2 * VDA H264 HW acceleration.
4 * copyright (c) 2011 Sebastien Zwickert
6 * This file is part of FFmpeg.
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.
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.
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
23 #include <CoreFoundation/CFDictionary.h>
24 #include <CoreFoundation/CFNumber.h>
25 #include <CoreFoundation/CFData.h>
28 #include "libavutil/avutil.h"
32 CVPixelBufferRef cv_buffer;
35 #include "vda_internal.h"
37 typedef struct VDAContext {
38 // The current bitstream buffer.
41 // The current size of the bitstream.
44 // The reference size used for fast reallocation.
47 CVImageBufferRef frame;
50 /* Decoder callback that adds the vda frame to the queue in display order. */
51 static void vda_decoder_callback(void *vda_hw_ctx,
52 CFDictionaryRef user_info,
55 CVImageBufferRef image_buffer)
57 struct vda_context *vda_ctx = vda_hw_ctx;
59 if (infoFlags & kVDADecodeInfo_FrameDropped)
60 vda_ctx->cv_buffer = NULL;
65 if (vda_ctx->cv_pix_fmt_type != CVPixelBufferGetPixelFormatType(image_buffer))
68 vda_ctx->cv_buffer = CVPixelBufferRetain(image_buffer);
71 static int vda_sync_decode(VDAContext *ctx, struct vda_context *vda_ctx)
74 CFDataRef coded_frame;
75 uint32_t flush_flags = 1 << 0; ///< kVDADecoderFlush_emitFrames
77 coded_frame = CFDataCreate(kCFAllocatorDefault,
81 status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, NULL);
83 if (kVDADecoderNoErr == status)
84 status = VDADecoderFlush(vda_ctx->decoder, flush_flags);
86 CFRelease(coded_frame);
92 static int vda_old_h264_start_frame(AVCodecContext *avctx,
93 av_unused const uint8_t *buffer,
94 av_unused uint32_t size)
96 VDAContext *vda = avctx->internal->hwaccel_priv_data;
97 struct vda_context *vda_ctx = avctx->hwaccel_context;
99 if (!vda_ctx->decoder)
102 vda->bitstream_size = 0;
107 static int vda_old_h264_decode_slice(AVCodecContext *avctx,
108 const uint8_t *buffer,
111 VDAContext *vda = avctx->internal->hwaccel_priv_data;
112 struct vda_context *vda_ctx = avctx->hwaccel_context;
115 if (!vda_ctx->decoder)
118 tmp = av_fast_realloc(vda->bitstream,
119 &vda->allocated_size,
120 vda->bitstream_size + size + 4);
122 return AVERROR(ENOMEM);
124 vda->bitstream = tmp;
126 AV_WB32(vda->bitstream + vda->bitstream_size, size);
127 memcpy(vda->bitstream + vda->bitstream_size + 4, buffer, size);
129 vda->bitstream_size += size + 4;
134 static void vda_h264_release_buffer(void *opaque, uint8_t *data)
136 struct vda_buffer *context = opaque;
137 CVPixelBufferRelease(context->cv_buffer);
141 static int vda_old_h264_end_frame(AVCodecContext *avctx)
143 H264Context *h = avctx->priv_data;
144 VDAContext *vda = avctx->internal->hwaccel_priv_data;
145 struct vda_context *vda_ctx = avctx->hwaccel_context;
146 AVFrame *frame = &h->cur_pic_ptr->f;
147 struct vda_buffer *context;
151 if (!vda_ctx->decoder || !vda->bitstream)
154 status = vda_sync_decode(vda, vda_ctx);
155 frame->data[3] = (void*)vda_ctx->cv_buffer;
158 av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%d)\n", status);
160 if (!vda_ctx->use_ref_buffer || status)
163 context = av_mallocz(sizeof(*context));
164 buffer = av_buffer_create(NULL, 0, vda_h264_release_buffer, context, 0);
165 if (!context || !buffer) {
166 CVPixelBufferRelease(vda_ctx->cv_buffer);
171 context->cv_buffer = vda_ctx->cv_buffer;
172 frame->buf[3] = buffer;
177 int ff_vda_create_decoder(struct vda_context *vda_ctx,
186 CFMutableDictionaryRef config_info;
187 CFMutableDictionaryRef buffer_attributes;
188 CFMutableDictionaryRef io_surface_properties;
189 CFNumberRef cv_pix_fmt;
191 vda_ctx->priv_bitstream = NULL;
192 vda_ctx->priv_allocated_size = 0;
194 /* Each VCL NAL in the bitstream sent to the decoder
195 * is preceded by a 4 bytes length header.
196 * Change the avcC atom header if needed, to signal headers of 4 bytes. */
197 if (extradata_size >= 4 && (extradata[4] & 0x03) != 0x03) {
198 uint8_t *rw_extradata;
200 if (!(rw_extradata = av_malloc(extradata_size)))
201 return AVERROR(ENOMEM);
203 memcpy(rw_extradata, extradata, extradata_size);
205 rw_extradata[4] |= 0x03;
207 avc_data = CFDataCreate(kCFAllocatorDefault, rw_extradata, extradata_size);
209 av_freep(&rw_extradata);
211 avc_data = CFDataCreate(kCFAllocatorDefault, extradata, extradata_size);
214 config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
216 &kCFTypeDictionaryKeyCallBacks,
217 &kCFTypeDictionaryValueCallBacks);
219 height = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->height);
220 width = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->width);
221 format = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->format);
223 CFDictionarySetValue(config_info, kVDADecoderConfiguration_Height, height);
224 CFDictionarySetValue(config_info, kVDADecoderConfiguration_Width, width);
225 CFDictionarySetValue(config_info, kVDADecoderConfiguration_SourceFormat, format);
226 CFDictionarySetValue(config_info, kVDADecoderConfiguration_avcCData, avc_data);
228 buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
230 &kCFTypeDictionaryKeyCallBacks,
231 &kCFTypeDictionaryValueCallBacks);
232 io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
234 &kCFTypeDictionaryKeyCallBacks,
235 &kCFTypeDictionaryValueCallBacks);
236 cv_pix_fmt = CFNumberCreate(kCFAllocatorDefault,
238 &vda_ctx->cv_pix_fmt_type);
239 CFDictionarySetValue(buffer_attributes,
240 kCVPixelBufferPixelFormatTypeKey,
242 CFDictionarySetValue(buffer_attributes,
243 kCVPixelBufferIOSurfacePropertiesKey,
244 io_surface_properties);
246 status = VDADecoderCreate(config_info,
248 (VDADecoderOutputCallback *)vda_decoder_callback,
256 CFRelease(config_info);
257 CFRelease(io_surface_properties);
258 CFRelease(cv_pix_fmt);
259 CFRelease(buffer_attributes);
264 int ff_vda_destroy_decoder(struct vda_context *vda_ctx)
266 OSStatus status = kVDADecoderNoErr;
268 if (vda_ctx->decoder)
269 status = VDADecoderDestroy(vda_ctx->decoder);
274 static int vda_h264_uninit(AVCodecContext *avctx)
276 VDAContext *vda = avctx->internal->hwaccel_priv_data;
278 av_freep(&vda->bitstream);
280 CVPixelBufferRelease(vda->frame);
285 AVHWAccel ff_h264_vda_old_hwaccel = {
287 .type = AVMEDIA_TYPE_VIDEO,
288 .id = AV_CODEC_ID_H264,
289 .pix_fmt = AV_PIX_FMT_VDA_VLD,
290 .start_frame = vda_old_h264_start_frame,
291 .decode_slice = vda_old_h264_decode_slice,
292 .end_frame = vda_old_h264_end_frame,
293 .uninit = vda_h264_uninit,
294 .priv_data_size = sizeof(VDAContext),
297 void ff_vda_output_callback(void *opaque,
298 CFDictionaryRef user_info,
301 CVImageBufferRef image_buffer)
303 AVCodecContext *ctx = opaque;
304 VDAContext *vda = ctx->internal->hwaccel_priv_data;
308 CVPixelBufferRelease(vda->frame);
315 vda->frame = CVPixelBufferRetain(image_buffer);
318 static int vda_h264_start_frame(AVCodecContext *avctx,
319 const uint8_t *buffer,
322 VDAContext *vda = avctx->internal->hwaccel_priv_data;
324 vda->bitstream_size = 0;
329 static int vda_h264_decode_slice(AVCodecContext *avctx,
330 const uint8_t *buffer,
333 VDAContext *vda = avctx->internal->hwaccel_priv_data;
336 tmp = av_fast_realloc(vda->bitstream,
337 &vda->allocated_size,
338 vda->bitstream_size + size + 4);
340 return AVERROR(ENOMEM);
342 vda->bitstream = tmp;
344 AV_WB32(vda->bitstream + vda->bitstream_size, size);
345 memcpy(vda->bitstream + vda->bitstream_size + 4, buffer, size);
347 vda->bitstream_size += size + 4;
352 static void release_buffer(void *opaque, uint8_t *data)
354 CVImageBufferRef frame = (CVImageBufferRef)data;
355 CVPixelBufferRelease(frame);
358 static int vda_h264_end_frame(AVCodecContext *avctx)
360 H264Context *h = avctx->priv_data;
361 VDAContext *vda = avctx->internal->hwaccel_priv_data;
362 AVVDAContext *vda_ctx = avctx->hwaccel_context;
363 AVFrame *frame = &h->cur_pic_ptr->f;
364 uint32_t flush_flags = 1 << 0; ///< kVDADecoderFlush_emitFrames
365 CFDataRef coded_frame;
368 if (!vda->bitstream_size)
369 return AVERROR_INVALIDDATA;
372 coded_frame = CFDataCreate(kCFAllocatorDefault,
374 vda->bitstream_size);
376 status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, NULL);
378 if (status == kVDADecoderNoErr)
379 status = VDADecoderFlush(vda_ctx->decoder, flush_flags);
381 CFRelease(coded_frame);
383 if (status != kVDADecoderNoErr) {
384 av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%d)\n", status);
385 return AVERROR_UNKNOWN;
389 av_buffer_unref(&frame->buf[0]);
391 frame->buf[0] = av_buffer_create((uint8_t*)vda->frame,
393 release_buffer, NULL,
394 AV_BUFFER_FLAG_READONLY);
396 return AVERROR(ENOMEM);
398 frame->data[3] = (uint8_t*)vda->frame;
405 int ff_vda_default_init(AVCodecContext *avctx)
407 AVVDAContext *vda_ctx = avctx->hwaccel_context;
408 OSStatus status = kVDADecoderNoErr;
413 CFMutableDictionaryRef config_info;
414 CFMutableDictionaryRef buffer_attributes;
415 CFMutableDictionaryRef io_surface_properties;
416 CFNumberRef cv_pix_fmt;
417 int32_t fmt = 'avc1', pix_fmt = kCVPixelFormatType_422YpCbCr8;
419 // kCVPixelFormatType_420YpCbCr8Planar;
421 /* Each VCL NAL in the bitstream sent to the decoder
422 * is preceded by a 4 bytes length header.
423 * Change the avcC atom header if needed, to signal headers of 4 bytes. */
424 if (avctx->extradata_size >= 4 && (avctx->extradata[4] & 0x03) != 0x03) {
425 uint8_t *rw_extradata;
427 if (!(rw_extradata = av_malloc(avctx->extradata_size)))
428 return AVERROR(ENOMEM);
430 memcpy(rw_extradata, avctx->extradata, avctx->extradata_size);
432 rw_extradata[4] |= 0x03;
434 avc_data = CFDataCreate(kCFAllocatorDefault, rw_extradata, avctx->extradata_size);
436 av_freep(&rw_extradata);
438 avc_data = CFDataCreate(kCFAllocatorDefault,
439 avctx->extradata, avctx->extradata_size);
442 config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
444 &kCFTypeDictionaryKeyCallBacks,
445 &kCFTypeDictionaryValueCallBacks);
447 height = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &avctx->height);
448 width = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &avctx->width);
449 format = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &fmt);
450 CFDictionarySetValue(config_info, kVDADecoderConfiguration_Height, height);
451 CFDictionarySetValue(config_info, kVDADecoderConfiguration_Width, width);
452 CFDictionarySetValue(config_info, kVDADecoderConfiguration_avcCData, avc_data);
453 CFDictionarySetValue(config_info, kVDADecoderConfiguration_SourceFormat, format);
455 buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
457 &kCFTypeDictionaryKeyCallBacks,
458 &kCFTypeDictionaryValueCallBacks);
459 io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
461 &kCFTypeDictionaryKeyCallBacks,
462 &kCFTypeDictionaryValueCallBacks);
463 cv_pix_fmt = CFNumberCreate(kCFAllocatorDefault,
467 CFDictionarySetValue(buffer_attributes,
468 kCVPixelBufferPixelFormatTypeKey,
470 CFDictionarySetValue(buffer_attributes,
471 kCVPixelBufferIOSurfacePropertiesKey,
472 io_surface_properties);
474 status = VDADecoderCreate(config_info,
476 (VDADecoderOutputCallback *)ff_vda_output_callback,
484 CFRelease(config_info);
485 CFRelease(cv_pix_fmt);
486 CFRelease(io_surface_properties);
487 CFRelease(buffer_attributes);
489 if (status != kVDADecoderNoErr) {
490 av_log(avctx, AV_LOG_ERROR, "Cannot initialize VDA %d\n", status);
494 case kVDADecoderHardwareNotSupportedErr:
495 case kVDADecoderFormatNotSupportedErr:
496 return AVERROR(ENOSYS);
497 case kVDADecoderConfigurationError:
498 return AVERROR(EINVAL);
499 case kVDADecoderDecoderFailedErr:
500 return AVERROR_INVALIDDATA;
501 case kVDADecoderNoErr:
504 return AVERROR_UNKNOWN;
508 static int vda_h264_alloc_frame(AVCodecContext *avctx, AVFrame *frame)
510 frame->width = avctx->width;
511 frame->height = avctx->height;
512 frame->format = avctx->pix_fmt;
513 frame->buf[0] = av_buffer_alloc(1);
516 return AVERROR(ENOMEM);
520 AVHWAccel ff_h264_vda_hwaccel = {
522 .type = AVMEDIA_TYPE_VIDEO,
523 .id = AV_CODEC_ID_H264,
524 .pix_fmt = AV_PIX_FMT_VDA,
525 .alloc_frame = vda_h264_alloc_frame,
526 .start_frame = vda_h264_start_frame,
527 .decode_slice = vda_h264_decode_slice,
528 .end_frame = vda_h264_end_frame,
529 .uninit = vda_h264_uninit,
530 .priv_data_size = sizeof(VDAContext),