git.sesse.net Git - vlc/blob - modules/codec/omxil/android_mediacodec.c

   1 /*****************************************************************************
   2  * android_mediacodec.c: Video decoder module using the Android MediaCodec API
   3  *****************************************************************************
   4  * Copyright (C) 2012 Martin Storsjo
   5  *
   6  * Authors: Martin Storsjo <martin@martin.st>
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU Lesser General Public License as published by
  10  * the Free Software Foundation; either version 2.1 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public License
  19  * along with this program; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  21  *****************************************************************************/
  22
  23 /*****************************************************************************
  24  * Preamble
  25  *****************************************************************************/
  26 #ifdef HAVE_CONFIG_H
  27 # include "config.h"
  28 #endif
  29
  30 #include <jni.h>
  31 #include <stdint.h>
  32
  33 #include <vlc_common.h>
  34 #include <vlc_plugin.h>
  35 #include <vlc_codec.h>
  36 #include <vlc_block_helper.h>
  37 #include <vlc_cpu.h>
  38
  39 #include "../h264_nal.h"
  40 #include "../hevc_nal.h"
  41 #include <OMX_Core.h>
  42 #include <OMX_Component.h>
  43 #include "omxil_utils.h"
  44 #include "android_opaque.h"
  45 #include "../../video_output/android/android_window.h"
  46
  47 #define INFO_OUTPUT_BUFFERS_CHANGED -3
  48 #define INFO_OUTPUT_FORMAT_CHANGED  -2
  49 #define INFO_TRY_AGAIN_LATER        -1
  50
  51 #define THREAD_NAME "android_mediacodec"
  52
  53 extern int jni_attach_thread(JNIEnv **env, const char *thread_name);
  54 extern void jni_detach_thread();
  55 /* JNI functions to get/set an Android Surface object. */
  56 extern jobject jni_LockAndGetAndroidJavaSurface();
  57 extern void jni_UnlockAndroidSurface();
  58 extern void jni_EventHardwareAccelerationError();
  59 extern bool jni_IsVideoPlayerActivityCreated();
  60
  61 /* Implementation of a circular buffer of timestamps with overwriting
  62  * of older values. MediaCodec has only one type of timestamp, if a
  63  * block has no PTS, we send the DTS instead. Some hardware decoders
  64  * cannot cope with this situation and output the frames in the wrong
  65  * order. As a workaround in this case, we use a FIFO of timestamps in
  66  * order to remember which input packets had no PTS.  Since an
  67  * hardware decoder can silently drop frames, this might cause a
  68  * growing desynchronization with the actual timestamp. Thus the
  69  * circular buffer has a limited size and will overwrite older values.
  70  */
  71 typedef struct
  72 {
  73     uint32_t          begin;
  74     uint32_t          size;
  75     uint32_t          capacity;
  76     int64_t           *buffer;
  77 } timestamp_fifo_t;
  78
  79 static timestamp_fifo_t *timestamp_FifoNew(uint32_t capacity)
  80 {
  81     timestamp_fifo_t *fifo = calloc(1, sizeof(*fifo));
  82     if (!fifo)
  83         return NULL;
  84     fifo->buffer = malloc(capacity * sizeof(*fifo->buffer));
  85     if (!fifo->buffer) {
  86         free(fifo);
  87         return NULL;
  88     }
  89     fifo->capacity = capacity;
  90     return fifo;
  91 }
  92
  93 static void timestamp_FifoRelease(timestamp_fifo_t *fifo)
  94 {
  95     free(fifo->buffer);
  96     free(fifo);
  97 }
  98
  99 static bool timestamp_FifoIsEmpty(timestamp_fifo_t *fifo)
 100 {
 101     return fifo->size == 0;
 102 }
 103
 104 static bool timestamp_FifoIsFull(timestamp_fifo_t *fifo)
 105 {
 106     return fifo->size == fifo->capacity;
 107 }
 108
 109 static void timestamp_FifoEmpty(timestamp_fifo_t *fifo)
 110 {
 111     fifo->size = 0;
 112 }
 113
 114 static void timestamp_FifoPut(timestamp_fifo_t *fifo, int64_t ts)
 115 {
 116     uint32_t end = (fifo->begin + fifo->size) % fifo->capacity;
 117     fifo->buffer[end] = ts;
 118     if (!timestamp_FifoIsFull(fifo))
 119         fifo->size += 1;
 120     else
 121         fifo->begin = (fifo->begin + 1) % fifo->capacity;
 122 }
 123
 124 static int64_t timestamp_FifoGet(timestamp_fifo_t *fifo)
 125 {
 126     if (timestamp_FifoIsEmpty(fifo))
 127         return VLC_TS_INVALID;
 128
 129     int64_t result = fifo->buffer[fifo->begin];
 130     fifo->begin = (fifo->begin + 1) % fifo->capacity;
 131     fifo->size -= 1;
 132     return result;
 133 }
 134
 135 struct decoder_sys_t
 136 {
 137     jclass media_codec_list_class, media_codec_class, media_format_class;
 138     jclass buffer_info_class, byte_buffer_class;
 139     jmethodID tostring;
 140     jmethodID get_codec_count, get_codec_info_at, is_encoder, get_capabilities_for_type;
 141     jfieldID profile_levels_field, profile_field, level_field;
 142     jmethodID get_supported_types, get_name;
 143     jmethodID create_by_codec_name, configure, start, stop, flush, release;
 144     jmethodID get_output_format;
 145     jmethodID get_input_buffers, get_input_buffer;
 146     jmethodID get_output_buffers, get_output_buffer;
 147     jmethodID dequeue_input_buffer, dequeue_output_buffer, queue_input_buffer;
 148     jmethodID release_output_buffer;
 149     jmethodID create_video_format, set_integer, set_bytebuffer, get_integer;
 150     jmethodID buffer_info_ctor;
 151     jmethodID allocate_direct, limit;
 152     jfieldID size_field, offset_field, pts_field;
 153
 154     uint32_t nal_size;
 155
 156     jobject codec;
 157     jobject buffer_info;
 158     jobject input_buffers, output_buffers;
 159     int pixel_format;
 160     int stride, slice_height;
 161     char *name;
 162
 163     bool allocated;
 164     bool started;
 165     bool decoded;
 166     bool error_state;
 167     bool error_event_sent;
 168
 169     ArchitectureSpecificCopyData architecture_specific_data;
 170
 171     /* Direct rendering members. */
 172     bool direct_rendering;
 173     picture_t** pp_inflight_pictures; /**< stores the inflight picture for each output buffer or NULL */
 174     unsigned int i_inflight_pictures;
 175
 176     timestamp_fifo_t *timestamp_fifo;
 177 };
 178
 179 enum Types
 180 {
 181     METHOD, STATIC_METHOD, FIELD
 182 };
 183
 184 #define OFF(x) offsetof(struct decoder_sys_t, x)
 185 struct classname
 186 {
 187     const char *name;
 188     int offset;
 189 };
 190 static const struct classname classes[] = {
 191     { "android/media/MediaCodecList", OFF(media_codec_list_class) },
 192     { "android/media/MediaCodec", OFF(media_codec_class) },
 193     { "android/media/MediaFormat", OFF(media_format_class) },
 194     { "android/media/MediaFormat", OFF(media_format_class) },
 195     { "android/media/MediaCodec$BufferInfo", OFF(buffer_info_class) },
 196     { "java/nio/ByteBuffer", OFF(byte_buffer_class) },
 197     { NULL, 0 },
 198 };
 199
 200 struct member
 201 {
 202     const char *name;
 203     const char *sig;
 204     const char *class;
 205     int offset;
 206     int type;
 207     bool critical;
 208 };
 209 static const struct member members[] = {
 210     { "toString", "()Ljava/lang/String;", "java/lang/Object", OFF(tostring), METHOD, true },
 211
 212     { "getCodecCount", "()I", "android/media/MediaCodecList", OFF(get_codec_count), STATIC_METHOD, true },
 213     { "getCodecInfoAt", "(I)Landroid/media/MediaCodecInfo;", "android/media/MediaCodecList", OFF(get_codec_info_at), STATIC_METHOD, true },
 214
 215     { "isEncoder", "()Z", "android/media/MediaCodecInfo", OFF(is_encoder), METHOD, true },
 216     { "getSupportedTypes", "()[Ljava/lang/String;", "android/media/MediaCodecInfo", OFF(get_supported_types), METHOD, true },
 217     { "getName", "()Ljava/lang/String;", "android/media/MediaCodecInfo", OFF(get_name), METHOD, true },
 218     { "getCapabilitiesForType", "(Ljava/lang/String;)Landroid/media/MediaCodecInfo$CodecCapabilities;", "android/media/MediaCodecInfo", OFF(get_capabilities_for_type), METHOD, true },
 219
 220     { "profileLevels", "[Landroid/media/MediaCodecInfo$CodecProfileLevel;", "android/media/MediaCodecInfo$CodecCapabilities", OFF(profile_levels_field), FIELD, true },
 221     { "profile", "I", "android/media/MediaCodecInfo$CodecProfileLevel", OFF(profile_field), FIELD, true },
 222     { "level", "I", "android/media/MediaCodecInfo$CodecProfileLevel", OFF(level_field), FIELD, true },
 223
 224     { "createByCodecName", "(Ljava/lang/String;)Landroid/media/MediaCodec;", "android/media/MediaCodec", OFF(create_by_codec_name), STATIC_METHOD, true },
 225     { "configure", "(Landroid/media/MediaFormat;Landroid/view/Surface;Landroid/media/MediaCrypto;I)V", "android/media/MediaCodec", OFF(configure), METHOD, true },
 226     { "start", "()V", "android/media/MediaCodec", OFF(start), METHOD, true },
 227     { "stop", "()V", "android/media/MediaCodec", OFF(stop), METHOD, true },
 228     { "flush", "()V", "android/media/MediaCodec", OFF(flush), METHOD, true },
 229     { "release", "()V", "android/media/MediaCodec", OFF(release), METHOD, true },
 230     { "getOutputFormat", "()Landroid/media/MediaFormat;", "android/media/MediaCodec", OFF(get_output_format), METHOD, true },
 231     { "getInputBuffers", "()[Ljava/nio/ByteBuffer;", "android/media/MediaCodec", OFF(get_input_buffers), METHOD, false },
 232     { "getInputBuffer", "(I)Ljava/nio/ByteBuffer;", "android/media/MediaCodec", OFF(get_input_buffer), METHOD, false },
 233     { "getOutputBuffers", "()[Ljava/nio/ByteBuffer;", "android/media/MediaCodec", OFF(get_output_buffers), METHOD, false },
 234     { "getOutputBuffer", "(I)Ljava/nio/ByteBuffer;", "android/media/MediaCodec", OFF(get_output_buffer), METHOD, false },
 235     { "dequeueInputBuffer", "(J)I", "android/media/MediaCodec", OFF(dequeue_input_buffer), METHOD, true },
 236     { "dequeueOutputBuffer", "(Landroid/media/MediaCodec$BufferInfo;J)I", "android/media/MediaCodec", OFF(dequeue_output_buffer), METHOD, true },
 237     { "queueInputBuffer", "(IIIJI)V", "android/media/MediaCodec", OFF(queue_input_buffer), METHOD, true },
 238     { "releaseOutputBuffer", "(IZ)V", "android/media/MediaCodec", OFF(release_output_buffer), METHOD, true },
 239
 240     { "createVideoFormat", "(Ljava/lang/String;II)Landroid/media/MediaFormat;", "android/media/MediaFormat", OFF(create_video_format), STATIC_METHOD, true },
 241     { "setInteger", "(Ljava/lang/String;I)V", "android/media/MediaFormat", OFF(set_integer), METHOD, true },
 242     { "getInteger", "(Ljava/lang/String;)I", "android/media/MediaFormat", OFF(get_integer), METHOD, true },
 243     { "setByteBuffer", "(Ljava/lang/String;Ljava/nio/ByteBuffer;)V", "android/media/MediaFormat", OFF(set_bytebuffer), METHOD, true },
 244
 245     { "<init>", "()V", "android/media/MediaCodec$BufferInfo", OFF(buffer_info_ctor), METHOD, true },
 246     { "size", "I", "android/media/MediaCodec$BufferInfo", OFF(size_field), FIELD, true },
 247     { "offset", "I", "android/media/MediaCodec$BufferInfo", OFF(offset_field), FIELD, true },
 248     { "presentationTimeUs", "J", "android/media/MediaCodec$BufferInfo", OFF(pts_field), FIELD, true },
 249
 250     { "allocateDirect", "(I)Ljava/nio/ByteBuffer;", "java/nio/ByteBuffer", OFF(allocate_direct), STATIC_METHOD, true },
 251     { "limit", "(I)Ljava/nio/Buffer;", "java/nio/ByteBuffer", OFF(limit), METHOD, true },
 252
 253     { NULL, NULL, NULL, 0, 0, false },
 254 };
 255
 256 #define GET_INTEGER(obj, name) (*env)->CallIntMethod(env, obj, p_sys->get_integer, (*env)->NewStringUTF(env, name))
 257
 258 /*****************************************************************************
 259  * Local prototypes
 260  *****************************************************************************/
 261 static int  OpenDecoder(vlc_object_t *);
 262 static void CloseDecoder(vlc_object_t *);
 263
 264 static picture_t *DecodeVideo(decoder_t *, block_t **);
 265
 266 static void InvalidateAllPictures(decoder_t *);
 267 static int InsertInflightPicture(decoder_t *, picture_t *, unsigned int );
 268
 269 /*****************************************************************************
 270  * Module descriptor
 271  *****************************************************************************/
 272 #define DIRECTRENDERING_TEXT N_("Android direct rendering")
 273 #define DIRECTRENDERING_LONGTEXT N_(\
 274         "Enable Android direct rendering using opaque buffers.")
 275
 276 #define CFG_PREFIX "mediacodec-"
 277
 278 vlc_module_begin ()
 279     set_description( N_("Video decoder using Android MediaCodec") )
 280     set_category( CAT_INPUT )
 281     set_subcategory( SUBCAT_INPUT_VCODEC )
 282     set_section( N_("Decoding") , NULL )
 283     set_capability( "decoder", 0 ) /* Only enabled via commandline arguments */
 284     add_bool(CFG_PREFIX "dr", true,
 285              DIRECTRENDERING_TEXT, DIRECTRENDERING_LONGTEXT, true)
 286     set_callbacks( OpenDecoder, CloseDecoder )
 287 vlc_module_end ()
 288
 289 static int jstrcmp(JNIEnv* env, jobject str, const char* str2)
 290 {
 291     jsize len = (*env)->GetStringUTFLength(env, str);
 292     if (len != (jsize) strlen(str2))
 293         return -1;
 294     const char *ptr = (*env)->GetStringUTFChars(env, str, NULL);
 295     int ret = memcmp(ptr, str2, len);
 296     (*env)->ReleaseStringUTFChars(env, str, ptr);
 297     return ret;
 298 }
 299
 300 static inline bool check_exception( JNIEnv *env )
 301 {
 302     if ((*env)->ExceptionOccurred(env)) {
 303         (*env)->ExceptionClear(env);
 304         return true;
 305     }
 306     else
 307         return false;
 308 }
 309 #define CHECK_EXCEPTION() check_exception( env )
 310
 311 /*****************************************************************************
 312  * OpenDecoder: Create the decoder instance
 313  *****************************************************************************/
 314 static int OpenDecoder(vlc_object_t *p_this)
 315 {
 316     decoder_t *p_dec = (decoder_t*)p_this;
 317     decoder_sys_t *p_sys;
 318
 319     if (p_dec->fmt_in.i_cat != VIDEO_ES && !p_dec->b_force)
 320         return VLC_EGENERIC;
 321
 322     const char *mime = NULL;
 323     switch (p_dec->fmt_in.i_codec) {
 324     case VLC_CODEC_HEVC: mime = "video/hevc"; break;
 325     case VLC_CODEC_H264: mime = "video/avc"; break;
 326     case VLC_CODEC_H263: mime = "video/3gpp"; break;
 327     case VLC_CODEC_MP4V: mime = "video/mp4v-es"; break;
 328     case VLC_CODEC_WMV3: mime = "video/x-ms-wmv"; break;
 329     case VLC_CODEC_VC1:  mime = "video/wvc1"; break;
 330     case VLC_CODEC_VP8:  mime = "video/x-vnd.on2.vp8"; break;
 331     case VLC_CODEC_VP9:  mime = "video/x-vnd.on2.vp9"; break;
 332     default:
 333         msg_Dbg(p_dec, "codec %4.4s not supported", (char *)&p_dec->fmt_in.i_codec);
 334         return VLC_EGENERIC;
 335     }
 336
 337     size_t fmt_profile = 0;
 338     if (p_dec->fmt_in.i_codec == VLC_CODEC_H264)
 339         h264_get_profile_level(&p_dec->fmt_in, &fmt_profile, NULL, NULL);
 340
 341     /* Allocate the memory needed to store the decoder's structure */
 342     if ((p_dec->p_sys = p_sys = calloc(1, sizeof(*p_sys))) == NULL)
 343         return VLC_ENOMEM;
 344
 345     p_dec->pf_decode_video = DecodeVideo;
 346
 347     p_dec->fmt_out.i_cat = p_dec->fmt_in.i_cat;
 348     p_dec->fmt_out.video = p_dec->fmt_in.video;
 349     p_dec->fmt_out.audio = p_dec->fmt_in.audio;
 350     p_dec->b_need_packetized = true;
 351
 352     JNIEnv* env = NULL;
 353     jni_attach_thread(&env, THREAD_NAME);
 354
 355     for (int i = 0; classes[i].name; i++) {
 356         *(jclass*)((uint8_t*)p_sys + classes[i].offset) =
 357             (*env)->FindClass(env, classes[i].name);
 358
 359         if (CHECK_EXCEPTION()) {
 360             msg_Warn(p_dec, "Unable to find class %s", classes[i].name);
 361             goto error;
 362         }
 363     }
 364
 365     jclass last_class;
 366     for (int i = 0; members[i].name; i++) {
 367         if (i == 0 || strcmp(members[i].class, members[i - 1].class))
 368             last_class = (*env)->FindClass(env, members[i].class);
 369
 370         if (CHECK_EXCEPTION()) {
 371             msg_Warn(p_dec, "Unable to find class %s", members[i].class);
 372             goto error;
 373         }
 374
 375         switch (members[i].type) {
 376         case METHOD:
 377             *(jmethodID*)((uint8_t*)p_sys + members[i].offset) =
 378                 (*env)->GetMethodID(env, last_class, members[i].name, members[i].sig);
 379             break;
 380         case STATIC_METHOD:
 381             *(jmethodID*)((uint8_t*)p_sys + members[i].offset) =
 382                 (*env)->GetStaticMethodID(env, last_class, members[i].name, members[i].sig);
 383             break;
 384         case FIELD:
 385             *(jfieldID*)((uint8_t*)p_sys + members[i].offset) =
 386                 (*env)->GetFieldID(env, last_class, members[i].name, members[i].sig);
 387             break;
 388         }
 389         if (CHECK_EXCEPTION()) {
 390             msg_Warn(p_dec, "Unable to find the member %s in %s",
 391                      members[i].name, members[i].class);
 392             if (members[i].critical)
 393                 goto error;
 394         }
 395     }
 396     /* getInputBuffers and getOutputBuffers are deprecated if API >= 21
 397      * use getInputBuffer and getOutputBuffer instead. */
 398     if (p_sys->get_input_buffer && p_sys->get_output_buffer) {
 399         p_sys->get_output_buffers =
 400         p_sys->get_input_buffers = NULL;
 401     } else if (!p_sys->get_output_buffers && !p_sys->get_input_buffers) {
 402         msg_Warn(p_dec, "Unable to find get Output/Input Buffer/Buffers");
 403         goto error;
 404     }
 405
 406     int num_codecs = (*env)->CallStaticIntMethod(env, p_sys->media_codec_list_class,
 407                                                  p_sys->get_codec_count);
 408     jobject codec_name = NULL;
 409
 410     for (int i = 0; i < num_codecs; i++) {
 411         jobject codec_capabilities = NULL;
 412         jobject profile_levels = NULL;
 413         jobject info = NULL;
 414         jobject name = NULL;
 415         jobject types = NULL;
 416         jsize name_len = 0;
 417         int profile_levels_len = 0, num_types = 0;
 418         const char *name_ptr = NULL;
 419         bool found = false;
 420
 421         info = (*env)->CallStaticObjectMethod(env, p_sys->media_codec_list_class,
 422                                               p_sys->get_codec_info_at, i);
 423         if ((*env)->CallBooleanMethod(env, info, p_sys->is_encoder))
 424             goto loopclean;
 425
 426         codec_capabilities = (*env)->CallObjectMethod(env, info, p_sys->get_capabilities_for_type,
 427                                                       (*env)->NewStringUTF(env, mime));
 428         if (CHECK_EXCEPTION()) {
 429             msg_Warn(p_dec, "Exception occurred in MediaCodecInfo.getCapabilitiesForType");
 430             goto loopclean;
 431         } else if (codec_capabilities) {
 432             profile_levels = (*env)->GetObjectField(env, codec_capabilities, p_sys->profile_levels_field);
 433             if (profile_levels)
 434                 profile_levels_len = (*env)->GetArrayLength(env, profile_levels);
 435         }
 436         msg_Dbg(p_dec, "Number of profile levels: %d", profile_levels_len);
 437
 438         types = (*env)->CallObjectMethod(env, info, p_sys->get_supported_types);
 439         num_types = (*env)->GetArrayLength(env, types);
 440         name = (*env)->CallObjectMethod(env, info, p_sys->get_name);
 441         name_len = (*env)->GetStringUTFLength(env, name);
 442         name_ptr = (*env)->GetStringUTFChars(env, name, NULL);
 443         found = false;
 444
 445         if (!strncmp(name_ptr, "OMX.google.", __MIN(11, name_len)))
 446             goto loopclean;
 447         for (int j = 0; j < num_types && !found; j++) {
 448             jobject type = (*env)->GetObjectArrayElement(env, types, j);
 449             if (!jstrcmp(env, type, mime)) {
 450                 /* The mime type is matching for this component. We
 451                    now check if the capabilities of the codec is
 452                    matching the video format. */
 453                 if (p_dec->fmt_in.i_codec == VLC_CODEC_H264 && fmt_profile) {
 454                     /* This decoder doesn't expose its profiles and is high
 455                      * profile capable */
 456                     if (!strncmp(name_ptr, "OMX.LUMEVideoDecoder", __MIN(20, name_len)))
 457                         found = true;
 458
 459                     for (int i = 0; i < profile_levels_len && !found; ++i) {
 460                         jobject profile_level = (*env)->GetObjectArrayElement(env, profile_levels, i);
 461
 462                         int omx_profile = (*env)->GetIntField(env, profile_level, p_sys->profile_field);
 463                         size_t codec_profile = convert_omx_to_profile_idc(omx_profile);
 464                         (*env)->DeleteLocalRef(env, profile_level);
 465                         if (codec_profile != fmt_profile)
 466                             continue;
 467                         /* Some encoders set the level too high, thus we ignore it for the moment.
 468                            We could try to guess the actual profile based on the resolution. */
 469                         found = true;
 470                     }
 471                 }
 472                 else
 473                     found = true;
 474             }
 475             (*env)->DeleteLocalRef(env, type);
 476         }
 477         if (found) {
 478             msg_Dbg(p_dec, "using %.*s", name_len, name_ptr);
 479             p_sys->name = malloc(name_len + 1);
 480             memcpy(p_sys->name, name_ptr, name_len);
 481             p_sys->name[name_len] = '\0';
 482             codec_name = name;
 483         }
 484 loopclean:
 485         if (name)
 486             (*env)->ReleaseStringUTFChars(env, name, name_ptr);
 487         if (profile_levels)
 488             (*env)->DeleteLocalRef(env, profile_levels);
 489         if (types)
 490             (*env)->DeleteLocalRef(env, types);
 491         if (codec_capabilities)
 492             (*env)->DeleteLocalRef(env, codec_capabilities);
 493         if (info)
 494             (*env)->DeleteLocalRef(env, info);
 495         if (found)
 496             break;
 497     }
 498
 499     if (!codec_name) {
 500         msg_Dbg(p_dec, "No suitable codec matching %s was found", mime);
 501         goto error;
 502     }
 503
 504     // This method doesn't handle errors nicely, it crashes if the codec isn't found.
 505     // (The same goes for createDecoderByType.) This is fixed in latest AOSP and in 4.2,
 506     // but not in 4.1 devices.
 507     p_sys->codec = (*env)->CallStaticObjectMethod(env, p_sys->media_codec_class,
 508                                                   p_sys->create_by_codec_name, codec_name);
 509     if (CHECK_EXCEPTION()) {
 510         msg_Warn(p_dec, "Exception occurred in MediaCodec.createByCodecName.");
 511         goto error;
 512     }
 513     p_sys->allocated = true;
 514     p_sys->codec = (*env)->NewGlobalRef(env, p_sys->codec);
 515
 516     jobject format = (*env)->CallStaticObjectMethod(env, p_sys->media_format_class,
 517                          p_sys->create_video_format, (*env)->NewStringUTF(env, mime),
 518                          p_dec->fmt_in.video.i_width, p_dec->fmt_in.video.i_height);
 519
 520     if (p_dec->fmt_in.i_extra) {
 521         // Allocate a byte buffer via allocateDirect in java instead of NewDirectByteBuffer,
 522         // since the latter doesn't allocate storage of its own, and we don't know how long
 523         // the codec uses the buffer.
 524         int buf_size = p_dec->fmt_in.i_extra + 20;
 525         jobject bytebuf = (*env)->CallStaticObjectMethod(env, p_sys->byte_buffer_class,
 526                                                          p_sys->allocate_direct, buf_size);
 527         uint32_t size = p_dec->fmt_in.i_extra;
 528         uint8_t *ptr = (*env)->GetDirectBufferAddress(env, bytebuf);
 529         if (p_dec->fmt_in.i_codec == VLC_CODEC_H264 && ((uint8_t*)p_dec->fmt_in.p_extra)[0] == 1) {
 530             convert_sps_pps(p_dec, p_dec->fmt_in.p_extra, p_dec->fmt_in.i_extra,
 531                             ptr, buf_size,
 532                             &size, &p_sys->nal_size);
 533         } else if (p_dec->fmt_in.i_codec == VLC_CODEC_HEVC) {
 534             convert_hevc_nal_units(p_dec, p_dec->fmt_in.p_extra,
 535                                    p_dec->fmt_in.i_extra, ptr, buf_size,
 536                                    &size, &p_sys->nal_size);
 537         } else {
 538             memcpy(ptr, p_dec->fmt_in.p_extra, size);
 539         }
 540         (*env)->CallObjectMethod(env, bytebuf, p_sys->limit, size);
 541         (*env)->CallVoidMethod(env, format, p_sys->set_bytebuffer,
 542                                (*env)->NewStringUTF(env, "csd-0"), bytebuf);
 543         (*env)->DeleteLocalRef(env, bytebuf);
 544     }
 545
 546     /* If the VideoPlayerActivity is not started, MediaCodec opaque
 547        direct rendering should be disabled since no surface will be
 548        attached to the JNI. */
 549     p_sys->direct_rendering = jni_IsVideoPlayerActivityCreated() && var_InheritBool(p_dec, CFG_PREFIX "dr");
 550
 551     /* There is no way to rotate the video using direct rendering (and using a
 552      * SurfaceView) before  API 21 (Lollipop). Therefore, we deactivate direct
 553      * rendering if video doesn't have a normal rotation and if
 554      * get_input_buffer method is not present (This method exists since API
 555      * 21). */
 556     if (p_sys->direct_rendering
 557         && p_dec->fmt_in.video.orientation != ORIENT_NORMAL
 558         && !p_sys->get_input_buffer)
 559         p_sys->direct_rendering = false;
 560
 561     if (p_sys->direct_rendering) {
 562         if (p_dec->fmt_in.video.orientation != ORIENT_NORMAL) {
 563             int i_angle;
 564
 565             switch (p_dec->fmt_in.video.orientation) {
 566                 case ORIENT_ROTATED_90:
 567                     i_angle = 90;
 568                     break;
 569                 case ORIENT_ROTATED_180:
 570                     i_angle = 180;
 571                     break;
 572                 case ORIENT_ROTATED_270:
 573                     i_angle = 270;
 574                     break;
 575                 default:
 576                     i_angle = 0;
 577             }
 578             (*env)->CallVoidMethod(env, format, p_sys->set_integer,
 579                                    (*env)->NewStringUTF(env, "rotation-degrees"),
 580                                    i_angle);
 581         }
 582
 583         jobject surf = jni_LockAndGetAndroidJavaSurface();
 584         if (surf) {
 585             // Configure MediaCodec with the Android surface.
 586             (*env)->CallVoidMethod(env, p_sys->codec, p_sys->configure, format, surf, NULL, 0);
 587             if (CHECK_EXCEPTION()) {
 588                 msg_Warn(p_dec, "Exception occurred in MediaCodec.configure with an output surface.");
 589                 jni_UnlockAndroidSurface();
 590                 goto error;
 591             }
 592             p_dec->fmt_out.i_codec = VLC_CODEC_ANDROID_OPAQUE;
 593         } else {
 594             msg_Warn(p_dec, "Failed to get the Android Surface, disabling direct rendering.");
 595             p_sys->direct_rendering = false;
 596         }
 597         jni_UnlockAndroidSurface();
 598     }
 599     if (!p_sys->direct_rendering) {
 600         (*env)->CallVoidMethod(env, p_sys->codec, p_sys->configure, format, NULL, NULL, 0);
 601         if (CHECK_EXCEPTION()) {
 602             msg_Warn(p_dec, "Exception occurred in MediaCodec.configure");
 603             goto error;
 604         }
 605     }
 606
 607     (*env)->CallVoidMethod(env, p_sys->codec, p_sys->start);
 608     if (CHECK_EXCEPTION()) {
 609         msg_Warn(p_dec, "Exception occurred in MediaCodec.start");
 610         goto error;
 611     }
 612     p_sys->started = true;
 613
 614     if (p_sys->get_input_buffers && p_sys->get_output_buffers) {
 615         p_sys->input_buffers = (*env)->CallObjectMethod(env, p_sys->codec, p_sys->get_input_buffers);
 616         p_sys->output_buffers = (*env)->CallObjectMethod(env, p_sys->codec, p_sys->get_output_buffers);
 617         p_sys->input_buffers = (*env)->NewGlobalRef(env, p_sys->input_buffers);
 618         p_sys->output_buffers = (*env)->NewGlobalRef(env, p_sys->output_buffers);
 619     }
 620     p_sys->buffer_info = (*env)->NewObject(env, p_sys->buffer_info_class, p_sys->buffer_info_ctor);
 621     p_sys->buffer_info = (*env)->NewGlobalRef(env, p_sys->buffer_info);
 622     (*env)->DeleteLocalRef(env, format);
 623
 624     jni_detach_thread();
 625
 626     const int timestamp_fifo_size = 32;
 627     p_sys->timestamp_fifo = timestamp_FifoNew(timestamp_fifo_size);
 628     if (!p_sys->timestamp_fifo)
 629         goto error;
 630
 631     return VLC_SUCCESS;
 632
 633  error:
 634     jni_detach_thread();
 635     CloseDecoder(p_this);
 636     return VLC_EGENERIC;
 637 }
 638
 639 static void CloseDecoder(vlc_object_t *p_this)
 640 {
 641     decoder_t *p_dec = (decoder_t *)p_this;
 642     decoder_sys_t *p_sys = p_dec->p_sys;
 643     JNIEnv *env = NULL;
 644
 645     if (!p_sys)
 646         return;
 647
 648     /* Invalidate all pictures that are currently in flight in order
 649      * to prevent the vout from using destroyed output buffers. */
 650     if (p_sys->direct_rendering)
 651         InvalidateAllPictures(p_dec);
 652     jni_attach_thread(&env, THREAD_NAME);
 653     if (p_sys->input_buffers)
 654         (*env)->DeleteGlobalRef(env, p_sys->input_buffers);
 655     if (p_sys->output_buffers)
 656         (*env)->DeleteGlobalRef(env, p_sys->output_buffers);
 657     if (p_sys->codec) {
 658         if (p_sys->started)
 659         {
 660             (*env)->CallVoidMethod(env, p_sys->codec, p_sys->stop);
 661             if (CHECK_EXCEPTION())
 662                 msg_Err(p_dec, "Exception in MediaCodec.stop");
 663         }
 664         if (p_sys->allocated)
 665         {
 666             (*env)->CallVoidMethod(env, p_sys->codec, p_sys->release);
 667             if (CHECK_EXCEPTION())
 668                 msg_Err(p_dec, "Exception in MediaCodec.release");
 669         }
 670         (*env)->DeleteGlobalRef(env, p_sys->codec);
 671     }
 672     if (p_sys->buffer_info)
 673         (*env)->DeleteGlobalRef(env, p_sys->buffer_info);
 674     jni_detach_thread();
 675
 676     free(p_sys->name);
 677     ArchitectureSpecificCopyHooksDestroy(p_sys->pixel_format, &p_sys->architecture_specific_data);
 678     free(p_sys->pp_inflight_pictures);
 679     if (p_sys->timestamp_fifo)
 680         timestamp_FifoRelease(p_sys->timestamp_fifo);
 681     free(p_sys);
 682 }
 683
 684 /*****************************************************************************
 685  * vout callbacks
 686  *****************************************************************************/
 687 static void UnlockPicture(picture_t* p_pic, bool b_render)
 688 {
 689     picture_sys_t *p_picsys = p_pic->p_sys;
 690     decoder_t *p_dec = p_picsys->priv.hw.p_dec;
 691     decoder_sys_t *p_sys = p_dec->p_sys;
 692
 693     if (!p_picsys->priv.hw.b_valid)
 694         return;
 695
 696     vlc_mutex_lock(get_android_opaque_mutex());
 697
 698     /* Picture might have been invalidated while waiting on the mutex. */
 699     if (!p_picsys->priv.hw.b_valid) {
 700         vlc_mutex_unlock(get_android_opaque_mutex());
 701         return;
 702     }
 703
 704     uint32_t i_index = p_picsys->priv.hw.i_index;
 705     InsertInflightPicture(p_dec, NULL, i_index);
 706
 707     /* Release the MediaCodec buffer. */
 708     JNIEnv *env = NULL;
 709     jni_attach_thread(&env, THREAD_NAME);
 710     (*env)->CallVoidMethod(env, p_sys->codec, p_sys->release_output_buffer, i_index, b_render);
 711     if (CHECK_EXCEPTION())
 712         msg_Err(p_dec, "Exception in MediaCodec.releaseOutputBuffer (DisplayBuffer)");
 713
 714     jni_detach_thread();
 715     p_picsys->priv.hw.b_valid = false;
 716
 717     vlc_mutex_unlock(get_android_opaque_mutex());
 718 }
 719
 720 static void InvalidateAllPictures(decoder_t *p_dec)
 721 {
 722     decoder_sys_t *p_sys = p_dec->p_sys;
 723
 724     vlc_mutex_lock(get_android_opaque_mutex());
 725
 726     for (unsigned int i = 0; i < p_sys->i_inflight_pictures; ++i) {
 727         picture_t *p_pic = p_sys->pp_inflight_pictures[i];
 728         if (p_pic) {
 729             p_pic->p_sys->priv.hw.b_valid = false;
 730             p_sys->pp_inflight_pictures[i] = NULL;
 731         }
 732     }
 733     vlc_mutex_unlock(get_android_opaque_mutex());
 734 }
 735
 736 static int InsertInflightPicture(decoder_t *p_dec, picture_t *p_pic,
 737                                  unsigned int i_index)
 738 {
 739     decoder_sys_t *p_sys = p_dec->p_sys;
 740
 741     if (i_index >= p_sys->i_inflight_pictures) {
 742         picture_t **pp_pics = realloc(p_sys->pp_inflight_pictures,
 743                                       (i_index + 1) * sizeof (picture_t *));
 744         if (!pp_pics)
 745             return -1;
 746         if (i_index - p_sys->i_inflight_pictures > 0)
 747             memset(&pp_pics[p_sys->i_inflight_pictures], 0,
 748                    (i_index - p_sys->i_inflight_pictures) * sizeof (picture_t *));
 749         p_sys->pp_inflight_pictures = pp_pics;
 750         p_sys->i_inflight_pictures = i_index + 1;
 751     }
 752     p_sys->pp_inflight_pictures[i_index] = p_pic;
 753     return 0;
 754 }
 755
 756 static void GetOutput(decoder_t *p_dec, JNIEnv *env, picture_t **pp_pic, jlong timeout)
 757 {
 758     decoder_sys_t *p_sys = p_dec->p_sys;
 759     while (1) {
 760         int index = (*env)->CallIntMethod(env, p_sys->codec, p_sys->dequeue_output_buffer,
 761                                           p_sys->buffer_info, timeout);
 762         if (CHECK_EXCEPTION()) {
 763             msg_Err(p_dec, "Exception in MediaCodec.dequeueOutputBuffer (GetOutput)");
 764             p_sys->error_state = true;
 765             return;
 766         }
 767
 768         if (index >= 0) {
 769             if (!p_sys->pixel_format) {
 770                 msg_Warn(p_dec, "Buffers returned before output format is set, dropping frame");
 771                 (*env)->CallVoidMethod(env, p_sys->codec, p_sys->release_output_buffer, index, false);
 772                 if (CHECK_EXCEPTION()) {
 773                     msg_Err(p_dec, "Exception in MediaCodec.releaseOutputBuffer");
 774                     p_sys->error_state = true;
 775                     return;
 776                 }
 777                 continue;
 778             }
 779
 780             if (!*pp_pic) {
 781                 *pp_pic = decoder_NewPicture(p_dec);
 782             } else if (p_sys->direct_rendering) {
 783                 picture_t *p_pic = *pp_pic;
 784                 picture_sys_t *p_picsys = p_pic->p_sys;
 785                 int i_prev_index = p_picsys->priv.hw.i_index;
 786                 (*env)->CallVoidMethod(env, p_sys->codec, p_sys->release_output_buffer, i_prev_index, false);
 787                 if (CHECK_EXCEPTION()) {
 788                     msg_Err(p_dec, "Exception in MediaCodec.releaseOutputBuffer " \
 789                             "(GetOutput, overwriting previous picture)");
 790                     p_sys->error_state = true;
 791                     return;
 792                 }
 793
 794                 // No need to lock here since the previous picture was not sent.
 795                 InsertInflightPicture(p_dec, NULL, i_prev_index);
 796             }
 797             if (*pp_pic) {
 798
 799                 picture_t *p_pic = *pp_pic;
 800                 /* If the oldest input block had no PTS, the timestamp
 801                  * of the frame returned by MediaCodec might be wrong
 802                  * so we overwrite it with the corresponding dts. */
 803                 int64_t forced_ts = timestamp_FifoGet(p_sys->timestamp_fifo);
 804                 if (forced_ts == VLC_TS_INVALID)
 805                     p_pic->date = (*env)->GetLongField(env, p_sys->buffer_info, p_sys->pts_field);
 806                 else
 807                     p_pic->date = forced_ts;
 808
 809                 if (p_sys->direct_rendering) {
 810                     picture_sys_t *p_picsys = p_pic->p_sys;
 811                     p_picsys->pf_lock_pic = NULL;
 812                     p_picsys->pf_unlock_pic = UnlockPicture;
 813                     p_picsys->priv.hw.p_dec = p_dec;
 814                     p_picsys->priv.hw.i_index = index;
 815                     p_picsys->priv.hw.b_valid = true;
 816
 817                     vlc_mutex_lock(get_android_opaque_mutex());
 818                     InsertInflightPicture(p_dec, p_pic, index);
 819                     vlc_mutex_unlock(get_android_opaque_mutex());
 820                 } else {
 821                     jobject buf;
 822                     if (p_sys->get_output_buffers)
 823                         buf = (*env)->GetObjectArrayElement(env, p_sys->output_buffers, index);
 824                     else
 825                         buf = (*env)->CallObjectMethod(env, p_sys->codec,
 826                                                        p_sys->get_output_buffer, index);
 827                     //jsize buf_size = (*env)->GetDirectBufferCapacity(env, buf);
 828                     uint8_t *ptr = (*env)->GetDirectBufferAddress(env, buf);
 829
 830                     //int size = (*env)->GetIntField(env, p_sys->buffer_info, p_sys->size_field);
 831                     int offset = (*env)->GetIntField(env, p_sys->buffer_info, p_sys->offset_field);
 832                     ptr += offset; // Check the size parameter as well
 833
 834                     unsigned int chroma_div;
 835                     GetVlcChromaSizes(p_dec->fmt_out.i_codec, p_dec->fmt_out.video.i_width,
 836                                       p_dec->fmt_out.video.i_height, NULL, NULL, &chroma_div);
 837                     CopyOmxPicture(p_sys->pixel_format, p_pic, p_sys->slice_height, p_sys->stride,
 838                                    ptr, chroma_div, &p_sys->architecture_specific_data);
 839                     (*env)->CallVoidMethod(env, p_sys->codec, p_sys->release_output_buffer, index, false);
 840
 841                     jthrowable exception = (*env)->ExceptionOccurred(env);
 842                     if (exception != NULL) {
 843                         jclass illegalStateException = (*env)->FindClass(env, "java/lang/IllegalStateException");
 844                         if((*env)->IsInstanceOf(env, exception, illegalStateException)) {
 845                             msg_Err(p_dec, "Codec error (IllegalStateException) in MediaCodec.releaseOutputBuffer");
 846                             (*env)->ExceptionClear(env);
 847                             (*env)->DeleteLocalRef(env, illegalStateException);
 848                             p_sys->error_state = true;
 849                         }
 850                     }
 851                     (*env)->DeleteLocalRef(env, buf);
 852                 }
 853             } else {
 854                 msg_Warn(p_dec, "NewPicture failed");
 855                 (*env)->CallVoidMethod(env, p_sys->codec, p_sys->release_output_buffer, index, false);
 856                 if (CHECK_EXCEPTION()) {
 857                     msg_Err(p_dec, "Exception in MediaCodec.releaseOutputBuffer (GetOutput)");
 858                     p_sys->error_state = true;
 859                 }
 860             }
 861             return;
 862
 863         } else if (index == INFO_OUTPUT_BUFFERS_CHANGED) {
 864             msg_Dbg(p_dec, "output buffers changed");
 865             if (!p_sys->get_output_buffers)
 866                 continue;
 867             (*env)->DeleteGlobalRef(env, p_sys->output_buffers);
 868
 869             p_sys->output_buffers = (*env)->CallObjectMethod(env, p_sys->codec,
 870                                                              p_sys->get_output_buffers);
 871             if (CHECK_EXCEPTION()) {
 872                 msg_Err(p_dec, "Exception in MediaCodec.getOutputBuffer (GetOutput)");
 873                 p_sys->output_buffers = NULL;
 874                 p_sys->error_state = true;
 875                 return;
 876             }
 877
 878             p_sys->output_buffers = (*env)->NewGlobalRef(env, p_sys->output_buffers);
 879         } else if (index == INFO_OUTPUT_FORMAT_CHANGED) {
 880             jobject format = (*env)->CallObjectMethod(env, p_sys->codec, p_sys->get_output_format);
 881             if (CHECK_EXCEPTION()) {
 882                 msg_Err(p_dec, "Exception in MediaCodec.getOutputFormat (GetOutput)");
 883                 p_sys->error_state = true;
 884                 return;
 885             }
 886
 887             jobject format_string = (*env)->CallObjectMethod(env, format, p_sys->tostring);
 888
 889             jsize format_len = (*env)->GetStringUTFLength(env, format_string);
 890             const char *format_ptr = (*env)->GetStringUTFChars(env, format_string, NULL);
 891             msg_Dbg(p_dec, "output format changed: %.*s", format_len, format_ptr);
 892             (*env)->ReleaseStringUTFChars(env, format_string, format_ptr);
 893
 894             ArchitectureSpecificCopyHooksDestroy(p_sys->pixel_format, &p_sys->architecture_specific_data);
 895
 896             int width           = GET_INTEGER(format, "width");
 897             int height          = GET_INTEGER(format, "height");
 898             p_sys->stride       = GET_INTEGER(format, "stride");
 899             p_sys->slice_height = GET_INTEGER(format, "slice-height");
 900             p_sys->pixel_format = GET_INTEGER(format, "color-format");
 901             int crop_left       = GET_INTEGER(format, "crop-left");
 902             int crop_top        = GET_INTEGER(format, "crop-top");
 903             int crop_right      = GET_INTEGER(format, "crop-right");
 904             int crop_bottom     = GET_INTEGER(format, "crop-bottom");
 905
 906             const char *name = "unknown";
 907             if (!p_sys->direct_rendering) {
 908                 if (!GetVlcChromaFormat(p_sys->pixel_format,
 909                                         &p_dec->fmt_out.i_codec, &name)) {
 910                     msg_Err(p_dec, "color-format not recognized");
 911                     p_sys->error_state = true;
 912                     return;
 913                 }
 914             }
 915
 916             msg_Err(p_dec, "output: %d %s, %dx%d stride %d %d, crop %d %d %d %d",
 917                     p_sys->pixel_format, name, width, height, p_sys->stride, p_sys->slice_height,
 918                     crop_left, crop_top, crop_right, crop_bottom);
 919
 920             p_dec->fmt_out.video.i_width = crop_right + 1 - crop_left;
 921             p_dec->fmt_out.video.i_height = crop_bottom + 1 - crop_top;
 922             if (p_dec->fmt_out.video.i_width <= 1
 923                 || p_dec->fmt_out.video.i_height <= 1) {
 924                 p_dec->fmt_out.video.i_width = width;
 925                 p_dec->fmt_out.video.i_height = height;
 926             }
 927             p_dec->fmt_out.video.i_visible_width = p_dec->fmt_out.video.i_width;
 928             p_dec->fmt_out.video.i_visible_height = p_dec->fmt_out.video.i_height;
 929
 930             if (p_sys->stride <= 0)
 931                 p_sys->stride = width;
 932             if (p_sys->slice_height <= 0)
 933                 p_sys->slice_height = height;
 934             CHECK_EXCEPTION();
 935
 936             ArchitectureSpecificCopyHooks(p_dec, p_sys->pixel_format, p_sys->slice_height,
 937                                           p_sys->stride, &p_sys->architecture_specific_data);
 938             if (p_sys->pixel_format == OMX_TI_COLOR_FormatYUV420PackedSemiPlanar)
 939                 p_sys->slice_height -= crop_top/2;
 940             if (IgnoreOmxDecoderPadding(p_sys->name)) {
 941                 p_sys->slice_height = 0;
 942                 p_sys->stride = p_dec->fmt_out.video.i_width;
 943             }
 944
 945         } else {
 946             return;
 947         }
 948     }
 949 }
 950
 951 static picture_t *DecodeVideo(decoder_t *p_dec, block_t **pp_block)
 952 {
 953     decoder_sys_t *p_sys = p_dec->p_sys;
 954     picture_t *p_pic = NULL;
 955     JNIEnv *env = NULL;
 956     struct H264ConvertState convert_state = { 0, 0 };
 957
 958     if (!pp_block || !*pp_block)
 959         return NULL;
 960
 961     block_t *p_block = *pp_block;
 962
 963     if (p_sys->error_state) {
 964         block_Release(p_block);
 965         if (!p_sys->error_event_sent) {
 966             /* Signal the error to the Java. */
 967             jni_EventHardwareAccelerationError();
 968             p_sys->error_event_sent = true;
 969         }
 970         return NULL;
 971     }
 972
 973     jni_attach_thread(&env, THREAD_NAME);
 974
 975     if (p_block->i_flags & (BLOCK_FLAG_DISCONTINUITY|BLOCK_FLAG_CORRUPTED)) {
 976         block_Release(p_block);
 977         timestamp_FifoEmpty(p_sys->timestamp_fifo);
 978         if (p_sys->decoded) {
 979             /* Invalidate all pictures that are currently in flight
 980              * since flushing make all previous indices returned by
 981              * MediaCodec invalid. */
 982             if (p_sys->direct_rendering)
 983                 InvalidateAllPictures(p_dec);
 984
 985             (*env)->CallVoidMethod(env, p_sys->codec, p_sys->flush);
 986             if (CHECK_EXCEPTION()) {
 987                 msg_Warn(p_dec, "Exception occurred in MediaCodec.flush");
 988                 p_sys->error_state = true;
 989             }
 990         }
 991         p_sys->decoded = false;
 992         jni_detach_thread();
 993         return NULL;
 994     }
 995
 996     /* Use the aspect ratio provided by the input (ie read from packetizer).
 997      * Don't check the current value of the aspect ratio in fmt_out, since we
 998      * want to allow changes in it to propagate. */
 999     if (p_dec->fmt_in.video.i_sar_num != 0 && p_dec->fmt_in.video.i_sar_den != 0) {
1000         p_dec->fmt_out.video.i_sar_num = p_dec->fmt_in.video.i_sar_num;
1001         p_dec->fmt_out.video.i_sar_den = p_dec->fmt_in.video.i_sar_den;
1002     }
1003
1004     jlong timeout = 0;
1005     const int max_polling_attempts = 50;
1006     int attempts = 0;
1007     while (true) {
1008         int index = (*env)->CallIntMethod(env, p_sys->codec, p_sys->dequeue_input_buffer, (jlong) 0);
1009         if (CHECK_EXCEPTION()) {
1010             msg_Err(p_dec, "Exception occurred in MediaCodec.dequeueInputBuffer");
1011             p_sys->error_state = true;
1012             break;
1013         }
1014
1015         if (index < 0) {
1016             GetOutput(p_dec, env, &p_pic, timeout);
1017             if (p_sys->error_state)
1018                 break;
1019             if (p_pic) {
1020                 /* If we couldn't get an available input buffer but a
1021                  * decoded frame is available, we return the frame
1022                  * without assigning NULL to *pp_block. The next call
1023                  * to DecodeVideo will try to send the input packet again.
1024                  */
1025                 jni_detach_thread();
1026                 return p_pic;
1027             }
1028             timeout = 30 * 1000;
1029             ++attempts;
1030             /* With opaque DR the output buffers are released by the
1031                vout therefore we implement a timeout for polling in
1032                order to avoid being indefinitely stalled in this loop. */
1033             if (p_sys->direct_rendering && attempts == max_polling_attempts) {
1034                 picture_t *invalid_picture = decoder_NewPicture(p_dec);
1035                 if (invalid_picture) {
1036                     invalid_picture->date = VLC_TS_INVALID;
1037                     picture_sys_t *p_picsys = invalid_picture->p_sys;
1038                     p_picsys->pf_lock_pic = NULL;
1039                     p_picsys->pf_unlock_pic = NULL;
1040                     p_picsys->priv.hw.p_dec = NULL;
1041                     p_picsys->priv.hw.i_index = -1;
1042                     p_picsys->priv.hw.b_valid = false;
1043                 }
1044                 else {
1045                     /* If we cannot return a picture we must free the
1046                        block since the decoder will proceed with the
1047                        next block. */
1048                     block_Release(p_block);
1049                     *pp_block = NULL;
1050                 }
1051                 jni_detach_thread();
1052                 return invalid_picture;
1053             }
1054             continue;
1055         }
1056
1057         jobject buf;
1058         if (p_sys->get_input_buffers)
1059             buf = (*env)->GetObjectArrayElement(env, p_sys->input_buffers, index);
1060         else
1061             buf = (*env)->CallObjectMethod(env, p_sys->codec, p_sys->get_input_buffer, index);
1062         jsize size = (*env)->GetDirectBufferCapacity(env, buf);
1063         uint8_t *bufptr = (*env)->GetDirectBufferAddress(env, buf);
1064         if (size < 0) {
1065             msg_Err(p_dec, "Java buffer has invalid size");
1066             p_sys->error_state = true;
1067             break;
1068         }
1069         if ((size_t) size > p_block->i_buffer)
1070             size = p_block->i_buffer;
1071         memcpy(bufptr, p_block->p_buffer, size);
1072
1073         convert_h264_to_annexb(bufptr, size, p_sys->nal_size, &convert_state);
1074
1075         int64_t ts = p_block->i_pts;
1076         if (!ts && p_block->i_dts)
1077             ts = p_block->i_dts;
1078         timestamp_FifoPut(p_sys->timestamp_fifo, p_block->i_pts ? VLC_TS_INVALID : p_block->i_dts);
1079         (*env)->CallVoidMethod(env, p_sys->codec, p_sys->queue_input_buffer, index, 0, size, ts, 0);
1080         (*env)->DeleteLocalRef(env, buf);
1081         if (CHECK_EXCEPTION()) {
1082             msg_Err(p_dec, "Exception in MediaCodec.queueInputBuffer");
1083             p_sys->error_state = true;
1084             break;
1085         }
1086         p_sys->decoded = true;
1087         break;
1088     }
1089     if (p_sys->error_state) {
1090         if (p_pic)
1091             picture_Release(p_pic);
1092         jni_detach_thread();
1093         return NULL;
1094     }
1095     if (!p_pic)
1096         GetOutput(p_dec, env, &p_pic, 0);
1097     jni_detach_thread();
1098
1099     block_Release(p_block);
1100     *pp_block = NULL;
1101
1102     return p_pic;
1103 }