becd11ddb8
https://origsvn.digium.com/svn/asterisk/branches/1.4 ........ r43695 | file | 2006-09-26 16:09:41 -0400 (Tue, 26 Sep 2006) | 2 lines Slight overhaul of the whisper support. 1. We need to duplicate the frame from ast_translate 2. We need to ensure we always have signed linear coming in for signed linear combining. 3. We need to ensure we are always feeding signed linear out. 4. Properly store and restore write format when beeping on the channel we are whispering on. 5. Properly discontinue the stream on the channel for the beep. (issue #8019 reported by timkelly1980) ........ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@43696 65c4cc65-6c06-0410-ace0-fbb531ad65f3
146 lines
3.5 KiB
C
146 lines
3.5 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2005, Anthony Minessale II.
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*
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* Anthony Minessale <anthmct@yahoo.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 A machine to gather up arbitrary frames and convert them
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* to raw slinear on demand.
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*
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* \author Anthony Minessale <anthmct@yahoo.com>
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*/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include <string.h>
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#include "asterisk/frame.h"
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#include "asterisk/slinfactory.h"
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#include "asterisk/logger.h"
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#include "asterisk/translate.h"
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void ast_slinfactory_init(struct ast_slinfactory *sf)
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{
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memset(sf, 0, sizeof(*sf));
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sf->offset = sf->hold;
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}
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void ast_slinfactory_destroy(struct ast_slinfactory *sf)
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{
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struct ast_frame *f;
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if (sf->trans) {
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ast_translator_free_path(sf->trans);
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sf->trans = NULL;
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}
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while ((f = AST_LIST_REMOVE_HEAD(&sf->queue, frame_list)))
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ast_frfree(f);
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}
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int ast_slinfactory_feed(struct ast_slinfactory *sf, struct ast_frame *f)
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{
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struct ast_frame *frame, *frame_ptr;
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unsigned int x;
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if (f->subclass != AST_FORMAT_SLINEAR) {
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if (sf->trans && f->subclass != sf->format) {
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ast_translator_free_path(sf->trans);
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sf->trans = NULL;
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}
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if (!sf->trans) {
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if ((sf->trans = ast_translator_build_path(AST_FORMAT_SLINEAR, f->subclass)) == NULL) {
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ast_log(LOG_WARNING, "Cannot build a path from %s to slin\n", ast_getformatname(f->subclass));
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return 0;
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} else {
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sf->format = f->subclass;
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}
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}
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}
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if (!(frame = ast_frdup( (sf->trans) ? ast_translate(sf->trans, f, 0) : f )))
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return 0;
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x = 0;
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AST_LIST_TRAVERSE(&sf->queue, frame_ptr, frame_list)
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x++;
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AST_LIST_INSERT_TAIL(&sf->queue, frame, frame_list);
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sf->size += frame->samples;
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return x;
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}
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int ast_slinfactory_read(struct ast_slinfactory *sf, short *buf, size_t samples)
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{
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struct ast_frame *frame_ptr;
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unsigned int sofar = 0, ineed, remain;
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short *frame_data, *offset = buf;
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while (sofar < samples) {
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ineed = samples - sofar;
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if (sf->holdlen) {
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if ((sofar + sf->holdlen) <= ineed) {
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memcpy(offset, sf->hold, sf->holdlen * sizeof(*offset));
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sofar += sf->holdlen;
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offset += sf->holdlen;
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sf->holdlen = 0;
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sf->offset = sf->hold;
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} else {
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remain = sf->holdlen - ineed;
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memcpy(offset, sf->offset, ineed * sizeof(*offset));
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sofar += ineed;
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sf->offset += ineed;
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sf->holdlen = remain;
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}
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continue;
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}
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if ((frame_ptr = AST_LIST_REMOVE_HEAD(&sf->queue, frame_list))) {
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frame_data = frame_ptr->data;
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if ((sofar + frame_ptr->samples) <= ineed) {
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memcpy(offset, frame_data, frame_ptr->samples * sizeof(*offset));
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sofar += frame_ptr->samples;
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offset += frame_ptr->samples;
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} else {
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remain = frame_ptr->samples - ineed;
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memcpy(offset, frame_data, ineed * sizeof(*offset));
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sofar += ineed;
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frame_data += ineed;
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memcpy(sf->hold, frame_data, remain * sizeof(*offset));
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sf->holdlen = remain;
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}
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ast_frfree(frame_ptr);
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} else {
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break;
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}
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}
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sf->size -= sofar;
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return sofar;
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}
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unsigned int ast_slinfactory_available(const struct ast_slinfactory *sf)
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{
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return sf->size;
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}
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