+
+#if CONFIG_LINUX_PERF
+
+#define START_TIMER \
+ static int linux_perf_fd; \
+ uint64_t tperf; \
+ if (!linux_perf_fd) { \
+ struct perf_event_attr attr = { \
+ .type = PERF_TYPE_HARDWARE, \
+ .size = sizeof(struct perf_event_attr), \
+ .config = PERF_COUNT_HW_CPU_CYCLES, \
+ .disabled = 1, \
+ .exclude_kernel = 1, \
+ .exclude_hv = 1, \
+ }; \
+ linux_perf_fd = syscall(__NR_perf_event_open, &attr, \
+ 0, -1, -1, 0); \
+ } \
+ if (linux_perf_fd == -1) { \
+ av_log(NULL, AV_LOG_ERROR, "perf_event_open failed: %s\n", \
+ av_err2str(AVERROR(errno))); \
+ } else { \
+ ioctl(linux_perf_fd, PERF_EVENT_IOC_RESET, 0); \
+ ioctl(linux_perf_fd, PERF_EVENT_IOC_ENABLE, 0); \
+ }
+
+#define STOP_TIMER(id) \
+ ioctl(linux_perf_fd, PERF_EVENT_IOC_DISABLE, 0); \
+ read(linux_perf_fd, &tperf, sizeof(tperf)); \
+ TIMER_REPORT(id, tperf)
+
+#elif defined(AV_READ_TIME)
+#define START_TIMER \
+ uint64_t tend; \
+ uint64_t tstart = AV_READ_TIME(); \
+
+#define STOP_TIMER(id) \
+ tend = AV_READ_TIME(); \
+ TIMER_REPORT(id, tend - tstart)