summaryrefslogtreecommitdiff
path: root/libavcodec/vda_h264.c
blob: 34fcd3c6e1c475b65ab6f8c59acf82686e52fca4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
/*
 * VDA H.264 hardware acceleration
 *
 * copyright (c) 2011 Sebastien Zwickert
 *
 * This file is part of Libav.
 *
 * Libav is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * Libav is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with Libav; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <CoreFoundation/CFNumber.h>
#include <CoreFoundation/CFData.h>
#include <CoreFoundation/CFString.h>

#include "libavutil/avutil.h"
#include "h264.h"
#include "vda.h"

#if FF_API_VDA_ASYNC
#include <CoreFoundation/CFDictionary.h>

/* helper to create a dictionary according to the given pts */
static CFDictionaryRef vda_dictionary_with_pts(int64_t i_pts)
{
    CFStringRef key           = CFSTR("FF_VDA_DECODER_PTS_KEY");
    CFNumberRef value         = CFNumberCreate(kCFAllocatorDefault,
                                               kCFNumberSInt64Type, &i_pts);
    CFDictionaryRef user_info = CFDictionaryCreate(kCFAllocatorDefault,
                                                   (const void **)&key,
                                                   (const void **)&value,
                                                   1,
                                                   &kCFTypeDictionaryKeyCallBacks,
                                                   &kCFTypeDictionaryValueCallBacks);
    CFRelease(value);
    return user_info;
}

/* helper to retrieve the pts from the given dictionary */
static int64_t vda_pts_from_dictionary(CFDictionaryRef user_info)
{
    CFNumberRef pts;
    int64_t outValue = 0;

    if (!user_info)
        return 0;

    pts = CFDictionaryGetValue(user_info, CFSTR("FF_VDA_DECODER_PTS_KEY"));

    if (pts)
        CFNumberGetValue(pts, kCFNumberSInt64Type, &outValue);

    return outValue;
}

/* Remove and release all frames from the queue. */
static void vda_clear_queue(struct vda_context *vda_ctx)
{
    vda_frame *top_frame;

    pthread_mutex_lock(&vda_ctx->queue_mutex);

    while (vda_ctx->queue) {
        top_frame      = vda_ctx->queue;
        vda_ctx->queue = top_frame->next_frame;
        ff_vda_release_vda_frame(top_frame);
    }

    pthread_mutex_unlock(&vda_ctx->queue_mutex);
}

static int vda_decoder_decode(struct vda_context *vda_ctx,
                              uint8_t *bitstream,
                              int bitstream_size,
                              int64_t frame_pts)
{
    OSStatus status = kVDADecoderNoErr;
    CFDictionaryRef user_info;
    CFDataRef coded_frame;

    coded_frame = CFDataCreate(kCFAllocatorDefault, bitstream, bitstream_size);
    user_info   = vda_dictionary_with_pts(frame_pts);
    status      = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, user_info);

    CFRelease(user_info);
    CFRelease(coded_frame);

    return status;
}

vda_frame *ff_vda_queue_pop(struct vda_context *vda_ctx)
{
    vda_frame *top_frame;

    if (!vda_ctx->queue)
        return NULL;

    pthread_mutex_lock(&vda_ctx->queue_mutex);
    top_frame      = vda_ctx->queue;
    vda_ctx->queue = top_frame->next_frame;
    pthread_mutex_unlock(&vda_ctx->queue_mutex);

    return top_frame;
}

void ff_vda_release_vda_frame(vda_frame *frame)
{
    if (frame) {
        CVPixelBufferRelease(frame->cv_buffer);
        av_freep(&frame);
    }
}
#endif

/* Decoder callback that adds the VDA frame to the queue in display order. */
static void vda_decoder_callback(void *vda_hw_ctx,
                                 CFDictionaryRef user_info,
                                 OSStatus status,
                                 uint32_t infoFlags,
                                 CVImageBufferRef image_buffer)
{
    struct vda_context *vda_ctx = vda_hw_ctx;

    if (!image_buffer)
        return;

    if (vda_ctx->cv_pix_fmt_type != CVPixelBufferGetPixelFormatType(image_buffer))
        return;

    if (vda_ctx->use_sync_decoding) {
        vda_ctx->cv_buffer = CVPixelBufferRetain(image_buffer);
    } else {
        vda_frame *new_frame;
        vda_frame *queue_walker;

        if (!(new_frame = av_mallocz(sizeof(*new_frame))))
            return;
        new_frame->next_frame = NULL;
        new_frame->cv_buffer  = CVPixelBufferRetain(image_buffer);
        new_frame->pts        = vda_pts_from_dictionary(user_info);

        pthread_mutex_lock(&vda_ctx->queue_mutex);

        queue_walker = vda_ctx->queue;

        if (!queue_walker || new_frame->pts < queue_walker->pts) {
            /* we have an empty queue, or this frame earlier than the current queue head */
            new_frame->next_frame = queue_walker;
            vda_ctx->queue        = new_frame;
        } else {
            /* walk the queue and insert this frame where it belongs in display order */
            vda_frame *next_frame;
            while (1) {
                next_frame = queue_walker->next_frame;
                if (!next_frame || new_frame->pts < next_frame->pts) {
                    new_frame->next_frame    = next_frame;
                    queue_walker->next_frame = new_frame;
                    break;
                }
                queue_walker = next_frame;
            }
        }

        pthread_mutex_unlock(&vda_ctx->queue_mutex);
    }
}

static int vda_sync_decode(struct vda_context *vda_ctx)
{
    OSStatus status;
    CFDataRef coded_frame;
    uint32_t flush_flags = 1 << 0; ///< kVDADecoderFlush_emitFrames

    coded_frame = CFDataCreate(kCFAllocatorDefault,
                               vda_ctx->priv_bitstream,
                               vda_ctx->priv_bitstream_size);

    status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, NULL);

    if (kVDADecoderNoErr == status)
        status = VDADecoderFlush(vda_ctx->decoder, flush_flags);

    CFRelease(coded_frame);

    return status;
}


static int start_frame(AVCodecContext *avctx,
                       av_unused const uint8_t *buffer,
                       av_unused uint32_t size)
{
    struct vda_context *vda_ctx         = avctx->hwaccel_context;

    if (!vda_ctx->decoder)
        return -1;

    vda_ctx->priv_bitstream_size = 0;

    return 0;
}

static int decode_slice(AVCodecContext *avctx,
                        const uint8_t *buffer,
                        uint32_t size)
{
    struct vda_context *vda_ctx         = avctx->hwaccel_context;
    void *tmp;

    if (!vda_ctx->decoder)
        return -1;

    tmp = av_fast_realloc(vda_ctx->priv_bitstream,
                          &vda_ctx->priv_allocated_size,
                          vda_ctx->priv_bitstream_size + size + 4);
    if (!tmp)
        return AVERROR(ENOMEM);

    vda_ctx->priv_bitstream = tmp;

    AV_WB32(vda_ctx->priv_bitstream + vda_ctx->priv_bitstream_size, size);
    memcpy(vda_ctx->priv_bitstream + vda_ctx->priv_bitstream_size + 4, buffer, size);

    vda_ctx->priv_bitstream_size += size + 4;

    return 0;
}

static int end_frame(AVCodecContext *avctx)
{
    H264Context *h                      = avctx->priv_data;
    struct vda_context *vda_ctx         = avctx->hwaccel_context;
    AVFrame *frame                      = &h->s.current_picture_ptr->f;
    int status;

    if (!vda_ctx->decoder || !vda_ctx->priv_bitstream)
        return -1;

    if (vda_ctx->use_sync_decoding) {
        status = vda_sync_decode(vda_ctx);
        frame->data[3] = (void*)vda_ctx->cv_buffer;
    } else {
        status = vda_decoder_decode(vda_ctx, vda_ctx->priv_bitstream,
                                    vda_ctx->priv_bitstream_size,
                                    frame->reordered_opaque);
    }

    if (status)
        av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%d)\n", status);

    return status;
}

int ff_vda_create_decoder(struct vda_context *vda_ctx,
                          uint8_t *extradata,
                          int extradata_size)
{
    OSStatus status = kVDADecoderNoErr;
    CFNumberRef height;
    CFNumberRef width;
    CFNumberRef format;
    CFDataRef avc_data;
    CFMutableDictionaryRef config_info;
    CFMutableDictionaryRef buffer_attributes;
    CFMutableDictionaryRef io_surface_properties;
    CFNumberRef cv_pix_fmt;

#if FF_API_VDA_ASYNC
    pthread_mutex_init(&vda_ctx->queue_mutex, NULL);
#endif

    /* Each VCL NAL in the bistream sent to the decoder
     * is preceded by a 4 bytes length header.
     * Change the avcC atom header if needed, to signal headers of 4 bytes. */
    if (extradata_size >= 4 && (extradata[4] & 0x03) != 0x03) {
        uint8_t *rw_extradata;

        if (!(rw_extradata = av_malloc(extradata_size)))
            return AVERROR(ENOMEM);

        memcpy(rw_extradata, extradata, extradata_size);

        rw_extradata[4] |= 0x03;

        avc_data = CFDataCreate(kCFAllocatorDefault, rw_extradata, extradata_size);

        av_freep(&rw_extradata);
    } else {
        avc_data = CFDataCreate(kCFAllocatorDefault, extradata, extradata_size);
    }

    config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
                                            4,
                                            &kCFTypeDictionaryKeyCallBacks,
                                            &kCFTypeDictionaryValueCallBacks);

    height   = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->height);
    width    = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->width);
    format   = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->format);

    CFDictionarySetValue(config_info, kVDADecoderConfiguration_Height, height);
    CFDictionarySetValue(config_info, kVDADecoderConfiguration_Width, width);
    CFDictionarySetValue(config_info, kVDADecoderConfiguration_SourceFormat, format);
    CFDictionarySetValue(config_info, kVDADecoderConfiguration_avcCData, avc_data);

    buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
                                                  2,
                                                  &kCFTypeDictionaryKeyCallBacks,
                                                  &kCFTypeDictionaryValueCallBacks);
    io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
                                                      0,
                                                      &kCFTypeDictionaryKeyCallBacks,
                                                      &kCFTypeDictionaryValueCallBacks);
    cv_pix_fmt      = CFNumberCreate(kCFAllocatorDefault,
                                     kCFNumberSInt32Type,
                                     &vda_ctx->cv_pix_fmt_type);
    CFDictionarySetValue(buffer_attributes,
                         kCVPixelBufferPixelFormatTypeKey,
                         cv_pix_fmt);
    CFDictionarySetValue(buffer_attributes,
                         kCVPixelBufferIOSurfacePropertiesKey,
                         io_surface_properties);

    status = VDADecoderCreate(config_info,
                              buffer_attributes,
                              vda_decoder_callback,
                              vda_ctx,
                              &vda_ctx->decoder);

    CFRelease(height);
    CFRelease(width);
    CFRelease(format);
    CFRelease(avc_data);
    CFRelease(config_info);
    CFRelease(io_surface_properties);
    CFRelease(cv_pix_fmt);
    CFRelease(buffer_attributes);

    return status;
}

int ff_vda_destroy_decoder(struct vda_context *vda_ctx)
{
    OSStatus status = kVDADecoderNoErr;

    if (vda_ctx->decoder)
        status = VDADecoderDestroy(vda_ctx->decoder);

#if FF_API_VDA_ASYNC
    vda_clear_queue(vda_ctx);
    pthread_mutex_destroy(&vda_ctx->queue_mutex);
#endif

    av_freep(&vda_ctx->priv_bitstream);

    return status;
}

AVHWAccel ff_h264_vda_hwaccel = {
    .name           = "h264_vda",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_H264,
    .pix_fmt        = AV_PIX_FMT_VDA_VLD,
    .start_frame    = start_frame,
    .decode_slice   = decode_slice,
    .end_frame      = end_frame,
};