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Adjust the quality based on the dropped frames.

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This commit is contained in:
Maschell 2018-07-13 19:17:05 +02:00
parent 2f00c98562
commit c7c7aefe1f
3 changed files with 42 additions and 7 deletions
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6
src/EncodingHelper.cpp
View File

@ -84,7 +84,7 @@ JpegInformation * convertToJpeg(uint8_t * sourceBuffer, uint32_t width, uint32_t
return NULL;
}
extern int32_t curQuality;
void EncodingHelper::DoAsyncThreadInternal(CThread *thread) {
serverRunning = true;
@ -99,7 +99,7 @@ void EncodingHelper::DoAsyncThreadInternal(CThread *thread) {
DEBUG_FUNCTION_LINE("We should stop\n");
break;
}
OSSleepTicks(OSMicrosecondsToTicks(5000));
OSSleepTicks(OSMicrosecondsToTicks(500));
continue;
}
DCFlushRange(&message,sizeof(OSMessage));
@ -112,7 +112,7 @@ void EncodingHelper::DoAsyncThreadInternal(CThread *thread) {
colorBuffer = (GX2ColorBuffer *) message.args[1];
JpegInformation * info = convertToJpeg((uint8_t*) colorBuffer->surface.image,colorBuffer->surface.width,colorBuffer->surface.height,colorBuffer->surface.pitch,colorBuffer->surface.format,85);
JpegInformation * info = convertToJpeg((uint8_t*) colorBuffer->surface.image,colorBuffer->surface.width,colorBuffer->surface.height,colorBuffer->surface.pitch,colorBuffer->surface.format, curQuality);
if(info != NULL ) {
MJPEGStreamServer::getInstance()->streamJPEG(info);

6
src/MJPEGStreamServer.hpp
View File

@ -28,6 +28,7 @@
extern OSMessageQueue streamSendQueue;
extern OSMessage streamSendQueueMessages[STREAM_SEND_QUEUE_MESSAGE_COUNT];
extern uint32_t frame_counter_skipped;
class MJPEGStreamServer: TCPServer {
@ -79,8 +80,9 @@ public:
OSMessage message;
message.message = (void *) 0x11111;
message.args[0] = (uint32_t) info;
if(!OSSendMessage(&streamSendQueue,&message,OS_MESSAGE_FLAGS_BLOCKING)) {
DEBUG_FUNCTION_LINE("Dropping frame\n");
if(!OSSendMessage(&streamSendQueue,&message,OS_MESSAGE_FLAGS_NONE)) {
frame_counter_skipped++;
//DEBUG_FUNCTION_LINE("Dropping frame\n");
delete info;
return false;
};

37
src/stream_utils.cpp
View File

@ -91,6 +91,13 @@ bool copyBuffer(GX2ColorBuffer * sourceBuffer, GX2ColorBuffer * targetBuffer, ui
uint32_t frame_counter = 0;
uint32_t frame_counter_skipped = 0;
int32_t curQuality = 50;
int32_t minQuality = 40;
int32_t maxQuality = 85;
int32_t stepQuality = 1;
int32_t maxFrameDropsQuality = 20;
int32_t minFrameDropsQuality = 95;
bool streamVideo(GX2ColorBuffer *srcBuffer) {
if(srcBuffer == NULL) {
@ -163,8 +170,34 @@ bool streamVideo(GX2ColorBuffer *srcBuffer) {
result = false;
}
if(frame_counter % 120 == 0) {
DEBUG_FUNCTION_LINE("Send %d frames, skipped %d. %.2f\n",frame_counter-frame_counter_skipped,frame_counter_skipped,100.f * (frame_counter_skipped*1.0f/frame_counter));
if(frame_counter % 60 == 0) { // Print this every second.
int32_t curRatio = (int32_t)100.f*(frame_counter_skipped*1.0f/frame_counter);
int32_t curQualityOld = curQuality;
if(curRatio > maxFrameDropsQuality) { // Lower the quality if we drop more than [maxFrameDropsQuality]% of the frames.
curQuality -= (curRatio - maxFrameDropsQuality);
} else if(curRatio < minFrameDropsQuality) { // Increase the quality if we drop less than [minFrameDropsQuality]% of the frames.
curQuality += stepQuality; // Increase the quality by [stepQuality]%
}
// Make sure to set the quality to at least [minQuality]%
if(curQuality < minQuality) {
curQuality = minQuality;
}
// Make sure to set the quality to at most [maxQuality]%
if(curQuality >= maxQuality) {
curQuality = maxQuality;
}
DEBUG_FUNCTION_LINE("Streaming at %d fps\n",frame_counter-frame_counter_skipped);
frame_counter = 0;
frame_counter_skipped = 0;
if(curQualityOld != curQuality) {
DEBUG_FUNCTION_LINE("Quality is now at %d%%\n",curQuality);
}
}
return result;