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     const GstVideoCodecState *ref_state);
 134
 135 static void
 136 gst_vaapi_decoder_state_changed(GstVaapiDecoder *decoder,
 137     const GstVideoCodecState *codec_state, gpointer user_data)
 138 {
 139     GstVaapiDecode * const decode = GST_VAAPIDECODE(user_data);
 140
 141     g_assert(decode->decoder == decoder);
 142
 143     gst_vaapidecode_update_src_caps(decode, codec_state);
 144 }
 145
 146 static inline gboolean
 147 gst_vaapidecode_update_sink_caps(GstVaapiDecode *decode, GstCaps *caps)
 148 {
 149     gst_caps_replace(&decode->sinkpad_caps, caps);
 150     return TRUE;
 151 }
 152
 153 static gboolean
 154 gst_vaapidecode_update_src_caps(GstVaapiDecode *decode,
 155     const GstVideoCodecState *ref_state)
 156 {
 157     GstVideoDecoder * const vdec = GST_VIDEO_DECODER(decode);
 158     GstVideoCodecState *state;
 159     GstVideoInfo *vi, vis;
 160
 161     state = gst_video_decoder_set_output_state(vdec,
 162         GST_VIDEO_INFO_FORMAT(&ref_state->info),
 163         ref_state->info.width, ref_state->info.height,
 164         (GstVideoCodecState *)ref_state);
 165     if (!state)
 166         return FALSE;
 167
 168     vi = &state->info;
 169     if (GST_VIDEO_INFO_FORMAT(vi) == GST_VIDEO_FORMAT_ENCODED) {
 170         gst_video_info_init(&vis);
 171         gst_video_info_set_format(&vis, GST_VIDEO_FORMAT_NV12,
 172             GST_VIDEO_INFO_WIDTH(vi), GST_VIDEO_INFO_HEIGHT(vi));
 173         vi->size = vis.size;
 174     }
 175     gst_video_codec_state_unref(state);
 176
 177     /* XXX: gst_video_info_to_caps() from GStreamer 0.10 does not
 178        reconstruct suitable caps for "encoded" video formats */
 179     state->caps = gst_caps_from_string(GST_VAAPI_SURFACE_CAPS_NAME);
 180     if (!state->caps)
 181         return FALSE;
 182
 183     gst_caps_set_simple(state->caps,
 184         "type", G_TYPE_STRING, "vaapi",
 185         "opengl", G_TYPE_BOOLEAN, USE_GLX,
 186         "width", G_TYPE_INT, vi->width,
 187         "height", G_TYPE_INT, vi->height,
 188         "framerate", GST_TYPE_FRACTION, vi->fps_n, vi->fps_d,
 189         "pixel-aspect-ratio", GST_TYPE_FRACTION, vi->par_n, vi->par_d,
 190         NULL);
 191
 192     if (GST_VIDEO_INFO_IS_INTERLACED(vi)) {
 193         GstStructure * const structure =
 194             gst_caps_get_structure(state->caps, 0);
 195         gst_structure_set_interlaced(structure, TRUE);
 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         end_time = decode->render_time_base;
 219     else
 220         end_time = g_get_monotonic_time();
 221     end_time += GST_TIME_AS_USECONDS(decode->last_buffer_time);
 222     end_time += G_TIME_SPAN_SECOND;
 223
 224     /* Decode current frame */
 225     for (;;) {
 226         status = gst_vaapi_decoder_decode(decode->decoder, frame);
 227         if (status == GST_VAAPI_DECODER_STATUS_ERROR_NO_SURFACE) {
 228             gboolean was_signalled;
 229             GST_VIDEO_DECODER_STREAM_UNLOCK(vdec);
 230             g_mutex_lock(&decode->decoder_mutex);
 231             was_signalled = g_cond_wait_until(
 232                 &decode->decoder_ready,
 233                 &decode->decoder_mutex,
 234                 end_time
 235             );
 236             g_mutex_unlock(&decode->decoder_mutex);
 237             GST_VIDEO_DECODER_STREAM_LOCK(vdec);
 238             if (was_signalled)
 239                 continue;
 240             goto error_decode_timeout;
 241         }
 242         if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
 243             goto error_decode;
 244         break;
 245     }
 246     return GST_FLOW_OK;
 247
 248     /* ERRORS */
 249 error_decode_timeout:
 250     {
 251         GST_WARNING("decode timeout. Decoder required a VA surface but none "
 252                     "got available within one second");
 253         return GST_FLOW_EOS;
 254     }
 255 error_decode:
 256     {
 257         GST_ERROR("decode error %d", status);
 258         switch (status) {
 259         case GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CODEC:
 260         case GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_PROFILE:
 261         case GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CHROMA_FORMAT:
 262             ret = GST_FLOW_NOT_SUPPORTED;
 263             break;
 264         default:
 265             ret = GST_FLOW_EOS;
 266             break;
 267         }
 268         gst_video_decoder_drop_frame(vdec, frame);
 269         return ret;
 270     }
 271 }
 272
 273 static GstFlowReturn
 274 gst_vaapidecode_push_decoded_frame(GstVideoDecoder *vdec)
 275 {
 276     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 277     GstVaapiSurfaceProxy *proxy;
 278     GstVaapiDecoderStatus status;
 279     GstVaapiVideoMeta *meta;
 280     GstVideoCodecFrame *out_frame;
 281     GstFlowReturn ret;
 282     guint flags;
 283
 284     status = gst_vaapi_decoder_get_frame_with_timeout(decode->decoder,
 285         &out_frame, 100000);
 286     if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
 287         return GST_VIDEO_DECODER_FLOW_NEED_DATA;
 288
 289     if (!GST_VIDEO_CODEC_FRAME_IS_DECODE_ONLY(out_frame)) {
 290         proxy = gst_video_codec_frame_get_user_data(out_frame);
 291
 292         gst_vaapi_surface_proxy_set_destroy_notify(proxy,
 293             (GDestroyNotify)gst_vaapidecode_release, decode);
 294
 295 #if GST_CHECK_VERSION(1,0,0)
 296         ret = gst_video_decoder_allocate_output_frame(vdec, out_frame);
 297         if (ret != GST_FLOW_OK)
 298             goto error_create_buffer;
 299
 300         meta = gst_buffer_get_vaapi_video_meta(out_frame->output_buffer);
 301         if (!meta)
 302             goto error_get_meta;
 303         gst_vaapi_video_meta_set_surface_proxy(meta, proxy);
 304
 305         flags = gst_vaapi_surface_proxy_get_flags(proxy);
 306         if (flags & GST_VAAPI_SURFACE_PROXY_FLAG_INTERLACED) {
 307             guint out_flags = GST_VIDEO_BUFFER_FLAG_INTERLACED;
 308             if (flags & GST_VAAPI_SURFACE_PROXY_FLAG_TFF)
 309                 out_flags |= GST_VIDEO_BUFFER_FLAG_TFF;
 310             if (flags & GST_VAAPI_SURFACE_PROXY_FLAG_RFF)
 311                 out_flags |= GST_VIDEO_BUFFER_FLAG_RFF;
 312             if (flags & GST_VAAPI_SURFACE_PROXY_FLAG_ONEFIELD)
 313                 out_flags |= GST_VIDEO_BUFFER_FLAG_ONEFIELD;
 314             GST_BUFFER_FLAG_SET(out_frame->output_buffer, out_flags);
 315         }
 316 #else
 317         out_frame->output_buffer =
 318             gst_vaapi_video_buffer_new_with_surface_proxy(proxy);
 319         if (!out_frame->output_buffer)
 320             goto error_create_buffer;
 321 #endif
 322     }
 323
 324     ret = gst_video_decoder_finish_frame(vdec, out_frame);
 325     if (ret != GST_FLOW_OK)
 326         goto error_commit_buffer;
 327
 328     /* Estimate when this frame would no longer be needed for rendering */
 329     if (GST_CLOCK_TIME_IS_VALID(out_frame->pts)) {
 330         if (!decode->render_time_base)
 331             decode->render_time_base = g_get_monotonic_time() -
 332                 GST_TIME_AS_USECONDS(out_frame->pts);
 333         decode->last_buffer_time = out_frame->pts;
 334         if (GST_CLOCK_TIME_IS_VALID(out_frame->duration))
 335             decode->last_buffer_time += out_frame->duration;
 336         else
 337             decode->last_buffer_time += GST_SECOND;
 338     }
 339     else {
 340         decode->render_time_base = 0;
 341         decode->last_buffer_time = 0;
 342     }
 343
 344     gst_video_codec_frame_unref(out_frame);
 345     return GST_FLOW_OK;
 346
 347     /* ERRORS */
 348 error_create_buffer:
 349     {
 350         const GstVaapiID surface_id =
 351             gst_vaapi_surface_get_id(GST_VAAPI_SURFACE_PROXY_SURFACE(proxy));
 352
 353         GST_ERROR("video sink failed to create video buffer for proxy'ed "
 354                   "surface %" GST_VAAPI_ID_FORMAT,
 355                   GST_VAAPI_ID_ARGS(surface_id));
 356         gst_video_decoder_drop_frame(vdec, out_frame);
 357         gst_video_codec_frame_unref(out_frame);
 358         return GST_FLOW_EOS;
 359     }
 360 #if GST_CHECK_VERSION(1,0,0)
 361 error_get_meta:
 362     {
 363         GST_ERROR("failed to get vaapi video meta attached to video buffer");
 364         gst_video_decoder_drop_frame(vdec, out_frame);
 365         gst_video_codec_frame_unref(out_frame);
 366         return GST_FLOW_EOS;
 367     }
 368 #endif
 369 error_commit_buffer:
 370     {
 371         if (ret != GST_FLOW_FLUSHING)
 372             GST_ERROR("video sink rejected the video buffer (error %d)", ret);
 373         gst_video_codec_frame_unref(out_frame);
 374         return GST_FLOW_EOS;
 375     }
 376 }
 377
 378 static GstFlowReturn
 379 gst_vaapidecode_handle_frame(GstVideoDecoder *vdec, GstVideoCodecFrame *frame)
 380 {
 381     GstFlowReturn ret;
 382
 383     /* Make sure to release the base class stream lock so that decode
 384        loop can call gst_video_decoder_finish_frame() without blocking */
 385     GST_VIDEO_DECODER_STREAM_UNLOCK(vdec);
 386     ret = gst_vaapidecode_decode_frame(vdec, frame);
 387     GST_VIDEO_DECODER_STREAM_LOCK(vdec);
 388     return ret;
 389 }
 390
 391 static void
 392 gst_vaapidecode_decode_loop(GstVaapiDecode *decode)
 393 {
 394     GstVideoDecoder * const vdec = GST_VIDEO_DECODER(decode);
 395     GstFlowReturn ret;
 396
 397     ret = gst_vaapidecode_push_decoded_frame(vdec);
 398     if (ret == GST_FLOW_OK || ret == GST_VIDEO_DECODER_FLOW_NEED_DATA)
 399         return;
 400
 401     /* ERRORS */
 402     gst_pad_pause_task(decode->srcpad);
 403 }
 404
 405 static GstFlowReturn
 406 gst_vaapidecode_finish(GstVideoDecoder *vdec)
 407 {
 408     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 409     GstVaapiDecoderStatus status;
 410
 411     status = gst_vaapi_decoder_flush(decode->decoder);
 412     if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
 413         goto error_flush;
 414
 415     /* Make sure the decode loop function has a chance to return, thus
 416        possibly unlocking gst_video_decoder_finish_frame() */
 417     GST_VIDEO_DECODER_STREAM_UNLOCK(vdec);
 418     gst_pad_stop_task(decode->srcpad);
 419     GST_VIDEO_DECODER_STREAM_LOCK(vdec);
 420
 421     /* Submit all frames that got decoded so far */
 422     while (gst_vaapidecode_push_decoded_frame(vdec) == GST_FLOW_OK)
 423         ;
 424     return GST_FLOW_OK;
 425
 426     /* ERRORS */
 427 error_flush:
 428     {
 429         GST_ERROR("failed to flush decoder (status %d)", status);
 430         return GST_FLOW_EOS;
 431     }
 432 }
 433
 434 #if GST_CHECK_VERSION(1,0,0)
 435 static gboolean
 436 gst_vaapidecode_decide_allocation(GstVideoDecoder *vdec, GstQuery *query)
 437 {
 438     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 439     GstCaps *caps = NULL;
 440     GstBufferPool *pool;
 441     GstStructure *config;
 442     GstVideoInfo vi;
 443     guint size, min, max;
 444     gboolean need_pool, update_pool;
 445
 446     gst_query_parse_allocation(query, &caps, &need_pool);
 447
 448     if (!caps)
 449         goto error_no_caps;
 450
 451     gst_video_info_init(&vi);
 452     gst_video_info_from_caps(&vi, caps);
 453     if (GST_VIDEO_INFO_FORMAT(&vi) == GST_VIDEO_FORMAT_ENCODED)
 454         gst_video_info_set_format(&vi, GST_VIDEO_FORMAT_NV12,
 455             GST_VIDEO_INFO_WIDTH(&vi), GST_VIDEO_INFO_HEIGHT(&vi));
 456
 457     g_return_val_if_fail(decode->display != NULL, FALSE);
 458
 459     if (gst_query_get_n_allocation_pools(query) > 0) {
 460         gst_query_parse_nth_allocation_pool(query, 0, &pool, &size, &min, &max);
 461         size = MAX(size, vi.size);
 462         update_pool = TRUE;
 463     }
 464     else {
 465         pool = NULL;
 466         size = vi.size;
 467         min = max = 0;
 468         update_pool = FALSE;
 469     }
 470
 471     if (!pool || !gst_buffer_pool_has_option(pool,
 472             GST_BUFFER_POOL_OPTION_VAAPI_VIDEO_META)) {
 473         GST_INFO("no pool or doesn't support GstVaapiVideoMeta, "
 474             "making new pool");
 475         pool = gst_vaapi_video_buffer_pool_new(decode->display);
 476         if (!pool)
 477             goto error_create_pool;
 478
 479         config = gst_buffer_pool_get_config(pool);
 480         gst_buffer_pool_config_set_params(config, caps, size, min, max);
 481         gst_buffer_pool_config_add_option(config,
 482             GST_BUFFER_POOL_OPTION_VAAPI_VIDEO_META);
 483         gst_buffer_pool_set_config(pool, config);
 484     }
 485
 486     if (update_pool)
 487         gst_query_set_nth_allocation_pool(query, 0, pool, size, min, max);
 488     else
 489         gst_query_add_allocation_pool(query, pool, size, min, max);
 490     if (pool)
 491         gst_object_unref(pool);
 492     return TRUE;
 493
 494     /* ERRORS */
 495 error_no_caps:
 496     {
 497         GST_ERROR("no caps specified");
 498         return FALSE;
 499     }
 500 error_create_pool:
 501     {
 502         GST_ERROR("failed to create buffer pool");
 503         return FALSE;
 504     }
 505 }
 506 #endif
 507
 508 static inline gboolean
 509 gst_vaapidecode_ensure_display(GstVaapiDecode *decode)
 510 {
 511     return gst_vaapi_ensure_display(decode, GST_VAAPI_DISPLAY_TYPE_ANY,
 512         &decode->display);
 513 }
 514
 515 static inline guint
 516 gst_vaapi_codec_from_caps(GstCaps *caps)
 517 {
 518     return gst_vaapi_profile_get_codec(gst_vaapi_profile_from_caps(caps));
 519 }
 520
 521 static gboolean
 522 gst_vaapidecode_create(GstVaapiDecode *decode, GstCaps *caps)
 523 {
 524     GstVaapiDisplay *dpy;
 525
 526     if (!gst_vaapidecode_ensure_display(decode))
 527         return FALSE;
 528     dpy = decode->display;
 529
 530     switch (gst_vaapi_codec_from_caps(caps)) {
 531     case GST_VAAPI_CODEC_MPEG2:
 532         decode->decoder = gst_vaapi_decoder_mpeg2_new(dpy, caps);
 533         break;
 534     case GST_VAAPI_CODEC_MPEG4:
 535     case GST_VAAPI_CODEC_H263:
 536         decode->decoder = gst_vaapi_decoder_mpeg4_new(dpy, caps);
 537         break;
 538     case GST_VAAPI_CODEC_H264:
 539         decode->decoder = gst_vaapi_decoder_h264_new(dpy, caps);
 540         break;
 541     case GST_VAAPI_CODEC_WMV3:
 542     case GST_VAAPI_CODEC_VC1:
 543         decode->decoder = gst_vaapi_decoder_vc1_new(dpy, caps);
 544         break;
 545 #if USE_JPEG_DECODER
 546     case GST_VAAPI_CODEC_JPEG:
 547         decode->decoder = gst_vaapi_decoder_jpeg_new(dpy, caps);
 548         break;
 549 #endif
 550     default:
 551         decode->decoder = NULL;
 552         break;
 553     }
 554     if (!decode->decoder)
 555         return FALSE;
 556
 557     gst_vaapi_decoder_set_codec_state_changed_func(decode->decoder,
 558         gst_vaapi_decoder_state_changed, decode);
 559
 560     decode->decoder_caps = gst_caps_ref(caps);
 561     return gst_pad_start_task(decode->srcpad,
 562         (GstTaskFunction)gst_vaapidecode_decode_loop, decode, NULL);
 563 }
 564
 565 static void
 566 gst_vaapidecode_destroy(GstVaapiDecode *decode)
 567 {
 568     gst_pad_stop_task(decode->srcpad);
 569     gst_vaapi_decoder_replace(&decode->decoder, NULL);
 570     gst_caps_replace(&decode->decoder_caps, NULL);
 571     gst_vaapidecode_release(decode);
 572 }
 573
 574 static gboolean
 575 gst_vaapidecode_reset_full(GstVaapiDecode *decode, GstCaps *caps, gboolean hard)
 576 {
 577     GstVaapiCodec codec;
 578
 579     /* Reset timers if hard reset was requested (e.g. seek) */
 580     if (hard) {
 581         decode->render_time_base = 0;
 582         decode->last_buffer_time = 0;
 583     }
 584
 585     /* Only reset decoder if codec type changed */
 586     else if (decode->decoder && decode->decoder_caps) {
 587         if (gst_caps_is_always_compatible(caps, decode->decoder_caps))
 588             return TRUE;
 589         codec = gst_vaapi_codec_from_caps(caps);
 590         if (codec == gst_vaapi_decoder_get_codec(decode->decoder))
 591             return TRUE;
 592     }
 593
 594     gst_vaapidecode_destroy(decode);
 595     return gst_vaapidecode_create(decode, caps);
 596 }
 597
 598 static void
 599 gst_vaapidecode_finalize(GObject *object)
 600 {
 601     GstVaapiDecode * const decode = GST_VAAPIDECODE(object);
 602
 603     gst_caps_replace(&decode->sinkpad_caps, NULL);
 604     gst_caps_replace(&decode->srcpad_caps,  NULL);
 605     gst_caps_replace(&decode->allowed_caps, NULL);
 606
 607     gst_vaapi_display_replace(&decode->display, NULL);
 608
 609     g_cond_clear(&decode->decoder_ready);
 610     g_mutex_clear(&decode->decoder_mutex);
 611
 612     G_OBJECT_CLASS(gst_vaapidecode_parent_class)->finalize(object);
 613 }
 614
 615 static gboolean
 616 gst_vaapidecode_open(GstVideoDecoder *vdec)
 617 {
 618     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 619     GstVaapiDisplay * const old_display = decode->display;
 620     gboolean success;
 621
 622     /* Let GstVideoContext ask for a proper display to its neighbours */
 623     /* Note: steal old display that may be allocated from get_caps()
 624        so that to retain a reference to it, thus avoiding extra
 625        initialization steps if we turn out to simply re-use the
 626        existing (cached) VA display */
 627     decode->display = NULL;
 628     success = gst_vaapidecode_ensure_display(decode);
 629     if (old_display)
 630         gst_vaapi_display_unref(old_display);
 631     return success;
 632 }
 633
 634 static gboolean
 635 gst_vaapidecode_close(GstVideoDecoder *vdec)
 636 {
 637     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 638
 639     gst_vaapidecode_destroy(decode);
 640     gst_vaapi_display_replace(&decode->display, NULL);
 641     return TRUE;
 642 }
 643
 644 static gboolean
 645 gst_vaapidecode_reset(GstVideoDecoder *vdec, gboolean hard)
 646 {
 647     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 648
 649     return gst_vaapidecode_reset_full(decode, decode->sinkpad_caps, hard);
 650 }
 651
 652 static gboolean
 653 gst_vaapidecode_set_format(GstVideoDecoder *vdec, GstVideoCodecState *state)
 654 {
 655     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 656
 657     if (!gst_vaapidecode_update_sink_caps(decode, state->caps))
 658         return FALSE;
 659     if (!gst_vaapidecode_update_src_caps(decode, state))
 660         return FALSE;
 661     if (!gst_vaapidecode_reset_full(decode, decode->sinkpad_caps, FALSE))
 662         return FALSE;
 663     return TRUE;
 664 }
 665
 666 static GstFlowReturn
 667 gst_vaapidecode_parse(GstVideoDecoder *vdec,
 668     GstVideoCodecFrame *frame, GstAdapter *adapter, gboolean at_eos)
 669 {
 670     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 671     GstVaapiDecoderStatus status;
 672     GstFlowReturn ret;
 673     guint got_unit_size;
 674     gboolean got_frame;
 675
 676     status = gst_vaapi_decoder_parse(decode->decoder, frame,
 677         adapter, at_eos, &got_unit_size, &got_frame);
 678
 679     switch (status) {
 680     case GST_VAAPI_DECODER_STATUS_SUCCESS:
 681         if (got_unit_size > 0)
 682             gst_video_decoder_add_to_frame(vdec, got_unit_size);
 683         if (got_frame)
 684             ret = gst_video_decoder_have_frame(vdec);
 685         else
 686             ret = GST_FLOW_OK;
 687         break;
 688     case GST_VAAPI_DECODER_STATUS_ERROR_NO_DATA:
 689         ret = GST_VIDEO_DECODER_FLOW_NEED_DATA;
 690         break;
 691     case GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CODEC:
 692     case GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_PROFILE:
 693     case GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CHROMA_FORMAT:
 694         GST_WARNING("parse error %d", status);
 695         ret = GST_FLOW_NOT_SUPPORTED;
 696         break;
 697     default:
 698         GST_ERROR("parse error %d", status);
 699         ret = GST_FLOW_EOS;
 700         break;
 701     }
 702     return ret;
 703 }
 704
 705 static void
 706 gst_vaapidecode_class_init(GstVaapiDecodeClass *klass)
 707 {
 708     GObjectClass * const object_class = G_OBJECT_CLASS(klass);
 709     GstElementClass * const element_class = GST_ELEMENT_CLASS(klass);
 710     GstVideoDecoderClass * const vdec_class = GST_VIDEO_DECODER_CLASS(klass);
 711     GstPadTemplate *pad_template;
 712
 713     GST_DEBUG_CATEGORY_INIT(gst_debug_vaapidecode,
 714                             GST_PLUGIN_NAME, 0, GST_PLUGIN_DESC);
 715
 716     object_class->finalize   = gst_vaapidecode_finalize;
 717
 718     vdec_class->open         = GST_DEBUG_FUNCPTR(gst_vaapidecode_open);
 719     vdec_class->close        = GST_DEBUG_FUNCPTR(gst_vaapidecode_close);
 720     vdec_class->set_format   = GST_DEBUG_FUNCPTR(gst_vaapidecode_set_format);
 721     vdec_class->reset        = GST_DEBUG_FUNCPTR(gst_vaapidecode_reset);
 722     vdec_class->parse        = GST_DEBUG_FUNCPTR(gst_vaapidecode_parse);
 723     vdec_class->handle_frame = GST_DEBUG_FUNCPTR(gst_vaapidecode_handle_frame);
 724     vdec_class->finish       = GST_DEBUG_FUNCPTR(gst_vaapidecode_finish);
 725
 726 #if GST_CHECK_VERSION(1,0,0)
 727     vdec_class->decide_allocation =
 728         GST_DEBUG_FUNCPTR(gst_vaapidecode_decide_allocation);
 729 #endif
 730
 731     gst_element_class_set_static_metadata(element_class,
 732         "VA-API decoder",
 733         "Codec/Decoder/Video",
 734         GST_PLUGIN_DESC,
 735         "Gwenole Beauchesne <gwenole.beauchesne@intel.com>");
 736
 737     /* sink pad */
 738     pad_template = gst_static_pad_template_get(&gst_vaapidecode_sink_factory);
 739     gst_element_class_add_pad_template(element_class, pad_template);
 740
 741     /* src pad */
 742     pad_template = gst_static_pad_template_get(&gst_vaapidecode_src_factory);
 743     gst_element_class_add_pad_template(element_class, pad_template);
 744 }
 745
 746 static gboolean
 747 gst_vaapidecode_ensure_allowed_caps(GstVaapiDecode *decode)
 748 {
 749     GstCaps *decode_caps;
 750     guint i, n_decode_caps;
 751
 752     if (decode->allowed_caps)
 753         return TRUE;
 754
 755     if (!gst_vaapidecode_ensure_display(decode))
 756         goto error_no_display;
 757
 758     decode_caps = gst_vaapi_display_get_decode_caps(decode->display);
 759     if (!decode_caps)
 760         goto error_no_decode_caps;
 761     n_decode_caps = gst_caps_get_size(decode_caps);
 762
 763     decode->allowed_caps = gst_caps_new_empty();
 764     if (!decode->allowed_caps)
 765         goto error_no_memory;
 766
 767     for (i = 0; i < n_decode_caps; i++) {
 768         GstStructure *structure;
 769         structure = gst_caps_get_structure(decode_caps, i);
 770         if (!structure)
 771             continue;
 772         structure = gst_structure_copy(structure);
 773         if (!structure)
 774             continue;
 775         gst_structure_remove_field(structure, "profile");
 776         gst_structure_set(
 777             structure,
 778             "width",  GST_TYPE_INT_RANGE, 1, G_MAXINT,
 779             "height", GST_TYPE_INT_RANGE, 1, G_MAXINT,
 780             NULL
 781         );
 782         decode->allowed_caps =
 783             gst_caps_merge_structure(decode->allowed_caps, structure);
 784     }
 785
 786     gst_caps_unref(decode_caps);
 787     return TRUE;
 788
 789     /* ERRORS */
 790 error_no_display:
 791     {
 792         GST_ERROR("failed to retrieve VA display");
 793         return FALSE;
 794     }
 795 error_no_decode_caps:
 796     {
 797         GST_ERROR("failed to retrieve VA decode caps");
 798         return FALSE;
 799     }
 800 error_no_memory:
 801     {
 802         GST_ERROR("failed to allocate allowed-caps set");
 803         gst_caps_unref(decode_caps);
 804         return FALSE;
 805     }
 806 }
 807
 808 static GstCaps *
 809 gst_vaapidecode_get_caps(GstPad *pad)
 810 {
 811     GstVaapiDecode * const decode = GST_VAAPIDECODE(GST_OBJECT_PARENT(pad));
 812
 813     if (!gst_vaapidecode_ensure_allowed_caps(decode))
 814         return gst_caps_new_empty();
 815
 816     return gst_caps_ref(decode->allowed_caps);
 817 }
 818
 819 static gboolean
 820 gst_vaapidecode_query(GST_PAD_QUERY_FUNCTION_ARGS)
 821 {
 822     GstVaapiDecode * const decode =
 823         GST_VAAPIDECODE(gst_pad_get_parent_element(pad));
 824     gboolean res;
 825
 826     GST_DEBUG("sharing display %p", decode->display);
 827
 828     if (gst_vaapi_reply_to_query(query, decode->display))
 829         res = TRUE;
 830     else if (GST_PAD_IS_SINK(pad)) {
 831         switch (GST_QUERY_TYPE(query)) {
 832 #if GST_CHECK_VERSION(1,0,0)
 833         case GST_QUERY_CAPS: {
 834             GstCaps * const caps = gst_vaapidecode_get_caps(pad);
 835             gst_query_set_caps_result(query, caps);
 836             gst_caps_unref(caps);
 837             res = TRUE;
 838             break;
 839         }
 840 #endif
 841         default:
 842             res = GST_PAD_QUERY_FUNCTION_CALL(decode->sinkpad_query,
 843                 decode->sinkpad, parent, query);
 844             break;
 845         }
 846     }
 847     else
 848         res = GST_PAD_QUERY_FUNCTION_CALL(decode->srcpad_query,
 849             decode->srcpad, parent, query);
 850
 851     gst_object_unref(decode);
 852     return res;
 853 }
 854
 855 static void
 856 gst_vaapidecode_init(GstVaapiDecode *decode)
 857 {
 858     GstVideoDecoder * const vdec = GST_VIDEO_DECODER(decode);
 859
 860     decode->display             = NULL;
 861     decode->decoder             = NULL;
 862     decode->decoder_caps        = NULL;
 863     decode->allowed_caps        = NULL;
 864     decode->render_time_base    = 0;
 865     decode->last_buffer_time    = 0;
 866
 867     g_mutex_init(&decode->decoder_mutex);
 868     g_cond_init(&decode->decoder_ready);
 869
 870     gst_video_decoder_set_packetized(vdec, FALSE);
 871
 872     /* Pad through which data comes in to the element */
 873     decode->sinkpad = GST_VIDEO_DECODER_SINK_PAD(vdec);
 874     decode->sinkpad_query = GST_PAD_QUERYFUNC(decode->sinkpad);
 875     gst_pad_set_query_function(decode->sinkpad, gst_vaapidecode_query);
 876 #if !GST_CHECK_VERSION(1,0,0)
 877     gst_pad_set_getcaps_function(decode->sinkpad, gst_vaapidecode_get_caps);
 878 #endif
 879
 880     /* Pad through which data goes out of the element */
 881     decode->srcpad = GST_VIDEO_DECODER_SRC_PAD(vdec);
 882     decode->srcpad_query = GST_PAD_QUERYFUNC(decode->srcpad);
 883     gst_pad_set_query_function(decode->srcpad, gst_vaapidecode_query);
 884 }