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added stream.cpp

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git-svn-id: svn://elaine/murooma/trunk@72 d8a302eb-03bc-478d-80e4-98257eca68ef
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(no author) 2014-07-05 21:29:51 +00:00
parent 18b3901c57
commit ff2e24e219
5 changed files with 176 additions and 414 deletions
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stream.cpp Normal file
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#include "stream.h"
#include "timeUtils.h"
#include <iostream>
#include <string.h>
Stream::Stream() : lastPlayerChunk(NULL), median(0), shortMedian(0), lastUpdate(0), skip(0), idx(0)
{
silentPlayerChunk = new PlayerChunk();
pBuffer = new DoubleBuffer<int>(30000 / PLAYER_CHUNK_MS);
pShortBuffer = new DoubleBuffer<int>(5000 / PLAYER_CHUNK_MS);
pLock = new std::unique_lock<std::mutex>(mtx);
bufferMs = 500;
}
void Stream::addChunk(Chunk* chunk)
{
Chunk* c = new Chunk(*chunk);
chunks.push_back(c);
cv.notify_all();
}
Chunk* Stream::getNextChunk()
{
Chunk* chunk = NULL;
if (chunks.empty())
cv.wait(*pLock);
chunk = chunks.front();
return chunk;
}
PlayerChunk* Stream::getNextPlayerChunk(int correction)
{
Chunk* chunk = getNextChunk();
if (correction > PLAYER_CHUNK_MS / 2)
correction = PLAYER_CHUNK_MS/2;
else if (correction < -PLAYER_CHUNK_MS/2)
correction = -PLAYER_CHUNK_MS/2;
//std::cerr << "GetNextPlayerChunk: " << correction << "\n";
// int age(0);
// age = getAge(*chunk) + outputBufferDacTime*1000 - bufferMs;
// std::cerr << "age: " << age << " \tidx: " << chunk->idx << "\n";
PlayerChunk* playerChunk = new PlayerChunk();
playerChunk->tv_sec = chunk->tv_sec;
playerChunk->tv_usec = chunk->tv_usec;
playerChunk->idx = 0;
size_t missing = PLAYER_CHUNK_SIZE;// + correction*PLAYER_CHUNK_MS_SIZE;
/* double factor = (double)PLAYER_CHUNK_MS / (double)(PLAYER_CHUNK_MS + correction);
size_t idx(0);
size_t idxCorrection(0);
for (size_t n=0; n<PLAYER_CHUNK_SIZE/2; ++n)
{
idx = chunk->idx + 2*floor(n*factor) - idxCorrection;
//std::cerr << factor << "\t" << n << "\t" << idx << "\n";
if (idx >= WIRE_CHUNK_SIZE)
{
idxCorrection = 2*floor(n*factor);
idx = 0;
chunks.pop_front();
delete chunk;
chunk = getNextChunk();
}
playerChunk->payload[2*n] = chunk->payload[idx];
playerChunk->payload[2*n+1] = chunk->payload[idx + 1];
}
addMs(chunk, -PLAYER_CHUNK_MS - correction);
chunk->idx = idx;
if (idx >= WIRE_CHUNK_SIZE)
{
chunks.pop_front();
delete chunk;
}
*/
if (chunk->idx + PLAYER_CHUNK_SIZE > WIRE_CHUNK_SIZE)
{
//std::cerr << "chunk->idx + PLAYER_CHUNK_SIZE >= WIRE_CHUNK_SIZE: " << chunk->idx + PLAYER_CHUNK_SIZE << " >= " << WIRE_CHUNK_SIZE << "\n";
memcpy(&(playerChunk->payload[0]), &chunk->payload[chunk->idx], sizeof(int16_t)*(WIRE_CHUNK_SIZE - chunk->idx));
missing = chunk->idx + PLAYER_CHUNK_SIZE - WIRE_CHUNK_SIZE;
chunks.pop_front();
delete chunk;
chunk = getNextChunk();
}
memcpy(&(playerChunk->payload[0]), &chunk->payload[chunk->idx], sizeof(int16_t)*missing);
addMs(chunk, -PLAYER_CHUNK_MS);
chunk->idx += missing;
if (chunk->idx >= WIRE_CHUNK_SIZE)
{
chunks.pop_front();
delete chunk;
}
return playerChunk;
}
PlayerChunk* Stream::getChunk(double outputBufferDacTime, unsigned long framesPerBuffer)
{
int correction(0);
if (pBuffer->full() && (abs(median) <= PLAYER_CHUNK_MS))
correction = median;
PlayerChunk* playerChunk = getNextPlayerChunk(correction);
int age = getAge(playerChunk) - bufferMs + outputBufferDacTime*1000;
pBuffer->add(age);
pShortBuffer->add(age);
// std::cerr << "Chunk: " << age << "\t" << outputBufferDacTime*1000 << "\n";
int sleep(0);
time_t now = time(NULL);
if (now != lastUpdate)
{
lastUpdate = now;
median = pBuffer->median();
shortMedian = pShortBuffer->median();
if (abs(age) > 300)
sleep = age;
if (pShortBuffer->full() && (abs(shortMedian) > WIRE_CHUNK_MS))
sleep = shortMedian;
if (pBuffer->full() && (abs(median) > PLAYER_CHUNK_MS))
sleep = median;
std::cerr << "Chunk: " << age << "\t" << shortMedian << "\t" << median << "\t" << pBuffer->size() << "\t" << outputBufferDacTime*1000 << "\n";
}
if (sleep != 0)
{
std::cerr << "Sleep: " << sleep << "\n";
pBuffer->clear();
pShortBuffer->clear();
if (sleep < 0)
{
sleepMs(100-sleep);
}
else
{
for (size_t n=0; n<(size_t)(sleep / PLAYER_CHUNK_MS); ++n)
{
delete playerChunk;
playerChunk = getNextPlayerChunk();
}
}
}
// int age = getAge(*lastPlayerChunk) + outputBufferDacTime*1000 - bufferMs;
return playerChunk;
}
void Stream::sleepMs(int ms)
{
if (ms > 0)
usleep(ms * 1000);
}