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
|
/*
* Video On Demand Samples
*
* Copyright (C) 2015 Microchip Technology Germany II GmbH & Co. KG
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* You may also obtain this software under a propriety license from Microchip.
* Please contact Microchip for further information.
*
*/
#include <stdint.h>
#include "Console.h"
#include "SourceFile.h"
uint32_t CSource::m_nInstCnt = 0;
CSourceFile::CSourceFile(const char *szFile, bool autoDestroy)
{
m_bAutoDestroy = autoDestroy;
m_hFile = fopen64(szFile, "rb"); // try to open file
if (NULL == m_hFile) {
ConsolePrintf( PRIO_ERROR, RED"CSourceFile: unable to open file %s"RESETCOLOR"\n", szFile);
return;
}
strncpy(m_szFileName, szFile, sizeof(m_szFileName));
fseek(m_hFile, 0, SEEK_END); // get file's length
fpos64_t pos;
int result = fgetpos64(m_hFile, &pos);
if (result == 0)
m_nLength = pos.__pos;
else
m_nLength = -1;
fseek(m_hFile, 0, SEEK_SET); // start reading from start of file
uint8_t Ts[READ_LEN]; // get PIDs for video and audio
uint32_t bytesRead = fread(// read a chunk from file and write it into ring buffer
Ts,
1,
READ_LEN,
m_hFile);
if (READ_LEN != bytesRead) { // no complete block available?
Close();
return;
}
for (uint8_t *pTs = Ts; pTs < Ts + READ_LEN; pTs += 188) {
if (PID_INVALID == m_nPPid) {
if (GetIsPat(pTs))
m_nPPid = GetPmtPidFromPat(pTs, 0);
} else if (GetHasPid(pTs, m_nPPid)) {
m_nAPid = GetAudioPidFromPmt(pTs);
m_nVPid = GetVideoPidFromPmt(pTs);
break;
}
}
if (PID_INVALID == m_nPPid) { // PMT found ?
ConsolePrintf( PRIO_ERROR, RED"CSourceFile: no PMT found in file %s"RESETCOLOR"\n", szFile);
Close();
return;
}
uint64_t nBlocks = (m_nLength / READ_LEN) -
1; // number of read blocks in file
for (; (nBlocks) && (PCR_INVALID == m_nLastPcr); nBlocks--) {
fseek(m_hFile, nBlocks * READ_LEN,
SEEK_SET); // read backwards from end of file
if (READ_LEN !=
fread( // read a chunk from file and write it into ring buffer
Ts,
1,
READ_LEN,
m_hFile)) { // no complete block available?
Close();
return;
}
for (uint8_t *pTs = Ts; (pTs < Ts + READ_LEN)
&& (PCR_INVALID == m_nLastPcr); pTs += 188) {
m_nLastPcr = GetPcr(pTs);
}
}
fseek(m_hFile, 0, SEEK_SET); // start reading from start of file
ConsolePrintf( PRIO_MEDIUM, "Stream started file: %s\n", m_szFileName);
}
CSourceFile::~CSourceFile()
{
Close();
}
void CSourceFile::Close()
{
if (NULL != m_hFile) {
fclose(m_hFile);
m_hFile = NULL;
ConsolePrintf( PRIO_MEDIUM, "Stream closed file: %s\n", m_szFileName);
}
}
bool CSourceFile::FillBuffer()
{
if (true == m_bPause || // source paused?
0 == m_Stream.Size() || // no receiving streams?
NULL == m_hFile || // file already closed?
!GetCanWrite() ) // ring buffer full?
{
return false;
}
if ( INVALID_POS != m_fReqPos) { // user requested to play from other position?
int64_t nPos = ((m_nLength * (int64_t)m_fReqPos / (int64_t)1000) /
(int64_t)TS_PACKET_LEN) * (int64_t)TS_PACKET_LEN; // stay TS packet aligned
ConsolePrintf( PRIO_MEDIUM, "Stream seek to %lld (%lld per mil) for file: %s\r\n", nPos,((int64_t)1000 * nPos / m_nLength), m_szFileName);
m_fReqPos = INVALID_POS;
if (PID_INVALID != GetVPid()) { // if there is a video ES, seek to previous I frame
uint8_t Ts[TS_PACKET_LEN];
for (; nPos; nPos -= TS_PACKET_LEN) {
fseeko64(m_hFile, nPos, SEEK_SET);
if ( TS_PACKET_LEN != fread(Ts, 1, TS_PACKET_LEN, m_hFile) )
break;
if (GetIsStartOfIFrame(Ts)) // start of I frame?
break;
}
}
fseeko64(m_hFile, nPos, SEEK_SET); // seek to requested position
}
if ( READ_LEN != fread(GetWritePos(),1,READ_LEN,m_hFile) ) { // no complete chunk available?
ConsolePrintf( PRIO_MEDIUM, "CSourceFile: EOF for file: %s\r\n", m_szFileName);
//TODO: remove quick hack:
if (true || m_bRepetition)
m_fReqPos = 0;
else
Close();
return false;
}
m_nBytesRead += READ_LEN;
WriteDone();
return true;
}
|
