gst/vaapi/gstvaapidecode.c

   1 /*
   2  *  gstvaapidecode.c - VA-API video decoder
   3  *
   4  *  Copyright (C) 2010-2011 Splitted-Desktop Systems
   5  *  Copyright (C) 2011-2013 Intel Corporation
   6  *
   7  *  This library is free software; you can redistribute it and/or
   8  *  modify it under the terms of the GNU Lesser General Public License
   9  *  as published by the Free Software Foundation; either version 2.1
  10  *  of the License, or (at your option) any later version.
  11  *
  12  *  This library is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  *  Lesser General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU Lesser General Public
  18  *  License along with this library; if not, write to the Free
  19  *  Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20  *  Boston, MA 02110-1301 USA
  21 */
  22
  23 /**
  24  * SECTION:gstvaapidecode
  25  * @short_description: A VA-API based video decoder
  26  *
  27  * vaapidecode decodes from raw bitstreams to surfaces suitable for
  28  * the vaapisink element.
  29  */
  30
  31 #include "gst/vaapi/sysdeps.h"
  32 #include <gst/vaapi/gstvaapidisplay.h>
  33
  34 #include "gstvaapidecode.h"
  35 #include "gstvaapipluginutil.h"
  36 #include "gstvaapivideocontext.h"
  37 #include "gstvaapivideobuffer.h"
  38 #if GST_CHECK_VERSION(1,1,0)
  39 #include "gstvaapivideometa_texture.h"
  40 #endif
  41 #if GST_CHECK_VERSION(1,0,0)
  42 #include "gstvaapivideobufferpool.h"
  43 #include "gstvaapivideomemory.h"
  44 #endif
  45
  46 #include <gst/vaapi/gstvaapidecoder_h264.h>
  47 #include <gst/vaapi/gstvaapidecoder_jpeg.h>
  48 #include <gst/vaapi/gstvaapidecoder_mpeg2.h>
  49 #include <gst/vaapi/gstvaapidecoder_mpeg4.h>
  50 #include <gst/vaapi/gstvaapidecoder_vc1.h>
  51
  52 #define GST_PLUGIN_NAME "vaapidecode"
  53 #define GST_PLUGIN_DESC "A VA-API based video decoder"
  54
  55 GST_DEBUG_CATEGORY_STATIC(gst_debug_vaapidecode);
  56 #define GST_CAT_DEFAULT gst_debug_vaapidecode
  57
  58 /* Default templates */
  59 #define GST_CAPS_CODEC(CODEC) CODEC "; "
  60
  61 static const char gst_vaapidecode_sink_caps_str[] =
  62     GST_CAPS_CODEC("video/mpeg, mpegversion=2, systemstream=(boolean)false")
  63     GST_CAPS_CODEC("video/mpeg, mpegversion=4")
  64     GST_CAPS_CODEC("video/x-divx")
  65     GST_CAPS_CODEC("video/x-xvid")
  66     GST_CAPS_CODEC("video/x-h263")
  67     GST_CAPS_CODEC("video/x-h264")
  68     GST_CAPS_CODEC("video/x-wmv")
  69     GST_CAPS_CODEC("image/jpeg")
  70     ;
  71
  72 static const char gst_vaapidecode_src_caps_str[] =
  73 #if GST_CHECK_VERSION(1,1,0)
  74     GST_VIDEO_CAPS_MAKE_WITH_FEATURES(
  75         GST_CAPS_FEATURE_MEMORY_VAAPI_SURFACE, "{ ENCODED, NV12, I420, YV12 }") ";"
  76     GST_VIDEO_CAPS_MAKE_WITH_FEATURES(
  77         GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META, "RGBA");
  78 #else
  79     GST_VAAPI_SURFACE_CAPS;
  80 #endif
  81
  82 static GstStaticPadTemplate gst_vaapidecode_sink_factory =
  83     GST_STATIC_PAD_TEMPLATE(
  84         "sink",
  85         GST_PAD_SINK,
  86         GST_PAD_ALWAYS,
  87         GST_STATIC_CAPS(gst_vaapidecode_sink_caps_str));
  88
  89 static GstStaticPadTemplate gst_vaapidecode_src_factory =
  90     GST_STATIC_PAD_TEMPLATE(
  91         "src",
  92         GST_PAD_SRC,
  93         GST_PAD_ALWAYS,
  94         GST_STATIC_CAPS(gst_vaapidecode_src_caps_str));
  95
  96 /* GstImplementsInterface interface */
  97 #if !GST_CHECK_VERSION(1,0,0)
  98 static gboolean
  99 gst_vaapidecode_implements_interface_supported(
 100     GstImplementsInterface *iface,
 101     GType                   type
 102 )
 103 {
 104     return (type == GST_TYPE_VIDEO_CONTEXT);
 105 }
 106
 107 static void
 108 gst_vaapidecode_implements_iface_init(GstImplementsInterfaceClass *iface)
 109 {
 110     iface->supported = gst_vaapidecode_implements_interface_supported;
 111 }
 112 #endif
 113
 114 /* GstVideoContext interface */
 115 #if !GST_CHECK_VERSION(1,1,0)
 116 static void
 117 gst_vaapidecode_set_video_context(GstVideoContext *context, const gchar *type,
 118     const GValue *value)
 119 {
 120     GstVaapiDecode *decode = GST_VAAPIDECODE (context);
 121     gst_vaapi_set_display (type, value, &decode->display);
 122 }
 123
 124 static void
 125 gst_video_context_interface_init(GstVideoContextInterface *iface)
 126 {
 127     iface->set_context = gst_vaapidecode_set_video_context;
 128 }
 129
 130 #define GstVideoContextClass GstVideoContextInterface
 131 #endif
 132
 133 G_DEFINE_TYPE_WITH_CODE(
 134     GstVaapiDecode,
 135     gst_vaapidecode,
 136     GST_TYPE_VIDEO_DECODER,
 137 #if !GST_CHECK_VERSION(1,0,0)
 138     G_IMPLEMENT_INTERFACE(GST_TYPE_IMPLEMENTS_INTERFACE,
 139                           gst_vaapidecode_implements_iface_init);
 140 #endif
 141 #if !GST_CHECK_VERSION(1,1,0)
 142     G_IMPLEMENT_INTERFACE(GST_TYPE_VIDEO_CONTEXT,
 143                           gst_video_context_interface_init)
 144 #endif
 145     )
 146
 147 static gboolean
 148 gst_vaapidecode_update_src_caps(GstVaapiDecode *decode,
 149     const GstVideoCodecState *ref_state);
 150
 151 static void
 152 gst_vaapi_decoder_state_changed(GstVaapiDecoder *decoder,
 153     const GstVideoCodecState *codec_state, gpointer user_data)
 154 {
 155     GstVaapiDecode * const decode = GST_VAAPIDECODE(user_data);
 156
 157     g_assert(decode->decoder == decoder);
 158
 159     gst_vaapidecode_update_src_caps(decode, codec_state);
 160 }
 161
 162 static inline gboolean
 163 gst_vaapidecode_update_sink_caps(GstVaapiDecode *decode, GstCaps *caps)
 164 {
 165     gst_caps_replace(&decode->sinkpad_caps, caps);
 166     return TRUE;
 167 }
 168
 169 static gboolean
 170 gst_vaapidecode_update_src_caps(GstVaapiDecode *decode,
 171     const GstVideoCodecState *ref_state)
 172 {
 173     GstVideoDecoder * const vdec = GST_VIDEO_DECODER(decode);
 174     GstVideoCodecState *state;
 175     GstVideoInfo *vi, vis;
 176
 177     state = gst_video_decoder_set_output_state(vdec,
 178         GST_VIDEO_INFO_FORMAT(&ref_state->info),
 179         ref_state->info.width, ref_state->info.height,
 180         (GstVideoCodecState *)ref_state);
 181     if (!state)
 182         return FALSE;
 183
 184     vi = &state->info;
 185     if (GST_VIDEO_INFO_FORMAT(vi) == GST_VIDEO_FORMAT_ENCODED) {
 186         gst_video_info_init(&vis);
 187         gst_video_info_set_format(&vis, GST_VIDEO_FORMAT_NV12,
 188             GST_VIDEO_INFO_WIDTH(vi), GST_VIDEO_INFO_HEIGHT(vi));
 189         vi->size = vis.size;
 190     }
 191     gst_video_codec_state_unref(state);
 192
 193 #if GST_CHECK_VERSION(1,1,0)
 194     state->caps = gst_video_info_to_caps(&vis);
 195 #else
 196     /* XXX: gst_video_info_to_caps() from GStreamer 0.10 does not
 197        reconstruct suitable caps for "encoded" video formats */
 198     state->caps = gst_caps_from_string(GST_VAAPI_SURFACE_CAPS_NAME);
 199     if (!state->caps)
 200         return FALSE;
 201
 202     gst_caps_set_simple(state->caps,
 203         "type", G_TYPE_STRING, "vaapi",
 204         "opengl", G_TYPE_BOOLEAN, USE_GLX,
 205         "width", G_TYPE_INT, vi->width,
 206         "height", G_TYPE_INT, vi->height,
 207         "framerate", GST_TYPE_FRACTION, vi->fps_n, vi->fps_d,
 208         "pixel-aspect-ratio", GST_TYPE_FRACTION, vi->par_n, vi->par_d,
 209         NULL);
 210
 211     gst_caps_set_interlaced(state->caps, vi);
 212 #endif
 213     gst_caps_replace(&decode->srcpad_caps, state->caps);
 214     return TRUE;
 215 }
 216
 217 static void
 218 gst_vaapidecode_release(GstVaapiDecode *decode)
 219 {
 220     g_mutex_lock(&decode->decoder_mutex);
 221     g_cond_signal(&decode->decoder_ready);
 222     g_mutex_unlock(&decode->decoder_mutex);
 223 }
 224
 225 static GstFlowReturn
 226 gst_vaapidecode_decode_frame(GstVideoDecoder *vdec, GstVideoCodecFrame *frame)
 227 {
 228     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 229     GstVaapiDecoderStatus status;
 230     GstFlowReturn ret;
 231     gint64 end_time;
 232
 233     if (decode->render_time_base)
 234         end_time = decode->render_time_base;
 235     else
 236         end_time = g_get_monotonic_time();
 237     end_time += GST_TIME_AS_USECONDS(decode->last_buffer_time);
 238     end_time += G_TIME_SPAN_SECOND;
 239
 240     /* Decode current frame */
 241     for (;;) {
 242         status = gst_vaapi_decoder_decode(decode->decoder, frame);
 243         if (status == GST_VAAPI_DECODER_STATUS_ERROR_NO_SURFACE) {
 244             gboolean was_signalled;
 245             GST_VIDEO_DECODER_STREAM_UNLOCK(vdec);
 246             g_mutex_lock(&decode->decoder_mutex);
 247             was_signalled = g_cond_wait_until(
 248                 &decode->decoder_ready,
 249                 &decode->decoder_mutex,
 250                 end_time
 251             );
 252             g_mutex_unlock(&decode->decoder_mutex);
 253             GST_VIDEO_DECODER_STREAM_LOCK(vdec);
 254             if (was_signalled)
 255                 continue;
 256             goto error_decode_timeout;
 257         }
 258         if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
 259             goto error_decode;
 260         break;
 261     }
 262     return GST_FLOW_OK;
 263
 264     /* ERRORS */
 265 error_decode_timeout:
 266     {
 267         GST_WARNING("decode timeout. Decoder required a VA surface but none "
 268                     "got available within one second");
 269         return GST_FLOW_EOS;
 270     }
 271 error_decode:
 272     {
 273         GST_ERROR("decode error %d", status);
 274         switch (status) {
 275         case GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CODEC:
 276         case GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_PROFILE:
 277         case GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CHROMA_FORMAT:
 278             ret = GST_FLOW_NOT_SUPPORTED;
 279             break;
 280         default:
 281             ret = GST_FLOW_EOS;
 282             break;
 283         }
 284         gst_video_decoder_drop_frame(vdec, frame);
 285         return ret;
 286     }
 287 }
 288
 289 static GstFlowReturn
 290 gst_vaapidecode_push_decoded_frame(GstVideoDecoder *vdec)
 291 {
 292     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 293     GstVaapiSurfaceProxy *proxy;
 294     GstVaapiDecoderStatus status;
 295     GstVideoCodecFrame *out_frame;
 296     GstFlowReturn ret;
 297 #if GST_CHECK_VERSION(1,0,0)
 298     const GstVaapiRectangle *crop_rect;
 299     GstVaapiVideoMeta *meta;
 300     guint flags;
 301 #endif
 302
 303     status = gst_vaapi_decoder_get_frame_with_timeout(decode->decoder,
 304         &out_frame, 100000);
 305     if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
 306         return GST_VIDEO_DECODER_FLOW_NEED_DATA;
 307
 308     if (!GST_VIDEO_CODEC_FRAME_IS_DECODE_ONLY(out_frame)) {
 309         proxy = gst_video_codec_frame_get_user_data(out_frame);
 310
 311         gst_vaapi_surface_proxy_set_destroy_notify(proxy,
 312             (GDestroyNotify)gst_vaapidecode_release, decode);
 313
 314 #if GST_CHECK_VERSION(1,0,0)
 315         ret = gst_video_decoder_allocate_output_frame(vdec, out_frame);
 316         if (ret != GST_FLOW_OK)
 317             goto error_create_buffer;
 318
 319         meta = gst_buffer_get_vaapi_video_meta(out_frame->output_buffer);
 320         if (!meta)
 321             goto error_get_meta;
 322         gst_vaapi_video_meta_set_surface_proxy(meta, proxy);
 323
 324         flags = gst_vaapi_surface_proxy_get_flags(proxy);
 325         if (flags & GST_VAAPI_SURFACE_PROXY_FLAG_INTERLACED) {
 326             guint out_flags = GST_VIDEO_BUFFER_FLAG_INTERLACED;
 327             if (flags & GST_VAAPI_SURFACE_PROXY_FLAG_TFF)
 328                 out_flags |= GST_VIDEO_BUFFER_FLAG_TFF;
 329             if (flags & GST_VAAPI_SURFACE_PROXY_FLAG_RFF)
 330                 out_flags |= GST_VIDEO_BUFFER_FLAG_RFF;
 331             if (flags & GST_VAAPI_SURFACE_PROXY_FLAG_ONEFIELD)
 332                 out_flags |= GST_VIDEO_BUFFER_FLAG_ONEFIELD;
 333             GST_BUFFER_FLAG_SET(out_frame->output_buffer, out_flags);
 334         }
 335
 336         crop_rect = gst_vaapi_surface_proxy_get_crop_rect(proxy);
 337         if (crop_rect) {
 338             GstVideoCropMeta * const crop_meta =
 339                 gst_buffer_add_video_crop_meta(out_frame->output_buffer);
 340             if (crop_meta) {
 341                 crop_meta->x = crop_rect->x;
 342                 crop_meta->y = crop_rect->y;
 343                 crop_meta->width = crop_rect->width;
 344                 crop_meta->height = crop_rect->height;
 345             }
 346         }
 347
 348 #if GST_CHECK_VERSION(1,1,0)
 349         if (decode->has_texture_upload_meta)
 350             gst_buffer_add_texture_upload_meta(out_frame->output_buffer);
 351 #endif
 352 #else
 353         out_frame->output_buffer =
 354             gst_vaapi_video_buffer_new_with_surface_proxy(proxy);
 355         if (!out_frame->output_buffer)
 356             goto error_create_buffer;
 357 #endif
 358     }
 359
 360     ret = gst_video_decoder_finish_frame(vdec, out_frame);
 361     if (ret != GST_FLOW_OK)
 362         goto error_commit_buffer;
 363
 364     /* Estimate when this frame would no longer be needed for rendering */
 365     if (GST_CLOCK_TIME_IS_VALID(out_frame->pts)) {
 366         if (!decode->render_time_base)
 367             decode->render_time_base = g_get_monotonic_time() -
 368                 GST_TIME_AS_USECONDS(out_frame->pts);
 369         decode->last_buffer_time = out_frame->pts;
 370         if (GST_CLOCK_TIME_IS_VALID(out_frame->duration))
 371             decode->last_buffer_time += out_frame->duration;
 372         else
 373             decode->last_buffer_time += GST_SECOND;
 374     }
 375     else {
 376         decode->render_time_base = 0;
 377         decode->last_buffer_time = 0;
 378     }
 379
 380     gst_video_codec_frame_unref(out_frame);
 381     return GST_FLOW_OK;
 382
 383     /* ERRORS */
 384 error_create_buffer:
 385     {
 386         const GstVaapiID surface_id =
 387             gst_vaapi_surface_get_id(GST_VAAPI_SURFACE_PROXY_SURFACE(proxy));
 388
 389         GST_ERROR("video sink failed to create video buffer for proxy'ed "
 390                   "surface %" GST_VAAPI_ID_FORMAT,
 391                   GST_VAAPI_ID_ARGS(surface_id));
 392         gst_video_decoder_drop_frame(vdec, out_frame);
 393         gst_video_codec_frame_unref(out_frame);
 394         return GST_FLOW_EOS;
 395     }
 396 #if GST_CHECK_VERSION(1,0,0)
 397 error_get_meta:
 398     {
 399         GST_ERROR("failed to get vaapi video meta attached to video buffer");
 400         gst_video_decoder_drop_frame(vdec, out_frame);
 401         gst_video_codec_frame_unref(out_frame);
 402         return GST_FLOW_EOS;
 403     }
 404 #endif
 405 error_commit_buffer:
 406     {
 407         if (ret != GST_FLOW_FLUSHING)
 408             GST_ERROR("video sink rejected the video buffer (error %d)", ret);
 409         gst_video_codec_frame_unref(out_frame);
 410         return GST_FLOW_EOS;
 411     }
 412 }
 413
 414 static GstFlowReturn
 415 gst_vaapidecode_handle_frame(GstVideoDecoder *vdec, GstVideoCodecFrame *frame)
 416 {
 417     GstFlowReturn ret;
 418
 419     /* Make sure to release the base class stream lock so that decode
 420        loop can call gst_video_decoder_finish_frame() without blocking */
 421     GST_VIDEO_DECODER_STREAM_UNLOCK(vdec);
 422     ret = gst_vaapidecode_decode_frame(vdec, frame);
 423     GST_VIDEO_DECODER_STREAM_LOCK(vdec);
 424     return ret;
 425 }
 426
 427 static void
 428 gst_vaapidecode_decode_loop(GstVaapiDecode *decode)
 429 {
 430     GstVideoDecoder * const vdec = GST_VIDEO_DECODER(decode);
 431     GstFlowReturn ret;
 432
 433     ret = gst_vaapidecode_push_decoded_frame(vdec);
 434     if (ret == GST_FLOW_OK)
 435         return;
 436
 437     /* If invoked from gst_vaapidecode_finish(), then return right
 438        away no matter the errors, or the GstVaapiDecoder needs further
 439        data to complete decoding (there no more data to feed in) */
 440     if (decode->decoder_finish) {
 441         g_mutex_lock(&decode->decoder_mutex);
 442         g_cond_signal(&decode->decoder_finish_done);
 443         g_mutex_unlock(&decode->decoder_mutex);
 444         return;
 445     }
 446
 447     /* Suspend the task if an error occurred */
 448     if (ret != GST_VIDEO_DECODER_FLOW_NEED_DATA)
 449         gst_pad_pause_task(decode->srcpad);
 450 }
 451
 452 static GstFlowReturn
 453 gst_vaapidecode_finish(GstVideoDecoder *vdec)
 454 {
 455     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 456     GstVaapiDecoderStatus status;
 457
 458     /* If there is something in GstVideoDecoder's output adapter, then
 459        submit the frame for decoding */
 460     if (decode->current_frame_size)
 461         gst_video_decoder_have_frame(vdec);
 462
 463     status = gst_vaapi_decoder_flush(decode->decoder);
 464     if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
 465         goto error_flush;
 466
 467     /* Make sure the decode loop function has a chance to return, thus
 468        possibly unlocking gst_video_decoder_finish_frame() */
 469     GST_VIDEO_DECODER_STREAM_UNLOCK(vdec);
 470     g_mutex_lock(&decode->decoder_mutex);
 471     decode->decoder_finish = TRUE;
 472     g_cond_wait(&decode->decoder_finish_done, &decode->decoder_mutex);
 473     g_mutex_unlock(&decode->decoder_mutex);
 474     gst_pad_stop_task(decode->srcpad);
 475     GST_VIDEO_DECODER_STREAM_LOCK(vdec);
 476     return GST_FLOW_OK;
 477
 478     /* ERRORS */
 479 error_flush:
 480     {
 481         GST_ERROR("failed to flush decoder (status %d)", status);
 482         return GST_FLOW_EOS;
 483     }
 484 }
 485
 486 #if GST_CHECK_VERSION(1,0,0)
 487 static gboolean
 488 gst_vaapidecode_decide_allocation(GstVideoDecoder *vdec, GstQuery *query)
 489 {
 490     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 491     GstCaps *caps = NULL;
 492     GstBufferPool *pool;
 493     GstStructure *config;
 494     GstVideoInfo vi;
 495     guint size, min, max;
 496     gboolean need_pool, update_pool;
 497
 498     gst_query_parse_allocation(query, &caps, &need_pool);
 499
 500     if (!caps)
 501         goto error_no_caps;
 502
 503     gst_video_info_init(&vi);
 504     gst_video_info_from_caps(&vi, caps);
 505     if (GST_VIDEO_INFO_FORMAT(&vi) == GST_VIDEO_FORMAT_ENCODED)
 506         gst_video_info_set_format(&vi, GST_VIDEO_FORMAT_NV12,
 507             GST_VIDEO_INFO_WIDTH(&vi), GST_VIDEO_INFO_HEIGHT(&vi));
 508
 509     g_return_val_if_fail(decode->display != NULL, FALSE);
 510
 511     if (gst_query_get_n_allocation_pools(query) > 0) {
 512         gst_query_parse_nth_allocation_pool(query, 0, &pool, &size, &min, &max);
 513         size = MAX(size, vi.size);
 514         update_pool = TRUE;
 515     }
 516     else {
 517         pool = NULL;
 518         size = vi.size;
 519         min = max = 0;
 520         update_pool = FALSE;
 521     }
 522
 523     if (!pool || !gst_buffer_pool_has_option(pool,
 524             GST_BUFFER_POOL_OPTION_VAAPI_VIDEO_META)) {
 525         GST_INFO("no pool or doesn't support GstVaapiVideoMeta, "
 526             "making new pool");
 527         pool = gst_vaapi_video_buffer_pool_new(decode->display);
 528         if (!pool)
 529             goto error_create_pool;
 530
 531         config = gst_buffer_pool_get_config(pool);
 532         gst_buffer_pool_config_set_params(config, caps, size, min, max);
 533         gst_buffer_pool_config_add_option(config,
 534             GST_BUFFER_POOL_OPTION_VAAPI_VIDEO_META);
 535         gst_buffer_pool_set_config(pool, config);
 536     }
 537
 538     decode->has_texture_upload_meta = FALSE;
 539     if (gst_query_find_allocation_meta(query, GST_VIDEO_META_API_TYPE, NULL)) {
 540         config = gst_buffer_pool_get_config(pool);
 541         gst_buffer_pool_config_add_option(config,
 542             GST_BUFFER_POOL_OPTION_VIDEO_META);
 543         gst_buffer_pool_set_config(pool, config);
 544 #if GST_CHECK_VERSION(1,1,0)
 545         decode->has_texture_upload_meta = gst_query_find_allocation_meta(query,
 546             GST_VIDEO_GL_TEXTURE_UPLOAD_META_API_TYPE, NULL);
 547 #endif
 548     }
 549
 550     if (update_pool)
 551         gst_query_set_nth_allocation_pool(query, 0, pool, size, min, max);
 552     else
 553         gst_query_add_allocation_pool(query, pool, size, min, max);
 554     if (pool)
 555         gst_object_unref(pool);
 556     return TRUE;
 557
 558     /* ERRORS */
 559 error_no_caps:
 560     {
 561         GST_ERROR("no caps specified");
 562         return FALSE;
 563     }
 564 error_create_pool:
 565     {
 566         GST_ERROR("failed to create buffer pool");
 567         return FALSE;
 568     }
 569 }
 570 #endif
 571
 572 #if GST_CHECK_VERSION(1,1,0)
 573 static void
 574 gst_vaapidecode_set_context(GstElement *element, GstContext *context)
 575 {
 576     GstVaapiDecode * const decode = GST_VAAPIDECODE(element);
 577     GstVaapiDisplay *display = NULL;
 578
 579     if (gst_vaapi_video_context_get_display(context, &display)) {
 580         GST_INFO_OBJECT(element, "set display %p", display);
 581         gst_vaapi_display_replace(&decode->display, display);
 582     }
 583 }
 584 #endif
 585
 586 static inline gboolean
 587 gst_vaapidecode_ensure_display(GstVaapiDecode *decode)
 588 {
 589     return gst_vaapi_ensure_display(decode, GST_VAAPI_DISPLAY_TYPE_ANY,
 590         &decode->display);
 591 }
 592
 593 static inline guint
 594 gst_vaapi_codec_from_caps(GstCaps *caps)
 595 {
 596     return gst_vaapi_profile_get_codec(gst_vaapi_profile_from_caps(caps));
 597 }
 598
 599 static gboolean
 600 gst_vaapidecode_create(GstVaapiDecode *decode, GstCaps *caps)
 601 {
 602     GstVaapiDisplay *dpy;
 603
 604     if (!gst_vaapidecode_ensure_display(decode))
 605         return FALSE;
 606     dpy = decode->display;
 607
 608     switch (gst_vaapi_codec_from_caps(caps)) {
 609     case GST_VAAPI_CODEC_MPEG2:
 610         decode->decoder = gst_vaapi_decoder_mpeg2_new(dpy, caps);
 611         break;
 612     case GST_VAAPI_CODEC_MPEG4:
 613     case GST_VAAPI_CODEC_H263:
 614         decode->decoder = gst_vaapi_decoder_mpeg4_new(dpy, caps);
 615         break;
 616     case GST_VAAPI_CODEC_H264:
 617         decode->decoder = gst_vaapi_decoder_h264_new(dpy, caps);
 618         break;
 619     case GST_VAAPI_CODEC_WMV3:
 620     case GST_VAAPI_CODEC_VC1:
 621         decode->decoder = gst_vaapi_decoder_vc1_new(dpy, caps);
 622         break;
 623 #if USE_JPEG_DECODER
 624     case GST_VAAPI_CODEC_JPEG:
 625         decode->decoder = gst_vaapi_decoder_jpeg_new(dpy, caps);
 626         break;
 627 #endif
 628     default:
 629         decode->decoder = NULL;
 630         break;
 631     }
 632     if (!decode->decoder)
 633         return FALSE;
 634
 635     gst_vaapi_decoder_set_codec_state_changed_func(decode->decoder,
 636         gst_vaapi_decoder_state_changed, decode);
 637
 638     decode->decoder_caps = gst_caps_ref(caps);
 639     return gst_pad_start_task(decode->srcpad,
 640         (GstTaskFunction)gst_vaapidecode_decode_loop, decode, NULL);
 641 }
 642
 643 static void
 644 gst_vaapidecode_destroy(GstVaapiDecode *decode)
 645 {
 646     gst_pad_stop_task(decode->srcpad);
 647     gst_vaapi_decoder_replace(&decode->decoder, NULL);
 648     gst_caps_replace(&decode->decoder_caps, NULL);
 649     gst_vaapidecode_release(decode);
 650 }
 651
 652 static gboolean
 653 gst_vaapidecode_reset_full(GstVaapiDecode *decode, GstCaps *caps, gboolean hard)
 654 {
 655     GstVaapiCodec codec;
 656
 657     decode->has_texture_upload_meta = FALSE;
 658
 659     /* Reset timers if hard reset was requested (e.g. seek) */
 660     if (hard) {
 661         decode->render_time_base = 0;
 662         decode->last_buffer_time = 0;
 663     }
 664
 665     /* Only reset decoder if codec type changed */
 666     else if (decode->decoder && decode->decoder_caps) {
 667         if (gst_caps_is_always_compatible(caps, decode->decoder_caps))
 668             return TRUE;
 669         codec = gst_vaapi_codec_from_caps(caps);
 670         if (codec == gst_vaapi_decoder_get_codec(decode->decoder))
 671             return TRUE;
 672     }
 673
 674     /* Reset tracked frame size */
 675     decode->current_frame_size = 0;
 676
 677     gst_vaapidecode_destroy(decode);
 678     return gst_vaapidecode_create(decode, caps);
 679 }
 680
 681 static void
 682 gst_vaapidecode_finalize(GObject *object)
 683 {
 684     GstVaapiDecode * const decode = GST_VAAPIDECODE(object);
 685
 686     gst_caps_replace(&decode->sinkpad_caps, NULL);
 687     gst_caps_replace(&decode->srcpad_caps,  NULL);
 688     gst_caps_replace(&decode->allowed_caps, NULL);
 689
 690     gst_vaapi_display_replace(&decode->display, NULL);
 691
 692     g_cond_clear(&decode->decoder_finish_done);
 693     g_cond_clear(&decode->decoder_ready);
 694     g_mutex_clear(&decode->decoder_mutex);
 695
 696     G_OBJECT_CLASS(gst_vaapidecode_parent_class)->finalize(object);
 697 }
 698
 699 static gboolean
 700 gst_vaapidecode_open(GstVideoDecoder *vdec)
 701 {
 702     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 703     GstVaapiDisplay * const old_display = decode->display;
 704     gboolean success;
 705
 706     /* Let GstVideoContext ask for a proper display to its neighbours */
 707     /* Note: steal old display that may be allocated from get_caps()
 708        so that to retain a reference to it, thus avoiding extra
 709        initialization steps if we turn out to simply re-use the
 710        existing (cached) VA display */
 711     decode->display = NULL;
 712     success = gst_vaapidecode_ensure_display(decode);
 713     if (old_display)
 714         gst_vaapi_display_unref(old_display);
 715     return success;
 716 }
 717
 718 static gboolean
 719 gst_vaapidecode_close(GstVideoDecoder *vdec)
 720 {
 721     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 722
 723     gst_vaapidecode_destroy(decode);
 724     gst_vaapi_display_replace(&decode->display, NULL);
 725     return TRUE;
 726 }
 727
 728 static gboolean
 729 gst_vaapidecode_reset(GstVideoDecoder *vdec, gboolean hard)
 730 {
 731     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 732
 733     return gst_vaapidecode_reset_full(decode, decode->sinkpad_caps, hard);
 734 }
 735
 736 static gboolean
 737 gst_vaapidecode_set_format(GstVideoDecoder *vdec, GstVideoCodecState *state)
 738 {
 739     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 740
 741     if (!gst_vaapidecode_update_sink_caps(decode, state->caps))
 742         return FALSE;
 743     if (!gst_vaapidecode_update_src_caps(decode, state))
 744         return FALSE;
 745     if (!gst_vaapidecode_reset_full(decode, decode->sinkpad_caps, FALSE))
 746         return FALSE;
 747     return TRUE;
 748 }
 749
 750 static GstFlowReturn
 751 gst_vaapidecode_parse(GstVideoDecoder *vdec,
 752     GstVideoCodecFrame *frame, GstAdapter *adapter, gboolean at_eos)
 753 {
 754     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 755     GstVaapiDecoderStatus status;
 756     GstFlowReturn ret;
 757     guint got_unit_size;
 758     gboolean got_frame;
 759
 760     status = gst_vaapi_decoder_parse(decode->decoder, frame,
 761         adapter, at_eos, &got_unit_size, &got_frame);
 762
 763     switch (status) {
 764     case GST_VAAPI_DECODER_STATUS_SUCCESS:
 765         if (got_unit_size > 0) {
 766             gst_video_decoder_add_to_frame(vdec, got_unit_size);
 767             decode->current_frame_size += got_unit_size;
 768         }
 769         if (got_frame) {
 770             ret = gst_video_decoder_have_frame(vdec);
 771             decode->current_frame_size = 0;
 772         }
 773         else
 774             ret = GST_FLOW_OK;
 775         break;
 776     case GST_VAAPI_DECODER_STATUS_ERROR_NO_DATA:
 777         ret = GST_VIDEO_DECODER_FLOW_NEED_DATA;
 778         break;
 779     case GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CODEC:
 780     case GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_PROFILE:
 781     case GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CHROMA_FORMAT:
 782         GST_WARNING("parse error %d", status);
 783         ret = GST_FLOW_NOT_SUPPORTED;
 784         decode->current_frame_size = 0;
 785         break;
 786     default:
 787         GST_ERROR("parse error %d", status);
 788         ret = GST_FLOW_EOS;
 789         decode->current_frame_size = 0;
 790         break;
 791     }
 792     return ret;
 793 }
 794
 795 static void
 796 gst_vaapidecode_class_init(GstVaapiDecodeClass *klass)
 797 {
 798     GObjectClass * const object_class = G_OBJECT_CLASS(klass);
 799     GstElementClass * const element_class = GST_ELEMENT_CLASS(klass);
 800     GstVideoDecoderClass * const vdec_class = GST_VIDEO_DECODER_CLASS(klass);
 801     GstPadTemplate *pad_template;
 802
 803     GST_DEBUG_CATEGORY_INIT(gst_debug_vaapidecode,
 804                             GST_PLUGIN_NAME, 0, GST_PLUGIN_DESC);
 805
 806     object_class->finalize   = gst_vaapidecode_finalize;
 807
 808     vdec_class->open         = GST_DEBUG_FUNCPTR(gst_vaapidecode_open);
 809     vdec_class->close        = GST_DEBUG_FUNCPTR(gst_vaapidecode_close);
 810     vdec_class->set_format   = GST_DEBUG_FUNCPTR(gst_vaapidecode_set_format);
 811     vdec_class->reset        = GST_DEBUG_FUNCPTR(gst_vaapidecode_reset);
 812     vdec_class->parse        = GST_DEBUG_FUNCPTR(gst_vaapidecode_parse);
 813     vdec_class->handle_frame = GST_DEBUG_FUNCPTR(gst_vaapidecode_handle_frame);
 814     vdec_class->finish       = GST_DEBUG_FUNCPTR(gst_vaapidecode_finish);
 815
 816 #if GST_CHECK_VERSION(1,0,0)
 817     vdec_class->decide_allocation =
 818         GST_DEBUG_FUNCPTR(gst_vaapidecode_decide_allocation);
 819 #endif
 820
 821 #if GST_CHECK_VERSION(1,1,0)
 822     element_class->set_context = GST_DEBUG_FUNCPTR(gst_vaapidecode_set_context);
 823 #endif
 824
 825     gst_element_class_set_static_metadata(element_class,
 826         "VA-API decoder",
 827         "Codec/Decoder/Video",
 828         GST_PLUGIN_DESC,
 829         "Gwenole Beauchesne <gwenole.beauchesne@intel.com>");
 830
 831     /* sink pad */
 832     pad_template = gst_static_pad_template_get(&gst_vaapidecode_sink_factory);
 833     gst_element_class_add_pad_template(element_class, pad_template);
 834
 835     /* src pad */
 836     pad_template = gst_static_pad_template_get(&gst_vaapidecode_src_factory);
 837     gst_element_class_add_pad_template(element_class, pad_template);
 838 }
 839
 840 static gboolean
 841 gst_vaapidecode_ensure_allowed_caps(GstVaapiDecode *decode)
 842 {
 843     GstCaps *decode_caps;
 844     guint i, n_decode_caps;
 845
 846     if (decode->allowed_caps)
 847         return TRUE;
 848
 849     if (!gst_vaapidecode_ensure_display(decode))
 850         goto error_no_display;
 851
 852     decode_caps = gst_vaapi_display_get_decode_caps(decode->display);
 853     if (!decode_caps)
 854         goto error_no_decode_caps;
 855     n_decode_caps = gst_caps_get_size(decode_caps);
 856
 857     decode->allowed_caps = gst_caps_new_empty();
 858     if (!decode->allowed_caps)
 859         goto error_no_memory;
 860
 861     for (i = 0; i < n_decode_caps; i++) {
 862         GstStructure *structure;
 863         structure = gst_caps_get_structure(decode_caps, i);
 864         if (!structure)
 865             continue;
 866         structure = gst_structure_copy(structure);
 867         if (!structure)
 868             continue;
 869         gst_structure_remove_field(structure, "profile");
 870         decode->allowed_caps =
 871             gst_caps_merge_structure(decode->allowed_caps, structure);
 872     }
 873
 874     gst_caps_unref(decode_caps);
 875     return TRUE;
 876
 877     /* ERRORS */
 878 error_no_display:
 879     {
 880         GST_ERROR("failed to retrieve VA display");
 881         return FALSE;
 882     }
 883 error_no_decode_caps:
 884     {
 885         GST_ERROR("failed to retrieve VA decode caps");
 886         return FALSE;
 887     }
 888 error_no_memory:
 889     {
 890         GST_ERROR("failed to allocate allowed-caps set");
 891         gst_caps_unref(decode_caps);
 892         return FALSE;
 893     }
 894 }
 895
 896 static GstCaps *
 897 gst_vaapidecode_get_caps(GstPad *pad)
 898 {
 899     GstVaapiDecode * const decode = GST_VAAPIDECODE(GST_OBJECT_PARENT(pad));
 900
 901     if (!gst_vaapidecode_ensure_allowed_caps(decode))
 902         return gst_caps_new_empty();
 903
 904     return gst_caps_ref(decode->allowed_caps);
 905 }
 906
 907 static gboolean
 908 gst_vaapidecode_query(GST_PAD_QUERY_FUNCTION_ARGS)
 909 {
 910     GstVaapiDecode * const decode =
 911         GST_VAAPIDECODE(gst_pad_get_parent_element(pad));
 912     gboolean res;
 913
 914     GST_INFO_OBJECT(decode, "query type %s", GST_QUERY_TYPE_NAME(query));
 915
 916     if (gst_vaapi_reply_to_query(query, decode->display)) {
 917         GST_DEBUG("sharing display %p", decode->display);
 918         res = TRUE;
 919     }
 920     else if (GST_PAD_IS_SINK(pad)) {
 921         switch (GST_QUERY_TYPE(query)) {
 922 #if GST_CHECK_VERSION(1,0,0)
 923         case GST_QUERY_CAPS: {
 924             GstCaps * const caps = gst_vaapidecode_get_caps(pad);
 925             gst_query_set_caps_result(query, caps);
 926             gst_caps_unref(caps);
 927             res = TRUE;
 928             break;
 929         }
 930 #endif
 931         default:
 932             res = GST_PAD_QUERY_FUNCTION_CALL(decode->sinkpad_query,
 933                 decode->sinkpad, parent, query);
 934             break;
 935         }
 936     }
 937     else
 938         res = GST_PAD_QUERY_FUNCTION_CALL(decode->srcpad_query,
 939             decode->srcpad, parent, query);
 940
 941     gst_object_unref(decode);
 942     return res;
 943 }
 944
 945 static void
 946 gst_vaapidecode_init(GstVaapiDecode *decode)
 947 {
 948     GstVideoDecoder * const vdec = GST_VIDEO_DECODER(decode);
 949
 950     decode->display             = NULL;
 951     decode->decoder             = NULL;
 952     decode->decoder_caps        = NULL;
 953     decode->allowed_caps        = NULL;
 954     decode->render_time_base    = 0;
 955     decode->last_buffer_time    = 0;
 956
 957     g_mutex_init(&decode->decoder_mutex);
 958     g_cond_init(&decode->decoder_ready);
 959     g_cond_init(&decode->decoder_finish_done);
 960
 961     gst_video_decoder_set_packetized(vdec, FALSE);
 962
 963     /* Pad through which data comes in to the element */
 964     decode->sinkpad = GST_VIDEO_DECODER_SINK_PAD(vdec);
 965     decode->sinkpad_query = GST_PAD_QUERYFUNC(decode->sinkpad);
 966     gst_pad_set_query_function(decode->sinkpad, gst_vaapidecode_query);
 967 #if !GST_CHECK_VERSION(1,0,0)
 968     gst_pad_set_getcaps_function(decode->sinkpad, gst_vaapidecode_get_caps);
 969 #endif
 970
 971     /* Pad through which data goes out of the element */
 972     decode->srcpad = GST_VIDEO_DECODER_SRC_PAD(vdec);
 973     decode->srcpad_query = GST_PAD_QUERYFUNC(decode->srcpad);
 974     gst_pad_set_query_function(decode->srcpad, gst_vaapidecode_query);
 975 }