gstffmpegdec.c 11 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116
/* Gnome-Streamer
 * 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.
 */

#include "gstffmpegdec.h"

#include <string.h>

enum {
  /* FILL ME */
  LAST_SIGNAL
};

enum {
  ARG_0,
  /* FILL ME */
};

/* This factory is much simpler, and defines the source pad. */
GST_PADTEMPLATE_FACTORY (gst_ffmpegdec_sink_factory,
  "sink",
  GST_PAD_SINK,
  GST_PAD_ALWAYS,
  GST_CAPS_NEW (
    "ffmpegdec_sink",
    "video/avi",
      "format",		GST_PROPS_STRING ("strf_vids")
  )
)

/* This factory is much simpler, and defines the source pad. */
GST_PADTEMPLATE_FACTORY (gst_ffmpegdec_audio_src_factory,
  "src",
  GST_PAD_SRC,
  GST_PAD_ALWAYS,
  GST_CAPS_NEW (
    "ffmpegdec_src",
    "audio/raw",
      "format",       GST_PROPS_STRING ("int"),
        "law",        GST_PROPS_INT (0),
        "endianness", GST_PROPS_INT (G_BYTE_ORDER),
        "signed",     GST_PROPS_BOOLEAN (TRUE),
        "width",      GST_PROPS_INT (16),
	"depth",      GST_PROPS_INT (16),
        "rate",       GST_PROPS_INT_RANGE (8000, 96000),
        "channels",   GST_PROPS_INT_RANGE (1, 2)
  )
)

/* This factory is much simpler, and defines the source pad. */
GST_PADTEMPLATE_FACTORY (gst_ffmpegdec_video_src_factory,
  "src",
  GST_PAD_SRC,
  GST_PAD_ALWAYS,
  GST_CAPS_NEW (
    "ffmpegdec_src",
    "video/raw",
      "format",       GST_PROPS_LIST (
	                GST_PROPS_FOURCC (GST_STR_FOURCC ("I420"))
		      ),
        "width",      GST_PROPS_INT_RANGE (16, 4096),
        "height",     GST_PROPS_INT_RANGE (16, 4096)
  )
)

static GHashTable *global_plugins;

/* A number of functon prototypes are given so we can refer to them later. */
static void	gst_ffmpegdec_class_init	(GstFFMpegDecClass *klass);
static void	gst_ffmpegdec_init		(GstFFMpegDec *ffmpegdec);

static void	gst_ffmpegdec_chain_audio	(GstPad *pad, GstBuffer *buffer);
static void	gst_ffmpegdec_chain_video	(GstPad *pad, GstBuffer *buffer);

static void	gst_ffmpegdec_set_property	(GObject *object, guint prop_id, const GValue *value, 
						 GParamSpec *pspec);
static void	gst_ffmpegdec_get_property	(GObject *object, guint prop_id, GValue *value, 
						 GParamSpec *pspec);

static GstElementClass *parent_class = NULL;

//static guint gst_ffmpegdec_signals[LAST_SIGNAL] = { 0 };

static void
gst_ffmpegdec_class_init (GstFFMpegDecClass *klass)
{
  GObjectClass *gobject_class;
  GstElementClass *gstelement_class;

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

  parent_class = g_type_class_ref(GST_TYPE_ELEMENT);

  klass->in_plugin = g_hash_table_lookup (global_plugins,
		  GINT_TO_POINTER (G_OBJECT_CLASS_TYPE (gobject_class)));

  gobject_class->set_property = gst_ffmpegdec_set_property;
  gobject_class->get_property = gst_ffmpegdec_get_property;
}

117 118
static GstPadConnectReturn
gst_ffmpegdec_sinkconnect (GstPad *pad, GstCaps *caps)
119 120 121 122
{
  GstFFMpegDec *ffmpegdec = (GstFFMpegDec *)(gst_pad_get_parent (pad));
  GstFFMpegDecClass *oclass = (GstFFMpegDecClass*)(G_OBJECT_GET_CLASS (ffmpegdec));

123 124 125
  if (!GST_CAPS_IS_FIXED (caps))
    return GST_PAD_CONNECT_DELAYED;

126 127 128 129 130 131 132 133 134
  ffmpegdec->context->width = gst_caps_get_int (caps, "width");
  ffmpegdec->context->height = gst_caps_get_int (caps, "height");
  ffmpegdec->context->pix_fmt = PIX_FMT_YUV420P;
  ffmpegdec->context->frame_rate = 23 * FRAME_RATE_BASE;
  ffmpegdec->context->bit_rate = 0;

  /* FIXME bug in ffmpeg */
  if (avcodec_open (ffmpegdec->context, avcodec_find_encoder(CODEC_ID_MPEG1VIDEO)) <0 ) {
    g_warning ("ffmpegdec: could not open codec");
135
    return GST_PAD_CONNECT_REFUSED;
136 137 138 139
  }

  if (avcodec_open (ffmpegdec->context, oclass->in_plugin) < 0) {
    g_warning ("ffmpegdec: could not open codec");
140
    return GST_PAD_CONNECT_REFUSED;
141
  }
142
  return GST_PAD_CONNECT_OK;
143 144 145 146 147 148 149 150 151 152 153
}

static void
gst_ffmpegdec_init(GstFFMpegDec *ffmpegdec)
{
  GstFFMpegDecClass *oclass = (GstFFMpegDecClass*)(G_OBJECT_GET_CLASS (ffmpegdec));

  ffmpegdec->context = g_malloc0 (sizeof (AVCodecContext));

  ffmpegdec->sinkpad = gst_pad_new_from_template (
		  GST_PADTEMPLATE_GET (gst_ffmpegdec_sink_factory), "sink");
154
  gst_pad_set_connect_function (ffmpegdec->sinkpad, gst_ffmpegdec_sinkconnect);
155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218

  if (oclass->in_plugin->type == CODEC_TYPE_VIDEO) {
    ffmpegdec->srcpad = gst_pad_new_from_template (
		  GST_PADTEMPLATE_GET (gst_ffmpegdec_video_src_factory), "src");
    gst_pad_set_chain_function (ffmpegdec->sinkpad, gst_ffmpegdec_chain_video);
  }
  else if (oclass->in_plugin->type == CODEC_TYPE_AUDIO) {
    ffmpegdec->srcpad = gst_pad_new_from_template (
		  GST_PADTEMPLATE_GET (gst_ffmpegdec_audio_src_factory), "src");
    gst_pad_set_chain_function (ffmpegdec->sinkpad, gst_ffmpegdec_chain_audio);
  }

  gst_element_add_pad (GST_ELEMENT (ffmpegdec), ffmpegdec->sinkpad);
  gst_element_add_pad (GST_ELEMENT (ffmpegdec), ffmpegdec->srcpad);

  ffmpegdec->picture = g_malloc0 (sizeof (AVPicture));
}

static void
gst_ffmpegdec_chain_audio (GstPad *pad, GstBuffer *inbuf)
{
  //GstFFMpegDec *ffmpegdec = (GstFFMpegDec *)(gst_pad_get_parent (pad));
  gpointer data;
  gint size;

  data = GST_BUFFER_DATA (inbuf);
  size = GST_BUFFER_SIZE (inbuf);

  GST_DEBUG (0, "got buffer %p %d\n", data, size);

  gst_buffer_unref (inbuf);
}

static void
gst_ffmpegdec_chain_video (GstPad *pad, GstBuffer *inbuf)
{
  GstBuffer *outbuf;
  GstFFMpegDec *ffmpegdec = (GstFFMpegDec *)(gst_pad_get_parent (pad));
  guchar *data;
  gint size, frame_size, len;
  gint have_picture;

  data = GST_BUFFER_DATA (inbuf);
  size = GST_BUFFER_SIZE (inbuf);

  do {
    ffmpegdec->context->frame_number++;

    len = avcodec_decode_video (ffmpegdec->context, ffmpegdec->picture,
		  &have_picture, data, size);

    if (len < 0) {
      g_warning ("ffmpegdec: decoding error");
      break;
    }

    if (have_picture) {
      guchar *picdata, *picdata2, *outdata, *outdata2;
      gint xsize, i, width, height;

      width = ffmpegdec->context->width;
      height = ffmpegdec->context->height;

      if (!GST_PAD_CAPS (ffmpegdec->srcpad)) {
219
        gst_pad_try_set_caps (ffmpegdec->srcpad, 
220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384
		      GST_CAPS_NEW (
			"ffmpegdec_src",
			"video/raw",
			  "format",	GST_PROPS_FOURCC (GST_STR_FOURCC ("I420")),
			    "width",	GST_PROPS_INT (width),
			    "height",	GST_PROPS_INT (height)
		      ));
      }

      frame_size = width * height;

      outbuf = gst_buffer_new ();
      GST_BUFFER_SIZE (outbuf) = (frame_size*3)>>1;
      outdata = GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf));
      GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (inbuf);
 
      picdata = ffmpegdec->picture->data[0];
      xsize = ffmpegdec->picture->linesize[0];
      for (i=height; i; i--) {
        memcpy (outdata, picdata, width);
        outdata += width;
        picdata += xsize;
      }

      frame_size >>= 2;
      width >>= 1;
      height >>= 1;
      outdata2 = outdata + frame_size;

      picdata = ffmpegdec->picture->data[1];
      picdata2 = ffmpegdec->picture->data[2];
      xsize = ffmpegdec->picture->linesize[1];
      for (i=height; i; i--) {
        memcpy (outdata, picdata, width);
        memcpy (outdata2, picdata2, width);
        outdata += width; outdata2 += width;
        picdata += xsize; picdata2 += xsize;
      }

      gst_pad_push (ffmpegdec->srcpad, outbuf);
    } 

    size -= len;
    data += len;
  }
  while (size > 0);

  gst_buffer_unref (inbuf);
}

static void
gst_ffmpegdec_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
  GstFFMpegDec *ffmpegdec;

  /* Get a pointer of the right type. */
  ffmpegdec = (GstFFMpegDec *)(object);

  /* Check the argument id to see which argument we're setting. */
  switch (prop_id) {
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

/* The set function is simply the inverse of the get fuction. */
static void
gst_ffmpegdec_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
  GstFFMpegDec *ffmpegdec;

  /* It's not null if we got it, but it might not be ours */
  ffmpegdec = (GstFFMpegDec *)(object);

  switch (prop_id) {
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

gboolean
gst_ffmpegdec_register (GstPlugin *plugin)
{
  GstElementFactory *factory;
  GTypeInfo typeinfo = {
    sizeof(GstFFMpegDecClass),      
    NULL,
    NULL,
    (GClassInitFunc)gst_ffmpegdec_class_init,
    NULL,
    NULL,
    sizeof(GstFFMpegDec),
    0,
    (GInstanceInitFunc)gst_ffmpegdec_init,
  };
  GType type;
  GstElementDetails *details;
  AVCodec *in_plugin;
  
  in_plugin = first_avcodec;

  global_plugins = g_hash_table_new (NULL, NULL);

  while (in_plugin) {
    gchar *type_name;
    gchar *codec_type;

    if (in_plugin->decode) {
      codec_type = "dec";
    }
    else {
      goto next;
    }
    // construct the type
    type_name = g_strdup_printf("ffmpeg%s_%s", codec_type, in_plugin->name);

    // if it's already registered, drop it
    if (g_type_from_name(type_name)) {
      g_free(type_name);
      goto next;
    }

    // create the gtk type now
    type = g_type_register_static(GST_TYPE_ELEMENT, type_name , &typeinfo, 0);

    // construct the element details struct
    details = g_new0 (GstElementDetails,1);
    details->longname = g_strdup (in_plugin->name);
    details->klass = "Codec/FFMpeg";
    details->description = g_strdup (in_plugin->name);
    details->version = g_strdup("1.0.0");
    details->author = g_strdup("The FFMPEG crew, GStreamer plugin by Wim Taymans <wim.taymans@chello.be>");
    details->copyright = g_strdup("(c) 2001");

    g_hash_table_insert (global_plugins, 
		         GINT_TO_POINTER (type), 
			 (gpointer) in_plugin);

    // register the plugin with gstreamer
    factory = gst_elementfactory_new(type_name,type,details);
    g_return_val_if_fail(factory != NULL, FALSE);

    gst_elementfactory_add_padtemplate (factory, 
		    GST_PADTEMPLATE_GET (gst_ffmpegdec_sink_factory));

    if (in_plugin->type == CODEC_TYPE_VIDEO) {
      gst_elementfactory_add_padtemplate (factory, 
		    GST_PADTEMPLATE_GET (gst_ffmpegdec_video_src_factory));
    }
    else if (in_plugin->type == CODEC_TYPE_AUDIO) {
      gst_elementfactory_add_padtemplate (factory, 
		    GST_PADTEMPLATE_GET (gst_ffmpegdec_audio_src_factory));
    }

    /* The very last thing is to register the elementfactory with the plugin. */
    gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));

next:
    in_plugin = in_plugin->next;
  }

  return TRUE;
}