diff options
Diffstat (limited to 'main/frame.c')
| -rw-r--r-- | main/frame.c | 1369 |
1 files changed, 1369 insertions, 0 deletions
diff --git a/main/frame.c b/main/frame.c new file mode 100644 index 000000000..0cc44a7eb --- /dev/null +++ b/main/frame.c @@ -0,0 +1,1369 @@ +/* + * Asterisk -- An open source telephony toolkit. + * + * Copyright (C) 1999 - 2005, Digium, Inc. + * + * Mark Spencer <markster@digium.com> + * + * See http://www.asterisk.org for more information about + * the Asterisk project. Please do not directly contact + * any of the maintainers of this project for assistance; + * the project provides a web site, mailing lists and IRC + * channels for your use. + * + * This program is free software, distributed under the terms of + * the GNU General Public License Version 2. See the LICENSE file + * at the top of the source tree. + */ + +/*! \file + * + * \brief Frame and codec manipulation routines + * + * \author Mark Spencer <markster@digium.com> + */ + +#include "asterisk.h" + +ASTERISK_FILE_VERSION(__FILE__, "$Revision$") + +#include <stdlib.h> +#include <unistd.h> +#include <string.h> +#include <errno.h> +#include <stdio.h> + +#include "asterisk/lock.h" +#include "asterisk/frame.h" +#include "asterisk/logger.h" +#include "asterisk/options.h" +#include "asterisk/channel.h" +#include "asterisk/cli.h" +#include "asterisk/term.h" +#include "asterisk/utils.h" + +#ifdef TRACE_FRAMES +static int headers = 0; +static struct ast_frame *headerlist = NULL; +AST_MUTEX_DEFINE_STATIC(framelock); +#endif + +#define SMOOTHER_SIZE 8000 + +enum frame_type { + TYPE_HIGH, /* 0x0 */ + TYPE_LOW, /* 0x1 */ + TYPE_SILENCE, /* 0x2 */ + TYPE_DONTSEND /* 0x3 */ +}; + +#define TYPE_MASK 0x3 + +struct ast_smoother { + int size; + int format; + int readdata; + int optimizablestream; + int flags; + float samplesperbyte; + struct ast_frame f; + struct timeval delivery; + char data[SMOOTHER_SIZE]; + char framedata[SMOOTHER_SIZE + AST_FRIENDLY_OFFSET]; + struct ast_frame *opt; + int len; +}; + +/*! \brief Definition of supported media formats (codecs) */ +static struct ast_format_list { + int visible; /*!< Can we see this entry */ + int bits; /*!< bitmask value */ + char *name; /*!< short name */ + char *desc; /*!< Description */ +} AST_FORMAT_LIST[] = { /*!< Bit number: comment - Bit numbers are hard coded in show_codec() */ + { 1, AST_FORMAT_G723_1 , "g723" , "G.723.1"}, /*!< 1 */ + { 1, AST_FORMAT_GSM, "gsm" , "GSM"}, /*!< 2: codec_gsm.c */ + { 1, AST_FORMAT_ULAW, "ulaw", "G.711 u-law" }, /*!< 3: codec_ulaw.c */ + { 1, AST_FORMAT_ALAW, "alaw", "G.711 A-law" }, /*!< 4: codec_alaw.c */ + { 1, AST_FORMAT_G726, "g726", "G.726 RFC3551" },/*!< 5: codec_g726.c */ + { 1, AST_FORMAT_ADPCM, "adpcm" , "ADPCM"}, /*!< 6: codec_adpcm.c */ + { 1, AST_FORMAT_SLINEAR, "slin", "16 bit Signed Linear PCM"}, /*!< 7 */ + { 1, AST_FORMAT_LPC10, "lpc10", "LPC10" }, /*!< 8: codec_lpc10.c */ + { 1, AST_FORMAT_G729A, "g729", "G.729A" }, /*!< 9: Binary commercial distribution */ + { 1, AST_FORMAT_SPEEX, "speex", "SpeeX" }, /*!< 10: codec_speex.c */ + { 1, AST_FORMAT_ILBC, "ilbc", "iLBC"}, /*!< 11: codec_ilbc.c */ + { 1, AST_FORMAT_G726_AAL2, "g726aal2", "G.726 AAL2" }, /*!< 12: codec_g726.c */ + { 0, 0, "nothing", "undefined" }, + { 0, 0, "nothing", "undefined" }, + { 0, 0, "nothing", "undefined" }, + { 0, 0, "nothing", "undefined" }, + { 0, AST_FORMAT_MAX_AUDIO, "maxaudio", "Maximum audio format" }, + { 1, AST_FORMAT_JPEG, "jpeg", "JPEG image"}, /*!< 17: See format_jpeg.c */ + { 1, AST_FORMAT_PNG, "png", "PNG image"}, /*!< 18: Image format */ + { 1, AST_FORMAT_H261, "h261", "H.261 Video" }, /*!< 19: Video Passthrough */ + { 1, AST_FORMAT_H263, "h263", "H.263 Video" }, /*!< 20: Passthrough support, see format_h263.c */ + { 1, AST_FORMAT_H263_PLUS, "h263p", "H.263+ Video" }, /*!< 21: See format_h263.c */ + { 1, AST_FORMAT_H264, "h264", "H.264 Video" }, /*!< 22: Passthrough support, see format_h263.c */ + { 0, 0, "nothing", "undefined" }, + { 0, 0, "nothing", "undefined" }, + { 0, 0, "nothing", "undefined" }, + { 0, AST_FORMAT_MAX_VIDEO, "maxvideo", "Maximum video format" }, +}; + +struct ast_frame ast_null_frame = { AST_FRAME_NULL, }; + +void ast_smoother_reset(struct ast_smoother *s, int size) +{ + memset(s, 0, sizeof(*s)); + s->size = size; +} + +struct ast_smoother *ast_smoother_new(int size) +{ + struct ast_smoother *s; + if (size < 1) + return NULL; + if ((s = ast_malloc(sizeof(*s)))) + ast_smoother_reset(s, size); + return s; +} + +int ast_smoother_get_flags(struct ast_smoother *s) +{ + return s->flags; +} + +void ast_smoother_set_flags(struct ast_smoother *s, int flags) +{ + s->flags = flags; +} + +int __ast_smoother_feed(struct ast_smoother *s, struct ast_frame *f, int swap) +{ + if (f->frametype != AST_FRAME_VOICE) { + ast_log(LOG_WARNING, "Huh? Can't smooth a non-voice frame!\n"); + return -1; + } + if (!s->format) { + s->format = f->subclass; + s->samplesperbyte = (float)f->samples / (float)f->datalen; + } else if (s->format != f->subclass) { + ast_log(LOG_WARNING, "Smoother was working on %d format frames, now trying to feed %d?\n", s->format, f->subclass); + return -1; + } + if (s->len + f->datalen > SMOOTHER_SIZE) { + ast_log(LOG_WARNING, "Out of smoother space\n"); + return -1; + } + if (((f->datalen == s->size) || ((f->datalen < 10) && (s->flags & AST_SMOOTHER_FLAG_G729))) + && !s->opt && (f->offset >= AST_MIN_OFFSET)) { + if (!s->len) { + /* Optimize by sending the frame we just got + on the next read, thus eliminating the douple + copy */ + s->opt = f; + return 0; + } else { + s->optimizablestream++; + if (s->optimizablestream > 10) { + /* For the past 10 rounds, we have input and output + frames of the correct size for this smoother, yet + we were unable to optimize because there was still + some cruft left over. Lets just drop the cruft so + we can move to a fully optimized path */ + s->len = 0; + s->opt = f; + return 0; + } + } + } else + s->optimizablestream = 0; + if (s->flags & AST_SMOOTHER_FLAG_G729) { + if (s->len % 10) { + ast_log(LOG_NOTICE, "Dropping extra frame of G.729 since we already have a VAD frame at the end\n"); + return 0; + } + } + if (swap) + ast_swapcopy_samples(s->data+s->len, f->data, f->samples); + else + memcpy(s->data + s->len, f->data, f->datalen); + /* If either side is empty, reset the delivery time */ + if (!s->len || ast_tvzero(f->delivery) || ast_tvzero(s->delivery)) /* XXX really ? */ + s->delivery = f->delivery; + s->len += f->datalen; + return 0; +} + +struct ast_frame *ast_smoother_read(struct ast_smoother *s) +{ + struct ast_frame *opt; + int len; + + /* IF we have an optimization frame, send it */ + if (s->opt) { + if (s->opt->offset < AST_FRIENDLY_OFFSET) + ast_log(LOG_WARNING, "Returning a frame of inappropriate offset (%d).", + s->opt->offset); + opt = s->opt; + s->opt = NULL; + return opt; + } + + /* Make sure we have enough data */ + if (s->len < s->size) { + /* Or, if this is a G.729 frame with VAD on it, send it immediately anyway */ + if (!((s->flags & AST_SMOOTHER_FLAG_G729) && (s->size % 10))) + return NULL; + } + len = s->size; + if (len > s->len) + len = s->len; + /* Make frame */ + s->f.frametype = AST_FRAME_VOICE; + s->f.subclass = s->format; + s->f.data = s->framedata + AST_FRIENDLY_OFFSET; + s->f.offset = AST_FRIENDLY_OFFSET; + s->f.datalen = len; + /* Samples will be improper given VAD, but with VAD the concept really doesn't even exist */ + s->f.samples = len * s->samplesperbyte; /* XXX rounding */ + s->f.delivery = s->delivery; + /* Fill Data */ + memcpy(s->f.data, s->data, len); + s->len -= len; + /* Move remaining data to the front if applicable */ + if (s->len) { + /* In principle this should all be fine because if we are sending + G.729 VAD, the next timestamp will take over anyawy */ + memmove(s->data, s->data + len, s->len); + if (!ast_tvzero(s->delivery)) { + /* If we have delivery time, increment it, otherwise, leave it at 0 */ + s->delivery = ast_tvadd(s->delivery, ast_samp2tv(s->f.samples, 8000)); + } + } + /* Return frame */ + return &s->f; +} + +void ast_smoother_free(struct ast_smoother *s) +{ + free(s); +} + +static struct ast_frame *ast_frame_header_new(void) +{ + struct ast_frame *f = ast_calloc(1, sizeof(*f)); +#ifdef TRACE_FRAMES + if (f) { + f->prev = NULL; + ast_mutex_lock(&framelock); + headers++; + f->next = headerlist; + if (headerlist) + headerlist->prev = f; + headerlist = f; + ast_mutex_unlock(&framelock); + } +#endif + return f; +} + +/*! + * \todo Important: I should be made more efficient. Frame headers should + * most definitely be cached + */ +void ast_frfree(struct ast_frame *fr) +{ + if (fr->mallocd & AST_MALLOCD_DATA) { + if (fr->data) + free(fr->data - fr->offset); + } + if (fr->mallocd & AST_MALLOCD_SRC) { + if (fr->src) + free((char *)fr->src); + } + if (fr->mallocd & AST_MALLOCD_HDR) { +#ifdef TRACE_FRAMES + ast_mutex_lock(&framelock); + headers--; + if (fr->next) + fr->next->prev = fr->prev; + if (fr->prev) + fr->prev->next = fr->next; + else + headerlist = fr->next; + ast_mutex_unlock(&framelock); +#endif + free(fr); + } +} + +/*! + * \brief 'isolates' a frame by duplicating non-malloc'ed components + * (header, src, data). + * On return all components are malloc'ed + */ +struct ast_frame *ast_frisolate(struct ast_frame *fr) +{ + struct ast_frame *out; + void *newdata; + + if (!(fr->mallocd & AST_MALLOCD_HDR)) { + /* Allocate a new header if needed */ + if (!(out = ast_frame_header_new())) + return NULL; + out->frametype = fr->frametype; + out->subclass = fr->subclass; + out->datalen = fr->datalen; + out->samples = fr->samples; + out->offset = fr->offset; + out->data = fr->data; + /* Copy the timing data */ + out->has_timing_info = fr->has_timing_info; + if (fr->has_timing_info) { + out->ts = fr->ts; + out->len = fr->len; + out->seqno = fr->seqno; + } + } else + out = fr; + + if (!(fr->mallocd & AST_MALLOCD_SRC)) { + if (fr->src) { + if (!(out->src = ast_strdup(fr->src))) { + if (out != fr) + free(out); + return NULL; + } + } + } else + out->src = fr->src; + + if (!(fr->mallocd & AST_MALLOCD_DATA)) { + if (!(newdata = ast_malloc(fr->datalen + AST_FRIENDLY_OFFSET))) { + if (out->src != fr->src) + free((void *) out->src); + if (out != fr) + free(out); + return NULL; + } + newdata += AST_FRIENDLY_OFFSET; + out->offset = AST_FRIENDLY_OFFSET; + out->datalen = fr->datalen; + memcpy(newdata, fr->data, fr->datalen); + out->data = newdata; + } + + out->mallocd = AST_MALLOCD_HDR | AST_MALLOCD_SRC | AST_MALLOCD_DATA; + + return out; +} + +struct ast_frame *ast_frdup(const struct ast_frame *f) +{ + struct ast_frame *out; + int len, srclen = 0; + void *buf; + /* Start with standard stuff */ + 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) + srclen = strlen(f->src); + if (srclen > 0) + len += srclen + 1; + if (!(buf = ast_calloc(1, len))) + return NULL; + out = buf; + /* Set us as having malloc'd header only, so it will eventually + get freed. */ + out->frametype = f->frametype; + out->subclass = f->subclass; + out->datalen = f->datalen; + out->samples = f->samples; + out->delivery = f->delivery; + out->mallocd = AST_MALLOCD_HDR; + out->offset = AST_FRIENDLY_OFFSET; + if (out->datalen) { + out->data = buf + sizeof(*out) + AST_FRIENDLY_OFFSET; + memcpy(out->data, f->data, out->datalen); + } + if (srclen > 0) { + out->src = buf + sizeof(*out) + AST_FRIENDLY_OFFSET + f->datalen; + /* Must have space since we allocated for it */ + strcpy((char *)out->src, f->src); + } + out->has_timing_info = f->has_timing_info; + if (f->has_timing_info) { + out->ts = f->ts; + out->len = f->len; + out->seqno = f->seqno; + } + return out; +} + +#if 0 +/* + * XXX + * This function is badly broken - it does not handle correctly + * partial reads on either header or body. + * However is it never used anywhere so we leave it commented out + */ +struct ast_frame *ast_fr_fdread(int fd) +{ + char buf[65536]; + int res; + struct ast_frame *f = (struct ast_frame *)buf; + int ttl = sizeof(*f); + /* Read a frame directly from there. They're always in the + right format. */ + + while(ttl) { + res = read(fd, buf, ttl); + if (res < 0) { + ast_log(LOG_WARNING, "Bad read on %d: %s\n", fd, strerror(errno)); + return NULL; + } + ttl -= res; + } + + /* read the frame header */ + + /* Re-write data position */ + f->data = buf + sizeof(*f); + f->offset = 0; + /* Forget about being mallocd */ + f->mallocd = 0; + /* Re-write the source */ + f->src = (char *)__FUNCTION__; + if (f->datalen > sizeof(buf) - sizeof(*f)) { + /* Really bad read */ + ast_log(LOG_WARNING, "Strange read (%d bytes)\n", f->datalen); + return NULL; + } + if (f->datalen) { + if ((res = read(fd, f->data, f->datalen)) != f->datalen) { + /* Bad read */ + ast_log(LOG_WARNING, "How very strange, expected %d, got %d\n", f->datalen, res); + return NULL; + } + } + if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_HANGUP)) { + return NULL; + } + return ast_frisolate(f); +} + +/* Some convenient routines for sending frames to/from stream or datagram + sockets, pipes, etc (maybe even files) */ + +/* + * XXX this function is also partly broken because it does not handle + * partial writes. We comment it out too, and also the unique + * client it has, ast_fr_fdhangup() + */ +int ast_fr_fdwrite(int fd, struct ast_frame *frame) +{ + /* Write the frame exactly */ + if (write(fd, frame, sizeof(*frame)) != sizeof(*frame)) { + ast_log(LOG_WARNING, "Write error: %s\n", strerror(errno)); + return -1; + } + if (write(fd, frame->data, frame->datalen) != frame->datalen) { + ast_log(LOG_WARNING, "Write error: %s\n", strerror(errno)); + return -1; + } + return 0; +} + +int ast_fr_fdhangup(int fd) +{ + struct ast_frame hangup = { + AST_FRAME_CONTROL, + AST_CONTROL_HANGUP + }; + return ast_fr_fdwrite(fd, &hangup); +} + +#endif /* unused functions */ + +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); +} + + +struct ast_format_list *ast_get_format_list_index(int index) +{ + return &AST_FORMAT_LIST[index]; +} + +struct ast_format_list *ast_get_format_list(size_t *size) +{ + *size = (sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0])); + return AST_FORMAT_LIST; +} + +char* ast_getformatname(int format) +{ + int x; + char *ret = "unknown"; + for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) { + if(AST_FORMAT_LIST[x].visible && AST_FORMAT_LIST[x].bits == format) { + ret = AST_FORMAT_LIST[x].name; + break; + } + } + return ret; +} + +char *ast_getformatname_multiple(char *buf, size_t size, int format) +{ + int x; + unsigned len; + char *start, *end = buf; + + if (!size) + return buf; + snprintf(end, size, "0x%x (", format); + len = strlen(end); + end += len; + size -= len; + start = end; + for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) { + if (AST_FORMAT_LIST[x].visible && (AST_FORMAT_LIST[x].bits & format)) { + snprintf(end, size,"%s|",AST_FORMAT_LIST[x].name); + len = strlen(end); + end += len; + size -= len; + } + } + if (start == end) + snprintf(start, size, "nothing)"); + else if (size > 1) + *(end -1) = ')'; + return buf; +} + +static struct ast_codec_alias_table { + char *alias; + char *realname; +} ast_codec_alias_table[] = { + { "slinear", "slin"}, + { "g723.1", "g723"}, +}; + +static const char *ast_expand_codec_alias(const char *in) +{ + int x; + + for (x = 0; x < sizeof(ast_codec_alias_table) / sizeof(ast_codec_alias_table[0]); x++) { + if(!strcmp(in,ast_codec_alias_table[x].alias)) + return ast_codec_alias_table[x].realname; + } + return in; +} + +int ast_getformatbyname(const char *name) +{ + int x, all, format = 0; + + all = strcasecmp(name, "all") ? 0 : 1; + for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) { + if(AST_FORMAT_LIST[x].visible && (all || + !strcasecmp(AST_FORMAT_LIST[x].name,name) || + !strcasecmp(AST_FORMAT_LIST[x].name,ast_expand_codec_alias(name)))) { + format |= AST_FORMAT_LIST[x].bits; + if(!all) + break; + } + } + + return format; +} + +char *ast_codec2str(int codec) +{ + int x; + char *ret = "unknown"; + for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) { + if(AST_FORMAT_LIST[x].visible && AST_FORMAT_LIST[x].bits == codec) { + ret = AST_FORMAT_LIST[x].desc; + break; + } + } + return ret; +} + +static int show_codecs(int fd, int argc, char *argv[]) +{ + int i, found=0; + char hex[25]; + + if ((argc < 2) || (argc > 3)) + return RESULT_SHOWUSAGE; + + if (!ast_opt_dont_warn) + ast_cli(fd, "Disclaimer: this command is for informational purposes only.\n" + "\tIt does not indicate anything about your configuration.\n"); + + ast_cli(fd, "%11s %9s %10s TYPE %8s %s\n","INT","BINARY","HEX","NAME","DESC"); + ast_cli(fd, "--------------------------------------------------------------------------------\n"); + if ((argc == 2) || (!strcasecmp(argv[1],"audio"))) { + found = 1; + for (i=0;i<12;i++) { + snprintf(hex,25,"(0x%x)",1<<i); + ast_cli(fd, "%11u (1 << %2d) %10s audio %8s (%s)\n",1 << i,i,hex,ast_getformatname(1<<i),ast_codec2str(1<<i)); + } + } + + if ((argc == 2) || (!strcasecmp(argv[1],"image"))) { + found = 1; + for (i=16;i<18;i++) { + snprintf(hex,25,"(0x%x)",1<<i); + ast_cli(fd, "%11u (1 << %2d) %10s image %8s (%s)\n",1 << i,i,hex,ast_getformatname(1<<i),ast_codec2str(1<<i)); + } + } + + if ((argc == 2) || (!strcasecmp(argv[1],"video"))) { + found = 1; + for (i=18;i<22;i++) { + snprintf(hex,25,"(0x%x)",1<<i); + ast_cli(fd, "%11u (1 << %2d) %10s video %8s (%s)\n",1 << i,i,hex,ast_getformatname(1<<i),ast_codec2str(1<<i)); + } + } + + if (! found) + return RESULT_SHOWUSAGE; + else + return RESULT_SUCCESS; +} + +static char frame_show_codecs_usage[] = +"Usage: show [audio|video|image] codecs\n" +" Displays codec mapping\n"; + +static int show_codec_n(int fd, int argc, char *argv[]) +{ + int codec, i, found=0; + + if (argc != 3) + return RESULT_SHOWUSAGE; + + if (sscanf(argv[2],"%d",&codec) != 1) + return RESULT_SHOWUSAGE; + + for (i = 0; i < 32; i++) + if (codec & (1 << i)) { + found = 1; + ast_cli(fd, "%11u (1 << %2d) %s\n",1 << i,i,ast_codec2str(1<<i)); + } + + if (!found) + ast_cli(fd, "Codec %d not found\n", codec); + + return RESULT_SUCCESS; +} + +static char frame_show_codec_n_usage[] = +"Usage: show codec <number>\n" +" Displays codec mapping\n"; + +/*! 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_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: + strcpy(ftype, "DTMF"); + subclass[0] = f->subclass; + subclass[1] = '\0'; + break; + case AST_FRAME_CONTROL: + strcpy(ftype, "Control"); + switch(f->subclass) { + 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 -1: + strcpy(subclass, "Stop generators"); + break; + default: + snprintf(subclass, sizeof(subclass), "Unknown control '%d'", f->subclass); + } + 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); + break; + case AST_FRAME_TEXT: + strcpy(ftype, "Text"); + strcpy(subclass, "N/A"); + ast_copy_string(moreinfo, f->data, sizeof(moreinfo)); + break; + case AST_FRAME_IMAGE: + strcpy(ftype, "Image"); + snprintf(subclass, sizeof(subclass), "Image format %s\n", ast_getformatname(f->subclass)); + break; + case AST_FRAME_HTML: + strcpy(ftype, "HTML"); + switch(f->subclass) { + case AST_HTML_URL: + strcpy(subclass, "URL"); + ast_copy_string(moreinfo, f->data, 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, 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); + break; + } + break; + case AST_FRAME_MODEM: + strcpy(ftype, "Modem"); + switch (f->subclass) { + 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); + 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, + 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, + term_color(cn, name, COLOR_YELLOW, COLOR_BLACK, sizeof(cn))); +} + + +#ifdef TRACE_FRAMES +static int show_frame_stats(int fd, int argc, char *argv[]) +{ + struct ast_frame *f; + int x=1; + if (argc != 3) + return RESULT_SHOWUSAGE; + ast_mutex_lock(&framelock); + ast_cli(fd, " Framer Statistics \n"); + ast_cli(fd, "---------------------------\n"); + ast_cli(fd, "Total allocated headers: %d\n", headers); + ast_cli(fd, "Queue Dump:\n"); + for (f=headerlist; f; f = f->next) { + ast_cli(fd, "%d. Type %d, subclass %d from %s\n", x++, f->frametype, f->subclass, f->src ? f->src : "<Unknown>"); + } + ast_mutex_unlock(&framelock); + return RESULT_SUCCESS; +} + +static char frame_stats_usage[] = +"Usage: show frame stats\n" +" Displays debugging statistics from framer\n"; +#endif + +/* Builtin Asterisk CLI-commands for debugging */ +static struct ast_cli_entry my_clis[] = { +{ { "show", "codecs", NULL }, show_codecs, "Shows codecs", frame_show_codecs_usage }, +{ { "show", "audio", "codecs", NULL }, show_codecs, "Shows audio codecs", frame_show_codecs_usage }, +{ { "show", "video", "codecs", NULL }, show_codecs, "Shows video codecs", frame_show_codecs_usage }, +{ { "show", "image", "codecs", NULL }, show_codecs, "Shows image codecs", frame_show_codecs_usage }, +{ { "show", "codec", NULL }, show_codec_n, "Shows a specific codec", frame_show_codec_n_usage }, +#ifdef TRACE_FRAMES +{ { "show", "frame", "stats", NULL }, show_frame_stats, "Shows frame statistics", frame_stats_usage }, +#endif +}; + +int init_framer(void) +{ + ast_cli_register_multiple(my_clis, sizeof(my_clis)/sizeof(my_clis[0]) ); + return 0; +} + +void ast_codec_pref_convert(struct ast_codec_pref *pref, char *buf, size_t size, int right) +{ + int x, differential = (int) 'A', mem; + char *from, *to; + + if(right) { + from = pref->order; + to = buf; + mem = size; + } else { + to = pref->order; + from = buf; + mem = 32; + } + + memset(to, 0, mem); + for (x = 0; x < 32 ; x++) { + if(!from[x]) + break; + to[x] = right ? (from[x] + differential) : (from[x] - differential); + } +} + +int ast_codec_pref_string(struct ast_codec_pref *pref, char *buf, size_t size) +{ + int x, codec; + size_t total_len, slen; + char *formatname; + + memset(buf,0,size); + total_len = size; + buf[0] = '('; + total_len--; + for(x = 0; x < 32 ; x++) { + if(total_len <= 0) + break; + if(!(codec = ast_codec_pref_index(pref,x))) + break; + if((formatname = ast_getformatname(codec))) { + slen = strlen(formatname); + if(slen > total_len) + break; + strncat(buf,formatname,total_len); + total_len -= slen; + } + if(total_len && x < 31 && ast_codec_pref_index(pref , x + 1)) { + strncat(buf,"|",total_len); + total_len--; + } + } + if(total_len) { + strncat(buf,")",total_len); + total_len--; + } + + return size - total_len; +} + +int ast_codec_pref_index(struct ast_codec_pref *pref, int index) +{ + int slot = 0; + + + if((index >= 0) && (index < sizeof(pref->order))) { + slot = pref->order[index]; + } + + return slot ? AST_FORMAT_LIST[slot-1].bits : 0; +} + +/*! \brief Remove codec from pref list */ +void ast_codec_pref_remove(struct ast_codec_pref *pref, int format) +{ + struct ast_codec_pref oldorder; + int x, y = 0; + int slot; + + if(!pref->order[0]) + return; + + memcpy(&oldorder, pref, sizeof(oldorder)); + memset(pref, 0, sizeof(*pref)); + + for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) { + slot = oldorder.order[x]; + if(! slot) + break; + if(AST_FORMAT_LIST[slot-1].bits != format) + pref->order[y++] = slot; + } + +} + +/*! \brief Append codec to list */ +int ast_codec_pref_append(struct ast_codec_pref *pref, int format) +{ + int x, newindex = -1; + + ast_codec_pref_remove(pref, format); + + for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) { + if(AST_FORMAT_LIST[x].bits == format) { + newindex = x + 1; + break; + } + } + + if(newindex) { + for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) { + if(!pref->order[x]) { + pref->order[x] = newindex; + break; + } + } + } + + return x; +} + + +/*! \brief Pick a codec */ +int ast_codec_choose(struct ast_codec_pref *pref, int formats, int find_best) +{ + int x, ret = 0, slot; + + for (x = 0; x < sizeof(AST_FORMAT_LIST) / sizeof(AST_FORMAT_LIST[0]); x++) { + slot = pref->order[x]; + + if (!slot) + break; + if (formats & AST_FORMAT_LIST[slot-1].bits) { + ret = AST_FORMAT_LIST[slot-1].bits; + break; + } + } + if(ret & AST_FORMAT_AUDIO_MASK) + return ret; + + if (option_debug > 3) + ast_log(LOG_DEBUG, "Could not find preferred codec - %s\n", find_best ? "Going for the best codec" : "Returning zero codec"); + + return find_best ? ast_best_codec(formats) : 0; +} + +void ast_parse_allow_disallow(struct ast_codec_pref *pref, int *mask, const char *list, int allowing) +{ + char *parse; + char *this; + int format; + + parse = ast_strdupa(list); + while ((this = strsep(&parse, ","))) { + if (!(format = ast_getformatbyname(this))) { + ast_log(LOG_WARNING, "Cannot %s unknown format '%s'\n", allowing ? "allow" : "disallow", this); + continue; + } + + if (mask) { + if (allowing) + *mask |= format; + else + *mask &= ~format; + } + + /* Set up a preference list for audio. Do not include video in preferences + since we can not transcode video and have to use whatever is offered + */ + if (pref && (format & AST_FORMAT_AUDIO_MASK)) { + if (strcasecmp(this, "all")) { + if (allowing) + ast_codec_pref_append(pref, format); + else + ast_codec_pref_remove(pref, format); + } else if (!allowing) { + memset(pref, 0, sizeof(*pref)); + } + } + } +} + +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 int SpeexWBSubModeSz[] = { + 0, 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 int SpeexSubModeSz[] = { + 5, 43, 119, 160, + 220, 300, 364, 492, + 79, 0, 0, 0, + 0, 0, 0, 0 }; + static 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) { + ast_log(LOG_WARNING, "Not enough bits remaining after wide band for speex samples.\n"); + 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 5 bits contain msg len */ + c = get_n_bits_at(data, 5, bit); + bit += 5; + bit += c * 8; + } else if (c > 8) { + /* unknown */ + 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) { + case AST_FORMAT_SPEEX: + samples = speex_samples(f->data, f->datalen); + break; + case AST_FORMAT_G723_1: + samples = g723_samples(f->data, 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: + 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))[7] & 0x1) * 8; + break; + case AST_FORMAT_ULAW: + case AST_FORMAT_ALAW: + samples = f->datalen; + break; + case AST_FORMAT_ADPCM: + case AST_FORMAT_G726: + case AST_FORMAT_G726_AAL2: + samples = f->datalen * 2; + break; + default: + ast_log(LOG_WARNING, "Unable to calculate samples for format %s\n", ast_getformatname(f->subclass)); + } + return samples; +} + +int ast_codec_get_len(int format, int samples) +{ + int len = 0; + + /* XXX Still need speex, g723, and lpc10 XXX */ + switch(format) { + 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: + len = samples * 2; + break; + case AST_FORMAT_ULAW: + case AST_FORMAT_ALAW: + len = samples; + break; + case AST_FORMAT_ADPCM: + case AST_FORMAT_G726: + case AST_FORMAT_G726_AAL2: + len = samples / 2; + 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; + short adjust_value = abs(adjustment); + + if ((f->frametype != AST_FRAME_VOICE) || (f->subclass != AST_FORMAT_SLINEAR)) + 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 != AST_FORMAT_SLINEAR)) + return -1; + + if ((f2->frametype != AST_FRAME_VOICE) || (f2->subclass != AST_FORMAT_SLINEAR)) + return -1; + + if (f1->samples != f2->samples) + return -1; + + for (count = 0, data1 = f1->data, data2 = f2->data; + count < f1->samples; + count++, data1++, data2++) + ast_slinear_saturated_add(data1, data2); + + return 0; +} + +struct ast_frame *ast_frame_enqueue(struct ast_frame *head, struct ast_frame *f, int maxlen, int dupe) +{ + struct ast_frame *cur, *oldhead; + int len=0; + if (f && dupe) + f = ast_frdup(f); + if (!f) + return head; + + f->next = NULL; + if (!head) + return f; + cur = head; + while(cur->next) { + cur = cur->next; + len++; + if (len >= maxlen) { + oldhead = head; + head = head->next; + ast_frfree(oldhead); + } + } + return head; +} |