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streamers / input.c @ 64d8326b

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/*
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 *  Copyright (c) 2010 Luca Abeni
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 *  Copyright (c) 2010 Csaba Kiraly
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 *
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 *  This is free software; see gpl-3.0.txt
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 */
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#include <sys/time.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <limits.h>
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#include <chunk.h>
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#include "input.h"
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#include "input-stream.h"
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#include "dbg.h"
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struct input_desc {
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  struct input_stream *s;
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  int id;
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  int interframe;
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  uint64_t start_time;
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  uint64_t first_ts;
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};
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struct input_desc *input_open(const char *fname, uint16_t flags)
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{
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  struct input_desc *res;
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  struct timeval tv;
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  res = malloc(sizeof(struct input_desc));
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  if (res == NULL) {
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    return NULL;
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  }
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  gettimeofday(&tv, NULL);
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  res->start_time = tv.tv_usec + tv.tv_sec * 1000000ULL;
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  res->first_ts = 0;
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  res->s = input_stream_open(fname, &res->interframe, flags);
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  if (res->s == NULL) {
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    free(res);
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    return NULL;
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  }
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  res->id = (res->start_time / res->interframe) % INT_MAX; //TODO: verify 32/64 bit
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  return res;
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}
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void input_close(struct input_desc *s)
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{
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  input_stream_close(s->s);
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  free(s);
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}
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int input_get(struct input_desc *s, struct chunk *c)
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{
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  struct timeval now;
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  int64_t delta;
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  c->data = chunkise(s->s, s->id, &c->size, &c->timestamp);
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  if (c->size == -1) {
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    return -1;
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  }
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  if (c->data) {
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    c->id = s->id++;
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  }
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  c->attributes_size = 0;
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  c->attributes = NULL;
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  if (s->first_ts == 0) {
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    s->first_ts = c->timestamp;
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  }
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  delta = c->timestamp - s->first_ts + s->interframe;
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  gettimeofday(&now, NULL);
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  delta = delta + s->start_time - now.tv_sec * 1000000ULL - now.tv_usec;
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  dprintf("Delta: %lld\n", delta);
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  dprintf("Generate Chunk[%d] (TS: %llu)\n", c->id, c->timestamp);
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  c->timestamp = now.tv_sec * 1000000ULL + now.tv_usec;
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  return delta > 0 ? delta : 0;
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}