gstffmpegdec.c 14.5 KB
Newer Older
Andy Wingo Wingo's avatar
Andy Wingo Wingo committed
1
/* GStreamer
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
 * 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.
 */

20 21
#include "config.h"

22
#include <assert.h>
23
#include <string.h>
24

25 26 27 28 29
#ifdef HAVE_FFMPEG_UNINSTALLED
#include <avcodec.h>
#else
#include <ffmpeg/avcodec.h>
#endif
30 31 32

#include <gst/gst.h>

33
#include "gstffmpegcodecmap.h"
34

35 36 37 38 39 40 41 42 43 44
typedef struct _GstFFMpegDec GstFFMpegDec;

struct _GstFFMpegDec {
  GstElement element;

  /* We need to keep track of our pads, so we do so here. */
  GstPad *srcpad;
  GstPad *sinkpad;

  AVCodecContext *context;
45
  AVFrame *picture;
46
  gboolean opened;
47 48 49 50 51 52 53 54
};

typedef struct _GstFFMpegDecClass GstFFMpegDecClass;

struct _GstFFMpegDecClass {
  GstElementClass parent_class;

  AVCodec *in_plugin;
55
  GstPadTemplate *srctempl, *sinktempl;
56 57
};

Ronald S. Bultje's avatar
Bla  
Ronald S. Bultje committed
58 59 60
typedef struct _GstFFMpegDecClassParams GstFFMpegDecClassParams;

struct _GstFFMpegDecClassParams {
61
  AVCodec *in_plugin;
Ronald S. Bultje's avatar
Bla  
Ronald S. Bultje committed
62 63
  GstCaps *srccaps, *sinkcaps;
};
64

65 66 67 68 69 70 71 72 73 74
#define GST_TYPE_FFMPEGDEC \
  (gst_ffmpegdec_get_type())
#define GST_FFMPEGDEC(obj) \
  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_FFMPEGDEC,GstFFMpegDec))
#define GST_FFMPEGDEC_CLASS(klass) \
  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_FFMPEGDEC,GstFFMpegDecClass))
#define GST_IS_FFMPEGDEC(obj) \
  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_FFMPEGDEC))
#define GST_IS_FFMPEGDEC_CLASS(obj) \
  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_FFMPEGDEC))
75 76 77 78 79 80 81 82 83 84 85 86 87 88

enum {
  /* FILL ME */
  LAST_SIGNAL
};

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

static GHashTable *global_plugins;

/* A number of functon prototypes are given so we can refer to them later. */
Ronald S. Bultje's avatar
Bla  
Ronald S. Bultje committed
89
static void	gst_ffmpegdec_base_init		(GstFFMpegDecClass *klass);
90 91
static void	gst_ffmpegdec_class_init	(GstFFMpegDecClass *klass);
static void	gst_ffmpegdec_init		(GstFFMpegDec *ffmpegdec);
92 93 94 95 96
static void	gst_ffmpegdec_dispose		(GObject      *object);

static GstPadLinkReturn	gst_ffmpegdec_connect	(GstPad    *pad,
						 GstCaps   *caps);
static void	gst_ffmpegdec_chain		(GstPad    *pad,
97
						 GstData   *data);
98

99 100
static GstElementStateReturn
		gst_ffmpegdec_change_state	(GstElement *element);
101

102
#if 0
103 104 105 106 107
/* some sort of bufferpool handling, but different */
static int	gst_ffmpegdec_get_buffer	(AVCodecContext *context,
						 AVFrame        *picture);
static void	gst_ffmpegdec_release_buffer	(AVCodecContext *context,
						 AVFrame        *picture);
108
#endif
109 110 111

static GstElementClass *parent_class = NULL;

112
/*static guint gst_ffmpegdec_signals[LAST_SIGNAL] = { 0 }; */
113

Ronald S. Bultje's avatar
Bla  
Ronald S. Bultje committed
114 115 116 117 118 119 120 121 122 123 124
static void
gst_ffmpegdec_base_init (GstFFMpegDecClass *klass)
{
  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
  GstFFMpegDecClassParams *params;
  GstElementDetails *details;
  GstPadTemplate *sinktempl, *srctempl;

  params = g_hash_table_lookup (global_plugins,
		GINT_TO_POINTER (G_OBJECT_CLASS_TYPE (gobject_class)));
125 126 127 128
  if (!params)
    params = g_hash_table_lookup (global_plugins,
		GINT_TO_POINTER (0));
  g_assert (params);
Ronald S. Bultje's avatar
Bla  
Ronald S. Bultje committed
129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156

  /* construct the element details struct */
  details = g_new0 (GstElementDetails, 1);
  details->longname = g_strdup_printf("FFMPEG %s decoder",
				      params->in_plugin->name);
  details->klass = g_strdup_printf("Codec/%s/Decoder",
				   (params->in_plugin->type == CODEC_TYPE_VIDEO) ?
				   "Video" : "Audio");
  details->description = g_strdup_printf("FFMPEG %s decoder",
					 params->in_plugin->name);
  details->author = g_strdup("Wim Taymans <wim.taymans@chello.be>\n"
			     "Ronald Bultje <rbultje@ronald.bitfreak.net>");

  /* pad templates */
  sinktempl = gst_pad_template_new ("sink", GST_PAD_SINK,
				    GST_PAD_ALWAYS, params->sinkcaps, NULL);
  srctempl = gst_pad_template_new ("src", GST_PAD_SRC,
				   GST_PAD_ALWAYS, params->srccaps, NULL);

  gst_element_class_add_pad_template (element_class, srctempl);
  gst_element_class_add_pad_template (element_class, sinktempl);
  gst_element_class_set_details (element_class, details);

  klass->in_plugin = params->in_plugin;
  klass->srctempl = srctempl;
  klass->sinktempl = sinktempl;
}

157 158 159 160 161 162 163 164 165 166 167
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);

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
  gobject_class->dispose = gst_ffmpegdec_dispose;
  gstelement_class->change_state = gst_ffmpegdec_change_state;
}

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

  /* setup pads */
  ffmpegdec->sinkpad = gst_pad_new_from_template (oclass->sinktempl, "sink");
  gst_pad_set_link_function (ffmpegdec->sinkpad, gst_ffmpegdec_connect);
  gst_pad_set_chain_function (ffmpegdec->sinkpad, gst_ffmpegdec_chain);
  ffmpegdec->srcpad = gst_pad_new_from_template (oclass->srctempl, "src");

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

  /* some ffmpeg data */
  ffmpegdec->context = avcodec_alloc_context();
  ffmpegdec->picture = avcodec_alloc_frame();

  ffmpegdec->opened = FALSE;
}

static void
gst_ffmpegdec_dispose (GObject *object)
{
  GstFFMpegDec *ffmpegdec = (GstFFMpegDec *) object;
  /* close old session */
  if (ffmpegdec->opened) {
    avcodec_close (ffmpegdec->context);
    ffmpegdec->opened = FALSE;
  }
202

203 204 205
  /* clean up remaining allocated data */
  av_free (ffmpegdec->context);
  av_free (ffmpegdec->picture);
206 207
}

Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
208
static GstPadLinkReturn
209 210
gst_ffmpegdec_connect (GstPad  *pad,
		       GstCaps *caps)
211 212 213 214
{
  GstFFMpegDec *ffmpegdec = (GstFFMpegDec *)(gst_pad_get_parent (pad));
  GstFFMpegDecClass *oclass = (GstFFMpegDecClass*)(G_OBJECT_GET_CLASS (ffmpegdec));

215
  /* we want fixed caps */
216
  if (!GST_CAPS_IS_FIXED (caps))
217
    return GST_PAD_LINK_DELAYED;
218

219 220 221 222 223
  /* close old session */
  if (ffmpegdec->opened) {
    avcodec_close (ffmpegdec->context);
    ffmpegdec->opened = FALSE;
  }
224

225 226
  /* set defaults */
  avcodec_get_context_defaults (ffmpegdec->context);
227

228
#if 0
229 230 231
  /* set buffer functions */
  ffmpegdec->context->get_buffer = gst_ffmpegdec_get_buffer;
  ffmpegdec->context->release_buffer = gst_ffmpegdec_release_buffer;
232
#endif
233

234 235 236
  /* get size and so */
  gst_ffmpeg_caps_to_codectype (oclass->in_plugin->type,
				caps, ffmpegdec->context);
237

238 239 240 241
  /* we dont send complete frames */
  if (oclass->in_plugin->capabilities & CODEC_CAP_TRUNCATED)
    ffmpegdec->context->flags |= CODEC_FLAG_TRUNCATED;

242 243 244
  /* do *not* draw edges */
  ffmpegdec->context->flags |= CODEC_FLAG_EMU_EDGE;

245 246 247
  /* open codec - we don't select an output pix_fmt yet,
   * simply because we don't know! We only get it
   * during playback... */
248
  if (avcodec_open (ffmpegdec->context, oclass->in_plugin) < 0) {
249
    GST_DEBUG (
250 251
		"ffdec_%s: Failed to open FFMPEG codec",
		oclass->in_plugin->name);
252
    return GST_PAD_LINK_REFUSED;
253
  }
254 255 256 257

  /* done! */
  ffmpegdec->opened = TRUE;

258
  return GST_PAD_LINK_OK;
259 260
}

261
#if 0
262 263 264 265 266 267 268 269 270
static int
gst_ffmpegdec_get_buffer (AVCodecContext *context,
			  AVFrame        *picture)
{
  GstBuffer *buf = NULL;
  gulong bufsize = 0;

  switch (context->codec_type) {
    case CODEC_TYPE_VIDEO:
271
      bufsize = avpicture_get_size (context->pix_fmt,
272 273 274 275 276 277
				    context->width,
				    context->height);
      buf = gst_buffer_new_and_alloc (bufsize);
      avpicture_fill ((AVPicture *) picture, GST_BUFFER_DATA (buf),
		      context->pix_fmt,
		      context->width, context->height);
278 279 280 281 282 283
      break;

    case CODEC_TYPE_AUDIO:
    default:
      g_assert (0);
      break;
284 285
  }

286 287 288 289 290 291 292 293 294 295 296 297 298
  /* tell ffmpeg we own this buffer
   *
   * we also use an evil hack (keep buffer in base[0])
   * to keep a reference to the buffer in release_buffer(),
   * so that we can ref() it here and unref() it there
   * so that we don't need to copy data */
  picture->type = FF_BUFFER_TYPE_USER;
  picture->age = G_MAXINT;
  picture->base[0] = (int8_t *) buf;
  gst_buffer_ref (buf);

  return 0;
}
299

300 301 302 303 304 305 306 307 308 309 310 311 312
static void
gst_ffmpegdec_release_buffer (AVCodecContext *context,
			      AVFrame        *picture)
{
  gint i;
  GstBuffer *buf = GST_BUFFER (picture->base[0]);
  gst_buffer_unref (buf);

  /* zero out the reference in ffmpeg */
  for (i=0;i<4;i++) {
    picture->data[i] = NULL;
    picture->linesize[i] = 0;
  }
313
}
314
#endif
315 316

static void
317
gst_ffmpegdec_chain (GstPad    *pad,
318
		     GstData *_data)
319
{
320
  GstBuffer *inbuf = GST_BUFFER (_data);
321
  GstBuffer *outbuf = NULL;
322
  GstFFMpegDec *ffmpegdec = (GstFFMpegDec *)(gst_pad_get_parent (pad));
323
  GstFFMpegDecClass *oclass = (GstFFMpegDecClass*)(G_OBJECT_GET_CLASS (ffmpegdec));
324
  guchar *data;
325 326 327
  gint size, len = 0;
  gint have_data;

Ronald S. Bultje's avatar
Ronald S. Bultje committed
328
  if (!ffmpegdec->opened) {
329 330 331
    gst_element_error (GST_ELEMENT (ffmpegdec),
		       "ffdec_%s: input format was not set before data-start",
		       oclass->in_plugin->name);
Ronald S. Bultje's avatar
Ronald S. Bultje committed
332 333 334
    return;
  }

335 336 337 338
  /* FIXME: implement event awareness (especially EOS
   * (av_close_codec ()) and FLUSH/DISCONT
   * (avcodec_flush_buffers ()))
   */
339 340 341 342 343 344 345

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

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

346 347 348 349 350 351
    switch (oclass->in_plugin->type) {
      case CODEC_TYPE_VIDEO:
        len = avcodec_decode_video (ffmpegdec->context,
				    ffmpegdec->picture,
				    &have_data,
				    data, size);
352
        if (have_data) {
353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370
          /* libavcodec constantly crashes on stupid buffer allocation
           * errors inside. This drives me crazy, so we let it allocate
           * it's own buffers and copy to our own buffer afterwards... */
          AVPicture pic;
          gint size = avpicture_get_size (ffmpegdec->context->pix_fmt,
					  ffmpegdec->context->width,
					  ffmpegdec->context->height);
          outbuf = gst_buffer_new_and_alloc (size);
          avpicture_fill (&pic, GST_BUFFER_DATA (outbuf),
			  ffmpegdec->context->pix_fmt,
			  ffmpegdec->context->width,
			  ffmpegdec->context->height);
          img_convert (&pic, ffmpegdec->context->pix_fmt,
		       (AVPicture *) ffmpegdec->picture,
		       ffmpegdec->context->pix_fmt,
		       ffmpegdec->context->width,
		       ffmpegdec->context->height);

371 372 373
          /* this isn't necessarily true, but it's better than nothing */
          GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (inbuf);
        }
374
        break;
375

376
      case CODEC_TYPE_AUDIO:
377
        outbuf = gst_buffer_new_and_alloc (AVCODEC_MAX_AUDIO_FRAME_SIZE);
378
        len = avcodec_decode_audio (ffmpegdec->context,
379
				    (int16_t *) GST_BUFFER_DATA (outbuf),
380 381
				    &have_data,
				    data, size);
382 383 384 385 386 387 388 389
        if (have_data) {
          GST_BUFFER_SIZE (outbuf) = have_data;
          GST_BUFFER_DURATION (outbuf) = (have_data * GST_SECOND) /
					   (ffmpegdec->context->channels *
					    ffmpegdec->context->sample_rate);
        } else {
          gst_buffer_unref (outbuf);
        } 
390 391 392 393 394
        break;
      default:
	g_assert(0);
        break;
    }
395 396

    if (len < 0) {
397 398
      g_warning ("ffdec_%s: decoding error",
		 oclass->in_plugin->name);
399 400 401
      break;
    }

402
    if (have_data) {
403
      if (!GST_PAD_CAPS (ffmpegdec->srcpad)) {
404 405 406 407 408
        GstCaps *caps;
        caps = gst_ffmpeg_codectype_to_caps (oclass->in_plugin->type,
					     ffmpegdec->context);
        if (caps == NULL ||
            gst_pad_try_set_caps (ffmpegdec->srcpad, caps) <= 0) {
409 410 411
          gst_element_error (GST_ELEMENT (ffmpegdec),
			     "Failed to link ffmpeg decoder (%s) to next element",
			     oclass->in_plugin->name);
412 413
          return;
        }
414 415 416
      }

      GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (inbuf);
417

418
      gst_pad_push (ffmpegdec->srcpad, GST_DATA (outbuf));
419 420 421 422
    } 

    size -= len;
    data += len;
423
  } while (size > 0);
424 425 426 427

  gst_buffer_unref (inbuf);
}

428 429
static GstElementStateReturn
gst_ffmpegdec_change_state (GstElement *element)
430
{
431 432 433 434 435 436 437 438 439
  GstFFMpegDec *ffmpegdec = (GstFFMpegDec *) element;
  gint transition = GST_STATE_TRANSITION (element);

  switch (transition) {
    case GST_STATE_PAUSED_TO_READY:
      if (ffmpegdec->opened) {
        avcodec_close (ffmpegdec->context);
        ffmpegdec->opened = FALSE;
      }
440 441 442
      break;
  }

443 444
  if (GST_ELEMENT_CLASS (parent_class)->change_state)
    return GST_ELEMENT_CLASS (parent_class)->change_state (element);
445

446
  return GST_STATE_SUCCESS;
447 448 449 450 451 452 453
}

gboolean
gst_ffmpegdec_register (GstPlugin *plugin)
{
  GTypeInfo typeinfo = {
    sizeof(GstFFMpegDecClass),      
Ronald S. Bultje's avatar
Bla  
Ronald S. Bultje committed
454
    (GBaseInitFunc)gst_ffmpegdec_base_init,
455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470
    NULL,
    (GClassInitFunc)gst_ffmpegdec_class_init,
    NULL,
    NULL,
    sizeof(GstFFMpegDec),
    0,
    (GInstanceInitFunc)gst_ffmpegdec_init,
  };
  GType type;
  AVCodec *in_plugin;
  
  in_plugin = first_avcodec;

  global_plugins = g_hash_table_new (NULL, NULL);

  while (in_plugin) {
471
    GstFFMpegDecClassParams *params;
Ronald S. Bultje's avatar
Bla  
Ronald S. Bultje committed
472 473
    GstCaps *srccaps, *sinkcaps;
    gchar *type_name;
474

Ronald S. Bultje's avatar
Ronald S. Bultje committed
475 476 477
    /* no quasi-codecs, please */
    if (in_plugin->id == CODEC_ID_RAWVIDEO ||
	(in_plugin->id >= CODEC_ID_PCM_S16LE &&
Ronald S. Bultje's avatar
Ronald S. Bultje committed
478
	 in_plugin->id <= CODEC_ID_PCM_ALAW)) {
Ronald S. Bultje's avatar
Ronald S. Bultje committed
479
      goto next;
480
    }
Ronald S. Bultje's avatar
Ronald S. Bultje committed
481 482 483

    /* only decoders */
    if (!in_plugin->decode) {
484 485
      goto next;
    }
486 487 488 489 490 491 492

    /* first make sure we've got a supported type */
    sinkcaps = gst_ffmpeg_codecid_to_caps (in_plugin->id, NULL);
    srccaps  = gst_ffmpeg_codectype_to_caps (in_plugin->type, NULL);
    if (!sinkcaps || !srccaps)
      goto next;

493
    /* construct the type */
Ronald S. Bultje's avatar
Ronald S. Bultje committed
494
    type_name = g_strdup_printf("ffdec_%s", in_plugin->name);
495

496
    /* if it's already registered, drop it */
497 498 499 500 501
    if (g_type_from_name(type_name)) {
      g_free(type_name);
      goto next;
    }

502 503 504 505 506 507 508 509
    params = g_new0 (GstFFMpegDecClassParams, 1);
    params->in_plugin = in_plugin;
    params->srccaps = srccaps;
    params->sinkcaps = sinkcaps;
    g_hash_table_insert (global_plugins, 
		         GINT_TO_POINTER (0), 
			 (gpointer) params);
    
Ronald S. Bultje's avatar
Bla  
Ronald S. Bultje committed
510
    /* create the gtype now */
511
    type = g_type_register_static(GST_TYPE_ELEMENT, type_name , &typeinfo, 0);
Ronald S. Bultje's avatar
Bla  
Ronald S. Bultje committed
512 513
    if (!gst_element_register (plugin, type_name, GST_RANK_MARGINAL, type))
      return FALSE;
514

515 516 517
    g_hash_table_insert (global_plugins, 
		         GINT_TO_POINTER (type), 
			 (gpointer) params);
518 519 520 521

next:
    in_plugin = in_plugin->next;
  }
522
  g_hash_table_remove (global_plugins, GINT_TO_POINTER (0));
523 524 525

  return TRUE;
}