gstavidemux.c 59.2 KB
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/* GStreamer
 * Copyright (C) <1999> Erik Walthinsen <omega@temple-baptist.com>
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 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */


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/* #define GST_DEBUG_ENABLED */
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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
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#include <string.h>

#include "gstavidemux.h"

/* elementfactory information */
static GstElementDetails gst_avi_demux_details = {
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  "Avi demuxer",
  "Codec/Demuxer",
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  "LGPL",
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  "Demultiplex an avi file into audio and video",
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  VERSION,
  "Erik Walthinsen <omega@cse.ogi.edu>\n"
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  "Wim Taymans <wim.taymans@chello.be>",
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  "(C) 1999",
};

/* AviDemux signals and args */
enum {
  /* FILL ME */
  LAST_SIGNAL
};

enum {
  ARG_0,
  ARG_BITRATE,
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  ARG_METADATA,
  ARG_STREAMINFO,
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  /* FILL ME */
};

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GST_PAD_TEMPLATE_FACTORY (sink_templ,
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  "sink",
  GST_PAD_SINK,
  GST_PAD_ALWAYS,
  GST_CAPS_NEW (
    "avidemux_sink",
    "video/avi",
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      NULL
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  )
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);

static void 	gst_avi_demux_class_init	(GstAviDemuxClass *klass);
static void 	gst_avi_demux_init		(GstAviDemux *avi_demux);

static void 	gst_avi_demux_loop 		(GstElement  *element);

static gboolean gst_avi_demux_send_event 	(GstElement  *element,
						 GstEvent    *event);

static const GstEventMask *
		gst_avi_demux_get_event_mask 	(GstPad      *pad);
static gboolean gst_avi_demux_handle_src_event 	(GstPad      *pad,
						 GstEvent    *event);
static const GstFormat *
		gst_avi_demux_get_src_formats 	(GstPad      *pad); 
static const GstQueryType *
		gst_avi_demux_get_src_query_types (GstPad    *pad);
static gboolean gst_avi_demux_handle_src_query 	(GstPad      *pad,
						 GstQueryType type, 
						 GstFormat   *format,
						 gint64      *value);
static gboolean gst_avi_demux_src_convert 	(GstPad      *pad,
						 GstFormat    src_format,
						 gint64       src_value,
	        	          		 GstFormat   *dest_format,
						 gint64      *dest_value);
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static GstElementStateReturn
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		gst_avi_demux_change_state 	(GstElement  *element);
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static void     gst_avi_demux_get_property      (GObject     *object,
						 guint        prop_id, 	
						 GValue      *value,
						 GParamSpec  *pspec);
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static GstPadTemplate *videosrctempl, *audiosrctempl;
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static GstElementClass *parent_class = NULL;
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/*static guint gst_avi_demux_signals[LAST_SIGNAL] = { 0 }; */
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GType
gst_avi_demux_get_type(void) 
{
  static GType avi_demux_type = 0;

  if (!avi_demux_type) {
    static const GTypeInfo avi_demux_info = {
      sizeof(GstAviDemuxClass),      
      NULL,
      NULL,
      (GClassInitFunc)gst_avi_demux_class_init,
      NULL,
      NULL,
      sizeof(GstAviDemux),
      0,
      (GInstanceInitFunc)gst_avi_demux_init,
    };
    avi_demux_type = g_type_register_static(GST_TYPE_ELEMENT, "GstAviDemux", &avi_demux_info, 0);
  }
  return avi_demux_type;
}

static void
gst_avi_demux_class_init (GstAviDemuxClass *klass) 
{
  GObjectClass *gobject_class;
  GstElementClass *gstelement_class;

  gobject_class = (GObjectClass*)klass;
  gstelement_class = (GstElementClass*)klass;

  g_object_class_install_property (G_OBJECT_CLASS(klass), ARG_BITRATE,
    g_param_spec_long ("bitrate","bitrate","bitrate",
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                       G_MINLONG, G_MAXLONG, 0, G_PARAM_READABLE)); /* CHECKME */
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  g_object_class_install_property (gobject_class, ARG_METADATA,
    g_param_spec_boxed ("metadata", "Metadata", "Metadata",
                        GST_TYPE_CAPS, G_PARAM_READABLE));
  g_object_class_install_property (gobject_class, ARG_STREAMINFO,
    g_param_spec_boxed ("streaminfo", "Streaminfo", "Streaminfo",
                        GST_TYPE_CAPS, G_PARAM_READABLE));
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  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
  
  gobject_class->get_property = gst_avi_demux_get_property;
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  gstelement_class->change_state = gst_avi_demux_change_state;
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  gstelement_class->send_event = gst_avi_demux_send_event;
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}

static void 
gst_avi_demux_init (GstAviDemux *avi_demux) 
{
  GST_FLAG_SET (avi_demux, GST_ELEMENT_EVENT_AWARE);
				
  avi_demux->sinkpad = gst_pad_new_from_template (
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		  GST_PAD_TEMPLATE_GET (sink_templ), "sink");
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  gst_element_add_pad (GST_ELEMENT (avi_demux), avi_demux->sinkpad);

  gst_element_set_loop_function (GST_ELEMENT (avi_demux), gst_avi_demux_loop);
}

static gboolean
gst_avi_demux_avih (GstAviDemux *avi_demux)
{
  gst_riff_avih *avih;
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  guint8 *avihdata;
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  GstByteStream  *bs = avi_demux->bs;
  guint32 got_bytes;

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  got_bytes = gst_bytestream_peek_bytes (bs, &avihdata, sizeof (gst_riff_avih));
  avih = (gst_riff_avih *) avihdata;
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  if (got_bytes == sizeof (gst_riff_avih)) {
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    avi_demux->avih.us_frame 	= GUINT32_FROM_LE (avih->us_frame);
    avi_demux->avih.max_bps 	= GUINT32_FROM_LE (avih->max_bps);
    avi_demux->avih.pad_gran 	= GUINT32_FROM_LE (avih->pad_gran);
    avi_demux->avih.flags 	= GUINT32_FROM_LE (avih->flags);
    avi_demux->avih.tot_frames 	= GUINT32_FROM_LE (avih->tot_frames);
    avi_demux->avih.init_frames = GUINT32_FROM_LE (avih->init_frames);
    avi_demux->avih.streams 	= GUINT32_FROM_LE (avih->streams);
    avi_demux->avih.bufsize 	= GUINT32_FROM_LE (avih->bufsize);
    avi_demux->avih.width 	= GUINT32_FROM_LE (avih->width);
    avi_demux->avih.height 	= GUINT32_FROM_LE (avih->height);
    avi_demux->avih.scale 	= GUINT32_FROM_LE (avih->scale);
    avi_demux->avih.rate 	= GUINT32_FROM_LE (avih->rate);
    avi_demux->avih.start 	= GUINT32_FROM_LE (avih->start);
    avi_demux->avih.length 	= GUINT32_FROM_LE (avih->length);

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    GST_INFO ( "gst_avi_demux: avih tag found");
    GST_INFO ( "gst_avi_demux:  us_frame    %d", avi_demux->avih.us_frame);
    GST_INFO ( "gst_avi_demux:  max_bps     %d", avi_demux->avih.max_bps);
    GST_INFO ( "gst_avi_demux:  pad_gran    %d", avi_demux->avih.pad_gran);
    GST_INFO ( "gst_avi_demux:  flags       0x%08x", avi_demux->avih.flags);
    GST_INFO ( "gst_avi_demux:  tot_frames  %d", avi_demux->avih.tot_frames);
    GST_INFO ( "gst_avi_demux:  init_frames %d", avi_demux->avih.init_frames);
    GST_INFO ( "gst_avi_demux:  streams     %d", avi_demux->avih.streams);
    GST_INFO ( "gst_avi_demux:  bufsize     %d", avi_demux->avih.bufsize);
    GST_INFO ( "gst_avi_demux:  width       %d", avi_demux->avih.width);
    GST_INFO ( "gst_avi_demux:  height      %d", avi_demux->avih.height);
    GST_INFO ( "gst_avi_demux:  scale       %d", avi_demux->avih.scale);
    GST_INFO ( "gst_avi_demux:  rate        %d", avi_demux->avih.rate);
    GST_INFO ( "gst_avi_demux:  start       %d", avi_demux->avih.start);
    GST_INFO ( "gst_avi_demux:  length      %d", avi_demux->avih.length);
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    return TRUE;
  }
  return FALSE;
}

static gboolean 
gst_avi_demux_strh (GstAviDemux *avi_demux)
{
  gst_riff_strh *strh;
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  guint8 *strhdata;
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  GstByteStream  *bs = avi_demux->bs;
  guint32 got_bytes;

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  got_bytes = gst_bytestream_peek_bytes (bs, &strhdata, sizeof (gst_riff_strh));
  strh = (gst_riff_strh *) strhdata;
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  if (got_bytes == sizeof (gst_riff_strh)) {
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    avi_stream_context *target;

    avi_demux->fcc_type = GUINT32_FROM_LE (strh->type);

    target = &avi_demux->stream[avi_demux->num_streams];

    target->num = avi_demux->num_streams;

    target->strh.type 		= avi_demux->fcc_type;
    target->strh.fcc_handler 	= GUINT32_FROM_LE (strh->fcc_handler);
    target->strh.flags		= GUINT32_FROM_LE (strh->flags);
    target->strh.priority	= GUINT32_FROM_LE (strh->priority);
    target->strh.init_frames	= GUINT32_FROM_LE (strh->init_frames);
    target->strh.scale		= GUINT32_FROM_LE (strh->scale);
    target->strh.rate		= GUINT32_FROM_LE (strh->rate);
    target->strh.start		= GUINT32_FROM_LE (strh->start);
    target->strh.length		= GUINT32_FROM_LE (strh->length);
    target->strh.bufsize	= GUINT32_FROM_LE (strh->bufsize);
    target->strh.quality	= GUINT32_FROM_LE (strh->quality);
    target->strh.samplesize	= GUINT32_FROM_LE (strh->samplesize);

    if (!target->strh.scale)
      target->strh.scale = 1; /* avoid division by zero */
    if (!target->strh.rate)
      target->strh.rate = 1; /* avoid division by zero */

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    GST_INFO ( "gst_avi_demux: strh tag found");
    GST_INFO ( "gst_avi_demux:  type        0x%08x (%s)", 
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  		  target->strh.type, gst_riff_id_to_fourcc (strh->type));
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    GST_INFO ( "gst_avi_demux:  fcc_handler 0x%08x (%s)", 
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		  target->strh.fcc_handler, gst_riff_id_to_fourcc (strh->fcc_handler));
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    GST_INFO ( "gst_avi_demux:  flags       0x%08x", strh->flags);
    GST_INFO ( "gst_avi_demux:  priority    %d", target->strh.priority);
    GST_INFO ( "gst_avi_demux:  init_frames %d", target->strh.init_frames);
    GST_INFO ( "gst_avi_demux:  scale       %d", target->strh.scale);
    GST_INFO ( "gst_avi_demux:  rate        %d", target->strh.rate);
    GST_INFO ( "gst_avi_demux:  start       %d", target->strh.start);
    GST_INFO ( "gst_avi_demux:  length      %d", target->strh.length);
    GST_INFO ( "gst_avi_demux:  bufsize     %d", target->strh.bufsize);
    GST_INFO ( "gst_avi_demux:  quality     %d", target->strh.quality);
    GST_INFO ( "gst_avi_demux:  samplesize  %d", target->strh.samplesize);
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    target->delay = 0LL;
    target->total_bytes = 0LL;
    target->total_frames = 0;
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    target->end_pos = -1;
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    target->current_frame = 0;
    target->current_byte = 0;
    target->need_flush = FALSE;
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    target->skip = 0;
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    avi_demux->avih.bufsize = MAX (avi_demux->avih.bufsize, target->strh.bufsize);

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    return TRUE;
  }
  return FALSE;
}

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static void
gst_avi_demux_dmlh (GstAviDemux *avi_demux)
{
  gst_riff_dmlh *dmlh;
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  guint8 *dmlhdata;
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  GstByteStream  *bs = avi_demux->bs;
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  guint32 got_bytes;

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  got_bytes = gst_bytestream_peek_bytes (bs, &dmlhdata, sizeof (gst_riff_dmlh));
  dmlh = (gst_riff_dmlh *) dmlhdata;
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}

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static void
gst_avi_demux_strn (GstAviDemux *avi_demux, gint len)
{
  gchar *name;
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  guint8 *namedata;
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  GstByteStream  *bs = avi_demux->bs;
  guint32 got_bytes;

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  got_bytes = gst_bytestream_peek_bytes (bs, &namedata, len);
  name = (gchar *) namedata;
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  if (got_bytes != len)
    return;

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  GST_DEBUG ("Stream name: \"%s\"", name);
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}

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static void
gst_avi_demux_metadata (GstAviDemux *avi_demux, gint len)
{
  guint32 got_bytes;
  GstByteStream  *bs = avi_demux->bs;
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  gst_riff_chunk *temp_chunk, chunk;
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  guint8 *tempdata;
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  gchar *name, *type;
  GstProps *props;
  GstPropsEntry *entry;

  props = gst_props_empty_new ();

  while (len > 0) {
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    got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, sizeof (gst_riff_chunk));
    temp_chunk = (gst_riff_chunk *) tempdata;
    
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    /* fixup for our big endian friends */
    chunk.id = GUINT32_FROM_LE (temp_chunk->id);
    chunk.size = GUINT32_FROM_LE (temp_chunk->size);

    gst_bytestream_flush (bs, sizeof (gst_riff_chunk));
    if (got_bytes != sizeof (gst_riff_chunk))
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      return;
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    len -= sizeof (gst_riff_chunk);
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    /* don't care about empty entries - move on */
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    if (chunk.size == 0)
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      continue;

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    got_bytes = gst_bytestream_peek_bytes (bs, &tempdata, chunk.size);
    name = (gchar *) tempdata;
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    gst_bytestream_flush (bs, (chunk.size + 1) & ~1);
    if (got_bytes != chunk.size)
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      return;
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    len -= ((chunk.size + 1) & ~1);
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    /* we now have an info string in 'name' of type 'chunk.id' - find 'type' */
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    switch (chunk.id) {
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      case GST_RIFF_INFO_IARL:
        type = "Location";
        break;
      case GST_RIFF_INFO_IART:
        type = "Artist";
        break;
      case GST_RIFF_INFO_ICMS:
        type = "Commissioner";
        break;
      case GST_RIFF_INFO_ICMT:
        type = "Comment";
        break;
      case GST_RIFF_INFO_ICOP:
        type = "Copyright";
        break;
      case GST_RIFF_INFO_ICRD:
        type = "Creation Date";
        break;
      case GST_RIFF_INFO_ICRP:
        type = "Cropped";
        break;
      case GST_RIFF_INFO_IDIM:
        type = "Dimensions";
        break;
      case GST_RIFF_INFO_IDPI:
        type = "Dots per Inch";
        break;
      case GST_RIFF_INFO_IENG:
        type = "Engineer";
        break;
      case GST_RIFF_INFO_IGNR:
        type = "Genre";
        break;
      case GST_RIFF_INFO_IKEY:
        type = "Keywords";
        break;
      case GST_RIFF_INFO_ILGT:
        type = "Lightness";
        break;
      case GST_RIFF_INFO_IMED:
        type = "Medium";
        break;
      case GST_RIFF_INFO_INAM:
        type = "Title"; /* "Name" */
        break;
      case GST_RIFF_INFO_IPLT:
        type = "Palette";
        break;
      case GST_RIFF_INFO_IPRD:
        type = "Product";
        break;
      case GST_RIFF_INFO_ISBJ:
        type = "Subject";
        break;
      case GST_RIFF_INFO_ISFT:
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        type = "Encoder"; /* "Software" */
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        break;
      case GST_RIFF_INFO_ISHP:
        type = "Sharpness";
        break;
      case GST_RIFF_INFO_ISRC:
        type = "Source";
        break;
      case GST_RIFF_INFO_ISRF:
        type = "Source Form";
        break;
      case GST_RIFF_INFO_ITCH:
        type = "Technician";
        break;
      default:
	type = NULL;
	break;
    }

    if (type) {
      /* create props entry */
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      entry = gst_props_entry_new (type, GST_PROPS_STRING (name));
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      gst_props_add_entry (props, entry);
    }
  }

  gst_props_debug(props);

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  gst_caps_replace_sink (&avi_demux->metadata,
		         gst_caps_new("avi_metadata",
                                      "application/x-gst-metadata",
                                        props));
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  g_object_notify(G_OBJECT(avi_demux), "metadata");
}

static void
gst_avi_demux_streaminfo (GstAviDemux *avi_demux)
{
  GstProps *props;

  props = gst_props_empty_new ();

  /* compression formats are added later - a bit hacky */

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  gst_caps_replace_sink (&avi_demux->streaminfo,
		  	 gst_caps_new("avi_streaminfo",
                                      "application/x-gst-streaminfo",
                                      props));
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  /*g_object_notify(G_OBJECT(avi_demux), "streaminfo");*/
}

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/* video/audio pad/caps stuff */

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#ifdef G_HAVE_ISO_VARARGS

#define GST_AVI_VID_CAPS_NEW(name, mimetype, ...)		\
	(strf != NULL) ?					\
	GST_CAPS_NEW (name,					\
		      mimetype,					\
		      "width",  GST_PROPS_INT (width),		\
		      "height", GST_PROPS_INT (height),		\
		      "framerate", GST_PROPS_FLOAT (framerate), \
		      __VA_ARGS__)				\
	:							\
	GST_CAPS_NEW (name,					\
		      mimetype,					\
		      "width",  GST_PROPS_INT_RANGE (16, 4096),	\
		      "height", GST_PROPS_INT_RANGE (16, 4096),	\
		      "framerate", GST_PROPS_FLOAT_RANGE (0., G_MAXFLOAT), \
		      __VA_ARGS__)

#elif defined(G_HAVE_GNUC_VARARGS)

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#define GST_AVI_VID_CAPS_NEW(name, mimetype, props...)		\
	(strf != NULL) ?					\
	GST_CAPS_NEW (name,					\
		      mimetype,					\
		      "width",  GST_PROPS_INT (width),		\
		      "height", GST_PROPS_INT (height),		\
		      "framerate", GST_PROPS_FLOAT (framerate), \
		      ##props)					\
	:							\
	GST_CAPS_NEW (name,					\
		      mimetype,					\
		      "width",  GST_PROPS_INT_RANGE (16, 4096),	\
		      "height", GST_PROPS_INT_RANGE (16, 4096),	\
		      "framerate", GST_PROPS_FLOAT_RANGE (0., G_MAXFLOAT), \
		      ##props)
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#endif
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static GstCaps *
gst_avi_demux_video_caps (guint32 codec_fcc,
			  gst_riff_strh *strh,
			  gst_riff_strf_vids *strf,
			  GstAviDemux *avi_demux)
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{
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  GstCaps *caps = NULL;
  gchar *codecname = NULL;
  gint width = -1, height = -1;
  gdouble framerate = 0.;

  if (strf != NULL) {
    width = GUINT32_FROM_LE (strf->width);
    height = GUINT32_FROM_LE (strf->height);
  }
  if (strh != NULL) {
    framerate = 1. * GUINT32_FROM_LE (strh->rate) /
		GUINT32_FROM_LE (strh->scale); /* fps */
  }
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  switch (codec_fcc) {
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    case GST_MAKE_FOURCC('I','4','2','0'):
    case GST_MAKE_FOURCC('Y','U','Y','2'):
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      caps = GST_AVI_VID_CAPS_NEW (
                  "avidemux_video_src_raw",
                  "video/x-raw-yuv",
                    "format",  GST_PROPS_FOURCC (codec_fcc)
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                );
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      codecname = g_strdup_printf("Raw Video (" GST_FOURCC_FORMAT ")",
                                  GST_FOURCC_ARGS(codec_fcc));
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      break;
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    case GST_MAKE_FOURCC('M','J','P','G'): /* YUY2 MJPEG */
    case GST_MAKE_FOURCC('J','P','E','G'): /* generic (mostly RGB) MJPEG */
    case GST_MAKE_FOURCC('P','I','X','L'): /* Miro/Pinnacle fourccs */
    case GST_MAKE_FOURCC('V','I','X','L'): /* Miro/Pinnacle fourccs */
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      caps = GST_AVI_VID_CAPS_NEW (
                  "avidemux_video_src_jpeg",
                  "video/x-jpeg",
                    NULL
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                );
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      codecname = g_strdup_printf("Motion-JPEG (" GST_FOURCC_FORMAT ")",
                                  GST_FOURCC_ARGS(codec_fcc));
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      break;
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    case GST_MAKE_FOURCC('H','F','Y','U'):
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      caps = GST_AVI_VID_CAPS_NEW (
                  "avidemux_video_src_hfyu",
                  "video/x-huffyuv",
                    NULL
                );
      codecname = g_strdup_printf("HuffYUV (" GST_FOURCC_FORMAT ")",
                                  GST_FOURCC_ARGS(codec_fcc));
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      break;
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    case GST_MAKE_FOURCC('M','P','E','G'):
    case GST_MAKE_FOURCC('M','P','G','I'):
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      caps = GST_AVI_VID_CAPS_NEW (
                  "avidemux_video_src_mpeg",
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                  "video/mpeg",
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                    "systemstream", GST_PROPS_BOOLEAN (FALSE),
		    "mpegversion", GST_PROPS_BOOLEAN (1)
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                );
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      codecname = g_strdup_printf("MPEG-1 (" GST_FOURCC_FORMAT ")",
                                  GST_FOURCC_ARGS(codec_fcc));
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      break;
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    case GST_MAKE_FOURCC('H','2','6','3'):
    case GST_MAKE_FOURCC('i','2','6','3'):
    case GST_MAKE_FOURCC('L','2','6','3'):
    case GST_MAKE_FOURCC('M','2','6','3'):
    case GST_MAKE_FOURCC('V','D','O','W'):
    case GST_MAKE_FOURCC('V','I','V','O'):
    case GST_MAKE_FOURCC('x','2','6','3'):
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      caps = GST_AVI_VID_CAPS_NEW (
                  "avidemux_video_src_263",
                  "video/x-h263",
                    NULL
                );
      codecname = g_strdup_printf("H263-compatible (" GST_FOURCC_FORMAT ")",
                                  GST_FOURCC_ARGS(codec_fcc));
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      break;
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    case GST_MAKE_FOURCC('D','I','V','3'):
    case GST_MAKE_FOURCC('D','I','V','4'):
    case GST_MAKE_FOURCC('D','I','V','5'):
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      caps = GST_AVI_VID_CAPS_NEW (
                  "avidemux_video_src_divx3",
                  "video/x-divx",
		    "divxversion", GST_PROPS_INT(3)
                );
      codecname = g_strdup_printf("DivX-3.x (" GST_FOURCC_FORMAT ")",
                                  GST_FOURCC_ARGS(codec_fcc));
      break;

    case GST_MAKE_FOURCC('d','i','v','x'):
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    case GST_MAKE_FOURCC('D','I','V','X'):
    case GST_MAKE_FOURCC('D','X','5','0'):
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      caps = GST_AVI_VID_CAPS_NEW (
                  "avidemux_video_src_divx5",
                  "video/x-divx",
		    "divxversion", GST_PROPS_INT(5)
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                );
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      codecname = g_strdup_printf("DivX 4.x/5.x (" GST_FOURCC_FORMAT ")",
                                  GST_FOURCC_ARGS(codec_fcc));
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      break;
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    case GST_MAKE_FOURCC('X','V','I','D'):
    case GST_MAKE_FOURCC('x','v','i','d'):
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      caps = GST_AVI_VID_CAPS_NEW (
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                  "avidemux_video_src",
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                  "video/x-xvid",
                    NULL
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                );
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      codecname = g_strdup_printf("XviD (" GST_FOURCC_FORMAT ")",
                                  GST_FOURCC_ARGS(codec_fcc));
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      break;
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    case GST_MAKE_FOURCC('M','P','G','4'):
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      caps = GST_AVI_VID_CAPS_NEW (
                  "avidemux_video_src",
                  "video/x-msmpeg",
		    "msmpegversion", GST_PROPS_INT (41)
                );
      codecname = g_strdup_printf("MS MPEG-4.1 (" GST_FOURCC_FORMAT ")",
                                  GST_FOURCC_ARGS(codec_fcc));
      break;

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    case GST_MAKE_FOURCC('M','P','4','2'):
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      caps = GST_AVI_VID_CAPS_NEW (
                  "avidemux_video_src",
                  "video/x-msmpeg",
		    "msmpegversion", GST_PROPS_INT (42)
                );
      codecname = g_strdup_printf("MS MPEG-4.2 (" GST_FOURCC_FORMAT ")",
                                  GST_FOURCC_ARGS(codec_fcc));
      break;

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    case GST_MAKE_FOURCC('M','P','4','3'):
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      caps = GST_AVI_VID_CAPS_NEW (
                  "avidemux_video_src",
                  "video/x-msmpeg",
		    "msmpegversion", GST_PROPS_INT (43)
                );
      codecname = g_strdup_printf("MS MPEG-4.3 (" GST_FOURCC_FORMAT ")",
                                  GST_FOURCC_ARGS(codec_fcc));
      break;

    case GST_MAKE_FOURCC('3','I','V','1'):
    case GST_MAKE_FOURCC('3','I','V','2'):
      caps = GST_AVI_VID_CAPS_NEW (
		  "avidemux_video_src_3ivx",
		  "video/x-3ivx",
		    NULL
		);
      codecname = g_strdup_printf("3ivX (" GST_FOURCC_FORMAT ")",
				  GST_FOURCC_ARGS(codec_fcc));
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      break;
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    case GST_MAKE_FOURCC('D','V','S','D'):
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    case GST_MAKE_FOURCC('d','v','s','d'):
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      caps = GST_AVI_VID_CAPS_NEW (
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                  "avidemux_video_src",
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                  "video/x-dv",
                    "systemstream", GST_PROPS_BOOLEAN (FALSE)
                );
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      codecname = g_strdup_printf("Digital Video type 2 (" GST_FOURCC_FORMAT ")",
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                                  GST_FOURCC_ARGS(codec_fcc));
      break;

    case GST_MAKE_FOURCC('W','M','V','1'):
      caps = GST_AVI_VID_CAPS_NEW (
                  "avidemux_video_src_wmv1",
                  "video/x-wmv",
                    "wmvversion", GST_PROPS_INT (1)
                );
      codecname = g_strdup_printf("Windows Media Format 1 ("
				  GST_FOURCC_FORMAT ")",
				  GST_FOURCC_ARGS(codec_fcc));
      break;

    case GST_MAKE_FOURCC('W','M','V','2'):
      caps = GST_AVI_VID_CAPS_NEW (
                  "avidemux_video_src_wmv2",
                  "video/x-wmv",
                    "wmvversion", GST_PROPS_INT (2)
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                );
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      codecname = g_strdup_printf("Windows Media Format 2 ("
				  GST_FOURCC_FORMAT ")",
				  GST_FOURCC_ARGS(codec_fcc));
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      break;
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    default:
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      g_warning ("avidemux: unkown video format " GST_FOURCC_FORMAT,
		 GST_FOURCC_ARGS(codec_fcc));
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      break;
  }

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  /* set video codec info on streaminfo caps */
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  if (avi_demux != NULL && codecname != NULL) {
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    GstPropsEntry *entry;
    entry = gst_props_entry_new("videocodec",
				GST_PROPS_STRING(codecname));
    gst_props_add_entry(avi_demux->streaminfo->properties, entry);
  }
  if (codecname != NULL) {
    g_free(codecname);
  }

  return caps;
}

static void 
gst_avi_demux_strf_vids (GstAviDemux *avi_demux)
{
  gst_riff_strf_vids *strf;
  gst_riff_strh *strh;
  guint8 *strfdata;
  GstPad *srcpad;
  GstCaps *caps = NULL;
  avi_stream_context *stream;
  GstByteStream  *bs = avi_demux->bs;
  guint32 got_bytes;
  gchar *padname;

  got_bytes = gst_bytestream_peek_bytes (bs, &strfdata, sizeof (gst_riff_strf_vids));
  strf = (gst_riff_strf_vids *) strfdata;
  if (got_bytes != sizeof (gst_riff_strf_vids))
    return;

  padname = g_strdup_printf ("video_%02d", avi_demux->num_v_streams);
  srcpad =  gst_pad_new_from_template (videosrctempl, padname);
  g_free (padname);
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  /* let's try some gstreamer-like mime-type caps */
  strh = &avi_demux->stream[avi_demux->num_streams].strh;
  caps = gst_avi_demux_video_caps (GUINT32_FROM_LE(strf->compression),
				   strh, strf, avi_demux);

  if (caps != NULL) {
    gst_pad_try_set_caps (srcpad, caps);
  }
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  gst_pad_set_formats_function (srcpad, gst_avi_demux_get_src_formats);
  gst_pad_set_event_mask_function (srcpad, gst_avi_demux_get_event_mask);
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  gst_pad_set_event_function (srcpad, gst_avi_demux_handle_src_event);
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  gst_pad_set_query_type_function (srcpad, gst_avi_demux_get_src_query_types);
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  gst_pad_set_query_function (srcpad, gst_avi_demux_handle_src_query);
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  gst_pad_set_convert_function (srcpad, gst_avi_demux_src_convert);
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  stream = &avi_demux->stream[avi_demux->num_streams];
  stream->pad = srcpad;
  gst_pad_set_element_private (srcpad, stream);
  avi_demux->num_streams++;
  avi_demux->num_v_streams++;
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  gst_element_add_pad (GST_ELEMENT (avi_demux), srcpad);
}

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#ifdef G_HAVE_ISO_VARARGS

#define GST_AVI_AUD_CAPS_NEW(name, mimetype, ...)			\
	(strf != NULL) ?						\
	GST_CAPS_NEW (name,						\
		      mimetype,						\
		      "rate",     GST_PROPS_INT (rate),			\
		      "channels", GST_PROPS_INT (channels),		\
		      __VA_ARGS__)					\
	:								\
	GST_CAPS_NEW (name,						\
		      mimetype,						\
		      "rate",     GST_PROPS_INT_RANGE (8000, 96000),	\
		      "channels", GST_PROPS_INT_RANGE (1, 2),		\
		      __VA_ARGS__)


#elif defined(G_HAVE_GNUC_VARARGS)

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#define GST_AVI_AUD_CAPS_NEW(name, mimetype, props...)			\
	(strf != NULL) ?						\
	GST_CAPS_NEW (name,						\
		      mimetype,						\
		      "rate",     GST_PROPS_INT (rate),			\
		      "channels", GST_PROPS_INT (channels),		\
		      ##props)						\
	:								\
	GST_CAPS_NEW (name,						\
		      mimetype,						\
		      "rate",     GST_PROPS_INT_RANGE (8000, 96000),	\
		      "channels", GST_PROPS_INT_RANGE (1, 2),		\
		      ##props)
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#endif
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static GstCaps *
gst_avi_demux_audio_caps (guint16 codec_id,
			  gst_riff_strf_auds *strf,
			  GstAviDemux *avi_demux)
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{
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  GstCaps *caps = NULL;
  gchar *codecname = NULL;
  gint rate = -1, channels = -1;
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  if (strf != NULL) {
    rate = GUINT32_FROM_LE (strf->rate);
    channels = GUINT16_FROM_LE (strf->channels);
  }
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  switch (codec_id) {
    case GST_RIFF_WAVE_FORMAT_MPEGL3: /* mp3 */
      caps = GST_AVI_AUD_CAPS_NEW ("avi_demux_audio_src_mp3",
				   "audio/mpeg",
				     "layer", GST_PROPS_INT (3));
      codecname = g_strdup_printf("MPEG-1 layer 3 audio (0x%04x)",
                                  codec_id);
      break;
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    case GST_RIFF_WAVE_FORMAT_MPEGL12: /* mp1 or mp2 */
      caps = GST_AVI_AUD_CAPS_NEW ("avi_demux_audio_src_mp12",
				   "audio/mpeg",
				     "layer", GST_PROPS_INT (2));
      codecname = g_strdup_printf("MPEG-1 layer 1/2 audio (0x%04x)",
                                  codec_id);
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      break;
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    case GST_RIFF_WAVE_FORMAT_PCM: /* PCM/wav */ {
      GstPropsEntry *width = NULL, *depth = NULL, *signedness = NULL;

      if (strf != NULL) {
        gint ba = GUINT16_FROM_LE (strf->blockalign);
        gint ch = GUINT16_FROM_LE (strf->channels);
        gint ws = GUINT16_FROM_LE (strf->size);

        width = gst_props_entry_new ("width",
				     GST_PROPS_INT (ba * 8 / ch));
        depth = gst_props_entry_new ("depth",
				     GST_PROPS_INT (ws));
        signedness = gst_props_entry_new ("signed",
					  GST_PROPS_BOOLEAN (ws != 8));
      } else {
        signedness = gst_props_entry_new ("signed",
					  GST_PROPS_LIST (
					    GST_PROPS_BOOLEAN (TRUE),
					    GST_PROPS_BOOLEAN (FALSE)));
        width = gst_props_entry_new ("width",
				     GST_PROPS_LIST (
				       GST_PROPS_INT (8),
				       GST_PROPS_INT (16)));
        depth = gst_props_entry_new ("depth",
				     GST_PROPS_LIST (
				       GST_PROPS_INT (8),
				       GST_PROPS_INT (16)));
      }

      caps = GST_AVI_AUD_CAPS_NEW ("avi_demux_audio_src_pcm",
				   "audio/x-raw-int",
				     "endianness",
				       GST_PROPS_INT (G_LITTLE_ENDIAN));
      gst_props_add_entry (caps->properties, width);
      gst_props_add_entry (caps->properties, depth);
      gst_props_add_entry (caps->properties, signedness);

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      codecname = g_strdup_printf("Raw PCM/WAV (0x%04x)",
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                                  codec_id);
    }
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      break;
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    case GST_RIFF_WAVE_FORMAT_MULAW:
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      if (strf != NULL && strf->size != 8) {
        g_warning ("invalid depth (%d) of mulaw audio, overwriting.",
		   strf->size);
      }
      caps = GST_AVI_AUD_CAPS_NEW ("avidemux_audio_src",
				   "audio/x-mulaw",
				     NULL);
      codecname = g_strdup_printf("A-law encoded (0x%04x)",
                                  codec_id);
      break;

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    case GST_RIFF_WAVE_FORMAT_ALAW:
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      if (strf != NULL && strf->size != 8) {
        g_warning ("invalid depth (%d) of alaw audio, overwriting.",
		   strf->size);
      }
      caps = GST_AVI_AUD_CAPS_NEW ("avidemux_audio_src",
				   "audio/x-alaw",
				     NULL);
      codecname = g_strdup_printf("A-law encoded (0x%04x)",
                                  codec_id);
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      break;
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    case GST_RIFF_WAVE_FORMAT_VORBIS1: /* ogg/vorbis mode 1 */
    case GST_RIFF_WAVE_FORMAT_VORBIS2: /* ogg/vorbis mode 2 */
    case GST_RIFF_WAVE_FORMAT_VORBIS3: /* ogg/vorbis mode 3 */
    case GST_RIFF_WAVE_FORMAT_VORBIS1PLUS: /* ogg/vorbis mode 1+ */
    case GST_RIFF_WAVE_FORMAT_VORBIS2PLUS: /* ogg/vorbis mode 2+ */
    case GST_RIFF_WAVE_FORMAT_VORBIS3PLUS: /* ogg/vorbis mode 3+ */
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      caps = GST_AVI_AUD_CAPS_NEW ("asf_demux_audio_src_vorbis",
				   "audio/x-vorbis",
				     NULL);
      codecname = g_strdup_printf("Vorbis (0x%04x)",
                                  codec_id);
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      break;
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    case GST_RIFF_WAVE_FORMAT_A52:
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      caps = GST_AVI_AUD_CAPS_NEW ("asf_demux_audio_src_ac3",
				   "audio/x-ac3",
				     NULL);
      codecname = g_strdup_printf("AC-3 (0x%04x)",
                                  codec_id);
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      break;
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    default:
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      g_warning ("avidemux: unkown audio format 0x%04x",
		 codec_id);
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      break;
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  }

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  if (avi_demux != NULL && codecname != NULL) {
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    /* set audio codec in streaminfo */
    GstPropsEntry *entry;
    entry = gst_props_entry_new("audiocodec",
				GST_PROPS_STRING(codecname));
    gst_props_add_entry(avi_demux->streaminfo->properties, entry);
  }
  if (codecname != NULL) {
    g_free (codecname);
  }

  return caps;
}
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static void 
gst_avi_demux_strf_auds (GstAviDemux *avi_demux)
{
  gst_riff_strf_auds *strf;
  guint8 *strfdata;
  GstPad *srcpad;
  GstCaps *caps = NULL;
  avi_stream_context *stream;
  GstByteStream  *bs = avi_demux->bs;
  guint32 got_bytes;
  gchar *padname;

  got_bytes = gst_bytestream_peek_bytes (bs, &strfdata, sizeof (gst_riff_strf_auds));
  strf = (gst_riff_strf_auds *) strfdata;
  if (got_bytes != sizeof (gst_riff_strf_auds))
    return;
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  GST_INFO ( "gst_avi_demux: strf tag found in context auds");
  GST_INFO ( "gst_avi_demux:  format      %d", GUINT16_FROM_LE (strf->format));
  GST_INFO ( "gst_avi_demux:  channels    %d", GUINT16_FROM_LE (strf->channels));
  GST_INFO ( "gst_avi_demux:  rate        %d", GUINT32_FROM_LE (strf->rate));
  GST_INFO ( "gst_avi_demux:  av_bps      %d", GUINT32_FROM_LE (strf->av_bps));
  GST_INFO ( "gst_avi_demux:  blockalign  %d", GUINT16_FROM_LE (strf->blockalign));
  GST_INFO ( "gst_avi_demux:  size        %d", GUINT16_FROM_LE (strf->size));

  padname = g_strdup_printf ("audio_%02d", 
			     avi_demux->num_a_streams);
  srcpad =  gst_pad_new_from_template (audiosrctempl, padname);
  g_free (padname);

  caps = gst_avi_demux_audio_caps (GUINT16_FROM_LE (strf->format),
				   strf, avi_demux);

  if (caps != NULL) {
    gst_pad_try_set_caps(srcpad, caps);
  }
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  gst_pad_set_formats_function (srcpad, gst_avi_demux_get_src_formats);
  gst_pad_set_event_mask_function (srcpad, gst_avi_demux_get_event_mask);
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  gst_pad_set_event_function (srcpad, gst_avi_demux_handle_src_event);
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  gst_pad_set_query_type_function (srcpad, gst_avi_demux_get_src_query_types);
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  gst_pad_set_query_function (srcpad, gst_avi_demux_handle_src_query);
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  gst_pad_set_convert_function (srcpad, gst_avi_demux_src_convert);
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  stream = &avi_demux->stream[avi_demux->num_streams];
  stream->pad = srcpad;
  gst_pad_set_element_private (srcpad, stream);
  avi_demux->num_streams++;
  avi_demux->num_a_streams++;
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  gst_element_add_pad (GST_ELEMENT (avi_demux), srcpad);
}

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static GstCaps *
gst_avi_demux_iavs_caps (void)
{
  return GST_CAPS_NEW ("avi_type_dv", 
                       "video/x-dv", 
                         "systemstream", GST_PROPS_BOOLEAN (TRUE));
}

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static void 
gst_avi_demux_strf_iavs (GstAviDemux *avi_demux)
{
  gst_riff_strf_iavs *strf;
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  guint8 *strfdata;
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  GstPad *srcpad;
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  GstCaps *caps = NULL;
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  avi_stream_context *stream;
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  GstByteStream  *bs = avi_demux->bs;
  guint32 got_bytes;
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  gchar *padname;
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  GstPropsEntry *entry;
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  got_bytes = gst_bytestream_peek_bytes (bs, &strfdata, sizeof (gst_riff_strf_iavs));
  strf = (gst_riff_strf_iavs *) strfdata;
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  if (got_bytes != sizeof (gst_riff_strf_iavs))
    return;
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  GST_INFO ( "gst_avi_demux: strf tag found in context iavs");
  GST_INFO ( "gst_avi_demux:  DVAAuxSrc   %08x", GUINT32_FROM_LE (strf->DVAAuxSrc));
  GST_INFO ( "gst_avi_demux:  DVAAuxCtl   %08x", GUINT32_FROM_LE (strf->DVAAuxCtl));
  GST_INFO ( "gst_avi_demux:  DVAAuxSrc1  %08x", GUINT32_FROM_LE (strf->DVAAuxSrc1));
  GST_INFO ( "gst_avi_demux:  DVAAuxCtl1  %08x", GUINT32_FROM_LE (strf->DVAAuxCtl1));
  GST_INFO ( "gst_avi_demux:  DVVAuxSrc   %08x", GUINT32_FROM_LE (strf->DVVAuxSrc));
  GST_INFO ( "gst_avi_demux:  DVVAuxCtl   %08x", GUINT32_FROM_LE (strf->DVVAuxCtl));
  GST_INFO ( "gst_avi_demux:  DVReserved1 %08x", GUINT32_FROM_LE (strf->DVReserved1));
  GST_INFO ( "gst_avi_demux:  DVReserved2 %08x", GUINT32_FROM_LE (strf->DVReserved2));
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  padname = g_strdup_printf ("video_%02d", 
			     avi_demux->num_v_streams);
  srcpad =  gst_pad_new_from_template (videosrctempl, padname);
  g_free (padname);

  caps = gst_avi_demux_iavs_caps ();
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  entry = gst_props_entry_new("videocodec",
                              GST_PROPS_STRING("Digital Video type 1"));
  gst_props_add_entry(avi_demux->streaminfo->properties, entry);
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  if (caps != NULL) {
    gst_pad_try_set_caps(srcpad, caps);
  }
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  gst_pad_set_formats_function (srcpad, gst_avi_demux_get_src_formats);
  gst_pad_set_event_mask_function (srcpad, gst_avi_demux_get_event_mask);
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  gst_pad_set_event_function (srcpad, gst_avi_demux_handle_src_event);
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  gst_pad_set_query_type_function (srcpad, gst_avi_demux_get_src_query_types);
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  gst_pad_set_query_function (srcpad, gst_avi_demux_handle_src_query);
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  gst_pad_set_convert_function (srcpad, gst_avi_demux_src_convert);
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  stream = &avi_demux->stream[avi_demux->num_streams];
  stream->pad = srcpad;
  gst_pad_set_element_private (srcpad, stream);
  avi_demux->num_streams++;
  avi_demux->num_v_streams++;
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  gst_element_add_pad (GST_ELEMENT (avi_demux), srcpad);
}

static void
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gst_avi_debug_entry (const gchar *prefix, gst_avi_index_entry *entry)
{
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  GST_DEBUG ("%s: %05d %d %08llx %05d %14" G_GINT64_FORMAT " %08x %08x (%d) %08x", 
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		  prefix, entry->index_nr, entry->stream_nr, 
		  (unsigned long long)entry->bytes_before, 
		  entry->frames_before, entry->ts, entry->flags, entry->offset, 
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		  entry->offset, entry->size);
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}

static void
gst_avi_demux_parse_index (GstAviDemux *avi_demux,
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		          gulong filepos, gulong offset)
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{
  GstBuffer *buf;
  gulong index_size;
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  guint32 got_bytes;
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  gint i;
  gst_riff_index_entry *entry;
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  guint32 id;
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  if (!gst_bytestream_seek (avi_demux->bs, filepos + offset, GST_SEEK_METHOD_SET)) {
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    GST_INFO ( "avidemux: could not seek to index");
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    return;
  }
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  do {
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    guint32 remaining;
    GstEvent *event;
  
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    got_bytes = gst_bytestream_read (avi_demux->bs, &buf, 8);
    if (got_bytes == 8)
      break;

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    gst_bytestream_get_status (avi_demux->bs, &remaining, &event);
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    gst_event_unref (event);
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  } while (TRUE);
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  if (GST_BUFFER_OFFSET (buf) != filepos + offset || GST_BUFFER_SIZE (buf) != 8) {
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    GST_INFO ( "avidemux: could not get index, got %" G_GINT64_FORMAT " %d, expected %ld", 
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		    GST_BUFFER_OFFSET (buf), GST_BUFFER_SIZE (buf), filepos + offset);
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    goto end;
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  }

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  id = GUINT32_FROM_LE (*(guint32 *)GST_BUFFER_DATA (buf));

  if (id != GST_RIFF_TAG_idx1) {
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    GST_INFO ( "avidemux: no index found");
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    goto end;
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  }

  index_size = GUINT32_FROM_LE(*(guint32 *)(GST_BUFFER_DATA (buf) + 4));
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  gst_buffer_unref (buf);
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  gst_bytestream_size_hint (avi_demux->bs, index_size);

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  got_bytes = gst_bytestream_read (avi_demux->bs, &buf, index_size);
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  if (got_bytes < index_size) {
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    GST_INFO ( "avidemux: error reading index");
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    goto end;
  }