........ Merged revisions 370429 from http://svn.asterisk.org/svn/asterisk/branches/1.8 ........ Merged revisions 370430 from http://svn.asterisk.org/svn/asterisk/branches/10 git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@370431 65c4cc65-6c06-0410-ace0-fbb531ad65f3
1202 lines
30 KiB
C
1202 lines
30 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Frame and codec manipulation routines
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*
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* \author Mark Spencer <markster@digium.com>
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*/
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/*** MODULEINFO
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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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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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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struct ast_frame *ast_frdup(const struct ast_frame *f)
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{
|
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struct ast_frame *out = NULL;
|
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int len, srclen = 0;
|
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void *buf = NULL;
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|
|
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#if !defined(LOW_MEMORY)
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struct ast_frame_cache *frames;
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#endif
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|
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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 */
|
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/*
|
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* 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.
|
|
*/
|
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if (f->src)
|
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srclen = strlen(f->src);
|
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if (srclen > 0)
|
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len += srclen + 1;
|
|
|
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#if !defined(LOW_MEMORY)
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if ((frames = ast_threadstorage_get(&frame_cache, sizeof(*frames)))) {
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AST_LIST_TRAVERSE_SAFE_BEGIN(&frames->list, out, frame_list) {
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if (out->mallocd_hdr_len >= len) {
|
|
size_t mallocd_len = out->mallocd_hdr_len;
|
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|
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AST_LIST_REMOVE_CURRENT(frame_list);
|
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memset(out, 0, sizeof(*out));
|
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out->mallocd_hdr_len = mallocd_len;
|
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buf = out;
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frames->size--;
|
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break;
|
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}
|
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}
|
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AST_LIST_TRAVERSE_SAFE_END;
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}
|
|
#endif
|
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|
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if (!buf) {
|
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if (!(buf = ast_calloc_cache(1, len)))
|
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return NULL;
|
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out = buf;
|
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out->mallocd_hdr_len = len;
|
|
}
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|
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out->frametype = f->frametype;
|
|
ast_format_copy(&out->subclass.format, &f->subclass.format);
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out->datalen = f->datalen;
|
|
out->samples = f->samples;
|
|
out->delivery = f->delivery;
|
|
/* Even though this new frame was allocated from the heap, we can't mark it
|
|
* with AST_MALLOCD_HDR, AST_MALLOCD_DATA and AST_MALLOCD_SRC, because that
|
|
* would cause ast_frfree() to attempt to individually free each of those
|
|
* under the assumption that they were separately allocated. Since this frame
|
|
* was allocated in a single allocation, we'll only mark it as if the header
|
|
* was heap-allocated; this will result in the entire frame being properly freed.
|
|
*/
|
|
out->mallocd = AST_MALLOCD_HDR;
|
|
out->offset = AST_FRIENDLY_OFFSET;
|
|
if (out->datalen) {
|
|
out->data.ptr = buf + sizeof(*out) + AST_FRIENDLY_OFFSET;
|
|
memcpy(out->data.ptr, f->data.ptr, out->datalen);
|
|
} else {
|
|
out->data.uint32 = f->data.uint32;
|
|
}
|
|
if (srclen > 0) {
|
|
/* This may seem a little strange, but it's to avoid a gcc (4.2.4) compiler warning */
|
|
char *src;
|
|
out->src = buf + sizeof(*out) + AST_FRIENDLY_OFFSET + f->datalen;
|
|
src = (char *) out->src;
|
|
/* Must have space since we allocated for it */
|
|
strcpy(src, f->src);
|
|
}
|
|
ast_copy_flags(out, f, AST_FLAGS_ALL);
|
|
out->ts = f->ts;
|
|
out->len = f->len;
|
|
out->seqno = f->seqno;
|
|
return out;
|
|
}
|
|
|
|
void ast_swapcopy_samples(void *dst, const void *src, int samples)
|
|
{
|
|
int i;
|
|
unsigned short *dst_s = dst;
|
|
const unsigned short *src_s = src;
|
|
|
|
for (i = 0; i < samples; i++)
|
|
dst_s[i] = (src_s[i]<<8) | (src_s[i]>>8);
|
|
}
|
|
|
|
void ast_frame_subclass2str(struct ast_frame *f, char *subclass, size_t slen, char *moreinfo, size_t mlen)
|
|
{
|
|
switch(f->frametype) {
|
|
case AST_FRAME_DTMF_BEGIN:
|
|
if (slen > 1) {
|
|
subclass[0] = f->subclass.integer;
|
|
subclass[1] = '\0';
|
|
}
|
|
break;
|
|
case AST_FRAME_DTMF_END:
|
|
if (slen > 1) {
|
|
subclass[0] = f->subclass.integer;
|
|
subclass[1] = '\0';
|
|
}
|
|
break;
|
|
case AST_FRAME_CONTROL:
|
|
switch (f->subclass.integer) {
|
|
case AST_CONTROL_HANGUP:
|
|
ast_copy_string(subclass, "Hangup", slen);
|
|
break;
|
|
case AST_CONTROL_RING:
|
|
ast_copy_string(subclass, "Ring", slen);
|
|
break;
|
|
case AST_CONTROL_RINGING:
|
|
ast_copy_string(subclass, "Ringing", slen);
|
|
break;
|
|
case AST_CONTROL_ANSWER:
|
|
ast_copy_string(subclass, "Answer", slen);
|
|
break;
|
|
case AST_CONTROL_BUSY:
|
|
ast_copy_string(subclass, "Busy", slen);
|
|
break;
|
|
case AST_CONTROL_TAKEOFFHOOK:
|
|
ast_copy_string(subclass, "Take Off Hook", slen);
|
|
break;
|
|
case AST_CONTROL_OFFHOOK:
|
|
ast_copy_string(subclass, "Line Off Hook", slen);
|
|
break;
|
|
case AST_CONTROL_CONGESTION:
|
|
ast_copy_string(subclass, "Congestion", slen);
|
|
break;
|
|
case AST_CONTROL_FLASH:
|
|
ast_copy_string(subclass, "Flash", slen);
|
|
break;
|
|
case AST_CONTROL_WINK:
|
|
ast_copy_string(subclass, "Wink", slen);
|
|
break;
|
|
case AST_CONTROL_OPTION:
|
|
ast_copy_string(subclass, "Option", slen);
|
|
break;
|
|
case AST_CONTROL_RADIO_KEY:
|
|
ast_copy_string(subclass, "Key Radio", slen);
|
|
break;
|
|
case AST_CONTROL_RADIO_UNKEY:
|
|
ast_copy_string(subclass, "Unkey Radio", slen);
|
|
break;
|
|
case AST_CONTROL_HOLD:
|
|
ast_copy_string(subclass, "Hold", slen);
|
|
break;
|
|
case AST_CONTROL_UNHOLD:
|
|
ast_copy_string(subclass, "Unhold", slen);
|
|
break;
|
|
case AST_CONTROL_T38_PARAMETERS: {
|
|
char *message = "Unknown";
|
|
if (f->datalen != sizeof(struct ast_control_t38_parameters)) {
|
|
message = "Invalid";
|
|
} else {
|
|
struct ast_control_t38_parameters *parameters = f->data.ptr;
|
|
enum ast_control_t38 state = parameters->request_response;
|
|
if (state == AST_T38_REQUEST_NEGOTIATE)
|
|
message = "Negotiation Requested";
|
|
else if (state == AST_T38_REQUEST_TERMINATE)
|
|
message = "Negotiation Request Terminated";
|
|
else if (state == AST_T38_NEGOTIATED)
|
|
message = "Negotiated";
|
|
else if (state == AST_T38_TERMINATED)
|
|
message = "Terminated";
|
|
else if (state == AST_T38_REFUSED)
|
|
message = "Refused";
|
|
}
|
|
snprintf(subclass, slen, "T38_Parameters/%s", message);
|
|
break;
|
|
}
|
|
case -1:
|
|
ast_copy_string(subclass, "Stop generators", slen);
|
|
break;
|
|
default:
|
|
snprintf(subclass, slen, "Unknown control '%d'", f->subclass.integer);
|
|
}
|
|
break;
|
|
case AST_FRAME_NULL:
|
|
ast_copy_string(subclass, "N/A", slen);
|
|
break;
|
|
case AST_FRAME_IAX:
|
|
/* Should never happen */
|
|
snprintf(subclass, slen, "IAX Frametype %d", f->subclass.integer);
|
|
break;
|
|
case AST_FRAME_TEXT:
|
|
ast_copy_string(subclass, "N/A", slen);
|
|
if (moreinfo) {
|
|
ast_copy_string(moreinfo, f->data.ptr, mlen);
|
|
}
|
|
break;
|
|
case AST_FRAME_IMAGE:
|
|
snprintf(subclass, slen, "Image format %s\n", ast_getformatname(&f->subclass.format));
|
|
break;
|
|
case AST_FRAME_HTML:
|
|
switch (f->subclass.integer) {
|
|
case AST_HTML_URL:
|
|
ast_copy_string(subclass, "URL", slen);
|
|
if (moreinfo) {
|
|
ast_copy_string(moreinfo, f->data.ptr, mlen);
|
|
}
|
|
break;
|
|
case AST_HTML_DATA:
|
|
ast_copy_string(subclass, "Data", slen);
|
|
break;
|
|
case AST_HTML_BEGIN:
|
|
ast_copy_string(subclass, "Begin", slen);
|
|
break;
|
|
case AST_HTML_END:
|
|
ast_copy_string(subclass, "End", slen);
|
|
break;
|
|
case AST_HTML_LDCOMPLETE:
|
|
ast_copy_string(subclass, "Load Complete", slen);
|
|
break;
|
|
case AST_HTML_NOSUPPORT:
|
|
ast_copy_string(subclass, "No Support", slen);
|
|
break;
|
|
case AST_HTML_LINKURL:
|
|
ast_copy_string(subclass, "Link URL", slen);
|
|
if (moreinfo) {
|
|
ast_copy_string(moreinfo, f->data.ptr, mlen);
|
|
}
|
|
break;
|
|
case AST_HTML_UNLINK:
|
|
ast_copy_string(subclass, "Unlink", slen);
|
|
break;
|
|
case AST_HTML_LINKREJECT:
|
|
ast_copy_string(subclass, "Link Reject", slen);
|
|
break;
|
|
default:
|
|
snprintf(subclass, slen, "Unknown HTML frame '%d'\n", f->subclass.integer);
|
|
break;
|
|
}
|
|
break;
|
|
case AST_FRAME_MODEM:
|
|
switch (f->subclass.integer) {
|
|
case AST_MODEM_T38:
|
|
ast_copy_string(subclass, "T.38", slen);
|
|
break;
|
|
case AST_MODEM_V150:
|
|
ast_copy_string(subclass, "V.150", slen);
|
|
break;
|
|
default:
|
|
snprintf(subclass, slen, "Unknown MODEM frame '%d'\n", f->subclass.integer);
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
ast_copy_string(subclass, "Unknown Subclass", slen);
|
|
}
|
|
}
|
|
|
|
void ast_frame_type2str(enum ast_frame_type frame_type, char *ftype, size_t len)
|
|
{
|
|
switch (frame_type) {
|
|
case AST_FRAME_DTMF_BEGIN:
|
|
ast_copy_string(ftype, "DTMF Begin", len);
|
|
break;
|
|
case AST_FRAME_DTMF_END:
|
|
ast_copy_string(ftype, "DTMF End", len);
|
|
break;
|
|
case AST_FRAME_CONTROL:
|
|
ast_copy_string(ftype, "Control", len);
|
|
break;
|
|
case AST_FRAME_NULL:
|
|
ast_copy_string(ftype, "Null Frame", len);
|
|
break;
|
|
case AST_FRAME_IAX:
|
|
/* Should never happen */
|
|
ast_copy_string(ftype, "IAX Specific", len);
|
|
break;
|
|
case AST_FRAME_TEXT:
|
|
ast_copy_string(ftype, "Text", len);
|
|
break;
|
|
case AST_FRAME_IMAGE:
|
|
ast_copy_string(ftype, "Image", len);
|
|
break;
|
|
case AST_FRAME_HTML:
|
|
ast_copy_string(ftype, "HTML", len);
|
|
break;
|
|
case AST_FRAME_MODEM:
|
|
ast_copy_string(ftype, "Modem", len);
|
|
break;
|
|
case AST_FRAME_VOICE:
|
|
ast_copy_string(ftype, "Voice", len);
|
|
break;
|
|
case AST_FRAME_VIDEO:
|
|
ast_copy_string(ftype, "Video", len);
|
|
break;
|
|
default:
|
|
snprintf(ftype, len, "Unknown Frametype '%d'", frame_type);
|
|
}
|
|
}
|
|
|
|
/*! Dump a frame for debugging purposes */
|
|
void ast_frame_dump(const char *name, struct ast_frame *f, char *prefix)
|
|
{
|
|
const char noname[] = "unknown";
|
|
char ftype[40] = "Unknown Frametype";
|
|
char cft[80];
|
|
char subclass[40] = "Unknown Subclass";
|
|
char csub[80];
|
|
char moreinfo[40] = "";
|
|
char cn[60];
|
|
char cp[40];
|
|
char cmn[40];
|
|
|
|
if (!name) {
|
|
name = noname;
|
|
}
|
|
|
|
if (!f) {
|
|
ast_verb(-1, "%s [ %s (NULL) ] [%s]\n",
|
|
term_color(cp, prefix, COLOR_BRMAGENTA, COLOR_BLACK, sizeof(cp)),
|
|
term_color(cft, "HANGUP", COLOR_BRRED, COLOR_BLACK, sizeof(cft)),
|
|
term_color(cn, name, COLOR_YELLOW, COLOR_BLACK, sizeof(cn)));
|
|
return;
|
|
}
|
|
/* XXX We should probably print one each of voice and video when the format changes XXX */
|
|
if (f->frametype == AST_FRAME_VOICE) {
|
|
return;
|
|
}
|
|
if (f->frametype == AST_FRAME_VIDEO) {
|
|
return;
|
|
}
|
|
|
|
ast_frame_type2str(f->frametype, ftype, sizeof(ftype));
|
|
ast_frame_subclass2str(f, subclass, sizeof(subclass), moreinfo, sizeof(moreinfo));
|
|
|
|
if (!ast_strlen_zero(moreinfo))
|
|
ast_verb(-1, "%s [ TYPE: %s (%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_verb(-1, "%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;
|
|
}
|