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     {
  43         case AV_LOCK_CREATE:
  44             *mtx = av_malloc(sizeof(pthread_mutex_t));
  45             if(!*mtx)
  46                 return 1;
  47             return !!pthread_mutex_init(*mtx, NULL);
  48         case AV_LOCK_OBTAIN:
  49             return !!pthread_mutex_lock(*mtx);
  50         case AV_LOCK_RELEASE:
  51             return !!pthread_mutex_unlock(*mtx);
  52         case AV_LOCK_DESTROY:
  53             pthread_mutex_destroy(*mtx);
  54             av_freep(mtx);
  55             return 0;
  56     }
  57     return 1;
  58 }
  59
  60 /* Helper to create a dictionary according to the given pts. */
  61 static CFDictionaryRef vda_dictionary_with_pts(int64_t i_pts)
  62 {
  63     CFStringRef key = CFSTR("FF_VDA_DECODER_PTS_KEY");
  64     CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt64Type, &i_pts);
  65     CFDictionaryRef user_info = CFDictionaryCreate( kCFAllocatorDefault,
  66                                                     (const void **)&key,
  67                                                     (const void **)&value,
  68                                                     1,
  69                                                     &kCFTypeDictionaryKeyCallBacks,
  70                                                     &kCFTypeDictionaryValueCallBacks);
  71     CFRelease(value);
  72     return user_info;
  73 }
  74
  75 /* Helper to retrieve the pts from the given dictionary. */
  76 static int64_t vda_pts_from_dictionary(CFDictionaryRef user_info)
  77 {
  78     CFNumberRef pts;
  79     int64_t outValue = 0;
  80
  81     if (!user_info)
  82         return 0;
  83
  84     pts = CFDictionaryGetValue(user_info, CFSTR("FF_VDA_DECODER_PTS_KEY"));
  85
  86     if (pts)
  87         CFNumberGetValue(pts, kCFNumberSInt64Type, &outValue);
  88
  89     return outValue;
  90 }
  91
  92 /* Removes and releases all frames from the queue. */
  93 static void vda_clear_queue(struct vda_context *vda_ctx)
  94 {
  95     vda_frame *top_frame;
  96
  97     vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_OBTAIN);
  98
  99     while (vda_ctx->queue)
 100     {
 101         top_frame = vda_ctx->queue;
 102         vda_ctx->queue = top_frame->next_frame;
 103         ff_vda_release_vda_frame(top_frame);
 104     }
 105
 106     vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_RELEASE);
 107 }
 108
 109
 110 /* Decoder callback that adds the vda frame to the queue in display order. */
 111 static void vda_decoder_callback (void *vda_hw_ctx,
 112                                   CFDictionaryRef user_info,
 113                                   OSStatus status,
 114                                   uint32_t infoFlags,
 115                                   CVImageBufferRef image_buffer)
 116 {
 117     struct vda_context *vda_ctx = (struct vda_context*)vda_hw_ctx;
 118     vda_frame *new_frame;
 119     vda_frame *queue_walker;
 120
 121     if (!image_buffer)
 122         return;
 123
 124     if (vda_ctx->cv_pix_fmt_type != CVPixelBufferGetPixelFormatType(image_buffer))
 125         return;
 126
 127     new_frame = av_mallocz(sizeof(vda_frame));
 128     if (!new_frame)
 129         return;
 130
 131     new_frame->next_frame = NULL;
 132     new_frame->cv_buffer = CVPixelBufferRetain(image_buffer);
 133     new_frame->pts = vda_pts_from_dictionary(user_info);
 134
 135     vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_OBTAIN);
 136
 137     queue_walker = vda_ctx->queue;
 138
 139     if (!queue_walker || (new_frame->pts < queue_walker->pts))
 140     {
 141         /* we have an empty queue, or this frame earlier than the current queue head */
 142         new_frame->next_frame = queue_walker;
 143         vda_ctx->queue = new_frame;
 144     }
 145     else
 146     {
 147         /* walk the queue and insert this frame where it belongs in display order */
 148         vda_frame *next_frame;
 149
 150         while (1)
 151         {
 152             next_frame = queue_walker->next_frame;
 153
 154             if (!next_frame || (new_frame->pts < next_frame->pts))
 155             {
 156                 new_frame->next_frame = next_frame;
 157                 queue_walker->next_frame = new_frame;
 158                 break;
 159             }
 160             queue_walker = next_frame;
 161         }
 162     }
 163
 164     vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_RELEASE);
 165 }
 166
 167 int ff_vda_create_decoder(struct vda_context *vda_ctx,
 168                           uint8_t *extradata,
 169                           int extradata_size)
 170 {
 171     OSStatus status = kVDADecoderNoErr;
 172     CFNumberRef height;
 173     CFNumberRef width;
 174     CFNumberRef format;
 175     CFDataRef avc_data;
 176     CFMutableDictionaryRef config_info;
 177     CFMutableDictionaryRef buffer_attributes;
 178     CFMutableDictionaryRef io_surface_properties;
 179     CFNumberRef cv_pix_fmt;
 180
 181     vda_ctx->bitstream = NULL;
 182     vda_ctx->ref_size = 0;
 183
 184     if (av_lockmgr_register(vda_lock_operation))
 185         return -1;
 186
 187     vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_CREATE);
 188
 189     config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
 190                                             4,
 191                                             &kCFTypeDictionaryKeyCallBacks,
 192                                             &kCFTypeDictionaryValueCallBacks);
 193
 194     height = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->height);
 195     width = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->width);
 196     format = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->format);
 197     avc_data = CFDataCreate(kCFAllocatorDefault, extradata, extradata_size);
 198
 199     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Height, height);
 200     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Width, width);
 201     CFDictionarySetValue(config_info, kVDADecoderConfiguration_SourceFormat, format);
 202     CFDictionarySetValue(config_info, kVDADecoderConfiguration_avcCData, avc_data);
 203
 204     buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
 205                                                   2,
 206                                                   &kCFTypeDictionaryKeyCallBacks,
 207                                                   &kCFTypeDictionaryValueCallBacks);
 208     io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
 209                                                       0,
 210                                                       &kCFTypeDictionaryKeyCallBacks,
 211                                                       &kCFTypeDictionaryValueCallBacks);
 212     cv_pix_fmt  = CFNumberCreate(kCFAllocatorDefault,
 213                                  kCFNumberSInt32Type,
 214                                  &vda_ctx->cv_pix_fmt_type);
 215     CFDictionarySetValue(buffer_attributes,
 216                          kCVPixelBufferPixelFormatTypeKey,
 217                          cv_pix_fmt);
 218     CFDictionarySetValue(buffer_attributes,
 219                          kCVPixelBufferIOSurfacePropertiesKey,
 220                          io_surface_properties);
 221
 222     status = VDADecoderCreate( config_info,
 223                                buffer_attributes,
 224                                (VDADecoderOutputCallback *)vda_decoder_callback,
 225                                vda_ctx,
 226                                &vda_ctx->decoder );
 227
 228     CFRelease(height);
 229     CFRelease(width);
 230     CFRelease(format);
 231     CFRelease(avc_data);
 232     CFRelease(config_info);
 233     CFRelease(io_surface_properties);
 234     CFRelease(cv_pix_fmt);
 235     CFRelease(buffer_attributes);
 236
 237     if (kVDADecoderNoErr != status)
 238         return status;
 239
 240     return 0;
 241 }
 242
 243 int ff_vda_destroy_decoder(struct vda_context *vda_ctx)
 244 {
 245     OSStatus status = kVDADecoderNoErr;
 246
 247     if (vda_ctx->decoder)
 248         status = VDADecoderDestroy(vda_ctx->decoder);
 249
 250     vda_clear_queue(vda_ctx);
 251
 252     if (vda_ctx->queue_mutex)
 253         vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_DESTROY);
 254
 255     if (vda_ctx->bitstream)
 256         av_freep(&vda_ctx->bitstream);
 257
 258     if (kVDADecoderNoErr != status)
 259         return status;
 260
 261     return 0;
 262 }
 263
 264 vda_frame *ff_vda_queue_pop(struct vda_context *vda_ctx)
 265 {
 266     vda_frame *top_frame;
 267
 268     if (!vda_ctx->queue)
 269         return NULL;
 270
 271     vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_OBTAIN);
 272     top_frame = vda_ctx->queue;
 273     vda_ctx->queue = top_frame->next_frame;
 274     vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_RELEASE);
 275
 276     return top_frame;
 277 }
 278
 279 void ff_vda_release_vda_frame(vda_frame *frame)
 280 {
 281     if (frame)
 282     {
 283         CVPixelBufferRelease(frame->cv_buffer);
 284         av_freep(&frame);
 285     }
 286 }
 287
 288 int ff_vda_decoder_decode(struct vda_context *vda_ctx,
 289                           uint8_t *bitstream,
 290                           int bitstream_size,
 291                           int64_t frame_pts)
 292 {
 293     OSStatus status = kVDADecoderNoErr;
 294     CFDictionaryRef user_info;
 295     CFDataRef coded_frame;
 296
 297     coded_frame = CFDataCreate(kCFAllocatorDefault, bitstream, bitstream_size);
 298     user_info = vda_dictionary_with_pts(frame_pts);
 299
 300     status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, user_info);
 301
 302     CFRelease(user_info);
 303     CFRelease(coded_frame);
 304
 305     if (kVDADecoderNoErr != status)
 306         return status;
 307
 308     return 0;
 309 }
 310
 311 /* @} */