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Autres articles (63)
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Diogene : création de masques spécifiques de formulaires d’édition de contenus
26 octobre 2010, parDiogene est un des plugins ? SPIP activé par défaut (extension) lors de l’initialisation de MediaSPIP.
A quoi sert ce plugin
Création de masques de formulaires
Le plugin Diogène permet de créer des masques de formulaires spécifiques par secteur sur les trois objets spécifiques SPIP que sont : les articles ; les rubriques ; les sites
Il permet ainsi de définir en fonction d’un secteur particulier, un masque de formulaire par objet, ajoutant ou enlevant ainsi des champs afin de rendre le formulaire (...) -
MediaSPIP version 0.1 Beta
16 avril 2011, parMediaSPIP 0.1 beta est la première version de MediaSPIP décrétée comme "utilisable".
Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
Pour avoir une installation fonctionnelle, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...) -
Utilisation et configuration du script
19 janvier 2011, parInformations spécifiques à la distribution Debian
Si vous utilisez cette distribution, vous devrez activer les dépôts "debian-multimedia" comme expliqué ici :
Depuis la version 0.3.1 du script, le dépôt peut être automatiquement activé à la suite d’une question.
Récupération du script
Le script d’installation peut être récupéré de deux manières différentes.
Via svn en utilisant la commande pour récupérer le code source à jour :
svn co (...)
Sur d’autres sites (3568)
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swscale/aarch64 : add hscale specializations
26 mai 2022, par Swinney, Jonathanswscale/aarch64 : add hscale specializations
This patch adds code to support specializations of the hscale function
and adds a specialization for filterSize == 4.ff_hscale8to15_4_neon is a complete rewrite. Since the main bottleneck
here is loading the data from src, this data is loaded a whole block
ahead and stored back to the stack to be loaded again with ld4. This
arranges the data for most efficient use of the vector instructions and
removes the need for completion adds at the end. The number of
iterations of the C per iteration of the assembly is increased from 4 to
8, but because of the prefetching, there must be a special section
without prefetching when dstW < 16.This improves speed on Graviton 2 (Neoverse N1) dramatically in the case
where previously fs=8 would have been required.before : hscale_8_to_15__fs_8_dstW_512_neon : 1962.8
after : hscale_8_to_15__fs_4_dstW_512_neon : 1220.9Signed-off-by : Jonathan Swinney <jswinney@amazon.com>
Signed-off-by : Martin Storsjö <martin@martin.st> -
Getting and decoding video by RTP H264
29 novembre 2023, par AlekseiKraevParsing RTP H264.
WINAPI C. A queue from C++ has been applied, I repent.


RTP is generated using FFMPEG with the following command :
ffmpeg.exe -f gdigrab -framerate 25 -i desktop -s 853x480 -b:v 120000 -c:v libx264 -f rtp rtp ://127.0.0.1:8080


Parsing the incoming RTP/h264 stream and converting it to an RGB matrix.


video_H264_decode.h


#pragma once
#ifndef _VIDEO_H264_DECODE_SEND_H // Блокируем повторное включение этого модуля
#define _VIDEO_H264_DECODE_SEND_H
//******************************************************************************
// Section include
//******************************************************************************
#include "main.h"
#include 
//******************************************************************************
// Constants
//******************************************************************************

//******************************************************************************
// Type
//******************************************************************************
typedef struct {
 unsigned char* data;
 int size;
}RTPData_DType;

typedef struct 
{
 union
 {
 struct
 {
 char V:2; //Версия
 char P:1; //заполнение
 char X:1; //расширение
 char CC:4; //количество CSRC

 char M:1; //маркер (флаг последнего пакета AU),
 char PT:7; //полезная нагрузка (тип данных носителя полезной нагрузки RTP, H264 = 96)

 short sequence_number; //Порядковый номер: порядковый номер пакета RTP, увеличенный на 1.
 int time_stamp; //временная метка выборки медиа. 
 int SSRC; //Пакет данных имеет одинаковое происхождение.
 };
 unsigned char data[12];
 };
}RTPHeader_DType;
//******************************************************************************
// Global var
//******************************************************************************

//******************************************************************************
// Local function prototype
//******************************************************************************
UCHAR rtp_H264_recive_init(void);
UCHAR RTPStop(void);
//******************************************************************************
// Macros
//******************************************************************************
#define BYTE2_SWAP(X) ((((short)(X) & 0xff00) >> 8) |(((short)(X) & 0x00ff) << 8))
#endif
//******************************************************************************
// ENF OF FILE
//******************************************************************************


video_H264_decode.c


//******************************************************************************
//include
//******************************************************************************
#include "main.h"
/*#include "video_H264_decode.h"
#include 
#include 
#include <chrono>
#include 

#pragma comment(lib, "ws2_32.lib")
#include */
#include <iostream>
#include <queue>

extern "C" {
#include "libavformat/avformat.h"
#include "libavfilter/avfilter.h"
#include "libavdevice/avdevice.h"
#include "libswscale/swscale.h"
#include "libswresample/swresample.h"
#include "libpostproc/postprocess.h"
#include "libavcodec/avcodec.h"
}

#pragma comment(lib,"avcodec.lib")
#pragma comment(lib,"avdevice.lib")
#pragma comment(lib,"avfilter.lib")
#pragma comment(lib,"avformat.lib")
#pragma comment(lib,"avutil.lib")
#pragma comment(lib,"postproc.lib")
#pragma comment(lib,"swresample.lib")
#pragma comment(lib,"swscale.lib")

#pragma warning(disable: 4996)
//******************************************************************************
// Section for determining the variables used in the module
//******************************************************************************
//------------------------------------------------------------------------------
// Global
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
// Local
//------------------------------------------------------------------------------
const int inteval = 0x01000000;
BOOL FlagRTPActive = TRUE;

HANDLE hMutexRTPRecive;
HANDLE hSemaphoreRTP;
HANDLE hTreadRTPRecive;
HANDLE hTreadRTPDecode;


SOCKET RTPSocket; //socket UDP RTP
RTPData_DType packet;
RTPData_DType FU_buffer = { 0 };

std::queue q;
std::set<int> seq;

AVFormatContext* pAVFormatContext;
AVCodecContext* pAVCodecContext;
const AVCodec* pAVCodec;
AVFrame* pAVFrame;
AVFrame* AVFrameRGG;
SwsContext* pSwsContext;
AVPacket *pAVPacket;
AVCodecParserContext* pAVCodecParserContext;

UINT port;
//******************************************************************************
// Section of prototypes of local functions
//******************************************************************************
DWORD WINAPI rtp_H264_recive_Procedure(CONST LPVOID lpParam);
DWORD WINAPI rtp_decode_Procedure(CONST LPVOID lpParam);
char RTPSocketInit(void);
void RTPPacketParser(void);
char RTPSocketRecive(void);
void Decode_NaluToAVFrameRGG();
//******************************************************************************
// Section of the description of functions
//******************************************************************************
UCHAR rtp_H264_recive_init(void)
{
 hSemaphoreRTP = CreateSemaphore(
 NULL, // default security attributes
 0, // initial count
 1, // maximum count
 NULL); // unnamed semaphore

 hMutexRTPRecive = CreateMutex(
 NULL, // default security attributes
 FALSE, // initially not owned
 NULL); // unnamed mutex

 hTreadRTPRecive = CreateThread(NULL, NULL, rtp_H264_recive_Procedure, NULL, NULL, NULL);
 hTreadRTPDecode = CreateThread(NULL, NULL, rtp_decode_Procedure, NULL, NULL, NULL);

 return 0;
}
//------------------------------------------------------------------------------
UCHAR RTPStop(void)
{
 FlagRTPActive = FALSE;

 if (hSemaphoreRTP) CloseHandle(hSemaphoreRTP);
 if (hMutexRTPRecive) CloseHandle(hMutexRTPRecive);
 if (hTreadRTPRecive) CloseHandle(hTreadRTPRecive);

 closesocket(RTPSocket); 

 return 0;
}
//------------------------------------------------------------------------------
DWORD WINAPI rtp_H264_recive_Procedure(CONST LPVOID lpParam)
{
 while (RTPSocketInit() == 0)
 Sleep(2000);
 
 while (1)
 {
 RTPSocketRecive();
 RTPPacketParser();
 ReleaseSemaphore(hSemaphoreRTP, 1, NULL);
 }
}
//------------------------------------------------------------------------------
DWORD WINAPI rtp_decode_Procedure(CONST LPVOID lpParam)
{
 port = param.Option.VideoPort;

 pAVPacket = av_packet_alloc();
 if (!pAVPacket)
 {
 MessageBox(NULL, L"ERROR Could not allocate pAVPacket", L"Init decoder error", MB_OK | MB_ICONERROR);
 exit(1);
 }
 av_init_packet(pAVPacket);

 /* find the MPEG-1 video decoder */
 pAVCodec = avcodec_find_decoder(AV_CODEC_ID_H264);
 if (!pAVCodec)
 {
 MessageBox(NULL, L"ERROR Codec not found", L"Init decoder error", MB_OK | MB_ICONERROR);
 exit(1);
 }

 pAVCodecParserContext = av_parser_init(pAVCodec->id);
 if (!pAVCodecParserContext)
 {
 MessageBox(NULL, L"ERROR Parser not found", L"Init decoder error", MB_OK | MB_ICONERROR);
 exit(1);
 }

 pAVCodecContext = avcodec_alloc_context3(pAVCodec);
 if (!pAVCodecContext) 
 {
 MessageBox(NULL, L"ERROR Could not allocate video codec context", L"Init decoder error", MB_OK | MB_ICONERROR);
 exit(1);
 }
 
 if (avcodec_open2(pAVCodecContext, pAVCodec, NULL) < 0)
 {
 MessageBox(NULL, L"ERROR Could not open codec", L"Init decoder error", MB_OK | MB_ICONERROR);
 exit(1);
 }

 pAVFrame = av_frame_alloc();
 if (!pAVFrame) 
 {
 MessageBox(NULL, L"ERROR Could not allocate video frame", L"Init decoder error", MB_OK | MB_ICONERROR);
 exit(1);
 } 
 
 while (FlagRTPActive)
 {
 if(port != param.Option.VideoPort)
 closesocket(RTPSocket);

 WaitForSingleObject(hSemaphoreRTP, 500); 
 Decode_NaluToAVFrameRGG();
 }

 avformat_free_context(pAVFormatContext);
 av_frame_free(&pAVFrame);
 avcodec_close(pAVCodecContext);
 av_packet_free(&pAVPacket);

 
 if (hTreadRTPDecode) CloseHandle(hTreadRTPDecode);

 return 0;
}

//------------------------------------------------------------------------------
char RTPSocketInit(void)
{ 
 sockaddr_in RTPSocketAddr;
 
 RTPSocketAddr.sin_family = AF_INET;
 RTPSocketAddr.sin_addr.s_addr = htonl(INADDR_ANY);
 RTPSocketAddr.sin_port = htons(param.Option.VideoPort);

 RTPSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
 if (RTPSocket == INVALID_SOCKET)
 {
 MessageBox(NULL, L"ERROR Invalid RTP Socket", L"UDP Socket", MB_OK | MB_ICONERROR);
 return 0;
 }

 int option = 12000;
 if (setsockopt(RTPSocket, SOL_SOCKET, SO_RCVBUF, (char*)&option, sizeof(option)) < 0)
 {
 printf("setsockopt failed\n");

 }

 /*option = TRUE;
 if (setsockopt(RTPSocket, SOL_SOCKET, SO_CONDITIONAL_ACCEPT, (char*)&option, sizeof(option)) < 0)
 {
 printf("setsockopt failed\n");

 }*/

 if (bind(RTPSocket, (sockaddr*)&RTPSocketAddr, sizeof(RTPSocketAddr)) == SOCKET_ERROR)
 {
 MessageBox(NULL, L"ERROR bind", L"UDP Socket", MB_OK | MB_ICONERROR);
 closesocket(RTPSocket);
 return 0;
 }
 return 1;
}

//------------------------------------------------------------------------------
char RTPSocketRecive(void)
{
 static char RecvBuf[2000];
 static int BufLen = 2000;

 int iResult = 0;
 struct sockaddr_in SenderAddr;
 int SenderAddrSize = sizeof(SenderAddr);
 TCHAR szErrorMsg[100];

 iResult = recvfrom(RTPSocket, RecvBuf, BufLen, 0, NULL, NULL);
 if (iResult == SOCKET_ERROR && FlagRTPActive == TRUE)
 {
 StringCchPrintf(szErrorMsg, 100, L"ERROR recvfrom Ошибка:%d", WSAGetLastError());
 MessageBox(NULL, szErrorMsg, L"UDP Socket", MB_OK | MB_ICONERROR);
 return -1;
 }

 packet.data = (unsigned char*)RecvBuf;
 packet.size = iResult;

 return 1;
}

//------------------------------------------------------------------------------
void RTPPacketParser(void)
{
 RTPHeader_DType RTPHeader;
 RTPData_DType NALU;
 unsigned char* buffer = packet.data;
 int pos = 0;
 static int count = 0;
 static short lastSequenceNumber = 0xFFFF;
 short type;
 char payload_header;

 //read rtp header
 memcpy(&RTPHeader, buffer, sizeof(RTPHeader));
 RTPHeader.sequence_number = BYTE2_SWAP(RTPHeader.sequence_number);
 pos += 12; 
 
 if (RTPHeader.X) {
 //profile extension
 short define;
 short length;
 length = buffer[pos + 3];//suppose not so long extension
 pos += 4;
 pos += (length * 4);
 }

 payload_header = buffer[pos];
 type = payload_header & 0x1f; //Тип полезной нагрузки RTP
 pos++;
 
 //STAP-A
 if (type == 24)
 { 
 while (pos < packet.size)
 {
 unsigned short NALU_size;
 memcpy(&NALU_size, buffer + pos, 2);
 NALU_size = BYTE2_SWAP(NALU_size);
 pos += 2;
 char NAL_header = buffer[pos];
 short NAL_type = NAL_header & 0x1f;

 if (NAL_type == 7) 
 {
 count++;
 //cout<<"SPS, sequence number: "</cout<<"PPS, sequence number: "</cout<<"end of sequence, sequence number: "< 0) 
 {
 NALU.data = (unsigned char*) malloc(NALU_size + 4);
 NALU.size = NALU_size + 4;
 memcpy(NALU.data, &inteval, 4);
 memcpy(NALU.data + 4, &buffer[pos], NALU_size);

 WaitForSingleObject(hMutexRTPRecive, INFINITE);
 q.push(NALU);
 ReleaseMutex(hMutexRTPRecive);
 }

 pos += NALU_size;
 }
 }
 //FU-A Fragmentation unit
 else if (type == 28)
 { 
 //FU header
 char FU_header = buffer[pos];
 bool fStart = FU_header & 0x80;
 bool fEnd = FU_header & 0x40;

 //NAL header
 char NAL_header = (payload_header & 0xe0) | (FU_header & 0x1f);
 short NAL_type = FU_header & 0x1f;
 if (NAL_type == 7) 
 {
 count++;
 //SPS
 }
 else if (NAL_type == 8) 
 {
 //PPS
 }
 else if (NAL_type == 10) 
 {
 //end of sequence
 }
 pos++;

 int size = packet.size - pos;
 
 if (count > 0)
 {
 if (fStart) 
 {
 if (FU_buffer.size != 0)
 {
 free(FU_buffer.data);
 FU_buffer.size = 0;
 }
 FU_buffer.data = (unsigned char*)malloc(size + 5);
 if (FU_buffer.data == NULL)
 return;
 FU_buffer.size = size + 5;
 memcpy(FU_buffer.data, &inteval, 4);
 memcpy(FU_buffer.data + 4, &NAL_header, 1);
 memcpy(FU_buffer.data + 5, buffer + pos, size);
 }
 else
 {
 unsigned char* temp = (unsigned char*)malloc(FU_buffer.size + size);
 memcpy(temp, FU_buffer.data, FU_buffer.size);
 memcpy(temp + FU_buffer.size, buffer + pos, size);
 if (FU_buffer.size != 0) free(FU_buffer.data);
 FU_buffer.data = temp;
 FU_buffer.size += size;
 }

 if (fEnd)
 {
 NALU.data = (unsigned char*)malloc(FU_buffer.size);
 NALU.size = FU_buffer.size;
 memcpy(NALU.data, FU_buffer.data, FU_buffer.size);

 WaitForSingleObject(hMutexRTPRecive, INFINITE);
 q.push(NALU);
 ReleaseMutex(hMutexRTPRecive);

 free(FU_buffer.data);
 FU_buffer.size = 0;
 }
 }
 
 }
 else 
 {
 //other type
 short NAL_type = type;
 if (NAL_type == 7) 
 {
 count++;
 //SPS
 }
 else if (NAL_type == 8) 
 {
 //PPS
 }
 else if (NAL_type == 10) 
 {
 //end of sequence
 }

 int size = packet.size - pos + 1;
 if (count > 0)
 {
 NALU.data = (unsigned char*)malloc(size+4);
 NALU.size = size + 4;
 memcpy(NALU.data, &inteval, 4);
 memcpy(NALU.data + 4, &buffer[12], size);

 WaitForSingleObject(hMutexRTPRecive, INFINITE);
 q.push(NALU);
 ReleaseMutex(hMutexRTPRecive);
 }
 }
}

//------------------------------------------------------------------------------
void Decode_NaluToAVFrameRGG()
{
 unsigned char cntNALU;
 int len = 0;
 static int size = 0;
 unsigned char* data = NULL;
 int ret;
 RTPData_DType NALU;

 av_frame_unref(pAVFrame);
 av_packet_unref(pAVPacket);

 while(1)
 {
 WaitForSingleObject(hMutexRTPRecive, INFINITE);
 if (q.empty())
 {
 ReleaseMutex(hMutexRTPRecive);
 break;
 }
 NALU = q.front();
 q.pop();
 ReleaseMutex(hMutexRTPRecive);

 data = NALU.data;
 size = NALU.size;

 while(size)
 { 
 len = av_parser_parse2(pAVCodecParserContext, pAVCodecContext, &pAVPacket->data, &pAVPacket->size,
 (uint8_t*)data, size,
 AV_NOPTS_VALUE, AV_NOPTS_VALUE, AV_NOPTS_VALUE);

 data = len ? data + len : data;
 size -= len;
 
 if (pAVPacket->size)
 {
 ret = avcodec_send_packet(pAVCodecContext, pAVPacket);

 if(ret == AVERROR_EOF)
 MessageBox(NULL, L"the codec has been fully flushed, and there will be no more output frames", L"avcodec_send_packet", MB_OK | MB_ICONERROR);

 if (ret < 0)
 {
 MessageBox(NULL, L"ERROR sending a packet for decoding", L"Decode", MB_OK | MB_ICONERROR);
 //exit(1);
 }

 while (ret >= 0) 
 {
 ret = avcodec_receive_frame(pAVCodecContext, pAVFrame);
 if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF)
 break;
 else if (ret < 0) {
 MessageBox(NULL, L"ERROR during decoding", L"Decode", MB_OK | MB_ICONERROR);
 //exit(1);
 }
 
 AVFrameRGG = av_frame_alloc(); 
 pSwsContext = sws_getContext(pAVCodecContext->width, pAVCodecContext->height, pAVCodecContext->pix_fmt,
 pAVCodecContext->width, pAVCodecContext->height, AV_PIX_FMT_RGB24, SWS_SPLINE,
 0, 0, 0);

 sws_scale_frame(pSwsContext, AVFrameRGG, pAVFrame);
 
 ImgBufferSet(AVFrameRGG->data[0], pAVCodecContext->height, pAVCodecContext->width, AVFrameRGG->linesize[0]);

 sws_freeContext(pSwsContext);
 av_frame_free(&AVFrameRGG);
 }
 }
 }
 free(NALU.data);
 NALU.size = 0;
 } 
}

</int></queue></iostream></chrono>

It's DECIDED


-
Anomalie #3537 (Fermé) : Réinstallation d’un site oblige à créer un nouvel admin (HTML5 effet de b...
28 août 2015, par realet RealETErreur de ma part : j’avais fait une mauvaise restauration, la base était vide.
Donc SPIP est génial :
- si la base est vide, les informations de login sont obligatoires
- sinon, non
\o/
Syndiquer tout le site
