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

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