and denoising to a channel, AGC() and DENOISE(). Also included, is a change to the audiohook API to add a new function (ast_audiohook_remove) that can remove an audiohook from a channel before it is detached. This code is based on a contribution from Switchvox. git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@114926 65c4cc65-6c06-0410-ace0-fbb531ad65f3
944 lines
33 KiB
C
944 lines
33 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2007, Digium, Inc.
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*
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* Joshua Colp <jcolp@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 Audiohooks Architecture
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*
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* \author Joshua 'file' Colp <jcolp@digium.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 <signal.h>
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#include "asterisk/channel.h"
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#include "asterisk/utils.h"
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#include "asterisk/lock.h"
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#include "asterisk/linkedlists.h"
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#include "asterisk/audiohook.h"
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#include "asterisk/slinfactory.h"
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#include "asterisk/frame.h"
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#include "asterisk/translate.h"
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struct ast_audiohook_translate {
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struct ast_trans_pvt *trans_pvt;
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int format;
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};
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struct ast_audiohook_list {
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struct ast_audiohook_translate in_translate[2];
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struct ast_audiohook_translate out_translate[2];
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AST_LIST_HEAD_NOLOCK(, ast_audiohook) spy_list;
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AST_LIST_HEAD_NOLOCK(, ast_audiohook) whisper_list;
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AST_LIST_HEAD_NOLOCK(, ast_audiohook) manipulate_list;
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};
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/*! \brief Initialize an audiohook structure
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* \param audiohook Audiohook structure
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* \param type
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* \param source
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* \return Returns 0 on success, -1 on failure
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*/
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int ast_audiohook_init(struct ast_audiohook *audiohook, enum ast_audiohook_type type, const char *source)
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{
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/* Need to keep the type and source */
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audiohook->type = type;
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audiohook->source = source;
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/* Initialize lock that protects our audiohook */
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ast_mutex_init(&audiohook->lock);
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ast_cond_init(&audiohook->trigger, NULL);
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/* Setup the factories that are needed for this audiohook type */
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switch (type) {
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case AST_AUDIOHOOK_TYPE_SPY:
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ast_slinfactory_init(&audiohook->read_factory);
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case AST_AUDIOHOOK_TYPE_WHISPER:
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ast_slinfactory_init(&audiohook->write_factory);
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break;
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default:
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break;
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}
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/* Since we are just starting out... this audiohook is new */
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audiohook->status = AST_AUDIOHOOK_STATUS_NEW;
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return 0;
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}
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/*! \brief Destroys an audiohook structure
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* \param audiohook Audiohook structure
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* \return Returns 0 on success, -1 on failure
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*/
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int ast_audiohook_destroy(struct ast_audiohook *audiohook)
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{
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/* Drop the factories used by this audiohook type */
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switch (audiohook->type) {
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case AST_AUDIOHOOK_TYPE_SPY:
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ast_slinfactory_destroy(&audiohook->read_factory);
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case AST_AUDIOHOOK_TYPE_WHISPER:
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ast_slinfactory_destroy(&audiohook->write_factory);
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break;
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default:
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break;
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}
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/* Destroy translation path if present */
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if (audiohook->trans_pvt)
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ast_translator_free_path(audiohook->trans_pvt);
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/* Lock and trigger be gone! */
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ast_cond_destroy(&audiohook->trigger);
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ast_mutex_destroy(&audiohook->lock);
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return 0;
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}
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/*! \brief Writes a frame into the audiohook structure
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* \param audiohook Audiohook structure
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* \param direction Direction the audio frame came from
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* \param frame Frame to write in
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* \return Returns 0 on success, -1 on failure
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*/
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int ast_audiohook_write_frame(struct ast_audiohook *audiohook, enum ast_audiohook_direction direction, struct ast_frame *frame)
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{
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struct ast_slinfactory *factory = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->read_factory : &audiohook->write_factory);
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struct ast_slinfactory *other_factory = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->write_factory : &audiohook->read_factory);
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struct timeval *time = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->read_time : &audiohook->write_time), previous_time = *time;
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/* Update last feeding time to be current */
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*time = ast_tvnow();
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/* If we are using a sync trigger and this factory suddenly got audio fed in after a lapse, then flush both factories to ensure they remain in sync */
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if (ast_test_flag(audiohook, AST_AUDIOHOOK_TRIGGER_SYNC) && ast_slinfactory_available(other_factory) && (ast_tvdiff_ms(*time, previous_time) > (ast_slinfactory_available(other_factory) / 8))) {
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if (option_debug)
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ast_log(LOG_DEBUG, "Flushing audiohook %p so it remains in sync\n", audiohook);
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ast_slinfactory_flush(factory);
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ast_slinfactory_flush(other_factory);
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}
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/* Write frame out to respective factory */
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ast_slinfactory_feed(factory, frame);
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/* If we need to notify the respective handler of this audiohook, do so */
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if ((ast_test_flag(audiohook, AST_AUDIOHOOK_TRIGGER_MODE) == AST_AUDIOHOOK_TRIGGER_READ) && (direction == AST_AUDIOHOOK_DIRECTION_READ)) {
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ast_cond_signal(&audiohook->trigger);
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} else if ((ast_test_flag(audiohook, AST_AUDIOHOOK_TRIGGER_MODE) == AST_AUDIOHOOK_TRIGGER_WRITE) && (direction == AST_AUDIOHOOK_DIRECTION_WRITE)) {
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ast_cond_signal(&audiohook->trigger);
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} else if (ast_test_flag(audiohook, AST_AUDIOHOOK_TRIGGER_SYNC)) {
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ast_cond_signal(&audiohook->trigger);
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}
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return 0;
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}
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static struct ast_frame *audiohook_read_frame_single(struct ast_audiohook *audiohook, size_t samples, enum ast_audiohook_direction direction)
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{
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struct ast_slinfactory *factory = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook->read_factory : &audiohook->write_factory);
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int vol = (direction == AST_AUDIOHOOK_DIRECTION_READ ? audiohook->options.read_volume : audiohook->options.write_volume);
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short buf[samples];
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struct ast_frame frame = {
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.frametype = AST_FRAME_VOICE,
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.subclass = AST_FORMAT_SLINEAR,
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.data = buf,
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.datalen = sizeof(buf),
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.samples = samples,
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};
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/* Ensure the factory is able to give us the samples we want */
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if (samples > ast_slinfactory_available(factory))
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return NULL;
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/* Read data in from factory */
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if (!ast_slinfactory_read(factory, buf, samples))
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return NULL;
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/* If a volume adjustment needs to be applied apply it */
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if (vol)
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ast_frame_adjust_volume(&frame, vol);
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return ast_frdup(&frame);
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}
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static struct ast_frame *audiohook_read_frame_both(struct ast_audiohook *audiohook, size_t samples)
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{
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int i = 0, usable_read, usable_write;
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short buf1[samples], buf2[samples], *read_buf = NULL, *write_buf = NULL, *final_buf = NULL, *data1 = NULL, *data2 = NULL;
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struct ast_frame frame = {
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.frametype = AST_FRAME_VOICE,
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.subclass = AST_FORMAT_SLINEAR,
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.data = NULL,
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.datalen = sizeof(buf1),
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.samples = samples,
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};
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/* Make sure both factories have the required samples */
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usable_read = (ast_slinfactory_available(&audiohook->read_factory) >= samples ? 1 : 0);
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usable_write = (ast_slinfactory_available(&audiohook->write_factory) >= samples ? 1 : 0);
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if (!usable_read && !usable_write) {
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/* If both factories are unusable bail out */
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ast_debug(1, "Read factory %p and write factory %p both fail to provide %zd samples\n", &audiohook->read_factory, &audiohook->write_factory, samples);
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return NULL;
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}
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/* If we want to provide only a read factory make sure we aren't waiting for other audio */
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if (usable_read && !usable_write && (ast_tvdiff_ms(ast_tvnow(), audiohook->write_time) < (samples/8)*2)) {
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ast_debug(1, "Write factory %p was pretty quick last time, waiting for them.\n", &audiohook->write_factory);
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return NULL;
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}
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/* If we want to provide only a write factory make sure we aren't waiting for other audio */
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if (usable_write && !usable_read && (ast_tvdiff_ms(ast_tvnow(), audiohook->write_time) < (samples/8)*2)) {
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ast_debug(1, "Read factory %p was pretty quick last time, waiting for them.\n", &audiohook->read_factory);
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return NULL;
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}
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/* Start with the read factory... if there are enough samples, read them in */
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if (usable_read && ast_slinfactory_available(&audiohook->read_factory) >= samples) {
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if (ast_slinfactory_read(&audiohook->read_factory, buf1, samples)) {
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read_buf = buf1;
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/* Adjust read volume if need be */
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if (audiohook->options.read_volume) {
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int count = 0;
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short adjust_value = abs(audiohook->options.read_volume);
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for (count = 0; count < samples; count++) {
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if (audiohook->options.read_volume > 0)
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ast_slinear_saturated_multiply(&buf1[count], &adjust_value);
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else if (audiohook->options.read_volume < 0)
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ast_slinear_saturated_divide(&buf1[count], &adjust_value);
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}
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}
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}
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} else if (option_debug)
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ast_log(LOG_DEBUG, "Failed to get %d samples from read factory %p\n", (int)samples, &audiohook->read_factory);
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/* Move on to the write factory... if there are enough samples, read them in */
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if (usable_write && ast_slinfactory_available(&audiohook->write_factory) >= samples) {
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if (ast_slinfactory_read(&audiohook->write_factory, buf2, samples)) {
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write_buf = buf2;
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/* Adjust write volume if need be */
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if (audiohook->options.write_volume) {
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int count = 0;
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short adjust_value = abs(audiohook->options.write_volume);
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for (count = 0; count < samples; count++) {
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if (audiohook->options.write_volume > 0)
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ast_slinear_saturated_multiply(&buf2[count], &adjust_value);
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else if (audiohook->options.write_volume < 0)
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ast_slinear_saturated_divide(&buf2[count], &adjust_value);
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}
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}
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}
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} else if (option_debug)
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ast_log(LOG_DEBUG, "Failed to get %d samples from write factory %p\n", (int)samples, &audiohook->write_factory);
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/* Basically we figure out which buffer to use... and if mixing can be done here */
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if (!read_buf && !write_buf)
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return NULL;
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else if (read_buf && write_buf) {
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for (i = 0, data1 = read_buf, data2 = write_buf; i < samples; i++, data1++, data2++)
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ast_slinear_saturated_add(data1, data2);
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final_buf = buf1;
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} else if (read_buf)
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final_buf = buf1;
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else if (write_buf)
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final_buf = buf2;
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/* Make the final buffer part of the frame, so it gets duplicated fine */
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frame.data = final_buf;
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/* Yahoo, a combined copy of the audio! */
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return ast_frdup(&frame);
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}
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/*! \brief Reads a frame in from the audiohook structure
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* \param audiohook Audiohook structure
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* \param samples Number of samples wanted
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* \param direction Direction the audio frame came from
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* \param format Format of frame remote side wants back
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* \return Returns frame on success, NULL on failure
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*/
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struct ast_frame *ast_audiohook_read_frame(struct ast_audiohook *audiohook, size_t samples, enum ast_audiohook_direction direction, int format)
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{
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struct ast_frame *read_frame = NULL, *final_frame = NULL;
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if (!(read_frame = (direction == AST_AUDIOHOOK_DIRECTION_BOTH ? audiohook_read_frame_both(audiohook, samples) : audiohook_read_frame_single(audiohook, samples, direction))))
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return NULL;
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/* If they don't want signed linear back out, we'll have to send it through the translation path */
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if (format != AST_FORMAT_SLINEAR) {
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/* Rebuild translation path if different format then previously */
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if (audiohook->format != format) {
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if (audiohook->trans_pvt) {
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ast_translator_free_path(audiohook->trans_pvt);
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audiohook->trans_pvt = NULL;
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}
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/* Setup new translation path for this format... if we fail we can't very well return signed linear so free the frame and return nothing */
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if (!(audiohook->trans_pvt = ast_translator_build_path(format, AST_FORMAT_SLINEAR))) {
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ast_frfree(read_frame);
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return NULL;
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}
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}
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/* Convert to requested format, and allow the read in frame to be freed */
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final_frame = ast_translate(audiohook->trans_pvt, read_frame, 1);
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} else {
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final_frame = read_frame;
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}
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return final_frame;
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}
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/*! \brief Attach audiohook to channel
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* \param chan Channel
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* \param audiohook Audiohook structure
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* \return Returns 0 on success, -1 on failure
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*/
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int ast_audiohook_attach(struct ast_channel *chan, struct ast_audiohook *audiohook)
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{
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ast_channel_lock(chan);
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if (!chan->audiohooks) {
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/* Whoops... allocate a new structure */
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if (!(chan->audiohooks = ast_calloc(1, sizeof(*chan->audiohooks)))) {
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ast_channel_unlock(chan);
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return -1;
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}
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AST_LIST_HEAD_INIT_NOLOCK(&chan->audiohooks->spy_list);
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AST_LIST_HEAD_INIT_NOLOCK(&chan->audiohooks->whisper_list);
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AST_LIST_HEAD_INIT_NOLOCK(&chan->audiohooks->manipulate_list);
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}
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/* Drop into respective list */
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if (audiohook->type == AST_AUDIOHOOK_TYPE_SPY)
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AST_LIST_INSERT_TAIL(&chan->audiohooks->spy_list, audiohook, list);
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else if (audiohook->type == AST_AUDIOHOOK_TYPE_WHISPER)
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AST_LIST_INSERT_TAIL(&chan->audiohooks->whisper_list, audiohook, list);
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else if (audiohook->type == AST_AUDIOHOOK_TYPE_MANIPULATE)
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AST_LIST_INSERT_TAIL(&chan->audiohooks->manipulate_list, audiohook, list);
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/* Change status over to running since it is now attached */
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audiohook->status = AST_AUDIOHOOK_STATUS_RUNNING;
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ast_channel_unlock(chan);
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return 0;
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}
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/*! \brief Detach audiohook from channel
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* \param audiohook Audiohook structure
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* \return Returns 0 on success, -1 on failure
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*/
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int ast_audiohook_detach(struct ast_audiohook *audiohook)
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{
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if (audiohook->status == AST_AUDIOHOOK_STATUS_DONE)
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return 0;
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audiohook->status = AST_AUDIOHOOK_STATUS_SHUTDOWN;
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while (audiohook->status != AST_AUDIOHOOK_STATUS_DONE)
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ast_audiohook_trigger_wait(audiohook);
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return 0;
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}
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/*! \brief Detach audiohooks from list and destroy said list
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* \param audiohook_list List of audiohooks
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* \return Returns 0 on success, -1 on failure
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*/
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int ast_audiohook_detach_list(struct ast_audiohook_list *audiohook_list)
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{
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int i = 0;
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struct ast_audiohook *audiohook = NULL;
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/* Drop any spies */
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while ((audiohook = AST_LIST_REMOVE_HEAD(&audiohook_list->spy_list, list))) {
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ast_audiohook_lock(audiohook);
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audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
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ast_cond_signal(&audiohook->trigger);
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ast_audiohook_unlock(audiohook);
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}
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/* Drop any whispering sources */
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while ((audiohook = AST_LIST_REMOVE_HEAD(&audiohook_list->whisper_list, list))) {
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ast_audiohook_lock(audiohook);
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audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
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ast_cond_signal(&audiohook->trigger);
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ast_audiohook_unlock(audiohook);
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}
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/* Drop any manipulaters */
|
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while ((audiohook = AST_LIST_REMOVE_HEAD(&audiohook_list->manipulate_list, list))) {
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ast_audiohook_lock(audiohook);
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audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
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ast_audiohook_unlock(audiohook);
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audiohook->manipulate_callback(audiohook, NULL, NULL, 0);
|
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}
|
|
|
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/* Drop translation paths if present */
|
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for (i = 0; i < 2; i++) {
|
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if (audiohook_list->in_translate[i].trans_pvt)
|
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ast_translator_free_path(audiohook_list->in_translate[i].trans_pvt);
|
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if (audiohook_list->out_translate[i].trans_pvt)
|
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ast_translator_free_path(audiohook_list->out_translate[i].trans_pvt);
|
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}
|
|
|
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/* Free ourselves */
|
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ast_free(audiohook_list);
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|
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return 0;
|
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}
|
|
|
|
static struct ast_audiohook *find_audiohook_by_source(struct ast_audiohook_list *audiohook_list, const char *source)
|
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{
|
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struct ast_audiohook *audiohook = NULL;
|
|
|
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AST_LIST_TRAVERSE(&audiohook_list->spy_list, audiohook, list) {
|
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if (!strcasecmp(audiohook->source, source))
|
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return audiohook;
|
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}
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|
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AST_LIST_TRAVERSE(&audiohook_list->whisper_list, audiohook, list) {
|
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if (!strcasecmp(audiohook->source, source))
|
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return audiohook;
|
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}
|
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AST_LIST_TRAVERSE(&audiohook_list->manipulate_list, audiohook, list) {
|
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if (!strcasecmp(audiohook->source, source))
|
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return audiohook;
|
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}
|
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|
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return NULL;
|
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}
|
|
|
|
/*! \brief Detach specified source audiohook from channel
|
|
* \param chan Channel to detach from
|
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* \param source Name of source to detach
|
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* \return Returns 0 on success, -1 on failure
|
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*/
|
|
int ast_audiohook_detach_source(struct ast_channel *chan, const char *source)
|
|
{
|
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struct ast_audiohook *audiohook = NULL;
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|
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ast_channel_lock(chan);
|
|
|
|
/* Ensure the channel has audiohooks on it */
|
|
if (!chan->audiohooks) {
|
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ast_channel_unlock(chan);
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return -1;
|
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}
|
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|
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audiohook = find_audiohook_by_source(chan->audiohooks, source);
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|
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ast_channel_unlock(chan);
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|
|
|
if (audiohook && audiohook->status != AST_AUDIOHOOK_STATUS_DONE)
|
|
audiohook->status = AST_AUDIOHOOK_STATUS_SHUTDOWN;
|
|
|
|
return (audiohook ? 0 : -1);
|
|
}
|
|
|
|
/*!
|
|
* \brief Remove an audiohook from a specified channel
|
|
*
|
|
* \param chan Channel to remove from
|
|
* \param audiohook Audiohook to remove
|
|
*
|
|
* \return Returns 0 on success, -1 on failure
|
|
*
|
|
* \note The channel does not need to be locked before calling this function
|
|
*/
|
|
int ast_audiohook_remove(struct ast_channel *chan, struct ast_audiohook *audiohook)
|
|
{
|
|
ast_channel_lock(chan);
|
|
|
|
if (!chan->audiohooks) {
|
|
ast_channel_unlock(chan);
|
|
return -1;
|
|
}
|
|
|
|
if (audiohook->type == AST_AUDIOHOOK_TYPE_SPY)
|
|
AST_LIST_REMOVE(&chan->audiohooks->spy_list, audiohook, list);
|
|
else if (audiohook->type == AST_AUDIOHOOK_TYPE_WHISPER)
|
|
AST_LIST_REMOVE(&chan->audiohooks->whisper_list, audiohook, list);
|
|
else if (audiohook->type == AST_AUDIOHOOK_TYPE_MANIPULATE)
|
|
AST_LIST_REMOVE(&chan->audiohooks->manipulate_list, audiohook, list);
|
|
|
|
ast_audiohook_lock(audiohook);
|
|
audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
|
|
ast_cond_signal(&audiohook->trigger);
|
|
ast_audiohook_unlock(audiohook);
|
|
|
|
ast_channel_unlock(chan);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*! \brief Pass a DTMF frame off to be handled by the audiohook core
|
|
* \param chan Channel that the list is coming off of
|
|
* \param audiohook_list List of audiohooks
|
|
* \param direction Direction frame is coming in from
|
|
* \param frame The frame itself
|
|
* \return Return frame on success, NULL on failure
|
|
*/
|
|
static struct ast_frame *dtmf_audiohook_write_list(struct ast_channel *chan, struct ast_audiohook_list *audiohook_list, enum ast_audiohook_direction direction, struct ast_frame *frame)
|
|
{
|
|
struct ast_audiohook *audiohook = NULL;
|
|
|
|
AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->manipulate_list, audiohook, list) {
|
|
ast_audiohook_lock(audiohook);
|
|
if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING) {
|
|
AST_LIST_REMOVE_CURRENT(list);
|
|
audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
|
|
ast_audiohook_unlock(audiohook);
|
|
audiohook->manipulate_callback(audiohook, NULL, NULL, 0);
|
|
continue;
|
|
}
|
|
if (ast_test_flag(audiohook, AST_AUDIOHOOK_WANTS_DTMF))
|
|
audiohook->manipulate_callback(audiohook, chan, frame, direction);
|
|
ast_audiohook_unlock(audiohook);
|
|
}
|
|
AST_LIST_TRAVERSE_SAFE_END;
|
|
|
|
return frame;
|
|
}
|
|
|
|
/*! \brief Pass an AUDIO frame off to be handled by the audiohook core
|
|
* \param chan Channel that the list is coming off of
|
|
* \param audiohook_list List of audiohooks
|
|
* \param direction Direction frame is coming in from
|
|
* \param frame The frame itself
|
|
* \return Return frame on success, NULL on failure
|
|
*/
|
|
static struct ast_frame *audio_audiohook_write_list(struct ast_channel *chan, struct ast_audiohook_list *audiohook_list, enum ast_audiohook_direction direction, struct ast_frame *frame)
|
|
{
|
|
struct ast_audiohook_translate *in_translate = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook_list->in_translate[0] : &audiohook_list->in_translate[1]);
|
|
struct ast_audiohook_translate *out_translate = (direction == AST_AUDIOHOOK_DIRECTION_READ ? &audiohook_list->out_translate[0] : &audiohook_list->out_translate[1]);
|
|
struct ast_frame *start_frame = frame, *middle_frame = frame, *end_frame = frame;
|
|
struct ast_audiohook *audiohook = NULL;
|
|
int samples = frame->samples;
|
|
|
|
/* If the frame coming in is not signed linear we have to send it through the in_translate path */
|
|
if (frame->subclass != AST_FORMAT_SLINEAR) {
|
|
if (in_translate->format != frame->subclass) {
|
|
if (in_translate->trans_pvt)
|
|
ast_translator_free_path(in_translate->trans_pvt);
|
|
if (!(in_translate->trans_pvt = ast_translator_build_path(AST_FORMAT_SLINEAR, frame->subclass)))
|
|
return frame;
|
|
in_translate->format = frame->subclass;
|
|
}
|
|
if (!(middle_frame = ast_translate(in_translate->trans_pvt, frame, 0)))
|
|
return frame;
|
|
}
|
|
|
|
/* Queue up signed linear frame to each spy */
|
|
AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->spy_list, audiohook, list) {
|
|
ast_audiohook_lock(audiohook);
|
|
if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING) {
|
|
AST_LIST_REMOVE_CURRENT(list);
|
|
audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
|
|
ast_cond_signal(&audiohook->trigger);
|
|
ast_audiohook_unlock(audiohook);
|
|
continue;
|
|
}
|
|
ast_audiohook_write_frame(audiohook, direction, middle_frame);
|
|
ast_audiohook_unlock(audiohook);
|
|
}
|
|
AST_LIST_TRAVERSE_SAFE_END
|
|
|
|
/* If this frame is being written out to the channel then we need to use whisper sources */
|
|
if (direction == AST_AUDIOHOOK_DIRECTION_WRITE && !AST_LIST_EMPTY(&audiohook_list->whisper_list)) {
|
|
int i = 0;
|
|
short read_buf[samples], combine_buf[samples], *data1 = NULL, *data2 = NULL;
|
|
memset(&combine_buf, 0, sizeof(combine_buf));
|
|
AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->whisper_list, audiohook, list) {
|
|
ast_audiohook_lock(audiohook);
|
|
if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING) {
|
|
AST_LIST_REMOVE_CURRENT(list);
|
|
audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
|
|
ast_cond_signal(&audiohook->trigger);
|
|
ast_audiohook_unlock(audiohook);
|
|
continue;
|
|
}
|
|
if (ast_slinfactory_available(&audiohook->write_factory) >= samples && ast_slinfactory_read(&audiohook->write_factory, read_buf, samples)) {
|
|
/* Take audio from this whisper source and combine it into our main buffer */
|
|
for (i = 0, data1 = combine_buf, data2 = read_buf; i < samples; i++, data1++, data2++)
|
|
ast_slinear_saturated_add(data1, data2);
|
|
}
|
|
ast_audiohook_unlock(audiohook);
|
|
}
|
|
AST_LIST_TRAVERSE_SAFE_END
|
|
/* We take all of the combined whisper sources and combine them into the audio being written out */
|
|
for (i = 0, data1 = middle_frame->data, data2 = combine_buf; i < samples; i++, data1++, data2++)
|
|
ast_slinear_saturated_add(data1, data2);
|
|
end_frame = middle_frame;
|
|
}
|
|
|
|
/* Pass off frame to manipulate audiohooks */
|
|
if (!AST_LIST_EMPTY(&audiohook_list->manipulate_list)) {
|
|
AST_LIST_TRAVERSE_SAFE_BEGIN(&audiohook_list->manipulate_list, audiohook, list) {
|
|
ast_audiohook_lock(audiohook);
|
|
if (audiohook->status != AST_AUDIOHOOK_STATUS_RUNNING) {
|
|
AST_LIST_REMOVE_CURRENT(list);
|
|
audiohook->status = AST_AUDIOHOOK_STATUS_DONE;
|
|
ast_audiohook_unlock(audiohook);
|
|
/* We basically drop all of our links to the manipulate audiohook and prod it to do it's own destructive things */
|
|
audiohook->manipulate_callback(audiohook, chan, NULL, direction);
|
|
continue;
|
|
}
|
|
/* Feed in frame to manipulation */
|
|
audiohook->manipulate_callback(audiohook, chan, middle_frame, direction);
|
|
ast_audiohook_unlock(audiohook);
|
|
}
|
|
AST_LIST_TRAVERSE_SAFE_END
|
|
end_frame = middle_frame;
|
|
}
|
|
|
|
/* Now we figure out what to do with our end frame (whether to transcode or not) */
|
|
if (middle_frame == end_frame) {
|
|
/* Middle frame was modified and became the end frame... let's see if we need to transcode */
|
|
if (end_frame->subclass != start_frame->subclass) {
|
|
if (out_translate->format != start_frame->subclass) {
|
|
if (out_translate->trans_pvt)
|
|
ast_translator_free_path(out_translate->trans_pvt);
|
|
if (!(out_translate->trans_pvt = ast_translator_build_path(start_frame->subclass, AST_FORMAT_SLINEAR))) {
|
|
/* We can't transcode this... drop our middle frame and return the original */
|
|
ast_frfree(middle_frame);
|
|
return start_frame;
|
|
}
|
|
out_translate->format = start_frame->subclass;
|
|
}
|
|
/* Transcode from our middle (signed linear) frame to new format of the frame that came in */
|
|
if (!(end_frame = ast_translate(out_translate->trans_pvt, middle_frame, 0))) {
|
|
/* Failed to transcode the frame... drop it and return the original */
|
|
ast_frfree(middle_frame);
|
|
return start_frame;
|
|
}
|
|
/* Here's the scoop... middle frame is no longer of use to us */
|
|
ast_frfree(middle_frame);
|
|
}
|
|
} else {
|
|
/* No frame was modified, we can just drop our middle frame and pass the frame we got in out */
|
|
ast_frfree(middle_frame);
|
|
}
|
|
|
|
return end_frame;
|
|
}
|
|
|
|
/*! \brief Pass a frame off to be handled by the audiohook core
|
|
* \param chan Channel that the list is coming off of
|
|
* \param audiohook_list List of audiohooks
|
|
* \param direction Direction frame is coming in from
|
|
* \param frame The frame itself
|
|
* \return Return frame on success, NULL on failure
|
|
*/
|
|
struct ast_frame *ast_audiohook_write_list(struct ast_channel *chan, struct ast_audiohook_list *audiohook_list, enum ast_audiohook_direction direction, struct ast_frame *frame)
|
|
{
|
|
/* Pass off frame to it's respective list write function */
|
|
if (frame->frametype == AST_FRAME_VOICE)
|
|
return audio_audiohook_write_list(chan, audiohook_list, direction, frame);
|
|
else if (frame->frametype == AST_FRAME_DTMF)
|
|
return dtmf_audiohook_write_list(chan, audiohook_list, direction, frame);
|
|
else
|
|
return frame;
|
|
}
|
|
|
|
|
|
/*! \brief Wait for audiohook trigger to be triggered
|
|
* \param audiohook Audiohook to wait on
|
|
*/
|
|
void ast_audiohook_trigger_wait(struct ast_audiohook *audiohook)
|
|
{
|
|
struct timeval tv;
|
|
struct timespec ts;
|
|
|
|
tv = ast_tvadd(ast_tvnow(), ast_samp2tv(50000, 1000));
|
|
ts.tv_sec = tv.tv_sec;
|
|
ts.tv_nsec = tv.tv_usec * 1000;
|
|
|
|
ast_cond_timedwait(&audiohook->trigger, &audiohook->lock, &ts);
|
|
|
|
return;
|
|
}
|
|
|
|
/* Count number of channel audiohooks by type, regardless of type */
|
|
int ast_channel_audiohook_count_by_source(struct ast_channel *chan, const char *source, enum ast_audiohook_type type)
|
|
{
|
|
int count = 0;
|
|
struct ast_audiohook *ah = NULL;
|
|
|
|
if (!chan->audiohooks)
|
|
return -1;
|
|
|
|
switch (type) {
|
|
case AST_AUDIOHOOK_TYPE_SPY:
|
|
AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->audiohooks->spy_list, ah, list) {
|
|
if (!strcmp(ah->source, source)) {
|
|
count++;
|
|
}
|
|
}
|
|
AST_LIST_TRAVERSE_SAFE_END;
|
|
break;
|
|
case AST_AUDIOHOOK_TYPE_WHISPER:
|
|
AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->audiohooks->whisper_list, ah, list) {
|
|
if (!strcmp(ah->source, source)) {
|
|
count++;
|
|
}
|
|
}
|
|
AST_LIST_TRAVERSE_SAFE_END;
|
|
break;
|
|
case AST_AUDIOHOOK_TYPE_MANIPULATE:
|
|
AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->audiohooks->manipulate_list, ah, list) {
|
|
if (!strcmp(ah->source, source)) {
|
|
count++;
|
|
}
|
|
}
|
|
AST_LIST_TRAVERSE_SAFE_END;
|
|
break;
|
|
default:
|
|
ast_log(LOG_DEBUG, "Invalid audiohook type supplied, (%d)\n", type);
|
|
return -1;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
/* Count number of channel audiohooks by type that are running */
|
|
int ast_channel_audiohook_count_by_source_running(struct ast_channel *chan, const char *source, enum ast_audiohook_type type)
|
|
{
|
|
int count = 0;
|
|
struct ast_audiohook *ah = NULL;
|
|
if (!chan->audiohooks)
|
|
return -1;
|
|
|
|
switch (type) {
|
|
case AST_AUDIOHOOK_TYPE_SPY:
|
|
AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->audiohooks->spy_list, ah, list) {
|
|
if ((!strcmp(ah->source, source)) && (ah->status == AST_AUDIOHOOK_STATUS_RUNNING))
|
|
count++;
|
|
}
|
|
AST_LIST_TRAVERSE_SAFE_END;
|
|
break;
|
|
case AST_AUDIOHOOK_TYPE_WHISPER:
|
|
AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->audiohooks->whisper_list, ah, list) {
|
|
if ((!strcmp(ah->source, source)) && (ah->status == AST_AUDIOHOOK_STATUS_RUNNING))
|
|
count++;
|
|
}
|
|
AST_LIST_TRAVERSE_SAFE_END;
|
|
break;
|
|
case AST_AUDIOHOOK_TYPE_MANIPULATE:
|
|
AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->audiohooks->manipulate_list, ah, list) {
|
|
if ((!strcmp(ah->source, source)) && (ah->status == AST_AUDIOHOOK_STATUS_RUNNING))
|
|
count++;
|
|
}
|
|
AST_LIST_TRAVERSE_SAFE_END;
|
|
break;
|
|
default:
|
|
ast_log(LOG_DEBUG, "Invalid audiohook type supplied, (%d)\n", type);
|
|
return -1;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
/*! \brief Audiohook volume adjustment structure */
|
|
struct audiohook_volume {
|
|
struct ast_audiohook audiohook; /*!< Audiohook attached to the channel */
|
|
int read_adjustment; /*!< Value to adjust frames read from the channel by */
|
|
int write_adjustment; /*!< Value to adjust frames written to the channel by */
|
|
};
|
|
|
|
/*! \brief Callback used to destroy the audiohook volume datastore
|
|
* \param data Volume information structure
|
|
* \return Returns nothing
|
|
*/
|
|
static void audiohook_volume_destroy(void *data)
|
|
{
|
|
struct audiohook_volume *audiohook_volume = data;
|
|
|
|
/* Destroy the audiohook as it is no longer in use */
|
|
ast_audiohook_destroy(&audiohook_volume->audiohook);
|
|
|
|
/* Finally free ourselves, we are of no more use */
|
|
ast_free(audiohook_volume);
|
|
|
|
return;
|
|
}
|
|
|
|
/*! \brief Datastore used to store audiohook volume information */
|
|
static const struct ast_datastore_info audiohook_volume_datastore = {
|
|
.type = "Volume",
|
|
.destroy = audiohook_volume_destroy,
|
|
};
|
|
|
|
/*! \brief Helper function which actually gets called by audiohooks to perform the adjustment
|
|
* \param audiohook Audiohook attached to the channel
|
|
* \param chan Channel we are attached to
|
|
* \param frame Frame of audio we want to manipulate
|
|
* \param direction Direction the audio came in from
|
|
* \return Returns 0 on success, -1 on failure
|
|
*/
|
|
static int audiohook_volume_callback(struct ast_audiohook *audiohook, struct ast_channel *chan, struct ast_frame *frame, enum ast_audiohook_direction direction)
|
|
{
|
|
struct ast_datastore *datastore = NULL;
|
|
struct audiohook_volume *audiohook_volume = NULL;
|
|
int *gain = NULL;
|
|
|
|
/* If the audiohook is shutting down don't even bother */
|
|
if (audiohook->status == AST_AUDIOHOOK_STATUS_DONE) {
|
|
return 0;
|
|
}
|
|
|
|
/* Try to find the datastore containg adjustment information, if we can't just bail out */
|
|
if (!(datastore = ast_channel_datastore_find(chan, &audiohook_volume_datastore, NULL))) {
|
|
return 0;
|
|
}
|
|
|
|
audiohook_volume = datastore->data;
|
|
|
|
/* Based on direction grab the appropriate adjustment value */
|
|
if (direction == AST_AUDIOHOOK_DIRECTION_READ) {
|
|
gain = &audiohook_volume->read_adjustment;
|
|
} else if (direction == AST_AUDIOHOOK_DIRECTION_WRITE) {
|
|
gain = &audiohook_volume->write_adjustment;
|
|
}
|
|
|
|
/* If an adjustment value is present modify the frame */
|
|
if (gain && *gain) {
|
|
ast_frame_adjust_volume(frame, *gain);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*! \brief Helper function which finds and optionally creates an audiohook_volume_datastore datastore on a channel
|
|
* \param chan Channel to look on
|
|
* \param create Whether to create the datastore if not found
|
|
* \return Returns audiohook_volume structure on success, NULL on failure
|
|
*/
|
|
static struct audiohook_volume *audiohook_volume_get(struct ast_channel *chan, int create)
|
|
{
|
|
struct ast_datastore *datastore = NULL;
|
|
struct audiohook_volume *audiohook_volume = NULL;
|
|
|
|
/* If we are able to find the datastore return the contents (which is actually an audiohook_volume structure) */
|
|
if ((datastore = ast_channel_datastore_find(chan, &audiohook_volume_datastore, NULL))) {
|
|
return datastore->data;
|
|
}
|
|
|
|
/* If we are not allowed to create a datastore or if we fail to create a datastore, bail out now as we have nothing for them */
|
|
if (!create || !(datastore = ast_channel_datastore_alloc(&audiohook_volume_datastore, NULL))) {
|
|
return NULL;
|
|
}
|
|
|
|
/* Create a new audiohook_volume structure to contain our adjustments and audiohook */
|
|
if (!(audiohook_volume = ast_calloc(1, sizeof(*audiohook_volume)))) {
|
|
ast_channel_datastore_free(datastore);
|
|
return NULL;
|
|
}
|
|
|
|
/* Setup our audiohook structure so we can manipulate the audio */
|
|
ast_audiohook_init(&audiohook_volume->audiohook, AST_AUDIOHOOK_TYPE_MANIPULATE, "Volume");
|
|
audiohook_volume->audiohook.manipulate_callback = audiohook_volume_callback;
|
|
|
|
/* Attach the audiohook_volume blob to the datastore and attach to the channel */
|
|
datastore->data = audiohook_volume;
|
|
ast_channel_datastore_add(chan, datastore);
|
|
|
|
/* All is well... put the audiohook into motion */
|
|
ast_audiohook_attach(chan, &audiohook_volume->audiohook);
|
|
|
|
return audiohook_volume;
|
|
}
|
|
|
|
/*! \brief Adjust the volume on frames read from or written to a channel
|
|
* \param chan Channel to muck with
|
|
* \param direction Direction to set on
|
|
* \param volume Value to adjust the volume by
|
|
* \return Returns 0 on success, -1 on failure
|
|
*/
|
|
int ast_audiohook_volume_set(struct ast_channel *chan, enum ast_audiohook_direction direction, int volume)
|
|
{
|
|
struct audiohook_volume *audiohook_volume = NULL;
|
|
|
|
/* Attempt to find the audiohook volume information, but only create it if we are not setting the adjustment value to zero */
|
|
if (!(audiohook_volume = audiohook_volume_get(chan, (volume ? 1 : 0)))) {
|
|
return -1;
|
|
}
|
|
|
|
/* Now based on the direction set the proper value */
|
|
if (direction == AST_AUDIOHOOK_DIRECTION_READ || direction == AST_AUDIOHOOK_DIRECTION_BOTH) {
|
|
audiohook_volume->read_adjustment = volume;
|
|
} else if (direction == AST_AUDIOHOOK_DIRECTION_WRITE || direction == AST_AUDIOHOOK_DIRECTION_BOTH) {
|
|
audiohook_volume->write_adjustment = volume;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*! \brief Retrieve the volume adjustment value on frames read from or written to a channel
|
|
* \param chan Channel to retrieve volume adjustment from
|
|
* \param direction Direction to retrieve
|
|
* \return Returns adjustment value
|
|
*/
|
|
int ast_audiohook_volume_get(struct ast_channel *chan, enum ast_audiohook_direction direction)
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|
{
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|
struct audiohook_volume *audiohook_volume = NULL;
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int adjustment = 0;
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|
|
|
/* Attempt to find the audiohook volume information, but do not create it as we only want to look at the values */
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if (!(audiohook_volume = audiohook_volume_get(chan, 0))) {
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|
return 0;
|
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}
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|
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|
/* Grab the adjustment value based on direction given */
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|
if (direction == AST_AUDIOHOOK_DIRECTION_READ) {
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|
adjustment = audiohook_volume->read_adjustment;
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} else if (direction == AST_AUDIOHOOK_DIRECTION_WRITE) {
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|
adjustment = audiohook_volume->write_adjustment;
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|
}
|
|
|
|
return adjustment;
|
|
}
|
|
|
|
/*! \brief Adjust the volume on frames read from or written to a channel
|
|
* \param chan Channel to muck with
|
|
* \param direction Direction to increase
|
|
* \param volume Value to adjust the adjustment by
|
|
* \return Returns 0 on success, -1 on failure
|
|
*/
|
|
int ast_audiohook_volume_adjust(struct ast_channel *chan, enum ast_audiohook_direction direction, int volume)
|
|
{
|
|
struct audiohook_volume *audiohook_volume = NULL;
|
|
|
|
/* Attempt to find the audiohook volume information, and create an audiohook if none exists */
|
|
if (!(audiohook_volume = audiohook_volume_get(chan, 1))) {
|
|
return -1;
|
|
}
|
|
|
|
/* Based on the direction change the specific adjustment value */
|
|
if (direction == AST_AUDIOHOOK_DIRECTION_READ || direction == AST_AUDIOHOOK_DIRECTION_BOTH) {
|
|
audiohook_volume->read_adjustment += volume;
|
|
} else if (direction == AST_AUDIOHOOK_DIRECTION_WRITE || direction == AST_AUDIOHOOK_DIRECTION_BOTH) {
|
|
audiohook_volume->write_adjustment += volume;
|
|
}
|
|
|
|
return 0;
|
|
}
|