vp9: decode_mode context optimizations.
[ffmpeg.git] / libavcodec / vda_h264.c
1 /*
2  * VDA H264 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 <CoreFoundation/CFDictionary.h>
24 #include <CoreFoundation/CFNumber.h>
25 #include <CoreFoundation/CFData.h>
26
27 #include "vda.h"
28 #include "libavutil/avutil.h"
29 #include "h264.h"
30
31 struct vda_buffer {
32     CVPixelBufferRef cv_buffer;
33 };
34
35 /* Decoder callback that adds the vda frame to the queue in display order. */
36 static void vda_decoder_callback(void *vda_hw_ctx,
37                                  CFDictionaryRef user_info,
38                                  OSStatus status,
39                                  uint32_t infoFlags,
40                                  CVImageBufferRef image_buffer)
41 {
42     struct vda_context *vda_ctx = vda_hw_ctx;
43
44     if (infoFlags & kVDADecodeInfo_FrameDropped)
45         vda_ctx->cv_buffer = NULL;
46
47     if (!image_buffer)
48         return;
49
50     if (vda_ctx->cv_pix_fmt_type != CVPixelBufferGetPixelFormatType(image_buffer))
51         return;
52
53     vda_ctx->cv_buffer = CVPixelBufferRetain(image_buffer);
54 }
55
56 static int vda_sync_decode(struct vda_context *vda_ctx)
57 {
58     OSStatus status;
59     CFDataRef coded_frame;
60     uint32_t flush_flags = 1 << 0; ///< kVDADecoderFlush_emitFrames
61
62     coded_frame = CFDataCreate(kCFAllocatorDefault,
63                                vda_ctx->priv_bitstream,
64                                vda_ctx->priv_bitstream_size);
65
66     status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, NULL);
67
68     if (kVDADecoderNoErr == status)
69         status = VDADecoderFlush(vda_ctx->decoder, flush_flags);
70
71     CFRelease(coded_frame);
72
73     return status;
74 }
75
76
77 static int vda_h264_start_frame(AVCodecContext *avctx,
78                                 av_unused const uint8_t *buffer,
79                                 av_unused uint32_t size)
80 {
81     struct vda_context *vda_ctx = avctx->hwaccel_context;
82
83     if (!vda_ctx->decoder)
84         return -1;
85
86     vda_ctx->priv_bitstream_size = 0;
87
88     return 0;
89 }
90
91 static int vda_h264_decode_slice(AVCodecContext *avctx,
92                                  const uint8_t *buffer,
93                                  uint32_t size)
94 {
95     struct vda_context *vda_ctx = avctx->hwaccel_context;
96     void *tmp;
97
98     if (!vda_ctx->decoder)
99         return -1;
100
101     tmp = av_fast_realloc(vda_ctx->priv_bitstream,
102                           &vda_ctx->priv_allocated_size,
103                           vda_ctx->priv_bitstream_size + size + 4);
104     if (!tmp)
105         return AVERROR(ENOMEM);
106
107     vda_ctx->priv_bitstream = tmp;
108
109     AV_WB32(vda_ctx->priv_bitstream + vda_ctx->priv_bitstream_size, size);
110     memcpy(vda_ctx->priv_bitstream + vda_ctx->priv_bitstream_size + 4, buffer, size);
111
112     vda_ctx->priv_bitstream_size += size + 4;
113
114     return 0;
115 }
116
117 static void vda_h264_release_buffer(void *opaque, uint8_t *data)
118 {
119     struct vda_buffer *context = opaque;
120     CVPixelBufferRelease(context->cv_buffer);
121     av_free(context);
122 }
123
124 static int vda_h264_end_frame(AVCodecContext *avctx)
125 {
126     H264Context *h                      = avctx->priv_data;
127     struct vda_context *vda_ctx         = avctx->hwaccel_context;
128     AVFrame *frame                      = &h->cur_pic_ptr->f;
129     struct vda_buffer *context;
130     AVBufferRef *buffer;
131     int status;
132
133     if (!vda_ctx->decoder || !vda_ctx->priv_bitstream)
134         return -1;
135
136     status = vda_sync_decode(vda_ctx);
137     frame->data[3] = (void*)vda_ctx->cv_buffer;
138
139     if (status)
140         av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%d)\n", status);
141
142     if (!vda_ctx->use_ref_buffer || status)
143         return status;
144
145     context = av_mallocz(sizeof(*context));
146     buffer = av_buffer_create(NULL, 0, vda_h264_release_buffer, context, 0);
147     if (!context || !buffer) {
148         CVPixelBufferRelease(vda_ctx->cv_buffer);
149         av_free(context);
150         return -1;
151     }
152
153     context->cv_buffer = vda_ctx->cv_buffer;
154     frame->buf[3] = buffer;
155
156     return status;
157 }
158
159 int ff_vda_create_decoder(struct vda_context *vda_ctx,
160                           uint8_t *extradata,
161                           int extradata_size)
162 {
163     OSStatus status;
164     CFNumberRef height;
165     CFNumberRef width;
166     CFNumberRef format;
167     CFDataRef avc_data;
168     CFMutableDictionaryRef config_info;
169     CFMutableDictionaryRef buffer_attributes;
170     CFMutableDictionaryRef io_surface_properties;
171     CFNumberRef cv_pix_fmt;
172
173     vda_ctx->priv_bitstream = NULL;
174     vda_ctx->priv_allocated_size = 0;
175
176     /* Each VCL NAL in the bitstream sent to the decoder
177      * is preceded by a 4 bytes length header.
178      * Change the avcC atom header if needed, to signal headers of 4 bytes. */
179     if (extradata_size >= 4 && (extradata[4] & 0x03) != 0x03) {
180         uint8_t *rw_extradata;
181
182         if (!(rw_extradata = av_malloc(extradata_size)))
183             return AVERROR(ENOMEM);
184
185         memcpy(rw_extradata, extradata, extradata_size);
186
187         rw_extradata[4] |= 0x03;
188
189         avc_data = CFDataCreate(kCFAllocatorDefault, rw_extradata, extradata_size);
190
191         av_freep(&rw_extradata);
192     } else {
193         avc_data = CFDataCreate(kCFAllocatorDefault, extradata, extradata_size);
194     }
195
196     config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
197                                             4,
198                                             &kCFTypeDictionaryKeyCallBacks,
199                                             &kCFTypeDictionaryValueCallBacks);
200
201     height   = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->height);
202     width    = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->width);
203     format   = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->format);
204
205     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Height, height);
206     CFDictionarySetValue(config_info, kVDADecoderConfiguration_Width, width);
207     CFDictionarySetValue(config_info, kVDADecoderConfiguration_SourceFormat, format);
208     CFDictionarySetValue(config_info, kVDADecoderConfiguration_avcCData, avc_data);
209
210     buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
211                                                   2,
212                                                   &kCFTypeDictionaryKeyCallBacks,
213                                                   &kCFTypeDictionaryValueCallBacks);
214     io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
215                                                       0,
216                                                       &kCFTypeDictionaryKeyCallBacks,
217                                                       &kCFTypeDictionaryValueCallBacks);
218     cv_pix_fmt  = CFNumberCreate(kCFAllocatorDefault,
219                                  kCFNumberSInt32Type,
220                                  &vda_ctx->cv_pix_fmt_type);
221     CFDictionarySetValue(buffer_attributes,
222                          kCVPixelBufferPixelFormatTypeKey,
223                          cv_pix_fmt);
224     CFDictionarySetValue(buffer_attributes,
225                          kCVPixelBufferIOSurfacePropertiesKey,
226                          io_surface_properties);
227
228     status = VDADecoderCreate(config_info,
229                               buffer_attributes,
230                               vda_decoder_callback,
231                               vda_ctx,
232                               &vda_ctx->decoder);
233
234     CFRelease(height);
235     CFRelease(width);
236     CFRelease(format);
237     CFRelease(avc_data);
238     CFRelease(config_info);
239     CFRelease(io_surface_properties);
240     CFRelease(cv_pix_fmt);
241     CFRelease(buffer_attributes);
242
243     return status;
244 }
245
246 int ff_vda_destroy_decoder(struct vda_context *vda_ctx)
247 {
248     OSStatus status = kVDADecoderNoErr;
249
250     if (vda_ctx->decoder)
251         status = VDADecoderDestroy(vda_ctx->decoder);
252
253     av_freep(&vda_ctx->priv_bitstream);
254
255     return status;
256 }
257
258 AVHWAccel ff_h264_vda_hwaccel = {
259     .name           = "h264_vda",
260     .type           = AVMEDIA_TYPE_VIDEO,
261     .id             = AV_CODEC_ID_H264,
262     .pix_fmt        = AV_PIX_FMT_VDA_VLD,
263     .start_frame    = vda_h264_start_frame,
264     .decode_slice   = vda_h264_decode_slice,
265     .end_frame      = vda_h264_end_frame,
266 };