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 #include <gst/video/videocontext.h>
  34
  35 #include "gstvaapidecode.h"
  36 #include "gstvaapipluginutil.h"
  37 #include "gstvaapivideobuffer.h"
  38 #if GST_CHECK_VERSION(1,0,0)
  39 #include "gstvaapivideobufferpool.h"
  40 #include "gstvaapivideomemory.h"
  41 #endif
  42
  43 #include <gst/vaapi/gstvaapidecoder_h264.h>
  44 #include <gst/vaapi/gstvaapidecoder_jpeg.h>
  45 #include <gst/vaapi/gstvaapidecoder_mpeg2.h>
  46 #include <gst/vaapi/gstvaapidecoder_mpeg4.h>
  47 #include <gst/vaapi/gstvaapidecoder_vc1.h>
  48
  49 #define GST_PLUGIN_NAME "vaapidecode"
  50 #define GST_PLUGIN_DESC "A VA-API based video decoder"
  51
  52 GST_DEBUG_CATEGORY_STATIC(gst_debug_vaapidecode);
  53 #define GST_CAT_DEFAULT gst_debug_vaapidecode
  54
  55 /* Default templates */
  56 #define GST_CAPS_CODEC(CODEC) CODEC "; "
  57
  58 static const char gst_vaapidecode_sink_caps_str[] =
  59     GST_CAPS_CODEC("video/mpeg, mpegversion=2, systemstream=(boolean)false")
  60     GST_CAPS_CODEC("video/mpeg, mpegversion=4")
  61     GST_CAPS_CODEC("video/x-divx")
  62     GST_CAPS_CODEC("video/x-xvid")
  63     GST_CAPS_CODEC("video/x-h263")
  64     GST_CAPS_CODEC("video/x-h264")
  65     GST_CAPS_CODEC("video/x-wmv")
  66     GST_CAPS_CODEC("image/jpeg")
  67     ;
  68
  69 static const char gst_vaapidecode_src_caps_str[] =
  70     GST_VAAPI_SURFACE_CAPS;
  71
  72 static GstStaticPadTemplate gst_vaapidecode_sink_factory =
  73     GST_STATIC_PAD_TEMPLATE(
  74         "sink",
  75         GST_PAD_SINK,
  76         GST_PAD_ALWAYS,
  77         GST_STATIC_CAPS(gst_vaapidecode_sink_caps_str));
  78
  79 static GstStaticPadTemplate gst_vaapidecode_src_factory =
  80     GST_STATIC_PAD_TEMPLATE(
  81         "src",
  82         GST_PAD_SRC,
  83         GST_PAD_ALWAYS,
  84         GST_STATIC_CAPS(gst_vaapidecode_src_caps_str));
  85
  86 /* GstImplementsInterface interface */
  87 #if !GST_CHECK_VERSION(1,0,0)
  88 static gboolean
  89 gst_vaapidecode_implements_interface_supported(
  90     GstImplementsInterface *iface,
  91     GType                   type
  92 )
  93 {
  94     return (type == GST_TYPE_VIDEO_CONTEXT);
  95 }
  96
  97 static void
  98 gst_vaapidecode_implements_iface_init(GstImplementsInterfaceClass *iface)
  99 {
 100     iface->supported = gst_vaapidecode_implements_interface_supported;
 101 }
 102 #endif
 103
 104 /* GstVideoContext interface */
 105 static void
 106 gst_vaapidecode_set_video_context(GstVideoContext *context, const gchar *type,
 107     const GValue *value)
 108 {
 109     GstVaapiDecode *decode = GST_VAAPIDECODE (context);
 110     gst_vaapi_set_display (type, value, &decode->display);
 111 }
 112
 113 static void
 114 gst_video_context_interface_init(GstVideoContextInterface *iface)
 115 {
 116     iface->set_context = gst_vaapidecode_set_video_context;
 117 }
 118
 119 #define GstVideoContextClass GstVideoContextInterface
 120 G_DEFINE_TYPE_WITH_CODE(
 121     GstVaapiDecode,
 122     gst_vaapidecode,
 123     GST_TYPE_VIDEO_DECODER,
 124 #if !GST_CHECK_VERSION(1,0,0)
 125     G_IMPLEMENT_INTERFACE(GST_TYPE_IMPLEMENTS_INTERFACE,
 126                           gst_vaapidecode_implements_iface_init);
 127 #endif
 128     G_IMPLEMENT_INTERFACE(GST_TYPE_VIDEO_CONTEXT,
 129                           gst_video_context_interface_init))
 130
 131 static gboolean
 132 gst_vaapidecode_update_src_caps(GstVaapiDecode *decode,
 133     GstVideoCodecState *ref_state);
 134
 135 static void
 136 gst_vaapi_decoder_notify_caps(GObject *obj, GParamSpec *pspec, void *user_data)
 137 {
 138     GstVaapiDecode * const decode = GST_VAAPIDECODE(user_data);
 139     GstVideoCodecState *codec_state;
 140
 141     g_assert(decode->decoder == GST_VAAPI_DECODER(obj));
 142
 143     codec_state = gst_vaapi_decoder_get_codec_state(decode->decoder);
 144     gst_vaapidecode_update_src_caps(decode, codec_state);
 145     gst_video_codec_state_unref(codec_state);
 146 }
 147
 148 static inline gboolean
 149 gst_vaapidecode_update_sink_caps(GstVaapiDecode *decode, GstCaps *caps)
 150 {
 151     gst_caps_replace(&decode->sinkpad_caps, caps);
 152     return TRUE;
 153 }
 154
 155 static gboolean
 156 gst_vaapidecode_update_src_caps(GstVaapiDecode *decode,
 157     GstVideoCodecState *ref_state)
 158 {
 159     GstVideoDecoder * const vdec = GST_VIDEO_DECODER(decode);
 160     GstVideoCodecState *state;
 161     GstVideoInfo *vi, vis;
 162
 163     state = gst_video_decoder_set_output_state(vdec,
 164         GST_VIDEO_INFO_FORMAT(&ref_state->info),
 165         ref_state->info.width, ref_state->info.height, ref_state);
 166     if (!state)
 167         return FALSE;
 168
 169     vi = &state->info;
 170     if (GST_VIDEO_INFO_FORMAT(vi) == GST_VIDEO_FORMAT_ENCODED) {
 171         gst_video_info_init(&vis);
 172         gst_video_info_set_format(&vis, GST_VIDEO_FORMAT_NV12,
 173             GST_VIDEO_INFO_WIDTH(vi), GST_VIDEO_INFO_HEIGHT(vi));
 174         vi->size = vis.size;
 175     }
 176     gst_video_codec_state_unref(state);
 177
 178     /* XXX: gst_video_info_to_caps() from GStreamer 0.10 does not
 179        reconstruct suitable caps for "encoded" video formats */
 180     state->caps = gst_caps_from_string(GST_VAAPI_SURFACE_CAPS_NAME);
 181     if (!state->caps)
 182         return FALSE;
 183
 184     gst_caps_set_simple(state->caps,
 185         "type", G_TYPE_STRING, "vaapi",
 186         "opengl", G_TYPE_BOOLEAN, USE_GLX,
 187         "width", G_TYPE_INT, vi->width,
 188         "height", G_TYPE_INT, vi->height,
 189         "framerate", GST_TYPE_FRACTION, vi->fps_n, vi->fps_d,
 190         "pixel-aspect-ratio", GST_TYPE_FRACTION, vi->par_n, vi->par_d,
 191         NULL);
 192
 193     if (GST_VIDEO_INFO_IS_INTERLACED(vi))
 194         gst_caps_set_simple(state->caps, "interlaced", G_TYPE_BOOLEAN,
 195             TRUE, NULL);
 196
 197     gst_caps_replace(&decode->srcpad_caps, state->caps);
 198     return TRUE;
 199 }
 200
 201 static void
 202 gst_vaapidecode_release(GstVaapiDecode *decode)
 203 {
 204     g_mutex_lock(&decode->decoder_mutex);
 205     g_cond_signal(&decode->decoder_ready);
 206     g_mutex_unlock(&decode->decoder_mutex);
 207 }
 208
 209 static GstFlowReturn
 210 gst_vaapidecode_decode_frame(GstVideoDecoder *vdec, GstVideoCodecFrame *frame)
 211 {
 212     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 213     GstVaapiDecoderStatus status;
 214     GstFlowReturn ret;
 215     gint64 end_time;
 216
 217     if (!decode->render_time_base)
 218         decode->render_time_base = g_get_monotonic_time();
 219     end_time = decode->render_time_base;
 220     end_time += GST_TIME_AS_USECONDS(decode->last_buffer_time);
 221     end_time += G_TIME_SPAN_SECOND;
 222
 223     /* Decode current frame */
 224     for (;;) {
 225         status = gst_vaapi_decoder_decode(decode->decoder, frame);
 226         if (status == GST_VAAPI_DECODER_STATUS_ERROR_NO_SURFACE) {
 227             gboolean was_signalled;
 228             g_mutex_lock(&decode->decoder_mutex);
 229             was_signalled = g_cond_wait_until(
 230                 &decode->decoder_ready,
 231                 &decode->decoder_mutex,
 232                 end_time
 233             );
 234             g_mutex_unlock(&decode->decoder_mutex);
 235             if (was_signalled)
 236                 continue;
 237             goto error_decode_timeout;
 238         }
 239         if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
 240             goto error_decode;
 241         break;
 242     }
 243     return GST_FLOW_OK;
 244
 245     /* ERRORS */
 246 error_decode_timeout:
 247     {
 248         GST_WARNING("decode timeout. Decoder required a VA surface but none "
 249                     "got available within one second");
 250         return GST_FLOW_EOS;
 251     }
 252 error_decode:
 253     {
 254         GST_ERROR("decode error %d", status);
 255         switch (status) {
 256         case GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CODEC:
 257         case GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_PROFILE:
 258         case GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CHROMA_FORMAT:
 259             ret = GST_FLOW_NOT_SUPPORTED;
 260             break;
 261         default:
 262             ret = GST_FLOW_EOS;
 263             break;
 264         }
 265         gst_video_decoder_drop_frame(vdec, frame);
 266         return ret;
 267     }
 268 }
 269
 270 static GstFlowReturn
 271 gst_vaapidecode_push_decoded_frames(GstVideoDecoder *vdec)
 272 {
 273     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 274     GstVaapiSurfaceProxy *proxy;
 275     GstVaapiDecoderStatus status;
 276     GstVaapiVideoMeta *meta;
 277     GstVideoCodecFrame *out_frame;
 278     GstFlowReturn ret;
 279
 280     /* Output all decoded frames */
 281     for (;;) {
 282         status = gst_vaapi_decoder_get_frame(decode->decoder, &out_frame);
 283         if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
 284             return GST_FLOW_OK;
 285
 286         if (!GST_VIDEO_CODEC_FRAME_IS_DECODE_ONLY(out_frame)) {
 287             proxy = gst_video_codec_frame_get_user_data(out_frame);
 288
 289             gst_vaapi_surface_proxy_set_user_data(proxy,
 290                 decode, (GDestroyNotify)gst_vaapidecode_release);
 291
 292 #if GST_CHECK_VERSION(1,0,0)
 293             ret = gst_video_decoder_allocate_output_frame(vdec, out_frame);
 294             if (ret != GST_FLOW_OK)
 295                 goto error_create_buffer;
 296
 297             meta = gst_buffer_get_vaapi_video_meta(out_frame->output_buffer);
 298             if (!meta)
 299                 goto error_get_meta;
 300             gst_vaapi_video_meta_set_surface_proxy(meta, proxy);
 301 #else
 302             out_frame->output_buffer =
 303                 gst_vaapi_video_buffer_new_with_surface_proxy(proxy);
 304             if (!out_frame->output_buffer)
 305                 goto error_create_buffer;
 306 #endif
 307         }
 308
 309         ret = gst_video_decoder_finish_frame(vdec, out_frame);
 310         if (ret != GST_FLOW_OK)
 311             goto error_commit_buffer;
 312
 313         if (GST_CLOCK_TIME_IS_VALID(out_frame->pts))
 314             decode->last_buffer_time = out_frame->pts;
 315         gst_video_codec_frame_unref(out_frame);
 316     };
 317     return GST_FLOW_OK;
 318
 319     /* ERRORS */
 320 error_create_buffer:
 321     {
 322         const GstVaapiID surface_id =
 323             gst_vaapi_surface_get_id(GST_VAAPI_SURFACE_PROXY_SURFACE(proxy));
 324
 325         GST_ERROR("video sink failed to create video buffer for proxy'ed "
 326                   "surface %" GST_VAAPI_ID_FORMAT,
 327                   GST_VAAPI_ID_ARGS(surface_id));
 328         gst_video_decoder_drop_frame(vdec, out_frame);
 329         gst_video_codec_frame_unref(out_frame);
 330         return GST_FLOW_EOS;
 331     }
 332 #if GST_CHECK_VERSION(1,0,0)
 333 error_get_meta:
 334     {
 335         GST_ERROR("failed to get vaapi video meta attached to video buffer");
 336         gst_video_decoder_drop_frame(vdec, out_frame);
 337         gst_video_codec_frame_unref(out_frame);
 338         return GST_FLOW_EOS;
 339     }
 340 #endif
 341 error_commit_buffer:
 342     {
 343         GST_DEBUG("video sink rejected the video buffer (error %d)", ret);
 344         gst_video_codec_frame_unref(out_frame);
 345         return GST_FLOW_EOS;
 346     }
 347 }
 348
 349 static GstFlowReturn
 350 gst_vaapidecode_handle_frame(GstVideoDecoder *vdec, GstVideoCodecFrame *frame)
 351 {
 352     GstFlowReturn ret;
 353
 354     /* Purge all pending frames we might have already. This helps
 355        release VA surfaces as early as possible for _decode_frame() */
 356     ret = gst_vaapidecode_push_decoded_frames(vdec);
 357     if (ret != GST_FLOW_OK)
 358         return ret;
 359
 360     ret = gst_vaapidecode_decode_frame(vdec, frame);
 361     if (ret != GST_FLOW_OK)
 362         return ret;
 363
 364     /* Purge any pending frame thay may have been decoded already */
 365     return gst_vaapidecode_push_decoded_frames(vdec);
 366 }
 367
 368 static GstFlowReturn
 369 gst_vaapidecode_finish(GstVideoDecoder *vdec)
 370 {
 371     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 372     GstVaapiDecoderStatus status;
 373
 374     status = gst_vaapi_decoder_flush(decode->decoder);
 375     if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
 376         goto error_flush;
 377     return gst_vaapidecode_push_decoded_frames(vdec);
 378
 379     /* ERRORS */
 380 error_flush:
 381     {
 382         GST_ERROR("failed to flush decoder (status %d)", status);
 383         return GST_FLOW_EOS;
 384     }
 385 }
 386
 387 #if GST_CHECK_VERSION(1,0,0)
 388 static gboolean
 389 gst_vaapidecode_decide_allocation(GstVideoDecoder *vdec, GstQuery *query)
 390 {
 391     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 392     GstCaps *caps = NULL;
 393     GstBufferPool *pool;
 394     GstStructure *config;
 395     GstVideoInfo vi;
 396     guint size, min, max;
 397     gboolean need_pool, update_pool;
 398
 399     gst_query_parse_allocation(query, &caps, &need_pool);
 400
 401     if (!caps)
 402         goto error_no_caps;
 403
 404     gst_video_info_init(&vi);
 405     gst_video_info_from_caps(&vi, caps);
 406     if (GST_VIDEO_INFO_FORMAT(&vi) == GST_VIDEO_FORMAT_ENCODED)
 407         gst_video_info_set_format(&vi, GST_VIDEO_FORMAT_NV12,
 408             GST_VIDEO_INFO_WIDTH(&vi), GST_VIDEO_INFO_HEIGHT(&vi));
 409
 410     g_return_val_if_fail(decode->display != NULL, FALSE);
 411
 412     if (gst_query_get_n_allocation_pools(query) > 0) {
 413         gst_query_parse_nth_allocation_pool(query, 0, &pool, &size, &min, &max);
 414         size = MAX(size, vi.size);
 415         update_pool = TRUE;
 416     }
 417     else {
 418         pool = NULL;
 419         size = vi.size;
 420         min = max = 0;
 421         update_pool = FALSE;
 422     }
 423
 424     if (!pool || !gst_buffer_pool_has_option(pool,
 425             GST_BUFFER_POOL_OPTION_VAAPI_VIDEO_META)) {
 426         GST_INFO("no pool or doesn't support GstVaapiVideoMeta, "
 427             "making new pool");
 428         pool = gst_vaapi_video_buffer_pool_new(decode->display);
 429         if (!pool)
 430             goto error_create_pool;
 431
 432         config = gst_buffer_pool_get_config(pool);
 433         gst_buffer_pool_config_set_params(config, caps, size, min, max);
 434         gst_buffer_pool_config_add_option(config,
 435             GST_BUFFER_POOL_OPTION_VAAPI_VIDEO_META);
 436         gst_buffer_pool_set_config(pool, config);
 437     }
 438
 439     if (update_pool)
 440         gst_query_set_nth_allocation_pool(query, 0, pool, size, min, max);
 441     else
 442         gst_query_add_allocation_pool(query, pool, size, min, max);
 443     if (pool)
 444         g_object_unref(pool);
 445     return TRUE;
 446
 447     /* ERRORS */
 448 error_no_caps:
 449     {
 450         GST_ERROR("no caps specified");
 451         return FALSE;
 452     }
 453 error_create_pool:
 454     {
 455         GST_ERROR("failed to create buffer pool");
 456         return FALSE;
 457     }
 458 }
 459 #endif
 460
 461 static inline gboolean
 462 gst_vaapidecode_ensure_display(GstVaapiDecode *decode)
 463 {
 464     return gst_vaapi_ensure_display(decode, GST_VAAPI_DISPLAY_TYPE_ANY,
 465         &decode->display);
 466 }
 467
 468 static inline guint
 469 gst_vaapi_codec_from_caps(GstCaps *caps)
 470 {
 471     return gst_vaapi_profile_get_codec(gst_vaapi_profile_from_caps(caps));
 472 }
 473
 474 static gboolean
 475 gst_vaapidecode_create(GstVaapiDecode *decode, GstCaps *caps)
 476 {
 477     GstVaapiDisplay *dpy;
 478
 479     if (!gst_vaapidecode_ensure_display(decode))
 480         return FALSE;
 481     dpy = decode->display;
 482
 483     switch (gst_vaapi_codec_from_caps(caps)) {
 484     case GST_VAAPI_CODEC_MPEG2:
 485         decode->decoder = gst_vaapi_decoder_mpeg2_new(dpy, caps);
 486         break;
 487     case GST_VAAPI_CODEC_MPEG4:
 488     case GST_VAAPI_CODEC_H263:
 489         decode->decoder = gst_vaapi_decoder_mpeg4_new(dpy, caps);
 490         break;
 491     case GST_VAAPI_CODEC_H264:
 492         decode->decoder = gst_vaapi_decoder_h264_new(dpy, caps);
 493         break;
 494     case GST_VAAPI_CODEC_WMV3:
 495     case GST_VAAPI_CODEC_VC1:
 496         decode->decoder = gst_vaapi_decoder_vc1_new(dpy, caps);
 497         break;
 498 #if USE_JPEG_DECODER
 499     case GST_VAAPI_CODEC_JPEG:
 500         decode->decoder = gst_vaapi_decoder_jpeg_new(dpy, caps);
 501         break;
 502 #endif
 503     default:
 504         decode->decoder = NULL;
 505         break;
 506     }
 507     if (!decode->decoder)
 508         return FALSE;
 509
 510     g_signal_connect(
 511         G_OBJECT(decode->decoder),
 512         "notify::caps",
 513         G_CALLBACK(gst_vaapi_decoder_notify_caps),
 514         decode
 515     );
 516
 517     decode->decoder_caps = gst_caps_ref(caps);
 518     return TRUE;
 519 }
 520
 521 static void
 522 gst_vaapidecode_destroy(GstVaapiDecode *decode)
 523 {
 524     g_clear_object(&decode->decoder);
 525     gst_caps_replace(&decode->decoder_caps, NULL);
 526     gst_vaapidecode_release(decode);
 527 }
 528
 529 static gboolean
 530 gst_vaapidecode_reset_full(GstVaapiDecode *decode, GstCaps *caps, gboolean hard)
 531 {
 532     GstVaapiCodec codec;
 533
 534     /* Reset timers if hard reset was requested (e.g. seek) */
 535     if (hard) {
 536         decode->render_time_base = 0;
 537         decode->last_buffer_time = 0;
 538     }
 539
 540     /* Only reset decoder if codec type changed */
 541     else if (decode->decoder && decode->decoder_caps) {
 542         if (gst_caps_is_always_compatible(caps, decode->decoder_caps))
 543             return TRUE;
 544         codec = gst_vaapi_codec_from_caps(caps);
 545         if (codec == gst_vaapi_decoder_get_codec(decode->decoder))
 546             return TRUE;
 547     }
 548
 549     gst_vaapidecode_destroy(decode);
 550     return gst_vaapidecode_create(decode, caps);
 551 }
 552
 553 static void
 554 gst_vaapidecode_finalize(GObject *object)
 555 {
 556     GstVaapiDecode * const decode = GST_VAAPIDECODE(object);
 557
 558     gst_vaapidecode_destroy(decode);
 559
 560     gst_caps_replace(&decode->sinkpad_caps, NULL);
 561     gst_caps_replace(&decode->srcpad_caps,  NULL);
 562     gst_caps_replace(&decode->allowed_caps, NULL);
 563
 564     g_clear_object(&decode->display);
 565
 566     g_cond_clear(&decode->decoder_ready);
 567     g_mutex_clear(&decode->decoder_mutex);
 568
 569     G_OBJECT_CLASS(gst_vaapidecode_parent_class)->finalize(object);
 570 }
 571
 572 static gboolean
 573 gst_vaapidecode_open(GstVideoDecoder *vdec)
 574 {
 575     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 576     GstVaapiDisplay * const old_display = decode->display;
 577     gboolean success;
 578
 579     /* Let GstVideoContext ask for a proper display to its neighbours */
 580     /* Note: steal old display that may be allocated from get_caps()
 581        so that to retain a reference to it, thus avoiding extra
 582        initialization steps if we turn out to simply re-use the
 583        existing (cached) VA display */
 584     decode->display = NULL;
 585     success = gst_vaapidecode_ensure_display(decode);
 586     g_clear_object(&old_display);
 587     return success;
 588 }
 589
 590 static gboolean
 591 gst_vaapidecode_close(GstVideoDecoder *vdec)
 592 {
 593     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 594
 595     gst_vaapidecode_destroy(decode);
 596     g_clear_object(&decode->display);
 597     return TRUE;
 598 }
 599
 600 static gboolean
 601 gst_vaapidecode_reset(GstVideoDecoder *vdec, gboolean hard)
 602 {
 603     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 604
 605     return gst_vaapidecode_reset_full(decode, decode->sinkpad_caps, hard);
 606 }
 607
 608 static gboolean
 609 gst_vaapidecode_set_format(GstVideoDecoder *vdec, GstVideoCodecState *state)
 610 {
 611     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 612
 613     if (!gst_vaapidecode_update_sink_caps(decode, state->caps))
 614         return FALSE;
 615     if (!gst_vaapidecode_update_src_caps(decode, state))
 616         return FALSE;
 617     if (!gst_vaapidecode_reset_full(decode, decode->sinkpad_caps, FALSE))
 618         return FALSE;
 619     return TRUE;
 620 }
 621
 622 static GstFlowReturn
 623 gst_vaapidecode_parse(GstVideoDecoder *vdec,
 624     GstVideoCodecFrame *frame, GstAdapter *adapter, gboolean at_eos)
 625 {
 626     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 627     GstVaapiDecoderStatus status;
 628     GstFlowReturn ret;
 629     guint got_unit_size;
 630     gboolean got_frame;
 631
 632     status = gst_vaapi_decoder_parse(decode->decoder, frame,
 633         adapter, at_eos, &got_unit_size, &got_frame);
 634
 635     switch (status) {
 636     case GST_VAAPI_DECODER_STATUS_SUCCESS:
 637         if (got_unit_size > 0)
 638             gst_video_decoder_add_to_frame(vdec, got_unit_size);
 639         if (got_frame)
 640             ret = gst_video_decoder_have_frame(vdec);
 641         else
 642             ret = GST_FLOW_OK;
 643         break;
 644     case GST_VAAPI_DECODER_STATUS_ERROR_NO_DATA:
 645         ret = GST_VIDEO_DECODER_FLOW_NEED_DATA;
 646         break;
 647     case GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CODEC:
 648     case GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_PROFILE:
 649     case GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CHROMA_FORMAT:
 650         GST_WARNING("parse error %d", status);
 651         ret = GST_FLOW_NOT_SUPPORTED;
 652         break;
 653     default:
 654         GST_ERROR("parse error %d", status);
 655         ret = GST_FLOW_EOS;
 656         break;
 657     }
 658     return ret;
 659 }
 660
 661 static void
 662 gst_vaapidecode_class_init(GstVaapiDecodeClass *klass)
 663 {
 664     GObjectClass * const object_class = G_OBJECT_CLASS(klass);
 665     GstElementClass * const element_class = GST_ELEMENT_CLASS(klass);
 666     GstVideoDecoderClass * const vdec_class = GST_VIDEO_DECODER_CLASS(klass);
 667     GstPadTemplate *pad_template;
 668
 669     GST_DEBUG_CATEGORY_INIT(gst_debug_vaapidecode,
 670                             GST_PLUGIN_NAME, 0, GST_PLUGIN_DESC);
 671
 672     object_class->finalize   = gst_vaapidecode_finalize;
 673
 674     vdec_class->open         = GST_DEBUG_FUNCPTR(gst_vaapidecode_open);
 675     vdec_class->close        = GST_DEBUG_FUNCPTR(gst_vaapidecode_close);
 676     vdec_class->set_format   = GST_DEBUG_FUNCPTR(gst_vaapidecode_set_format);
 677     vdec_class->reset        = GST_DEBUG_FUNCPTR(gst_vaapidecode_reset);
 678     vdec_class->parse        = GST_DEBUG_FUNCPTR(gst_vaapidecode_parse);
 679     vdec_class->handle_frame = GST_DEBUG_FUNCPTR(gst_vaapidecode_handle_frame);
 680     vdec_class->finish       = GST_DEBUG_FUNCPTR(gst_vaapidecode_finish);
 681
 682 #if GST_CHECK_VERSION(1,0,0)
 683     vdec_class->decide_allocation =
 684         GST_DEBUG_FUNCPTR(gst_vaapidecode_decide_allocation);
 685 #endif
 686
 687     gst_element_class_set_static_metadata(element_class,
 688         "VA-API decoder",
 689         "Codec/Decoder/Video",
 690         GST_PLUGIN_DESC,
 691         "Gwenole Beauchesne <gwenole.beauchesne@intel.com>");
 692
 693     /* sink pad */
 694     pad_template = gst_static_pad_template_get(&gst_vaapidecode_sink_factory);
 695     gst_element_class_add_pad_template(element_class, pad_template);
 696
 697     /* src pad */
 698     pad_template = gst_static_pad_template_get(&gst_vaapidecode_src_factory);
 699     gst_element_class_add_pad_template(element_class, pad_template);
 700 }
 701
 702 static gboolean
 703 gst_vaapidecode_ensure_allowed_caps(GstVaapiDecode *decode)
 704 {
 705     GstCaps *decode_caps;
 706     guint i, n_decode_caps;
 707
 708     if (decode->allowed_caps)
 709         return TRUE;
 710
 711     if (!gst_vaapidecode_ensure_display(decode))
 712         goto error_no_display;
 713
 714     decode_caps = gst_vaapi_display_get_decode_caps(decode->display);
 715     if (!decode_caps)
 716         goto error_no_decode_caps;
 717     n_decode_caps = gst_caps_get_size(decode_caps);
 718
 719     decode->allowed_caps = gst_caps_new_empty();
 720     if (!decode->allowed_caps)
 721         goto error_no_memory;
 722
 723     for (i = 0; i < n_decode_caps; i++) {
 724         GstStructure *structure;
 725         structure = gst_caps_get_structure(decode_caps, i);
 726         if (!structure)
 727             continue;
 728         structure = gst_structure_copy(structure);
 729         if (!structure)
 730             continue;
 731         gst_structure_remove_field(structure, "profile");
 732         gst_structure_set(
 733             structure,
 734             "width",  GST_TYPE_INT_RANGE, 1, G_MAXINT,
 735             "height", GST_TYPE_INT_RANGE, 1, G_MAXINT,
 736             NULL
 737         );
 738         decode->allowed_caps =
 739             gst_caps_merge_structure(decode->allowed_caps, structure);
 740     }
 741
 742     gst_caps_unref(decode_caps);
 743     return TRUE;
 744
 745     /* ERRORS */
 746 error_no_display:
 747     {
 748         GST_ERROR("failed to retrieve VA display");
 749         return FALSE;
 750     }
 751 error_no_decode_caps:
 752     {
 753         GST_ERROR("failed to retrieve VA decode caps");
 754         return FALSE;
 755     }
 756 error_no_memory:
 757     {
 758         GST_ERROR("failed to allocate allowed-caps set");
 759         gst_caps_unref(decode_caps);
 760         return FALSE;
 761     }
 762 }
 763
 764 static GstCaps *
 765 gst_vaapidecode_get_caps(GstPad *pad)
 766 {
 767     GstVaapiDecode * const decode = GST_VAAPIDECODE(GST_OBJECT_PARENT(pad));
 768
 769     if (!gst_vaapidecode_ensure_allowed_caps(decode))
 770         return gst_caps_new_empty();
 771
 772     return gst_caps_ref(decode->allowed_caps);
 773 }
 774
 775 static gboolean
 776 gst_vaapidecode_query(GST_PAD_QUERY_FUNCTION_ARGS)
 777 {
 778     GstVaapiDecode * const decode =
 779         GST_VAAPIDECODE(gst_pad_get_parent_element(pad));
 780     gboolean res;
 781
 782     GST_DEBUG("sharing display %p", decode->display);
 783
 784     if (gst_vaapi_reply_to_query(query, decode->display))
 785         res = TRUE;
 786     else if (GST_PAD_IS_SINK(pad)) {
 787         switch (GST_QUERY_TYPE(query)) {
 788 #if GST_CHECK_VERSION(1,0,0)
 789         case GST_QUERY_CAPS: {
 790             GstCaps * const caps = gst_vaapidecode_get_caps(pad);
 791             gst_query_set_caps_result(query, caps);
 792             gst_caps_unref(caps);
 793             res = TRUE;
 794             break;
 795         }
 796 #endif
 797         default:
 798             res = GST_PAD_QUERY_FUNCTION_CALL(decode->sinkpad_query,
 799                 decode->sinkpad, parent, query);
 800             break;
 801         }
 802     }
 803     else
 804         res = GST_PAD_QUERY_FUNCTION_CALL(decode->srcpad_query,
 805             decode->srcpad, parent, query);
 806
 807     g_object_unref(decode);
 808     return res;
 809 }
 810
 811 static void
 812 gst_vaapidecode_init(GstVaapiDecode *decode)
 813 {
 814     GstVideoDecoder * const vdec = GST_VIDEO_DECODER(decode);
 815
 816     decode->display             = NULL;
 817     decode->decoder             = NULL;
 818     decode->decoder_caps        = NULL;
 819     decode->allowed_caps        = NULL;
 820     decode->render_time_base    = 0;
 821     decode->last_buffer_time    = 0;
 822
 823     g_mutex_init(&decode->decoder_mutex);
 824     g_cond_init(&decode->decoder_ready);
 825
 826     gst_video_decoder_set_packetized(vdec, FALSE);
 827
 828     /* Pad through which data comes in to the element */
 829     decode->sinkpad = GST_VIDEO_DECODER_SINK_PAD(vdec);
 830     decode->sinkpad_query = GST_PAD_QUERYFUNC(decode->sinkpad);
 831     gst_pad_set_query_function(decode->sinkpad, gst_vaapidecode_query);
 832 #if !GST_CHECK_VERSION(1,0,0)
 833     gst_pad_set_getcaps_function(decode->sinkpad, gst_vaapidecode_get_caps);
 834 #endif
 835
 836     /* Pad through which data goes out of the element */
 837     decode->srcpad = GST_VIDEO_DECODER_SRC_PAD(vdec);
 838     decode->srcpad_query = GST_PAD_QUERYFUNC(decode->srcpad);
 839     gst_pad_set_query_function(decode->srcpad, gst_vaapidecode_query);
 840 }