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Improved MediaPlayer performance by adding a dual-frame alternating

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mechanism with mutex (read and write indices alternating between g-
streamer read thread and opengl write thread).
This commit is contained in:
brunoherbelin
2020-07-13 22:22:47 +02:00
parent 02d48eee10
commit c2e4eea7eb
2 changed files with 201 additions and 142 deletions
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22
MediaPlayer.h
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@@ -8,6 +8,7 @@
#include <list>
#include <map>
#include <utility>
#include <mutex>
#include <gst/gst.h>
#include <gst/gl/gl.h>
@@ -18,15 +19,17 @@ class Visitor;
#define MAX_PLAY_SPEED 20.0
#define MIN_PLAY_SPEED 0.1
#define N_VFRAME 2
struct TimeCounter {
GstClockTime current_time;
GstClockTime last_time;
GstClockTime tic_time;
int nbFrames;
float fps;
public:
TimeCounter();
GstClockTime dt();
void tic();
void reset();
float frameRate() const;
@@ -252,6 +255,7 @@ private:
GstClockTime frame_duration_;
gdouble rate_;
LoopMode loop_;
std::atomic<bool> need_loop_;
TimeCounter timecount_;
gdouble framerate_;
GstState desired_state_;
@@ -259,10 +263,18 @@ private:
GstDiscoverer *discoverer_;
std::stringstream discoverer_message_;
std::string codec_name_;
GstVideoFrame v_frame_;
GstVideoInfo v_frame_video_info_;
std::atomic<bool> v_frame_is_full_;
std::atomic<bool> need_loop_;
// GstVideoFrame v_frame_;
// std::atomic<bool> v_frame_is_full_;
guint vframe_read_index_;
guint vframe_write_index_;
GstVideoFrame vframe_[N_VFRAME];
std::atomic<bool> vframe_is_full_[N_VFRAME];
GstClockTime vframe_position_[N_VFRAME];
std::mutex vframe_lock_[N_VFRAME];
std::mutex vframe_index_lock_;
// for PBO
guint pbo_[2];
@@ -283,7 +295,7 @@ private:
void execute_open();
void execute_loop_command();
void execute_seek_command(GstClockTime target = GST_CLOCK_TIME_NONE);
bool fill_v_frame(GstBuffer *buf, bool ignorepts = false);
bool fill_v_frame(GstBuffer *buf);
static GstFlowReturn callback_pull_sample_video (GstElement *bin, MediaPlayer *m);
static void callback_end_of_video (GstElement *, MediaPlayer *m);