[x264-devel] Cycles for X264

[Zubair Ali Khan]

Hi all,

I am running X264 on ARM Snapdragon processor (similar to Cortex-8). It 
seems to be taking quite a bit of cycles.

For example, each call to encode will consume average 100 million 
cycles, limiting the frame rate to 5 frames per second on this 
processor. My expectation was average 15 million cycles per call. Am I 
expecting too much or is it some configuration issue?

I compiled it with Neon support (I see assembly being compiled in for ARM).
--
x264 [info]: using cpu capabilities: ARMv6 NEON
x264 [info]: profile Baseline, level 2.1
--

I have configured it as:
--
     x264_param_default(p_ptr)
     x264_param_default_preset(p_ptr, "fast", "zerolatency")
     x264_param_apply_profile(p_ptr, "baseline")
     p_ptr->i_width = 352;
     p_ptr->i_height = 288;
     p_ptr->i_csp = 1;
     p_ptr->i_level_idc = 21;
     p_ptr->rc.i_vbv_max_bitrate = 100; // changing these do not change 
cycles much
     p_ptr->rc.i_vbv_buffer_size = 100; // changing these do not change 
cycles much
--

Regards
Zubair Khan