performance_analyzer.py

import subprocess
import time
import os

class PerformanceAnalyzer:
    def __init__(self):
        pass

    def compile_ffmpeg(self, compiler_flags):
        # Clean previous builds
        subprocess.run(['make', 'distclean'], cwd='ffmpeg_source', stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
        configure_cmd = ['./configure', '--disable-doc', '--disable-debug', f'CFLAGS={" ".join(compiler_flags)}']
        start_time = time.time()
        try:
            # Configure
            subprocess.run(configure_cmd, check=True, cwd='ffmpeg_source', stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
            # Build
            energy_before = self.get_energy_usage()
            subprocess.run(['make', '-j4'], check=True, cwd='ffmpeg_source', stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
            energy_after = self.get_energy_usage()
            end_time = time.time()

            compile_time = end_time - start_time
            energy_consumption = energy_after - energy_before
            return compile_time, energy_consumption
        except subprocess.CalledProcessError:
            print("FFmpeg compilation failed")
            return None, None

    def get_energy_usage(self):
        # Placeholder for energy measurement logic; integrate with Intel RAPL or other tools
        energy_usage = 0
        try:
            with open("/sys/class/powercap/intel-rapl/intel-rapl:0/energy_uj", "r") as f:
                energy_usage = int(f.read().strip())
        except FileNotFoundError:
            print("Energy measurement not supported on this system.")
        return energy_usage / 1e6  # Convert from microjoules to joules