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 <CoreFoundation/CFNumber.h>
  24 #include <CoreFoundation/CFData.h>
  25 #include <CoreFoundation/CFString.h>
  26
  27 #include "libavutil/avutil.h"
  28 #include "vda_internal.h"
  29
  30 #if FF_API_VDA_ASYNC
  31 #include <CoreFoundation/CFDictionary.h>
  32
  33 /* helper to create a dictionary according to the given pts */
  34 static CFDictionaryRef vda_dictionary_with_pts(int64_t i_pts)
  35 {
  36     CFStringRef key           = CFSTR("FF_VDA_DECODER_PTS_KEY");
  37     CFNumberRef value         = CFNumberCreate(kCFAllocatorDefault,
  38                                                kCFNumberSInt64Type, &i_pts);
  39     CFDictionaryRef user_info = CFDictionaryCreate(kCFAllocatorDefault,
  40                                                    (const void **)&key,
  41                                                    (const void **)&value,
  42                                                    1,
  43                                                    &kCFTypeDictionaryKeyCallBacks,
  44                                                    &kCFTypeDictionaryValueCallBacks);
  45     CFRelease(value);
  46     return user_info;
  47 }
  48
  49 /* helper to retrieve the pts from the given dictionary */
  50 static int64_t vda_pts_from_dictionary(CFDictionaryRef user_info)
  51 {
  52     CFNumberRef pts;
  53     int64_t outValue = 0;
  54
  55     if (!user_info)
  56         return 0;
  57
  58     pts = CFDictionaryGetValue(user_info, CFSTR("FF_VDA_DECODER_PTS_KEY"));
  59
  60     if (pts)
  61         CFNumberGetValue(pts, kCFNumberSInt64Type, &outValue);
  62
  63     return outValue;
  64 }
  65
  66 /* Remove and release all frames from the queue. */
  67 static void vda_clear_queue(struct vda_context *vda_ctx)
  68 {
  69     vda_frame *top_frame;
  70
  71     pthread_mutex_lock(&vda_ctx->queue_mutex);
  72
  73     while (vda_ctx->queue) {
  74         top_frame      = vda_ctx->queue;
  75         vda_ctx->queue = top_frame->next_frame;
  76         ff_vda_release_vda_frame(top_frame);
  77     }
  78
  79     pthread_mutex_unlock(&vda_ctx->queue_mutex);
  80 }
  81 #endif
  82
  83 /* Decoder callback that adds the VDA frame to the queue in display order. */
  84 static void vda_decoder_callback(void *vda_hw_ctx,
  85                                  CFDictionaryRef user_info,
  86                                  OSStatus status,
  87                                  uint32_t infoFlags,
  88                                  CVImageBufferRef image_buffer)
  89 {
  90     struct vda_context *vda_ctx = vda_hw_ctx;
  91
  92     if (!image_buffer)
  93         return;
  94
  95     if (vda_ctx->cv_pix_fmt_type != CVPixelBufferGetPixelFormatType(image_buffer))
  96         return;
  97
  98     if (vda_ctx->use_sync_decoding) {
  99         vda_ctx->cv_buffer = CVPixelBufferRetain(image_buffer);
 100     } else {
 101         vda_frame *new_frame;
 102         vda_frame *queue_walker;
 103
 104         if (!(new_frame = av_mallocz(sizeof(vda_frame))))
 105             return;
 106         new_frame->next_frame = NULL;
 107         new_frame->cv_buffer  = CVPixelBufferRetain(image_buffer);
 108         new_frame->pts        = vda_pts_from_dictionary(user_info);
 109
 110         pthread_mutex_lock(&vda_ctx->queue_mutex);
 111
 112         queue_walker = vda_ctx->queue;
 113
 114         if (!queue_walker || new_frame->pts < queue_walker->pts) {
 115             /* we have an empty queue, or this frame earlier than the current queue head */
 116             new_frame->next_frame = queue_walker;
 117             vda_ctx->queue        = new_frame;
 118         } else {
 119             /* walk the queue and insert this frame where it belongs in display order */
 120             vda_frame *next_frame;
 121             while (1) {
 122                 next_frame = queue_walker->next_frame;
 123                 if (!next_frame || new_frame->pts < next_frame->pts) {
 124                     new_frame->next_frame    = next_frame;
 125                     queue_walker->next_frame = new_frame;
 126                     break;
 127                 }
 128                 queue_walker = next_frame;
 129             }
 130         }
 131
 132         pthread_mutex_unlock(&vda_ctx->queue_mutex);
 133     }
 134 }
 135
 136 int ff_vda_create_decoder(struct vda_context *vda_ctx,
 137                           uint8_t *extradata,
 138                           int extradata_size)
 139 {
 140     OSStatus status = kVDADecoderNoErr;
 141     CFNumberRef height;
 142     CFNumberRef width;
 143     CFNumberRef format;
 144     CFDataRef avc_data;
 145     CFMutableDictionaryRef config_info;
 146     CFMutableDictionaryRef buffer_attributes;
 147     CFMutableDictionaryRef io_surface_properties;
 148     CFNumberRef cv_pix_fmt;
 149
 150 #if FF_API_VDA_ASYNC
 151     pthread_mutex_init(&vda_ctx->queue_mutex, NULL);
 152 #endif
 153
 154     /* Each VCL NAL in the bistream sent to the decoder
 155      * is preceeded by a 4 bytes length header.
 156      * Change the avcC atom header if needed, to signal headers of 4 bytes. */
 157     if (extradata_size >= 4 && (extradata[4] & 0x03) != 0x03) {
 158         uint8_t *rw_extradata;
 159
 160         if (!(rw_extradata = av_malloc(extradata_size)))
 161             return AVERROR(ENOMEM);
 162
 163         memcpy(rw_extradata, extradata, extradata_size);
 164
 165         rw_extradata[4] |= 0x03;
 166
 167         avc_data = CFDataCreate(kCFAllocatorDefault, rw_extradata, extradata_size);
 168
 169         av_freep(&rw_extradata);
 170     } else {
 171         avc_data = CFDataCreate(kCFAllocatorDefault, extradata, extradata_size);
 172     }
 173
 174     config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
 175                                             4,
 176                                             &kCFTypeDictionaryKeyCallBacks,
 177                                             &kCFTypeDictionaryValueCallBacks);
 178
 179     height   = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->height);
 180     width    = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->width);
 181     format   = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->format);
 182
 183     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Height, height);
 184     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Width, width);
 185     CFDictionarySetValue(config_info, kVDADecoderConfiguration_SourceFormat, format);
 186     CFDictionarySetValue(config_info, kVDADecoderConfiguration_avcCData, avc_data);
 187
 188     buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
 189                                                   2,
 190                                                   &kCFTypeDictionaryKeyCallBacks,
 191                                                   &kCFTypeDictionaryValueCallBacks);
 192     io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
 193                                                       0,
 194                                                       &kCFTypeDictionaryKeyCallBacks,
 195                                                       &kCFTypeDictionaryValueCallBacks);
 196     cv_pix_fmt      = CFNumberCreate(kCFAllocatorDefault,
 197                                      kCFNumberSInt32Type,
 198                                      &vda_ctx->cv_pix_fmt_type);
 199     CFDictionarySetValue(buffer_attributes,
 200                          kCVPixelBufferPixelFormatTypeKey,
 201                          cv_pix_fmt);
 202     CFDictionarySetValue(buffer_attributes,
 203                          kCVPixelBufferIOSurfacePropertiesKey,
 204                          io_surface_properties);
 205
 206     status = VDADecoderCreate(config_info,
 207                               buffer_attributes,
 208                               vda_decoder_callback,
 209                               vda_ctx,
 210                               &vda_ctx->decoder);
 211
 212     CFRelease(height);
 213     CFRelease(width);
 214     CFRelease(format);
 215     CFRelease(avc_data);
 216     CFRelease(config_info);
 217     CFRelease(io_surface_properties);
 218     CFRelease(cv_pix_fmt);
 219     CFRelease(buffer_attributes);
 220
 221     return status;
 222 }
 223
 224 int ff_vda_destroy_decoder(struct vda_context *vda_ctx)
 225 {
 226     OSStatus status = kVDADecoderNoErr;
 227
 228     if (vda_ctx->decoder)
 229         status = VDADecoderDestroy(vda_ctx->decoder);
 230
 231 #if FF_API_VDA_ASYNC
 232     vda_clear_queue(vda_ctx);
 233     pthread_mutex_destroy(&vda_ctx->queue_mutex);
 234 #endif
 235
 236     av_freep(&vda_ctx->priv_bitstream);
 237
 238     return status;
 239 }
 240
 241 #if FF_API_VDA_ASYNC
 242 vda_frame *ff_vda_queue_pop(struct vda_context *vda_ctx)
 243 {
 244     vda_frame *top_frame;
 245
 246     if (!vda_ctx->queue)
 247         return NULL;
 248
 249     pthread_mutex_lock(&vda_ctx->queue_mutex);
 250     top_frame      = vda_ctx->queue;
 251     vda_ctx->queue = top_frame->next_frame;
 252     pthread_mutex_unlock(&vda_ctx->queue_mutex);
 253
 254     return top_frame;
 255 }
 256
 257 void ff_vda_release_vda_frame(vda_frame *frame)
 258 {
 259     if (frame) {
 260         CVPixelBufferRelease(frame->cv_buffer);
 261         av_freep(&frame);
 262     }
 263 }
 264
 265 int ff_vda_decoder_decode(struct vda_context *vda_ctx,
 266                           uint8_t *bitstream,
 267                           int bitstream_size,
 268                           int64_t frame_pts)
 269 {
 270     OSStatus status = kVDADecoderNoErr;
 271     CFDictionaryRef user_info;
 272     CFDataRef coded_frame;
 273
 274     coded_frame = CFDataCreate(kCFAllocatorDefault, bitstream, bitstream_size);
 275     user_info   = vda_dictionary_with_pts(frame_pts);
 276     status      = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, user_info);
 277
 278     CFRelease(user_info);
 279     CFRelease(coded_frame);
 280
 281     return status;
 282 }
 283 #endif
 284
 285 int ff_vda_sync_decode(struct vda_context *vda_ctx)
 286 {
 287     OSStatus status;
 288     CFDataRef coded_frame;
 289     uint32_t flush_flags = 1 << 0; ///< kVDADecoderFlush_emitFrames
 290
 291     coded_frame = CFDataCreate(kCFAllocatorDefault,
 292                                vda_ctx->priv_bitstream,
 293                                vda_ctx->priv_bitstream_size);
 294
 295     status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, NULL);
 296
 297     if (kVDADecoderNoErr == status)
 298         status = VDADecoderFlush(vda_ctx->decoder, flush_flags);
 299
 300     CFRelease(coded_frame);
 301
 302     return status;
 303 }