Indaba ye-athikili ithathwe kweyami
Umtshina wethoni
Ekugcineni
Ezinsukwini zakudala, lapho kungeyona yonke imindeni eyayine-TV, futhi ingxenye yayo yayishintsha iziteshi isebenzisa udlawu, izindaba ezivusa amadlingozi zavela ekubuyekezweni komshini wokunyathelisa wezobuchwepheshe wangaphandle ukuthi omunye umenzi we-TV wahlomisa amadivaysi abo ngesilawuli kude esingenantambo. Kusukela emininingwaneni bekwaziwa ukuthi isilawuli kude sisebenza ngaphandle kwamabhethri ngenxa yokusetshenziswa kwendlela engajwayelekile - isilawulikude sasiwumshini futhi sasiyinhlanganisela yezinsimbi zomculo - i-metallophone nevolovolo. Isigubhu sevolovolo sasiqukethe amasilinda ensimbi anobude obuhlukene, futhi lapho iphinikhodi yokudubula ishaya eyodwa yazo, isilinda saqala ukukhala ngobuningi baso. Ngokujwayelekile ku-ultrasound. I-electronics ku-TV yezwa lesi siginali futhi, ngemva kokunquma ukuvama kwayo, yenza isenzo esifanele - shintsha isiteshi, shintsha ivolumu, ucime i-TV.
Namuhla sizozama ukwakha kabusha lolu hlelo lokudlulisa umyalo, sisebenzisa ulwazi lwethu lomsakazi wemidiya.
Ukuze silingise isilawuli kude, sizosebenzisa umbhalo wesibonelo sethu sokukhiqiza ithoni. Sizokwengeza kukho ukulawula imvamisa yejeneretha kusuka kumakhi kanye nomamukeli onedecoder ezokhipha imiyalo eyamukelwe kukhonsoli. Ngemva koshintsho, ijeneretha kufanele ikhiqize amathoni amafrikhwensi angu-6, esizofaka ngawo imiyalo yokwandisa/ukunciphisa ivolumu, ukushintsha isiteshi, ukuvula/ukuvala i-TV. Ukuze ulungise umtshina, kusetshenziswa isakhiwo esilandelayo:
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;
Umtshina unganikezwa i-10 yalezi zakhiwo, ngakho-ke umtshina owodwa ungamiswa ukuthola amasignali ayishumi amathoni amabili. Kodwa sizosebenzisa amasiginali ayisithupha kuphela ethoni eyodwa. Ukudlulisa izilungiselelo kumtshina, kusetshenziswa indlela ye-MS_TONE_DETECTOR_ADD_SCAN.
Ukuze umtshina usazise ukuthi isignali enezingxenye zefrikhwensi oyifunayo isifikile lapho ifaka khona, kufanele siyinikeze umsebenzi wokuphinda ishayele esizoyiqalisa kulesi simo. Lokhu kwenziwa ngokusebenzisa uhlelo ms_filter_set_notify_callback(). Njengezimpikiswano, ithola i-pointer esihlungini, isikhombi somsebenzi wokuphinda ushaye, kanye nesikhombi sedatha esingathanda ukuyidlulisela kumsebenzi wokuphinda ushayele (idatha yomsebenzisi).
Uma umtshina ucushwa, umsebenzi wokuphinda ushaye ucingo uzothola idatha yomsebenzisi, isikhombi esiya kusihlungi somtshina, isihlonzi somcimbi, kanye nesakhiwo esichaza umcimbi:
/** * 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;
Umdwebo webhulokhi wokucubungula isignali uboniswa esithombeni sesihloko.
Manje, ikhodi yohlelo ngokwayo enamazwana.
/* 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);
}
}
Sihlanganisa futhi siqhube uhlelo. Uma konke kusebenza kahle, ngemuva kokwethulwa kufanele sithole okuthile okufana nalokhu kuziphatha kohlelo:
$ ./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
Cindezela noma yibaphi okhiye ukusuka ku-β1β kuye ku-β6β, uqinisekisa ngokhiye othi βEnterβ, kufanele uthole okuthile okufana nalolu hlu:
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
$
Siyabona ukuthi amathoni omyalo athunyelwa ngempumelelo futhi umtshina uyawathola.
Esihlokweni esilandelayo sizophendukela ekudluliseni isignali yomsindo ngenethiwekhi ye-Ethernet sisebenzisa iphrothokholi ye-RTP futhi siyisebenzise ngokushesha kusilawuli kude sethu.
Source: www.habr.com