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     /* Each VCL NAL in the bistream sent to the decoder
 146      * is preceeded by a 4 bytes length header.
 147      * Change the avcC atom header if needed, to signal headers of 4 bytes. */
 148     if (extradata_size >= 4 && (extradata[4] & 0x03) != 0x03) {
 149         uint8_t *rw_extradata;
 150
 151         if (!(rw_extradata = av_malloc(extradata_size)))
 152             return AVERROR(ENOMEM);
 153
 154         memcpy(rw_extradata, extradata, extradata_size);
 155
 156         rw_extradata[4] |= 0x03;
 157
 158         avc_data = CFDataCreate(kCFAllocatorDefault, rw_extradata, extradata_size);
 159
 160         av_freep(&rw_extradata);
 161     } else {
 162         avc_data = CFDataCreate(kCFAllocatorDefault, extradata, extradata_size);
 163     }
 164
 165     config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
 166                                             4,
 167                                             &kCFTypeDictionaryKeyCallBacks,
 168                                             &kCFTypeDictionaryValueCallBacks);
 169
 170     height   = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->height);
 171     width    = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->width);
 172     format   = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->format);
 173
 174     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Height, height);
 175     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Width, width);
 176     CFDictionarySetValue(config_info, kVDADecoderConfiguration_SourceFormat, format);
 177     CFDictionarySetValue(config_info, kVDADecoderConfiguration_avcCData, avc_data);
 178
 179     buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
 180                                                   2,
 181                                                   &kCFTypeDictionaryKeyCallBacks,
 182                                                   &kCFTypeDictionaryValueCallBacks);
 183     io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
 184                                                       0,
 185                                                       &kCFTypeDictionaryKeyCallBacks,
 186                                                       &kCFTypeDictionaryValueCallBacks);
 187     cv_pix_fmt      = CFNumberCreate(kCFAllocatorDefault,
 188                                      kCFNumberSInt32Type,
 189                                      &vda_ctx->cv_pix_fmt_type);
 190     CFDictionarySetValue(buffer_attributes,
 191                          kCVPixelBufferPixelFormatTypeKey,
 192                          cv_pix_fmt);
 193     CFDictionarySetValue(buffer_attributes,
 194                          kCVPixelBufferIOSurfacePropertiesKey,
 195                          io_surface_properties);
 196
 197     status = VDADecoderCreate(config_info,
 198                               buffer_attributes,
 199                               vda_decoder_callback,
 200                               vda_ctx,
 201                               &vda_ctx->decoder);
 202
 203     CFRelease(height);
 204     CFRelease(width);
 205     CFRelease(format);
 206     CFRelease(avc_data);
 207     CFRelease(config_info);
 208     CFRelease(io_surface_properties);
 209     CFRelease(cv_pix_fmt);
 210     CFRelease(buffer_attributes);
 211
 212     if (kVDADecoderNoErr != status)
 213         return status;
 214
 215     return 0;
 216 }
 217
 218 int ff_vda_destroy_decoder(struct vda_context *vda_ctx)
 219 {
 220     OSStatus status = kVDADecoderNoErr;
 221
 222     if (vda_ctx->decoder)
 223         status = VDADecoderDestroy(vda_ctx->decoder);
 224
 225     vda_clear_queue(vda_ctx);
 226
 227     pthread_mutex_destroy(&vda_ctx->queue_mutex);
 228
 229     if (kVDADecoderNoErr != status)
 230         return status;
 231
 232     return 0;
 233 }
 234
 235 vda_frame *ff_vda_queue_pop(struct vda_context *vda_ctx)
 236 {
 237     vda_frame *top_frame;
 238
 239     if (!vda_ctx->queue)
 240         return NULL;
 241
 242     pthread_mutex_lock(&vda_ctx->queue_mutex);
 243     top_frame      = vda_ctx->queue;
 244     vda_ctx->queue = top_frame->next_frame;
 245     pthread_mutex_unlock(&vda_ctx->queue_mutex);
 246
 247     return top_frame;
 248 }
 249
 250 void ff_vda_release_vda_frame(vda_frame *frame)
 251 {
 252     if (frame) {
 253         CVPixelBufferRelease(frame->cv_buffer);
 254         av_freep(&frame);
 255     }
 256 }
 257
 258 int ff_vda_decoder_decode(struct vda_context *vda_ctx,
 259                           uint8_t *bitstream,
 260                           int bitstream_size,
 261                           int64_t frame_pts)
 262 {
 263     OSStatus status = kVDADecoderNoErr;
 264     CFDictionaryRef user_info;
 265     CFDataRef coded_frame;
 266
 267     coded_frame = CFDataCreate(kCFAllocatorDefault, bitstream, bitstream_size);
 268     user_info   = vda_dictionary_with_pts(frame_pts);
 269     status      = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, user_info);
 270
 271     CFRelease(user_info);
 272     CFRelease(coded_frame);
 273
 274     if (kVDADecoderNoErr != status)
 275         return status;
 276
 277     return 0;
 278 }