CalvinBackup/FastCarPlay
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Optimise and refactor protocol, better logging, optimise rendering, double buffering.

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This commit is contained in:
Niellune
2026-03-23 07:00:36 +02:00
parent b9047f65b8
commit b7e131bc38
41 changed files with 1746 additions and 1748 deletions
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src/struct/video_buffer.h
+18 -7
View File
@@ -1,5 +1,5 @@
#ifndef SRC_STRUCT_VIDEO_BUFFER
#define SRC_STRUCT_VIDEO_BUFFER
#ifndef SRC_STRUCT_VIDER_BUFFER2
#define SRC_STRUCT_VIDER_BUFFER2
extern "C"
{
@@ -9,7 +9,7 @@ extern "C"
#include <atomic>
#include <stdexcept>
#define BUFFER_VIDEO_FRAMES 3
#define BUFFER_VIDEO_FRAMES 4
class VideoBuffer
{
@@ -17,6 +17,7 @@ public:
VideoBuffer()
{
_writing.store(0);
_oldest.store(-1);
_reading.store(-1);
_latest.store(-1);
for (uint8_t i = 0; i < BUFFER_VIDEO_FRAMES; ++i)
@@ -52,10 +53,15 @@ public:
bool latest(AVFrame **frame, uint32_t *id)
{
_reading.store(_latest.load());
_reading.store(_oldest.load());
int index = _reading.load();
if (index < 0)
return false;
{
_reading.store(_latest.load());
index = _reading.load();
if (index < 0)
return false;
}
*frame = _frames[index];
*id = _ids[index];
return true;
@@ -63,13 +69,15 @@ public:
void consume()
{
if(_oldest.load() == _reading.load())
_oldest.store(-1);
_reading.store(-1);
}
AVFrame *write(uint32_t id)
{
int index = _writing.load();
while (index == _reading.load() || index == _latest.load())
while (index == _reading.load() || index == _latest.load() || index == _oldest.load())
{
index = (index + 1) % BUFFER_VIDEO_FRAMES;
}
@@ -80,17 +88,20 @@ public:
void commit()
{
_oldest.store(_latest.load());
_latest.store(_writing.load());
}
void reset()
{
_writing.store(0);
_oldest.store(-1);
_reading.store(-1);
_latest.store(-1);
}
private:
std::atomic<int8_t> _oldest;
std::atomic<int8_t> _latest;
std::atomic<int8_t> _reading;
std::atomic<int8_t> _writing;
@@ -98,4 +109,4 @@ private:
uint32_t _ids[BUFFER_VIDEO_FRAMES];
};
#endif /* SRC_STRUCT_VIDEO_BUFFER */
#endif /* SRC_STRUCT_VIDER_BUFFER2 */