OLD | NEW |
---|---|
(Empty) | |
1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "webkit/media/crypto/ppapi/ffmpeg_cdm_video_decoder.h" | |
6 | |
7 #include "base/logging.h" | |
8 #include "base/memory/scoped_ptr.h" | |
9 #include "media/base/buffers.h" | |
10 #include "media/base/limits.h" | |
11 #include "media/ffmpeg/ffmpeg_common.h" | |
12 #include "webkit/media/crypto/ppapi/content_decryption_module.h" | |
13 #include "webkit/media/crypto/ppapi/ffmpeg_cdm_video_frame.h" | |
14 | |
15 // Include FFmpeg header files. | |
16 extern "C" { | |
17 // Temporarily disable possible loss of data warning. | |
18 MSVC_PUSH_DISABLE_WARNING(4244); | |
19 #include <libavcodec/avcodec.h> | |
20 MSVC_POP_WARNING(); | |
21 } // extern "C" | |
22 | |
23 namespace webkit_media { | |
24 | |
25 namespace { | |
26 | |
27 cdm::VideoFormat PixelFormatToCdmVideoFormat(PixelFormat pixel_format) { | |
28 switch (pixel_format) { | |
29 case PIX_FMT_YUV420P: | |
30 return cdm::kYv12; | |
31 default: | |
32 DVLOG(1) << "Unsupported PixelFormat: " << pixel_format; | |
33 } | |
34 return cdm::kUnknownVideoFormat; | |
35 } | |
36 | |
37 PixelFormat CdmVideoFormatToPixelFormat(cdm::VideoFormat video_format) { | |
38 switch (video_format) { | |
39 case cdm::kYv12: | |
40 case cdm::kI420: | |
41 return PIX_FMT_YUV420P; | |
42 case cdm::kUnknownVideoFormat: | |
43 default: | |
44 DVLOG(1) << "Unsupported cdm::VideoFormat: " << video_format; | |
45 } | |
46 return PIX_FMT_NONE; | |
47 } | |
48 | |
49 CodecID CdmVideoCodecToCodecID( | |
50 cdm::VideoDecoderConfig::VideoCodec video_codec) { | |
51 switch (video_codec) { | |
52 case cdm::VideoDecoderConfig::kCodecVP8: | |
53 return CODEC_ID_VP8; | |
54 case cdm::kUnknownVideoFormat: | |
55 default: | |
56 DVLOG(1) << "Unsupported cdm::VideoCodec: " << video_codec; | |
57 } | |
58 NOTREACHED() << "Unsupported video_codec: " << video_codec; | |
59 return CODEC_ID_NONE; | |
60 } | |
61 | |
62 void CdmVideoDecoderConfigToAVCodecContext( | |
63 const cdm::VideoDecoderConfig& config, | |
64 AVCodecContext* codec_context) { | |
65 codec_context->codec_type = AVMEDIA_TYPE_VIDEO; | |
66 codec_context->codec_id = CdmVideoCodecToCodecID(config.codec); | |
67 codec_context->profile = FF_PROFILE_UNKNOWN; | |
68 codec_context->coded_width = config.coded_size.width; | |
69 codec_context->coded_height = config.coded_size.height; | |
70 codec_context->pix_fmt = CdmVideoFormatToPixelFormat(config.format); | |
71 | |
72 if (config.extra_data) { | |
73 codec_context->extradata_size = config.extra_data_size; | |
74 codec_context->extradata = reinterpret_cast<uint8_t*>( | |
75 av_malloc(config.extra_data_size + FF_INPUT_BUFFER_PADDING_SIZE)); | |
76 memcpy(codec_context->extradata, config.extra_data, | |
77 config.extra_data_size); | |
78 memset(codec_context->extradata + config.extra_data_size, '\0', | |
79 FF_INPUT_BUFFER_PADDING_SIZE); | |
80 } else { | |
81 codec_context->extradata = NULL; | |
82 codec_context->extradata_size = 0; | |
83 } | |
84 | |
85 } | |
86 | |
87 cdm::VideoFrame::VideoPlane VideoPlane(int32_t plane_index) { | |
88 DCHECK(plane_index >= cdm::VideoFrame::kYPlane && | |
89 plane_index < cdm::VideoFrame::kMaxPlanes); | |
90 return static_cast<cdm::VideoFrame::VideoPlane>(plane_index); | |
91 } | |
92 | |
93 uint8_t* PlanePointer(FFmpegCdmVideoFrame* frame, int plane_index) { | |
94 DCHECK(frame); | |
95 return frame->frame_buffer()->data() + | |
96 frame->plane_offset(VideoPlane(plane_index)); | |
97 } | |
98 | |
99 } // namespace | |
100 | |
101 int GetCdmVideoBufferImpl(AVCodecContext* s, AVFrame* frame) { | |
ddorwin
2012/10/17 03:18:20
"s" is a bad name. Is that consistent with somethi
Tom Finegan
2012/10/17 04:25:29
From media. Renamed args.
| |
102 DVLOG(3) << "GetCdmVideoBufferImpl()"; | |
103 FFmpegCdmVideoDecoder* vd = static_cast<FFmpegCdmVideoDecoder*>(s->opaque); | |
104 return vd->GetVideoBuffer(s, frame); | |
105 } | |
106 | |
107 static void ReleaseCdmVideoBufferImpl(AVCodecContext* s, AVFrame* frame) { | |
108 DVLOG(3) << "ReleaseCdmVideoBufferImpl()"; | |
109 | |
110 scoped_ptr<FFmpegCdmVideoFrame> cdm_video_frame( | |
111 reinterpret_cast<FFmpegCdmVideoFrame*>(frame->opaque)); | |
112 | |
113 // The FFmpeg API expects us to zero the data pointers in this callback. | |
114 memset(frame->data, 0, sizeof(frame->data)); | |
115 frame->opaque = NULL; | |
116 } | |
117 | |
118 FFmpegCdmVideoDecoder::FFmpegCdmVideoDecoder(cdm::Allocator* allocator) | |
119 : codec_context_(NULL), | |
120 av_frame_(NULL), | |
121 is_initialized_(false), | |
122 allocator_(allocator) { | |
123 } | |
124 | |
125 FFmpegCdmVideoDecoder::~FFmpegCdmVideoDecoder() { | |
126 ReleaseFFmpegResources(); | |
127 } | |
128 | |
129 bool FFmpegCdmVideoDecoder::Initialize(const cdm::VideoDecoderConfig& config) { | |
130 DVLOG(1) << "Initialize()"; | |
131 | |
132 if (is_initialized_) { | |
133 DLOG(ERROR) << "Already initialized."; | |
134 return false; | |
135 } | |
136 | |
137 if (!FFmpegCdmVideoFrame::IsValidConfig(config.format, config.coded_size)) { | |
138 DLOG(ERROR) << "Invalid VideoDecoderConfig."; | |
139 return false; | |
140 } | |
141 | |
142 av_register_all(); | |
143 | |
144 // Release existing resources if necessary. | |
145 ReleaseFFmpegResources(); | |
146 | |
147 // Initialize AVCodecContext structure. | |
148 codec_context_ = avcodec_alloc_context3(NULL); | |
149 CdmVideoDecoderConfigToAVCodecContext(config, codec_context_); | |
150 | |
151 // Enable motion vector search (potentially slow), strong deblocking filter | |
152 // for damaged macroblocks, and set our error detection sensitivity. | |
153 codec_context_->error_concealment = FF_EC_GUESS_MVS | FF_EC_DEBLOCK; | |
154 codec_context_->err_recognition = AV_EF_CAREFUL; | |
155 codec_context_->thread_count = kDecodeThreads; | |
156 codec_context_->opaque = this; | |
157 codec_context_->flags |= CODEC_FLAG_EMU_EDGE; | |
158 codec_context_->get_buffer = GetCdmVideoBufferImpl; | |
159 codec_context_->release_buffer = ReleaseCdmVideoBufferImpl; | |
160 DCHECK_EQ(CODEC_ID_VP8, codec_context_->codec_id); | |
161 | |
162 AVCodec* codec = avcodec_find_decoder(codec_context_->codec_id); | |
163 if (!codec) { | |
164 LOG(ERROR) << "avcodec_find_decoder failed."; | |
165 return false; | |
166 } | |
167 | |
168 int status; | |
169 if ((status = avcodec_open2(codec_context_, codec, NULL)) < 0) { | |
170 LOG(ERROR) << "avcodec_open2 failed: " << status; | |
171 return false; | |
172 } | |
173 | |
174 av_frame_ = avcodec_alloc_frame(); | |
175 config_ = config; | |
176 | |
177 // TODO(tomfinegan): Do we need to copy the extra data? Zeroing the members | |
178 // because we don't own the memory. | |
179 config_.extra_data = NULL; | |
180 config_.extra_data_size = 0; | |
181 | |
182 is_initialized_ = true; | |
183 | |
184 return true; | |
185 } | |
186 | |
187 void FFmpegCdmVideoDecoder::Deinitialize() { | |
188 DVLOG(1) << "Deinitialize()"; | |
189 ReleaseFFmpegResources(); | |
190 } | |
191 | |
192 void FFmpegCdmVideoDecoder::Reset() { | |
193 DVLOG(1) << "Reset()"; | |
194 avcodec_flush_buffers(codec_context_); | |
195 } | |
196 | |
197 cdm::Status FFmpegCdmVideoDecoder::DecodeFrame( | |
198 const uint8_t* compressed_frame, | |
199 int32_t compressed_frame_size, | |
200 int64_t timestamp, | |
201 cdm::VideoFrame* decoded_frame) { | |
202 DVLOG(1) << "DecodeFrame()"; | |
203 DCHECK(decoded_frame); | |
204 | |
205 // Create a packet for input data. | |
206 AVPacket packet; | |
207 av_init_packet(&packet); | |
208 | |
209 // The FFmpeg API changes does not allow us to have const read-only pointers. | |
210 packet.data = const_cast<uint8_t*>(compressed_frame); | |
211 packet.size = compressed_frame_size; | |
212 | |
213 // Let FFmpeg handle presentation timestamp reordering. | |
214 codec_context_->reordered_opaque = timestamp; | |
215 | |
216 // Reset frame to default values. | |
217 avcodec_get_frame_defaults(av_frame_); | |
218 | |
219 // This is for codecs not using get_buffer to initialize | |
220 // |av_frame_->reordered_opaque| | |
221 av_frame_->reordered_opaque = codec_context_->reordered_opaque; | |
222 | |
223 int frame_decoded = 0; | |
224 int result = avcodec_decode_video2(codec_context_, | |
225 av_frame_, | |
226 &frame_decoded, | |
227 &packet); | |
228 // Log the problem when we can't decode a video frame and exit early. | |
229 if (result < 0) { | |
230 LOG(ERROR) << "DecodeFrame: Error decoding a video frame with timestamp: " | |
231 << timestamp << " us, packet size: " << packet.size << " bytes"; | |
232 return cdm::kDecodeError; | |
233 } | |
234 | |
235 // If no frame was produced then signal that more data is required to | |
236 // produce more frames. This can happen under two circumstances: | |
237 // 1) Decoder was recently initialized/flushed | |
238 // 2) End of stream was reached and all internal frames have been output | |
239 if (frame_decoded == 0) | |
240 return cdm::kNeedMoreData; | |
241 | |
242 // The decoder is in a bad state and not decoding correctly. | |
243 // Checking for NULL avoids a crash. | |
244 if (!av_frame_->data[cdm::VideoFrame::kYPlane] || | |
245 !av_frame_->data[cdm::VideoFrame::kUPlane] || | |
246 !av_frame_->data[cdm::VideoFrame::kVPlane]) { | |
247 LOG(ERROR) << "Video frame was produced yet has invalid frame data."; | |
248 return cdm::kDecodeError; | |
249 } | |
250 | |
251 if (!av_frame_->opaque) { | |
252 LOG(ERROR) << "FFmpegCdmVideoFrame object associated with frame missing."; | |
253 return cdm::kDecodeError; | |
254 } | |
255 | |
256 scoped_ptr<FFmpegCdmVideoFrame> video_frame( | |
257 static_cast<FFmpegCdmVideoFrame*>(av_frame_->opaque)); | |
258 DCHECK(video_frame->frame_buffer()); | |
259 video_frame->MoveVideoFrame(decoded_frame); | |
260 return cdm::kSuccess; | |
261 } | |
262 | |
263 int FFmpegCdmVideoDecoder::GetVideoBuffer(AVCodecContext* codec_context, | |
264 AVFrame* av_frame) { | |
265 DVLOG(3) << "GetVideoBuffer()"; | |
266 | |
267 // Don't use |codec_context_| here! With threaded decoding, | |
268 // it will contain unsynchronized width/height/pix_fmt values, | |
269 // whereas |codec_context| contains the current threads's | |
270 // updated width/height/pix_fmt, which can change for adaptive | |
271 // content. | |
272 cdm::VideoFormat format = | |
273 PixelFormatToCdmVideoFormat(codec_context->pix_fmt); | |
274 if (format == cdm::kUnknownVideoFormat) | |
275 return AVERROR(EINVAL); | |
276 DCHECK(format == cdm::kYv12 || format == cdm::kI420); | |
277 | |
278 cdm::Size size(codec_context->width, codec_context->height); | |
279 int ret; | |
280 if ((ret = av_image_check_size(size.width, size.height, 0, NULL)) < 0) | |
281 return ret; | |
282 | |
283 if (!FFmpegCdmVideoFrame::IsValidConfig(format, size)) | |
284 return AVERROR(EINVAL); | |
285 | |
286 FFmpegCdmVideoFrame* video_frame = FFmpegCdmVideoFrame::Create(allocator_, | |
287 format, | |
288 size); | |
289 if (!video_frame) { | |
290 LOG(ERROR) << "GetVideoBuffer: VideoFrame Create failed"; | |
291 return AVERROR(ENOMEM); | |
292 } | |
293 | |
294 for (int i = 0; i < cdm::VideoFrame::kMaxPlanes; ++i) { | |
295 av_frame->base[i] = PlanePointer(video_frame, i); | |
296 av_frame->data[i] = PlanePointer(video_frame, i); | |
297 av_frame->linesize[i] = video_frame->stride(VideoPlane(i)); | |
298 } | |
299 | |
300 av_frame->opaque = reinterpret_cast<void*>(video_frame); | |
301 av_frame->type = FF_BUFFER_TYPE_USER; | |
302 av_frame->pkt_pts = codec_context->pkt ? codec_context->pkt->pts : | |
303 AV_NOPTS_VALUE; | |
304 av_frame->width = codec_context->width; | |
305 av_frame->height = codec_context->height; | |
306 av_frame->format = codec_context->pix_fmt; | |
307 | |
308 return 0; | |
309 } | |
310 | |
311 void FFmpegCdmVideoDecoder::ReleaseFFmpegResources() { | |
312 DVLOG(1) << "ReleaseFFmpegResources()"; | |
313 | |
314 if (codec_context_) { | |
315 av_free(codec_context_->extradata); | |
316 avcodec_close(codec_context_); | |
317 av_free(codec_context_); | |
318 codec_context_ = NULL; | |
319 } | |
320 if (av_frame_) { | |
321 av_free(av_frame_); | |
322 av_frame_ = NULL; | |
323 } | |
324 | |
325 is_initialized_ = false; | |
326 } | |
327 | |
328 } // namespace webkit_media | |
OLD | NEW |