libavcodec/vda_h264.c

   1 /*
   2  * VDA H.264 hardware acceleration
   3  *
   4  * copyright (c) 2011 Sebastien Zwickert
   5  *
   6  * This file is part of Libav.
   7  *
   8  * Libav is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * Libav 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 GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with Libav; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 #include <CoreFoundation/CFNumber.h>
  24 #include <CoreFoundation/CFData.h>
  25 #include <CoreFoundation/CFString.h>
  26
  27 #include "libavutil/avutil.h"
  28 #include "h264dec.h"
  29 #include "internal.h"
  30 #include "vda.h"
  31 #include "vda_internal.h"
  32
  33 typedef struct VDAContext {
  34     // The current bitstream buffer.
  35     uint8_t             *bitstream;
  36
  37     // The current size of the bitstream.
  38     int                  bitstream_size;
  39
  40     // The reference size used for fast reallocation.
  41     int                  allocated_size;
  42
  43     CVImageBufferRef frame;
  44 } VDAContext;
  45
  46 /* Decoder callback that adds the VDA frame to the queue in display order. */
  47 static void vda_decoder_callback(void *vda_hw_ctx,
  48                                  CFDictionaryRef user_info,
  49                                  OSStatus status,
  50                                  uint32_t infoFlags,
  51                                  CVImageBufferRef image_buffer)
  52 {
  53     struct vda_context *vda_ctx = vda_hw_ctx;
  54
  55     if (!image_buffer)
  56         return;
  57
  58     if (vda_ctx->cv_pix_fmt_type != CVPixelBufferGetPixelFormatType(image_buffer))
  59         return;
  60
  61     vda_ctx->cv_buffer = CVPixelBufferRetain(image_buffer);
  62 }
  63
  64 static int vda_sync_decode(VDAContext *ctx, struct vda_context *vda_ctx)
  65 {
  66     OSStatus status;
  67     CFDataRef coded_frame;
  68     uint32_t flush_flags = 1 << 0; ///< kVDADecoderFlush_emitFrames
  69
  70     coded_frame = CFDataCreate(kCFAllocatorDefault,
  71                                ctx->bitstream,
  72                                ctx->bitstream_size);
  73
  74     status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, NULL);
  75
  76     if (kVDADecoderNoErr == status)
  77         status = VDADecoderFlush(vda_ctx->decoder, flush_flags);
  78
  79     CFRelease(coded_frame);
  80
  81     return status;
  82 }
  83
  84
  85 static int vda_old_h264_start_frame(AVCodecContext *avctx,
  86                                 av_unused const uint8_t *buffer,
  87                                 av_unused uint32_t size)
  88 {
  89     VDAContext *vda = avctx->internal->hwaccel_priv_data;
  90     struct vda_context *vda_ctx         = avctx->hwaccel_context;
  91
  92     if (!vda_ctx->decoder)
  93         return -1;
  94
  95     vda->bitstream_size = 0;
  96
  97     return 0;
  98 }
  99
 100 static int vda_old_h264_decode_slice(AVCodecContext *avctx,
 101                                  const uint8_t *buffer,
 102                                  uint32_t size)
 103 {
 104     VDAContext *vda                     = avctx->internal->hwaccel_priv_data;
 105     struct vda_context *vda_ctx         = avctx->hwaccel_context;
 106     void *tmp;
 107
 108     if (!vda_ctx->decoder)
 109         return -1;
 110
 111     tmp = av_fast_realloc(vda->bitstream,
 112                           &vda->allocated_size,
 113                           vda->bitstream_size + size + 4);
 114     if (!tmp)
 115         return AVERROR(ENOMEM);
 116
 117     vda->bitstream = tmp;
 118
 119     AV_WB32(vda->bitstream + vda->bitstream_size, size);
 120     memcpy(vda->bitstream + vda->bitstream_size + 4, buffer, size);
 121
 122     vda->bitstream_size += size + 4;
 123
 124     return 0;
 125 }
 126
 127 static int vda_old_h264_end_frame(AVCodecContext *avctx)
 128 {
 129     H264Context *h                      = avctx->priv_data;
 130     VDAContext *vda                     = avctx->internal->hwaccel_priv_data;
 131     struct vda_context *vda_ctx         = avctx->hwaccel_context;
 132     AVFrame *frame                      = h->cur_pic_ptr->f;
 133     int status;
 134
 135     if (!vda_ctx->decoder || !vda->bitstream)
 136         return -1;
 137
 138     status = vda_sync_decode(vda, vda_ctx);
 139     frame->data[3] = (void*)vda_ctx->cv_buffer;
 140
 141     if (status)
 142         av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%d)\n", status);
 143
 144     return status;
 145 }
 146
 147 int ff_vda_create_decoder(struct vda_context *vda_ctx,
 148                           uint8_t *extradata,
 149                           int extradata_size)
 150 {
 151     OSStatus status = kVDADecoderNoErr;
 152     CFNumberRef height;
 153     CFNumberRef width;
 154     CFNumberRef format;
 155     CFDataRef avc_data;
 156     CFMutableDictionaryRef config_info;
 157     CFMutableDictionaryRef buffer_attributes;
 158     CFMutableDictionaryRef io_surface_properties;
 159     CFNumberRef cv_pix_fmt;
 160
 161     /* Each VCL NAL in the bitstream sent to the decoder
 162      * is preceded by a 4 bytes length header.
 163      * Change the avcC atom header if needed, to signal headers of 4 bytes. */
 164     if (extradata_size >= 4 && (extradata[4] & 0x03) != 0x03) {
 165         uint8_t *rw_extradata;
 166
 167         if (!(rw_extradata = av_malloc(extradata_size)))
 168             return AVERROR(ENOMEM);
 169
 170         memcpy(rw_extradata, extradata, extradata_size);
 171
 172         rw_extradata[4] |= 0x03;
 173
 174         avc_data = CFDataCreate(kCFAllocatorDefault, rw_extradata, extradata_size);
 175
 176         av_freep(&rw_extradata);
 177     } else {
 178         avc_data = CFDataCreate(kCFAllocatorDefault, extradata, extradata_size);
 179     }
 180
 181     config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
 182                                             4,
 183                                             &kCFTypeDictionaryKeyCallBacks,
 184                                             &kCFTypeDictionaryValueCallBacks);
 185
 186     height   = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->height);
 187     width    = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->width);
 188     format   = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->format);
 189
 190     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Height, height);
 191     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Width, width);
 192     CFDictionarySetValue(config_info, kVDADecoderConfiguration_SourceFormat, format);
 193     CFDictionarySetValue(config_info, kVDADecoderConfiguration_avcCData, avc_data);
 194
 195     buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
 196                                                   2,
 197                                                   &kCFTypeDictionaryKeyCallBacks,
 198                                                   &kCFTypeDictionaryValueCallBacks);
 199     io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
 200                                                       0,
 201                                                       &kCFTypeDictionaryKeyCallBacks,
 202                                                       &kCFTypeDictionaryValueCallBacks);
 203     cv_pix_fmt      = CFNumberCreate(kCFAllocatorDefault,
 204                                      kCFNumberSInt32Type,
 205                                      &vda_ctx->cv_pix_fmt_type);
 206     CFDictionarySetValue(buffer_attributes,
 207                          kCVPixelBufferPixelFormatTypeKey,
 208                          cv_pix_fmt);
 209     CFDictionarySetValue(buffer_attributes,
 210                          kCVPixelBufferIOSurfacePropertiesKey,
 211                          io_surface_properties);
 212
 213     status = VDADecoderCreate(config_info,
 214                               buffer_attributes,
 215                               (VDADecoderOutputCallback *)vda_decoder_callback,
 216                               vda_ctx,
 217                               &vda_ctx->decoder);
 218
 219     CFRelease(height);
 220     CFRelease(width);
 221     CFRelease(format);
 222     CFRelease(avc_data);
 223     CFRelease(config_info);
 224     CFRelease(io_surface_properties);
 225     CFRelease(cv_pix_fmt);
 226     CFRelease(buffer_attributes);
 227
 228     return status;
 229 }
 230
 231 int ff_vda_destroy_decoder(struct vda_context *vda_ctx)
 232 {
 233     OSStatus status = kVDADecoderNoErr;
 234
 235     if (vda_ctx->decoder)
 236         status = VDADecoderDestroy(vda_ctx->decoder);
 237
 238     return status;
 239 }
 240
 241 static int vda_h264_uninit(AVCodecContext *avctx)
 242 {
 243     VDAContext *vda = avctx->internal->hwaccel_priv_data;
 244     av_freep(&vda->bitstream);
 245     if (vda->frame)
 246         CVPixelBufferRelease(vda->frame);
 247     return 0;
 248 }
 249
 250 const AVHWAccel ff_h264_vda_old_hwaccel = {
 251     .name           = "h264_vda",
 252     .type           = AVMEDIA_TYPE_VIDEO,
 253     .id             = AV_CODEC_ID_H264,
 254     .pix_fmt        = AV_PIX_FMT_VDA_VLD,
 255     .start_frame    = vda_old_h264_start_frame,
 256     .decode_slice   = vda_old_h264_decode_slice,
 257     .end_frame      = vda_old_h264_end_frame,
 258     .uninit         = vda_h264_uninit,
 259     .priv_data_size = sizeof(VDAContext),
 260 };
 261
 262 void ff_vda_output_callback(void *opaque,
 263                             CFDictionaryRef user_info,
 264                             OSStatus status,
 265                             uint32_t infoFlags,
 266                             CVImageBufferRef image_buffer)
 267 {
 268     AVCodecContext *ctx = opaque;
 269     VDAContext *vda = ctx->internal->hwaccel_priv_data;
 270
 271
 272     if (vda->frame) {
 273         CVPixelBufferRelease(vda->frame);
 274         vda->frame = NULL;
 275     }
 276
 277     if (!image_buffer)
 278         return;
 279
 280     vda->frame = CVPixelBufferRetain(image_buffer);
 281 }
 282
 283 static int vda_h264_start_frame(AVCodecContext *avctx,
 284                                 const uint8_t *buffer,
 285                                 uint32_t size)
 286 {
 287     VDAContext *vda = avctx->internal->hwaccel_priv_data;
 288
 289     vda->bitstream_size = 0;
 290
 291     return 0;
 292 }
 293
 294 static int vda_h264_decode_slice(AVCodecContext *avctx,
 295                                  const uint8_t *buffer,
 296                                  uint32_t size)
 297 {
 298     VDAContext *vda       = avctx->internal->hwaccel_priv_data;
 299     void *tmp;
 300
 301     tmp = av_fast_realloc(vda->bitstream,
 302                           &vda->allocated_size,
 303                           vda->bitstream_size + size + 4);
 304     if (!tmp)
 305         return AVERROR(ENOMEM);
 306
 307     vda->bitstream = tmp;
 308
 309     AV_WB32(vda->bitstream + vda->bitstream_size, size);
 310     memcpy(vda->bitstream + vda->bitstream_size + 4, buffer, size);
 311
 312     vda->bitstream_size += size + 4;
 313
 314     return 0;
 315 }
 316
 317 static void release_buffer(void *opaque, uint8_t *data)
 318 {
 319     CVImageBufferRef frame = (CVImageBufferRef)data;
 320     CVPixelBufferRelease(frame);
 321 }
 322
 323 static int vda_h264_end_frame(AVCodecContext *avctx)
 324 {
 325     H264Context *h        = avctx->priv_data;
 326     VDAContext *vda       = avctx->internal->hwaccel_priv_data;
 327     AVVDAContext *vda_ctx = avctx->hwaccel_context;
 328     AVFrame *frame        = h->cur_pic_ptr->f;
 329     uint32_t flush_flags  = 1 << 0; ///< kVDADecoderFlush_emitFrames
 330     CFDataRef coded_frame;
 331     OSStatus status;
 332
 333     if (!vda->bitstream_size)
 334         return AVERROR_INVALIDDATA;
 335
 336
 337     coded_frame = CFDataCreate(kCFAllocatorDefault,
 338                                vda->bitstream,
 339                                vda->bitstream_size);
 340
 341     status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, NULL);
 342
 343     if (status == kVDADecoderNoErr)
 344         status = VDADecoderFlush(vda_ctx->decoder, flush_flags);
 345
 346     CFRelease(coded_frame);
 347
 348     if (!vda->frame)
 349         return AVERROR_UNKNOWN;
 350
 351     if (status != kVDADecoderNoErr) {
 352         av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%d)\n", status);
 353         return AVERROR_UNKNOWN;
 354     }
 355
 356     av_buffer_unref(&frame->buf[0]);
 357
 358     frame->buf[0] = av_buffer_create((uint8_t*)vda->frame,
 359                                      sizeof(vda->frame),
 360                                      release_buffer, NULL,
 361                                      AV_BUFFER_FLAG_READONLY);
 362     if (!frame->buf[0])
 363         return AVERROR(ENOMEM);
 364
 365     frame->data[3] = (uint8_t*)vda->frame;
 366     vda->frame = NULL;
 367
 368     return 0;
 369 }
 370
 371 int ff_vda_default_init(AVCodecContext *avctx)
 372 {
 373     AVVDAContext *vda_ctx = avctx->hwaccel_context;
 374     OSStatus status = kVDADecoderNoErr;
 375     CFNumberRef height;
 376     CFNumberRef width;
 377     CFNumberRef format;
 378     CFDataRef avc_data;
 379     CFMutableDictionaryRef config_info;
 380     CFMutableDictionaryRef buffer_attributes;
 381     CFMutableDictionaryRef io_surface_properties;
 382     CFNumberRef cv_pix_fmt;
 383     int32_t fmt = 'avc1', pix_fmt = vda_ctx->cv_pix_fmt_type;
 384
 385     // kCVPixelFormatType_420YpCbCr8Planar;
 386
 387     /* Each VCL NAL in the bitstream sent to the decoder
 388      * is preceded by a 4 bytes length header.
 389      * Change the avcC atom header if needed, to signal headers of 4 bytes. */
 390     if (avctx->extradata_size >= 4 && (avctx->extradata[4] & 0x03) != 0x03) {
 391         uint8_t *rw_extradata;
 392
 393         if (!(rw_extradata = av_malloc(avctx->extradata_size)))
 394             return AVERROR(ENOMEM);
 395
 396         memcpy(rw_extradata, avctx->extradata, avctx->extradata_size);
 397
 398         rw_extradata[4] |= 0x03;
 399
 400         avc_data = CFDataCreate(kCFAllocatorDefault, rw_extradata, avctx->extradata_size);
 401
 402         av_freep(&rw_extradata);
 403     } else {
 404         avc_data = CFDataCreate(kCFAllocatorDefault,
 405                                 avctx->extradata, avctx->extradata_size);
 406     }
 407
 408     config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
 409                                             4,
 410                                             &kCFTypeDictionaryKeyCallBacks,
 411                                             &kCFTypeDictionaryValueCallBacks);
 412
 413     height = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &avctx->height);
 414     width  = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &avctx->width);
 415     format = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &fmt);
 416     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Height, height);
 417     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Width, width);
 418     CFDictionarySetValue(config_info, kVDADecoderConfiguration_avcCData, avc_data);
 419     CFDictionarySetValue(config_info, kVDADecoderConfiguration_SourceFormat, format);
 420
 421     buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
 422                                                   2,
 423                                                   &kCFTypeDictionaryKeyCallBacks,
 424                                                   &kCFTypeDictionaryValueCallBacks);
 425     io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
 426                                                       0,
 427                                                       &kCFTypeDictionaryKeyCallBacks,
 428                                                       &kCFTypeDictionaryValueCallBacks);
 429     cv_pix_fmt      = CFNumberCreate(kCFAllocatorDefault,
 430                                      kCFNumberSInt32Type,
 431                                      &pix_fmt);
 432
 433     CFDictionarySetValue(buffer_attributes,
 434                          kCVPixelBufferPixelFormatTypeKey,
 435                          cv_pix_fmt);
 436     CFDictionarySetValue(buffer_attributes,
 437                          kCVPixelBufferIOSurfacePropertiesKey,
 438                          io_surface_properties);
 439
 440     status = VDADecoderCreate(config_info,
 441                               buffer_attributes,
 442                               (VDADecoderOutputCallback *)ff_vda_output_callback,
 443                               avctx,
 444                               &vda_ctx->decoder);
 445
 446     CFRelease(format);
 447     CFRelease(height);
 448     CFRelease(width);
 449     CFRelease(avc_data);
 450     CFRelease(config_info);
 451     CFRelease(cv_pix_fmt);
 452     CFRelease(io_surface_properties);
 453     CFRelease(buffer_attributes);
 454
 455     if (status != kVDADecoderNoErr) {
 456         av_log(avctx, AV_LOG_ERROR, "Cannot initialize VDA %d\n", status);
 457     }
 458
 459     switch (status) {
 460     case kVDADecoderHardwareNotSupportedErr:
 461     case kVDADecoderFormatNotSupportedErr:
 462         return AVERROR(ENOSYS);
 463     case kVDADecoderConfigurationError:
 464         return AVERROR(EINVAL);
 465     case kVDADecoderDecoderFailedErr:
 466         return AVERROR_INVALIDDATA;
 467     case kVDADecoderNoErr:
 468         return 0;
 469     default:
 470         return AVERROR_UNKNOWN;
 471     }
 472 }
 473
 474 static int vda_h264_alloc_frame(AVCodecContext *avctx, AVFrame *frame)
 475 {
 476     frame->width  = avctx->width;
 477     frame->height = avctx->height;
 478     frame->format = avctx->pix_fmt;
 479     frame->buf[0] = av_buffer_alloc(1);
 480
 481     if (!frame->buf[0])
 482         return AVERROR(ENOMEM);
 483     return 0;
 484 }
 485
 486 const AVHWAccel ff_h264_vda_hwaccel = {
 487     .name           = "h264_vda",
 488     .type           = AVMEDIA_TYPE_VIDEO,
 489     .id             = AV_CODEC_ID_H264,
 490     .pix_fmt        = AV_PIX_FMT_VDA,
 491     .alloc_frame    = vda_h264_alloc_frame,
 492     .start_frame    = vda_h264_start_frame,
 493     .decode_slice   = vda_h264_decode_slice,
 494     .end_frame      = vda_h264_end_frame,
 495     .uninit         = vda_h264_uninit,
 496     .priv_data_size = sizeof(VDAContext),
 497 };