check_wav.h

   1 /* Copyright (C) 2012 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
   2
   3 /** \file check_wav.h Detect, process and cut a wav header. */
   4
   5 struct check_wav_context;
   6
   7 /**
   8  * These come from the command line arguments.
   9  *
  10  * Different users of the check_wav API have different arg_info structs,
  11  * so we need a universal variant for these.
  12  */
  13 struct wav_params {
  14         /** Number of channels, or the default value. */
  15         int channels_arg;
  16         /** Whether the channel count was given. */
  17         int channels_given;
  18         /** Same semantics as \a channels_count. */
  19         int sample_rate_arg;
  20         /** Whether the sample rate was given. */
  21         int sample_rate_given;
  22         /** Same semantics as \a sample_rate. */
  23         int sample_format_arg;
  24         /** Whether the sample format was given. */
  25         int sample_format_given;
  26 };
  27
  28 #define LLS_COPY_WAV_PARMS(_dst, _pfx, _lpr) \
  29         (_dst)->channels_given = lls_opt_given(lls_opt_result( \
  30                 _pfx ## _OPT_CHANNELS, (_lpr))); \
  31         (_dst)->sample_rate_given = lls_opt_given(lls_opt_result( \
  32                 _pfx ## _OPT_SAMPLE_RATE, (_lpr))); \
  33         (_dst)->sample_format_given = lls_opt_given(lls_opt_result( \
  34                 _pfx ## _OPT_SAMPLE_FORMAT, (_lpr))); \
  35         (_dst)->channels_arg = lls_uint32_val(0, lls_opt_result( \
  36                 _pfx ## _OPT_CHANNELS, (_lpr))); \
  37         (_dst)->sample_rate_arg = lls_uint32_val(0, lls_opt_result( \
  38                 _pfx ## _OPT_SAMPLE_RATE, (_lpr))); \
  39         (_dst)->sample_format_arg = lls_uint32_val(0, lls_opt_result( \
  40                 _pfx ## _OPT_SAMPLE_FORMAT, (_lpr)));
  41
  42 struct check_wav_context *check_wav_init(struct btr_node *parent,
  43                 struct btr_node *child, struct wav_params *params,
  44                 struct btr_node **cw_btrn);
  45 void check_wav_pre_select(struct sched *s, struct check_wav_context *cwc);
  46 int check_wav_post_select(struct check_wav_context *cwc);
  47 void check_wav_shutdown(struct check_wav_context *cwc);