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
|
// 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 "media/base/stream_parser_buffer.h"
#include "base/logging.h"
#include "media/base/buffers.h"
namespace media {
static scoped_refptr<StreamParserBuffer> CopyBuffer(
const StreamParserBuffer& buffer) {
if (buffer.end_of_stream())
return StreamParserBuffer::CreateEOSBuffer();
scoped_refptr<StreamParserBuffer> copied_buffer =
StreamParserBuffer::CopyFrom(buffer.data(),
buffer.data_size(),
buffer.side_data(),
buffer.side_data_size(),
buffer.IsKeyframe(),
buffer.type(),
buffer.track_id());
copied_buffer->SetDecodeTimestamp(buffer.GetDecodeTimestamp());
copied_buffer->SetConfigId(buffer.GetConfigId());
copied_buffer->set_timestamp(buffer.timestamp());
copied_buffer->set_duration(buffer.duration());
copied_buffer->set_discard_padding(buffer.discard_padding());
copied_buffer->set_splice_timestamp(buffer.splice_timestamp());
const DecryptConfig* decrypt_config = buffer.decrypt_config();
if (decrypt_config) {
copied_buffer->set_decrypt_config(
make_scoped_ptr(new DecryptConfig(decrypt_config->key_id(),
decrypt_config->iv(),
decrypt_config->subsamples())));
}
return copied_buffer;
}
scoped_refptr<StreamParserBuffer> StreamParserBuffer::CreateEOSBuffer() {
return make_scoped_refptr(new StreamParserBuffer(NULL, 0, NULL, 0, false,
DemuxerStream::UNKNOWN, 0));
}
scoped_refptr<StreamParserBuffer> StreamParserBuffer::CopyFrom(
const uint8* data, int data_size, bool is_keyframe, Type type,
TrackId track_id) {
return make_scoped_refptr(
new StreamParserBuffer(data, data_size, NULL, 0, is_keyframe, type,
track_id));
}
scoped_refptr<StreamParserBuffer> StreamParserBuffer::CopyFrom(
const uint8* data, int data_size,
const uint8* side_data, int side_data_size,
bool is_keyframe, Type type, TrackId track_id) {
return make_scoped_refptr(
new StreamParserBuffer(data, data_size, side_data, side_data_size,
is_keyframe, type, track_id));
}
DecodeTimestamp StreamParserBuffer::GetDecodeTimestamp() const {
if (decode_timestamp_ == kNoDecodeTimestamp())
return DecodeTimestamp::FromPresentationTime(timestamp());
return decode_timestamp_;
}
void StreamParserBuffer::SetDecodeTimestamp(DecodeTimestamp timestamp) {
decode_timestamp_ = timestamp;
if (preroll_buffer_.get())
preroll_buffer_->SetDecodeTimestamp(timestamp);
}
StreamParserBuffer::StreamParserBuffer(const uint8* data, int data_size,
const uint8* side_data,
int side_data_size, bool is_keyframe,
Type type, TrackId track_id)
: DecoderBuffer(data, data_size, side_data, side_data_size),
is_keyframe_(is_keyframe),
decode_timestamp_(kNoDecodeTimestamp()),
config_id_(kInvalidConfigId),
type_(type),
track_id_(track_id) {
// TODO(scherkus): Should DataBuffer constructor accept a timestamp and
// duration to force clients to set them? Today they end up being zero which
// is both a common and valid value and could lead to bugs.
if (data) {
set_duration(kNoTimestamp());
}
}
StreamParserBuffer::~StreamParserBuffer() {}
int StreamParserBuffer::GetConfigId() const {
return config_id_;
}
void StreamParserBuffer::SetConfigId(int config_id) {
config_id_ = config_id;
if (preroll_buffer_.get())
preroll_buffer_->SetConfigId(config_id);
}
int StreamParserBuffer::GetSpliceBufferConfigId(size_t index) const {
return index < splice_buffers().size()
? splice_buffers_[index]->GetConfigId()
: GetConfigId();
}
void StreamParserBuffer::ConvertToSpliceBuffer(
const BufferQueue& pre_splice_buffers) {
DCHECK(splice_buffers_.empty());
DCHECK(duration() > base::TimeDelta())
<< "Only buffers with a valid duration can convert to a splice buffer."
<< " pts " << timestamp().InSecondsF()
<< " dts " << GetDecodeTimestamp().InSecondsF()
<< " dur " << duration().InSecondsF();
DCHECK(!end_of_stream());
// Make a copy of this first, before making any changes.
scoped_refptr<StreamParserBuffer> overlapping_buffer = CopyBuffer(*this);
overlapping_buffer->set_splice_timestamp(kNoTimestamp());
const scoped_refptr<StreamParserBuffer>& first_splice_buffer =
pre_splice_buffers.front();
// Ensure the given buffers are actually before the splice point.
DCHECK(first_splice_buffer->timestamp() <= overlapping_buffer->timestamp());
// TODO(dalecurtis): We should also clear |data| and |side_data|, but since
// that implies EOS care must be taken to ensure there are no clients relying
// on that behavior.
// Move over any preroll from this buffer.
if (preroll_buffer_.get()) {
DCHECK(!overlapping_buffer->preroll_buffer_.get());
overlapping_buffer->preroll_buffer_.swap(preroll_buffer_);
}
// Rewrite |this| buffer as a splice buffer.
SetDecodeTimestamp(first_splice_buffer->GetDecodeTimestamp());
SetConfigId(first_splice_buffer->GetConfigId());
set_timestamp(first_splice_buffer->timestamp());
is_keyframe_ = first_splice_buffer->IsKeyframe();
type_ = first_splice_buffer->type();
track_id_ = first_splice_buffer->track_id();
set_splice_timestamp(overlapping_buffer->timestamp());
// The splice duration is the duration of all buffers before the splice plus
// the highest ending timestamp after the splice point.
DCHECK(overlapping_buffer->duration() > base::TimeDelta());
DCHECK(pre_splice_buffers.back()->duration() > base::TimeDelta());
set_duration(
std::max(overlapping_buffer->timestamp() + overlapping_buffer->duration(),
pre_splice_buffers.back()->timestamp() +
pre_splice_buffers.back()->duration()) -
first_splice_buffer->timestamp());
// Copy all pre splice buffers into our wrapper buffer.
for (BufferQueue::const_iterator it = pre_splice_buffers.begin();
it != pre_splice_buffers.end();
++it) {
const scoped_refptr<StreamParserBuffer>& buffer = *it;
DCHECK(!buffer->end_of_stream());
DCHECK(!buffer->preroll_buffer().get());
DCHECK(buffer->splice_buffers().empty());
splice_buffers_.push_back(CopyBuffer(*buffer.get()));
splice_buffers_.back()->set_splice_timestamp(splice_timestamp());
}
splice_buffers_.push_back(overlapping_buffer);
}
void StreamParserBuffer::SetPrerollBuffer(
const scoped_refptr<StreamParserBuffer>& preroll_buffer) {
DCHECK(!preroll_buffer_.get());
DCHECK(!end_of_stream());
DCHECK(!preroll_buffer->end_of_stream());
DCHECK(!preroll_buffer->preroll_buffer_.get());
DCHECK(preroll_buffer->splice_timestamp() == kNoTimestamp());
DCHECK(preroll_buffer->splice_buffers().empty());
DCHECK(preroll_buffer->timestamp() <= timestamp());
DCHECK(preroll_buffer->discard_padding() == DecoderBuffer::DiscardPadding());
DCHECK_EQ(preroll_buffer->type(), type());
DCHECK_EQ(preroll_buffer->track_id(), track_id());
preroll_buffer_ = preroll_buffer;
preroll_buffer_->set_timestamp(timestamp());
preroll_buffer_->SetDecodeTimestamp(GetDecodeTimestamp());
// Mark the entire buffer for discard.
preroll_buffer_->set_discard_padding(
std::make_pair(kInfiniteDuration(), base::TimeDelta()));
}
void StreamParserBuffer::set_timestamp(base::TimeDelta timestamp) {
DecoderBuffer::set_timestamp(timestamp);
if (preroll_buffer_.get())
preroll_buffer_->set_timestamp(timestamp);
}
} // namespace media
|
