git.sesse.net Git - ffmpeg/blob - libavcodec/vda.c

   1 /*
   2  * VDA 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 <pthread.h>
  24 #include <CoreFoundation/CFDictionary.h>
  25 #include <CoreFoundation/CFNumber.h>
  26 #include <CoreFoundation/CFData.h>
  27 #include <CoreFoundation/CFString.h>
  28
  29 #include "avcodec.h"
  30 #include "vda_internal.h"
  31
  32 /**
  33  * \addtogroup VDA_Decoding
  34  *
  35  * @{
  36  */
  37
  38 /* Mutex manager callback. */
  39 static int vda_lock_operation(void **mtx, enum AVLockOp op)
  40 {
  41     switch (op) {
  42     case AV_LOCK_CREATE:
  43         *mtx = av_malloc(sizeof(pthread_mutex_t));
  44         if (!*mtx)
  45             return 1;
  46         return !!pthread_mutex_init(*mtx, NULL);
  47     case AV_LOCK_OBTAIN:
  48         return !!pthread_mutex_lock(*mtx);
  49     case AV_LOCK_RELEASE:
  50         return !!pthread_mutex_unlock(*mtx);
  51     case AV_LOCK_DESTROY:
  52         pthread_mutex_destroy(*mtx);
  53         av_freep(mtx);
  54         return 0;
  55     }
  56     return 1;
  57 }
  58
  59 /* Helper to create a dictionary according to the given pts. */
  60 static CFDictionaryRef vda_dictionary_with_pts(int64_t i_pts)
  61 {
  62     CFStringRef key = CFSTR("FF_VDA_DECODER_PTS_KEY");
  63     CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt64Type, &i_pts);
  64     CFDictionaryRef user_info = CFDictionaryCreate(kCFAllocatorDefault,
  65                                                    (const void **)&key,
  66                                                    (const void **)&value,
  67                                                    1,
  68                                                    &kCFTypeDictionaryKeyCallBacks,
  69                                                    &kCFTypeDictionaryValueCallBacks);
  70     CFRelease(value);
  71     return user_info;
  72 }
  73
  74 /* Helper to retrieve the pts from the given dictionary. */
  75 static int64_t vda_pts_from_dictionary(CFDictionaryRef user_info)
  76 {
  77     CFNumberRef pts;
  78     int64_t outValue = 0;
  79
  80     if (!user_info)
  81         return 0;
  82
  83     pts = CFDictionaryGetValue(user_info, CFSTR("FF_VDA_DECODER_PTS_KEY"));
  84
  85     if (pts)
  86         CFNumberGetValue(pts, kCFNumberSInt64Type, &outValue);
  87
  88     return outValue;
  89 }
  90
  91 /* Removes and releases all frames from the queue. */
  92 static void vda_clear_queue(struct vda_context *vda_ctx)
  93 {
  94     vda_frame *top_frame;
  95
  96     vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_OBTAIN);
  97
  98     while (vda_ctx->queue) {
  99         top_frame = vda_ctx->queue;
 100         vda_ctx->queue = top_frame->next_frame;
 101         ff_vda_release_vda_frame(top_frame);
 102     }
 103
 104     vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_RELEASE);
 105 }
 106
 107
 108 /* Decoder callback that adds the vda frame to the queue in display order. */
 109 static void vda_decoder_callback (void *vda_hw_ctx,
 110                                   CFDictionaryRef user_info,
 111                                   OSStatus status,
 112                                   uint32_t infoFlags,
 113                                   CVImageBufferRef image_buffer)
 114 {
 115     struct vda_context *vda_ctx = (struct vda_context*)vda_hw_ctx;
 116     vda_frame *new_frame;
 117     vda_frame *queue_walker;
 118
 119     if (!image_buffer)
 120         return;
 121
 122     if (vda_ctx->cv_pix_fmt_type != CVPixelBufferGetPixelFormatType(image_buffer))
 123         return;
 124
 125     new_frame = av_mallocz(sizeof(vda_frame));
 126     if (!new_frame)
 127         return;
 128
 129     new_frame->next_frame = NULL;
 130     new_frame->cv_buffer = CVPixelBufferRetain(image_buffer);
 131     new_frame->pts = vda_pts_from_dictionary(user_info);
 132
 133     vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_OBTAIN);
 134
 135     queue_walker = vda_ctx->queue;
 136
 137     if (!queue_walker || (new_frame->pts < queue_walker->pts)) {
 138         /* we have an empty queue, or this frame earlier than the current queue head */
 139         new_frame->next_frame = queue_walker;
 140         vda_ctx->queue = new_frame;
 141     } else {
 142         /* walk the queue and insert this frame where it belongs in display order */
 143         vda_frame *next_frame;
 144
 145         while (1) {
 146             next_frame = queue_walker->next_frame;
 147
 148             if (!next_frame || (new_frame->pts < next_frame->pts)) {
 149                 new_frame->next_frame = next_frame;
 150                 queue_walker->next_frame = new_frame;
 151                 break;
 152             }
 153             queue_walker = next_frame;
 154         }
 155     }
 156
 157     vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_RELEASE);
 158 }
 159
 160 int ff_vda_create_decoder(struct vda_context *vda_ctx,
 161                           uint8_t *extradata,
 162                           int extradata_size)
 163 {
 164     OSStatus status = kVDADecoderNoErr;
 165     CFNumberRef height;
 166     CFNumberRef width;
 167     CFNumberRef format;
 168     CFDataRef avc_data;
 169     CFMutableDictionaryRef config_info;
 170     CFMutableDictionaryRef buffer_attributes;
 171     CFMutableDictionaryRef io_surface_properties;
 172     CFNumberRef cv_pix_fmt;
 173
 174     vda_ctx->bitstream = NULL;
 175     vda_ctx->ref_size = 0;
 176
 177     if (av_lockmgr_register(vda_lock_operation))
 178         return -1;
 179
 180     vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_CREATE);
 181
 182     config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
 183                                             4,
 184                                             &kCFTypeDictionaryKeyCallBacks,
 185                                             &kCFTypeDictionaryValueCallBacks);
 186
 187     height = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->height);
 188     width = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->width);
 189     format = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->format);
 190     avc_data = CFDataCreate(kCFAllocatorDefault, extradata, extradata_size);
 191
 192     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Height, height);
 193     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Width, width);
 194     CFDictionarySetValue(config_info, kVDADecoderConfiguration_SourceFormat, format);
 195     CFDictionarySetValue(config_info, kVDADecoderConfiguration_avcCData, avc_data);
 196
 197     buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
 198                                                   2,
 199                                                   &kCFTypeDictionaryKeyCallBacks,
 200                                                   &kCFTypeDictionaryValueCallBacks);
 201     io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
 202                                                       0,
 203                                                       &kCFTypeDictionaryKeyCallBacks,
 204                                                       &kCFTypeDictionaryValueCallBacks);
 205     cv_pix_fmt  = CFNumberCreate(kCFAllocatorDefault,
 206                                  kCFNumberSInt32Type,
 207                                  &vda_ctx->cv_pix_fmt_type);
 208     CFDictionarySetValue(buffer_attributes,
 209                          kCVPixelBufferPixelFormatTypeKey,
 210                          cv_pix_fmt);
 211     CFDictionarySetValue(buffer_attributes,
 212                          kCVPixelBufferIOSurfacePropertiesKey,
 213                          io_surface_properties);
 214
 215     status = VDADecoderCreate(config_info,
 216                               buffer_attributes,
 217                               (VDADecoderOutputCallback *)vda_decoder_callback,
 218                               vda_ctx,
 219                               &vda_ctx->decoder);
 220
 221     CFRelease(height);
 222     CFRelease(width);
 223     CFRelease(format);
 224     CFRelease(avc_data);
 225     CFRelease(config_info);
 226     CFRelease(io_surface_properties);
 227     CFRelease(cv_pix_fmt);
 228     CFRelease(buffer_attributes);
 229
 230     if (kVDADecoderNoErr != status)
 231         return status;
 232
 233     return 0;
 234 }
 235
 236 int ff_vda_destroy_decoder(struct vda_context *vda_ctx)
 237 {
 238     OSStatus status = kVDADecoderNoErr;
 239
 240     if (vda_ctx->decoder)
 241         status = VDADecoderDestroy(vda_ctx->decoder);
 242
 243     vda_clear_queue(vda_ctx);
 244
 245     if (vda_ctx->queue_mutex)
 246         vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_DESTROY);
 247
 248     if (vda_ctx->bitstream)
 249         av_freep(&vda_ctx->bitstream);
 250
 251     if (kVDADecoderNoErr != status)
 252         return status;
 253
 254     return 0;
 255 }
 256
 257 vda_frame *ff_vda_queue_pop(struct vda_context *vda_ctx)
 258 {
 259     vda_frame *top_frame;
 260
 261     if (!vda_ctx->queue)
 262         return NULL;
 263
 264     vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_OBTAIN);
 265     top_frame = vda_ctx->queue;
 266     vda_ctx->queue = top_frame->next_frame;
 267     vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_RELEASE);
 268
 269     return top_frame;
 270 }
 271
 272 void ff_vda_release_vda_frame(vda_frame *frame)
 273 {
 274     if (frame) {
 275         CVPixelBufferRelease(frame->cv_buffer);
 276         av_freep(&frame);
 277     }
 278 }
 279
 280 int ff_vda_decoder_decode(struct vda_context *vda_ctx,
 281                           uint8_t *bitstream,
 282                           int bitstream_size,
 283                           int64_t frame_pts)
 284 {
 285     OSStatus status = kVDADecoderNoErr;
 286     CFDictionaryRef user_info;
 287     CFDataRef coded_frame;
 288
 289     coded_frame = CFDataCreate(kCFAllocatorDefault, bitstream, bitstream_size);
 290     user_info = vda_dictionary_with_pts(frame_pts);
 291
 292     status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, user_info);
 293
 294     CFRelease(user_info);
 295     CFRelease(coded_frame);
 296
 297     if (kVDADecoderNoErr != status)
 298         return status;
 299
 300     return 0;
 301 }
 302
 303 /* @} */