FFmpeg: hdcd_state Struct Reference

control is the active control code, where bit 0-3: target_gain, 4-bit (3.1) fixed-point value bit 4 : peak_extend bit 5 : transient_filter bit 6,7: always zero

Definition at line 850 of file af_hdcd.c.

Referenced by hdcd_integrate(), and hdcd_reset().

uint8_t hdcd_state::control

Definition at line 850 of file af_hdcd.c.

Referenced by hdcd_control(), hdcd_integrate(), hdcd_reset(), and hdcd_scan().

unsigned int hdcd_state::sustain

Definition at line 851 of file af_hdcd.c.

Referenced by hdcd_detect_onech(), hdcd_process(), hdcd_process_stereo(), hdcd_reset(), and hdcd_scan().

unsigned int hdcd_state::sustain_reset

code detect timer

Definition at line 851 of file af_hdcd.c.

Referenced by config_input(), hdcd_reset(), and hdcd_scan().

int hdcd_state::running_gain

11-bit (3.8) fixed point, extended from target_gain

Definition at line 853 of file af_hdcd.c.

Referenced by hdcd_process(), hdcd_process_stereo(), and hdcd_reset().

int hdcd_state::code_counterA

8-bit format packet

Definition at line 856 of file af_hdcd.c.

Referenced by hdcd_detect_onech(), hdcd_integrate(), hdcd_reset(), and uninit().

int hdcd_state::code_counterA_almost

looks like an A code, but a bit expected to be 0 is 1

Definition at line 857 of file af_hdcd.c.

Referenced by hdcd_detect_onech(), hdcd_integrate(), hdcd_reset(), and uninit().

int hdcd_state::code_counterB

16-bit format packet, 8-bit code, 8-bit XOR of code

Definition at line 858 of file af_hdcd.c.

Referenced by hdcd_detect_onech(), hdcd_integrate(), hdcd_reset(), and uninit().

int hdcd_state::code_counterB_checkfails

looks like a B code, but doesn't pass the XOR check

Definition at line 859 of file af_hdcd.c.

Referenced by hdcd_detect_onech(), hdcd_integrate(), hdcd_reset(), and uninit().

int hdcd_state::code_counterC

packet prefix was found, expect a code

Definition at line 860 of file af_hdcd.c.

Referenced by hdcd_integrate(), hdcd_reset(), and uninit().

int hdcd_state::code_counterC_unmatched

told to look for a code, but didn't find one

Definition at line 861 of file af_hdcd.c.

Referenced by hdcd_detect_onech(), hdcd_reset(), and uninit().

int hdcd_state::count_peak_extend

valid packets where peak_extend was enabled

Definition at line 862 of file af_hdcd.c.

Referenced by hdcd_detect_onech(), hdcd_integrate(), hdcd_reset(), and uninit().

int hdcd_state::count_transient_filter

valid packets where filter was detected

Definition at line 863 of file af_hdcd.c.

Referenced by hdcd_detect_onech(), hdcd_integrate(), hdcd_reset(), and uninit().

int hdcd_state::gain_counts[16]

target_gain is a 4-bit (3.1) fixed-point value, always negative, but stored positive.

The 16 possible values range from -7.5 to 0.0 dB in steps of 0.5, but no value below -6.0 dB should appear.

Definition at line 868 of file af_hdcd.c.

Referenced by hdcd_integrate(), hdcd_reset(), and uninit().

int hdcd_state::max_gain

Definition at line 869 of file af_hdcd.c.

Referenced by hdcd_detect_onech(), hdcd_integrate(), hdcd_reset(), and uninit().

int hdcd_state::count_sustain_expired

occurrences of code detect timer expiring without detecting a code.

-1 for timer never set.

Definition at line 872 of file af_hdcd.c.

Referenced by hdcd_detect_onech(), hdcd_reset(), hdcd_scan(), and uninit().

int hdcd_state::rate

sampling rate

Definition at line 874 of file af_hdcd.c.

Referenced by hdcd_analyze_prepare(), and hdcd_reset().

int hdcd_state::_ana_snb

used in the analyze mode tone generator

Definition at line 875 of file af_hdcd.c.

Referenced by hdcd_analyze_prepare(), and hdcd_reset().

The documentation for this struct was generated from the following file:

libavfilter/af_hdcd.c

Generated on Fri Jan 12 2018 01:48:32 for FFmpeg by doxygen 1.8.6