Cov ntaub ntawv ntawm tsab xov xwm yog muab los ntawm kuv
Tone ntes
Thaum kawg
Nyob rau hauv cov hnub qub, thaum tsis yog txhua tsev neeg muaj TV, thiab ib nrab ntawm lawv tau hloov cov channel siv cov pliers, cov xov xwm zoo siab tau tshwm sim hauv kev tshuaj xyuas ntawm cov xov xwm txawv teb chaws uas ib lub tuam txhab TV tau nruab lawv cov khoom siv nrog wireless chaw taws teeb tswj. Los ntawm cov ntsiab lus nws tau paub tias cov chaw taws teeb tswj ua haujlwm yam tsis muaj roj teeb ua tsaug rau kev siv qhov txawv txav - cov chaw taws teeb tswj yog cov neeg kho tshuab thiab yog ib qho kev sib txuas ntawm cov twj paj nruag - metallophone thiab rab phom. Lub revolver nruas muaj cov hlau thooj voos kheej kheej ntawm qhov ntev sib txawv, thiab thaum tus pin firing ntaus ib qho ntawm lawv, lub tog raj kheej pib nrov ntawm nws tus kheej zaus. Nco ntsoov tias ntawm ultrasound. Cov khoom siv hluav taws xob hauv TV tau hnov ββββcov teeb liab no thiab, tau txiav txim siab nws zaus, ua qhov tsim nyog - hloov cov channel, hloov lub ntim, tua lub TV.
Niaj hnub no peb yuav sim rov tsim kho qhov kev hais kom ua kis las, siv peb txoj kev paub txog kev tshaj tawm streamer.
Txhawm rau simulate lub chaw taws teeb tswj, peb yuav siv cov ntawv nyeem ntawm peb lub suab tshuab hluav taws xob piv txwv. Peb yuav ntxiv rau nws tswj ntawm lub tshuab hluav taws xob zaus los ntawm keystrokes thiab lub receiver nrog lub decoder uas yuav tso tawm tau txais cov lus txib rau lub console. Tom qab kev hloov pauv, lub tshuab hluav taws xob yuav tsum tsim cov suab nrov ntawm 6 zaus, uas peb yuav encode cov lus txib kom nce / txo qhov ntim, hloov cov channel, qhib / tawm TV. Txhawm rau teeb tsa lub ntsuas ntsuas, cov qauv hauv qab no yog siv:
struct _MSToneDetectorDef{
char tone_name[8];
int frequency; /**<Expected frequency of the tone*/
int min_duration; /**<Min duration of the tone in milliseconds */
float min_amplitude; /**<Minimum amplitude of the tone, 1.0 corresponding to the normalized 0dbm level */
};
typedef struct _MSToneDetectorDef MSToneDetectorDef;
Lub tshuab ntes tuaj yeem muab 10 ntawm cov qauv no, yog li ib lub tshuab ntes tuaj yeem teeb tsa kom pom kaum ob lub suab nrov. Tab sis peb yuav siv tsuas yog rau ib lub suab nrov xwb. Txhawm rau hloov chaw mus rau lub ntes, MS_TONE_DETECTOR_ADD_SCAN txoj kev siv.
Txhawm rau kom tus neeg ntes tau ceeb toom rau peb tias lub teeb liab nrog cov khoom siv zaus xav tau tuaj txog ntawm nws cov tswv yim, peb yuav tsum muab nws nrog lub luag haujlwm hu rov qab uas nws yuav tso tawm hauv qhov no. Qhov no yog ua tiav siv lub luag haujlwm ms_filter_set_notify_callback(). Raws li kev sib cav, nws tau txais tus taw tes rau lub lim, tus taw tes rau kev hu xov tooj rov qab, thiab tus taw tes rau cov ntaub ntawv uas peb xav kom dhau mus rau qhov kev hu rov qab (cov ntaub ntawv neeg siv).
Thaum lub tshuab ntes tau tshwm sim, lub luag haujlwm hu rov qab yuav tau txais cov ntaub ntawv tus neeg siv, tus taw tes rau lub ntsuas ntsuas, tus cim xwm txheej, thiab cov qauv piav qhia txog qhov xwm txheej:
/** * Structure carried as argument of the MS_TONE_DETECTOR_EVENT**/
struct _MSToneDetectorEvent{
char tone_name[8]; /* ΠΠΌΡ ΡΠΎΠ½Π° ΠΊΠΎΡΠΎΡΠΎΠ΅ ΠΌΡ Π΅ΠΌΡ Π½Π°Π·Π½Π°ΡΠΈΠ»ΠΈ ΠΏΡΠΈ Π½Π°ΡΡΡΠΎΠΉΠΊΠ΅ Π΄Π΅ΡΠ΅ΠΊΡΠΎΡΠ°. */
uint64_t tone_start_time; /* ΠΡΠ΅ΠΌΡ Π² ΠΌΠΈΠ»Π»ΠΈΡΠ΅ΠΊΡΠ½Π΄Π°Ρ
, ΠΊΠΎΠ³Π΄Π° ΡΠΎΠ½ Π±ΡΠ» ΠΎΠ±Π½Π°ΡΡΠΆΠ΅Π½. */
};
typedef struct _MSToneDetectorEvent MSToneDetectorEvent;
Daim duab thaiv ntawm kev ua cov teeb liab tau pom hauv daim duab npe.
Zoo, tam sim no qhov program code nws tus kheej nrog cov lus pom.
/* Π€Π°ΠΉΠ» mstest4.c ΠΠΌΠΈΡΠ°ΡΠΎΡ ΠΏΡΠ»ΡΡΠ° ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ ΠΈ ΠΏΡΠΈΠ΅ΠΌΠ½ΠΈΠΊΠ°. */
#include <mediastreamer2/msfilter.h>
#include <mediastreamer2/msticker.h>
#include <mediastreamer2/dtmfgen.h>
#include <mediastreamer2/mssndcard.h>
#include <mediastreamer2/msvolume.h>
#include <mediastreamer2/mstonedetector.h>
/* ΠΠΎΠ΄ΠΊΠ»ΡΡΠ°Π΅ΠΌ Π·Π°Π³ΠΎΠ»ΠΎΠ²ΠΎΡΠ½ΡΠΉ ΡΠ°ΠΉΠ» Ρ ΡΡΠ½ΠΊΡΠΈΡΠΌΠΈ ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ ΡΠΎΠ±ΡΡΠΈΡΠΌΠΈ
* ΠΌΠ΅Π΄ΠΈΠ°ΡΡΡΠΈΠΌΠ΅ΡΠ°. */
#include <mediastreamer2/mseventqueue.h>
/* Π€ΡΠ½ΠΊΡΠΈΡ ΠΎΠ±ΡΠ°ΡΠ½ΠΎΠ³ΠΎ Π²ΡΠ·ΠΎΠ²Π°, ΠΎΠ½Π° Π±ΡΠ΄Π΅Ρ Π²ΡΠ·Π²Π°Π½Π° ΡΠΈΠ»ΡΡΡΠΎΠΌ, ΠΊΠ°ΠΊ ΡΠΎΠ»ΡΠΊΠΎ ΠΎΠ½
* ΠΎΠ±Π½Π°ΡΡΠΆΠΈΡ ΡΠΎΠ²ΠΏΠ°Π΄Π΅Π½ΠΈΠ΅ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ Π²Ρ
ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΡΠΈΠ³Π½Π°Π»Π° Ρ Π·Π°Π΄Π°Π½Π½ΡΠΌΠΈ. */
static void tone_detected_cb(void *data, MSFilter *f, unsigned int event_id,
MSToneDetectorEvent *ev)
{
printf(" ΠΡΠΈΠ½ΡΡΠ° ΠΊΠΎΠΌΠ°Π½Π΄Π°: %sn", ev->tone_name);
}
int main()
{
ms_init();
/* Π‘ΠΎΠ·Π΄Π°Π΅ΠΌ ΡΠΊΠ·Π΅ΠΌΠΏΠ»ΡΡΡ ΡΠΈΠ»ΡΡΡΠΎΠ². */
MSFilter *voidsource = ms_filter_new(MS_VOID_SOURCE_ID);
MSFilter *dtmfgen = ms_filter_new(MS_DTMF_GEN_ID);
MSFilter *volume = ms_filter_new(MS_VOLUME_ID);
MSSndCard *card_playback =
ms_snd_card_manager_get_default_card(ms_snd_card_manager_get());
MSFilter *snd_card_write = ms_snd_card_create_writer(card_playback);
MSFilter *detector = ms_filter_new(MS_TONE_DETECTOR_ID);
/* ΠΡΠΈΡΠ°Π΅ΠΌ ΠΌΠ°ΡΡΠΈΠ² Π½Π°Ρ
ΠΎΠ΄ΡΡΠΈΠΉΡΡ Π²Π½ΡΡΡΠΈ Π΄Π΅ΡΠ΅ΠΊΡΠΎΡΠ° ΡΠΎΠ½ΠΎΠ², ΠΎΠ½ ΠΎΠΏΠΈΡΡΠ²Π°Π΅Ρ
* ΠΎΡΠΎΠ±ΡΠ΅ ΠΏΡΠΈΠΌΠ΅ΡΡ ΡΠ°Π·ΡΡΠΊΠΈΠ²Π°Π΅ΠΌΡΡ
ΡΠΈΠ³Π½Π°Π»ΠΎΠ².*/
ms_filter_call_method(detector, MS_TONE_DETECTOR_CLEAR_SCANS, 0);
/* Π‘ΠΎΠ·Π΄Π°Π΅ΠΌ ΠΈΡΡΠΎΡΠ½ΠΈΠΊ ΡΠ°ΠΊΡΠΎΠ² - ΡΠΈΠΊΠ΅Ρ. */
MSTicker *ticker=ms_ticker_new();
/* Π‘ΠΎΠ΅Π΄ΠΈΠ½ΡΠ΅ΠΌ ΡΠΈΠ»ΡΡΡΡ Π² ΡΠ΅ΠΏΠΎΡΠΊΡ. */
ms_filter_link(voidsource, 0, dtmfgen, 0);
ms_filter_link(dtmfgen, 0, volume, 0);
ms_filter_link(volume, 0, detector, 0);
ms_filter_link(detector, 0, snd_card_write, 0);
/* ΠΠΎΠ΄ΠΊΠ»ΡΡΠ°Π΅ΠΌ ΠΊ ΡΠΈΠ»ΡΡΡΡ ΡΡΠ½ΠΊΡΠΈΡ ΠΎΠ±ΡΠ°ΡΠ½ΠΎΠ³ΠΎ Π²ΡΠ·ΠΎΠ²Π°. */
ms_filter_set_notify_callback(detector,
(MSFilterNotifyFunc)tone_detected_cb, NULL);
/* ΠΠΎΠ΄ΠΊΠ»ΡΡΠ°Π΅ΠΌ ΠΈΡΡΠΎΡΠ½ΠΈΠΊ ΡΠ°ΠΊΡΠΎΠ². */
ms_ticker_attach(ticker,voidsource);
/* Π‘ΠΎΠ·Π΄Π°Π΅ΠΌ ΠΌΠ°ΡΡΠΈΠ², ΠΊΠ°ΠΆΠ΄ΡΠΉ ΡΠ»Π΅ΠΌΠ΅Π½Ρ ΠΊΠΎΡΠΎΡΠΎΠ³ΠΎ ΠΎΠΏΠΈΡΡΠ²Π°Π΅Ρ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΡ
* ΠΎΠ΄Π½ΠΎΠ³ΠΎ ΠΈΠ· ΡΠΎΠ½ΠΎΠ², ΠΊΠΎΡΠΎΡΡΠΉ ΡΡΠ΅Π±ΡΠ΅ΡΡΡ ΠΎΠ±Π½Π°ΡΡΠΆΠΈΠ²Π°ΡΡ: Π’Π΅ΠΊΡΡΠΎΠ²ΠΎΠ΅ ΠΈΠΌΡ
* Π΄Π°Π½Π½ΠΎΠ³ΠΎ ΡΠ»Π΅ΠΌΠ΅Π½ΡΠ°, ΡΠ°ΡΡΠΎΡΠ° Π² Π³Π΅ΡΡΠ°Ρ
, Π΄Π»ΠΈΡΠ΅Π»ΡΠ½ΠΎΡΡΡ Π² ΠΌΠΈΠ»Π»ΠΈΡΠ΅ΠΊΡΠ½Π΄Π°Ρ
,
* ΠΌΠΈΠ½ΠΈΠΌΠ°Π»ΡΠ½ΡΠΉ ΡΡΠΎΠ²Π΅Π½Ρ ΠΎΡΠ½ΠΎΡΠΈΡΠ΅Π»ΡΠ½ΠΎ 0,775Π. */
MSToneDetectorDef scan[6]=
{
{"V+", 440, 100, 0.1}, /* ΠΠΎΠΌΠ°Π½Π΄Π° "Π£Π²Π΅Π»ΠΈΡΠΈΡΡ Π³ΡΠΎΠΌΠΊΠΎΡΡΡ". */
{"V-", 540, 100, 0.1}, /* ΠΠΎΠΌΠ°Π½Π΄Π° "Π£ΠΌΠ΅Π½ΡΡΠΈΡΡ Π³ΡΠΎΠΌΠΊΠΎΡΡΡ". */
{"C+", 640, 100, 0.1}, /* ΠΠΎΠΌΠ°Π½Π΄Π° "Π£Π²Π΅Π»ΠΈΡΠΈΡΡ Π½ΠΎΠΌΠ΅Ρ ΠΊΠ°Π½Π°Π»Π°". */
{"C-", 740, 100, 0.1}, /* ΠΠΎΠΌΠ°Π½Π΄Π° "Π£ΠΌΠ΅Π½ΡΡΠΈΡΡ Π½ΠΎΠΌΠ΅Ρ ΠΊΠ°Π½Π°Π»Π°". */
{"ON", 840, 100, 0.1}, /* ΠΠΎΠΌΠ°Π½Π΄Π° "ΠΠΊΠ»ΡΡΠΈΡΡ ΡΠ΅Π»Π΅Π²ΠΈΠ·ΠΎΡ". */
{"OFF", 940, 100, 0.1} /* ΠΠΎΠΌΠ°Π½Π΄Π° "ΠΡΠΊΠ»ΡΡΠΈΡΡ ΡΠ΅Π»Π΅Π²ΠΈΠ·ΠΎΡ". */
};
/* ΠΠ΅ΡΠ΅Π΄Π°Π΅ΠΌ Π² Π΄Π΅ΡΠ΅ΠΊΡΠΎΡ ΡΠΎΠ½ΠΎΠ² ΠΏΡΠΈΠΌΠ΅ΡΡ ΡΠΈΠ³Π½Π°Π»ΠΎΠ². */
int i;
for (i = 0; i < 6; i++)
{
ms_filter_call_method(detector, MS_TONE_DETECTOR_ADD_SCAN,
&scan[i]);
}
/* ΠΠ°ΡΡΡΠ°ΠΈΠ²Π°Π΅ΠΌ ΡΡΡΡΠΊΡΡΡΡ, ΡΠΏΡΠ°Π²Π»ΡΡΡΡΡ Π²ΡΡ
ΠΎΠ΄Π½ΡΠΌ ΡΠΈΠ³Π½Π°Π»ΠΎΠΌ Π³Π΅Π½Π΅ΡΠ°ΡΠΎΡΠ°.*/
MSDtmfGenCustomTone dtmf_cfg;
dtmf_cfg.tone_name[0] = 0;
dtmf_cfg.duration = 1000;
dtmf_cfg.frequencies[0] = 440;
/* ΠΡΠ΄Π΅ΠΌ Π³Π΅Π½Π΅ΡΠΈΡΠΎΠ²Π°ΡΡ ΠΎΠ΄ΠΈΠ½ ΡΠΎΠ½, ΡΠ°ΡΡΠΎΡΡ Π²ΡΠΎΡΠΎΠ³ΠΎ ΡΠΎΠ½Π° ΡΡΡΠ°Π½ΠΎΠ²ΠΈΠΌ Π² 0.*/
dtmf_cfg.frequencies[1] = 0;
dtmf_cfg.amplitude = 1.0;
dtmf_cfg.interval = 0.;
dtmf_cfg.repeat_count = 0.;
/* ΠΡΠ³Π°Π½ΠΈΠ·ΡΠ΅ΠΌ ΡΠΈΠΊΠ» ΡΠΊΠ°Π½ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π½Π°ΠΆΠ°ΡΡΡ
ΠΊΠ»Π°Π²ΠΈΡ. ΠΠ²ΠΎΠ΄ Π½ΡΠ»Ρ Π·Π°Π²Π΅ΡΡΠ°Π΅Ρ
* ΡΠΈΠΊΠ» ΠΈ ΡΠ°Π±ΠΎΡΡ ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΡ. */
char key='9';
printf("ΠΠ°ΠΆΠΌΠΈΡΠ΅ ΠΊΠ»Π°Π²ΠΈΡΡ ΠΊΠΎΠΌΠ°Π½Π΄Ρ, Π·Π°ΡΠ΅ΠΌ Π²Π²ΠΎΠ΄.n"
"ΠΠ»Ρ Π·Π°Π²Π΅ΡΡΠ΅Π½ΠΈΡ ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΡ Π²Π²Π΅Π΄ΠΈΡΠ΅ 0.n");
while(key != '0')
{
key = getchar();
if ((key >= 49) && (key <= 54))
{
printf("ΠΡΠΏΡΠ°Π²Π»Π΅Π½Π° ΠΊΠΎΠΌΠ°Π½Π΄Π°: %cn", key);
/* Π£ΡΡΠ°Π½Π°Π²Π»ΠΈΠ²Π°Π΅ΠΌ ΡΠ°ΡΡΠΎΡΡ Π³Π΅Π½Π΅ΡΠ°ΡΠΎΡΠ° Π² ΡΠΎΠΎΡΠ²Π΅ΡΡΡΠ²ΠΈΠΈ Ρ
* ΠΊΠΎΠ΄ΠΎΠΌ Π½Π°ΠΆΠ°ΡΠΎΠΉ ΠΊΠ»Π°Π²ΠΈΡΠΈ.*/
dtmf_cfg.frequencies[0] = 440 + 100*(key-49);
/* ΠΠΊΠ»ΡΡΠ°Π΅ΠΌ Π·Π²ΡΠΊΠΎΠ²ΠΎΠΉ Π³Π΅Π½Π΅ΡΠ°ΡΠΎΡ c ΠΎΠ±Π½ΠΎΠ²Π»Π΅Π½Π½ΠΎΠΉ ΡΠ°ΡΡΠΎΡΠΎΠΉ. */
ms_filter_call_method(dtmfgen, MS_DTMF_GEN_PLAY_CUSTOM,
(void*)&dtmf_cfg);
}
ms_usleep(20000);
}
}
Peb sau thiab khiav qhov program. Yog tias txhua yam ua haujlwm raug, tom qab tso tawm peb yuav tsum tau txais qee yam zoo li qhov kev coj cwj pwm no:
$ ./mstest4
ALSA lib conf.c:4738:(snd_config_expand) Unknown parameters 0
ALSA lib control.c:954:(snd_ctl_open_noupdate) Invalid CTL default:0
ortp-warning-Could not attach mixer to card: Invalid argument
ALSA lib conf.c:4738:(snd_config_expand) Unknown parameters 0
ALSA lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM default:0
ALSA lib conf.c:4738:(snd_config_expand) Unknown parameters 0
ALSA lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM default:0
ortp-warning-Strange, sound card Intel 82801AA-ICH does not seems to be capable of anything, retrying with plughw...
ΠΠ°ΠΆΠΌΠΈΡΠ΅ ΠΊΠ»Π°Π²ΠΈΡΡ ΠΊΠΎΠΌΠ°Π½Π΄Ρ, Π·Π°ΡΠ΅ΠΌ Π²Π²ΠΎΠ΄.
ΠΠ»Ρ Π·Π°Π²Π΅ΡΡΠ΅Π½ΠΈΡ ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΡ Π²Π²Π΅Π΄ΠΈΡΠ΅ 0.
ortp-warning-alsa_set_params: periodsize:256 Using 256
ortp-warning-alsa_set_params: period:8 Using 8
Nias txhua tus yuam sij los ntawm "1" mus rau "6", pom zoo nrog tus yuam sij "Enter", koj yuav tsum tau txais qee yam zoo li cov npe no:
2
ΠΡΠΏΡΠ°Π²Π»Π΅Π½Π° ΠΊΠΎΠΌΠ°Π½Π΄Π°: 2
ΠΡΠΈΠ½ΡΡΠ° ΠΊΠΎΠΌΠ°Π½Π΄Π°: V-
1
ΠΡΠΏΡΠ°Π²Π»Π΅Π½Π° ΠΊΠΎΠΌΠ°Π½Π΄Π°: 1
ΠΡΠΈΠ½ΡΡΠ° ΠΊΠΎΠΌΠ°Π½Π΄Π°: V+
3
ΠΡΠΏΡΠ°Π²Π»Π΅Π½Π° ΠΊΠΎΠΌΠ°Π½Π΄Π°: 3
ΠΡΠΈΠ½ΡΡΠ° ΠΊΠΎΠΌΠ°Π½Π΄Π°: C+
4
ΠΡΠΏΡΠ°Π²Π»Π΅Π½Π° ΠΊΠΎΠΌΠ°Π½Π΄Π°: 4
ΠΡΠΈΠ½ΡΡΠ° ΠΊΠΎΠΌΠ°Π½Π΄Π°: C-
0
$
Peb pom tias cov suab hais kom ua tiav tau xa mus thiab lub tshuab kuaj pom lawv.
Nyob rau hauv tsab xov xwm tom ntej no peb yuav tig mus xa lub suab teeb liab hla Ethernet network siv RTP raws tu qauv thiab tam sim ntawd siv nws hauv peb cov chaw taws teeb tswj.
Tau qhov twg los: www.hab.com