the default streams. The stream number has also been added to frames. This is to allow the case where frames are queued onto the channel instead of being read directly from the driver. This change does impose a restriction on reading though: a chain of frames can only contain frames from the same stream. ASTERISK-26816 Change-Id: I5d7dc35e86694df91fd025126f6cfe0453aa38ce
732 lines
19 KiB
C
732 lines
19 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Frame and codec manipulation routines
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*
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* \author Mark Spencer <markster@digium.com>
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*/
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/*** MODULEINFO
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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#include "asterisk/_private.h"
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#include "asterisk/lock.h"
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#include "asterisk/frame.h"
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#include "asterisk/format_cache.h"
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#include "asterisk/channel.h"
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#include "asterisk/cli.h"
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#include "asterisk/term.h"
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#include "asterisk/utils.h"
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#include "asterisk/threadstorage.h"
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#include "asterisk/linkedlists.h"
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#include "asterisk/translate.h"
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#include "asterisk/dsp.h"
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#include "asterisk/file.h"
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#if !defined(LOW_MEMORY)
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static void frame_cache_cleanup(void *data);
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/*! \brief A per-thread cache of frame headers */
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AST_THREADSTORAGE_CUSTOM(frame_cache, NULL, frame_cache_cleanup);
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/*!
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* \brief Maximum ast_frame cache size
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*
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* In most cases where the frame header cache will be useful, the size
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* of the cache will stay very small. However, it is not always the case that
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* the same thread that allocates the frame will be the one freeing them, so
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* sometimes a thread will never have any frames in its cache, or the cache
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* will never be pulled from. For the latter case, we limit the maximum size.
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*/
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#define FRAME_CACHE_MAX_SIZE 10
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/*! \brief This is just so ast_frames, a list head struct for holding a list of
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* ast_frame structures, is defined. */
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AST_LIST_HEAD_NOLOCK(ast_frames, ast_frame);
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struct ast_frame_cache {
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struct ast_frames list;
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size_t size;
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};
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#endif
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struct ast_frame ast_null_frame = { AST_FRAME_NULL, };
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static struct ast_frame *ast_frame_header_new(void)
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{
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struct ast_frame *f;
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#if !defined(LOW_MEMORY)
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struct ast_frame_cache *frames;
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if ((frames = ast_threadstorage_get(&frame_cache, sizeof(*frames)))) {
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if ((f = AST_LIST_REMOVE_HEAD(&frames->list, frame_list))) {
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size_t mallocd_len = f->mallocd_hdr_len;
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memset(f, 0, sizeof(*f));
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f->mallocd_hdr_len = mallocd_len;
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frames->size--;
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return f;
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}
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}
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if (!(f = ast_calloc_cache(1, sizeof(*f))))
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return NULL;
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#else
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if (!(f = ast_calloc(1, sizeof(*f))))
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return NULL;
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#endif
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f->mallocd_hdr_len = sizeof(*f);
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return f;
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}
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#if !defined(LOW_MEMORY)
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static void frame_cache_cleanup(void *data)
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{
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struct ast_frame_cache *frames = data;
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struct ast_frame *f;
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while ((f = AST_LIST_REMOVE_HEAD(&frames->list, frame_list)))
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ast_free(f);
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ast_free(frames);
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}
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#endif
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static void __frame_free(struct ast_frame *fr, int cache)
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{
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if (!fr->mallocd)
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return;
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#if !defined(LOW_MEMORY)
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if (cache && fr->mallocd == AST_MALLOCD_HDR) {
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/* Cool, only the header is malloc'd, let's just cache those for now
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* to keep things simple... */
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struct ast_frame_cache *frames;
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if ((frames = ast_threadstorage_get(&frame_cache, sizeof(*frames))) &&
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(frames->size < FRAME_CACHE_MAX_SIZE)) {
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if ((fr->frametype == AST_FRAME_VOICE) || (fr->frametype == AST_FRAME_VIDEO) ||
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(fr->frametype == AST_FRAME_IMAGE)) {
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ao2_cleanup(fr->subclass.format);
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}
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AST_LIST_INSERT_HEAD(&frames->list, fr, frame_list);
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frames->size++;
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return;
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}
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}
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#endif
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if (fr->mallocd & AST_MALLOCD_DATA) {
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if (fr->data.ptr) {
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ast_free(fr->data.ptr - fr->offset);
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}
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}
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if (fr->mallocd & AST_MALLOCD_SRC) {
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ast_free((void *) fr->src);
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}
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if (fr->mallocd & AST_MALLOCD_HDR) {
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if ((fr->frametype == AST_FRAME_VOICE) || (fr->frametype == AST_FRAME_VIDEO) ||
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(fr->frametype == AST_FRAME_IMAGE)) {
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ao2_cleanup(fr->subclass.format);
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}
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ast_free(fr);
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} else {
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fr->mallocd = 0;
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}
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}
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void ast_frame_free(struct ast_frame *frame, int cache)
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{
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struct ast_frame *next;
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for (next = AST_LIST_NEXT(frame, frame_list);
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frame;
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frame = next, next = frame ? AST_LIST_NEXT(frame, frame_list) : NULL) {
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__frame_free(frame, cache);
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}
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}
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void ast_frame_dtor(struct ast_frame *f)
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{
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if (f) {
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ast_frfree(f);
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}
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}
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/*!
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* \brief 'isolates' a frame by duplicating non-malloc'ed components
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* (header, src, data).
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* On return all components are malloc'ed
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*/
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struct ast_frame *ast_frisolate(struct ast_frame *fr)
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{
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struct ast_frame *out;
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void *newdata;
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/* if none of the existing frame is malloc'd, let ast_frdup() do it
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since it is more efficient
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*/
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if (fr->mallocd == 0) {
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return ast_frdup(fr);
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}
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/* if everything is already malloc'd, we are done */
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if ((fr->mallocd & (AST_MALLOCD_HDR | AST_MALLOCD_SRC | AST_MALLOCD_DATA)) ==
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(AST_MALLOCD_HDR | AST_MALLOCD_SRC | AST_MALLOCD_DATA)) {
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return fr;
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}
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if (!(fr->mallocd & AST_MALLOCD_HDR)) {
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/* Allocate a new header if needed */
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if (!(out = ast_frame_header_new())) {
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return NULL;
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}
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out->frametype = fr->frametype;
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out->subclass = fr->subclass;
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if ((fr->frametype == AST_FRAME_VOICE) || (fr->frametype == AST_FRAME_VIDEO) ||
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(fr->frametype == AST_FRAME_IMAGE)) {
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ao2_bump(out->subclass.format);
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}
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out->datalen = fr->datalen;
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out->samples = fr->samples;
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out->mallocd = AST_MALLOCD_HDR;
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out->offset = fr->offset;
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/* Copy the timing data */
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ast_copy_flags(out, fr, AST_FLAGS_ALL);
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if (ast_test_flag(fr, AST_FRFLAG_HAS_TIMING_INFO)) {
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out->ts = fr->ts;
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out->len = fr->len;
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out->seqno = fr->seqno;
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}
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out->stream_num = fr->stream_num;
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} else {
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out = fr;
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}
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if (fr->src) {
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/* The original frame has a source string */
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if (!(fr->mallocd & AST_MALLOCD_SRC)) {
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/*
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* The original frame has a non-malloced source string.
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*
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* Duplicate the string and put it into the isolated frame
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* which may also be the original frame.
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*/
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newdata = ast_strdup(fr->src);
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if (!newdata) {
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if (out != fr) {
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ast_frame_free(out, 0);
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}
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return NULL;
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}
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out->src = newdata;
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out->mallocd |= AST_MALLOCD_SRC;
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} else if (out != fr) {
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/* Steal the source string from the original frame. */
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out->src = fr->src;
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fr->src = NULL;
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fr->mallocd &= ~AST_MALLOCD_SRC;
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out->mallocd |= AST_MALLOCD_SRC;
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}
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}
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if (!(fr->mallocd & AST_MALLOCD_DATA)) {
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/* The original frame has a non-malloced data buffer. */
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if (!fr->datalen) {
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/* Actually it's just an int so we can simply copy it. */
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out->data.uint32 = fr->data.uint32;
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return out;
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}
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/*
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* Duplicate the data buffer and put it into the isolated frame
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* which may also be the original frame.
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*/
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newdata = ast_malloc(fr->datalen + AST_FRIENDLY_OFFSET);
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if (!newdata) {
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if (out != fr) {
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ast_frame_free(out, 0);
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}
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return NULL;
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}
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newdata += AST_FRIENDLY_OFFSET;
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out->offset = AST_FRIENDLY_OFFSET;
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memcpy(newdata, fr->data.ptr, fr->datalen);
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out->data.ptr = newdata;
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out->mallocd |= AST_MALLOCD_DATA;
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} else if (out != fr) {
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/* Steal the data buffer from the original frame. */
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out->data = fr->data;
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memset(&fr->data, 0, sizeof(fr->data));
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fr->mallocd &= ~AST_MALLOCD_DATA;
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out->mallocd |= AST_MALLOCD_DATA;
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}
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return out;
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}
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struct ast_frame *ast_frdup(const struct ast_frame *f)
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{
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struct ast_frame *out = NULL;
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int len, srclen = 0;
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void *buf = NULL;
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#if !defined(LOW_MEMORY)
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struct ast_frame_cache *frames;
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#endif
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/* Start with standard stuff */
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len = sizeof(*out) + AST_FRIENDLY_OFFSET + f->datalen;
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/* If we have a source, add space for it */
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/*
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* XXX Watch out here - if we receive a src which is not terminated
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* properly, we can be easily attacked. Should limit the size we deal with.
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*/
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if (f->src)
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srclen = strlen(f->src);
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if (srclen > 0)
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len += srclen + 1;
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#if !defined(LOW_MEMORY)
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if ((frames = ast_threadstorage_get(&frame_cache, sizeof(*frames)))) {
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AST_LIST_TRAVERSE_SAFE_BEGIN(&frames->list, out, frame_list) {
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if (out->mallocd_hdr_len >= len) {
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size_t mallocd_len = out->mallocd_hdr_len;
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AST_LIST_REMOVE_CURRENT(frame_list);
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memset(out, 0, sizeof(*out));
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out->mallocd_hdr_len = mallocd_len;
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buf = out;
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frames->size--;
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break;
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}
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}
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AST_LIST_TRAVERSE_SAFE_END;
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}
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#endif
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if (!buf) {
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if (!(buf = ast_calloc_cache(1, len)))
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return NULL;
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out = buf;
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out->mallocd_hdr_len = len;
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}
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out->frametype = f->frametype;
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out->subclass = f->subclass;
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if ((f->frametype == AST_FRAME_VOICE) || (f->frametype == AST_FRAME_VIDEO) ||
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(f->frametype == AST_FRAME_IMAGE)) {
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ao2_bump(out->subclass.format);
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}
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out->datalen = f->datalen;
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out->samples = f->samples;
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out->delivery = f->delivery;
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/* Even though this new frame was allocated from the heap, we can't mark it
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* with AST_MALLOCD_HDR, AST_MALLOCD_DATA and AST_MALLOCD_SRC, because that
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* would cause ast_frfree() to attempt to individually free each of those
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* under the assumption that they were separately allocated. Since this frame
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* was allocated in a single allocation, we'll only mark it as if the header
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* was heap-allocated; this will result in the entire frame being properly freed.
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*/
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out->mallocd = AST_MALLOCD_HDR;
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out->offset = AST_FRIENDLY_OFFSET;
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if (out->datalen) {
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out->data.ptr = buf + sizeof(*out) + AST_FRIENDLY_OFFSET;
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memcpy(out->data.ptr, f->data.ptr, out->datalen);
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} else {
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out->data.uint32 = f->data.uint32;
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}
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if (srclen > 0) {
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/* This may seem a little strange, but it's to avoid a gcc (4.2.4) compiler warning */
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char *src;
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out->src = buf + sizeof(*out) + AST_FRIENDLY_OFFSET + f->datalen;
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src = (char *) out->src;
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/* Must have space since we allocated for it */
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strcpy(src, f->src);
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}
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ast_copy_flags(out, f, AST_FLAGS_ALL);
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out->ts = f->ts;
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out->len = f->len;
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out->seqno = f->seqno;
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out->stream_num = f->stream_num;
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return out;
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}
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void ast_swapcopy_samples(void *dst, const void *src, int samples)
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{
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int i;
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unsigned short *dst_s = dst;
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const unsigned short *src_s = src;
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for (i = 0; i < samples; i++)
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dst_s[i] = (src_s[i]<<8) | (src_s[i]>>8);
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}
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void ast_frame_subclass2str(struct ast_frame *f, char *subclass, size_t slen, char *moreinfo, size_t mlen)
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{
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switch(f->frametype) {
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case AST_FRAME_DTMF_BEGIN:
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if (slen > 1) {
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subclass[0] = f->subclass.integer;
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subclass[1] = '\0';
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}
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break;
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case AST_FRAME_DTMF_END:
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if (slen > 1) {
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subclass[0] = f->subclass.integer;
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subclass[1] = '\0';
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}
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break;
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case AST_FRAME_CONTROL:
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switch (f->subclass.integer) {
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case AST_CONTROL_HANGUP:
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ast_copy_string(subclass, "Hangup", slen);
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break;
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case AST_CONTROL_RING:
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ast_copy_string(subclass, "Ring", slen);
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break;
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case AST_CONTROL_RINGING:
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ast_copy_string(subclass, "Ringing", slen);
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break;
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case AST_CONTROL_ANSWER:
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ast_copy_string(subclass, "Answer", slen);
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break;
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case AST_CONTROL_BUSY:
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ast_copy_string(subclass, "Busy", slen);
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break;
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case AST_CONTROL_TAKEOFFHOOK:
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ast_copy_string(subclass, "Take Off Hook", slen);
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break;
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case AST_CONTROL_OFFHOOK:
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ast_copy_string(subclass, "Line Off Hook", slen);
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break;
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case AST_CONTROL_CONGESTION:
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ast_copy_string(subclass, "Congestion", slen);
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break;
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case AST_CONTROL_FLASH:
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ast_copy_string(subclass, "Flash", slen);
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break;
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case AST_CONTROL_WINK:
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ast_copy_string(subclass, "Wink", slen);
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break;
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case AST_CONTROL_OPTION:
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ast_copy_string(subclass, "Option", slen);
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break;
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case AST_CONTROL_RADIO_KEY:
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ast_copy_string(subclass, "Key Radio", slen);
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break;
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case AST_CONTROL_RADIO_UNKEY:
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ast_copy_string(subclass, "Unkey Radio", slen);
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break;
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case AST_CONTROL_HOLD:
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ast_copy_string(subclass, "Hold", slen);
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break;
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case AST_CONTROL_UNHOLD:
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ast_copy_string(subclass, "Unhold", slen);
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break;
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case AST_CONTROL_T38_PARAMETERS: {
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char *message = "Unknown";
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if (f->datalen != sizeof(struct ast_control_t38_parameters)) {
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message = "Invalid";
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} else {
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struct ast_control_t38_parameters *parameters = f->data.ptr;
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enum ast_control_t38 state = parameters->request_response;
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if (state == AST_T38_REQUEST_NEGOTIATE)
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message = "Negotiation Requested";
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else if (state == AST_T38_REQUEST_TERMINATE)
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message = "Negotiation Request Terminated";
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else if (state == AST_T38_NEGOTIATED)
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message = "Negotiated";
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else if (state == AST_T38_TERMINATED)
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message = "Terminated";
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else if (state == AST_T38_REFUSED)
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message = "Refused";
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}
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snprintf(subclass, slen, "T38_Parameters/%s", message);
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break;
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}
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case -1:
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ast_copy_string(subclass, "Stop generators", slen);
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break;
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default:
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snprintf(subclass, slen, "Unknown control '%d'", f->subclass.integer);
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}
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break;
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case AST_FRAME_NULL:
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ast_copy_string(subclass, "N/A", slen);
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break;
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case AST_FRAME_IAX:
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/* Should never happen */
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snprintf(subclass, slen, "IAX Frametype %d", f->subclass.integer);
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break;
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case AST_FRAME_BRIDGE_ACTION:
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/* Should never happen */
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snprintf(subclass, slen, "Bridge Frametype %d", f->subclass.integer);
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break;
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case AST_FRAME_BRIDGE_ACTION_SYNC:
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/* Should never happen */
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snprintf(subclass, slen, "Synchronous Bridge Frametype %d", f->subclass.integer);
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break;
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case AST_FRAME_TEXT:
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ast_copy_string(subclass, "N/A", slen);
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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_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;
|
|
}
|