libavfilter/vf_scale_vaapi.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 #include <string.h>
  20
  21 #include <va/va.h>
  22 #include <va/va_vpp.h>
  23
  24 #include "libavutil/avassert.h"
  25 #include "libavutil/hwcontext.h"
  26 #include "libavutil/hwcontext_vaapi.h"
  27 #include "libavutil/mem.h"
  28 #include "libavutil/opt.h"
  29 #include "libavutil/pixdesc.h"
  30
  31 #include "avfilter.h"
  32 #include "formats.h"
  33 #include "internal.h"
  34
  35 typedef struct ScaleVAAPIContext {
  36     const AVClass *class;
  37
  38     AVVAAPIDeviceContext *hwctx;
  39     AVBufferRef *device_ref;
  40
  41     int valid_ids;
  42     VAConfigID  va_config;
  43     VAContextID va_context;
  44
  45     AVBufferRef       *input_frames_ref;
  46     AVHWFramesContext *input_frames;
  47
  48     AVBufferRef       *output_frames_ref;
  49     AVHWFramesContext *output_frames;
  50
  51     char *output_format_string;
  52     enum AVPixelFormat output_format;
  53     int output_width;
  54     int output_height;
  55
  56 } ScaleVAAPIContext;
  57
  58
  59 static int scale_vaapi_query_formats(AVFilterContext *avctx)
  60 {
  61     enum AVPixelFormat pix_fmts[] = {
  62         AV_PIX_FMT_VAAPI, AV_PIX_FMT_NONE,
  63     };
  64
  65     ff_formats_ref(ff_make_format_list(pix_fmts),
  66                    &avctx->inputs[0]->out_formats);
  67     ff_formats_ref(ff_make_format_list(pix_fmts),
  68                    &avctx->outputs[0]->in_formats);
  69
  70     return 0;
  71 }
  72
  73 static int scale_vaapi_pipeline_uninit(ScaleVAAPIContext *ctx)
  74 {
  75     if (ctx->va_context != VA_INVALID_ID) {
  76         vaDestroyContext(ctx->hwctx->display, ctx->va_context);
  77         ctx->va_context = VA_INVALID_ID;
  78     }
  79
  80     if (ctx->va_config != VA_INVALID_ID) {
  81         vaDestroyConfig(ctx->hwctx->display, ctx->va_config);
  82         ctx->va_config = VA_INVALID_ID;
  83     }
  84
  85     av_buffer_unref(&ctx->output_frames_ref);
  86     av_buffer_unref(&ctx->device_ref);
  87     ctx->hwctx = 0;
  88
  89     return 0;
  90 }
  91
  92 static int scale_vaapi_config_input(AVFilterLink *inlink)
  93 {
  94     AVFilterContext *avctx = inlink->dst;
  95     ScaleVAAPIContext *ctx = avctx->priv;
  96
  97     scale_vaapi_pipeline_uninit(ctx);
  98
  99     if (!inlink->hw_frames_ctx) {
 100         av_log(avctx, AV_LOG_ERROR, "A hardware frames reference is "
 101                "required to associate the processing device.\n");
 102         return AVERROR(EINVAL);
 103     }
 104
 105     ctx->input_frames_ref = av_buffer_ref(inlink->hw_frames_ctx);
 106     ctx->input_frames = (AVHWFramesContext*)ctx->input_frames_ref->data;
 107
 108     return 0;
 109 }
 110
 111 static int scale_vaapi_config_output(AVFilterLink *outlink)
 112 {
 113     AVFilterContext *avctx = outlink->src;
 114     ScaleVAAPIContext *ctx = avctx->priv;
 115     AVVAAPIHWConfig *hwconfig = NULL;
 116     AVHWFramesConstraints *constraints = NULL;
 117     AVVAAPIFramesContext *va_frames;
 118     VAStatus vas;
 119     int err, i;
 120
 121     scale_vaapi_pipeline_uninit(ctx);
 122
 123     ctx->device_ref = av_buffer_ref(ctx->input_frames->device_ref);
 124     ctx->hwctx = ((AVHWDeviceContext*)ctx->device_ref->data)->hwctx;
 125
 126     av_assert0(ctx->va_config == VA_INVALID_ID);
 127     vas = vaCreateConfig(ctx->hwctx->display, VAProfileNone,
 128                          VAEntrypointVideoProc, 0, 0, &ctx->va_config);
 129     if (vas != VA_STATUS_SUCCESS) {
 130         av_log(ctx, AV_LOG_ERROR, "Failed to create processing pipeline "
 131                "config: %d (%s).\n", vas, vaErrorStr(vas));
 132         err = AVERROR(EIO);
 133         goto fail;
 134     }
 135
 136     hwconfig = av_hwdevice_hwconfig_alloc(ctx->device_ref);
 137     if (!hwconfig) {
 138         err = AVERROR(ENOMEM);
 139         goto fail;
 140     }
 141     hwconfig->config_id = ctx->va_config;
 142
 143     constraints = av_hwdevice_get_hwframe_constraints(ctx->device_ref,
 144                                                       hwconfig);
 145     if (!constraints) {
 146         err = AVERROR(ENOMEM);
 147         goto fail;
 148     }
 149
 150     if (ctx->output_format == AV_PIX_FMT_NONE)
 151         ctx->output_format = ctx->input_frames->sw_format;
 152     if (constraints->valid_sw_formats) {
 153         for (i = 0; constraints->valid_sw_formats[i] != AV_PIX_FMT_NONE; i++) {
 154             if (ctx->output_format == constraints->valid_sw_formats[i])
 155                 break;
 156         }
 157         if (constraints->valid_sw_formats[i] == AV_PIX_FMT_NONE) {
 158             av_log(ctx, AV_LOG_ERROR, "Hardware does not support output "
 159                    "format %s.\n", av_get_pix_fmt_name(ctx->output_format));
 160             err = AVERROR(EINVAL);
 161             goto fail;
 162         }
 163     }
 164
 165     if (ctx->output_width  < constraints->min_width  ||
 166         ctx->output_height < constraints->min_height ||
 167         ctx->output_width  > constraints->max_width  ||
 168         ctx->output_height > constraints->max_height) {
 169         av_log(ctx, AV_LOG_ERROR, "Hardware does not support scaling to "
 170                "size %dx%d (constraints: width %d-%d height %d-%d).\n",
 171                ctx->output_width, ctx->output_height,
 172                constraints->min_width,  constraints->max_width,
 173                constraints->min_height, constraints->max_height);
 174         err = AVERROR(EINVAL);
 175         goto fail;
 176     }
 177
 178     ctx->output_frames_ref = av_hwframe_ctx_alloc(ctx->device_ref);
 179     if (!ctx->output_frames_ref) {
 180         av_log(ctx, AV_LOG_ERROR, "Failed to create HW frame context "
 181                "for output.\n");
 182         err = AVERROR(ENOMEM);
 183         goto fail;
 184     }
 185
 186     ctx->output_frames = (AVHWFramesContext*)ctx->output_frames_ref->data;
 187
 188     ctx->output_frames->format    = AV_PIX_FMT_VAAPI;
 189     ctx->output_frames->sw_format = ctx->output_format;
 190     ctx->output_frames->width     = ctx->output_width;
 191     ctx->output_frames->height    = ctx->output_height;
 192
 193     // The number of output frames we need is determined by what follows
 194     // the filter.  If it's an encoder with complex frame reference
 195     // structures then this could be very high.
 196     ctx->output_frames->initial_pool_size = 10;
 197
 198     err = av_hwframe_ctx_init(ctx->output_frames_ref);
 199     if (err < 0) {
 200         av_log(ctx, AV_LOG_ERROR, "Failed to initialise VAAPI frame "
 201                "context for output: %d\n", err);
 202         goto fail;
 203     }
 204
 205     va_frames = ctx->output_frames->hwctx;
 206
 207     av_assert0(ctx->va_context == VA_INVALID_ID);
 208     vas = vaCreateContext(ctx->hwctx->display, ctx->va_config,
 209                           ctx->output_width, ctx->output_height,
 210                           VA_PROGRESSIVE,
 211                           va_frames->surface_ids, va_frames->nb_surfaces,
 212                           &ctx->va_context);
 213     if (vas != VA_STATUS_SUCCESS) {
 214         av_log(ctx, AV_LOG_ERROR, "Failed to create processing pipeline "
 215                "context: %d (%s).\n", vas, vaErrorStr(vas));
 216         return AVERROR(EIO);
 217     }
 218
 219     outlink->w = ctx->output_width;
 220     outlink->h = ctx->output_height;
 221
 222     outlink->hw_frames_ctx = av_buffer_ref(ctx->output_frames_ref);
 223     if (!outlink->hw_frames_ctx) {
 224         err = AVERROR(ENOMEM);
 225         goto fail;
 226     }
 227
 228     av_freep(&hwconfig);
 229     av_hwframe_constraints_free(&constraints);
 230     return 0;
 231
 232 fail:
 233     av_buffer_unref(&ctx->output_frames_ref);
 234     av_freep(&hwconfig);
 235     av_hwframe_constraints_free(&constraints);
 236     return err;
 237 }
 238
 239 static int vaapi_proc_colour_standard(enum AVColorSpace av_cs)
 240 {
 241     switch(av_cs) {
 242 #define CS(av, va) case AVCOL_SPC_ ## av: return VAProcColorStandard ## va;
 243         CS(BT709,     BT709);
 244         CS(BT470BG,   BT601);
 245         CS(SMPTE170M, SMPTE170M);
 246         CS(SMPTE240M, SMPTE240M);
 247 #undef CS
 248     default:
 249         return VAProcColorStandardNone;
 250     }
 251 }
 252
 253 static int scale_vaapi_filter_frame(AVFilterLink *inlink, AVFrame *input_frame)
 254 {
 255     AVFilterContext *avctx = inlink->dst;
 256     AVFilterLink *outlink = avctx->outputs[0];
 257     ScaleVAAPIContext *ctx = avctx->priv;
 258     AVFrame *output_frame = NULL;
 259     VASurfaceID input_surface, output_surface;
 260     VAProcPipelineParameterBuffer params;
 261     VABufferID params_id;
 262     VAStatus vas;
 263     int err;
 264
 265     av_log(ctx, AV_LOG_DEBUG, "Filter input: %s, %ux%u (%"PRId64").\n",
 266            av_get_pix_fmt_name(input_frame->format),
 267            input_frame->width, input_frame->height, input_frame->pts);
 268
 269     if (ctx->va_context == VA_INVALID_ID)
 270         return AVERROR(EINVAL);
 271
 272     input_surface = (VASurfaceID)(uintptr_t)input_frame->data[3];
 273     av_log(ctx, AV_LOG_DEBUG, "Using surface %#x for scale input.\n",
 274            input_surface);
 275
 276     output_frame = av_frame_alloc();
 277     if (!output_frame) {
 278         av_log(ctx, AV_LOG_ERROR, "Failed to allocate output frame.");
 279         err = AVERROR(ENOMEM);
 280         goto fail;
 281     }
 282
 283     err = av_hwframe_get_buffer(ctx->output_frames_ref, output_frame, 0);
 284     if (err < 0) {
 285         av_log(ctx, AV_LOG_ERROR, "Failed to get surface for "
 286                "output: %d\n.", err);
 287     }
 288
 289     output_surface = (VASurfaceID)(uintptr_t)output_frame->data[3];
 290     av_log(ctx, AV_LOG_DEBUG, "Using surface %#x for scale output.\n",
 291            output_surface);
 292
 293     memset(&params, 0, sizeof(params));
 294
 295     params.surface = input_surface;
 296     params.surface_region = 0;
 297     params.surface_color_standard =
 298         vaapi_proc_colour_standard(input_frame->colorspace);
 299
 300     params.output_region = 0;
 301     params.output_background_color = 0xff000000;
 302     params.output_color_standard = params.surface_color_standard;
 303
 304     params.pipeline_flags = 0;
 305     params.filter_flags = VA_FILTER_SCALING_HQ;
 306
 307     vas = vaBeginPicture(ctx->hwctx->display,
 308                          ctx->va_context, output_surface);
 309     if (vas != VA_STATUS_SUCCESS) {
 310         av_log(ctx, AV_LOG_ERROR, "Failed to attach new picture: "
 311                "%d (%s).\n", vas, vaErrorStr(vas));
 312         err = AVERROR(EIO);
 313         goto fail;
 314     }
 315
 316     vas = vaCreateBuffer(ctx->hwctx->display, ctx->va_context,
 317                          VAProcPipelineParameterBufferType,
 318                          sizeof(params), 1, &params, &params_id);
 319     if (vas != VA_STATUS_SUCCESS) {
 320         av_log(ctx, AV_LOG_ERROR, "Failed to create parameter buffer: "
 321                "%d (%s).\n", vas, vaErrorStr(vas));
 322         err = AVERROR(EIO);
 323         goto fail_after_begin;
 324     }
 325     av_log(ctx, AV_LOG_DEBUG, "Pipeline parameter buffer is %#x.\n",
 326            params_id);
 327
 328     vas = vaRenderPicture(ctx->hwctx->display, ctx->va_context,
 329                           &params_id, 1);
 330     if (vas != VA_STATUS_SUCCESS) {
 331         av_log(ctx, AV_LOG_ERROR, "Failed to render parameter buffer: "
 332                "%d (%s).\n", vas, vaErrorStr(vas));
 333         err = AVERROR(EIO);
 334         goto fail_after_begin;
 335     }
 336
 337     vas = vaEndPicture(ctx->hwctx->display, ctx->va_context);
 338     if (vas != VA_STATUS_SUCCESS) {
 339         av_log(ctx, AV_LOG_ERROR, "Failed to start picture processing: "
 340                "%d (%s).\n", vas, vaErrorStr(vas));
 341         err = AVERROR(EIO);
 342         goto fail_after_render;
 343     }
 344
 345     // This doesn't get freed automatically for some reason.
 346     vas = vaDestroyBuffer(ctx->hwctx->display, params_id);
 347     if (vas != VA_STATUS_SUCCESS) {
 348         av_log(ctx, AV_LOG_ERROR, "Failed to free parameter buffer: "
 349                "%d (%s).\n", vas, vaErrorStr(vas));
 350         err = AVERROR(EIO);
 351         goto fail;
 352     }
 353
 354     av_frame_copy_props(output_frame, input_frame);
 355     av_frame_free(&input_frame);
 356
 357     av_log(ctx, AV_LOG_DEBUG, "Filter output: %s, %ux%u (%"PRId64").\n",
 358            av_get_pix_fmt_name(output_frame->format),
 359            output_frame->width, output_frame->height, output_frame->pts);
 360
 361     return ff_filter_frame(outlink, output_frame);
 362
 363     // We want to make sure that if vaBeginPicture has been called, we also
 364     // call vaRenderPicture and vaEndPicture.  These calls may well fail or
 365     // do something else nasty, but once we're in this failure case there
 366     // isn't much else we can do.
 367 fail_after_begin:
 368     vaRenderPicture(ctx->hwctx->display, ctx->va_context, &params_id, 1);
 369 fail_after_render:
 370     vaEndPicture(ctx->hwctx->display, ctx->va_context);
 371 fail:
 372     av_frame_free(&input_frame);
 373     av_frame_free(&output_frame);
 374     return err;
 375 }
 376
 377 static av_cold int scale_vaapi_init(AVFilterContext *avctx)
 378 {
 379     ScaleVAAPIContext *ctx = avctx->priv;
 380
 381     ctx->va_config  = VA_INVALID_ID;
 382     ctx->va_context = VA_INVALID_ID;
 383     ctx->valid_ids  = 1;
 384
 385     if (ctx->output_format_string) {
 386         ctx->output_format = av_get_pix_fmt(ctx->output_format_string);
 387         if (ctx->output_format == AV_PIX_FMT_NONE) {
 388             av_log(ctx, AV_LOG_ERROR, "Invalid output format.\n");
 389             return AVERROR(EINVAL);
 390         }
 391     } else {
 392         // Use the input format once that is configured.
 393         ctx->output_format = AV_PIX_FMT_NONE;
 394     }
 395
 396     return 0;
 397 }
 398
 399 static av_cold void scale_vaapi_uninit(AVFilterContext *avctx)
 400 {
 401     ScaleVAAPIContext *ctx = avctx->priv;
 402
 403     if (ctx->valid_ids)
 404         scale_vaapi_pipeline_uninit(ctx);
 405
 406     av_buffer_unref(&ctx->input_frames_ref);
 407     av_buffer_unref(&ctx->output_frames_ref);
 408     av_buffer_unref(&ctx->device_ref);
 409 }
 410
 411
 412 #define OFFSET(x) offsetof(ScaleVAAPIContext, x)
 413 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM)
 414 static const AVOption scale_vaapi_options[] = {
 415     { "w", "Output video width",
 416       OFFSET(output_width),  AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, .flags = FLAGS },
 417     { "h", "Output video height",
 418       OFFSET(output_height), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, .flags = FLAGS },
 419     { "format", "Output video format (software format of hardware frames)",
 420       OFFSET(output_format_string), AV_OPT_TYPE_STRING, .flags = FLAGS },
 421     { NULL },
 422 };
 423
 424 static const AVClass scale_vaapi_class = {
 425     .class_name = "scale_vaapi",
 426     .item_name  = av_default_item_name,
 427     .option     = scale_vaapi_options,
 428     .version    = LIBAVUTIL_VERSION_INT,
 429 };
 430
 431 static const AVFilterPad scale_vaapi_inputs[] = {
 432     {
 433         .name         = "default",
 434         .type         = AVMEDIA_TYPE_VIDEO,
 435         .filter_frame = &scale_vaapi_filter_frame,
 436         .config_props = &scale_vaapi_config_input,
 437     },
 438     { NULL }
 439 };
 440
 441 static const AVFilterPad scale_vaapi_outputs[] = {
 442     {
 443         .name = "default",
 444         .type = AVMEDIA_TYPE_VIDEO,
 445         .config_props = &scale_vaapi_config_output,
 446     },
 447     { NULL }
 448 };
 449
 450 AVFilter ff_vf_scale_vaapi = {
 451     .name          = "scale_vaapi",
 452     .description   = NULL_IF_CONFIG_SMALL("Scale to/from VAAPI surfaces."),
 453     .priv_size     = sizeof(ScaleVAAPIContext),
 454     .init          = &scale_vaapi_init,
 455     .uninit        = &scale_vaapi_uninit,
 456     .query_formats = &scale_vaapi_query_formats,
 457     .inputs        = scale_vaapi_inputs,
 458     .outputs       = scale_vaapi_outputs,
 459     .priv_class    = &scale_vaapi_class,
 460 };