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-rw-r--r--src/inputs/Input.h111
-rw-r--r--src/inputs/InputBuffered.cpp131
-rw-r--r--src/inputs/InputDabplusFile.cpp8
-rw-r--r--src/inputs/InputMpegFile.cpp7
-rw-r--r--src/inputs/InputTest.cpp16
5 files changed, 220 insertions, 53 deletions
diff --git a/src/inputs/Input.h b/src/inputs/Input.h
index 42c2ef7..a6a7231 100644
--- a/src/inputs/Input.h
+++ b/src/inputs/Input.h
@@ -31,6 +31,7 @@
#endif
#include <vector>
+#include <list>
#include <string>
#include <stdint.h>
@@ -38,41 +39,53 @@ class InputBase {
public:
virtual int Open();
- virtual int Lock(); // TODO get rid of lock/unlock
- virtual int Unlock();
+
+ // Must return a string with a name, used for logging
+ virtual const char* GetName();
// ReadFrame must return exactly the right number of bytes
// for the format, which means it must fill the buffer to
// <size> bytes.
virtual int ReadFrame(void* buffer, int size);
- // TODO: ehm, where do we need this ?
- virtual int SetBitrate(int bitrate);
-
virtual int Close();
virtual int Clean(); // TODO destructor
};
-/********************************************/
-/** TEST INPUT ***********************/
-/********************************************/
+enum BufferState
+{
+ PREBUFFERING = 0,
+ RUNNING
+};
-// Implement mostly everything, but don't do anything
-class InputTest : InputBase {
+class InputBuffered : public InputBase {
public:
- InputTest() : counter(0) {}
- int Open();
- int Lock();
- int Unlock();
- int ReadFrame(void* buffer, int size);
- int SetBitrate(int bitrate);
- int Close();
- int Clean();
+ virtual int ReadFrame(void* buffer, int size);
+ protected:
+ InputBuffered(int prebuffer_stages, int source_size,
+ int overfull_thresh) :
+ m_source_size(source_size),
+ m_prebuffer_stages(prebuffer_stages),
+ m_overfull_thresh(overfull_thresh),
+ m_bufferstate(PREBUFFERING)
+ { } ;
+
+ // Reads a frame from the source, into the buffer
+ virtual int ReadSource(void* buffer, int size);
+
+ virtual bool FillBuffer();
private:
- unsigned long counter;
-};
+ InputBuffered() {};
+ int m_source_size;
+ int m_prebuffer_count;
+ int m_prebuffer_stages;
+ int m_overfull_thresh;
+ BufferState m_bufferstate;
+
+ std::list< std::vector<char> > m_buffer;
+};
/********************************************/
/** FILE INPUTS ***********************/
@@ -84,39 +97,73 @@ class InputTest : InputBase {
// for Fifo, and also for different file types.
class InputFile : InputBase {
public:
- InputFile(std::string fileName) : filename(fileName) {}
- int Open();
- int Close();
- int Rewind();
+ InputFile(std::string fileName) : m_filename(fileName) {}
+ virtual int Open();
+ virtual int Close();
+ virtual int Rewind();
protected:
- long ReadData(void* data, size_t size, unsigned int tries);
- std::string filename;
+ std::string m_filename;
int file; // the file descriptor
};
#ifdef HAVE_FORMAT_MPEG
-class InputMpegFile : InputFile {
+class InputMpegFile : public InputFile, public InputBuffered {
public:
- InputMpegFile(std::string fileName) : filename(fileName) {}
+ InputMpegFile(std::string fileName) :
+ InputFile(fileName),
+ InputBuffered(prebuffer_stages, source_size, overfull_thresh)
+ { m_name = "mpeg " + m_filename;}
int ReadFrame(void* buffer, int size);
+ const char* GetName();
private:
+ std::string m_name;
+ int ReadSource(void* buffer, int size);
bool parity;
};
#endif // HAVE_FORMAT_MPEG
#ifdef HAVE_FORMAT_DABPLUS
-class InputDabplusFile : InputFile {
+class InputDabplusFile : public InputFile, public InputBuffered {
public:
- InputMpegFile(std::string fileName) : filename(fileName) {}
+ InputDabplusFile(
+ std::string fileName,
+ int prebuffer_stages,
+ int frame_size,
+ int overfull_thresh) :
+ InputFile(fileName),
+ InputBuffered(prebuffer_stages, frame_size, overfull_thresh)
+ { m_name = "dabplus " + m_filename;}
int ReadFrame(void* buffer, int size);
+ const char* GetName();
private:
- int Read(void* buffer, int size);
+ std::string m_name;
+ int ReadSuperFrame(void* buffer, int size);
+ int ReadSource(void* buffer, int size);
std::vector<uint8_t> buffer;
size_t bufferIndex;
};
#endif
-#endif
+#endif // INPUT_FILE
+
+
+/********************************************/
+/** TEST INPUT ***********************/
+/********************************************/
+
+// Implement mostly everything, but don't do anything
+class InputTest : InputBase {
+ public:
+ InputTest() : counter(0) {}
+ int Open();
+ int ReadFrame(void* buffer, int size);
+ const char* GetName();
+ int Close();
+ int Clean();
+
+ private:
+ unsigned long counter;
+};
#endif
diff --git a/src/inputs/InputBuffered.cpp b/src/inputs/InputBuffered.cpp
new file mode 100644
index 0000000..9eea2a7
--- /dev/null
+++ b/src/inputs/InputBuffered.cpp
@@ -0,0 +1,131 @@
+/*
+ Copyright (C) 2009 Her Majesty the Queen in Right of Canada (Communications
+ Research Center Canada)
+
+ Copyright (C) 2013 Matthias P. Braendli
+ http://mpb.li
+
+ Base class for buffered inputs
+
+ */
+/*
+ This file is part of CRC-DabMux.
+
+ CRC-DabMux 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 3 of the
+ License, or (at your option) any later version.
+
+ CRC-DabMux 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 CRC-DabMux. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "inputs/Input.h"
+
+
+#include "TcpLog.h"
+
+#include <string>
+#include <cstring>
+#include <cstdlib>
+#include <cstdio>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+
+#ifndef _WIN32
+# define O_BINARY 0
+#endif
+
+extern TcpLog etiLog;
+
+int InputBuffered::ReadFrame(void* buffer, int size)
+{
+ int retval = 0;
+ bool rc;
+
+ switch (m_bufferstate) {
+ case PREBUFFERING:
+ rc = FillBuffer();
+ if (rc) {
+ m_prebuffer_count--;
+ }
+ if (m_prebuffer_count == 0) {
+ etiLog.print(TcpLog::NOTICE, "input %s: pre-buffering complete\n",
+ GetName());
+ m_bufferstate = RUNNING;
+ }
+ break;
+
+ case RUNNING:
+ rc = FillBuffer();
+ if (m_buffer.empty()) {
+ etiLog.print(TcpLog::WARNING,
+ "input %s input empty, re-enabling pre-buffering\n",
+ GetName());
+
+ // reinitialise prebuffering
+ m_bufferstate = PREBUFFERING;
+ m_prebuffer_count = m_prebuffer_stages;
+ }
+ else {
+ std::vector<char> &buffer_head = m_buffer.front();
+
+ memcpy(buffer, &buffer_head.front(), size);
+ etiLog.print(TcpLog::NOTICE,
+ "input %s got %d, %d\n",
+ GetName(), rc, m_buffer.size());
+
+ m_buffer.pop_front();
+ retval = size;
+ }
+ break;
+ }
+
+ // If we haven't filled buffer, return a nulled one
+ if (retval == 0) {
+ memset(buffer, 0, size);
+ retval = size;
+ }
+
+ return retval;
+}
+
+// This implemenation of FillBuffer assumes that
+// input and output frames have same size.
+// That's not the case with DAB+ superframes
+bool InputBuffered::FillBuffer()
+{
+ if (m_buffer.size() > m_overfull_thresh) {
+ etiLog.print(TcpLog::WARNING,
+ "input %s buffer full, dropping frame !\n",
+ GetName());
+
+ // drop the surplus
+ int num_frames_to_drop = m_buffer.size() - m_overfull_thresh;
+ while (num_frames_to_drop--)
+ m_buffer.pop_front();
+
+ return true;
+ }
+ else {
+ // copy the input frame into the frame_buffer one to one
+ std::vector<char> frame(m_source_size);
+ int rc = ReadSource(&frame.front(), m_source_size);
+ if (rc == m_source_size)
+ {
+ m_buffer.push_back(frame);
+ return true;
+ }
+ else
+ {
+ return false;
+ }
+ }
+}
+
diff --git a/src/inputs/InputDabplusFile.cpp b/src/inputs/InputDabplusFile.cpp
index b55b3d9..ad76f9c 100644
--- a/src/inputs/InputDabplusFile.cpp
+++ b/src/inputs/InputDabplusFile.cpp
@@ -49,7 +49,7 @@
extern TcpLog etiLog;
-int InputDabplusFile::Read(void* buffer, int size)
+int InputDabplusFile::ReadSuperFrame(void* buffer, int size)
{
if (this->buffer.size() != size * 5) {
this->buffer.resize(size * 5);
@@ -73,12 +73,12 @@ int InputDabplusFile::Read(void* buffer, int size)
return size;
}
-int InputDabplusFile::ReadFrame(void* buffer, int size)
+int InputDabplusFile::ReadSource(void* buffer, int size)
{
int result;
uint8_t* dataOut = reinterpret_cast<uint8_t*>(buffer);
- result = Read(dataOut, size);
+ result = ReadSuperFrame(dataOut, size);
if (result == -1) {
etiLog.print(TcpLog::CRIT, "ERROR: Can't read file\n");
perror("");
@@ -92,7 +92,7 @@ int InputDabplusFile::ReadFrame(void* buffer, int size)
return -1;
}
- result = Read(dataOut + sizeOut, size - sizeOut);
+ result = ReadSuperFrame(dataOut + sizeOut, size - sizeOut);
if (result == -1) {
etiLog.print(TcpLog::CRIT, "ERROR: Can't read file\n");
perror("");
diff --git a/src/inputs/InputMpegFile.cpp b/src/inputs/InputMpegFile.cpp
index 265b0ee..480a251 100644
--- a/src/inputs/InputMpegFile.cpp
+++ b/src/inputs/InputMpegFile.cpp
@@ -53,6 +53,11 @@ extern TcpLog etiLog;
#define MPEG_ORIGINAL -5
#define MPEG_EMPHASIS -6
+const char* InputMpegFile::GetName()
+{
+ return m_name.c_str();
+}
+
int checkDabMpegFrame(void* data)
{
mpegHeader* header = (mpegHeader*)data;
@@ -79,7 +84,7 @@ int checkDabMpegFrame(void* data)
return -1;
}
-int InputMpegFile::ReadFrame(void* buffer, int size)
+int InputMpegFile::ReadSource(void* buffer, int size)
{
int result;
bool rewind = false;
diff --git a/src/inputs/InputTest.cpp b/src/inputs/InputTest.cpp
index 4d2881e..6510bd1 100644
--- a/src/inputs/InputTest.cpp
+++ b/src/inputs/InputTest.cpp
@@ -40,16 +40,6 @@ int InputTest::Open()
return 0;
}
-int InputTest::Lock()
-{
- return 0;
-}
-
-int InputTest::Unlock()
-{
- return 0;
-}
-
int InputTest::ReadFrame(void* buffer, int size)
{
char* data = (char*)buffer;
@@ -62,12 +52,6 @@ int InputTest::ReadFrame(void* buffer, int size)
return size;
}
-int InputTest::SetBitrate(int bitrate)
-{
- return bitrate;
-}
-
-
int InputTest::Close()
{
return 0;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 03:01:28 +0000