libavcodec/vda_h264.c

   1 /*
   2  * VDA H264 HW acceleration.
   3  *
   4  * copyright (c) 2011 Sebastien Zwickert
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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/CFDictionary.h>
  24 #include <CoreFoundation/CFNumber.h>
  25 #include <CoreFoundation/CFData.h>
  26
  27 #include "vda.h"
  28 #include "libavutil/avutil.h"
  29 #include "h264dec.h"
  30
  31 struct vda_buffer {
  32     CVPixelBufferRef cv_buffer;
  33 };
  34 #include "internal.h"
  35 #include "vda_vt_internal.h"
  36
  37 /* Decoder callback that adds the vda frame to the queue in display order. */
  38 static void vda_decoder_callback(void *vda_hw_ctx,
  39                                  CFDictionaryRef user_info,
  40                                  OSStatus status,
  41                                  uint32_t infoFlags,
  42                                  CVImageBufferRef image_buffer)
  43 {
  44     struct vda_context *vda_ctx = vda_hw_ctx;
  45
  46     if (infoFlags & kVDADecodeInfo_FrameDropped)
  47         vda_ctx->cv_buffer = NULL;
  48
  49     if (!image_buffer)
  50         return;
  51
  52     if (vda_ctx->cv_pix_fmt_type != CVPixelBufferGetPixelFormatType(image_buffer))
  53         return;
  54
  55     vda_ctx->cv_buffer = CVPixelBufferRetain(image_buffer);
  56 }
  57
  58 static int vda_sync_decode(VTContext *ctx, struct vda_context *vda_ctx)
  59 {
  60     OSStatus status;
  61     CFDataRef coded_frame;
  62     uint32_t flush_flags = 1 << 0; ///< kVDADecoderFlush_emitFrames
  63
  64     coded_frame = CFDataCreate(kCFAllocatorDefault,
  65                                ctx->bitstream,
  66                                ctx->bitstream_size);
  67
  68     status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, NULL);
  69
  70     if (kVDADecoderNoErr == status)
  71         status = VDADecoderFlush(vda_ctx->decoder, flush_flags);
  72
  73     CFRelease(coded_frame);
  74
  75     return status;
  76 }
  77
  78
  79 static int vda_old_h264_start_frame(AVCodecContext *avctx,
  80                                 av_unused const uint8_t *buffer,
  81                                 av_unused uint32_t size)
  82 {
  83     VTContext *vda = avctx->internal->hwaccel_priv_data;
  84     struct vda_context *vda_ctx = avctx->hwaccel_context;
  85
  86     if (!vda_ctx->decoder)
  87         return -1;
  88
  89     vda->bitstream_size = 0;
  90
  91     return 0;
  92 }
  93
  94 static int vda_old_h264_decode_slice(AVCodecContext *avctx,
  95                                  const uint8_t *buffer,
  96                                  uint32_t size)
  97 {
  98     VTContext *vda              = avctx->internal->hwaccel_priv_data;
  99     struct vda_context *vda_ctx = avctx->hwaccel_context;
 100     void *tmp;
 101
 102     if (!vda_ctx->decoder)
 103         return -1;
 104
 105     tmp = av_fast_realloc(vda->bitstream,
 106                           &vda->allocated_size,
 107                           vda->bitstream_size + size + 4);
 108     if (!tmp)
 109         return AVERROR(ENOMEM);
 110
 111     vda->bitstream = tmp;
 112
 113     AV_WB32(vda->bitstream + vda->bitstream_size, size);
 114     memcpy(vda->bitstream + vda->bitstream_size + 4, buffer, size);
 115
 116     vda->bitstream_size += size + 4;
 117
 118     return 0;
 119 }
 120
 121 static void vda_h264_release_buffer(void *opaque, uint8_t *data)
 122 {
 123     struct vda_buffer *context = opaque;
 124     CVPixelBufferRelease(context->cv_buffer);
 125     av_free(context);
 126 }
 127
 128 static int vda_old_h264_end_frame(AVCodecContext *avctx)
 129 {
 130     H264Context *h                      = avctx->priv_data;
 131     VTContext *vda                      = avctx->internal->hwaccel_priv_data;
 132     struct vda_context *vda_ctx         = avctx->hwaccel_context;
 133     AVFrame *frame                      = h->cur_pic_ptr->f;
 134     struct vda_buffer *context;
 135     AVBufferRef *buffer;
 136     int status;
 137
 138     if (!vda_ctx->decoder || !vda->bitstream)
 139         return -1;
 140
 141     status = vda_sync_decode(vda, vda_ctx);
 142     frame->data[3] = (void*)vda_ctx->cv_buffer;
 143
 144     if (status)
 145         av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%d)\n", status);
 146
 147     if (!vda_ctx->use_ref_buffer || status)
 148         return status;
 149
 150     context = av_mallocz(sizeof(*context));
 151     buffer = av_buffer_create(NULL, 0, vda_h264_release_buffer, context, 0);
 152     if (!context || !buffer) {
 153         CVPixelBufferRelease(vda_ctx->cv_buffer);
 154         av_free(context);
 155         return -1;
 156     }
 157
 158     context->cv_buffer = vda_ctx->cv_buffer;
 159     frame->buf[3] = buffer;
 160
 161     return status;
 162 }
 163
 164 int ff_vda_create_decoder(struct vda_context *vda_ctx,
 165                           uint8_t *extradata,
 166                           int extradata_size)
 167 {
 168     OSStatus status;
 169     CFNumberRef height;
 170     CFNumberRef width;
 171     CFNumberRef format;
 172     CFDataRef avc_data;
 173     CFMutableDictionaryRef config_info;
 174     CFMutableDictionaryRef buffer_attributes;
 175     CFMutableDictionaryRef io_surface_properties;
 176     CFNumberRef cv_pix_fmt;
 177
 178     vda_ctx->priv_bitstream = NULL;
 179     vda_ctx->priv_allocated_size = 0;
 180
 181     /* Each VCL NAL in the bitstream sent to the decoder
 182      * is preceded by a 4 bytes length header.
 183      * Change the avcC atom header if needed, to signal headers of 4 bytes. */
 184     if (extradata_size >= 4 && (extradata[4] & 0x03) != 0x03) {
 185         uint8_t *rw_extradata;
 186
 187         if (!(rw_extradata = av_malloc(extradata_size)))
 188             return AVERROR(ENOMEM);
 189
 190         memcpy(rw_extradata, extradata, extradata_size);
 191
 192         rw_extradata[4] |= 0x03;
 193
 194         avc_data = CFDataCreate(kCFAllocatorDefault, rw_extradata, extradata_size);
 195
 196         av_freep(&rw_extradata);
 197     } else {
 198         avc_data = CFDataCreate(kCFAllocatorDefault, extradata, extradata_size);
 199     }
 200
 201     config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
 202                                             4,
 203                                             &kCFTypeDictionaryKeyCallBacks,
 204                                             &kCFTypeDictionaryValueCallBacks);
 205
 206     height   = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->height);
 207     width    = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->width);
 208     format   = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->format);
 209
 210     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Height, height);
 211     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Width, width);
 212     CFDictionarySetValue(config_info, kVDADecoderConfiguration_SourceFormat, format);
 213     CFDictionarySetValue(config_info, kVDADecoderConfiguration_avcCData, avc_data);
 214
 215     buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
 216                                                   2,
 217                                                   &kCFTypeDictionaryKeyCallBacks,
 218                                                   &kCFTypeDictionaryValueCallBacks);
 219     io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
 220                                                       0,
 221                                                       &kCFTypeDictionaryKeyCallBacks,
 222                                                       &kCFTypeDictionaryValueCallBacks);
 223     cv_pix_fmt  = CFNumberCreate(kCFAllocatorDefault,
 224                                  kCFNumberSInt32Type,
 225                                  &vda_ctx->cv_pix_fmt_type);
 226     CFDictionarySetValue(buffer_attributes,
 227                          kCVPixelBufferPixelFormatTypeKey,
 228                          cv_pix_fmt);
 229     CFDictionarySetValue(buffer_attributes,
 230                          kCVPixelBufferIOSurfacePropertiesKey,
 231                          io_surface_properties);
 232
 233     status = VDADecoderCreate(config_info,
 234                               buffer_attributes,
 235                               (VDADecoderOutputCallback *)vda_decoder_callback,
 236                               vda_ctx,
 237                               &vda_ctx->decoder);
 238
 239     CFRelease(height);
 240     CFRelease(width);
 241     CFRelease(format);
 242     CFRelease(avc_data);
 243     CFRelease(config_info);
 244     CFRelease(io_surface_properties);
 245     CFRelease(cv_pix_fmt);
 246     CFRelease(buffer_attributes);
 247
 248     return status;
 249 }
 250
 251 int ff_vda_destroy_decoder(struct vda_context *vda_ctx)
 252 {
 253     OSStatus status = kVDADecoderNoErr;
 254
 255     if (vda_ctx->decoder)
 256         status = VDADecoderDestroy(vda_ctx->decoder);
 257
 258     return status;
 259 }
 260
 261 AVHWAccel ff_h264_vda_old_hwaccel = {
 262     .name           = "h264_vda",
 263     .type           = AVMEDIA_TYPE_VIDEO,
 264     .id             = AV_CODEC_ID_H264,
 265     .pix_fmt        = AV_PIX_FMT_VDA_VLD,
 266     .start_frame    = vda_old_h264_start_frame,
 267     .decode_slice   = vda_old_h264_decode_slice,
 268     .end_frame      = vda_old_h264_end_frame,
 269     .uninit         = ff_videotoolbox_uninit,
 270     .priv_data_size = sizeof(VTContext),
 271 };
 272
 273 void ff_vda_output_callback(void *opaque,
 274                             CFDictionaryRef user_info,
 275                             OSStatus status,
 276                             uint32_t infoFlags,
 277                             CVImageBufferRef image_buffer)
 278 {
 279     AVCodecContext *ctx = opaque;
 280     VTContext *vda = ctx->internal->hwaccel_priv_data;
 281
 282
 283     if (vda->frame) {
 284         CVPixelBufferRelease(vda->frame);
 285         vda->frame = NULL;
 286     }
 287
 288     if (!image_buffer)
 289         return;
 290
 291     vda->frame = CVPixelBufferRetain(image_buffer);
 292 }
 293
 294 static int vda_h264_end_frame(AVCodecContext *avctx)
 295 {
 296     H264Context *h        = avctx->priv_data;
 297     VTContext *vda        = avctx->internal->hwaccel_priv_data;
 298     AVVDAContext *vda_ctx = avctx->hwaccel_context;
 299     AVFrame *frame        = h->cur_pic_ptr->f;
 300     uint32_t flush_flags  = 1 << 0; ///< kVDADecoderFlush_emitFrames
 301     CFDataRef coded_frame;
 302     OSStatus status;
 303
 304     if (!vda->bitstream_size)
 305         return AVERROR_INVALIDDATA;
 306
 307
 308     coded_frame = CFDataCreate(kCFAllocatorDefault,
 309                                vda->bitstream,
 310                                vda->bitstream_size);
 311
 312     status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, NULL);
 313
 314     if (status == kVDADecoderNoErr)
 315         status = VDADecoderFlush(vda_ctx->decoder, flush_flags);
 316
 317     CFRelease(coded_frame);
 318
 319     if (!vda->frame)
 320         return AVERROR_UNKNOWN;
 321
 322     if (status != kVDADecoderNoErr) {
 323         av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%d)\n", status);
 324         return AVERROR_UNKNOWN;
 325     }
 326
 327     return ff_videotoolbox_buffer_create(vda, frame);
 328 }
 329
 330 int ff_vda_default_init(AVCodecContext *avctx)
 331 {
 332     AVVDAContext *vda_ctx = avctx->hwaccel_context;
 333     OSStatus status = kVDADecoderNoErr;
 334     CFNumberRef height;
 335     CFNumberRef width;
 336     CFNumberRef format;
 337     CFDataRef avc_data;
 338     CFMutableDictionaryRef config_info;
 339     CFMutableDictionaryRef buffer_attributes;
 340     CFMutableDictionaryRef io_surface_properties;
 341     CFNumberRef cv_pix_fmt;
 342     int32_t fmt = 'avc1', pix_fmt = vda_ctx->cv_pix_fmt_type;
 343
 344     // kCVPixelFormatType_420YpCbCr8Planar;
 345
 346     avc_data = ff_videotoolbox_avcc_extradata_create(avctx);
 347
 348     config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
 349                                             4,
 350                                             &kCFTypeDictionaryKeyCallBacks,
 351                                             &kCFTypeDictionaryValueCallBacks);
 352
 353     height = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &avctx->height);
 354     width  = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &avctx->width);
 355     format = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &fmt);
 356     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Height, height);
 357     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Width, width);
 358     CFDictionarySetValue(config_info, kVDADecoderConfiguration_avcCData, avc_data);
 359     CFDictionarySetValue(config_info, kVDADecoderConfiguration_SourceFormat, format);
 360
 361     buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
 362                                                   2,
 363                                                   &kCFTypeDictionaryKeyCallBacks,
 364                                                   &kCFTypeDictionaryValueCallBacks);
 365     io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
 366                                                       0,
 367                                                       &kCFTypeDictionaryKeyCallBacks,
 368                                                       &kCFTypeDictionaryValueCallBacks);
 369     cv_pix_fmt      = CFNumberCreate(kCFAllocatorDefault,
 370                                      kCFNumberSInt32Type,
 371                                      &pix_fmt);
 372
 373     CFDictionarySetValue(buffer_attributes,
 374                          kCVPixelBufferPixelFormatTypeKey,
 375                          cv_pix_fmt);
 376     CFDictionarySetValue(buffer_attributes,
 377                          kCVPixelBufferIOSurfacePropertiesKey,
 378                          io_surface_properties);
 379
 380     status = VDADecoderCreate(config_info,
 381                               buffer_attributes,
 382                               (VDADecoderOutputCallback *)ff_vda_output_callback,
 383                               avctx,
 384                               &vda_ctx->decoder);
 385
 386     CFRelease(format);
 387     CFRelease(height);
 388     CFRelease(width);
 389     CFRelease(avc_data);
 390     CFRelease(config_info);
 391     CFRelease(cv_pix_fmt);
 392     CFRelease(io_surface_properties);
 393     CFRelease(buffer_attributes);
 394
 395     if (status != kVDADecoderNoErr) {
 396         av_log(avctx, AV_LOG_ERROR, "Cannot initialize VDA %d\n", status);
 397     }
 398
 399     switch (status) {
 400     case kVDADecoderHardwareNotSupportedErr:
 401     case kVDADecoderFormatNotSupportedErr:
 402         return AVERROR(ENOSYS);
 403     case kVDADecoderConfigurationError:
 404         return AVERROR(EINVAL);
 405     case kVDADecoderDecoderFailedErr:
 406         return AVERROR_INVALIDDATA;
 407     case kVDADecoderNoErr:
 408         return 0;
 409     default:
 410         return AVERROR_UNKNOWN;
 411     }
 412 }
 413
 414 AVHWAccel ff_h264_vda_hwaccel = {
 415     .name           = "h264_vda",
 416     .type           = AVMEDIA_TYPE_VIDEO,
 417     .id             = AV_CODEC_ID_H264,
 418     .pix_fmt        = AV_PIX_FMT_VDA,
 419     .alloc_frame    = ff_videotoolbox_alloc_frame,
 420     .start_frame    = ff_videotoolbox_h264_start_frame,
 421     .decode_slice   = ff_videotoolbox_h264_decode_slice,
 422     .end_frame      = vda_h264_end_frame,
 423     .uninit         = ff_videotoolbox_uninit,
 424     .priv_data_size = sizeof(VTContext),
 425 };