From 8fadb4940c9fcbde6a00b2b78badfcb1269382ba Mon Sep 17 00:00:00 2001 From: "Matthias P. Braendli" Date: Fri, 25 Apr 2014 11:19:11 +0200 Subject: Use new zmq message format version 1 --- src/utils.h | 31 ++++++++++++++++++++++++++++++- 1 file changed, 30 insertions(+), 1 deletion(-) (limited to 'src/utils.h') diff --git a/src/utils.h b/src/utils.h index c7ddc1e..aa8dc8a 100644 --- a/src/utils.h +++ b/src/utils.h @@ -2,6 +2,7 @@ #define UTILS_H_ #include +#include #define MIN(a,b) (((a)<(b))?(a):(b)) #define MAX(a,b) (((a)>(b))?(a):(b)) @@ -10,8 +11,36 @@ #define linear_to_dB(x) (log10(x) * 20) - +/* Calculate the little string containing a bargraph + * 'VU-meter' from the peak value measured + */ const char* level(int channel, int* peak); +/* This defines the on-wire representation of a ZMQ message header. + * + * The data follows right after this header */ +struct zmq_frame_header_t +{ + uint16_t version; // we support version=1 now + uint16_t encoder; // see ZMQ_ENCODER_XYZ + + /* length of the 'data' field */ + uint32_t datasize; + + /* Audio level, peak, linear PCM */ + int16_t audiolevel_left; + int16_t audiolevel_right; + + /* Data follows this header */ +} __attribute__ ((packed)); + +#define ZMQ_ENCODER_FDK 1 + +/* The expected frame size incl data of the given frame */ +#define ZMQ_FRAME_SIZE(f) (sizeof(zmq_frame_header_t) + f->datasize) + +#define ZMQ_FRAME_DATA(f) ( ((uint8_t*)f)+sizeof(zmq_frame_header_t) ) + + #endif -- cgit v1.2.3