2 Copyright 2006-2008 Mark Calderbank
4 This file is part of VOMP.
6 VOMP is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 VOMP is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with VOMP; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
21 #include "demuxerts.h"
24 DemuxerTS::DemuxerTS(int p_vID, int p_aID, int p_subID)
26 vID = p_vID; vActive = false;
27 aID = p_aID; aActive = false;
28 subID = p_subID; subActive = false;
33 void DemuxerTS::flush()
38 vPacket.init(PESTYPE_VID0);
42 aPacket.init(PESTYPE_PRIVATE_1, PESTYPE_SUBSTREAM_AC30);
46 aPacket.init(PESTYPE_AUD0);
49 subPacket.init(PESTYPE_PRIVATE_1);
56 int DemuxerTS::scan(UCHAR *buf, int len)
61 return PESTYPE_PRIVATE_1;
68 void DemuxerTS::setVID(int p_vID)
71 vPacket.init(PESTYPE_VID0);
75 void DemuxerTS::setAID(int p_aID, int type)
82 aPacket.init(PESTYPE_PRIVATE_1, PESTYPE_SUBSTREAM_AC30);
83 setAudioStream(PESTYPE_SUBSTREAM_AC30);
87 aPacket.init(PESTYPE_AUD0);
88 setAudioStream(PESTYPE_AUD0);
94 void DemuxerTS::setSubID(int p_subID)
97 subPacket.init(PESTYPE_PRIVATE_1);
102 int DemuxerTS::findPTS(UCHAR* buf, int len, ULLONG* dest)
104 UINT LoPattern = 0x100 | PESTYPE_VID0,
105 HiPattern = 0x100 | PESTYPE_VIDMAX;
109 UINT pattern = *(UINT*)buf;
111 if (pattern < LoPattern || pattern > HiPattern) continue;
113 UINT framelength = ((UINT)buf[3] << 8) | buf[4];
116 if ( buf[1] & 0x80 ) // PTS_DTS_flags indicate that PTS is present
118 *dest = ( (ULLONG)(buf[3] & 0x0E) << 29 ) |
119 ( (ULLONG)(buf[4]) << 22 ) |
120 ( (ULLONG)(buf[5] & 0xFE) << 14 ) |
121 ( (ULLONG)(buf[6]) << 7 ) |
122 ( (ULLONG)(buf[7] & 0xFE) >> 1 );
126 buf += framelength; len -= framelength;
132 int DemuxerTS::put(UCHAR* buf, int len)
134 int ret = 0; // return number of bytes consumed
138 if (len >= TS_SIZE + 1 - partPacket)
139 { // Remainder of partial packet is available, plus one
140 memcpy(store+partPacket, buf, TS_SIZE - partPacket);
141 ret += TS_SIZE - partPacket;
142 buf += TS_SIZE - partPacket;
143 len -= TS_SIZE - partPacket;
144 partPacket = TS_SIZE;
146 { // Packet is properly terminated
147 int rc = processTS(store);
149 partPacket = 0; // Successfully processed
151 return ret; // Try again later.
154 { // Packet not terminated. Find another candidate, and shift store
155 Log::getInstance()->log("TS Demuxer", Log::ERR, "TS Misaligned!");
157 while (search < partPacket && store[search] != TS_SIG)
159 partPacket -= search;
160 if (partPacket) memcpy(store, store+search, partPacket);
164 { // Still don't have complete packet. Consume what we do have.
165 memcpy(store+partPacket, buf, len);
172 // Position ourselves at a candidate TS packet
173 while (len > 0 && *buf != TS_SIG)
175 Log::getInstance()->log("TS Demuxer", Log::ERR, "TS Misaligned!");
181 if (len < TS_SIZE + 1)
182 { // Not enough data. Store what we have.
183 memcpy(store, buf, len);
189 if (buf[TS_SIZE] != TS_SIG)
190 { // Not terminated correctly.
192 while (len > 0 && *buf != TS_SIG)
199 int rc = processTS(buf);
201 { // Successfully processed
202 buf += TS_SIZE; ret += TS_SIZE; len -= TS_SIZE;
205 { // Processing failed.
213 int DemuxerTS::processTS(UCHAR* buf)
215 int datalen = TS_SIZE - 4;
216 int pid = ( (buf[1] & 0x1F) << 8 ) | buf[2];
217 UCHAR payload = buf[1] & 0x40;
219 if (buf[3] & 0x20) // Adaptation field is present
220 datalen -= (buf[4] + 1);
221 if (datalen < 0) // Error in stream TODO log this
223 if (datalen == 0) // Null packet
225 buf += (TS_SIZE - datalen);
237 parsePacketDetails(vPacket);
240 rc = submitPacket(vPacket);
250 parsePacketDetails(aPacket);
253 rc = submitPacket(aPacket);
263 parsePacketDetails(subPacket);
266 rc = submitPacket(subPacket);
271 if (rc == 0) return 0;
276 vPacket.init(PESTYPE_VID0);
277 buf += 6; datalen -= 6;
284 aPacket.init(PESTYPE_PRIVATE_1, PESTYPE_SUBSTREAM_AC30);
288 aPacket.init(PESTYPE_AUD0);
291 buf += 6; datalen -= 6;
295 subPacket.init(PESTYPE_PRIVATE_1);
296 subLength = (buf[4] << 8) + buf[5];
297 buf += 6; datalen -= 6;
301 if ( (pid == vID && vActive) ||
302 (pid == aID && aActive) ||
303 (pid == subID && subActive) )
305 PESPacket* packet = NULL;
306 if (pid == vID) packet = &vPacket;
307 if (pid == aID) packet = &aPacket;
308 if (pid == subID) packet = &subPacket;
311 if (packet->write(buf, datalen) == 0)
312 { // Writing to packet failed. It has overflowed.
315 parsePacketDetails(*packet);
318 if (submitPacket(*packet) == 0) return 0;
321 packet->write((UCHAR*)"\200\000\000", 3);
322 packet->write(buf, datalen);
327 if (pid == subID && subActive && subPacket.getLength() == subLength)
329 parsePacketDetails(subPacket);
330 Log::getInstance()->log("DEMUXERTS", Log::DEBUG, "SUBMITTING A SUBTITLE PACKET %d %x", subLength, subPacket.getSubstream());
331 submitPacket(subPacket);