webm_video_source.h

/*
 *  Copyright (c) 2012 The WebM project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */
#ifndef TEST_WEBM_VIDEO_SOURCE_H_
#define TEST_WEBM_VIDEO_SOURCE_H_
#include <cstdarg>
#include <cstdio>
#include <cstdlib>
#include <new>
#include <string>
#include "third_party/nestegg/include/nestegg/nestegg.h"
#include "test/video_source.h"

namespace libvpx_test {

static int
nestegg_read_cb(void *buffer, size_t length, void *userdata) {
  FILE *f = reinterpret_cast<FILE *>(userdata);

  if (fread(buffer, 1, length, f) < length) {
    if (ferror(f))
      return -1;
    if (feof(f))
      return 0;
  }
  return 1;
}


static int
nestegg_seek_cb(int64_t offset, int whence, void *userdata) {
  FILE *f = reinterpret_cast<FILE *>(userdata);
  switch (whence) {
    case NESTEGG_SEEK_SET:
      whence = SEEK_SET;
      break;
    case NESTEGG_SEEK_CUR:
      whence = SEEK_CUR;
      break;
    case NESTEGG_SEEK_END:
      whence = SEEK_END;
      break;
  };
  return fseek(f, (long)offset, whence) ? -1 : 0;
}


static int64_t
nestegg_tell_cb(void *userdata) {
  FILE *f = reinterpret_cast<FILE *>(userdata);
  return ftell(f);
}


static void
nestegg_log_cb(nestegg *context, unsigned int severity, char const *format,
               ...) {
  va_list ap;

  va_start(ap, format);
  vfprintf(stderr, format, ap);
  fprintf(stderr, "\n");
  va_end(ap);
}