gstreamer/gst/avi/gstavidecoder.c

/* GStreamer
 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
 *
 * 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.
 */


/*#define GST_DEBUG_ENABLED */
#include <string.h>

#include "gstavidecoder.h"



/* elementfactory information */
static GstElementDetails gst_avi_decoder_details = {
  ".avi decoder",
  "Decoder/Video",
  "Decodes a .avi file into audio and video",
  VERSION,
  "Erik Walthinsen <omega@cse.ogi.edu>\n"
  "Wim Taymans <wim.taymans@tvd.be>",
  "(C) 1999",
};

static GstCaps* avi_typefind (GstBuffer *buf, gpointer private);

/* typefactory for 'avi' */
static GstTypeDefinition avidefinition = {
  "avidecoder_video/avi",
  "video/avi",
  ".avi",
  avi_typefind,
};

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

enum {
  ARG_0,
  ARG_BITRATE,
  ARG_MEDIA_TIME,
  ARG_CURRENT_TIME,
  /* FILL ME */
};

GST_PADTEMPLATE_FACTORY (sink_templ,
  "sink",
  GST_PAD_SINK,
  GST_PAD_ALWAYS,
  GST_CAPS_NEW (
    "avidecoder_sink",
     "video/avi",
       "RIFF",  GST_PROPS_STRING ("AVI")
  )
)

GST_PADTEMPLATE_FACTORY (src_video_templ,
  "video_src",
  GST_PAD_SRC,
  GST_PAD_ALWAYS,
  GST_CAPS_NEW (
    "wincodec_src",
    "video/raw",
      "format",         GST_PROPS_LIST (
                          GST_PROPS_FOURCC (GST_MAKE_FOURCC ('Y','U','Y','2')),
                          GST_PROPS_FOURCC (GST_MAKE_FOURCC ('I','4','2','0')),
                          GST_PROPS_FOURCC (GST_MAKE_FOURCC ('R','G','B',' '))
                        ),
      "width",          GST_PROPS_INT_RANGE (16, 4096),
      "height",         GST_PROPS_INT_RANGE (16, 4096)
  )
)

GST_PADTEMPLATE_FACTORY (src_audio_templ,
  "audio_src",
  GST_PAD_SRC,
  GST_PAD_ALWAYS,
  GST_CAPS_NEW (
    "src_audio",
    "audio/raw",
      "format",           GST_PROPS_STRING ("int"),
      "law",              GST_PROPS_INT (0),
      "endianness",       GST_PROPS_INT (G_BYTE_ORDER),
      "signed",           GST_PROPS_LIST (
      			    GST_PROPS_BOOLEAN (TRUE),
      			    GST_PROPS_BOOLEAN (FALSE)
			  ),
      "width",            GST_PROPS_LIST (
	                    GST_PROPS_INT (8),
	                    GST_PROPS_INT (16)
			  ),
      "depth",            GST_PROPS_LIST (
	                    GST_PROPS_INT (8),
	                    GST_PROPS_INT (16)
			  ),
      "rate",             GST_PROPS_INT_RANGE (11025, 48000),
      "channels",         GST_PROPS_INT_RANGE (1, 2)
  )
)

static void 	gst_avi_decoder_class_init	(GstAviDecoderClass *klass);
static void 	gst_avi_decoder_init		(GstAviDecoder *avi_decoder);

static void     gst_avi_decoder_get_property    (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);



static GstElementClass *parent_class = NULL;
/*static guint gst_avi_decoder_signals[LAST_SIGNAL] = { 0 }; */

GType
gst_avi_decoder_get_type(void) 
{
  static GType avi_decoder_type = 0;

  if (!avi_decoder_type) {
    static const GTypeInfo avi_decoder_info = {
      sizeof(GstAviDecoderClass),      
      NULL,
      NULL,
      (GClassInitFunc)gst_avi_decoder_class_init,
      NULL,
      NULL,
      sizeof(GstAviDecoder),
      0,
      (GInstanceInitFunc)gst_avi_decoder_init,
    };
    avi_decoder_type = g_type_register_static(GST_TYPE_BIN, "GstAviDecoder", &avi_decoder_info, 0);
  }
  return avi_decoder_type;
}

static void
gst_avi_decoder_class_init (GstAviDecoderClass *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",
                     G_MINLONG, G_MAXLONG, 0, G_PARAM_READABLE)); /* CHECKME */
  g_object_class_install_property (G_OBJECT_CLASS(klass), ARG_MEDIA_TIME,
    g_param_spec_long ("media_time","media_time","media_time",
                     G_MINLONG, G_MAXLONG, 0, G_PARAM_READABLE)); /* CHECKME */
  g_object_class_install_property (G_OBJECT_CLASS(klass), ARG_CURRENT_TIME,
    g_param_spec_long ("current_time","current_time","current_time",
                     G_MINLONG, G_MAXLONG, 0, G_PARAM_READABLE)); /* CHECKME */

  parent_class = g_type_class_ref (GST_TYPE_BIN);
  
  gobject_class->get_property = gst_avi_decoder_get_property;
}

static void 
gst_avi_decoder_new_pad (GstElement *element, GstPad *pad, GstAviDecoder *avi_decoder) 
{
  GstCaps *caps;
  GstCaps *targetcaps = NULL;
  const gchar *format;
  gboolean type_found;
  GstElement *type;
  GstElement *new_element = NULL;
  gchar *padname = NULL;
  gchar *gpadname = NULL;
#define AVI_TYPE_VIDEO  1
#define AVI_TYPE_AUDIO  2
  gint media_type = 0;
  
  GST_DEBUG (0, "avidecoder: new pad for element \"%s\"", gst_element_get_name (element));

  caps = gst_pad_get_caps (pad);
  format = gst_caps_get_string (caps, "format");

  if (!strcmp (format, "strf_vids")) { 
    targetcaps = gst_padtemplate_get_caps (GST_PADTEMPLATE_GET (src_video_templ));
    media_type = AVI_TYPE_VIDEO;
    gpadname = g_strdup_printf ("video_%02d", avi_decoder->video_count++);
  }
  else if (!strcmp (format, "strf_auds")) {
    targetcaps = gst_padtemplate_get_caps (GST_PADTEMPLATE_GET (src_audio_templ));
    media_type = AVI_TYPE_AUDIO;
    gpadname = g_strdup_printf ("audio_%02d", avi_decoder->audio_count++);
  }
  else if (!strcmp (format, "strf_iavs")) {
    targetcaps = gst_padtemplate_get_caps (GST_PADTEMPLATE_GET (src_video_templ));
    media_type = AVI_TYPE_VIDEO;
    gpadname = g_strdup_printf ("video_%02d", avi_decoder->video_count++);
  }
  else {
    g_assert_not_reached ();
  }

  gst_element_set_state (GST_ELEMENT (avi_decoder), GST_STATE_PAUSED);

  type = gst_elementfactory_make ("avitypes", 
		  g_strdup_printf ("typeconvert%d", avi_decoder->count));

  /* brin the element to the READY state so it can do our caps negotiation */
  gst_element_set_state (type, GST_STATE_READY);

  gst_pad_connect (pad, gst_element_get_pad (type, "sink"));
  type_found = gst_util_get_bool_arg (G_OBJECT (type), "type_found");

  if (type_found) {

    gst_bin_add (GST_BIN (avi_decoder), type);
    
    pad = gst_element_get_pad (type, "src");
    caps = gst_pad_get_caps (pad);

    if (gst_caps_check_compatibility (caps, targetcaps)) {
      gst_element_add_ghost_pad (GST_ELEMENT (avi_decoder), 
	    gst_element_get_pad (type, "src"), gpadname);

      avi_decoder->count++;
      goto done;
    }
#ifndef GST_DISABLE_AUTOPLUG
    else {
      GstAutoplug *autoplug;
      autoplug = gst_autoplugfactory_make("static");

      new_element = gst_autoplug_to_caps (autoplug, caps, targetcaps, NULL);

      padname = "src_00";
    }
#endif /* GST_DISABLE_AUTOPLUG */
  }

  if (!new_element && (media_type == AVI_TYPE_VIDEO)) {
    padname = "src";
  }
  else if (!new_element && (media_type == AVI_TYPE_AUDIO)) {
    /*FIXME */
    padname = "src";
  }

  if (new_element) {
    gst_pad_connect (pad, gst_element_get_pad (new_element, "sink"));
    gst_element_set_name (new_element, g_strdup_printf ("element%d", avi_decoder->count));
    gst_bin_add (GST_BIN (avi_decoder), new_element);

    gst_element_add_ghost_pad (GST_ELEMENT (avi_decoder), 
	    gst_element_get_pad (new_element, padname), gpadname);

    avi_decoder->count++;
  }
  else {
    g_warning ("avidecoder: could not autoplug\n");
  }

done: 
  gst_element_set_state (GST_ELEMENT (avi_decoder), GST_STATE_PLAYING);
}

static void 
gst_avi_decoder_init (GstAviDecoder *avi_decoder) 
{
  avi_decoder->demuxer = gst_elementfactory_make ("avidemux", "demux");

  if (avi_decoder->demuxer) {
    gst_bin_add (GST_BIN (avi_decoder), avi_decoder->demuxer);

    gst_element_add_ghost_pad (GST_ELEMENT (avi_decoder), 
		    gst_element_get_pad (avi_decoder->demuxer, "sink"), "sink");

    g_signal_connect (G_OBJECT (avi_decoder->demuxer),"new_pad", G_CALLBACK (gst_avi_decoder_new_pad),
		    avi_decoder);
  }
  else {
    g_warning ("wow!, no avi demuxer found. help me\n");
  }

  avi_decoder->count = 0;
  avi_decoder->audio_count = 0;
  avi_decoder->video_count = 0;
}

static GstCaps*
avi_typefind (GstBuffer *buf,
              gpointer private)
{
  gchar *data = GST_BUFFER_DATA (buf);
  GstCaps *new;

  GST_DEBUG (0,"avi_decoder: typefind");
  if (strncmp (&data[0], "RIFF", 4)) return NULL;
  if (strncmp (&data[8], "AVI ", 4)) return NULL;

  new = GST_CAPS_NEW ("avi_typefind",
		      "video/avi", 
		        "RIFF", GST_PROPS_STRING ("AVI"));

  return new;
}

static void
gst_avi_decoder_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
  GstAviDecoder *src;

  g_return_if_fail (GST_IS_AVI_DECODER (object));

  src = GST_AVI_DECODER (object);

  switch(prop_id) {
    case ARG_BITRATE:
      break;
    case ARG_MEDIA_TIME:
      g_value_set_long (value, gst_util_get_long_arg (G_OBJECT (src->demuxer), "media_time"));
      break;
    case ARG_CURRENT_TIME:
      g_value_set_long (value, gst_util_get_long_arg (G_OBJECT (src->demuxer), "current_time"));
      break;
    default:
      break;
  }
}


static gboolean
plugin_init (GModule *module, GstPlugin *plugin)
{
  GstElementFactory *factory;
  GstTypeFactory *type;

  /* create an elementfactory for the avi_decoder element */
  factory = gst_elementfactory_new ("avidecoder", GST_TYPE_AVI_DECODER,
                                    &gst_avi_decoder_details);
  g_return_val_if_fail (factory != NULL, FALSE);

  gst_elementfactory_add_padtemplate (factory, GST_PADTEMPLATE_GET (src_audio_templ));
  gst_elementfactory_add_padtemplate (factory, GST_PADTEMPLATE_GET (src_video_templ));
  gst_elementfactory_add_padtemplate (factory, GST_PADTEMPLATE_GET (sink_templ));

  type = gst_typefactory_new (&avidefinition);
  gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (type));

  gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));

  return TRUE;
}

GstPluginDesc plugin_desc = {
  GST_VERSION_MAJOR,
  GST_VERSION_MINOR,
  "avidecoder",
  plugin_init
};