Moved to gst-libs/ext/mplex

Original commit message from CVS:
Moved to gst-libs/ext/mplex

1 files changed, 0 insertions, 880 deletions

diff --git a/ext/mplex/yuv4mpeg.cc b/ext/mplex/yuv4mpeg.cc
deleted file mode 100644
index a9e1aebf..00000000
--- a/ext/mplex/yuv4mpeg.cc
+++ /dev/null
@@ -1,880 +0,0 @@
-/*
- *  yuv4mpeg.c:  Functions for reading and writing "new" YUV4MPEG streams
- *
- *  Copyright (C) 2001 Matthew J. Marjanovic <maddog@mir.com>
- *
- *
- *  This program is free software; you can redistribute it and/or
- *  modify it under the terms of the GNU General Public License
- *  as published by the Free Software Foundation; either version 2
- *  of the License, or (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
- *
- */
-
-#include <config.h>
-
-#include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include "yuv4mpeg.h"
-#include "yuv4mpeg_intern.h"
-#include "mjpeg_logging.h"
-
-
-static int _y4mparam_allow_unknown_tags = 1;	/* default is forgiveness */
-
-static void *(*_y4m_alloc) (size_t bytes) = malloc;
-static void (*_y4m_free) (void *ptr) = free;
-
-
-
-int
-y4m_allow_unknown_tags (int yn)
-{
-  int old = _y4mparam_allow_unknown_tags;
-
-  if (yn >= 0)
-    _y4mparam_allow_unknown_tags = (yn) ? 1 : 0;
-  return old;
-}
-
-
-
-/*************************************************************************
- *
- * Convenience functions for fd read/write
- *
- *   - guaranteed to transfer entire payload (or fail)
- *   - returns:
- *               0 on complete success
- *               +(# of remaining bytes) on eof (for y4m_read)
- *               -(# of rem. bytes) on error (and ERRNO should be set)
- *     
- *************************************************************************/
-
-
-ssize_t
-y4m_read (int fd, void *buf, size_t len)
-{
-  ssize_t n;
-  uint8_t *ptr = (uint8_t *) buf;
-
-  while (len > 0) {
-    n = read (fd, ptr, len);
-    if (n <= 0) {
-      /* return amount left to read */
-      if (n == 0)
-	return len;		/* n == 0 --> eof */
-      else
-	return -len;		/* n < 0 --> error */
-    }
-    ptr += n;
-    len -= n;
-  }
-  return 0;
-}
-
-
-ssize_t
-y4m_write (int fd, const void *buf, size_t len)
-{
-  ssize_t n;
-  const uint8_t *ptr = (const uint8_t *) buf;
-
-  while (len > 0) {
-    n = write (fd, ptr, len);
-    if (n <= 0)
-      return -len;		/* return amount left to write */
-    ptr += n;
-    len -= n;
-  }
-  return 0;
-}
-
-
-
-/*************************************************************************
- *
- * "Extra tags" handling
- *
- *************************************************************************/
-
-
-static char *
-y4m_new_xtag (void)
-{
-  return (char *) _y4m_alloc (Y4M_MAX_XTAG_SIZE * sizeof (char));
-}
-
-
-void
-y4m_init_xtag_list (y4m_xtag_list_t * xtags)
-{
-  int i;
-
-  xtags->count = 0;
-  for (i = 0; i < Y4M_MAX_XTAGS; i++) {
-    xtags->tags[i] = NULL;
-  }
-}
-
-
-void
-y4m_fini_xtag_list (y4m_xtag_list_t * xtags)
-{
-  int i;
-
-  for (i = 0; i < Y4M_MAX_XTAGS; i++) {
-    if (xtags->tags[i] != NULL) {
-      _y4m_free (xtags->tags[i]);
-      xtags->tags[i] = NULL;
-    }
-  }
-  xtags->count = 0;
-}
-
-
-void
-y4m_copy_xtag_list (y4m_xtag_list_t * dest, const y4m_xtag_list_t * src)
-{
-  int i;
-
-  for (i = 0; i < src->count; i++) {
-    if (dest->tags[i] == NULL)
-      dest->tags[i] = y4m_new_xtag ();
-    strncpy (dest->tags[i], src->tags[i], Y4M_MAX_XTAG_SIZE);
-  }
-  dest->count = src->count;
-}
-
-
-
-static int
-y4m_snprint_xtags (char *s, int maxn, const y4m_xtag_list_t * xtags)
-{
-  int i, room;
-
-  for (i = 0, room = maxn - 1; i < xtags->count; i++) {
-    int n = snprintf (s, room + 1, " %s", xtags->tags[i]);
-
-    if ((n < 0) || (n > room))
-      return Y4M_ERR_HEADER;
-    s += n;
-    room -= n;
-  }
-  s[0] = '\n';			/* finish off header with newline */
-  s[1] = '\0';			/* ...and end-of-string           */
-  return Y4M_OK;
-}
-
-
-int
-y4m_xtag_count (const y4m_xtag_list_t * xtags)
-{
-  return xtags->count;
-}
-
-
-const char *
-y4m_xtag_get (const y4m_xtag_list_t * xtags, int n)
-{
-  if (n >= xtags->count)
-    return NULL;
-  else
-    return xtags->tags[n];
-}
-
-
-int
-y4m_xtag_add (y4m_xtag_list_t * xtags, const char *tag)
-{
-  if (xtags->count >= Y4M_MAX_XTAGS)
-    return Y4M_ERR_XXTAGS;
-  if (xtags->tags[xtags->count] == NULL)
-    xtags->tags[xtags->count] = y4m_new_xtag ();
-  strncpy (xtags->tags[xtags->count], tag, Y4M_MAX_XTAG_SIZE);
-  (xtags->count)++;
-  return Y4M_OK;
-}
-
-
-int
-y4m_xtag_remove (y4m_xtag_list_t * xtags, int n)
-{
-  int i;
-  char *q;
-
-  if ((n < 0) || (n >= xtags->count))
-    return Y4M_ERR_RANGE;
-  q = xtags->tags[n];
-  for (i = n; i < (xtags->count - 1); i++)
-    xtags->tags[i] = xtags->tags[i + 1];
-  xtags->tags[i] = q;
-  (xtags->count)--;
-  return Y4M_OK;
-}
-
-
-int
-y4m_xtag_clearlist (y4m_xtag_list_t * xtags)
-{
-  xtags->count = 0;
-  return Y4M_OK;
-}
-
-
-int
-y4m_xtag_addlist (y4m_xtag_list_t * dest, const y4m_xtag_list_t * src)
-{
-  int i, j;
-
-  if ((dest->count + src->count) > Y4M_MAX_XTAGS)
-    return Y4M_ERR_XXTAGS;
-  for (i = dest->count, j = 0; j < src->count; i++, j++) {
-    if (dest->tags[i] == NULL)
-      dest->tags[i] = y4m_new_xtag ();
-    strncpy (dest->tags[i], src->tags[i], Y4M_MAX_XTAG_SIZE);
-  }
-  dest->count += src->count;
-  return Y4M_OK;
-}
-
-
-/*************************************************************************
- *
- * Creators/destructors for y4m_*_info_t structures
- *
- *************************************************************************/
-
-
-void
-y4m_init_stream_info (y4m_stream_info_t * info)
-{
-  if (info == NULL)
-    return;
-  /* initialize info */
-  info->width = Y4M_UNKNOWN;
-  info->height = Y4M_UNKNOWN;
-  info->interlace = Y4M_UNKNOWN;
-  info->framerate = y4m_fps_UNKNOWN;
-  info->sampleaspect = y4m_sar_UNKNOWN;
-  y4m_init_xtag_list (&(info->x_tags));
-}
-
-
-void
-y4m_copy_stream_info (y4m_stream_info_t * dest, const y4m_stream_info_t * src)
-{
-  if ((dest == NULL) || (src == NULL))
-    return;
-  /* copy info */
-  dest->width = src->width;
-  dest->height = src->height;
-  dest->interlace = src->interlace;
-  dest->framerate = src->framerate;
-  dest->sampleaspect = src->sampleaspect;
-  dest->framelength = src->framelength;
-  y4m_copy_xtag_list (&(dest->x_tags), &(src->x_tags));
-}
-
-
-void
-y4m_fini_stream_info (y4m_stream_info_t * info)
-{
-  if (info == NULL)
-    return;
-  y4m_fini_xtag_list (&(info->x_tags));
-}
-
-
-void
-y4m_si_set_width (y4m_stream_info_t * si, int width)
-{
-  si->width = width;
-  si->framelength = (si->height * si->width) * 3 / 2;
-}
-
-int
-y4m_si_get_width (const y4m_stream_info_t * si)
-{
-  return si->width;
-}
-
-void
-y4m_si_set_height (y4m_stream_info_t * si, int height)
-{
-  si->height = height;
-  si->framelength = (si->height * si->width) * 3 / 2;
-}
-
-int
-y4m_si_get_height (const y4m_stream_info_t * si)
-{
-  return si->height;
-}
-
-void
-y4m_si_set_interlace (y4m_stream_info_t * si, int interlace)
-{
-  si->interlace = interlace;
-}
-
-int
-y4m_si_get_interlace (const y4m_stream_info_t * si)
-{
-  return si->interlace;
-}
-
-void
-y4m_si_set_framerate (y4m_stream_info_t * si, y4m_ratio_t framerate)
-{
-  si->framerate = framerate;
-}
-
-y4m_ratio_t
-y4m_si_get_framerate (const y4m_stream_info_t * si)
-{
-  return si->framerate;
-}
-
-void
-y4m_si_set_sampleaspect (y4m_stream_info_t * si, y4m_ratio_t sar)
-{
-  si->sampleaspect = sar;
-}
-
-y4m_ratio_t
-y4m_si_get_sampleaspect (const y4m_stream_info_t * si)
-{
-  return si->sampleaspect;
-}
-
-int
-y4m_si_get_framelength (const y4m_stream_info_t * si)
-{
-  return si->framelength;
-}
-
-y4m_xtag_list_t *
-y4m_si_xtags (y4m_stream_info_t * si)
-{
-  return &(si->x_tags);
-}
-
-
-
-void
-y4m_init_frame_info (y4m_frame_info_t * info)
-{
-  if (info == NULL)
-    return;
-  /* initialize info */
-  y4m_init_xtag_list (&(info->x_tags));
-}
-
-
-void
-y4m_copy_frame_info (y4m_frame_info_t * dest, const y4m_frame_info_t * src)
-{
-  if ((dest == NULL) || (src == NULL))
-    return;
-  /* copy info */
-  y4m_copy_xtag_list (&(dest->x_tags), &(src->x_tags));
-}
-
-
-void
-y4m_fini_frame_info (y4m_frame_info_t * info)
-{
-  if (info == NULL)
-    return;
-  y4m_fini_xtag_list (&(info->x_tags));
-}
-
-
-
-/*************************************************************************
- *
- * Tag parsing 
- *
- *************************************************************************/
-
-int
-y4m_parse_stream_tags (char *s, y4m_stream_info_t * i)
-{
-  char *token, *value;
-  char tag;
-  int err;
-
-  /* parse fields */
-  for (token = strtok (s, Y4M_DELIM); token != NULL; token = strtok (NULL, Y4M_DELIM)) {
-    if (token[0] == '\0')
-      continue;			/* skip empty strings */
-    tag = token[0];
-    value = token + 1;
-    switch (tag) {
-      case 'W':		/* width */
-	i->width = atoi (value);
-	if (i->width <= 0)
-	  return Y4M_ERR_RANGE;
-	break;
-      case 'H':		/* height */
-	i->height = atoi (value);
-	if (i->height <= 0)
-	  return Y4M_ERR_RANGE;
-	break;
-      case 'F':		/* frame rate (fps) */
-	if ((err = y4m_parse_ratio (&(i->framerate), value)) != Y4M_OK)
-	  return err;
-	if (i->framerate.n < 0)
-	  return Y4M_ERR_RANGE;
-	break;
-      case 'I':		/* interlacing */
-	switch (value[0]) {
-	  case 'p':
-	    i->interlace = Y4M_ILACE_NONE;
-	    break;
-	  case 't':
-	    i->interlace = Y4M_ILACE_TOP_FIRST;
-	    break;
-	  case 'b':
-	    i->interlace = Y4M_ILACE_BOTTOM_FIRST;
-	    break;
-	  case '?':
-	  default:
-	    i->interlace = Y4M_UNKNOWN;
-	    break;
-	}
-	break;
-      case 'A':		/* sample (pixel) aspect ratio */
-	if ((err = y4m_parse_ratio (&(i->sampleaspect), value)) != Y4M_OK)
-	  return err;
-	if (i->sampleaspect.n < 0)
-	  return Y4M_ERR_RANGE;
-	break;
-      case 'X':		/* 'X' meta-tag */
-	if ((err = y4m_xtag_add (&(i->x_tags), token)) != Y4M_OK)
-	  return err;
-	break;
-      default:
-	/* possible error on unknown options */
-	if (_y4mparam_allow_unknown_tags) {
-	  /* unknown tags ok:  store in xtag list and warn... */
-	  if ((err = y4m_xtag_add (&(i->x_tags), token)) != Y4M_OK)
-	    return err;
-	  mjpeg_warn ("Unknown stream tag encountered:  '%s'", token);
-	} else {
-	  /* unknown tags are *not* ok */
-	  return Y4M_ERR_BADTAG;
-	}
-	break;
-    }
-  }
-  /* Error checking... width and height must be known since we can't
-   * parse without them
-   */
-  if (i->width == Y4M_UNKNOWN || i->height == Y4M_UNKNOWN)
-    return Y4M_ERR_HEADER;
-  /* ta da!  done. */
-  return Y4M_OK;
-}
-
-
-
-static int
-y4m_parse_frame_tags (char *s, y4m_frame_info_t * i)
-{
-  char *token, *value;
-  char tag;
-  int err;
-
-  /* parse fields */
-  for (token = strtok (s, Y4M_DELIM); token != NULL; token = strtok (NULL, Y4M_DELIM)) {
-    if (token[0] == '\0')
-      continue;			/* skip empty strings */
-    tag = token[0];
-    value = token + 1;
-    switch (tag) {
-      case 'X':		/* 'X' meta-tag */
-	if ((err = y4m_xtag_add (&(i->x_tags), token)) != Y4M_OK)
-	  return err;
-	break;
-      default:
-	/* possible error on unknown options */
-	if (_y4mparam_allow_unknown_tags) {
-	  /* unknown tags ok:  store in xtag list and warn... */
-	  if ((err = y4m_xtag_add (&(i->x_tags), token)) != Y4M_OK)
-	    return err;
-	  mjpeg_warn ("Unknown frame tag encountered:  '%s'", token);
-	} else {
-	  /* unknown tags are *not* ok */
-	  return Y4M_ERR_BADTAG;
-	}
-	break;
-    }
-  }
-  /* ta da!  done. */
-  return Y4M_OK;
-}
-
-
-
-
-
-/*************************************************************************
- *
- * Read/Write stream header
- *
- *************************************************************************/
-
-
-int
-y4m_read_stream_header (int fd, y4m_stream_info_t * i)
-{
-  char line[Y4M_LINE_MAX];
-  char *p;
-  int n;
-  int err;
-
-  /* read the header line */
-  for (n = 0, p = line; n < Y4M_LINE_MAX; n++, p++) {
-    if (read (fd, p, 1) < 1)
-      return Y4M_ERR_SYSTEM;
-    if (*p == '\n') {
-      *p = '\0';		/* Replace linefeed by end of string */
-      break;
-    }
-  }
-  if (n >= Y4M_LINE_MAX)
-    return Y4M_ERR_HEADER;
-  /* look for keyword in header */
-  if (strncmp (line, Y4M_MAGIC, strlen (Y4M_MAGIC)))
-    return Y4M_ERR_MAGIC;
-  if ((err = y4m_parse_stream_tags (line + strlen (Y4M_MAGIC), i)) != Y4M_OK)
-    return err;
-
-  i->framelength = (i->height * i->width) * 3 / 2;
-  return Y4M_OK;
-}
-
-
-
-int
-y4m_write_stream_header (int fd, const y4m_stream_info_t * i)
-{
-  char s[Y4M_LINE_MAX + 1];
-  int n;
-  int err;
-  y4m_ratio_t rate = i->framerate;
-  y4m_ratio_t aspect = i->sampleaspect;
-
-  y4m_ratio_reduce (&rate);
-  y4m_ratio_reduce (&aspect);
-  n = snprintf (s, sizeof (s), "%s W%d H%d F%d:%d I%s A%d:%d",
-		Y4M_MAGIC,
-		i->width,
-		i->height,
-		rate.n, rate.d,
-		(i->interlace == Y4M_ILACE_NONE) ? "p" :
-		(i->interlace == Y4M_ILACE_TOP_FIRST) ? "t" :
-		(i->interlace == Y4M_ILACE_BOTTOM_FIRST) ? "b" : "?", aspect.n, aspect.d);
-  if ((n < 0) || (n > Y4M_LINE_MAX))
-    return Y4M_ERR_HEADER;
-  if ((err = y4m_snprint_xtags (s + n, sizeof (s) - n - 1, &(i->x_tags)))
-      != Y4M_OK)
-    return err;
-  /* non-zero on error */
-  return (y4m_write (fd, s, strlen (s)) ? Y4M_ERR_SYSTEM : Y4M_OK);
-}
-
-
-
-
-
-/*************************************************************************
- *
- * Read/Write frame header
- *
- *************************************************************************/
-
-int
-y4m_read_frame_header (int fd, y4m_frame_info_t * i)
-{
-  char line[Y4M_LINE_MAX];
-  char *p;
-  int n;
-  ssize_t remain;
-
-  /* This is more clever than read_stream_header...
-     Try to read "FRAME\n" all at once, and don't try to parse
-     if nothing else is there...
-   */
-  remain = y4m_read (fd, line, sizeof (Y4M_FRAME_MAGIC) - 1 + 1);	/* -'\0', +'\n' */
-  if (remain < 0)
-    return Y4M_ERR_SYSTEM;
-  if (remain > 0) {
-    /* A clean EOF should end exactly at a frame-boundary */
-    if (remain == sizeof (Y4M_FRAME_MAGIC))
-      return Y4M_ERR_EOF;
-    else
-      return Y4M_ERR_BADEOF;
-  }
-  if (strncmp (line, Y4M_FRAME_MAGIC, sizeof (Y4M_FRAME_MAGIC) - 1))
-    return Y4M_ERR_MAGIC;
-  if (line[sizeof (Y4M_FRAME_MAGIC) - 1] == '\n')
-    return Y4M_OK;		/* done -- no tags:  that was the end-of-line. */
-
-  if (line[sizeof (Y4M_FRAME_MAGIC) - 1] != Y4M_DELIM[0]) {
-    return Y4M_ERR_MAGIC;	/* wasn't a space -- what was it? */
-  }
-
-  /* proceed to get the tags... (overwrite the magic) */
-  for (n = 0, p = line; n < Y4M_LINE_MAX; n++, p++) {
-    if (y4m_read (fd, p, 1))
-      return Y4M_ERR_SYSTEM;
-    if (*p == '\n') {
-      *p = '\0';		/* Replace linefeed by end of string */
-      break;
-    }
-  }
-  if (n >= Y4M_LINE_MAX)
-    return Y4M_ERR_HEADER;
-  /* non-zero on error */
-  return y4m_parse_frame_tags (line, i);
-}
-
-
-int
-y4m_write_frame_header (int fd, const y4m_frame_info_t * i)
-{
-  char s[Y4M_LINE_MAX + 1];
-  int n;
-  int err;
-
-  n = snprintf (s, sizeof (s), "%s", Y4M_FRAME_MAGIC);
-  if ((n < 0) || (n > Y4M_LINE_MAX))
-    return Y4M_ERR_HEADER;
-  if ((err = y4m_snprint_xtags (s + n, sizeof (s) - n - 1, &(i->x_tags)))
-      != Y4M_OK)
-    return err;
-  /* non-zero on error */
-  return (y4m_write (fd, s, strlen (s)) ? Y4M_ERR_SYSTEM : Y4M_OK);
-}
-
-
-
-/*************************************************************************
- *
- * Read/Write entire frame
- *
- *************************************************************************/
-
-int
-y4m_read_frame (int fd, const y4m_stream_info_t * si, y4m_frame_info_t * fi, uint8_t * const yuv[3])
-{
-  int err;
-  int w = si->width;
-  int h = si->height;
-
-  /* Read frame header */
-  if ((err = y4m_read_frame_header (fd, fi)) != Y4M_OK)
-    return err;
-  /* Read luminance scanlines */
-  if (y4m_read (fd, yuv[0], w * h))
-    return Y4M_ERR_SYSTEM;
-  /* Read chrominance scanlines */
-  if (y4m_read (fd, yuv[1], w * h / 4))
-    return Y4M_ERR_SYSTEM;
-  if (y4m_read (fd, yuv[2], w * h / 4))
-    return Y4M_ERR_SYSTEM;
-
-  return Y4M_OK;
-}
-
-
-
-
-int
-y4m_write_frame (int fd, const y4m_stream_info_t * si,
-		 const y4m_frame_info_t * fi, uint8_t * const yuv[3])
-{
-  int err;
-  int w = si->width;
-  int h = si->height;
-
-  /* Write frame header */
-  if ((err = y4m_write_frame_header (fd, fi)) != Y4M_OK)
-    return err;
-  /* Write luminance,chrominance scanlines */
-  if (y4m_write (fd, yuv[0], w * h) ||
-      y4m_write (fd, yuv[1], w * h / 4) || y4m_write (fd, yuv[2], w * h / 4))
-    return Y4M_ERR_SYSTEM;
-  return Y4M_OK;
-}
-
-
-
-/*************************************************************************
- *
- * Read/Write entire frame, (de)interleaved (to)from two separate fields
- *
- *************************************************************************/
-
-
-int
-y4m_read_fields (int fd, const y4m_stream_info_t * si, y4m_frame_info_t * fi,
-		 uint8_t * const upper_field[3], uint8_t * const lower_field[3])
-{
-  int i, y, err;
-  int width = si->width;
-  int height = si->height;
-
-  /* Read frame header */
-  if ((err = y4m_read_frame_header (fd, fi)) != Y4M_OK)
-    return err;
-  /* Read Y', Cb, and Cr planes */
-  for (i = 0; i < 3; i++) {
-    uint8_t *srctop = upper_field[i];
-    uint8_t *srcbot = lower_field[i];
-
-    /* alternately write one line from each */
-    for (y = 0; y < height; y += 2) {
-      if (y4m_read (fd, srctop, width))
-	return Y4M_ERR_SYSTEM;
-      srctop += width;
-      if (y4m_read (fd, srcbot, width))
-	return Y4M_ERR_SYSTEM;
-      srcbot += width;
-    }
-    /* for chroma, width/height are half as big */
-    if (i == 0) {
-      width /= 2;
-      height /= 2;
-    }
-  }
-  return Y4M_OK;
-}
-
-
-
-int
-y4m_write_fields (int fd, const y4m_stream_info_t * si,
-		  const y4m_frame_info_t * fi,
-		  uint8_t * const upper_field[3], uint8_t * const lower_field[3])
-{
-  int i, y, err;
-  int width = si->width;
-  int height = si->height;
-
-  /* Write frame header */
-  if ((err = y4m_write_frame_header (fd, fi)) != Y4M_OK)
-    return err;
-  /* Write Y', Cb, and Cr planes */
-  for (i = 0; i < 3; i++) {
-    uint8_t *srctop = upper_field[i];
-    uint8_t *srcbot = lower_field[i];
-
-    /* alternately write one line from each */
-    for (y = 0; y < height; y += 2) {
-      if (y4m_write (fd, srctop, width))
-	return Y4M_ERR_SYSTEM;
-      srctop += width;
-      if (y4m_write (fd, srcbot, width))
-	return Y4M_ERR_SYSTEM;
-      srcbot += width;
-    }
-    /* for chroma, width/height are half as big */
-    if (i == 0) {
-      width /= 2;
-      height /= 2;
-    }
-  }
-  return Y4M_OK;
-}
-
-
-
-/*************************************************************************
- *
- * Handy logging of stream info
- *
- *************************************************************************/
-
-void
-y4m_log_stream_info (log_level_t level, const char *prefix, const y4m_stream_info_t * i)
-{
-  char s[256];
-
-  snprintf (s, sizeof (s), "  frame size:  ");
-  if (i->width == Y4M_UNKNOWN)
-    snprintf (s + strlen (s), sizeof (s) - strlen (s), "(?)x");
-  else
-    snprintf (s + strlen (s), sizeof (s) - strlen (s), "%dx", i->width);
-  if (i->height == Y4M_UNKNOWN)
-    snprintf (s + strlen (s), sizeof (s) - strlen (s), "(?) pixels ");
-  else
-    snprintf (s + strlen (s), sizeof (s) - strlen (s), "%d pixels ", i->height);
-  if (i->framelength == Y4M_UNKNOWN)
-    snprintf (s + strlen (s), sizeof (s) - strlen (s), "(? bytes)");
-  else
-    snprintf (s + strlen (s), sizeof (s) - strlen (s), "(%d bytes)", i->framelength);
-  mjpeg_log (level, "%s%s", prefix, s);
-  if ((i->framerate.n == 0) && (i->framerate.d == 0))
-    mjpeg_log (level, "%s  frame rate:  ??? fps", prefix);
-  else
-    mjpeg_log (level, "%s  frame rate:  %d/%d fps (~%f)", prefix,
-	       i->framerate.n, i->framerate.d, (double) i->framerate.n / (double) i->framerate.d);
-  mjpeg_log (level, "%s   interlace:  %s", prefix,
-	     (i->interlace == Y4M_ILACE_NONE) ? "none/progressive" :
-	     (i->interlace == Y4M_ILACE_TOP_FIRST) ? "top-field-first" :
-	     (i->interlace == Y4M_ILACE_BOTTOM_FIRST) ? "bottom-field-first" : "anyone's guess");
-  if ((i->sampleaspect.n == 0) && (i->sampleaspect.d == 0))
-    mjpeg_log (level, "%ssample aspect ratio:  ?:?", prefix);
-  else
-    mjpeg_log (level, "%ssample aspect ratio:  %d:%d", prefix,
-	       i->sampleaspect.n, i->sampleaspect.d);
-}
-
-
-/*************************************************************************
- *
- * Convert error code to string
- *
- *************************************************************************/
-
-const char *
-y4m_strerr (int err)
-{
-  switch (err) {
-    case Y4M_OK:
-      return "no error";
-    case Y4M_ERR_RANGE:
-      return "parameter out of range";
-    case Y4M_ERR_SYSTEM:
-      return "system error (failed read/write)";
-    case Y4M_ERR_HEADER:
-      return "bad stream or frame header";
-    case Y4M_ERR_BADTAG:
-      return "unknown header tag";
-    case Y4M_ERR_MAGIC:
-      return "bad header magic";
-    case Y4M_ERR_XXTAGS:
-      return "too many xtags";
-    case Y4M_ERR_EOF:
-      return "end-of-file";
-    case Y4M_ERR_BADEOF:
-      return "stream ended unexpectedly (EOF)";
-    default:
-      return "unknown error code";
-  }
-}