libavfilter/vf_scale_npp.c

   1 /*
   2  * This file is part of Libav.
   3  *
   4  * Libav is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * Libav is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with Libav; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 /**
  20  * @file
  21  * scale video filter
  22  */
  23
  24 #include <nppi.h>
  25 #include <stdio.h>
  26 #include <string.h>
  27
  28 #include "libavutil/avstring.h"
  29 #include "libavutil/common.h"
  30 #include "libavutil/eval.h"
  31 #include "libavutil/hwcontext.h"
  32 #include "libavutil/hwcontext_cuda.h"
  33 #include "libavutil/internal.h"
  34 #include "libavutil/mathematics.h"
  35 #include "libavutil/opt.h"
  36 #include "libavutil/pixdesc.h"
  37
  38 #include "avfilter.h"
  39 #include "formats.h"
  40 #include "internal.h"
  41 #include "video.h"
  42
  43 static const enum AVPixelFormat supported_formats[] = {
  44     AV_PIX_FMT_YUV420P,
  45     AV_PIX_FMT_NV12,
  46     AV_PIX_FMT_YUV444P,
  47 };
  48
  49 static const enum AVPixelFormat deinterleaved_formats[][2] = {
  50     { AV_PIX_FMT_NV12, AV_PIX_FMT_YUV420P },
  51 };
  52
  53 static const char *const var_names[] = {
  54     "PI",
  55     "PHI",
  56     "E",
  57     "in_w",   "iw",
  58     "in_h",   "ih",
  59     "out_w",  "ow",
  60     "out_h",  "oh",
  61     "a", "dar",
  62     "sar",
  63     NULL
  64 };
  65
  66 enum var_name {
  67     VAR_PI,
  68     VAR_PHI,
  69     VAR_E,
  70     VAR_IN_W,   VAR_IW,
  71     VAR_IN_H,   VAR_IH,
  72     VAR_OUT_W,  VAR_OW,
  73     VAR_OUT_H,  VAR_OH,
  74     VAR_A, VAR_DAR,
  75     VAR_SAR,
  76     VARS_NB
  77 };
  78
  79 enum ScaleStage {
  80     STAGE_DEINTERLEAVE,
  81     STAGE_RESIZE,
  82     STAGE_INTERLEAVE,
  83     STAGE_NB,
  84 };
  85
  86 typedef struct NPPScaleStageContext {
  87     int stage_needed;
  88     enum AVPixelFormat in_fmt;
  89     enum AVPixelFormat out_fmt;
  90
  91     struct {
  92         int width;
  93         int height;
  94     } planes_in[3], planes_out[3];
  95
  96     AVBufferRef *frames_ctx;
  97     AVFrame     *frame;
  98 } NPPScaleStageContext;
  99
 100 typedef struct NPPScaleContext {
 101     const AVClass *class;
 102
 103     NPPScaleStageContext stages[STAGE_NB];
 104     AVFrame *tmp_frame;
 105     int passthrough;
 106
 107     int shift_width, shift_height;
 108
 109     /**
 110      * New dimensions. Special values are:
 111      *   0 = original width/height
 112      *  -1 = keep original aspect
 113      */
 114     int w, h;
 115
 116     /**
 117      * Output sw format. AV_PIX_FMT_NONE for no conversion.
 118      */
 119     enum AVPixelFormat format;
 120
 121     char *w_expr;               ///< width  expression string
 122     char *h_expr;               ///< height expression string
 123     char *format_str;
 124
 125     int interp_algo;
 126 } NPPScaleContext;
 127
 128 static int nppscale_init(AVFilterContext *ctx)
 129 {
 130     NPPScaleContext *s = ctx->priv;
 131     int i;
 132
 133     if (!strcmp(s->format_str, "same")) {
 134         s->format = AV_PIX_FMT_NONE;
 135     } else {
 136         s->format = av_get_pix_fmt(s->format_str);
 137         if (s->format == AV_PIX_FMT_NONE) {
 138             av_log(ctx, AV_LOG_ERROR, "Unrecognized pixel format: %s\n", s->format_str);
 139             return AVERROR(EINVAL);
 140         }
 141     }
 142
 143     for (i = 0; i < FF_ARRAY_ELEMS(s->stages); i++) {
 144         s->stages[i].frame = av_frame_alloc();
 145         if (!s->stages[i].frame)
 146             return AVERROR(ENOMEM);
 147     }
 148     s->tmp_frame = av_frame_alloc();
 149     if (!s->tmp_frame)
 150         return AVERROR(ENOMEM);
 151
 152     return 0;
 153 }
 154
 155 static void nppscale_uninit(AVFilterContext *ctx)
 156 {
 157     NPPScaleContext *s = ctx->priv;
 158     int i;
 159
 160     for (i = 0; i < FF_ARRAY_ELEMS(s->stages); i++) {
 161         av_frame_free(&s->stages[i].frame);
 162         av_buffer_unref(&s->stages[i].frames_ctx);
 163     }
 164     av_frame_free(&s->tmp_frame);
 165 }
 166
 167 static int nppscale_query_formats(AVFilterContext *ctx)
 168 {
 169     static const enum AVPixelFormat pixel_formats[] = {
 170         AV_PIX_FMT_CUDA, AV_PIX_FMT_NONE,
 171     };
 172     AVFilterFormats *pix_fmts  = ff_make_format_list(pixel_formats);
 173
 174     ff_set_common_formats(ctx, pix_fmts);
 175
 176     return 0;
 177 }
 178
 179 static int init_stage(NPPScaleStageContext *stage, AVBufferRef *device_ctx)
 180 {
 181     AVBufferRef *out_ref = NULL;
 182     AVHWFramesContext *out_ctx;
 183     int in_sw, in_sh, out_sw, out_sh;
 184     int ret, i;
 185
 186     av_pix_fmt_get_chroma_sub_sample(stage->in_fmt,  &in_sw,  &in_sh);
 187     av_pix_fmt_get_chroma_sub_sample(stage->out_fmt, &out_sw, &out_sh);
 188     if (!stage->planes_out[0].width) {
 189         stage->planes_out[0].width  = stage->planes_in[0].width;
 190         stage->planes_out[0].height = stage->planes_in[0].height;
 191     }
 192
 193     for (i = 1; i < FF_ARRAY_ELEMS(stage->planes_in); i++) {
 194         stage->planes_in[i].width   = stage->planes_in[0].width   >> in_sw;
 195         stage->planes_in[i].height  = stage->planes_in[0].height  >> in_sh;
 196         stage->planes_out[i].width  = stage->planes_out[0].width  >> out_sw;
 197         stage->planes_out[i].height = stage->planes_out[0].height >> out_sh;
 198     }
 199
 200     out_ref = av_hwframe_ctx_alloc(device_ctx);
 201     if (!out_ref)
 202         return AVERROR(ENOMEM);
 203     out_ctx = (AVHWFramesContext*)out_ref->data;
 204
 205     out_ctx->format    = AV_PIX_FMT_CUDA;
 206     out_ctx->sw_format = stage->out_fmt;
 207     out_ctx->width     = FFALIGN(stage->planes_out[0].width,  32);
 208     out_ctx->height    = FFALIGN(stage->planes_out[0].height, 32);
 209
 210     ret = av_hwframe_ctx_init(out_ref);
 211     if (ret < 0)
 212         goto fail;
 213
 214     av_frame_unref(stage->frame);
 215     ret = av_hwframe_get_buffer(out_ref, stage->frame, 0);
 216     if (ret < 0)
 217         goto fail;
 218
 219     stage->frame->width  = stage->planes_out[0].width;
 220     stage->frame->height = stage->planes_out[0].height;
 221
 222     av_buffer_unref(&stage->frames_ctx);
 223     stage->frames_ctx = out_ref;
 224
 225     return 0;
 226 fail:
 227     av_buffer_unref(&out_ref);
 228     return ret;
 229 }
 230
 231 static int format_is_supported(enum AVPixelFormat fmt)
 232 {
 233     int i;
 234
 235     for (i = 0; i < FF_ARRAY_ELEMS(supported_formats); i++)
 236         if (supported_formats[i] == fmt)
 237             return 1;
 238     return 0;
 239 }
 240
 241 static enum AVPixelFormat get_deinterleaved_format(enum AVPixelFormat fmt)
 242 {
 243     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
 244     int i, planes;
 245
 246     planes = av_pix_fmt_count_planes(fmt);
 247     if (planes == desc->nb_components)
 248         return fmt;
 249     for (i = 0; i < FF_ARRAY_ELEMS(deinterleaved_formats); i++)
 250         if (deinterleaved_formats[i][0] == fmt)
 251             return deinterleaved_formats[i][1];
 252     return AV_PIX_FMT_NONE;
 253 }
 254
 255 static int init_processing_chain(AVFilterContext *ctx, int in_width, int in_height,
 256                                  int out_width, int out_height)
 257 {
 258     NPPScaleContext *s = ctx->priv;
 259
 260     AVHWFramesContext *in_frames_ctx;
 261
 262     enum AVPixelFormat in_format;
 263     enum AVPixelFormat out_format;
 264     enum AVPixelFormat in_deinterleaved_format;
 265     enum AVPixelFormat out_deinterleaved_format;
 266
 267     int i, ret, last_stage = -1;
 268
 269     /* check that we have a hw context */
 270     if (!ctx->inputs[0]->hw_frames_ctx) {
 271         av_log(ctx, AV_LOG_ERROR, "No hw context provided on input\n");
 272         return AVERROR(EINVAL);
 273     }
 274     in_frames_ctx = (AVHWFramesContext*)ctx->inputs[0]->hw_frames_ctx->data;
 275     in_format     = in_frames_ctx->sw_format;
 276     out_format    = (s->format == AV_PIX_FMT_NONE) ? in_format : s->format;
 277
 278     if (!format_is_supported(in_format)) {
 279         av_log(ctx, AV_LOG_ERROR, "Unsupported input format: %s\n",
 280                av_get_pix_fmt_name(in_format));
 281         return AVERROR(ENOSYS);
 282     }
 283     if (!format_is_supported(out_format)) {
 284         av_log(ctx, AV_LOG_ERROR, "Unsupported output format: %s\n",
 285                av_get_pix_fmt_name(out_format));
 286         return AVERROR(ENOSYS);
 287     }
 288
 289     in_deinterleaved_format  = get_deinterleaved_format(in_format);
 290     out_deinterleaved_format = get_deinterleaved_format(out_format);
 291     if (in_deinterleaved_format  == AV_PIX_FMT_NONE ||
 292         out_deinterleaved_format == AV_PIX_FMT_NONE)
 293         return AVERROR_BUG;
 294
 295     /* figure out which stages need to be done */
 296     if (in_width != out_width || in_height != out_height ||
 297         in_deinterleaved_format != out_deinterleaved_format)
 298         s->stages[STAGE_RESIZE].stage_needed = 1;
 299
 300     if (!s->stages[STAGE_RESIZE].stage_needed && in_format == out_format)
 301         s->passthrough = 1;
 302
 303     if (!s->passthrough) {
 304         if (in_format != in_deinterleaved_format)
 305             s->stages[STAGE_DEINTERLEAVE].stage_needed = 1;
 306         if (out_format != out_deinterleaved_format)
 307             s->stages[STAGE_INTERLEAVE].stage_needed = 1;
 308     }
 309
 310     s->stages[STAGE_DEINTERLEAVE].in_fmt              = in_format;
 311     s->stages[STAGE_DEINTERLEAVE].out_fmt             = in_deinterleaved_format;
 312     s->stages[STAGE_DEINTERLEAVE].planes_in[0].width  = in_width;
 313     s->stages[STAGE_DEINTERLEAVE].planes_in[0].height = in_height;
 314
 315     s->stages[STAGE_RESIZE].in_fmt               = in_deinterleaved_format;
 316     s->stages[STAGE_RESIZE].out_fmt              = out_deinterleaved_format;
 317     s->stages[STAGE_RESIZE].planes_in[0].width   = in_width;
 318     s->stages[STAGE_RESIZE].planes_in[0].height  = in_height;
 319     s->stages[STAGE_RESIZE].planes_out[0].width  = out_width;
 320     s->stages[STAGE_RESIZE].planes_out[0].height = out_height;
 321
 322     s->stages[STAGE_INTERLEAVE].in_fmt              = out_deinterleaved_format;
 323     s->stages[STAGE_INTERLEAVE].out_fmt             = out_format;
 324     s->stages[STAGE_INTERLEAVE].planes_in[0].width  = out_width;
 325     s->stages[STAGE_INTERLEAVE].planes_in[0].height = out_height;
 326
 327     /* init the hardware contexts */
 328     for (i = 0; i < FF_ARRAY_ELEMS(s->stages); i++) {
 329         if (!s->stages[i].stage_needed)
 330             continue;
 331
 332         ret = init_stage(&s->stages[i], in_frames_ctx->device_ref);
 333         if (ret < 0)
 334             return ret;
 335
 336         last_stage = i;
 337     }
 338
 339     if (last_stage < 0)
 340         return 0;
 341     ctx->outputs[0]->hw_frames_ctx = av_buffer_ref(s->stages[last_stage].frames_ctx);
 342     if (!ctx->outputs[0]->hw_frames_ctx)
 343         return AVERROR(ENOMEM);
 344
 345     return 0;
 346 }
 347
 348 static int nppscale_config_props(AVFilterLink *outlink)
 349 {
 350     AVFilterContext *ctx = outlink->src;
 351     AVFilterLink *inlink = outlink->src->inputs[0];
 352     NPPScaleContext  *s = ctx->priv;
 353     int64_t w, h;
 354     double var_values[VARS_NB], res;
 355     char *expr;
 356     int ret;
 357
 358     var_values[VAR_PI]    = M_PI;
 359     var_values[VAR_PHI]   = M_PHI;
 360     var_values[VAR_E]     = M_E;
 361     var_values[VAR_IN_W]  = var_values[VAR_IW] = inlink->w;
 362     var_values[VAR_IN_H]  = var_values[VAR_IH] = inlink->h;
 363     var_values[VAR_OUT_W] = var_values[VAR_OW] = NAN;
 364     var_values[VAR_OUT_H] = var_values[VAR_OH] = NAN;
 365     var_values[VAR_A]     = (double) inlink->w / inlink->h;
 366     var_values[VAR_SAR]   = inlink->sample_aspect_ratio.num ?
 367         (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1;
 368     var_values[VAR_DAR]   = var_values[VAR_A] * var_values[VAR_SAR];
 369
 370     /* evaluate width and height */
 371     av_expr_parse_and_eval(&res, (expr = s->w_expr),
 372                            var_names, var_values,
 373                            NULL, NULL, NULL, NULL, NULL, 0, ctx);
 374     s->w = var_values[VAR_OUT_W] = var_values[VAR_OW] = res;
 375     if ((ret = av_expr_parse_and_eval(&res, (expr = s->h_expr),
 376                                       var_names, var_values,
 377                                       NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
 378         goto fail;
 379     s->h = var_values[VAR_OUT_H] = var_values[VAR_OH] = res;
 380     /* evaluate again the width, as it may depend on the output height */
 381     if ((ret = av_expr_parse_and_eval(&res, (expr = s->w_expr),
 382                                       var_names, var_values,
 383                                       NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0)
 384         goto fail;
 385     s->w = res;
 386
 387     w = s->w;
 388     h = s->h;
 389
 390     /* sanity check params */
 391     if (w <  -1 || h <  -1) {
 392         av_log(ctx, AV_LOG_ERROR, "Size values less than -1 are not acceptable.\n");
 393         return AVERROR(EINVAL);
 394     }
 395     if (w == -1 && h == -1)
 396         s->w = s->h = 0;
 397
 398     if (!(w = s->w))
 399         w = inlink->w;
 400     if (!(h = s->h))
 401         h = inlink->h;
 402     if (w == -1)
 403         w = av_rescale(h, inlink->w, inlink->h);
 404     if (h == -1)
 405         h = av_rescale(w, inlink->h, inlink->w);
 406
 407     if (w > INT_MAX || h > INT_MAX ||
 408         (h * inlink->w) > INT_MAX  ||
 409         (w * inlink->h) > INT_MAX)
 410         av_log(ctx, AV_LOG_ERROR, "Rescaled value for width or height is too big.\n");
 411
 412     outlink->w = w;
 413     outlink->h = h;
 414
 415     ret = init_processing_chain(ctx, inlink->w, inlink->h, w, h);
 416     if (ret < 0)
 417         return ret;
 418
 419     av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d -> w:%d h:%d\n",
 420            inlink->w, inlink->h, outlink->w, outlink->h);
 421
 422     if (inlink->sample_aspect_ratio.num)
 423         outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h*inlink->w,
 424                                                              outlink->w*inlink->h},
 425                                                 inlink->sample_aspect_ratio);
 426     else
 427         outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
 428
 429     return 0;
 430
 431 fail:
 432     av_log(NULL, AV_LOG_ERROR,
 433            "Error when evaluating the expression '%s'\n", expr);
 434     return ret;
 435 }
 436
 437 static int nppscale_deinterleave(AVFilterContext *ctx, NPPScaleStageContext *stage,
 438                                  AVFrame *out, AVFrame *in)
 439 {
 440     AVHWFramesContext *in_frames_ctx = (AVHWFramesContext*)in->hw_frames_ctx->data;
 441     NppStatus err;
 442
 443     switch (in_frames_ctx->sw_format) {
 444     case AV_PIX_FMT_NV12:
 445         err = nppiYCbCr420_8u_P2P3R(in->data[0], in->linesize[0],
 446                                     in->data[1], in->linesize[1],
 447                                     out->data, out->linesize,
 448                                     (NppiSize){ in->width, in->height });
 449         break;
 450     default:
 451         return AVERROR_BUG;
 452     }
 453     if (err != NPP_SUCCESS) {
 454         av_log(ctx, AV_LOG_ERROR, "NPP deinterleave error: %d\n", err);
 455         return AVERROR_UNKNOWN;
 456     }
 457
 458     return 0;
 459 }
 460
 461 static int nppscale_resize(AVFilterContext *ctx, NPPScaleStageContext *stage,
 462                            AVFrame *out, AVFrame *in)
 463 {
 464     NPPScaleContext *s = ctx->priv;
 465     NppStatus err;
 466     int i;
 467
 468     for (i = 0; i < FF_ARRAY_ELEMS(in->data) && in->data[i]; i++) {
 469         int iw = stage->planes_in[i].width;
 470         int ih = stage->planes_in[i].height;
 471         int ow = stage->planes_out[i].width;
 472         int oh = stage->planes_out[i].height;
 473
 474         err = nppiResizeSqrPixel_8u_C1R(in->data[i], (NppiSize){ iw, ih },
 475                                         in->linesize[i], (NppiRect){ 0, 0, iw, ih },
 476                                         out->data[i], out->linesize[i],
 477                                         (NppiRect){ 0, 0, ow, oh },
 478                                         (double)ow / iw, (double)oh / ih,
 479                                         0.0, 0.0, s->interp_algo);
 480         if (err != NPP_SUCCESS) {
 481             av_log(ctx, AV_LOG_ERROR, "NPP resize error: %d\n", err);
 482             return AVERROR_UNKNOWN;
 483         }
 484     }
 485
 486     return 0;
 487 }
 488
 489 static int nppscale_interleave(AVFilterContext *ctx, NPPScaleStageContext *stage,
 490                                AVFrame *out, AVFrame *in)
 491 {
 492     AVHWFramesContext *out_frames_ctx = (AVHWFramesContext*)out->hw_frames_ctx->data;
 493     NppStatus err;
 494
 495     switch (out_frames_ctx->sw_format) {
 496     case AV_PIX_FMT_NV12:
 497         err = nppiYCbCr420_8u_P3P2R((const uint8_t**)in->data,
 498                                     in->linesize,
 499                                     out->data[0], out->linesize[0],
 500                                     out->data[1], out->linesize[1],
 501                                     (NppiSize){ in->width, in->height });
 502         break;
 503     default:
 504         return AVERROR_BUG;
 505     }
 506     if (err != NPP_SUCCESS) {
 507         av_log(ctx, AV_LOG_ERROR, "NPP deinterleave error: %d\n", err);
 508         return AVERROR_UNKNOWN;
 509     }
 510
 511     return 0;
 512 }
 513
 514 static int (*const nppscale_process[])(AVFilterContext *ctx, NPPScaleStageContext *stage,
 515                                        AVFrame *out, AVFrame *in) = {
 516     [STAGE_DEINTERLEAVE] = nppscale_deinterleave,
 517     [STAGE_RESIZE]       = nppscale_resize,
 518     [STAGE_INTERLEAVE]   = nppscale_interleave,
 519 };
 520
 521 static int nppscale_scale(AVFilterContext *ctx, AVFrame *out, AVFrame *in)
 522 {
 523     NPPScaleContext *s = ctx->priv;
 524     AVFrame *src = in;
 525     int i, ret, last_stage = -1;
 526
 527     for (i = 0; i < FF_ARRAY_ELEMS(s->stages); i++) {
 528         if (!s->stages[i].stage_needed)
 529             continue;
 530
 531         ret = nppscale_process[i](ctx, &s->stages[i], s->stages[i].frame, src);
 532         if (ret < 0)
 533             return ret;
 534
 535         src        = s->stages[i].frame;
 536         last_stage = i;
 537     }
 538
 539     if (last_stage < 0)
 540         return AVERROR_BUG;
 541     ret = av_hwframe_get_buffer(src->hw_frames_ctx, s->tmp_frame, 0);
 542     if (ret < 0)
 543         return ret;
 544
 545     av_frame_move_ref(out, src);
 546     av_frame_move_ref(src, s->tmp_frame);
 547
 548     ret = av_frame_copy_props(out, in);
 549     if (ret < 0)
 550         return ret;
 551
 552     return 0;
 553 }
 554
 555 static int nppscale_filter_frame(AVFilterLink *link, AVFrame *in)
 556 {
 557     AVFilterContext              *ctx = link->dst;
 558     NPPScaleContext                *s = ctx->priv;
 559     AVFilterLink             *outlink = ctx->outputs[0];
 560     AVHWFramesContext     *frames_ctx = (AVHWFramesContext*)outlink->hw_frames_ctx->data;
 561     AVCUDADeviceContext *device_hwctx = frames_ctx->device_ctx->hwctx;
 562
 563     AVFrame *out = NULL;
 564     CUresult err;
 565     CUcontext dummy;
 566     int ret = 0;
 567
 568     if (s->passthrough)
 569         return ff_filter_frame(outlink, in);
 570
 571     out = av_frame_alloc();
 572     if (!out) {
 573         ret = AVERROR(ENOMEM);
 574         goto fail;
 575     }
 576
 577     av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den,
 578               (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,
 579               (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,
 580               INT_MAX);
 581
 582     err = cuCtxPushCurrent(device_hwctx->cuda_ctx);
 583     if (err != CUDA_SUCCESS) {
 584         ret = AVERROR_UNKNOWN;
 585         goto fail;
 586     }
 587
 588     ret = nppscale_scale(ctx, out, in);
 589
 590     cuCtxPopCurrent(&dummy);
 591     if (ret < 0)
 592         goto fail;
 593
 594     av_frame_free(&in);
 595     return ff_filter_frame(outlink, out);
 596 fail:
 597     av_frame_free(&in);
 598     av_frame_free(&out);
 599     return ret;
 600 }
 601
 602 #define OFFSET(x) offsetof(NPPScaleContext, x)
 603 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM
 604 static const AVOption options[] = {
 605     { "w",      "Output video width",  OFFSET(w_expr),     AV_OPT_TYPE_STRING, { .str = "iw"   }, .flags = FLAGS },
 606     { "h",      "Output video height", OFFSET(h_expr),     AV_OPT_TYPE_STRING, { .str = "ih"   }, .flags = FLAGS },
 607     { "format", "Output pixel format", OFFSET(format_str), AV_OPT_TYPE_STRING, { .str = "same" }, .flags = FLAGS },
 608
 609     { "interp_algo", "Interpolation algorithm used for resizing", OFFSET(interp_algo), AV_OPT_TYPE_INT, { .i64 = NPPI_INTER_CUBIC }, 0, INT_MAX, FLAGS, "interp_algo" },
 610         { "nn",                 "nearest neighbour",                 0, AV_OPT_TYPE_CONST, { .i64 = NPPI_INTER_NN                 }, 0, 0, FLAGS, "interp_algo" },
 611         { "linear",             "linear",                            0, AV_OPT_TYPE_CONST, { .i64 = NPPI_INTER_LINEAR             }, 0, 0, FLAGS, "interp_algo" },
 612         { "cubic",              "cubic",                             0, AV_OPT_TYPE_CONST, { .i64 = NPPI_INTER_CUBIC              }, 0, 0, FLAGS, "interp_algo" },
 613         { "cubic2p_bspline",    "2-parameter cubic (B=1, C=0)",      0, AV_OPT_TYPE_CONST, { .i64 = NPPI_INTER_CUBIC2P_BSPLINE    }, 0, 0, FLAGS, "interp_algo" },
 614         { "cubic2p_catmullrom", "2-parameter cubic (B=0, C=1/2)",    0, AV_OPT_TYPE_CONST, { .i64 = NPPI_INTER_CUBIC2P_CATMULLROM }, 0, 0, FLAGS, "interp_algo" },
 615         { "cubic2p_b05c03",     "2-parameter cubic (B=1/2, C=3/10)", 0, AV_OPT_TYPE_CONST, { .i64 = NPPI_INTER_CUBIC2P_B05C03     }, 0, 0, FLAGS, "interp_algo" },
 616         { "super",              "supersampling",                     0, AV_OPT_TYPE_CONST, { .i64 = NPPI_INTER_SUPER              }, 0, 0, FLAGS, "interp_algo" },
 617         { "lanczos",            "Lanczos",                           0, AV_OPT_TYPE_CONST, { .i64 = NPPI_INTER_LANCZOS            }, 0, 0, FLAGS, "interp_algo" },
 618     { NULL },
 619 };
 620
 621 static const AVClass nppscale_class = {
 622     .class_name = "nppscale",
 623     .item_name  = av_default_item_name,
 624     .option     = options,
 625     .version    = LIBAVUTIL_VERSION_INT,
 626 };
 627
 628 static const AVFilterPad nppscale_inputs[] = {
 629     {
 630         .name        = "default",
 631         .type        = AVMEDIA_TYPE_VIDEO,
 632         .filter_frame = nppscale_filter_frame,
 633     },
 634     { NULL }
 635 };
 636
 637 static const AVFilterPad nppscale_outputs[] = {
 638     {
 639         .name         = "default",
 640         .type         = AVMEDIA_TYPE_VIDEO,
 641         .config_props = nppscale_config_props,
 642     },
 643     { NULL }
 644 };
 645
 646 AVFilter ff_vf_scale_npp = {
 647     .name      = "scale_npp",
 648     .description = NULL_IF_CONFIG_SMALL("NVIDIA Performance Primitives video "
 649                                         "scaling and format conversion"),
 650
 651     .init          = nppscale_init,
 652     .uninit        = nppscale_uninit,
 653     .query_formats = nppscale_query_formats,
 654
 655     .priv_size = sizeof(NPPScaleContext),
 656     .priv_class = &nppscale_class,
 657
 658     .inputs    = nppscale_inputs,
 659     .outputs   = nppscale_outputs,
 660 };