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 "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, kCFNumberSInt64Type, &i_pts);
  37     CFDictionaryRef user_info = CFDictionaryCreate(kCFAllocatorDefault,
  38                                                    (const void **)&key,
  39                                                    (const void **)&value,
  40                                                    1,
  41                                                    &kCFTypeDictionaryKeyCallBacks,
  42                                                    &kCFTypeDictionaryValueCallBacks);
  43     CFRelease(value);
  44     return user_info;
  45 }
  46
  47 /* Helper to retrieve the pts from the given dictionary. */
  48 static int64_t vda_pts_from_dictionary(CFDictionaryRef user_info)
  49 {
  50     CFNumberRef pts;
  51     int64_t outValue = 0;
  52
  53     if (!user_info)
  54         return 0;
  55
  56     pts = CFDictionaryGetValue(user_info, CFSTR("FF_VDA_DECODER_PTS_KEY"));
  57
  58     if (pts)
  59         CFNumberGetValue(pts, kCFNumberSInt64Type, &outValue);
  60
  61     return outValue;
  62 }
  63
  64 /* Removes and releases all frames from the queue. */
  65 static void vda_clear_queue(struct vda_context *vda_ctx)
  66 {
  67     vda_frame *top_frame;
  68
  69     pthread_mutex_lock(&vda_ctx->queue_mutex);
  70
  71     while (vda_ctx->queue) {
  72         top_frame = vda_ctx->queue;
  73         vda_ctx->queue = top_frame->next_frame;
  74         ff_vda_release_vda_frame(top_frame);
  75     }
  76
  77     pthread_mutex_unlock(&vda_ctx->queue_mutex);
  78 }
  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 = (struct vda_context*)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     new_frame = av_mallocz(sizeof(vda_frame));
  99     if (!new_frame)
 100         return;
 101
 102     new_frame->next_frame = NULL;
 103     new_frame->cv_buffer = CVPixelBufferRetain(image_buffer);
 104     new_frame->pts = vda_pts_from_dictionary(user_info);
 105
 106     pthread_mutex_lock(&vda_ctx->queue_mutex);
 107
 108     queue_walker = vda_ctx->queue;
 109
 110     if (!queue_walker || (new_frame->pts < queue_walker->pts)) {
 111         /* we have an empty queue, or this frame earlier than the current queue head */
 112         new_frame->next_frame = queue_walker;
 113         vda_ctx->queue = new_frame;
 114     } else {
 115         /* walk the queue and insert this frame where it belongs in display order */
 116         vda_frame *next_frame;
 117
 118         while (1) {
 119             next_frame = queue_walker->next_frame;
 120
 121             if (!next_frame || (new_frame->pts < next_frame->pts)) {
 122                 new_frame->next_frame = next_frame;
 123                 queue_walker->next_frame = new_frame;
 124                 break;
 125             }
 126             queue_walker = next_frame;
 127         }
 128     }
 129
 130     pthread_mutex_unlock(&vda_ctx->queue_mutex);
 131 }
 132
 133 int ff_vda_create_decoder(struct vda_context *vda_ctx,
 134                           uint8_t *extradata,
 135                           int extradata_size)
 136 {
 137     OSStatus status = kVDADecoderNoErr;
 138     CFNumberRef height;
 139     CFNumberRef width;
 140     CFNumberRef format;
 141     CFDataRef avc_data;
 142     CFMutableDictionaryRef config_info;
 143     CFMutableDictionaryRef buffer_attributes;
 144     CFMutableDictionaryRef io_surface_properties;
 145     CFNumberRef cv_pix_fmt;
 146
 147     vda_ctx->bitstream = NULL;
 148     vda_ctx->ref_size = 0;
 149
 150     pthread_mutex_init(&vda_ctx->queue_mutex, NULL);
 151
 152     /* Each VCL NAL in the bistream sent to the decoder
 153      * is preceded by a 4 bytes length header.
 154      * Change the avcC atom header if needed, to signal headers of 4 bytes. */
 155     if (extradata_size >= 4 && (extradata[4] & 0x03) != 0x03) {
 156         uint8_t *rw_extradata;
 157
 158         if (!(rw_extradata = av_malloc(extradata_size)))
 159             return AVERROR(ENOMEM);
 160
 161         memcpy(rw_extradata, extradata, extradata_size);
 162
 163         rw_extradata[4] |= 0x03;
 164
 165         avc_data = CFDataCreate(kCFAllocatorDefault, rw_extradata, extradata_size);
 166
 167         av_freep(&rw_extradata);
 168     } else {
 169         avc_data = CFDataCreate(kCFAllocatorDefault, extradata, extradata_size);
 170     }
 171
 172     config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
 173                                             4,
 174                                             &kCFTypeDictionaryKeyCallBacks,
 175                                             &kCFTypeDictionaryValueCallBacks);
 176
 177     height   = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->height);
 178     width    = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->width);
 179     format   = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->format);
 180
 181     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Height, height);
 182     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Width, width);
 183     CFDictionarySetValue(config_info, kVDADecoderConfiguration_SourceFormat, format);
 184     CFDictionarySetValue(config_info, kVDADecoderConfiguration_avcCData, avc_data);
 185
 186     buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
 187                                                   2,
 188                                                   &kCFTypeDictionaryKeyCallBacks,
 189                                                   &kCFTypeDictionaryValueCallBacks);
 190     io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
 191                                                       0,
 192                                                       &kCFTypeDictionaryKeyCallBacks,
 193                                                       &kCFTypeDictionaryValueCallBacks);
 194     cv_pix_fmt  = CFNumberCreate(kCFAllocatorDefault,
 195                                  kCFNumberSInt32Type,
 196                                  &vda_ctx->cv_pix_fmt_type);
 197     CFDictionarySetValue(buffer_attributes,
 198                          kCVPixelBufferPixelFormatTypeKey,
 199                          cv_pix_fmt);
 200     CFDictionarySetValue(buffer_attributes,
 201                          kCVPixelBufferIOSurfacePropertiesKey,
 202                          io_surface_properties);
 203
 204     status = VDADecoderCreate(config_info,
 205                               buffer_attributes,
 206                               (VDADecoderOutputCallback *)vda_decoder_callback,
 207                               vda_ctx,
 208                               &vda_ctx->decoder);
 209
 210     CFRelease(height);
 211     CFRelease(width);
 212     CFRelease(format);
 213     CFRelease(avc_data);
 214     CFRelease(config_info);
 215     CFRelease(io_surface_properties);
 216     CFRelease(cv_pix_fmt);
 217     CFRelease(buffer_attributes);
 218
 219     if (kVDADecoderNoErr != status)
 220         return status;
 221
 222     return 0;
 223 }
 224
 225 int ff_vda_destroy_decoder(struct vda_context *vda_ctx)
 226 {
 227     OSStatus status = kVDADecoderNoErr;
 228
 229     if (vda_ctx->decoder)
 230         status = VDADecoderDestroy(vda_ctx->decoder);
 231
 232     vda_clear_queue(vda_ctx);
 233
 234     pthread_mutex_destroy(&vda_ctx->queue_mutex);
 235
 236     if (vda_ctx->bitstream)
 237         av_freep(&vda_ctx->bitstream);
 238
 239     if (kVDADecoderNoErr != status)
 240         return status;
 241
 242     return 0;
 243 }
 244
 245 vda_frame *ff_vda_queue_pop(struct vda_context *vda_ctx)
 246 {
 247     vda_frame *top_frame;
 248
 249     if (!vda_ctx->queue)
 250         return NULL;
 251
 252     pthread_mutex_lock(&vda_ctx->queue_mutex);
 253     top_frame = vda_ctx->queue;
 254     vda_ctx->queue = top_frame->next_frame;
 255     pthread_mutex_unlock(&vda_ctx->queue_mutex);
 256
 257     return top_frame;
 258 }
 259
 260 void ff_vda_release_vda_frame(vda_frame *frame)
 261 {
 262     if (frame) {
 263         CVPixelBufferRelease(frame->cv_buffer);
 264         av_freep(&frame);
 265     }
 266 }
 267
 268 int ff_vda_decoder_decode(struct vda_context *vda_ctx,
 269                           uint8_t *bitstream,
 270                           int bitstream_size,
 271                           int64_t frame_pts)
 272 {
 273     OSStatus status = kVDADecoderNoErr;
 274     CFDictionaryRef user_info;
 275     CFDataRef coded_frame;
 276
 277     coded_frame = CFDataCreate(kCFAllocatorDefault, bitstream, bitstream_size);
 278     user_info = vda_dictionary_with_pts(frame_pts);
 279
 280     status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, user_info);
 281
 282     CFRelease(user_info);
 283     CFRelease(coded_frame);
 284
 285     if (kVDADecoderNoErr != status)
 286         return status;
 287
 288     return 0;
 289 }