This permits the list of codecs to be specified in one configuration line, instead of two or more, generally with the aim of either allowing all codecs with the exception of a few or disallowing most but permitting a few. Review: https://reviewboard.asterisk.org/r/1411/ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@334574 65c4cc65-6c06-0410-ace0-fbb531ad65f3
1139 lines
28 KiB
C
1139 lines
28 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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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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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/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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#define SMOOTHER_SIZE 8000
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enum frame_type {
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TYPE_HIGH, /* 0x0 */
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TYPE_LOW, /* 0x1 */
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TYPE_SILENCE, /* 0x2 */
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TYPE_DONTSEND /* 0x3 */
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};
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#define TYPE_MASK 0x3
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struct ast_smoother {
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int size;
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struct ast_format format;
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int flags;
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float samplesperbyte;
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unsigned int opt_needs_swap:1;
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struct ast_frame f;
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struct timeval delivery;
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char data[SMOOTHER_SIZE];
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char framedata[SMOOTHER_SIZE + AST_FRIENDLY_OFFSET];
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struct ast_frame *opt;
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int len;
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};
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struct ast_frame ast_null_frame = { AST_FRAME_NULL, };
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static int smoother_frame_feed(struct ast_smoother *s, struct ast_frame *f, int swap)
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{
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if (s->flags & AST_SMOOTHER_FLAG_G729) {
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if (s->len % 10) {
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ast_log(LOG_NOTICE, "Dropping extra frame of G.729 since we already have a VAD frame at the end\n");
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return 0;
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}
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}
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if (swap) {
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ast_swapcopy_samples(s->data + s->len, f->data.ptr, f->samples);
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} else {
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memcpy(s->data + s->len, f->data.ptr, f->datalen);
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}
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/* If either side is empty, reset the delivery time */
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if (!s->len || ast_tvzero(f->delivery) || ast_tvzero(s->delivery)) { /* XXX really ? */
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s->delivery = f->delivery;
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}
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s->len += f->datalen;
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return 0;
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}
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void ast_smoother_reset(struct ast_smoother *s, int bytes)
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{
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memset(s, 0, sizeof(*s));
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s->size = bytes;
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}
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void ast_smoother_reconfigure(struct ast_smoother *s, int bytes)
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{
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/* if there is no change, then nothing to do */
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if (s->size == bytes) {
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return;
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}
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/* set the new desired output size */
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s->size = bytes;
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/* if there is no 'optimized' frame in the smoother,
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* then there is nothing left to do
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*/
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if (!s->opt) {
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return;
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}
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/* there is an 'optimized' frame here at the old size,
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* but it must now be put into the buffer so the data
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* can be extracted at the new size
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*/
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smoother_frame_feed(s, s->opt, s->opt_needs_swap);
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s->opt = NULL;
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}
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struct ast_smoother *ast_smoother_new(int size)
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{
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struct ast_smoother *s;
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if (size < 1)
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return NULL;
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if ((s = ast_malloc(sizeof(*s))))
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ast_smoother_reset(s, size);
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return s;
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}
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int ast_smoother_get_flags(struct ast_smoother *s)
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{
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return s->flags;
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}
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void ast_smoother_set_flags(struct ast_smoother *s, int flags)
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{
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s->flags = flags;
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}
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int ast_smoother_test_flag(struct ast_smoother *s, int flag)
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{
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return (s->flags & flag);
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}
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int __ast_smoother_feed(struct ast_smoother *s, struct ast_frame *f, int swap)
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{
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if (f->frametype != AST_FRAME_VOICE) {
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ast_log(LOG_WARNING, "Huh? Can't smooth a non-voice frame!\n");
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return -1;
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}
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if (!s->format.id) {
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ast_format_copy(&s->format, &f->subclass.format);
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s->samplesperbyte = (float)f->samples / (float)f->datalen;
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} else if (ast_format_cmp(&s->format, &f->subclass.format) == AST_FORMAT_CMP_NOT_EQUAL) {
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ast_log(LOG_WARNING, "Smoother was working on %s format frames, now trying to feed %s?\n",
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ast_getformatname(&s->format), ast_getformatname(&f->subclass.format));
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return -1;
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}
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if (s->len + f->datalen > SMOOTHER_SIZE) {
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ast_log(LOG_WARNING, "Out of smoother space\n");
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return -1;
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}
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if (((f->datalen == s->size) ||
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((f->datalen < 10) && (s->flags & AST_SMOOTHER_FLAG_G729))) &&
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!s->opt &&
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!s->len &&
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(f->offset >= AST_MIN_OFFSET)) {
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/* Optimize by sending the frame we just got
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on the next read, thus eliminating the douple
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copy */
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if (swap)
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ast_swapcopy_samples(f->data.ptr, f->data.ptr, f->samples);
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s->opt = f;
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s->opt_needs_swap = swap ? 1 : 0;
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return 0;
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}
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return smoother_frame_feed(s, f, swap);
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}
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struct ast_frame *ast_smoother_read(struct ast_smoother *s)
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{
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struct ast_frame *opt;
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int len;
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/* IF we have an optimization frame, send it */
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if (s->opt) {
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if (s->opt->offset < AST_FRIENDLY_OFFSET)
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ast_log(LOG_WARNING, "Returning a frame of inappropriate offset (%d).\n",
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s->opt->offset);
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opt = s->opt;
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s->opt = NULL;
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return opt;
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}
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/* Make sure we have enough data */
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if (s->len < s->size) {
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/* Or, if this is a G.729 frame with VAD on it, send it immediately anyway */
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if (!((s->flags & AST_SMOOTHER_FLAG_G729) && (s->len % 10)))
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return NULL;
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}
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len = s->size;
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if (len > s->len)
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len = s->len;
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/* Make frame */
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s->f.frametype = AST_FRAME_VOICE;
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ast_format_copy(&s->f.subclass.format, &s->format);
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s->f.data.ptr = s->framedata + AST_FRIENDLY_OFFSET;
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s->f.offset = AST_FRIENDLY_OFFSET;
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s->f.datalen = len;
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/* Samples will be improper given VAD, but with VAD the concept really doesn't even exist */
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s->f.samples = len * s->samplesperbyte; /* XXX rounding */
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s->f.delivery = s->delivery;
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/* Fill Data */
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memcpy(s->f.data.ptr, s->data, len);
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s->len -= len;
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/* Move remaining data to the front if applicable */
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if (s->len) {
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/* In principle this should all be fine because if we are sending
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G.729 VAD, the next timestamp will take over anyawy */
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memmove(s->data, s->data + len, s->len);
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if (!ast_tvzero(s->delivery)) {
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/* If we have delivery time, increment it, otherwise, leave it at 0 */
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s->delivery = ast_tvadd(s->delivery, ast_samp2tv(s->f.samples, ast_format_rate(&s->format)));
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}
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}
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/* Return frame */
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return &s->f;
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}
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void ast_smoother_free(struct ast_smoother *s)
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{
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ast_free(s);
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}
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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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f->mallocd = AST_MALLOCD_HDR;
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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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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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if (fr->mallocd & AST_MALLOCD_SRC) {
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if (fr->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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ast_free(fr);
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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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/*!
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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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ast_format_copy(&out->subclass.format, &fr->subclass.format);
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out->datalen = fr->datalen;
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out->samples = fr->samples;
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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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} else {
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out = fr;
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}
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if (!(fr->mallocd & AST_MALLOCD_SRC) && fr->src) {
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if (!(out->src = ast_strdup(fr->src))) {
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if (out != fr) {
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ast_free(out);
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}
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return NULL;
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}
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} else {
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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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}
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if (!(fr->mallocd & AST_MALLOCD_DATA)) {
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if (!fr->datalen) {
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out->data.uint32 = fr->data.uint32;
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out->mallocd = AST_MALLOCD_HDR | AST_MALLOCD_SRC;
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return out;
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}
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if (!(newdata = ast_malloc(fr->datalen + AST_FRIENDLY_OFFSET))) {
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if (out->src != fr->src) {
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ast_free((void *) out->src);
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}
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if (out != fr) {
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ast_free(out);
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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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out->datalen = fr->datalen;
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memcpy(newdata, fr->data.ptr, fr->datalen);
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out->data.ptr = newdata;
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} else {
|
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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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}
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|
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out->mallocd = AST_MALLOCD_HDR | AST_MALLOCD_SRC | AST_MALLOCD_DATA;
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|
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return out;
|
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}
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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;
|
|
|
|
#if !defined(LOW_MEMORY)
|
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struct ast_frame_cache *frames;
|
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#endif
|
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|
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/* Start with standard stuff */
|
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len = sizeof(*out) + AST_FRIENDLY_OFFSET + f->datalen;
|
|
/* If we have a source, add space for it */
|
|
/*
|
|
* XXX Watch out here - if we receive a src which is not terminated
|
|
* properly, we can be easily attacked. Should limit the size we deal with.
|
|
*/
|
|
if (f->src)
|
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srclen = strlen(f->src);
|
|
if (srclen > 0)
|
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len += srclen + 1;
|
|
|
|
#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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|
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AST_LIST_REMOVE_CURRENT(frame_list);
|
|
memset(out, 0, sizeof(*out));
|
|
out->mallocd_hdr_len = mallocd_len;
|
|
buf = out;
|
|
frames->size--;
|
|
break;
|
|
}
|
|
}
|
|
AST_LIST_TRAVERSE_SAFE_END;
|
|
}
|
|
#endif
|
|
|
|
if (!buf) {
|
|
if (!(buf = ast_calloc_cache(1, len)))
|
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return NULL;
|
|
out = buf;
|
|
out->mallocd_hdr_len = len;
|
|
}
|
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|
|
out->frametype = f->frametype;
|
|
ast_format_copy(&out->subclass.format, &f->subclass.format);
|
|
out->datalen = f->datalen;
|
|
out->samples = f->samples;
|
|
out->delivery = f->delivery;
|
|
/* Set us as having malloc'd header only, so it will eventually
|
|
get freed. */
|
|
out->mallocd = AST_MALLOCD_HDR;
|
|
out->offset = AST_FRIENDLY_OFFSET;
|
|
if (out->datalen) {
|
|
out->data.ptr = buf + sizeof(*out) + AST_FRIENDLY_OFFSET;
|
|
memcpy(out->data.ptr, f->data.ptr, out->datalen);
|
|
} else {
|
|
out->data.uint32 = f->data.uint32;
|
|
}
|
|
if (srclen > 0) {
|
|
/* This may seem a little strange, but it's to avoid a gcc (4.2.4) compiler warning */
|
|
char *src;
|
|
out->src = buf + sizeof(*out) + AST_FRIENDLY_OFFSET + f->datalen;
|
|
src = (char *) out->src;
|
|
/* Must have space since we allocated for it */
|
|
strcpy(src, f->src);
|
|
}
|
|
ast_copy_flags(out, f, AST_FLAGS_ALL);
|
|
out->ts = f->ts;
|
|
out->len = f->len;
|
|
out->seqno = f->seqno;
|
|
return out;
|
|
}
|
|
|
|
void ast_swapcopy_samples(void *dst, const void *src, int samples)
|
|
{
|
|
int i;
|
|
unsigned short *dst_s = dst;
|
|
const unsigned short *src_s = src;
|
|
|
|
for (i = 0; i < samples; i++)
|
|
dst_s[i] = (src_s[i]<<8) | (src_s[i]>>8);
|
|
}
|
|
|
|
/*! 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];
|
|
const char *message = "Unknown";
|
|
|
|
if (!name)
|
|
name = noname;
|
|
|
|
|
|
if (!f) {
|
|
ast_verbose("%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;
|
|
switch(f->frametype) {
|
|
case AST_FRAME_DTMF_BEGIN:
|
|
strcpy(ftype, "DTMF Begin");
|
|
subclass[0] = f->subclass.integer;
|
|
subclass[1] = '\0';
|
|
break;
|
|
case AST_FRAME_DTMF_END:
|
|
strcpy(ftype, "DTMF End");
|
|
subclass[0] = f->subclass.integer;
|
|
subclass[1] = '\0';
|
|
break;
|
|
case AST_FRAME_CONTROL:
|
|
strcpy(ftype, "Control");
|
|
switch (f->subclass.integer) {
|
|
case AST_CONTROL_HANGUP:
|
|
strcpy(subclass, "Hangup");
|
|
break;
|
|
case AST_CONTROL_RING:
|
|
strcpy(subclass, "Ring");
|
|
break;
|
|
case AST_CONTROL_RINGING:
|
|
strcpy(subclass, "Ringing");
|
|
break;
|
|
case AST_CONTROL_ANSWER:
|
|
strcpy(subclass, "Answer");
|
|
break;
|
|
case AST_CONTROL_BUSY:
|
|
strcpy(subclass, "Busy");
|
|
break;
|
|
case AST_CONTROL_TAKEOFFHOOK:
|
|
strcpy(subclass, "Take Off Hook");
|
|
break;
|
|
case AST_CONTROL_OFFHOOK:
|
|
strcpy(subclass, "Line Off Hook");
|
|
break;
|
|
case AST_CONTROL_CONGESTION:
|
|
strcpy(subclass, "Congestion");
|
|
break;
|
|
case AST_CONTROL_FLASH:
|
|
strcpy(subclass, "Flash");
|
|
break;
|
|
case AST_CONTROL_WINK:
|
|
strcpy(subclass, "Wink");
|
|
break;
|
|
case AST_CONTROL_OPTION:
|
|
strcpy(subclass, "Option");
|
|
break;
|
|
case AST_CONTROL_RADIO_KEY:
|
|
strcpy(subclass, "Key Radio");
|
|
break;
|
|
case AST_CONTROL_RADIO_UNKEY:
|
|
strcpy(subclass, "Unkey Radio");
|
|
break;
|
|
case AST_CONTROL_HOLD:
|
|
strcpy(subclass, "Hold");
|
|
break;
|
|
case AST_CONTROL_UNHOLD:
|
|
strcpy(subclass, "Unhold");
|
|
break;
|
|
case AST_CONTROL_T38_PARAMETERS:
|
|
if (f->datalen != sizeof(struct ast_control_t38_parameters)) {
|
|
message = "Invalid";
|
|
} else {
|
|
struct ast_control_t38_parameters *parameters = f->data.ptr;
|
|
enum ast_control_t38 state = parameters->request_response;
|
|
if (state == AST_T38_REQUEST_NEGOTIATE)
|
|
message = "Negotiation Requested";
|
|
else if (state == AST_T38_REQUEST_TERMINATE)
|
|
message = "Negotiation Request Terminated";
|
|
else if (state == AST_T38_NEGOTIATED)
|
|
message = "Negotiated";
|
|
else if (state == AST_T38_TERMINATED)
|
|
message = "Terminated";
|
|
else if (state == AST_T38_REFUSED)
|
|
message = "Refused";
|
|
}
|
|
snprintf(subclass, sizeof(subclass), "T38_Parameters/%s", message);
|
|
break;
|
|
case -1:
|
|
strcpy(subclass, "Stop generators");
|
|
break;
|
|
default:
|
|
snprintf(subclass, sizeof(subclass), "Unknown control '%d'", f->subclass.integer);
|
|
}
|
|
break;
|
|
case AST_FRAME_NULL:
|
|
strcpy(ftype, "Null Frame");
|
|
strcpy(subclass, "N/A");
|
|
break;
|
|
case AST_FRAME_IAX:
|
|
/* Should never happen */
|
|
strcpy(ftype, "IAX Specific");
|
|
snprintf(subclass, sizeof(subclass), "IAX Frametype %d", f->subclass.integer);
|
|
break;
|
|
case AST_FRAME_TEXT:
|
|
strcpy(ftype, "Text");
|
|
strcpy(subclass, "N/A");
|
|
ast_copy_string(moreinfo, f->data.ptr, sizeof(moreinfo));
|
|
break;
|
|
case AST_FRAME_IMAGE:
|
|
strcpy(ftype, "Image");
|
|
snprintf(subclass, sizeof(subclass), "Image format %s\n", ast_getformatname(&f->subclass.format));
|
|
break;
|
|
case AST_FRAME_HTML:
|
|
strcpy(ftype, "HTML");
|
|
switch (f->subclass.integer) {
|
|
case AST_HTML_URL:
|
|
strcpy(subclass, "URL");
|
|
ast_copy_string(moreinfo, f->data.ptr, sizeof(moreinfo));
|
|
break;
|
|
case AST_HTML_DATA:
|
|
strcpy(subclass, "Data");
|
|
break;
|
|
case AST_HTML_BEGIN:
|
|
strcpy(subclass, "Begin");
|
|
break;
|
|
case AST_HTML_END:
|
|
strcpy(subclass, "End");
|
|
break;
|
|
case AST_HTML_LDCOMPLETE:
|
|
strcpy(subclass, "Load Complete");
|
|
break;
|
|
case AST_HTML_NOSUPPORT:
|
|
strcpy(subclass, "No Support");
|
|
break;
|
|
case AST_HTML_LINKURL:
|
|
strcpy(subclass, "Link URL");
|
|
ast_copy_string(moreinfo, f->data.ptr, sizeof(moreinfo));
|
|
break;
|
|
case AST_HTML_UNLINK:
|
|
strcpy(subclass, "Unlink");
|
|
break;
|
|
case AST_HTML_LINKREJECT:
|
|
strcpy(subclass, "Link Reject");
|
|
break;
|
|
default:
|
|
snprintf(subclass, sizeof(subclass), "Unknown HTML frame '%d'\n", f->subclass.integer);
|
|
break;
|
|
}
|
|
break;
|
|
case AST_FRAME_MODEM:
|
|
strcpy(ftype, "Modem");
|
|
switch (f->subclass.integer) {
|
|
case AST_MODEM_T38:
|
|
strcpy(subclass, "T.38");
|
|
break;
|
|
case AST_MODEM_V150:
|
|
strcpy(subclass, "V.150");
|
|
break;
|
|
default:
|
|
snprintf(subclass, sizeof(subclass), "Unknown MODEM frame '%d'\n", f->subclass.integer);
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
snprintf(ftype, sizeof(ftype), "Unknown Frametype '%d'", f->frametype);
|
|
}
|
|
if (!ast_strlen_zero(moreinfo))
|
|
ast_verbose("%s [ TYPE: %s (%d) 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_verbose("%s [ TYPE: %s (%d) 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_parse_allow_disallow(struct ast_codec_pref *pref, struct ast_format_cap *cap, const char *list, int allowing)
|
|
{
|
|
int errors = 0, framems = 0, all = 0, iter_allowing;
|
|
char *parse = NULL, *this = NULL, *psize = NULL;
|
|
struct ast_format format;
|
|
|
|
parse = ast_strdupa(list);
|
|
while ((this = strsep(&parse, ","))) {
|
|
iter_allowing = allowing;
|
|
framems = 0;
|
|
if (*this == '!') {
|
|
this++;
|
|
iter_allowing = !allowing;
|
|
}
|
|
if ((psize = strrchr(this, ':'))) {
|
|
*psize++ = '\0';
|
|
ast_debug(1, "Packetization for codec: %s is %s\n", this, psize);
|
|
framems = atoi(psize);
|
|
if (framems < 0) {
|
|
framems = 0;
|
|
errors++;
|
|
ast_log(LOG_WARNING, "Bad packetization value for codec %s\n", this);
|
|
}
|
|
}
|
|
all = strcasecmp(this, "all") ? 0 : 1;
|
|
|
|
if (!all && !ast_getformatbyname(this, &format)) {
|
|
ast_log(LOG_WARNING, "Cannot %s unknown format '%s'\n", iter_allowing ? "allow" : "disallow", this);
|
|
errors++;
|
|
continue;
|
|
}
|
|
|
|
if (cap) {
|
|
if (iter_allowing) {
|
|
if (all) {
|
|
ast_format_cap_add_all(cap);
|
|
} else {
|
|
ast_format_cap_add(cap, &format);
|
|
}
|
|
} else {
|
|
if (all) {
|
|
ast_format_cap_remove_all(cap);
|
|
} else {
|
|
ast_format_cap_remove(cap, &format);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (pref) {
|
|
if (!all) {
|
|
if (iter_allowing) {
|
|
ast_codec_pref_append(pref, &format);
|
|
ast_codec_pref_setsize(pref, &format, framems);
|
|
} else {
|
|
ast_codec_pref_remove(pref, &format);
|
|
}
|
|
} else if (!iter_allowing) {
|
|
memset(pref, 0, sizeof(*pref));
|
|
}
|
|
}
|
|
}
|
|
return errors;
|
|
}
|
|
|
|
static int g723_len(unsigned char buf)
|
|
{
|
|
enum frame_type type = buf & TYPE_MASK;
|
|
|
|
switch(type) {
|
|
case TYPE_DONTSEND:
|
|
return 0;
|
|
break;
|
|
case TYPE_SILENCE:
|
|
return 4;
|
|
break;
|
|
case TYPE_HIGH:
|
|
return 24;
|
|
break;
|
|
case TYPE_LOW:
|
|
return 20;
|
|
break;
|
|
default:
|
|
ast_log(LOG_WARNING, "Badly encoded frame (%d)\n", type);
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static int g723_samples(unsigned char *buf, int maxlen)
|
|
{
|
|
int pos = 0;
|
|
int samples = 0;
|
|
int res;
|
|
while(pos < maxlen) {
|
|
res = g723_len(buf[pos]);
|
|
if (res <= 0)
|
|
break;
|
|
samples += 240;
|
|
pos += res;
|
|
}
|
|
return samples;
|
|
}
|
|
|
|
static unsigned char get_n_bits_at(unsigned char *data, int n, int bit)
|
|
{
|
|
int byte = bit / 8; /* byte containing first bit */
|
|
int rem = 8 - (bit % 8); /* remaining bits in first byte */
|
|
unsigned char ret = 0;
|
|
|
|
if (n <= 0 || n > 8)
|
|
return 0;
|
|
|
|
if (rem < n) {
|
|
ret = (data[byte] << (n - rem));
|
|
ret |= (data[byte + 1] >> (8 - n + rem));
|
|
} else {
|
|
ret = (data[byte] >> (rem - n));
|
|
}
|
|
|
|
return (ret & (0xff >> (8 - n)));
|
|
}
|
|
|
|
static int speex_get_wb_sz_at(unsigned char *data, int len, int bit)
|
|
{
|
|
static const int SpeexWBSubModeSz[] = {
|
|
4, 36, 112, 192,
|
|
352, 0, 0, 0 };
|
|
int off = bit;
|
|
unsigned char c;
|
|
|
|
/* skip up to two wideband frames */
|
|
if (((len * 8 - off) >= 5) &&
|
|
get_n_bits_at(data, 1, off)) {
|
|
c = get_n_bits_at(data, 3, off + 1);
|
|
off += SpeexWBSubModeSz[c];
|
|
|
|
if (((len * 8 - off) >= 5) &&
|
|
get_n_bits_at(data, 1, off)) {
|
|
c = get_n_bits_at(data, 3, off + 1);
|
|
off += SpeexWBSubModeSz[c];
|
|
|
|
if (((len * 8 - off) >= 5) &&
|
|
get_n_bits_at(data, 1, off)) {
|
|
ast_log(LOG_WARNING, "Encountered corrupt speex frame; too many wideband frames in a row.\n");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
}
|
|
return off - bit;
|
|
}
|
|
|
|
static int speex_samples(unsigned char *data, int len)
|
|
{
|
|
static const int SpeexSubModeSz[] = {
|
|
5, 43, 119, 160,
|
|
220, 300, 364, 492,
|
|
79, 0, 0, 0,
|
|
0, 0, 0, 0 };
|
|
static const int SpeexInBandSz[] = {
|
|
1, 1, 4, 4,
|
|
4, 4, 4, 4,
|
|
8, 8, 16, 16,
|
|
32, 32, 64, 64 };
|
|
int bit = 0;
|
|
int cnt = 0;
|
|
int off;
|
|
unsigned char c;
|
|
|
|
while ((len * 8 - bit) >= 5) {
|
|
/* skip wideband frames */
|
|
off = speex_get_wb_sz_at(data, len, bit);
|
|
if (off < 0) {
|
|
ast_log(LOG_WARNING, "Had error while reading wideband frames for speex samples\n");
|
|
break;
|
|
}
|
|
bit += off;
|
|
|
|
if ((len * 8 - bit) < 5)
|
|
break;
|
|
|
|
/* get control bits */
|
|
c = get_n_bits_at(data, 5, bit);
|
|
bit += 5;
|
|
|
|
if (c == 15) {
|
|
/* terminator */
|
|
break;
|
|
} else if (c == 14) {
|
|
/* in-band signal; next 4 bits contain signal id */
|
|
c = get_n_bits_at(data, 4, bit);
|
|
bit += 4;
|
|
bit += SpeexInBandSz[c];
|
|
} else if (c == 13) {
|
|
/* user in-band; next 4 bits contain msg len */
|
|
c = get_n_bits_at(data, 4, bit);
|
|
bit += 4;
|
|
/* after which it's 5-bit signal id + c bytes of data */
|
|
bit += 5 + c * 8;
|
|
} else if (c > 8) {
|
|
/* unknown */
|
|
ast_log(LOG_WARNING, "Unknown speex control frame %d\n", c);
|
|
break;
|
|
} else {
|
|
/* skip number bits for submode (less the 5 control bits) */
|
|
bit += SpeexSubModeSz[c] - 5;
|
|
cnt += 160; /* new frame */
|
|
}
|
|
}
|
|
return cnt;
|
|
}
|
|
|
|
int ast_codec_get_samples(struct ast_frame *f)
|
|
{
|
|
int samples = 0;
|
|
|
|
switch (f->subclass.format.id) {
|
|
case AST_FORMAT_SPEEX:
|
|
samples = speex_samples(f->data.ptr, f->datalen);
|
|
break;
|
|
case AST_FORMAT_SPEEX16:
|
|
samples = 2 * speex_samples(f->data.ptr, f->datalen);
|
|
break;
|
|
case AST_FORMAT_SPEEX32:
|
|
samples = 4 * speex_samples(f->data.ptr, f->datalen);
|
|
break;
|
|
case AST_FORMAT_G723_1:
|
|
samples = g723_samples(f->data.ptr, f->datalen);
|
|
break;
|
|
case AST_FORMAT_ILBC:
|
|
samples = 240 * (f->datalen / 50);
|
|
break;
|
|
case AST_FORMAT_GSM:
|
|
samples = 160 * (f->datalen / 33);
|
|
break;
|
|
case AST_FORMAT_G729A:
|
|
samples = f->datalen * 8;
|
|
break;
|
|
case AST_FORMAT_SLINEAR:
|
|
case AST_FORMAT_SLINEAR16:
|
|
samples = f->datalen / 2;
|
|
break;
|
|
case AST_FORMAT_LPC10:
|
|
/* assumes that the RTP packet contains one LPC10 frame */
|
|
samples = 22 * 8;
|
|
samples += (((char *)(f->data.ptr))[7] & 0x1) * 8;
|
|
break;
|
|
case AST_FORMAT_ULAW:
|
|
case AST_FORMAT_ALAW:
|
|
case AST_FORMAT_TESTLAW:
|
|
samples = f->datalen;
|
|
break;
|
|
case AST_FORMAT_G722:
|
|
case AST_FORMAT_ADPCM:
|
|
case AST_FORMAT_G726:
|
|
case AST_FORMAT_G726_AAL2:
|
|
samples = f->datalen * 2;
|
|
break;
|
|
case AST_FORMAT_SIREN7:
|
|
/* 16,000 samples per second at 32kbps is 4,000 bytes per second */
|
|
samples = f->datalen * (16000 / 4000);
|
|
break;
|
|
case AST_FORMAT_SIREN14:
|
|
/* 32,000 samples per second at 48kbps is 6,000 bytes per second */
|
|
samples = (int) f->datalen * ((float) 32000 / 6000);
|
|
break;
|
|
case AST_FORMAT_G719:
|
|
/* 48,000 samples per second at 64kbps is 8,000 bytes per second */
|
|
samples = (int) f->datalen * ((float) 48000 / 8000);
|
|
break;
|
|
case AST_FORMAT_SILK:
|
|
if (!(ast_format_isset(&f->subclass.format,
|
|
SILK_ATTR_KEY_SAMP_RATE,
|
|
SILK_ATTR_VAL_SAMP_24KHZ,
|
|
AST_FORMAT_ATTR_END))) {
|
|
return 480;
|
|
} else if (!(ast_format_isset(&f->subclass.format,
|
|
SILK_ATTR_KEY_SAMP_RATE,
|
|
SILK_ATTR_VAL_SAMP_16KHZ,
|
|
AST_FORMAT_ATTR_END))) {
|
|
return 320;
|
|
} else if (!(ast_format_isset(&f->subclass.format,
|
|
SILK_ATTR_KEY_SAMP_RATE,
|
|
SILK_ATTR_VAL_SAMP_12KHZ,
|
|
AST_FORMAT_ATTR_END))) {
|
|
return 240;
|
|
} else {
|
|
return 160;
|
|
}
|
|
case AST_FORMAT_CELT:
|
|
/* TODO The assumes 20ms delivery right now, which is incorrect */
|
|
samples = ast_format_rate(&f->subclass.format) / 50;
|
|
break;
|
|
default:
|
|
ast_log(LOG_WARNING, "Unable to calculate samples for format %s\n", ast_getformatname(&f->subclass.format));
|
|
}
|
|
return samples;
|
|
}
|
|
|
|
int ast_codec_get_len(struct ast_format *format, int samples)
|
|
{
|
|
int len = 0;
|
|
|
|
/* XXX Still need speex, and lpc10 XXX */
|
|
switch(format->id) {
|
|
case AST_FORMAT_G723_1:
|
|
len = (samples / 240) * 20;
|
|
break;
|
|
case AST_FORMAT_ILBC:
|
|
len = (samples / 240) * 50;
|
|
break;
|
|
case AST_FORMAT_GSM:
|
|
len = (samples / 160) * 33;
|
|
break;
|
|
case AST_FORMAT_G729A:
|
|
len = samples / 8;
|
|
break;
|
|
case AST_FORMAT_SLINEAR:
|
|
case AST_FORMAT_SLINEAR16:
|
|
len = samples * 2;
|
|
break;
|
|
case AST_FORMAT_ULAW:
|
|
case AST_FORMAT_ALAW:
|
|
case AST_FORMAT_TESTLAW:
|
|
len = samples;
|
|
break;
|
|
case AST_FORMAT_G722:
|
|
case AST_FORMAT_ADPCM:
|
|
case AST_FORMAT_G726:
|
|
case AST_FORMAT_G726_AAL2:
|
|
len = samples / 2;
|
|
break;
|
|
case AST_FORMAT_SIREN7:
|
|
/* 16,000 samples per second at 32kbps is 4,000 bytes per second */
|
|
len = samples / (16000 / 4000);
|
|
break;
|
|
case AST_FORMAT_SIREN14:
|
|
/* 32,000 samples per second at 48kbps is 6,000 bytes per second */
|
|
len = (int) samples / ((float) 32000 / 6000);
|
|
break;
|
|
case AST_FORMAT_G719:
|
|
/* 48,000 samples per second at 64kbps is 8,000 bytes per second */
|
|
len = (int) samples / ((float) 48000 / 8000);
|
|
break;
|
|
default:
|
|
ast_log(LOG_WARNING, "Unable to calculate sample length for format %s\n", ast_getformatname(format));
|
|
}
|
|
|
|
return len;
|
|
}
|
|
|
|
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_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) || (f1->subclass.format.id != AST_FORMAT_SLINEAR))
|
|
return -1;
|
|
|
|
if ((f2->frametype != AST_FRAME_VOICE) || (f2->subclass.format.id != AST_FORMAT_SLINEAR))
|
|
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;
|
|
}
|