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
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "webkit/media/crypto/ppapi/ffmpeg_cdm_video_decoder.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "media/base/buffers.h"
#include "media/base/limits.h"
#include "webkit/media/crypto/ppapi/cdm/content_decryption_module.h"
// Include FFmpeg header files.
extern "C" {
// Temporarily disable possible loss of data warning.
MSVC_PUSH_DISABLE_WARNING(4244);
#include <libavcodec/avcodec.h>
MSVC_POP_WARNING();
} // extern "C"
namespace webkit_media {
static const int kDecodeThreads = 1;
static cdm::VideoFormat PixelFormatToCdmVideoFormat(PixelFormat pixel_format) {
switch (pixel_format) {
case PIX_FMT_YUV420P:
return cdm::kYv12;
default:
DVLOG(1) << "Unsupported PixelFormat: " << pixel_format;
}
return cdm::kUnknownVideoFormat;
}
static PixelFormat CdmVideoFormatToPixelFormat(cdm::VideoFormat video_format) {
switch (video_format) {
case cdm::kYv12:
case cdm::kI420:
return PIX_FMT_YUV420P;
case cdm::kUnknownVideoFormat:
default:
DVLOG(1) << "Unsupported cdm::VideoFormat: " << video_format;
}
return PIX_FMT_NONE;
}
static CodecID CdmVideoCodecToCodecID(
cdm::VideoDecoderConfig::VideoCodec video_codec) {
switch (video_codec) {
case cdm::VideoDecoderConfig::kCodecVp8:
return CODEC_ID_VP8;
case cdm::VideoDecoderConfig::kCodecH264:
return CODEC_ID_H264;
case cdm::VideoDecoderConfig::kUnknownVideoCodec:
default:
NOTREACHED() << "Unsupported cdm::VideoCodec: " << video_codec;
return CODEC_ID_NONE;
}
}
static int CdmVideoCodecProfileToProfileID(
cdm::VideoDecoderConfig::VideoCodecProfile profile) {
switch (profile) {
case cdm::VideoDecoderConfig::kVp8ProfileMain:
return FF_PROFILE_UNKNOWN; // VP8 does not define an FFmpeg profile.
case cdm::VideoDecoderConfig::kH264ProfileBaseline:
return FF_PROFILE_H264_BASELINE;
case cdm::VideoDecoderConfig::kH264ProfileMain:
return FF_PROFILE_H264_MAIN;
case cdm::VideoDecoderConfig::kH264ProfileExtended:
return FF_PROFILE_H264_EXTENDED;
case cdm::VideoDecoderConfig::kH264ProfileHigh:
return FF_PROFILE_H264_HIGH;
case cdm::VideoDecoderConfig::kH264ProfileHigh10:
return FF_PROFILE_H264_HIGH_10;
case cdm::VideoDecoderConfig::kH264ProfileHigh422:
return FF_PROFILE_H264_HIGH_422;
case cdm::VideoDecoderConfig::kH264ProfileHigh444Predictive:
return FF_PROFILE_H264_HIGH_444_PREDICTIVE;
case cdm::VideoDecoderConfig::kUnknownVideoCodecProfile:
default:
NOTREACHED() << "Unknown cdm::VideoCodecProfile: " << profile;
return FF_PROFILE_UNKNOWN;
}
}
static void CdmVideoDecoderConfigToAVCodecContext(
const cdm::VideoDecoderConfig& config,
AVCodecContext* codec_context) {
codec_context->codec_type = AVMEDIA_TYPE_VIDEO;
codec_context->codec_id = CdmVideoCodecToCodecID(config.codec);
codec_context->profile = CdmVideoCodecProfileToProfileID(config.profile);
codec_context->coded_width = config.coded_size.width;
codec_context->coded_height = config.coded_size.height;
codec_context->pix_fmt = CdmVideoFormatToPixelFormat(config.format);
if (config.extra_data) {
codec_context->extradata_size = config.extra_data_size;
codec_context->extradata = reinterpret_cast<uint8_t*>(
av_malloc(config.extra_data_size + FF_INPUT_BUFFER_PADDING_SIZE));
memcpy(codec_context->extradata, config.extra_data,
config.extra_data_size);
memset(codec_context->extradata + config.extra_data_size, 0,
FF_INPUT_BUFFER_PADDING_SIZE);
} else {
codec_context->extradata = NULL;
codec_context->extradata_size = 0;
}
}
static void CopyPlane(const uint8_t* source,
int32_t source_stride,
int32_t target_stride,
int32_t rows,
int32_t copy_bytes_per_row,
uint8_t* target) {
DCHECK(source);
DCHECK(target);
DCHECK_LE(copy_bytes_per_row, source_stride);
DCHECK_LE(copy_bytes_per_row, target_stride);
for (int i = 0; i < rows; ++i) {
const int source_offset = i * source_stride;
const int target_offset = i * target_stride;
memcpy(target + target_offset,
source + source_offset,
copy_bytes_per_row);
}
}
FFmpegCdmVideoDecoder::FFmpegCdmVideoDecoder(cdm::Host* host)
: codec_context_(NULL),
av_frame_(NULL),
is_initialized_(false),
host_(host) {
}
FFmpegCdmVideoDecoder::~FFmpegCdmVideoDecoder() {
ReleaseFFmpegResources();
}
bool FFmpegCdmVideoDecoder::Initialize(const cdm::VideoDecoderConfig& config) {
DVLOG(1) << "Initialize()";
if (!IsValidOutputConfig(config.format, config.coded_size)) {
LOG(ERROR) << "Initialize(): invalid video decoder configuration.";
return false;
}
if (is_initialized_) {
LOG(ERROR) << "Initialize(): Already initialized.";
return false;
}
// Initialize AVCodecContext structure.
codec_context_ = avcodec_alloc_context3(NULL);
CdmVideoDecoderConfigToAVCodecContext(config, codec_context_);
// Enable motion vector search (potentially slow), strong deblocking filter
// for damaged macroblocks, and set our error detection sensitivity.
codec_context_->error_concealment = FF_EC_GUESS_MVS | FF_EC_DEBLOCK;
codec_context_->err_recognition = AV_EF_CAREFUL;
codec_context_->thread_count = kDecodeThreads;
codec_context_->opaque = this;
codec_context_->flags |= CODEC_FLAG_EMU_EDGE;
AVCodec* codec = avcodec_find_decoder(codec_context_->codec_id);
if (!codec) {
LOG(ERROR) << "Initialize(): avcodec_find_decoder failed.";
return false;
}
int status;
if ((status = avcodec_open2(codec_context_, codec, NULL)) < 0) {
LOG(ERROR) << "Initialize(): avcodec_open2 failed: " << status;
return false;
}
av_frame_ = avcodec_alloc_frame();
is_initialized_ = true;
return true;
}
void FFmpegCdmVideoDecoder::Deinitialize() {
DVLOG(1) << "Deinitialize()";
ReleaseFFmpegResources();
is_initialized_ = false;
}
void FFmpegCdmVideoDecoder::Reset() {
DVLOG(1) << "Reset()";
avcodec_flush_buffers(codec_context_);
}
// static
bool FFmpegCdmVideoDecoder::IsValidOutputConfig(cdm::VideoFormat format,
const cdm::Size& data_size) {
return ((format == cdm::kYv12 || format == cdm::kI420) &&
(data_size.width % 2) == 0 && (data_size.height % 2) == 0 &&
data_size.width > 0 && data_size.height > 0 &&
data_size.width <= media::limits::kMaxDimension &&
data_size.height <= media::limits::kMaxDimension &&
data_size.width * data_size.height <= media::limits::kMaxCanvas);
}
cdm::Status FFmpegCdmVideoDecoder::DecodeFrame(
const uint8_t* compressed_frame,
int32_t compressed_frame_size,
int64_t timestamp,
cdm::VideoFrame* decoded_frame) {
DVLOG(1) << "DecodeFrame()";
DCHECK(decoded_frame);
// Create a packet for input data.
AVPacket packet;
av_init_packet(&packet);
// The FFmpeg API does not allow us to have const read-only pointers.
packet.data = const_cast<uint8_t*>(compressed_frame);
packet.size = compressed_frame_size;
// Let FFmpeg handle presentation timestamp reordering.
codec_context_->reordered_opaque = timestamp;
// Reset frame to default values.
avcodec_get_frame_defaults(av_frame_);
// This is for codecs not using get_buffer to initialize
// |av_frame_->reordered_opaque|
av_frame_->reordered_opaque = codec_context_->reordered_opaque;
int frame_decoded = 0;
int result = avcodec_decode_video2(codec_context_,
av_frame_,
&frame_decoded,
&packet);
// Log the problem when we can't decode a video frame and exit early.
if (result < 0) {
LOG(ERROR) << "DecodeFrame(): Error decoding video frame with timestamp: "
<< timestamp << " us, packet size: " << packet.size << " bytes";
return cdm::kDecodeError;
}
// If no frame was produced then signal that more data is required to produce
// more frames.
if (frame_decoded == 0)
return cdm::kNeedMoreData;
// The decoder is in a bad state and not decoding correctly.
// Checking for NULL avoids a crash.
if (!av_frame_->data[cdm::VideoFrame::kYPlane] ||
!av_frame_->data[cdm::VideoFrame::kUPlane] ||
!av_frame_->data[cdm::VideoFrame::kVPlane]) {
LOG(ERROR) << "DecodeFrame(): Video frame has invalid frame data.";
return cdm::kDecodeError;
}
if (!CopyAvFrameTo(decoded_frame)) {
LOG(ERROR) << "DecodeFrame() could not copy video frame to output buffer.";
return cdm::kDecodeError;
}
return cdm::kSuccess;
}
bool FFmpegCdmVideoDecoder::CopyAvFrameTo(cdm::VideoFrame* cdm_video_frame) {
DCHECK(cdm_video_frame);
DCHECK_EQ(av_frame_->format, PIX_FMT_YUV420P);
DCHECK_EQ(av_frame_->width % 2, 0);
DCHECK_EQ(av_frame_->height % 2, 0);
const int y_size = av_frame_->width * av_frame_->height;
const int uv_size = y_size / 2;
const int space_required = y_size + (uv_size * 2);
DCHECK(!cdm_video_frame->FrameBuffer());
cdm_video_frame->SetFrameBuffer(host_->Allocate(space_required));
if (!cdm_video_frame->FrameBuffer()) {
LOG(ERROR) << "CopyAvFrameTo() cdm::Host::Allocate failed.";
return false;
}
cdm_video_frame->FrameBuffer()->SetSize(space_required);
CopyPlane(av_frame_->base[cdm::VideoFrame::kYPlane],
av_frame_->linesize[cdm::VideoFrame::kYPlane],
av_frame_->width,
av_frame_->height,
av_frame_->width,
cdm_video_frame->FrameBuffer()->Data());
const int uv_stride = av_frame_->width / 2;
const int uv_rows = av_frame_->height / 2;
CopyPlane(av_frame_->base[cdm::VideoFrame::kUPlane],
av_frame_->linesize[cdm::VideoFrame::kUPlane],
uv_stride,
uv_rows,
uv_stride,
cdm_video_frame->FrameBuffer()->Data() + y_size);
CopyPlane(av_frame_->base[cdm::VideoFrame::kVPlane],
av_frame_->linesize[cdm::VideoFrame::kVPlane],
uv_stride,
uv_rows,
uv_stride,
cdm_video_frame->FrameBuffer()->Data() + y_size + uv_size);
PixelFormat format = static_cast<PixelFormat>(av_frame_->format);
cdm_video_frame->SetFormat(PixelFormatToCdmVideoFormat(format));
cdm::Size video_frame_size;
video_frame_size.width = av_frame_->width;
video_frame_size.height = av_frame_->height;
cdm_video_frame->SetSize(video_frame_size);
cdm_video_frame->SetPlaneOffset(cdm::VideoFrame::kYPlane, 0);
cdm_video_frame->SetPlaneOffset(cdm::VideoFrame::kUPlane, y_size);
cdm_video_frame->SetPlaneOffset(cdm::VideoFrame::kVPlane,
y_size + uv_size);
cdm_video_frame->SetStride(cdm::VideoFrame::kYPlane, av_frame_->width);
cdm_video_frame->SetStride(cdm::VideoFrame::kUPlane, uv_stride);
cdm_video_frame->SetStride(cdm::VideoFrame::kVPlane, uv_stride);
cdm_video_frame->SetTimestamp(av_frame_->reordered_opaque);
return true;
}
void FFmpegCdmVideoDecoder::ReleaseFFmpegResources() {
DVLOG(1) << "ReleaseFFmpegResources()";
if (codec_context_) {
av_free(codec_context_->extradata);
avcodec_close(codec_context_);
av_free(codec_context_);
codec_context_ = NULL;
}
if (av_frame_) {
av_free(av_frame_);
av_frame_ = NULL;
}
}
} // namespace webkit_media
|