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
|
#include "main.h"
#include "VideoThread.h"
#include "../Winamp/wa_ipc.h"
VideoSample *video_sample=0;
IVideoOutput *videoOutput=0;
static bool video_reopen=false;
static int height=0;
static int width=0;
static bool video_opened=false;
static int consecutive_early_frames;
HANDLE video_flush = 0, video_start_flushing=0, video_flush_done = 0, video_resume = 0;
static HANDLE video_thread = 0;
MP4SampleId nextVideoSampleId=1; // set in conjunction with video_flush
static void OpenVideo()
{
if (!video_opened || video_reopen)
{
consecutive_early_frames = 0;
if (!videoOutput)
videoOutput = (IVideoOutput *)SendMessage(mod.hMainWindow, WM_WA_IPC, 0, IPC_GET_IVIDEOOUTPUT);
int color_format;
double aspect_ratio=1.0;
if (video && video->GetOutputFormat(&width, &height, &color_format, &aspect_ratio) == MP4_VIDEO_SUCCESS)
{
videoOutput->extended(VIDUSER_SET_THREAD_SAFE, 1, 0);
videoOutput->open(width, height, 0, 1.0/aspect_ratio, color_format);
video_opened = true;
video_reopen = false;
}
}
}
static DecodedVideoSample *GetNextPicture()
{
void *data, *decoder_data;
MP4Timestamp timestamp=video_sample?(video_sample->timestamp):0;
switch(video->GetPicture(&data, &decoder_data, ×tamp))
{
case MP4_VIDEO_OUTPUT_FORMAT_CHANGED:
video_reopen=true;
// fall through
case MP4_VIDEO_SUCCESS:
DecodedVideoSample *decoded = new DecodedVideoSample;
decoded->decoder = video;
decoded->decoder_data = decoder_data;
decoded->timestamp = timestamp;
decoded->output = data;
return decoded;
}
return 0;
}
static void OutputPicture(DecodedVideoSample *decoded_video_sample)
{
if (decoded_video_sample)
{
int outputTime = (int)((decoded_video_sample->timestamp*1000ULL)/(uint64_t)m_video_timescale);
again:
MP4Duration realTime = GetClock();
int time_diff = outputTime - realTime;
if (time_diff > 12 && consecutive_early_frames) // plenty of time, go ahead and turn off frame dropping
{
if (--consecutive_early_frames == 0)
video->HurryUp(0);
}
else if (time_diff < -50) // shit we're way late, start dropping frames
{
video->HurryUp(1);
consecutive_early_frames += 3;
}
if (time_diff > 3)
{
HANDLE handles[] = {killEvent, video_start_flushing};
if (WaitForMultipleObjects(2, handles, FALSE, outputTime-realTime) != WAIT_TIMEOUT)
{
delete decoded_video_sample;
decoded_video_sample=0;
return;
}
goto again; // TODO: handle paused state a little better than this
}
OpenVideo(); // open video if we havn't already
videoOutput->draw(decoded_video_sample->output);
delete decoded_video_sample;
decoded_video_sample=0;
/* TODO: probably want separate audio and video done flags
if (temp->sampleId == numSamples) // done!
done = true;
*/
}
}
static bool ReadNextVideoSample()
{
while (nextVideoSampleId <= numVideoSamples)
{
VideoSample &sample=*video_sample;
unsigned __int32 buffer_size = sample.inputSize;
bool isSync=false;
MP4Duration duration, offset;
play_mp4_guard.Lock();
bool sample_read=MP4ReadSample(MP4hFile, video_track, nextVideoSampleId++, (unsigned __int8 **)&sample.input, &buffer_size, &sample.timestamp, &duration, &offset, &isSync);
play_mp4_guard.Unlock();
if (sample_read)
{
// some buggy movies store signed int32 offsets, so let's deal with it
offset = (uint32_t)offset;
int32_t signed_offset = (int32_t)offset;
sample.timestamp += signed_offset;
//int outputTime = (int)((sample.timestamp*1000ULL) /(uint64_t)m_video_timescale);
sample.inputValid = buffer_size;
return true;
}
}
return false;
}
static DWORD WINAPI VideoPlayThread(LPVOID parameter)
{
DWORD waitTime = 0;
HANDLE handles[] = {killEvent, video_flush, video_start_flushing, video_resume};
while (1)
{
int ret = WaitForMultipleObjects(4, handles, FALSE, waitTime);
if (ret == WAIT_OBJECT_0) // kill
break;
else if (ret == WAIT_OBJECT_0+1) // flush
{
if (video)
video->Flush();
ResetEvent(video_flush);
waitTime = 0;
SetEvent(video_flush_done);
}
else if (ret == WAIT_OBJECT_0+2) // start flushing
{
waitTime = INFINITE; // this will stop us from decoding samples for a while
ResetEvent(video_start_flushing);
SetEvent(video_flush_done);
}
else if (ret == WAIT_OBJECT_0+3) // resume playback (like flush but don't flush the decoder)
{
ResetEvent(video_resume);
waitTime = 0;
SetEvent(video_flush_done);
}
else if (ret == WAIT_TIMEOUT)
{
if (ReadNextVideoSample())
{
int ret = video->DecodeSample(video_sample->input, video_sample->inputValid, video_sample->timestamp);
if (ret == MP4_VIDEO_OUTPUT_FORMAT_CHANGED)
video_reopen=true;
if (ret == MP4_VIDEO_AGAIN)
nextVideoSampleId--;
DecodedVideoSample *picture = 0;
while (picture = GetNextPicture())
{
OutputPicture(picture);
}
waitTime = 0;
}
else
{
// TODO: tell decoder end-of-file and get any buffers in queue
if (!audio)
PostMessage(mod.hMainWindow, WM_WA_MPEG_EOF, 0, 0);
waitTime = INFINITE; // out of stuff to do, wait for kill or flush
}
}
else // error
break;
}
if (videoOutput)
videoOutput->close();
return 0;
}
void Video_Init()
{
width=0;
height=0;
video_reopen=false;
video_opened=false;
video_flush = CreateEvent(NULL, TRUE, FALSE, NULL);
video_start_flushing = CreateEvent(NULL, TRUE, FALSE, NULL);
video_flush_done = CreateEvent(NULL, FALSE, FALSE, NULL);
video_resume = CreateEvent(NULL, TRUE, FALSE, NULL);
video_thread = CreateThread(0, 0, VideoPlayThread, 0, 0, 0);
}
void Video_Close()
{
WaitForSingleObject(video_thread, INFINITE);
CloseHandle(video_thread);
video_thread = 0;
CloseHandle(video_start_flushing);
video_start_flushing=0;
CloseHandle(video_flush);
video_flush=0;
CloseHandle(video_resume);
video_resume=0;
CloseHandle(video_flush_done);
video_flush_done = 0;
delete video_sample;
video_sample=0;
}
|
