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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "media/cast/sender/h264_vt_encoder.h" | 5 #include "content/common/gpu/media/vt_video_encode_accelerator_mac.h" |
6 | 6 |
7 #include <stddef.h> | 7 #include "base/thread_task_runner_handle.h" |
8 | 8 #include "media/base/mac/coremedia_glue.h" |
9 #include <string> | |
10 #include <vector> | |
11 | |
12 #include "base/big_endian.h" | |
13 #include "base/bind.h" | |
14 #include "base/bind_helpers.h" | |
15 #include "base/location.h" | |
16 #include "base/logging.h" | |
17 #include "base/macros.h" | |
18 #include "base/power_monitor/power_monitor.h" | |
19 #include "base/synchronization/lock.h" | |
20 #include "build/build_config.h" | |
21 #include "media/base/mac/corevideo_glue.h" | 9 #include "media/base/mac/corevideo_glue.h" |
22 #include "media/base/mac/video_frame_mac.h" | 10 #include "media/base/mac/video_frame_mac.h" |
23 #include "media/cast/common/rtp_time.h" | 11 |
24 #include "media/cast/constants.h" | 12 namespace content { |
25 #include "media/cast/sender/video_frame_factory.h" | |
26 | |
27 namespace media { | |
28 namespace cast { | |
29 | 13 |
30 namespace { | 14 namespace { |
31 | 15 |
32 // Container for the associated data of a video frame being processed. | 16 // TODO(emircan): Check if we can find the actual system capabilities via |
33 struct InProgressFrameEncode { | 17 // creating VTCompressionSessions with varying requirements. |
34 const RtpTimeTicks rtp_timestamp; | 18 // See crbug.com/584784. |
19 const size_t kBitsPerByte = 8; | |
20 const size_t kDefaultResolutionWidth = 640; | |
21 const size_t kDefaultResolutionHeight = 480; | |
22 const size_t kMaxFrameRateNumerator = 30; | |
23 const size_t kMaxFrameRateDenominator = 1; | |
24 const size_t kMaxResolutionWidth = 4096; | |
25 const size_t kMaxResolutionHeight = 2160; | |
26 const size_t kNumInputBuffers = 3; | |
27 | |
28 } // namespace | |
29 | |
30 struct VTVideoEncodeAccelerator::InProgressFrameEncode { | |
31 InProgressFrameEncode(base::TimeDelta rtp_timestamp, | |
32 base::TimeTicks ref_time) | |
33 : timestamp(rtp_timestamp), reference_time(ref_time) {} | |
34 const base::TimeDelta timestamp; | |
35 const base::TimeTicks reference_time; | 35 const base::TimeTicks reference_time; |
36 const VideoEncoder::FrameEncodedCallback frame_encoded_callback; | 36 |
37 | 37 private: |
38 InProgressFrameEncode(RtpTimeTicks rtp, | 38 DISALLOW_IMPLICIT_CONSTRUCTORS(InProgressFrameEncode); |
39 base::TimeTicks r_time, | |
40 VideoEncoder::FrameEncodedCallback callback) | |
41 : rtp_timestamp(rtp), | |
42 reference_time(r_time), | |
43 frame_encoded_callback(callback) {} | |
44 }; | 39 }; |
45 | 40 |
46 base::ScopedCFTypeRef<CFDictionaryRef> | 41 struct VTVideoEncodeAccelerator::EncodeOutput { |
47 DictionaryWithKeysAndValues(CFTypeRef* keys, CFTypeRef* values, size_t size) { | 42 EncodeOutput(VTEncodeInfoFlags info_flags, CMSampleBufferRef sbuf) |
48 return base::ScopedCFTypeRef<CFDictionaryRef>(CFDictionaryCreate( | 43 : info(info_flags), sample_buffer(sbuf, base::scoped_policy::RETAIN) {} |
49 kCFAllocatorDefault, keys, values, size, &kCFTypeDictionaryKeyCallBacks, | 44 const VTEncodeInfoFlags info; |
50 &kCFTypeDictionaryValueCallBacks)); | 45 const base::ScopedCFTypeRef<CMSampleBufferRef> sample_buffer; |
51 } | 46 |
52 | 47 private: |
53 base::ScopedCFTypeRef<CFDictionaryRef> DictionaryWithKeyValue(CFTypeRef key, | 48 DISALLOW_IMPLICIT_CONSTRUCTORS(EncodeOutput); |
54 CFTypeRef value) { | 49 }; |
55 CFTypeRef keys[1] = {key}; | 50 |
56 CFTypeRef values[1] = {value}; | 51 struct VTVideoEncodeAccelerator::BitstreamBufferRef { |
57 return DictionaryWithKeysAndValues(keys, values, 1); | 52 BitstreamBufferRef(int32_t id, |
58 } | 53 scoped_ptr<base::SharedMemory> shm, |
59 | 54 size_t size) |
60 base::ScopedCFTypeRef<CFArrayRef> ArrayWithIntegers(const int* v, size_t size) { | 55 : id(id), shm(std::move(shm)), size(size) {} |
61 std::vector<CFNumberRef> numbers; | 56 const int32_t id; |
62 numbers.reserve(size); | 57 const scoped_ptr<base::SharedMemory> shm; |
63 for (const int* end = v + size; v < end; ++v) | 58 const size_t size; |
64 numbers.push_back(CFNumberCreate(nullptr, kCFNumberSInt32Type, v)); | 59 |
65 base::ScopedCFTypeRef<CFArrayRef> array(CFArrayCreate( | 60 private: |
66 kCFAllocatorDefault, reinterpret_cast<const void**>(&numbers[0]), | 61 DISALLOW_IMPLICIT_CONSTRUCTORS(BitstreamBufferRef); |
67 numbers.size(), &kCFTypeArrayCallBacks)); | 62 }; |
68 for (auto& number : numbers) { | 63 |
69 CFRelease(number); | 64 VTVideoEncodeAccelerator::VTVideoEncodeAccelerator() |
70 } | 65 : client_task_runner_(base::ThreadTaskRunnerHandle::Get()), |
71 return array; | 66 encoder_thread_("VTEncoderThread"), |
72 } | 67 encoder_task_weak_factory_(this) { |
73 | 68 encoder_weak_ptr_ = encoder_task_weak_factory_.GetWeakPtr(); |
74 template <typename NalSizeType> | 69 } |
75 void CopyNalsToAnnexB(char* avcc_buffer, | 70 |
76 const size_t avcc_size, | 71 VTVideoEncodeAccelerator::~VTVideoEncodeAccelerator() { |
77 std::string* annexb_buffer) { | 72 DVLOG(3) << __FUNCTION__; |
78 static_assert(sizeof(NalSizeType) == 1 || sizeof(NalSizeType) == 2 || | 73 DCHECK(thread_checker_.CalledOnValidThread()); |
79 sizeof(NalSizeType) == 4, | 74 |
80 "NAL size type has unsupported size"); | 75 Destroy(); |
81 static const char startcode_3[3] = {0, 0, 1}; | 76 DCHECK(!encoder_thread_.IsRunning()); |
82 DCHECK(avcc_buffer); | 77 DCHECK(!encoder_task_weak_factory_.HasWeakPtrs()); |
83 DCHECK(annexb_buffer); | 78 } |
84 size_t bytes_left = avcc_size; | 79 |
85 while (bytes_left > 0) { | 80 media::VideoEncodeAccelerator::SupportedProfiles |
86 DCHECK_GT(bytes_left, sizeof(NalSizeType)); | 81 VTVideoEncodeAccelerator::GetSupportedProfiles() { |
87 NalSizeType nal_size; | 82 DVLOG(3) << __FUNCTION__; |
88 base::ReadBigEndian(avcc_buffer, &nal_size); | 83 DCHECK(thread_checker_.CalledOnValidThread()); |
89 bytes_left -= sizeof(NalSizeType); | 84 |
90 avcc_buffer += sizeof(NalSizeType); | 85 SupportedProfiles profiles; |
91 | 86 // Check if HW encoder is supported initially. |
92 DCHECK_GE(bytes_left, nal_size); | 87 videotoolbox_glue_ = VideoToolboxGlue::Get(); |
93 annexb_buffer->append(startcode_3, sizeof(startcode_3)); | 88 if (!videotoolbox_glue_) { |
94 annexb_buffer->append(avcc_buffer, nal_size); | 89 DLOG(ERROR) << "Failed creating VideoToolbox glue."; |
95 bytes_left -= nal_size; | 90 return profiles; |
96 avcc_buffer += nal_size; | 91 } |
97 } | 92 const bool rv = CreateCompressionSession( |
98 } | 93 media::video_toolbox::DictionaryWithKeysAndValues(nullptr, nullptr, 0), |
99 | 94 gfx::Size(kDefaultResolutionWidth, kDefaultResolutionHeight), true); |
100 // Copy a H.264 frame stored in a CM sample buffer to an Annex B buffer. Copies | 95 DestroyCompressionSession(); |
101 // parameter sets for keyframes before the frame data as well. | 96 if (!rv) { |
102 void CopySampleBufferToAnnexBBuffer(CoreMediaGlue::CMSampleBufferRef sbuf, | 97 VLOG(1) << "Failed creating compression session with hardware support."; |
103 std::string* annexb_buffer, | 98 return profiles; |
104 bool keyframe) { | 99 } |
105 // Perform two pass, one to figure out the total output size, and another to | 100 |
106 // copy the data after having performed a single output allocation. Note that | 101 SupportedProfile profile; |
107 // we'll allocate a bit more because we'll count 4 bytes instead of 3 for | 102 profile.profile = media::H264PROFILE_BASELINE; |
108 // video NALs. | 103 profile.max_framerate_numerator = kMaxFrameRateNumerator; |
109 | 104 profile.max_framerate_denominator = kMaxFrameRateDenominator; |
110 OSStatus status; | 105 profile.max_resolution = gfx::Size(kMaxResolutionWidth, kMaxResolutionHeight); |
111 | 106 profiles.push_back(profile); |
112 // Get the sample buffer's block buffer and format description. | 107 return profiles; |
113 auto bb = CoreMediaGlue::CMSampleBufferGetDataBuffer(sbuf); | 108 } |
114 DCHECK(bb); | 109 |
115 auto fdesc = CoreMediaGlue::CMSampleBufferGetFormatDescription(sbuf); | 110 bool VTVideoEncodeAccelerator::Initialize( |
116 DCHECK(fdesc); | 111 media::VideoPixelFormat format, |
117 | 112 const gfx::Size& input_visible_size, |
118 size_t bb_size = CoreMediaGlue::CMBlockBufferGetDataLength(bb); | 113 media::VideoCodecProfile output_profile, |
119 size_t total_bytes = bb_size; | 114 uint32_t initial_bitrate, |
120 | 115 Client* client) { |
121 size_t pset_count; | 116 DVLOG(3) << __FUNCTION__ |
122 int nal_size_field_bytes; | 117 << ": input_format=" << media::VideoPixelFormatToString(format) |
123 status = CoreMediaGlue::CMVideoFormatDescriptionGetH264ParameterSetAtIndex( | 118 << ", input_visible_size=" << input_visible_size.ToString() |
124 fdesc, 0, nullptr, nullptr, &pset_count, &nal_size_field_bytes); | 119 << ", output_profile=" << output_profile |
125 if (status == | 120 << ", initial_bitrate=" << initial_bitrate; |
126 CoreMediaGlue::kCMFormatDescriptionBridgeError_InvalidParameter) { | 121 DCHECK(thread_checker_.CalledOnValidThread()); |
127 DLOG(WARNING) << " assuming 2 parameter sets and 4 bytes NAL length header"; | 122 DCHECK(client); |
128 pset_count = 2; | 123 |
129 nal_size_field_bytes = 4; | 124 if (media::PIXEL_FORMAT_I420 != format) { |
130 } else if (status != noErr) { | 125 DLOG(ERROR) << "Input format not supported= " |
131 DLOG(ERROR) | 126 << media::VideoPixelFormatToString(format); |
132 << " CMVideoFormatDescriptionGetH264ParameterSetAtIndex failed: " | 127 return false; |
133 << status; | 128 } |
134 return; | 129 if (media::H264PROFILE_BASELINE != output_profile) { |
135 } | 130 DLOG(ERROR) << "Output profile not supported= " |
136 | 131 << output_profile; |
137 if (keyframe) { | 132 return false; |
138 const uint8_t* pset; | 133 } |
139 size_t pset_size; | 134 |
140 for (size_t pset_i = 0; pset_i < pset_count; ++pset_i) { | 135 videotoolbox_glue_ = VideoToolboxGlue::Get(); |
141 status = | 136 if (!videotoolbox_glue_) { |
142 CoreMediaGlue::CMVideoFormatDescriptionGetH264ParameterSetAtIndex( | 137 DLOG(ERROR) << "Failed creating VideoToolbox glue."; |
143 fdesc, pset_i, &pset, &pset_size, nullptr, nullptr); | 138 return false; |
144 if (status != noErr) { | 139 } |
145 DLOG(ERROR) | 140 |
146 << " CMVideoFormatDescriptionGetH264ParameterSetAtIndex failed: " | 141 client_ptr_factory_.reset(new base::WeakPtrFactory<Client>(client)); |
147 << status; | 142 client_ = client_ptr_factory_->GetWeakPtr(); |
148 return; | 143 input_visible_size_ = input_visible_size; |
149 } | 144 frame_rate_ = kMaxFrameRateNumerator / kMaxFrameRateDenominator; |
150 total_bytes += pset_size + nal_size_field_bytes; | 145 target_bitrate_ = initial_bitrate; |
151 } | 146 bitstream_buffer_size_ = input_visible_size.GetArea(); |
152 } | 147 |
153 | 148 if (!ResetCompressionSession()) { |
154 annexb_buffer->reserve(total_bytes); | 149 DLOG(ERROR) << "Failed creating compression session."; |
155 | 150 return false; |
156 // Copy all parameter sets before keyframes. | 151 } |
157 if (keyframe) { | 152 |
158 const uint8_t* pset; | 153 if (!encoder_thread_.Start()) { |
159 size_t pset_size; | 154 DLOG(ERROR) << "Failed spawning encoder thread."; |
160 for (size_t pset_i = 0; pset_i < pset_count; ++pset_i) { | 155 return false; |
161 status = | 156 } |
162 CoreMediaGlue::CMVideoFormatDescriptionGetH264ParameterSetAtIndex( | 157 |
163 fdesc, pset_i, &pset, &pset_size, nullptr, nullptr); | 158 client_task_runner_->PostTask( |
164 if (status != noErr) { | 159 FROM_HERE, |
165 DLOG(ERROR) | 160 base::Bind(&Client::RequireBitstreamBuffers, client_, kNumInputBuffers, |
166 << " CMVideoFormatDescriptionGetH264ParameterSetAtIndex failed: " | 161 input_visible_size_, bitstream_buffer_size_)); |
167 << status; | 162 return true; |
168 return; | 163 } |
169 } | 164 |
170 static const char startcode_4[4] = {0, 0, 0, 1}; | 165 void VTVideoEncodeAccelerator::Encode( |
171 annexb_buffer->append(startcode_4, sizeof(startcode_4)); | 166 const scoped_refptr<media::VideoFrame>& frame, |
172 annexb_buffer->append(reinterpret_cast<const char*>(pset), pset_size); | 167 bool force_keyframe) { |
173 } | 168 DVLOG(3) << __FUNCTION__; |
174 } | 169 DCHECK(thread_checker_.CalledOnValidThread()); |
175 | 170 |
176 // Block buffers can be composed of non-contiguous chunks. For the sake of | 171 encoder_thread_.message_loop()->PostTask( |
177 // keeping this code simple, flatten non-contiguous block buffers. | 172 FROM_HERE, |
178 base::ScopedCFTypeRef<CoreMediaGlue::CMBlockBufferRef> contiguous_bb( | 173 base::Bind(&VTVideoEncodeAccelerator::EncodeTask, |
179 bb, base::scoped_policy::RETAIN); | 174 base::Unretained(this), |
180 if (!CoreMediaGlue::CMBlockBufferIsRangeContiguous(bb, 0, 0)) { | 175 frame, |
181 contiguous_bb.reset(); | 176 force_keyframe)); |
182 status = CoreMediaGlue::CMBlockBufferCreateContiguous( | 177 } |
183 kCFAllocatorDefault, bb, kCFAllocatorDefault, nullptr, 0, 0, 0, | 178 |
184 contiguous_bb.InitializeInto()); | 179 void VTVideoEncodeAccelerator::UseOutputBitstreamBuffer( |
185 if (status != noErr) { | 180 const media::BitstreamBuffer& buffer) { |
186 DLOG(ERROR) << " CMBlockBufferCreateContiguous failed: " << status; | 181 DVLOG(3) << __FUNCTION__ << ": buffer size=" << buffer.size(); |
187 return; | 182 DCHECK(thread_checker_.CalledOnValidThread()); |
188 } | 183 |
189 } | 184 if (buffer.size() < bitstream_buffer_size_) { |
190 | 185 DLOG(ERROR) << "Output BitstreamBuffer isn't big enough: " << buffer.size() |
191 // Copy all the NAL units. In the process convert them from AVCC format | 186 << " vs. " << bitstream_buffer_size_; |
192 // (length header) to AnnexB format (start code). | 187 client_->NotifyError(kInvalidArgumentError); |
193 char* bb_data; | 188 return; |
194 status = CoreMediaGlue::CMBlockBufferGetDataPointer(contiguous_bb, 0, nullptr, | 189 } |
195 nullptr, &bb_data); | 190 |
191 scoped_ptr<base::SharedMemory> shm( | |
192 new base::SharedMemory(buffer.handle(), false)); | |
193 if (!shm->Map(buffer.size())) { | |
194 DLOG(ERROR) << "Failed mapping shared memory."; | |
195 client_->NotifyError(kPlatformFailureError); | |
196 return; | |
197 } | |
198 | |
199 scoped_ptr<BitstreamBufferRef> buffer_ref( | |
200 new BitstreamBufferRef(buffer.id(), std::move(shm), buffer.size())); | |
201 | |
202 encoder_thread_.message_loop()->PostTask( | |
203 FROM_HERE, | |
204 base::Bind(&VTVideoEncodeAccelerator::UseOutputBitstreamBufferTask, | |
205 base::Unretained(this), | |
206 base::Passed(&buffer_ref))); | |
207 } | |
208 | |
209 void VTVideoEncodeAccelerator::RequestEncodingParametersChange( | |
210 uint32_t bitrate, | |
211 uint32_t framerate) { | |
212 DVLOG(3) << __FUNCTION__ << ": bitrate=" << bitrate | |
213 << ": framerate=" << framerate; | |
214 DCHECK(thread_checker_.CalledOnValidThread()); | |
215 | |
216 frame_rate_ = framerate > 1 ? framerate : 1; | |
217 target_bitrate_ = bitrate > 1 ? bitrate : 1; | |
218 | |
219 if (!compression_session_) { | |
220 client_->NotifyError(kPlatformFailureError); | |
221 return; | |
222 } | |
223 | |
224 media::video_toolbox::SessionPropertySetter session_property_setter( | |
225 compression_session_, videotoolbox_glue_); | |
226 // TODO(emircan): See crbug.com/425352. | |
227 bool rv = session_property_setter.Set( | |
228 videotoolbox_glue_->kVTCompressionPropertyKey_AverageBitRate(), | |
229 target_bitrate_); | |
230 rv &= session_property_setter.Set( | |
231 videotoolbox_glue_->kVTCompressionPropertyKey_ExpectedFrameRate(), | |
232 frame_rate_); | |
233 rv &= session_property_setter.Set( | |
234 videotoolbox_glue_->kVTCompressionPropertyKey_DataRateLimits(), | |
235 media::video_toolbox::ArrayWithIntegerAndFloat( | |
236 target_bitrate_ / kBitsPerByte, 1.0f)); | |
237 DLOG_IF(ERROR, !rv) << "Couldn't change session encoding parameters."; | |
238 } | |
239 | |
240 void VTVideoEncodeAccelerator::Destroy() { | |
241 DVLOG(3) << __FUNCTION__; | |
242 DCHECK(thread_checker_.CalledOnValidThread()); | |
243 | |
244 // Cancel all callbacks. | |
245 client_ptr_factory_.reset(); | |
246 | |
247 if (encoder_thread_.IsRunning()) { | |
248 encoder_thread_.message_loop()->PostTask( | |
249 FROM_HERE, | |
250 base::Bind(&VTVideoEncodeAccelerator::DestroyTask, | |
251 base::Unretained(this))); | |
252 encoder_thread_.Stop(); | |
253 } else { | |
254 DestroyTask(); | |
255 } | |
256 } | |
257 | |
258 void VTVideoEncodeAccelerator::EncodeTask( | |
259 const scoped_refptr<media::VideoFrame>& frame, | |
260 bool force_keyframe) { | |
261 DCHECK(encoder_thread_.task_runner()->BelongsToCurrentThread()); | |
262 DCHECK(compression_session_); | |
263 DCHECK(frame); | |
264 | |
265 // TODO(emircan): See if we can eliminate a copy here by using | |
266 // CVPixelBufferPool for the allocation of incoming VideoFrames. | |
267 base::ScopedCFTypeRef<CVPixelBufferRef> pixel_buffer = | |
268 media::WrapVideoFrameInCVPixelBuffer(*frame); | |
269 base::ScopedCFTypeRef<CFDictionaryRef> frame_props = | |
270 media::video_toolbox::DictionaryWithKeyValue( | |
271 videotoolbox_glue_->kVTEncodeFrameOptionKey_ForceKeyFrame(), | |
272 force_keyframe ? kCFBooleanTrue : kCFBooleanFalse); | |
273 | |
274 base::TimeTicks ref_time; | |
275 if (!frame->metadata()->GetTimeTicks( | |
276 media::VideoFrameMetadata::REFERENCE_TIME, &ref_time)) { | |
277 ref_time = base::TimeTicks::Now(); | |
278 } | |
279 auto timestamp_cm = CoreMediaGlue::CMTimeMake( | |
280 frame->timestamp().InMicroseconds(), USEC_PER_SEC); | |
281 // Wrap information we'll need after the frame is encoded in a heap object. | |
282 // We'll get the pointer back from the VideoToolbox completion callback. | |
283 scoped_ptr<InProgressFrameEncode> request(new InProgressFrameEncode( | |
284 frame->timestamp(), ref_time)); | |
285 | |
286 OSStatus status = videotoolbox_glue_->VTCompressionSessionEncodeFrame( | |
287 compression_session_, pixel_buffer, timestamp_cm, | |
288 CoreMediaGlue::CMTime{0, 0, 0, 0}, frame_props, | |
289 reinterpret_cast<void*>(request.get()), nullptr); | |
196 if (status != noErr) { | 290 if (status != noErr) { |
197 DLOG(ERROR) << " CMBlockBufferGetDataPointer failed: " << status; | 291 DLOG(ERROR) << " VTCompressionSessionEncodeFrame failed: " << status; |
198 return; | 292 NotifyError(kPlatformFailureError); |
199 } | |
200 | |
201 if (nal_size_field_bytes == 1) { | |
202 CopyNalsToAnnexB<uint8_t>(bb_data, bb_size, annexb_buffer); | |
203 } else if (nal_size_field_bytes == 2) { | |
204 CopyNalsToAnnexB<uint16_t>(bb_data, bb_size, annexb_buffer); | |
205 } else if (nal_size_field_bytes == 4) { | |
206 CopyNalsToAnnexB<uint32_t>(bb_data, bb_size, annexb_buffer); | |
207 } else { | 293 } else { |
208 NOTREACHED(); | 294 // We can pass the ownership to the encode callback if successful. |
209 } | 295 CHECK(request.release()); |
Pawel Osciak
2016/03/11 00:43:59
Unless I'm missing something, we passed a raw poin
emircan
2016/03/11 01:53:20
I am updating the comment. If encode is successful
| |
210 } | 296 } |
211 | 297 } |
212 } // namespace | 298 |
213 | 299 void VTVideoEncodeAccelerator::UseOutputBitstreamBufferTask( |
214 class H264VideoToolboxEncoder::VideoFrameFactoryImpl | 300 scoped_ptr<BitstreamBufferRef> buffer_ref) { |
215 : public base::RefCountedThreadSafe<VideoFrameFactoryImpl>, | 301 DCHECK(encoder_thread_.task_runner()->BelongsToCurrentThread()); |
216 public VideoFrameFactory { | 302 |
217 public: | 303 // If there is already EncodeOutput waiting, copy its output first. |
218 // Type that proxies the VideoFrameFactory interface to this class. | 304 if (!encoder_output_queue_.empty()) { |
219 class Proxy; | 305 scoped_ptr<VTVideoEncodeAccelerator::EncodeOutput> encode_output = |
220 | 306 std::move(encoder_output_queue_.front()); |
221 VideoFrameFactoryImpl(const base::WeakPtr<H264VideoToolboxEncoder>& encoder, | 307 encoder_output_queue_.pop_front(); |
222 const scoped_refptr<CastEnvironment>& cast_environment) | 308 ReturnBitstreamBuffer(std::move(encode_output), std::move(buffer_ref)); |
223 : encoder_(encoder), cast_environment_(cast_environment) {} | 309 return; |
224 | 310 } |
225 scoped_refptr<VideoFrame> MaybeCreateFrame( | 311 |
226 const gfx::Size& frame_size, | 312 bitstream_buffer_queue_.push_back(std::move(buffer_ref)); |
227 base::TimeDelta timestamp) final { | 313 } |
228 if (frame_size.IsEmpty()) { | 314 |
229 DVLOG(1) << "Rejecting empty video frame."; | 315 void VTVideoEncodeAccelerator::DestroyTask() { |
230 return nullptr; | 316 DCHECK(!encoder_thread_.IsRunning() || |
231 } | 317 encoder_thread_.task_runner()->BelongsToCurrentThread()); |
232 | 318 |
233 base::AutoLock auto_lock(lock_); | 319 // Cancel all encoder thread callbacks. |
234 | 320 encoder_task_weak_factory_.InvalidateWeakPtrs(); |
235 // If the pool size does not match, speculatively reset the encoder to use | 321 |
236 // the new size and return null. Cache the new frame size right away and | 322 // This call blocks until all pending frames are flushed out. |
237 // toss away the pixel buffer pool to avoid spurious tasks until the encoder | 323 DestroyCompressionSession(); |
238 // is done resetting. | 324 } |
239 if (frame_size != pool_frame_size_) { | 325 |
240 DVLOG(1) << "MaybeCreateFrame: Detected frame size change."; | 326 void VTVideoEncodeAccelerator::NotifyError( |
241 cast_environment_->PostTask( | 327 media::VideoEncodeAccelerator::Error error) { |
242 CastEnvironment::MAIN, FROM_HERE, | 328 DCHECK(encoder_thread_.task_runner()->BelongsToCurrentThread()); |
243 base::Bind(&H264VideoToolboxEncoder::UpdateFrameSize, encoder_, | 329 client_task_runner_->PostTask( |
244 frame_size)); | 330 FROM_HERE, base::Bind(&Client::NotifyError, client_, error)); |
245 pool_frame_size_ = frame_size; | 331 } |
246 pool_.reset(); | |
247 return nullptr; | |
248 } | |
249 | |
250 if (!pool_) { | |
251 DVLOG(1) << "MaybeCreateFrame: No pixel buffer pool."; | |
252 return nullptr; | |
253 } | |
254 | |
255 // Allocate a pixel buffer from the pool and return a wrapper VideoFrame. | |
256 base::ScopedCFTypeRef<CVPixelBufferRef> buffer; | |
257 auto status = CVPixelBufferPoolCreatePixelBuffer(kCFAllocatorDefault, pool_, | |
258 buffer.InitializeInto()); | |
259 if (status != kCVReturnSuccess) { | |
260 DLOG(ERROR) << "CVPixelBufferPoolCreatePixelBuffer failed: " << status; | |
261 return nullptr; | |
262 } | |
263 | |
264 DCHECK(buffer); | |
265 return VideoFrame::WrapCVPixelBuffer(buffer, timestamp); | |
266 } | |
267 | |
268 void Update(const base::ScopedCFTypeRef<CVPixelBufferPoolRef>& pool, | |
269 const gfx::Size& frame_size) { | |
270 base::AutoLock auto_lock(lock_); | |
271 pool_ = pool; | |
272 pool_frame_size_ = frame_size; | |
273 } | |
274 | |
275 private: | |
276 friend class base::RefCountedThreadSafe<VideoFrameFactoryImpl>; | |
277 ~VideoFrameFactoryImpl() final {} | |
278 | |
279 base::Lock lock_; | |
280 base::ScopedCFTypeRef<CVPixelBufferPoolRef> pool_; | |
281 gfx::Size pool_frame_size_; | |
282 | |
283 // Weak back reference to the encoder and the cast envrionment so we can | |
284 // message the encoder when the frame size changes. | |
285 const base::WeakPtr<H264VideoToolboxEncoder> encoder_; | |
286 const scoped_refptr<CastEnvironment> cast_environment_; | |
287 | |
288 DISALLOW_COPY_AND_ASSIGN(VideoFrameFactoryImpl); | |
289 }; | |
290 | |
291 class H264VideoToolboxEncoder::VideoFrameFactoryImpl::Proxy | |
292 : public VideoFrameFactory { | |
293 public: | |
294 explicit Proxy( | |
295 const scoped_refptr<VideoFrameFactoryImpl>& video_frame_factory) | |
296 : video_frame_factory_(video_frame_factory) { | |
297 DCHECK(video_frame_factory_); | |
298 } | |
299 | |
300 scoped_refptr<VideoFrame> MaybeCreateFrame( | |
301 const gfx::Size& frame_size, | |
302 base::TimeDelta timestamp) final { | |
303 return video_frame_factory_->MaybeCreateFrame(frame_size, timestamp); | |
304 } | |
305 | |
306 private: | |
307 ~Proxy() final {} | |
308 | |
309 const scoped_refptr<VideoFrameFactoryImpl> video_frame_factory_; | |
310 | |
311 DISALLOW_COPY_AND_ASSIGN(Proxy); | |
312 }; | |
313 | 332 |
314 // static | 333 // static |
315 bool H264VideoToolboxEncoder::IsSupported( | 334 void VTVideoEncodeAccelerator::CompressionCallback(void* encoder_opaque, |
316 const VideoSenderConfig& video_config) { | 335 void* request_opaque, |
317 return video_config.codec == CODEC_VIDEO_H264 && VideoToolboxGlue::Get(); | 336 OSStatus status, |
318 } | 337 VTEncodeInfoFlags info, |
319 | 338 CMSampleBufferRef sbuf) { |
320 H264VideoToolboxEncoder::H264VideoToolboxEncoder( | 339 // This function may be called asynchronously, on a different thread from the |
321 const scoped_refptr<CastEnvironment>& cast_environment, | 340 // one that calls VTCompressionSessionEncodeFrame. |
322 const VideoSenderConfig& video_config, | 341 DVLOG(3) << __FUNCTION__; |
323 const StatusChangeCallback& status_change_cb) | 342 |
324 : cast_environment_(cast_environment), | 343 auto encoder = reinterpret_cast<VTVideoEncodeAccelerator*>(encoder_opaque); |
325 videotoolbox_glue_(VideoToolboxGlue::Get()), | 344 DCHECK(encoder); |
326 video_config_(video_config), | 345 |
327 status_change_cb_(status_change_cb), | 346 // Release InProgressFrameEncode, since we don't have support to return |
328 last_frame_id_(kFirstFrameId - 1), | 347 // timestamps at this point. |
329 encode_next_frame_as_keyframe_(false), | 348 scoped_ptr<InProgressFrameEncode> request( |
330 power_suspended_(false), | 349 reinterpret_cast<InProgressFrameEncode*>(request_opaque)); |
331 weak_factory_(this) { | 350 request.reset(); |
332 DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN)); | 351 |
333 DCHECK(!status_change_cb_.is_null()); | 352 // EncodeOutput holds onto CMSampleBufferRef when posting task between |
334 | 353 // threads. |
335 OperationalStatus operational_status = | 354 scoped_ptr<EncodeOutput> encode_output(new EncodeOutput(info, sbuf)); |
336 H264VideoToolboxEncoder::IsSupported(video_config) | 355 |
337 ? STATUS_INITIALIZED | 356 // This method is NOT called on |encoder_thread_|, so we still need to |
338 : STATUS_UNSUPPORTED_CODEC; | 357 // post a task back to it to do work. |
339 cast_environment_->PostTask( | 358 encoder->encoder_thread_.task_runner()->PostTask( |
340 CastEnvironment::MAIN, FROM_HERE, | 359 FROM_HERE, base::Bind(&VTVideoEncodeAccelerator::CompressionCallbackTask, |
341 base::Bind(status_change_cb_, operational_status)); | 360 encoder->encoder_weak_ptr_, status, |
342 | 361 base::Passed(&encode_output))); |
343 if (operational_status == STATUS_INITIALIZED) { | 362 } |
344 // Create the shared video frame factory. It persists for the combined | 363 |
345 // lifetime of the encoder and all video frame factory proxies created by | 364 void VTVideoEncodeAccelerator::CompressionCallbackTask( |
346 // |CreateVideoFrameFactory| that reference it. | 365 OSStatus status, |
347 video_frame_factory_ = | 366 scoped_ptr<EncodeOutput> encode_output) { |
348 scoped_refptr<VideoFrameFactoryImpl>(new VideoFrameFactoryImpl( | 367 DCHECK(encoder_thread_.task_runner()->BelongsToCurrentThread()); |
349 weak_factory_.GetWeakPtr(), cast_environment_)); | 368 |
350 | 369 if (status != noErr) { |
351 // Register for power state changes. | 370 DLOG(ERROR) << " encode failed: " << status; |
352 auto power_monitor = base::PowerMonitor::Get(); | 371 NotifyError(kPlatformFailureError); |
353 if (power_monitor) { | 372 return; |
354 power_monitor->AddObserver(this); | 373 } |
355 VLOG(1) << "Registered for power state changes."; | 374 |
356 } else { | 375 // If there isn't any BitstreamBuffer to copy into, add it to a queue for |
357 DLOG(WARNING) << "No power monitor. Process suspension will invalidate " | 376 // later use. |
358 "the encoder."; | 377 if (bitstream_buffer_queue_.empty()) { |
359 } | 378 encoder_output_queue_.push_back(std::move(encode_output)); |
360 } | 379 return; |
361 } | 380 } |
362 | 381 |
363 H264VideoToolboxEncoder::~H264VideoToolboxEncoder() { | 382 scoped_ptr<VTVideoEncodeAccelerator::BitstreamBufferRef> buffer_ref = |
383 std::move(bitstream_buffer_queue_.front()); | |
384 bitstream_buffer_queue_.pop_front(); | |
385 ReturnBitstreamBuffer(std::move(encode_output), std::move(buffer_ref)); | |
386 } | |
387 | |
388 void VTVideoEncodeAccelerator::ReturnBitstreamBuffer( | |
389 scoped_ptr<EncodeOutput> encode_output, | |
390 scoped_ptr<VTVideoEncodeAccelerator::BitstreamBufferRef> buffer_ref) { | |
391 DVLOG(3) << __FUNCTION__; | |
392 DCHECK(encoder_thread_.task_runner()->BelongsToCurrentThread()); | |
393 | |
394 if (encode_output->info & VideoToolboxGlue::kVTEncodeInfo_FrameDropped) { | |
395 DVLOG(2) << " frame dropped"; | |
396 client_task_runner_->PostTask( | |
397 FROM_HERE, base::Bind(&Client::BitstreamBufferReady, client_, | |
398 buffer_ref->id, 0, false)); | |
399 return; | |
400 } | |
401 | |
402 auto sample_attachments = static_cast<CFDictionaryRef>(CFArrayGetValueAtIndex( | |
403 CoreMediaGlue::CMSampleBufferGetSampleAttachmentsArray( | |
404 encode_output->sample_buffer.get(), true), | |
405 0)); | |
406 const bool keyframe = | |
407 !CFDictionaryContainsKey(sample_attachments, | |
408 CoreMediaGlue::kCMSampleAttachmentKey_NotSync()); | |
409 | |
410 size_t used_buffer_size = 0; | |
411 const bool copy_rv = media::video_toolbox::CopySampleBufferToAnnexBBuffer( | |
412 encode_output->sample_buffer.get(), keyframe, buffer_ref->size, | |
413 reinterpret_cast<char*>(buffer_ref->shm->memory()), &used_buffer_size); | |
414 if (!copy_rv) { | |
415 DLOG(ERROR) << "Cannot copy output from SampleBuffer to AnnexBBuffer."; | |
416 used_buffer_size = 0; | |
417 } | |
418 | |
419 client_task_runner_->PostTask( | |
420 FROM_HERE, base::Bind(&Client::BitstreamBufferReady, client_, | |
421 buffer_ref->id, used_buffer_size, keyframe)); | |
422 } | |
423 | |
424 bool VTVideoEncodeAccelerator::ResetCompressionSession() { | |
425 DCHECK(thread_checker_.CalledOnValidThread()); | |
426 | |
364 DestroyCompressionSession(); | 427 DestroyCompressionSession(); |
365 | 428 |
366 // If video_frame_factory_ is not null, the encoder registered for power state | 429 CFTypeRef attributes_keys[] = { |
367 // changes in the ctor and it must now unregister. | 430 kCVPixelBufferOpenGLCompatibilityKey, |
368 if (video_frame_factory_) { | 431 kCVPixelBufferIOSurfacePropertiesKey, |
369 auto power_monitor = base::PowerMonitor::Get(); | 432 kCVPixelBufferPixelFormatTypeKey |
370 if (power_monitor) | 433 }; |
371 power_monitor->RemoveObserver(this); | |
372 } | |
373 } | |
374 | |
375 void H264VideoToolboxEncoder::ResetCompressionSession() { | |
376 DCHECK(thread_checker_.CalledOnValidThread()); | |
377 | |
378 // Ignore reset requests while power suspended. | |
379 if (power_suspended_) | |
380 return; | |
381 | |
382 // Notify that we're resetting the encoder. | |
383 cast_environment_->PostTask( | |
384 CastEnvironment::MAIN, FROM_HERE, | |
385 base::Bind(status_change_cb_, STATUS_CODEC_REINIT_PENDING)); | |
386 | |
387 // Destroy the current session, if any. | |
388 DestroyCompressionSession(); | |
389 | |
390 // On OS X, allow the hardware encoder. Don't require it, it does not support | |
391 // all configurations (some of which are used for testing). | |
392 base::ScopedCFTypeRef<CFDictionaryRef> encoder_spec; | |
393 #if !defined(OS_IOS) | |
394 encoder_spec = DictionaryWithKeyValue( | |
395 videotoolbox_glue_ | |
396 ->kVTVideoEncoderSpecification_EnableHardwareAcceleratedVideoEncoder() , | |
397 kCFBooleanTrue); | |
398 #endif | |
399 | |
400 // Force 420v so that clients can easily use these buffers as GPU textures. | |
401 const int format[] = { | 434 const int format[] = { |
402 CoreVideoGlue::kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange}; | 435 CoreVideoGlue::kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange}; |
403 | 436 CFTypeRef attributes_values[] = { |
404 // Keep these attachment settings in-sync with those in ConfigureSession(). | 437 kCFBooleanTrue, |
405 CFTypeRef attachments_keys[] = {kCVImageBufferColorPrimariesKey, | 438 media::video_toolbox::DictionaryWithKeysAndValues(nullptr, nullptr, 0) |
406 kCVImageBufferTransferFunctionKey, | 439 .release(), |
407 kCVImageBufferYCbCrMatrixKey}; | 440 media::video_toolbox::ArrayWithIntegers(format, arraysize(format)) |
408 CFTypeRef attachments_values[] = {kCVImageBufferColorPrimaries_ITU_R_709_2, | 441 .release()}; |
409 kCVImageBufferTransferFunction_ITU_R_709_2, | 442 const base::ScopedCFTypeRef<CFDictionaryRef> attributes = |
410 kCVImageBufferYCbCrMatrix_ITU_R_709_2}; | 443 media::video_toolbox::DictionaryWithKeysAndValues( |
411 CFTypeRef buffer_attributes_keys[] = {kCVPixelBufferPixelFormatTypeKey, | 444 attributes_keys, attributes_values, arraysize(attributes_keys)); |
412 kCVBufferPropagatedAttachmentsKey}; | 445 for (auto& v : attributes_values) |
413 CFTypeRef buffer_attributes_values[] = { | |
414 ArrayWithIntegers(format, arraysize(format)).release(), | |
415 DictionaryWithKeysAndValues(attachments_keys, attachments_values, | |
416 arraysize(attachments_keys)).release()}; | |
417 const base::ScopedCFTypeRef<CFDictionaryRef> buffer_attributes = | |
418 DictionaryWithKeysAndValues(buffer_attributes_keys, | |
419 buffer_attributes_values, | |
420 arraysize(buffer_attributes_keys)); | |
421 for (auto& v : buffer_attributes_values) | |
422 CFRelease(v); | 446 CFRelease(v); |
423 | 447 |
448 bool session_rv = | |
449 CreateCompressionSession(attributes, input_visible_size_, true); | |
450 if (!session_rv) { | |
451 // Our experiments showed that VideoToolbox falls to SW for resolutions | |
452 // below 480x360. For clients that might downgrade to these lower | |
453 // resolutions, we need to create a session. | |
454 DestroyCompressionSession(); | |
455 session_rv = | |
456 CreateCompressionSession(attributes, input_visible_size_, false); | |
457 if (!session_rv) { | |
458 DestroyCompressionSession(); | |
459 return false; | |
460 } | |
461 } | |
462 | |
463 const bool configure_rv = ConfigureCompressionSession(); | |
464 if (configure_rv) | |
465 RequestEncodingParametersChange(target_bitrate_, frame_rate_); | |
466 return configure_rv; | |
467 } | |
468 | |
469 bool VTVideoEncodeAccelerator::CreateCompressionSession( | |
470 base::ScopedCFTypeRef<CFDictionaryRef> attributes, | |
471 const gfx::Size& input_size, | |
472 bool require_hw_encoding) { | |
473 DCHECK(thread_checker_.CalledOnValidThread()); | |
474 | |
475 std::vector<CFTypeRef> encoder_keys; | |
476 std::vector<CFTypeRef> encoder_values; | |
477 encoder_keys.push_back(videotoolbox_glue_ | |
478 ->kVTVideoEncoderSpecification_EnableHardwareAcceleratedVideoEncoder()); | |
479 encoder_values.push_back(kCFBooleanTrue); | |
480 | |
481 if (require_hw_encoding) { | |
482 encoder_keys.push_back( | |
483 videotoolbox_glue_ | |
484 ->kVTVideoEncoderSpecification_RequireHardwareAcceleratedVideoEncoder()); | |
485 encoder_values.push_back(kCFBooleanTrue); | |
486 } | |
487 base::ScopedCFTypeRef<CFDictionaryRef> encoder_spec = | |
488 media::video_toolbox::DictionaryWithKeysAndValues( | |
489 encoder_keys.data(), encoder_values.data(), encoder_keys.size()); | |
490 | |
424 // Create the compression session. | 491 // Create the compression session. |
425 | |
426 // Note that the encoder object is given to the compression session as the | 492 // Note that the encoder object is given to the compression session as the |
427 // callback context using a raw pointer. The C API does not allow us to use a | 493 // callback context using a raw pointer. The C API does not allow us to use a |
428 // smart pointer, nor is this encoder ref counted. However, this is still | 494 // smart pointer, nor is this encoder ref counted. However, this is still |
429 // safe, because we 1) we own the compression session and 2) we tear it down | 495 // safe, because we 1) we own the compression session and 2) we tear it down |
430 // safely. When destructing the encoder, the compression session is flushed | 496 // safely. When destructing the encoder, the compression session is flushed |
431 // and invalidated. Internally, VideoToolbox will join all of its threads | 497 // and invalidated. Internally, VideoToolbox will join all of its threads |
432 // before returning to the client. Therefore, when control returns to us, we | 498 // before returning to the client. Therefore, when control returns to us, we |
433 // are guaranteed that the output callback will not execute again. | 499 // are guaranteed that the output callback will not execute again. |
434 OSStatus status = videotoolbox_glue_->VTCompressionSessionCreate( | 500 OSStatus status = videotoolbox_glue_->VTCompressionSessionCreate( |
435 kCFAllocatorDefault, frame_size_.width(), frame_size_.height(), | 501 kCFAllocatorDefault, |
436 CoreMediaGlue::kCMVideoCodecType_H264, encoder_spec, buffer_attributes, | 502 input_size.width(), |
503 input_size.height(), | |
504 CoreMediaGlue::kCMVideoCodecType_H264, | |
505 encoder_spec, | |
506 attributes, | |
437 nullptr /* compressedDataAllocator */, | 507 nullptr /* compressedDataAllocator */, |
438 &H264VideoToolboxEncoder::CompressionCallback, | 508 &VTVideoEncodeAccelerator::CompressionCallback, |
439 reinterpret_cast<void*>(this), compression_session_.InitializeInto()); | 509 reinterpret_cast<void*>(this), |
510 compression_session_.InitializeInto()); | |
440 if (status != noErr) { | 511 if (status != noErr) { |
441 DLOG(ERROR) << " VTCompressionSessionCreate failed: " << status; | 512 DLOG(ERROR) << " VTCompressionSessionCreate failed: " << status; |
442 // Notify that reinitialization has failed. | 513 return false; |
443 cast_environment_->PostTask( | 514 } |
444 CastEnvironment::MAIN, FROM_HERE, | 515 DVLOG(3) << " VTCompressionSession created with HW encode: " |
445 base::Bind(status_change_cb_, STATUS_CODEC_INIT_FAILED)); | 516 << require_hw_encoding << ", input size=" << input_size.ToString(); |
446 return; | 517 return true; |
447 } | 518 } |
448 | 519 |
449 // Configure the session (apply session properties based on the current state | 520 bool VTVideoEncodeAccelerator::ConfigureCompressionSession() { |
450 // of the encoder, experimental tuning and requirements). | 521 DCHECK(thread_checker_.CalledOnValidThread()); |
451 ConfigureCompressionSession(); | 522 DCHECK(compression_session_); |
452 | 523 |
453 // Update the video frame factory. | 524 media::video_toolbox::SessionPropertySetter session_property_setter( |
454 base::ScopedCFTypeRef<CVPixelBufferPoolRef> pool( | 525 compression_session_, videotoolbox_glue_); |
455 videotoolbox_glue_->VTCompressionSessionGetPixelBufferPool( | 526 bool rv = true; |
456 compression_session_), | 527 rv &= session_property_setter.Set( |
457 base::scoped_policy::RETAIN); | |
458 video_frame_factory_->Update(pool, frame_size_); | |
459 | |
460 // Notify that reinitialization is done. | |
461 cast_environment_->PostTask( | |
462 CastEnvironment::MAIN, FROM_HERE, | |
463 base::Bind(status_change_cb_, STATUS_INITIALIZED)); | |
464 } | |
465 | |
466 void H264VideoToolboxEncoder::ConfigureCompressionSession() { | |
467 SetSessionProperty( | |
468 videotoolbox_glue_->kVTCompressionPropertyKey_ProfileLevel(), | 528 videotoolbox_glue_->kVTCompressionPropertyKey_ProfileLevel(), |
469 videotoolbox_glue_->kVTProfileLevel_H264_Main_AutoLevel()); | 529 videotoolbox_glue_->kVTProfileLevel_H264_Baseline_AutoLevel()); |
470 SetSessionProperty(videotoolbox_glue_->kVTCompressionPropertyKey_RealTime(), | 530 rv &= session_property_setter.Set( |
471 true); | 531 videotoolbox_glue_->kVTCompressionPropertyKey_RealTime(), true); |
472 SetSessionProperty( | 532 rv &= session_property_setter.Set( |
473 videotoolbox_glue_->kVTCompressionPropertyKey_AllowFrameReordering(), | 533 videotoolbox_glue_->kVTCompressionPropertyKey_AllowFrameReordering(), |
474 false); | 534 false); |
475 SetSessionProperty( | 535 DLOG_IF(ERROR, !rv) << " Setting session property failed."; |
476 videotoolbox_glue_->kVTCompressionPropertyKey_MaxKeyFrameInterval(), 240); | 536 return rv; |
477 SetSessionProperty( | 537 } |
478 videotoolbox_glue_ | 538 |
479 ->kVTCompressionPropertyKey_MaxKeyFrameIntervalDuration(), | 539 void VTVideoEncodeAccelerator::DestroyCompressionSession() { |
480 240); | 540 // This method may be called on |encoder thread| or GPU child thread. |
481 // TODO(jfroy): implement better bitrate control | 541 |
482 // https://crbug.com/425352 | |
483 SetSessionProperty( | |
484 videotoolbox_glue_->kVTCompressionPropertyKey_AverageBitRate(), | |
485 (video_config_.min_bitrate + video_config_.max_bitrate) / 2); | |
486 SetSessionProperty( | |
487 videotoolbox_glue_->kVTCompressionPropertyKey_ExpectedFrameRate(), | |
488 video_config_.max_frame_rate); | |
489 // Keep these attachment settings in-sync with those in Initialize(). | |
490 SetSessionProperty( | |
491 videotoolbox_glue_->kVTCompressionPropertyKey_ColorPrimaries(), | |
492 kCVImageBufferColorPrimaries_ITU_R_709_2); | |
493 SetSessionProperty( | |
494 videotoolbox_glue_->kVTCompressionPropertyKey_TransferFunction(), | |
495 kCVImageBufferTransferFunction_ITU_R_709_2); | |
496 SetSessionProperty( | |
497 videotoolbox_glue_->kVTCompressionPropertyKey_YCbCrMatrix(), | |
498 kCVImageBufferYCbCrMatrix_ITU_R_709_2); | |
499 if (video_config_.max_number_of_video_buffers_used > 0) { | |
500 SetSessionProperty( | |
501 videotoolbox_glue_->kVTCompressionPropertyKey_MaxFrameDelayCount(), | |
502 video_config_.max_number_of_video_buffers_used); | |
503 } | |
504 } | |
505 | |
506 void H264VideoToolboxEncoder::DestroyCompressionSession() { | |
507 DCHECK(thread_checker_.CalledOnValidThread()); | |
508 | |
509 // If the compression session exists, invalidate it. This blocks until all | |
510 // pending output callbacks have returned and any internal threads have | |
511 // joined, ensuring no output callback ever sees a dangling encoder pointer. | |
512 // | |
513 // Before destroying the compression session, the video frame factory's pool | |
514 // is updated to null so that no thread will produce new video frames via the | |
515 // factory until a new compression session is created. The current frame size | |
516 // is passed to prevent the video frame factory from posting |UpdateFrameSize| | |
517 // tasks. Indeed, |DestroyCompressionSession| is either called from | |
518 // |ResetCompressionSession|, in which case a new pool and frame size will be | |
519 // set, or from callsites that require that there be no compression session | |
520 // (ex: the dtor). | |
521 if (compression_session_) { | 542 if (compression_session_) { |
522 video_frame_factory_->Update( | |
523 base::ScopedCFTypeRef<CVPixelBufferPoolRef>(nullptr), frame_size_); | |
524 videotoolbox_glue_->VTCompressionSessionInvalidate(compression_session_); | 543 videotoolbox_glue_->VTCompressionSessionInvalidate(compression_session_); |
525 compression_session_.reset(); | 544 compression_session_.reset(); |
526 } | 545 } |
527 } | 546 } |
528 | 547 |
529 bool H264VideoToolboxEncoder::EncodeVideoFrame( | 548 } // namespace content |
530 const scoped_refptr<media::VideoFrame>& video_frame, | |
531 const base::TimeTicks& reference_time, | |
532 const FrameEncodedCallback& frame_encoded_callback) { | |
533 DCHECK(thread_checker_.CalledOnValidThread()); | |
534 DCHECK(!frame_encoded_callback.is_null()); | |
535 | |
536 // Reject empty video frames. | |
537 const gfx::Size frame_size = video_frame->visible_rect().size(); | |
538 if (frame_size.IsEmpty()) { | |
539 DVLOG(1) << "Rejecting empty video frame."; | |
540 return false; | |
541 } | |
542 | |
543 // Handle frame size changes. This will reset the compression session. | |
544 if (frame_size != frame_size_) { | |
545 DVLOG(1) << "EncodeVideoFrame: Detected frame size change."; | |
546 UpdateFrameSize(frame_size); | |
547 } | |
548 | |
549 // Need a compression session to continue. | |
550 if (!compression_session_) { | |
551 DLOG(ERROR) << "No compression session."; | |
552 return false; | |
553 } | |
554 | |
555 // Wrap the VideoFrame in a CVPixelBuffer. In all cases, no data will be | |
556 // copied. If the VideoFrame was created by this encoder's video frame | |
557 // factory, then the returned CVPixelBuffer will have been obtained from the | |
558 // compression session's pixel buffer pool. This will eliminate a copy of the | |
559 // frame into memory visible by the hardware encoder. The VideoFrame's | |
560 // lifetime is extended for the lifetime of the returned CVPixelBuffer. | |
561 auto pixel_buffer = media::WrapVideoFrameInCVPixelBuffer(*video_frame); | |
562 if (!pixel_buffer) { | |
563 DLOG(ERROR) << "WrapVideoFrameInCVPixelBuffer failed."; | |
564 return false; | |
565 } | |
566 | |
567 // Convert the frame timestamp to CMTime. | |
568 auto timestamp_cm = CoreMediaGlue::CMTimeMake( | |
569 (reference_time - base::TimeTicks()).InMicroseconds(), USEC_PER_SEC); | |
570 | |
571 // Wrap information we'll need after the frame is encoded in a heap object. | |
572 // We'll get the pointer back from the VideoToolbox completion callback. | |
573 scoped_ptr<InProgressFrameEncode> request(new InProgressFrameEncode( | |
574 RtpTimeTicks::FromTimeDelta(video_frame->timestamp(), kVideoFrequency), | |
575 reference_time, frame_encoded_callback)); | |
576 | |
577 // Build a suitable frame properties dictionary for keyframes. | |
578 base::ScopedCFTypeRef<CFDictionaryRef> frame_props; | |
579 if (encode_next_frame_as_keyframe_) { | |
580 frame_props = DictionaryWithKeyValue( | |
581 videotoolbox_glue_->kVTEncodeFrameOptionKey_ForceKeyFrame(), | |
582 kCFBooleanTrue); | |
583 encode_next_frame_as_keyframe_ = false; | |
584 } | |
585 | |
586 // Submit the frame to the compression session. The function returns as soon | |
587 // as the frame has been enqueued. | |
588 OSStatus status = videotoolbox_glue_->VTCompressionSessionEncodeFrame( | |
589 compression_session_, pixel_buffer, timestamp_cm, | |
590 CoreMediaGlue::CMTime{0, 0, 0, 0}, frame_props, | |
591 reinterpret_cast<void*>(request.release()), nullptr); | |
592 if (status != noErr) { | |
593 DLOG(ERROR) << " VTCompressionSessionEncodeFrame failed: " << status; | |
594 return false; | |
595 } | |
596 | |
597 return true; | |
598 } | |
599 | |
600 void H264VideoToolboxEncoder::UpdateFrameSize(const gfx::Size& size_needed) { | |
601 DCHECK(thread_checker_.CalledOnValidThread()); | |
602 | |
603 // Our video frame factory posts a task to update the frame size when its | |
604 // cache of the frame size differs from what the client requested. To avoid | |
605 // spurious encoder resets, check again here. | |
606 if (size_needed == frame_size_) { | |
607 DCHECK(compression_session_); | |
608 return; | |
609 } | |
610 | |
611 VLOG(1) << "Resetting compression session (for frame size change from " | |
612 << frame_size_.ToString() << " to " << size_needed.ToString() << ")."; | |
613 | |
614 // If there is an existing session, finish every pending frame. | |
615 if (compression_session_) { | |
616 EmitFrames(); | |
617 } | |
618 | |
619 // Store the new frame size. | |
620 frame_size_ = size_needed; | |
621 | |
622 // Reset the compression session. | |
623 ResetCompressionSession(); | |
624 } | |
625 | |
626 void H264VideoToolboxEncoder::SetBitRate(int /*new_bit_rate*/) { | |
627 DCHECK(thread_checker_.CalledOnValidThread()); | |
628 // VideoToolbox does not seem to support bitrate reconfiguration. | |
629 } | |
630 | |
631 void H264VideoToolboxEncoder::GenerateKeyFrame() { | |
632 DCHECK(thread_checker_.CalledOnValidThread()); | |
633 encode_next_frame_as_keyframe_ = true; | |
634 } | |
635 | |
636 scoped_ptr<VideoFrameFactory> | |
637 H264VideoToolboxEncoder::CreateVideoFrameFactory() { | |
638 DCHECK(thread_checker_.CalledOnValidThread()); | |
639 return scoped_ptr<VideoFrameFactory>( | |
640 new VideoFrameFactoryImpl::Proxy(video_frame_factory_)); | |
641 } | |
642 | |
643 void H264VideoToolboxEncoder::EmitFrames() { | |
644 DCHECK(thread_checker_.CalledOnValidThread()); | |
645 if (!compression_session_) | |
646 return; | |
647 | |
648 OSStatus status = videotoolbox_glue_->VTCompressionSessionCompleteFrames( | |
649 compression_session_, CoreMediaGlue::CMTime{0, 0, 0, 0}); | |
650 if (status != noErr) { | |
651 DLOG(ERROR) << " VTCompressionSessionCompleteFrames failed: " << status; | |
652 } | |
653 } | |
654 | |
655 void H264VideoToolboxEncoder::OnSuspend() { | |
656 VLOG(1) | |
657 << "OnSuspend: Emitting all frames and destroying compression session."; | |
658 EmitFrames(); | |
659 DestroyCompressionSession(); | |
660 power_suspended_ = true; | |
661 } | |
662 | |
663 void H264VideoToolboxEncoder::OnResume() { | |
664 power_suspended_ = false; | |
665 | |
666 // Reset the compression session only if the frame size is not zero (which | |
667 // will obviously fail). It is possible for the frame size to be zero if no | |
668 // frame was submitted for encoding or requested from the video frame factory | |
669 // before suspension. | |
670 if (!frame_size_.IsEmpty()) { | |
671 VLOG(1) << "OnResume: Resetting compression session."; | |
672 ResetCompressionSession(); | |
673 } | |
674 } | |
675 | |
676 bool H264VideoToolboxEncoder::SetSessionProperty(CFStringRef key, | |
677 int32_t value) { | |
678 base::ScopedCFTypeRef<CFNumberRef> cfvalue( | |
679 CFNumberCreate(nullptr, kCFNumberSInt32Type, &value)); | |
680 return videotoolbox_glue_->VTSessionSetProperty(compression_session_, key, | |
681 cfvalue) == noErr; | |
682 } | |
683 | |
684 bool H264VideoToolboxEncoder::SetSessionProperty(CFStringRef key, bool value) { | |
685 CFBooleanRef cfvalue = (value) ? kCFBooleanTrue : kCFBooleanFalse; | |
686 return videotoolbox_glue_->VTSessionSetProperty(compression_session_, key, | |
687 cfvalue) == noErr; | |
688 } | |
689 | |
690 bool H264VideoToolboxEncoder::SetSessionProperty(CFStringRef key, | |
691 CFStringRef value) { | |
692 return videotoolbox_glue_->VTSessionSetProperty(compression_session_, key, | |
693 value) == noErr; | |
694 } | |
695 | |
696 void H264VideoToolboxEncoder::CompressionCallback(void* encoder_opaque, | |
697 void* request_opaque, | |
698 OSStatus status, | |
699 VTEncodeInfoFlags info, | |
700 CMSampleBufferRef sbuf) { | |
701 auto encoder = reinterpret_cast<H264VideoToolboxEncoder*>(encoder_opaque); | |
702 const scoped_ptr<InProgressFrameEncode> request( | |
703 reinterpret_cast<InProgressFrameEncode*>(request_opaque)); | |
704 bool keyframe = false; | |
705 bool has_frame_data = false; | |
706 | |
707 if (status != noErr) { | |
708 DLOG(ERROR) << " encoding failed: " << status; | |
709 encoder->cast_environment_->PostTask( | |
710 CastEnvironment::MAIN, FROM_HERE, | |
711 base::Bind(encoder->status_change_cb_, STATUS_CODEC_RUNTIME_ERROR)); | |
712 } else if ((info & VideoToolboxGlue::kVTEncodeInfo_FrameDropped)) { | |
713 DVLOG(2) << " frame dropped"; | |
714 } else { | |
715 auto sample_attachments = | |
716 static_cast<CFDictionaryRef>(CFArrayGetValueAtIndex( | |
717 CoreMediaGlue::CMSampleBufferGetSampleAttachmentsArray(sbuf, true), | |
718 0)); | |
719 | |
720 // If the NotSync key is not present, it implies Sync, which indicates a | |
721 // keyframe (at least I think, VT documentation is, erm, sparse). Could | |
722 // alternatively use kCMSampleAttachmentKey_DependsOnOthers == false. | |
723 keyframe = !CFDictionaryContainsKey( | |
724 sample_attachments, | |
725 CoreMediaGlue::kCMSampleAttachmentKey_NotSync()); | |
726 has_frame_data = true; | |
727 } | |
728 | |
729 // Increment the encoder-scoped frame id and assign the new value to this | |
730 // frame. VideoToolbox calls the output callback serially, so this is safe. | |
731 const uint32_t frame_id = ++encoder->last_frame_id_; | |
732 | |
733 scoped_ptr<SenderEncodedFrame> encoded_frame(new SenderEncodedFrame()); | |
734 encoded_frame->frame_id = frame_id; | |
735 encoded_frame->reference_time = request->reference_time; | |
736 encoded_frame->rtp_timestamp = request->rtp_timestamp; | |
737 if (keyframe) { | |
738 encoded_frame->dependency = EncodedFrame::KEY; | |
739 encoded_frame->referenced_frame_id = frame_id; | |
740 } else { | |
741 encoded_frame->dependency = EncodedFrame::DEPENDENT; | |
742 // H.264 supports complex frame reference schemes (multiple reference | |
743 // frames, slice references, backward and forward references, etc). Cast | |
744 // doesn't support the concept of forward-referencing frame dependencies or | |
745 // multiple frame dependencies; so pretend that all frames are only | |
746 // decodable after their immediately preceding frame is decoded. This will | |
747 // ensure a Cast receiver only attempts to decode the frames sequentially | |
748 // and in order. Furthermore, the encoder is configured to never use forward | |
749 // references (see |kVTCompressionPropertyKey_AllowFrameReordering|). There | |
750 // is no way to prevent multiple reference frames. | |
751 encoded_frame->referenced_frame_id = frame_id - 1; | |
752 } | |
753 | |
754 if (has_frame_data) | |
755 CopySampleBufferToAnnexBBuffer(sbuf, &encoded_frame->data, keyframe); | |
756 | |
757 // TODO(miu): Compute and populate the |deadline_utilization| and | |
758 // |lossy_utilization| performance metrics in |encoded_frame|. | |
759 | |
760 encoded_frame->encode_completion_time = | |
761 encoder->cast_environment_->Clock()->NowTicks(); | |
762 encoder->cast_environment_->PostTask( | |
763 CastEnvironment::MAIN, FROM_HERE, | |
764 base::Bind(request->frame_encoded_callback, | |
765 base::Passed(&encoded_frame))); | |
766 } | |
767 | |
768 } // namespace cast | |
769 } // namespace media | |
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