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     GstVideoCodecFrame *out_frame;
 280     GstFlowReturn ret;
 281 #if GST_CHECK_VERSION(1,0,0)
 282     const GstVaapiRectangle *crop_rect;
 283     GstVaapiVideoMeta *meta;
 284     guint flags;
 285 #endif
 286
 287     status = gst_vaapi_decoder_get_frame_with_timeout(decode->decoder,
 288         &out_frame, 100000);
 289     if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
 290         return GST_VIDEO_DECODER_FLOW_NEED_DATA;
 291
 292     if (!GST_VIDEO_CODEC_FRAME_IS_DECODE_ONLY(out_frame)) {
 293         proxy = gst_video_codec_frame_get_user_data(out_frame);
 294
 295         gst_vaapi_surface_proxy_set_destroy_notify(proxy,
 296             (GDestroyNotify)gst_vaapidecode_release, decode);
 297
 298 #if GST_CHECK_VERSION(1,0,0)
 299         ret = gst_video_decoder_allocate_output_frame(vdec, out_frame);
 300         if (ret != GST_FLOW_OK)
 301             goto error_create_buffer;
 302
 303         meta = gst_buffer_get_vaapi_video_meta(out_frame->output_buffer);
 304         if (!meta)
 305             goto error_get_meta;
 306         gst_vaapi_video_meta_set_surface_proxy(meta, proxy);
 307
 308         flags = gst_vaapi_surface_proxy_get_flags(proxy);
 309         if (flags & GST_VAAPI_SURFACE_PROXY_FLAG_INTERLACED) {
 310             guint out_flags = GST_VIDEO_BUFFER_FLAG_INTERLACED;
 311             if (flags & GST_VAAPI_SURFACE_PROXY_FLAG_TFF)
 312                 out_flags |= GST_VIDEO_BUFFER_FLAG_TFF;
 313             if (flags & GST_VAAPI_SURFACE_PROXY_FLAG_RFF)
 314                 out_flags |= GST_VIDEO_BUFFER_FLAG_RFF;
 315             if (flags & GST_VAAPI_SURFACE_PROXY_FLAG_ONEFIELD)
 316                 out_flags |= GST_VIDEO_BUFFER_FLAG_ONEFIELD;
 317             GST_BUFFER_FLAG_SET(out_frame->output_buffer, out_flags);
 318         }
 319
 320         crop_rect = gst_vaapi_surface_proxy_get_crop_rect(proxy);
 321         if (crop_rect) {
 322             GstVideoCropMeta * const crop_meta =
 323                 gst_buffer_add_video_crop_meta(out_frame->output_buffer);
 324             if (crop_meta) {
 325                 crop_meta->x = crop_rect->x;
 326                 crop_meta->y = crop_rect->y;
 327                 crop_meta->width = crop_rect->width;
 328                 crop_meta->height = crop_rect->height;
 329             }
 330         }
 331 #else
 332         out_frame->output_buffer =
 333             gst_vaapi_video_buffer_new_with_surface_proxy(proxy);
 334         if (!out_frame->output_buffer)
 335             goto error_create_buffer;
 336 #endif
 337     }
 338
 339     ret = gst_video_decoder_finish_frame(vdec, out_frame);
 340     if (ret != GST_FLOW_OK)
 341         goto error_commit_buffer;
 342
 343     /* Estimate when this frame would no longer be needed for rendering */
 344     if (GST_CLOCK_TIME_IS_VALID(out_frame->pts)) {
 345         if (!decode->render_time_base)
 346             decode->render_time_base = g_get_monotonic_time() -
 347                 GST_TIME_AS_USECONDS(out_frame->pts);
 348         decode->last_buffer_time = out_frame->pts;
 349         if (GST_CLOCK_TIME_IS_VALID(out_frame->duration))
 350             decode->last_buffer_time += out_frame->duration;
 351         else
 352             decode->last_buffer_time += GST_SECOND;
 353     }
 354     else {
 355         decode->render_time_base = 0;
 356         decode->last_buffer_time = 0;
 357     }
 358
 359     gst_video_codec_frame_unref(out_frame);
 360     return GST_FLOW_OK;
 361
 362     /* ERRORS */
 363 error_create_buffer:
 364     {
 365         const GstVaapiID surface_id =
 366             gst_vaapi_surface_get_id(GST_VAAPI_SURFACE_PROXY_SURFACE(proxy));
 367
 368         GST_ERROR("video sink failed to create video buffer for proxy'ed "
 369                   "surface %" GST_VAAPI_ID_FORMAT,
 370                   GST_VAAPI_ID_ARGS(surface_id));
 371         gst_video_decoder_drop_frame(vdec, out_frame);
 372         gst_video_codec_frame_unref(out_frame);
 373         return GST_FLOW_EOS;
 374     }
 375 #if GST_CHECK_VERSION(1,0,0)
 376 error_get_meta:
 377     {
 378         GST_ERROR("failed to get vaapi video meta attached to video buffer");
 379         gst_video_decoder_drop_frame(vdec, out_frame);
 380         gst_video_codec_frame_unref(out_frame);
 381         return GST_FLOW_EOS;
 382     }
 383 #endif
 384 error_commit_buffer:
 385     {
 386         if (ret != GST_FLOW_FLUSHING)
 387             GST_ERROR("video sink rejected the video buffer (error %d)", ret);
 388         gst_video_codec_frame_unref(out_frame);
 389         return GST_FLOW_EOS;
 390     }
 391 }
 392
 393 static GstFlowReturn
 394 gst_vaapidecode_handle_frame(GstVideoDecoder *vdec, GstVideoCodecFrame *frame)
 395 {
 396     GstFlowReturn ret;
 397
 398     /* Make sure to release the base class stream lock so that decode
 399        loop can call gst_video_decoder_finish_frame() without blocking */
 400     GST_VIDEO_DECODER_STREAM_UNLOCK(vdec);
 401     ret = gst_vaapidecode_decode_frame(vdec, frame);
 402     GST_VIDEO_DECODER_STREAM_LOCK(vdec);
 403     return ret;
 404 }
 405
 406 static void
 407 gst_vaapidecode_decode_loop(GstVaapiDecode *decode)
 408 {
 409     GstVideoDecoder * const vdec = GST_VIDEO_DECODER(decode);
 410     GstFlowReturn ret;
 411
 412     ret = gst_vaapidecode_push_decoded_frame(vdec);
 413     if (ret == GST_FLOW_OK || ret == GST_VIDEO_DECODER_FLOW_NEED_DATA)
 414         return;
 415
 416     /* ERRORS */
 417     gst_pad_pause_task(decode->srcpad);
 418 }
 419
 420 static GstFlowReturn
 421 gst_vaapidecode_finish(GstVideoDecoder *vdec)
 422 {
 423     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 424     GstVaapiDecoderStatus status;
 425
 426     status = gst_vaapi_decoder_flush(decode->decoder);
 427     if (status != GST_VAAPI_DECODER_STATUS_SUCCESS)
 428         goto error_flush;
 429
 430     /* Make sure the decode loop function has a chance to return, thus
 431        possibly unlocking gst_video_decoder_finish_frame() */
 432     GST_VIDEO_DECODER_STREAM_UNLOCK(vdec);
 433     gst_pad_stop_task(decode->srcpad);
 434     GST_VIDEO_DECODER_STREAM_LOCK(vdec);
 435
 436     /* Submit all frames that got decoded so far */
 437     while (gst_vaapidecode_push_decoded_frame(vdec) == GST_FLOW_OK)
 438         ;
 439     return GST_FLOW_OK;
 440
 441     /* ERRORS */
 442 error_flush:
 443     {
 444         GST_ERROR("failed to flush decoder (status %d)", status);
 445         return GST_FLOW_EOS;
 446     }
 447 }
 448
 449 #if GST_CHECK_VERSION(1,0,0)
 450 static gboolean
 451 gst_vaapidecode_decide_allocation(GstVideoDecoder *vdec, GstQuery *query)
 452 {
 453     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 454     GstCaps *caps = NULL;
 455     GstBufferPool *pool;
 456     GstStructure *config;
 457     GstVideoInfo vi;
 458     guint size, min, max;
 459     gboolean need_pool, update_pool;
 460
 461     gst_query_parse_allocation(query, &caps, &need_pool);
 462
 463     if (!caps)
 464         goto error_no_caps;
 465
 466     gst_video_info_init(&vi);
 467     gst_video_info_from_caps(&vi, caps);
 468     if (GST_VIDEO_INFO_FORMAT(&vi) == GST_VIDEO_FORMAT_ENCODED)
 469         gst_video_info_set_format(&vi, GST_VIDEO_FORMAT_NV12,
 470             GST_VIDEO_INFO_WIDTH(&vi), GST_VIDEO_INFO_HEIGHT(&vi));
 471
 472     g_return_val_if_fail(decode->display != NULL, FALSE);
 473
 474     if (gst_query_get_n_allocation_pools(query) > 0) {
 475         gst_query_parse_nth_allocation_pool(query, 0, &pool, &size, &min, &max);
 476         size = MAX(size, vi.size);
 477         update_pool = TRUE;
 478     }
 479     else {
 480         pool = NULL;
 481         size = vi.size;
 482         min = max = 0;
 483         update_pool = FALSE;
 484     }
 485
 486     if (!pool || !gst_buffer_pool_has_option(pool,
 487             GST_BUFFER_POOL_OPTION_VAAPI_VIDEO_META)) {
 488         GST_INFO("no pool or doesn't support GstVaapiVideoMeta, "
 489             "making new pool");
 490         pool = gst_vaapi_video_buffer_pool_new(decode->display);
 491         if (!pool)
 492             goto error_create_pool;
 493
 494         config = gst_buffer_pool_get_config(pool);
 495         gst_buffer_pool_config_set_params(config, caps, size, min, max);
 496         gst_buffer_pool_config_add_option(config,
 497             GST_BUFFER_POOL_OPTION_VAAPI_VIDEO_META);
 498         gst_buffer_pool_set_config(pool, config);
 499     }
 500
 501     if (update_pool)
 502         gst_query_set_nth_allocation_pool(query, 0, pool, size, min, max);
 503     else
 504         gst_query_add_allocation_pool(query, pool, size, min, max);
 505     if (pool)
 506         gst_object_unref(pool);
 507     return TRUE;
 508
 509     /* ERRORS */
 510 error_no_caps:
 511     {
 512         GST_ERROR("no caps specified");
 513         return FALSE;
 514     }
 515 error_create_pool:
 516     {
 517         GST_ERROR("failed to create buffer pool");
 518         return FALSE;
 519     }
 520 }
 521 #endif
 522
 523 static inline gboolean
 524 gst_vaapidecode_ensure_display(GstVaapiDecode *decode)
 525 {
 526     return gst_vaapi_ensure_display(decode, GST_VAAPI_DISPLAY_TYPE_ANY,
 527         &decode->display);
 528 }
 529
 530 static inline guint
 531 gst_vaapi_codec_from_caps(GstCaps *caps)
 532 {
 533     return gst_vaapi_profile_get_codec(gst_vaapi_profile_from_caps(caps));
 534 }
 535
 536 static gboolean
 537 gst_vaapidecode_create(GstVaapiDecode *decode, GstCaps *caps)
 538 {
 539     GstVaapiDisplay *dpy;
 540
 541     if (!gst_vaapidecode_ensure_display(decode))
 542         return FALSE;
 543     dpy = decode->display;
 544
 545     switch (gst_vaapi_codec_from_caps(caps)) {
 546     case GST_VAAPI_CODEC_MPEG2:
 547         decode->decoder = gst_vaapi_decoder_mpeg2_new(dpy, caps);
 548         break;
 549     case GST_VAAPI_CODEC_MPEG4:
 550     case GST_VAAPI_CODEC_H263:
 551         decode->decoder = gst_vaapi_decoder_mpeg4_new(dpy, caps);
 552         break;
 553     case GST_VAAPI_CODEC_H264:
 554         decode->decoder = gst_vaapi_decoder_h264_new(dpy, caps);
 555         break;
 556     case GST_VAAPI_CODEC_WMV3:
 557     case GST_VAAPI_CODEC_VC1:
 558         decode->decoder = gst_vaapi_decoder_vc1_new(dpy, caps);
 559         break;
 560 #if USE_JPEG_DECODER
 561     case GST_VAAPI_CODEC_JPEG:
 562         decode->decoder = gst_vaapi_decoder_jpeg_new(dpy, caps);
 563         break;
 564 #endif
 565     default:
 566         decode->decoder = NULL;
 567         break;
 568     }
 569     if (!decode->decoder)
 570         return FALSE;
 571
 572     gst_vaapi_decoder_set_codec_state_changed_func(decode->decoder,
 573         gst_vaapi_decoder_state_changed, decode);
 574
 575     decode->decoder_caps = gst_caps_ref(caps);
 576     return gst_pad_start_task(decode->srcpad,
 577         (GstTaskFunction)gst_vaapidecode_decode_loop, decode, NULL);
 578 }
 579
 580 static void
 581 gst_vaapidecode_destroy(GstVaapiDecode *decode)
 582 {
 583     gst_pad_stop_task(decode->srcpad);
 584     gst_vaapi_decoder_replace(&decode->decoder, NULL);
 585     gst_caps_replace(&decode->decoder_caps, NULL);
 586     gst_vaapidecode_release(decode);
 587 }
 588
 589 static gboolean
 590 gst_vaapidecode_reset_full(GstVaapiDecode *decode, GstCaps *caps, gboolean hard)
 591 {
 592     GstVaapiCodec codec;
 593
 594     /* Reset timers if hard reset was requested (e.g. seek) */
 595     if (hard) {
 596         decode->render_time_base = 0;
 597         decode->last_buffer_time = 0;
 598     }
 599
 600     /* Only reset decoder if codec type changed */
 601     else if (decode->decoder && decode->decoder_caps) {
 602         if (gst_caps_is_always_compatible(caps, decode->decoder_caps))
 603             return TRUE;
 604         codec = gst_vaapi_codec_from_caps(caps);
 605         if (codec == gst_vaapi_decoder_get_codec(decode->decoder))
 606             return TRUE;
 607     }
 608
 609     gst_vaapidecode_destroy(decode);
 610     return gst_vaapidecode_create(decode, caps);
 611 }
 612
 613 static void
 614 gst_vaapidecode_finalize(GObject *object)
 615 {
 616     GstVaapiDecode * const decode = GST_VAAPIDECODE(object);
 617
 618     gst_caps_replace(&decode->sinkpad_caps, NULL);
 619     gst_caps_replace(&decode->srcpad_caps,  NULL);
 620     gst_caps_replace(&decode->allowed_caps, NULL);
 621
 622     gst_vaapi_display_replace(&decode->display, NULL);
 623
 624     g_cond_clear(&decode->decoder_ready);
 625     g_mutex_clear(&decode->decoder_mutex);
 626
 627     G_OBJECT_CLASS(gst_vaapidecode_parent_class)->finalize(object);
 628 }
 629
 630 static gboolean
 631 gst_vaapidecode_open(GstVideoDecoder *vdec)
 632 {
 633     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 634     GstVaapiDisplay * const old_display = decode->display;
 635     gboolean success;
 636
 637     /* Let GstVideoContext ask for a proper display to its neighbours */
 638     /* Note: steal old display that may be allocated from get_caps()
 639        so that to retain a reference to it, thus avoiding extra
 640        initialization steps if we turn out to simply re-use the
 641        existing (cached) VA display */
 642     decode->display = NULL;
 643     success = gst_vaapidecode_ensure_display(decode);
 644     if (old_display)
 645         gst_vaapi_display_unref(old_display);
 646     return success;
 647 }
 648
 649 static gboolean
 650 gst_vaapidecode_close(GstVideoDecoder *vdec)
 651 {
 652     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 653
 654     gst_vaapidecode_destroy(decode);
 655     gst_vaapi_display_replace(&decode->display, NULL);
 656     return TRUE;
 657 }
 658
 659 static gboolean
 660 gst_vaapidecode_reset(GstVideoDecoder *vdec, gboolean hard)
 661 {
 662     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 663
 664     return gst_vaapidecode_reset_full(decode, decode->sinkpad_caps, hard);
 665 }
 666
 667 static gboolean
 668 gst_vaapidecode_set_format(GstVideoDecoder *vdec, GstVideoCodecState *state)
 669 {
 670     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 671
 672     if (!gst_vaapidecode_update_sink_caps(decode, state->caps))
 673         return FALSE;
 674     if (!gst_vaapidecode_update_src_caps(decode, state))
 675         return FALSE;
 676     if (!gst_vaapidecode_reset_full(decode, decode->sinkpad_caps, FALSE))
 677         return FALSE;
 678     return TRUE;
 679 }
 680
 681 static GstFlowReturn
 682 gst_vaapidecode_parse(GstVideoDecoder *vdec,
 683     GstVideoCodecFrame *frame, GstAdapter *adapter, gboolean at_eos)
 684 {
 685     GstVaapiDecode * const decode = GST_VAAPIDECODE(vdec);
 686     GstVaapiDecoderStatus status;
 687     GstFlowReturn ret;
 688     guint got_unit_size;
 689     gboolean got_frame;
 690
 691     status = gst_vaapi_decoder_parse(decode->decoder, frame,
 692         adapter, at_eos, &got_unit_size, &got_frame);
 693
 694     switch (status) {
 695     case GST_VAAPI_DECODER_STATUS_SUCCESS:
 696         if (got_unit_size > 0)
 697             gst_video_decoder_add_to_frame(vdec, got_unit_size);
 698         if (got_frame)
 699             ret = gst_video_decoder_have_frame(vdec);
 700         else
 701             ret = GST_FLOW_OK;
 702         break;
 703     case GST_VAAPI_DECODER_STATUS_ERROR_NO_DATA:
 704         ret = GST_VIDEO_DECODER_FLOW_NEED_DATA;
 705         break;
 706     case GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CODEC:
 707     case GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_PROFILE:
 708     case GST_VAAPI_DECODER_STATUS_ERROR_UNSUPPORTED_CHROMA_FORMAT:
 709         GST_WARNING("parse error %d", status);
 710         ret = GST_FLOW_NOT_SUPPORTED;
 711         break;
 712     default:
 713         GST_ERROR("parse error %d", status);
 714         ret = GST_FLOW_EOS;
 715         break;
 716     }
 717     return ret;
 718 }
 719
 720 static void
 721 gst_vaapidecode_class_init(GstVaapiDecodeClass *klass)
 722 {
 723     GObjectClass * const object_class = G_OBJECT_CLASS(klass);
 724     GstElementClass * const element_class = GST_ELEMENT_CLASS(klass);
 725     GstVideoDecoderClass * const vdec_class = GST_VIDEO_DECODER_CLASS(klass);
 726     GstPadTemplate *pad_template;
 727
 728     GST_DEBUG_CATEGORY_INIT(gst_debug_vaapidecode,
 729                             GST_PLUGIN_NAME, 0, GST_PLUGIN_DESC);
 730
 731     object_class->finalize   = gst_vaapidecode_finalize;
 732
 733     vdec_class->open         = GST_DEBUG_FUNCPTR(gst_vaapidecode_open);
 734     vdec_class->close        = GST_DEBUG_FUNCPTR(gst_vaapidecode_close);
 735     vdec_class->set_format   = GST_DEBUG_FUNCPTR(gst_vaapidecode_set_format);
 736     vdec_class->reset        = GST_DEBUG_FUNCPTR(gst_vaapidecode_reset);
 737     vdec_class->parse        = GST_DEBUG_FUNCPTR(gst_vaapidecode_parse);
 738     vdec_class->handle_frame = GST_DEBUG_FUNCPTR(gst_vaapidecode_handle_frame);
 739     vdec_class->finish       = GST_DEBUG_FUNCPTR(gst_vaapidecode_finish);
 740
 741 #if GST_CHECK_VERSION(1,0,0)
 742     vdec_class->decide_allocation =
 743         GST_DEBUG_FUNCPTR(gst_vaapidecode_decide_allocation);
 744 #endif
 745
 746     gst_element_class_set_static_metadata(element_class,
 747         "VA-API decoder",
 748         "Codec/Decoder/Video",
 749         GST_PLUGIN_DESC,
 750         "Gwenole Beauchesne <gwenole.beauchesne@intel.com>");
 751
 752     /* sink pad */
 753     pad_template = gst_static_pad_template_get(&gst_vaapidecode_sink_factory);
 754     gst_element_class_add_pad_template(element_class, pad_template);
 755
 756     /* src pad */
 757     pad_template = gst_static_pad_template_get(&gst_vaapidecode_src_factory);
 758     gst_element_class_add_pad_template(element_class, pad_template);
 759 }
 760
 761 static gboolean
 762 gst_vaapidecode_ensure_allowed_caps(GstVaapiDecode *decode)
 763 {
 764     GstCaps *decode_caps;
 765     guint i, n_decode_caps;
 766
 767     if (decode->allowed_caps)
 768         return TRUE;
 769
 770     if (!gst_vaapidecode_ensure_display(decode))
 771         goto error_no_display;
 772
 773     decode_caps = gst_vaapi_display_get_decode_caps(decode->display);
 774     if (!decode_caps)
 775         goto error_no_decode_caps;
 776     n_decode_caps = gst_caps_get_size(decode_caps);
 777
 778     decode->allowed_caps = gst_caps_new_empty();
 779     if (!decode->allowed_caps)
 780         goto error_no_memory;
 781
 782     for (i = 0; i < n_decode_caps; i++) {
 783         GstStructure *structure;
 784         structure = gst_caps_get_structure(decode_caps, i);
 785         if (!structure)
 786             continue;
 787         structure = gst_structure_copy(structure);
 788         if (!structure)
 789             continue;
 790         gst_structure_remove_field(structure, "profile");
 791         gst_structure_set(
 792             structure,
 793             "width",  GST_TYPE_INT_RANGE, 1, G_MAXINT,
 794             "height", GST_TYPE_INT_RANGE, 1, G_MAXINT,
 795             NULL
 796         );
 797         decode->allowed_caps =
 798             gst_caps_merge_structure(decode->allowed_caps, structure);
 799     }
 800
 801     gst_caps_unref(decode_caps);
 802     return TRUE;
 803
 804     /* ERRORS */
 805 error_no_display:
 806     {
 807         GST_ERROR("failed to retrieve VA display");
 808         return FALSE;
 809     }
 810 error_no_decode_caps:
 811     {
 812         GST_ERROR("failed to retrieve VA decode caps");
 813         return FALSE;
 814     }
 815 error_no_memory:
 816     {
 817         GST_ERROR("failed to allocate allowed-caps set");
 818         gst_caps_unref(decode_caps);
 819         return FALSE;
 820     }
 821 }
 822
 823 static GstCaps *
 824 gst_vaapidecode_get_caps(GstPad *pad)
 825 {
 826     GstVaapiDecode * const decode = GST_VAAPIDECODE(GST_OBJECT_PARENT(pad));
 827
 828     if (!gst_vaapidecode_ensure_allowed_caps(decode))
 829         return gst_caps_new_empty();
 830
 831     return gst_caps_ref(decode->allowed_caps);
 832 }
 833
 834 static gboolean
 835 gst_vaapidecode_query(GST_PAD_QUERY_FUNCTION_ARGS)
 836 {
 837     GstVaapiDecode * const decode =
 838         GST_VAAPIDECODE(gst_pad_get_parent_element(pad));
 839     gboolean res;
 840
 841     GST_DEBUG("sharing display %p", decode->display);
 842
 843     if (gst_vaapi_reply_to_query(query, decode->display))
 844         res = TRUE;
 845     else if (GST_PAD_IS_SINK(pad)) {
 846         switch (GST_QUERY_TYPE(query)) {
 847 #if GST_CHECK_VERSION(1,0,0)
 848         case GST_QUERY_CAPS: {
 849             GstCaps * const caps = gst_vaapidecode_get_caps(pad);
 850             gst_query_set_caps_result(query, caps);
 851             gst_caps_unref(caps);
 852             res = TRUE;
 853             break;
 854         }
 855 #endif
 856         default:
 857             res = GST_PAD_QUERY_FUNCTION_CALL(decode->sinkpad_query,
 858                 decode->sinkpad, parent, query);
 859             break;
 860         }
 861     }
 862     else
 863         res = GST_PAD_QUERY_FUNCTION_CALL(decode->srcpad_query,
 864             decode->srcpad, parent, query);
 865
 866     gst_object_unref(decode);
 867     return res;
 868 }
 869
 870 static void
 871 gst_vaapidecode_init(GstVaapiDecode *decode)
 872 {
 873     GstVideoDecoder * const vdec = GST_VIDEO_DECODER(decode);
 874
 875     decode->display             = NULL;
 876     decode->decoder             = NULL;
 877     decode->decoder_caps        = NULL;
 878     decode->allowed_caps        = NULL;
 879     decode->render_time_base    = 0;
 880     decode->last_buffer_time    = 0;
 881
 882     g_mutex_init(&decode->decoder_mutex);
 883     g_cond_init(&decode->decoder_ready);
 884
 885     gst_video_decoder_set_packetized(vdec, FALSE);
 886
 887     /* Pad through which data comes in to the element */
 888     decode->sinkpad = GST_VIDEO_DECODER_SINK_PAD(vdec);
 889     decode->sinkpad_query = GST_PAD_QUERYFUNC(decode->sinkpad);
 890     gst_pad_set_query_function(decode->sinkpad, gst_vaapidecode_query);
 891 #if !GST_CHECK_VERSION(1,0,0)
 892     gst_pad_set_getcaps_function(decode->sinkpad, gst_vaapidecode_get_caps);
 893 #endif
 894
 895     /* Pad through which data goes out of the element */
 896     decode->srcpad = GST_VIDEO_DECODER_SRC_PAD(vdec);
 897     decode->srcpad_query = GST_PAD_QUERYFUNC(decode->srcpad);
 898     gst_pad_set_query_function(decode->srcpad, gst_vaapidecode_query);
 899 }