libavcodec/libxavs.c

   1 /*
   2  * AVS encoding using the xavs library
   3  * Copyright (C) 2010 Amanda, Y.N. Wu <amanda11192003@gmail.com>
   4  *
   5  * This file is part of Libav.
   6  *
   7  * Libav is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * Libav 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 Libav; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <math.h>
  26 #include <stdint.h>
  27 #include <float.h>
  28 #include <xavs.h>
  29 #include "avcodec.h"
  30 #include "internal.h"
  31 #include "libavutil/internal.h"
  32 #include "libavutil/mem.h"
  33 #include "libavutil/opt.h"
  34
  35 #define END_OF_STREAM 0x001
  36
  37 #define XAVS_PART_I8X8 0x002 /* Analyze i8x8 (requires 8x8 transform) */
  38 #define XAVS_PART_P8X8 0x010 /* Analyze p16x8, p8x16 and p8x8 */
  39 #define XAVS_PART_B8X8 0x100 /* Analyze b16x8, b*/
  40
  41 typedef struct XavsContext {
  42     AVClass        *class;
  43     xavs_param_t    params;
  44     xavs_t         *enc;
  45     xavs_picture_t  pic;
  46     uint8_t        *sei;
  47     int             sei_size;
  48     int             end_of_stream;
  49     float crf;
  50     int cqp;
  51     int b_bias;
  52     float cplxblur;
  53     int direct_pred;
  54     int aud;
  55     int fast_pskip;
  56     int motion_est;
  57     int mbtree;
  58     int mixed_refs;
  59     int b_frame_strategy;
  60     int chroma_offset;
  61     int scenechange_threshold;
  62     int noise_reduction;
  63
  64     int64_t *pts_buffer;
  65     int out_frame_count;
  66 } XavsContext;
  67
  68 static void XAVS_log(void *p, int level, const char *fmt, va_list args)
  69 {
  70     static const int level_map[] = {
  71         [XAVS_LOG_ERROR]   = AV_LOG_ERROR,
  72         [XAVS_LOG_WARNING] = AV_LOG_WARNING,
  73         [XAVS_LOG_INFO]    = AV_LOG_INFO,
  74         [XAVS_LOG_DEBUG]   = AV_LOG_DEBUG
  75     };
  76
  77     if (level < 0 || level > XAVS_LOG_DEBUG)
  78         return;
  79
  80     av_vlog(p, level_map[level], fmt, args);
  81 }
  82
  83 static int encode_nals(AVCodecContext *ctx, AVPacket *pkt,
  84                        xavs_nal_t *nals, int nnal)
  85 {
  86     XavsContext *x4 = ctx->priv_data;
  87     uint8_t *p;
  88     int i, s, ret, size = x4->sei_size + AV_INPUT_BUFFER_MIN_SIZE;
  89
  90     if (!nnal)
  91         return 0;
  92
  93     for (i = 0; i < nnal; i++)
  94         size += nals[i].i_payload;
  95
  96     if ((ret = ff_alloc_packet(pkt, size)) < 0) {
  97         av_log(ctx, AV_LOG_ERROR, "Error getting output packet of size %d.\n", size);
  98         return ret;
  99     }
 100     p = pkt->data;
 101
 102     /* Write the SEI as part of the first frame. */
 103     if (x4->sei_size > 0 && nnal > 0) {
 104         memcpy(p, x4->sei, x4->sei_size);
 105         p += x4->sei_size;
 106         x4->sei_size = 0;
 107     }
 108
 109     for (i = 0; i < nnal; i++) {
 110         s = xavs_nal_encode(p, &size, 1, nals + i);
 111         if (s < 0)
 112             return -1;
 113         p += s;
 114     }
 115     pkt->size = p - pkt->data;
 116
 117     return 1;
 118 }
 119
 120 static int XAVS_frame(AVCodecContext *avctx, AVPacket *pkt,
 121                       const AVFrame *frame, int *got_packet)
 122 {
 123     XavsContext *x4 = avctx->priv_data;
 124     xavs_nal_t *nal;
 125     int nnal, i, ret;
 126     xavs_picture_t pic_out;
 127     uint8_t *sd;
 128
 129     x4->pic.img.i_csp   = XAVS_CSP_I420;
 130     x4->pic.img.i_plane = 3;
 131
 132     if (frame) {
 133        for (i = 0; i < 3; i++) {
 134             x4->pic.img.plane[i] = frame->data[i];
 135             x4->pic.img.i_stride[i] = frame->linesize[i];
 136        }
 137
 138         x4->pic.i_pts  = frame->pts;
 139         x4->pic.i_type = XAVS_TYPE_AUTO;
 140         x4->pts_buffer[avctx->frame_number % (avctx->max_b_frames+1)] = frame->pts;
 141     }
 142
 143     if (xavs_encoder_encode(x4->enc, &nal, &nnal,
 144                             frame? &x4->pic: NULL, &pic_out) < 0)
 145     return -1;
 146
 147     ret = encode_nals(avctx, pkt, nal, nnal);
 148
 149     if (ret < 0)
 150         return -1;
 151
 152     if (!ret) {
 153         if (!frame && !(x4->end_of_stream)) {
 154             if ((ret = ff_alloc_packet(pkt, 4)) < 0)
 155                 return ret;
 156
 157             pkt->data[0] = 0x0;
 158             pkt->data[1] = 0x0;
 159             pkt->data[2] = 0x01;
 160             pkt->data[3] = 0xb1;
 161             pkt->dts = 2*x4->pts_buffer[(x4->out_frame_count-1)%(avctx->max_b_frames+1)] -
 162                        x4->pts_buffer[(x4->out_frame_count-2)%(avctx->max_b_frames+1)];
 163             x4->end_of_stream = END_OF_STREAM;
 164             *got_packet = 1;
 165         }
 166         return 0;
 167     }
 168
 169 #if FF_API_CODED_FRAME
 170 FF_DISABLE_DEPRECATION_WARNINGS
 171     avctx->coded_frame->pts = pic_out.i_pts;
 172 FF_ENABLE_DEPRECATION_WARNINGS
 173 #endif
 174     pkt->pts = pic_out.i_pts;
 175     if (avctx->has_b_frames) {
 176         if (!x4->out_frame_count)
 177             pkt->dts = pkt->pts - (x4->pts_buffer[1] - x4->pts_buffer[0]);
 178         else
 179             pkt->dts = x4->pts_buffer[(x4->out_frame_count-1)%(avctx->max_b_frames+1)];
 180     } else
 181         pkt->dts = pkt->pts;
 182
 183 #if FF_API_CODED_FRAME
 184 FF_DISABLE_DEPRECATION_WARNINGS
 185     switch (pic_out.i_type) {
 186     case XAVS_TYPE_IDR:
 187     case XAVS_TYPE_I:
 188         avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
 189         break;
 190     case XAVS_TYPE_P:
 191         avctx->coded_frame->pict_type = AV_PICTURE_TYPE_P;
 192         break;
 193     case XAVS_TYPE_B:
 194     case XAVS_TYPE_BREF:
 195         avctx->coded_frame->pict_type = AV_PICTURE_TYPE_B;
 196         break;
 197     }
 198 FF_ENABLE_DEPRECATION_WARNINGS
 199 #endif
 200
 201     /* There is no IDR frame in AVS JiZhun */
 202     /* Sequence header is used as a flag */
 203     if (pic_out.i_type == XAVS_TYPE_I) {
 204 #if FF_API_CODED_FRAME
 205 FF_DISABLE_DEPRECATION_WARNINGS
 206         avctx->coded_frame->key_frame = 1;
 207 FF_ENABLE_DEPRECATION_WARNINGS
 208 #endif
 209         pkt->flags |= AV_PKT_FLAG_KEY;
 210     }
 211
 212 #if FF_API_CODED_FRAME
 213 FF_DISABLE_DEPRECATION_WARNINGS
 214     avctx->coded_frame->quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
 215 FF_ENABLE_DEPRECATION_WARNINGS
 216 #endif
 217
 218     sd = av_packet_new_side_data(pkt, AV_PKT_DATA_QUALITY_FACTOR, sizeof(int));
 219     if (!sd)
 220         return AVERROR(ENOMEM);
 221     *(int *)sd = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
 222
 223     x4->out_frame_count++;
 224     *got_packet = ret;
 225     return 0;
 226 }
 227
 228 static av_cold int XAVS_close(AVCodecContext *avctx)
 229 {
 230     XavsContext *x4 = avctx->priv_data;
 231
 232     av_freep(&avctx->extradata);
 233     av_free(x4->sei);
 234     av_freep(&x4->pts_buffer);
 235
 236     if (x4->enc)
 237         xavs_encoder_close(x4->enc);
 238
 239     return 0;
 240 }
 241
 242 static av_cold int XAVS_init(AVCodecContext *avctx)
 243 {
 244     XavsContext *x4 = avctx->priv_data;
 245
 246     x4->sei_size = 0;
 247     xavs_param_default(&x4->params);
 248
 249     x4->params.pf_log               = XAVS_log;
 250     x4->params.p_log_private        = avctx;
 251     x4->params.i_keyint_max         = avctx->gop_size;
 252     if (avctx->bit_rate) {
 253         x4->params.rc.i_bitrate   = avctx->bit_rate / 1000;
 254         x4->params.rc.i_rc_method = XAVS_RC_ABR;
 255     }
 256     x4->params.rc.i_vbv_buffer_size = avctx->rc_buffer_size / 1000;
 257     x4->params.rc.i_vbv_max_bitrate = avctx->rc_max_rate    / 1000;
 258     x4->params.rc.b_stat_write      = avctx->flags & AV_CODEC_FLAG_PASS1;
 259     if (avctx->flags & AV_CODEC_FLAG_PASS2) {
 260         x4->params.rc.b_stat_read = 1;
 261     } else {
 262         if (x4->crf >= 0) {
 263             x4->params.rc.i_rc_method   = XAVS_RC_CRF;
 264             x4->params.rc.f_rf_constant = x4->crf;
 265         } else if (x4->cqp >= 0) {
 266             x4->params.rc.i_rc_method   = XAVS_RC_CQP;
 267             x4->params.rc.i_qp_constant = x4->cqp;
 268         }
 269     }
 270
 271     if (x4->aud >= 0)
 272         x4->params.b_aud                      = x4->aud;
 273     if (x4->mbtree >= 0)
 274         x4->params.rc.b_mb_tree               = x4->mbtree;
 275     if (x4->direct_pred >= 0)
 276         x4->params.analyse.i_direct_mv_pred   = x4->direct_pred;
 277     if (x4->fast_pskip >= 0)
 278         x4->params.analyse.b_fast_pskip       = x4->fast_pskip;
 279     if (x4->motion_est >= 0)
 280         x4->params.analyse.i_me_method        = x4->motion_est;
 281     if (x4->mixed_refs >= 0)
 282         x4->params.analyse.b_mixed_references = x4->mixed_refs;
 283     if (x4->b_bias != INT_MIN)
 284         x4->params.i_bframe_bias              = x4->b_bias;
 285     if (x4->cplxblur >= 0)
 286         x4->params.rc.f_complexity_blur = x4->cplxblur;
 287
 288     x4->params.i_bframe          = avctx->max_b_frames;
 289     /* cabac is not included in AVS JiZhun Profile */
 290     x4->params.b_cabac           = 0;
 291
 292 #if FF_API_PRIVATE_OPT
 293 FF_DISABLE_DEPRECATION_WARNINGS
 294     if (avctx->b_frame_strategy)
 295         x4->b_frame_strategy = avctx->b_frame_strategy;
 296 FF_ENABLE_DEPRECATION_WARNINGS
 297 #endif
 298
 299     x4->params.i_bframe_adaptive = x4->b_frame_strategy;
 300
 301     avctx->has_b_frames          = !!avctx->max_b_frames;
 302
 303     /* AVS doesn't allow B picture as reference */
 304     /* The max allowed reference frame number of B is 2 */
 305     x4->params.i_keyint_min      = avctx->keyint_min;
 306     if (x4->params.i_keyint_min > x4->params.i_keyint_max)
 307         x4->params.i_keyint_min = x4->params.i_keyint_max;
 308
 309 #if FF_API_PRIVATE_OPT
 310 FF_DISABLE_DEPRECATION_WARNINGS
 311     if (avctx->scenechange_threshold)
 312         x4->scenechange_threshold = avctx->scenechange_threshold;
 313 FF_ENABLE_DEPRECATION_WARNINGS
 314 #endif
 315
 316     x4->params.i_scenecut_threshold = x4->scenechange_threshold;
 317
 318    // x4->params.b_deblocking_filter       = avctx->flags & AV_CODEC_FLAG_LOOP_FILTER;
 319
 320     x4->params.rc.i_qp_min                 = avctx->qmin;
 321     x4->params.rc.i_qp_max                 = avctx->qmax;
 322     x4->params.rc.i_qp_step                = avctx->max_qdiff;
 323
 324     x4->params.rc.f_qcompress       = avctx->qcompress; /* 0.0 => cbr, 1.0 => constant qp */
 325     x4->params.rc.f_qblur           = avctx->qblur;     /* temporally blur quants */
 326
 327     x4->params.i_frame_reference    = avctx->refs;
 328
 329     x4->params.i_width              = avctx->width;
 330     x4->params.i_height             = avctx->height;
 331     x4->params.vui.i_sar_width      = avctx->sample_aspect_ratio.num;
 332     x4->params.vui.i_sar_height     = avctx->sample_aspect_ratio.den;
 333     /* This is only used for counting the fps */
 334     x4->params.i_fps_num            = avctx->time_base.den;
 335     x4->params.i_fps_den            = avctx->time_base.num;
 336     x4->params.analyse.inter        = XAVS_ANALYSE_I8x8 |XAVS_ANALYSE_PSUB16x16| XAVS_ANALYSE_BSUB16x16;
 337
 338     x4->params.analyse.i_me_range = avctx->me_range;
 339     x4->params.analyse.i_subpel_refine    = avctx->me_subpel_quality;
 340
 341     x4->params.analyse.b_chroma_me        = avctx->me_cmp & FF_CMP_CHROMA;
 342     /* AVS P2 only enables 8x8 transform */
 343     x4->params.analyse.b_transform_8x8    = 1; //avctx->flags2 & AV_CODEC_FLAG2_8X8DCT;
 344
 345     x4->params.analyse.i_trellis          = avctx->trellis;
 346
 347 #if FF_API_PRIVATE_OPT
 348     FF_DISABLE_DEPRECATION_WARNINGS
 349     if (avctx->noise_reduction >= 0)
 350         x4->noise_reduction = avctx->noise_reduction;
 351     FF_ENABLE_DEPRECATION_WARNINGS
 352 #endif
 353
 354     x4->params.analyse.i_noise_reduction  = x4->noise_reduction;
 355
 356     if (avctx->level > 0)
 357         x4->params.i_level_idc = avctx->level;
 358
 359     if (avctx->bit_rate > 0)
 360         x4->params.rc.f_rate_tolerance =
 361             (float)avctx->bit_rate_tolerance / avctx->bit_rate;
 362
 363     if ((avctx->rc_buffer_size) &&
 364         (avctx->rc_initial_buffer_occupancy <= avctx->rc_buffer_size)) {
 365         x4->params.rc.f_vbv_buffer_init =
 366             (float)avctx->rc_initial_buffer_occupancy / avctx->rc_buffer_size;
 367     } else
 368         x4->params.rc.f_vbv_buffer_init = 0.9;
 369
 370     /* TAG:do we have MB tree RC method */
 371     /* what is the RC method we are now using? Default NO */
 372     x4->params.rc.f_ip_factor             = 1 / fabs(avctx->i_quant_factor);
 373     x4->params.rc.f_pb_factor             = avctx->b_quant_factor;
 374
 375 #if FF_API_PRIVATE_OPT
 376 FF_DISABLE_DEPRECATION_WARNINGS
 377     if (avctx->chromaoffset)
 378         x4->chroma_offset = avctx->chromaoffset;
 379 FF_ENABLE_DEPRECATION_WARNINGS
 380 #endif
 381
 382     x4->params.analyse.i_chroma_qp_offset = x4->chroma_offset;
 383
 384     x4->params.analyse.b_psnr = avctx->flags & AV_CODEC_FLAG_PSNR;
 385     x4->params.i_log_level    = XAVS_LOG_DEBUG;
 386     x4->params.i_threads      = avctx->thread_count;
 387     x4->params.b_interlaced   = avctx->flags & AV_CODEC_FLAG_INTERLACED_DCT;
 388
 389     if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER)
 390         x4->params.b_repeat_headers = 0;
 391
 392     x4->enc = xavs_encoder_open(&x4->params);
 393     if (!x4->enc)
 394         return -1;
 395
 396     if (!(x4->pts_buffer = av_mallocz((avctx->max_b_frames+1) * sizeof(*x4->pts_buffer))))
 397         return AVERROR(ENOMEM);
 398
 399     /* TAG: Do we have GLOBAL HEADER in AVS */
 400     /* We Have PPS and SPS in AVS */
 401     if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
 402         xavs_nal_t *nal;
 403         int nnal, s, i, size;
 404         uint8_t *p;
 405
 406         s = xavs_encoder_headers(x4->enc, &nal, &nnal);
 407
 408         avctx->extradata = p = av_malloc(s);
 409         for (i = 0; i < nnal; i++) {
 410             /* Don't put the SEI in extradata. */
 411             if (nal[i].i_type == NAL_SEI) {
 412                 x4->sei = av_malloc( 5 + nal[i].i_payload * 4 / 3 );
 413                 if (xavs_nal_encode(x4->sei, &x4->sei_size, 1, nal + i) < 0)
 414                     return -1;
 415
 416                 continue;
 417             }
 418             size = xavs_nal_encode(p, &s, 1, nal + i);
 419             if (size < 0)
 420                 return -1;
 421             p += size;
 422         }
 423         avctx->extradata_size = p - avctx->extradata;
 424     }
 425     return 0;
 426 }
 427
 428 #define OFFSET(x) offsetof(XavsContext, x)
 429 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
 430 static const AVOption options[] = {
 431     { "crf",           "Select the quality for constant quality mode",    OFFSET(crf),           AV_OPT_TYPE_FLOAT,  {-1 }, -1, FLT_MAX, VE },
 432     { "qp",            "Constant quantization parameter rate control method",OFFSET(cqp),        AV_OPT_TYPE_INT,    {.i64 = -1 }, -1, INT_MAX, VE },
 433     { "b-bias",        "Influences how often B-frames are used",          OFFSET(b_bias),        AV_OPT_TYPE_INT,    {.i64 = INT_MIN}, INT_MIN, INT_MAX, VE },
 434     { "cplxblur",      "Reduce fluctuations in QP (before curve compression)", OFFSET(cplxblur), AV_OPT_TYPE_FLOAT,  {-1 }, -1, FLT_MAX, VE},
 435     { "direct-pred",   "Direct MV prediction mode",                       OFFSET(direct_pred),   AV_OPT_TYPE_INT,    {.i64 = -1 }, -1, INT_MAX, VE, "direct-pred" },
 436     { "none",          NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = XAVS_DIRECT_PRED_NONE },     0, 0, VE, "direct-pred" },
 437     { "spatial",       NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = XAVS_DIRECT_PRED_SPATIAL },  0, 0, VE, "direct-pred" },
 438     { "temporal",      NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = XAVS_DIRECT_PRED_TEMPORAL }, 0, 0, VE, "direct-pred" },
 439     { "auto",          NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = XAVS_DIRECT_PRED_AUTO },     0, 0, VE, "direct-pred" },
 440     { "aud",           "Use access unit delimiters.",                     OFFSET(aud),           AV_OPT_TYPE_INT,    {.i64 = -1 }, -1, 1, VE},
 441     { "mbtree",        "Use macroblock tree ratecontrol.",                OFFSET(mbtree),        AV_OPT_TYPE_INT,    {.i64 = -1 }, -1, 1, VE},
 442     { "mixed-refs",    "One reference per partition, as opposed to one reference per macroblock", OFFSET(mixed_refs), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 1, VE },
 443     { "fast-pskip",    NULL,                                              OFFSET(fast_pskip),    AV_OPT_TYPE_INT,    {.i64 = -1 }, -1, 1, VE},
 444     { "motion-est",   "Set motion estimation method",                     OFFSET(motion_est),    AV_OPT_TYPE_INT,    { .i64 = -1 }, -1, XAVS_ME_TESA, VE, "motion-est"},
 445     { "dia",           NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = XAVS_ME_DIA },               INT_MIN, INT_MAX, VE, "motion-est" },
 446     { "hex",           NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = XAVS_ME_HEX },               INT_MIN, INT_MAX, VE, "motion-est" },
 447     { "umh",           NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = XAVS_ME_UMH },               INT_MIN, INT_MAX, VE, "motion-est" },
 448     { "esa",           NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = XAVS_ME_ESA },               INT_MIN, INT_MAX, VE, "motion-est" },
 449     { "tesa",          NULL,      0,    AV_OPT_TYPE_CONST, { .i64 = XAVS_ME_TESA },              INT_MIN, INT_MAX, VE, "motion-est" },
 450     { "b_strategy",    "Strategy to choose between I/P/B-frames",         OFFSET(b_frame_strategy), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 2, VE},
 451     { "chromaoffset", "QP difference between chroma and luma",           OFFSET(chroma_offset), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, VE},
 452     { "sc_threshold", "Scene change threshold",                           OFFSET(scenechange_threshold), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, VE},
 453     { "noise_reduction", "Noise reduction",                               OFFSET(noise_reduction), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, VE},
 454
 455     { NULL },
 456 };
 457
 458 static const AVClass class = {
 459     .class_name = "libxavs",
 460     .item_name  = av_default_item_name,
 461     .option     = options,
 462     .version    = LIBAVUTIL_VERSION_INT,
 463 };
 464
 465 static const AVCodecDefault xavs_defaults[] = {
 466     { "b",                "0" },
 467     { NULL },
 468 };
 469
 470 AVCodec ff_libxavs_encoder = {
 471     .name           = "libxavs",
 472     .long_name      = NULL_IF_CONFIG_SMALL("libxavs Chinese AVS (Audio Video Standard)"),
 473     .type           = AVMEDIA_TYPE_VIDEO,
 474     .id             = AV_CODEC_ID_CAVS,
 475     .priv_data_size = sizeof(XavsContext),
 476     .init           = XAVS_init,
 477     .encode2        = XAVS_frame,
 478     .close          = XAVS_close,
 479     .capabilities   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AUTO_THREADS,
 480     .pix_fmts       = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
 481     .priv_class     = &class,
 482     .defaults       = xavs_defaults,
 483     .wrapper_name   = "libxavs",
 484 };