[FFmpeg-devel] Register protocol

[Phuoc Do]

Hello,

I am trying to use ffmpeg to decode stream sent over UDP. I register a new
protocol and have ffmpeg decode using this protocol. However,
av_open_input_file cannot decode the mpegts stream. With the code below, I
would get this output in stdout:

proto_open
proto_read
proto_read
proto_seek
seek to 0 - whence = 0
proto_read
proto_read
/* proto_read forever */

I use VLC to send a UDP stream encapsulated in MPEG-TS. I tried to look at
udp.c to find the answers but "ffplay udp://" hangs as well. Does ffmpeg
currently support MPEG-TS input?

Thanks,
Phuoc

Protocol.h
===
int proto_open(URLContext *h, const char *pseudofilename, int flags);
int proto_read(URLContext *h, unsigned char *buf, int size);
int proto_write(URLContext *h, unsigned char *buf, int size);
offset_t proto_seek(URLContext *h, offset_t pos, int whence);
int proto_close(URLContext* h);

static URLProtocol proto_protocol = {
    "proto",
    proto_open,
    proto_read,
    proto_write,
    proto_seek,
    proto_close
};
===
Protocol.cpp

int proto_open(URLContext *h, const char *pseudofilename, int flags)
{
    printf("proto_open\n");
    /* init UDP socket */
}

int proto_read(URLContext *h, unsigned char *buf, int size)
{
    printf("proto_read\n");
    socklen_t from_len;
    int len = 0;

    unsigned char *buf_ptr = buf;

    from_len = sizeof(my_addr);
    len = recvfrom (sockfd, buf, size, 0,
                     (struct sockaddr *)&my_addr, &from_len);

    return len;
}

int proto_write(URLContext *h, unsigned char *buf, int size)
{
    printf("proto_write\n");
}

offset_t proto_seek(URLContext *h, offset_t pos, int whence)
{
    printf("proto_seek\n");
    printf("seek to %i - whence = %i\n", pos, whence);
    return 1;
}

int proto_close(URLContext* h)
{
    printf("proto_close\n");
    /* close socket */
    return 0;
}