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