MPD  0.20.18
OggEncoder.hxx
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1 /*
2  * Copyright 2003-2017 The Music Player Daemon Project
3  * http://www.musicpd.org
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation; either version 2 of the License, or
8  * (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU General Public License for more details.
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17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18  */
19 
20 #ifndef MPD_OGG_ENCODER_HXX
21 #define MPD_OGG_ENCODER_HXX
22 
23 #include "config.h"
24 #include "../EncoderAPI.hxx"
26 #include "lib/xiph/OggPage.hxx"
27 #include "lib/xiph/OggSerial.hxx"
28 
29 #include <ogg/ogg.h>
30 
35 class OggEncoder : public Encoder {
36  /* initialize "flush" to true, so the caller gets the full
37  headers on the first read */
38  bool flush = true;
39 
40 protected:
42 
43 public:
44  OggEncoder(bool _implements_tag)
45  :Encoder(_implements_tag),
47  }
48 
49  /* virtual methods from class Encoder */
50  void Flush() final {
51  flush = true;
52  }
53 
54  size_t Read(void *dest, size_t length) override {
55  ogg_page page;
56  bool success = stream.PageOut(page);
57  if (!success) {
58  if (flush) {
59  flush = false;
60  success = stream.Flush(page);
61  }
62 
63  if (!success)
64  return 0;
65  }
66 
67  return ReadPage(page, dest, length);
68  }
69 };
70 
71 #endif
static size_t ReadPage(const ogg_page &page, void *_buffer, size_t size)
Definition: OggPage.hxx:32
bool PageOut(ogg_page &page)
OggStreamState stream
Definition: OggEncoder.hxx:41
An abstract base class which contains code common to all encoders with Ogg container output...
Definition: OggEncoder.hxx:35
size_t Read(void *dest, size_t length) override
Reads encoded data from the encoder.
Definition: OggEncoder.hxx:54
void Flush() final
Flushes an encoder object, make everything which might currently be buffered available by Read()...
Definition: OggEncoder.hxx:50
bool Flush(ogg_page &page)
OggEncoder(bool _implements_tag)
Definition: OggEncoder.hxx:44
int GenerateOggSerial()
Generate the next pseudo-random Ogg serial.