Ejemplos de uref_block_iovec_unmap en C++ (Cpp)

Ejemplo n.º 1

Archivo: upipe_dveo_asi_sink.c Proyecto: cmassiot/upipe

static bool upipe_dveo_asi_sink_write(struct upipe *upipe, struct uref *uref,
        bool *reset_first_timestamp)
{
    struct upipe_dveo_asi_sink *upipe_dveo_asi_sink = upipe_dveo_asi_sink_from_upipe(upipe);
    for (;;) {
        int iovec_count = uref_block_iovec_count(uref, 0, -1);
        if (unlikely(iovec_count == -1)) {
            upipe_warn(upipe, "cannot read ubuf buffer");
            break;
        }
        if (unlikely(iovec_count == 0)) {
            break;
        }

        struct iovec iovecs[iovec_count];
        if (unlikely(!ubase_check(uref_block_iovec_read(uref, 0, -1,
                                                        iovecs)))) {
            upipe_warn(upipe, "cannot read ubuf buffer");
            break;
        }

        ssize_t ret = writev(upipe_dveo_asi_sink->fd, iovecs, iovec_count);
        uref_block_iovec_unmap(uref, 0, -1, iovecs);

        if (unlikely(ret == -1)) {
            switch (errno) {
                case EINTR:
                    continue;
                case EAGAIN:
#if EAGAIN != EWOULDBLOCK
                case EWOULDBLOCK:
#endif
                    //upipe_notice_va(upipe, "polling");
                    upipe_dveo_asi_sink_poll(upipe);
                    return false;
                default:
                    break;
            }
            upipe_warn_va(upipe, "write error to device %d (%m)", upipe_dveo_asi_sink->card_idx);
            upipe_dveo_asi_sink_set_upump(upipe, NULL);
            upipe_throw_sink_end(upipe);
            break;
        }

        size_t uref_size;
        if (ubase_check(uref_block_size(uref, &uref_size)) &&
            uref_size == ret) {
            /* wrote succeeded */
            *reset_first_timestamp = false;
            break;
        }
        uref_block_resize(uref, ret, -1);
    }

    return true;
}

Ejemplo n.º 2

Archivo: upipe_file_sink.c Proyecto: marcinklimek/upipe

/** @internal @This outputs data to the file sink.
 *
 * @param upipe description structure of the pipe
 * @param uref uref structure
 * @param upump_p reference to pump that generated the buffer
 * @return true if the uref was processed
 */
static bool upipe_fsink_output(struct upipe *upipe, struct uref *uref,
                               struct upump **upump_p)
{
    struct upipe_fsink *upipe_fsink = upipe_fsink_from_upipe(upipe);
    const char *def;
    if (unlikely(ubase_check(uref_flow_get_def(uref, &def)))) {
        uint64_t latency = 0;
        uref_clock_get_latency(uref, &latency);
        if (latency > upipe_fsink->latency)
            upipe_fsink->latency = latency;
        uref_free(uref);
        return true;
    }

    if (unlikely(upipe_fsink->fd == -1)) {
        uref_free(uref);
        upipe_warn(upipe, "received a buffer before opening a file");
        return true;
    }

    if (likely(upipe_fsink->uclock == NULL))
        goto write_buffer;

    uint64_t cr_sys = 0;
    if (unlikely(!ubase_check(uref_clock_get_cr_sys(uref, &cr_sys)))) {
        upipe_warn(upipe, "received non-dated buffer");
        goto write_buffer;
    }

    uint64_t now = uclock_now(upipe_fsink->uclock);
    cr_sys += upipe_fsink->latency;
    if (unlikely(now < cr_sys)) {
        upipe_fsink_wait_upump(upipe, cr_sys - now, upipe_fsink_watcher);
        return false;
    }

write_buffer:
    for ( ; ; ) {
        int iovec_count = uref_block_iovec_count(uref, 0, -1);
        if (unlikely(iovec_count == -1)) {
            uref_free(uref);
            upipe_warn(upipe, "cannot read ubuf buffer");
            break;
        }
        if (unlikely(iovec_count == 0)) {
            uref_free(uref);
            break;
        }

        struct iovec iovecs[iovec_count];
        if (unlikely(!ubase_check(uref_block_iovec_read(uref, 0, -1,
                                                        iovecs)))) {
            uref_free(uref);
            upipe_warn(upipe, "cannot read ubuf buffer");
            break;
        }

        ssize_t ret = writev(upipe_fsink->fd, iovecs, iovec_count);
        uref_block_iovec_unmap(uref, 0, -1, iovecs);

        if (unlikely(ret == -1)) {
            switch (errno) {
                case EINTR:
                    continue;
                case EAGAIN:
#if EAGAIN != EWOULDBLOCK
                case EWOULDBLOCK:
#endif
                    upipe_fsink_poll(upipe);
                    return false;
                case EBADF:
                case EFBIG:
                case EINVAL:
                case EIO:
                case ENOSPC:
                case EPIPE:
                default:
                    break;
            }
            uref_free(uref);
            upipe_warn_va(upipe, "write error to %s (%m)", upipe_fsink->path);
            upipe_fsink_set_upump(upipe, NULL);
            upipe_throw_sink_end(upipe);
            return true;
        }

        size_t uref_size;
        if (ubase_check(uref_block_size(uref, &uref_size)) &&
            uref_size == ret) {
            uref_free(uref);
            break;
        }
        uref_block_resize(uref, ret, -1);
    }
    return true;
}