hwaccel: OS X Video Decoder Acceleration (VDA) support.
[libav.git] / 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 }