mirror of
https://github.com/cookiengineer/audacity
synced 2025-10-31 14:13:50 +01:00
5e0efd1a25
Using LAME 3.10 Windows project files substantially changed from original, and included into audacity solution.
185 lines
8.0 KiB
C
185 lines
8.0 KiB
C
#ifndef LAME_GLOBAL_FLAGS_H
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#define LAME_GLOBAL_FLAGS_H
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#ifndef lame_internal_flags_defined
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#define lame_internal_flags_defined
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struct lame_internal_flags;
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typedef struct lame_internal_flags lame_internal_flags;
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#endif
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typedef enum short_block_e {
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short_block_not_set = -1, /* allow LAME to decide */
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short_block_allowed = 0, /* LAME may use them, even different block types for L/R */
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short_block_coupled, /* LAME may use them, but always same block types in L/R */
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short_block_dispensed, /* LAME will not use short blocks, long blocks only */
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short_block_forced /* LAME will not use long blocks, short blocks only */
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} short_block_t;
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/***********************************************************************
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*
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* Control Parameters set by User. These parameters are here for
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* backwards compatibility with the old, non-shared lib API.
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* Please use the lame_set_variablename() functions below
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*
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*
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***********************************************************************/
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struct lame_global_struct {
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unsigned int class_id;
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/* input description */
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unsigned long num_samples; /* number of samples. default=2^32-1 */
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int num_channels; /* input number of channels. default=2 */
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int samplerate_in; /* input_samp_rate in Hz. default=44.1 kHz */
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int samplerate_out; /* output_samp_rate.
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default: LAME picks best value
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at least not used for MP3 decoding:
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Remember 44.1 kHz MP3s and AC97 */
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float scale; /* scale input by this amount before encoding
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at least not used for MP3 decoding */
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float scale_left; /* scale input of channel 0 (left) by this
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amount before encoding */
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float scale_right; /* scale input of channel 1 (right) by this
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amount before encoding */
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/* general control params */
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int analysis; /* collect data for a MP3 frame analyzer? */
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int write_lame_tag; /* add Xing VBR tag? */
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int decode_only; /* use lame/mpglib to convert mp3 to wav */
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int quality; /* quality setting 0=best, 9=worst default=5 */
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MPEG_mode mode; /* see enum in lame.h
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default = LAME picks best value */
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int force_ms; /* force M/S mode. requires mode=1 */
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int free_format; /* use free format? default=0 */
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int findReplayGain; /* find the RG value? default=0 */
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int decode_on_the_fly; /* decode on the fly? default=0 */
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int write_id3tag_automatic; /* 1 (default) writes ID3 tags, 0 not */
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int nogap_total;
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int nogap_current;
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int substep_shaping;
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int noise_shaping;
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int subblock_gain; /* 0 = no, 1 = yes */
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int use_best_huffman; /* 0 = no. 1=outside loop 2=inside loop(slow) */
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/*
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* set either brate>0 or compression_ratio>0, LAME will compute
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* the value of the variable not set.
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* Default is compression_ratio = 11.025
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*/
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int brate; /* bitrate */
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float compression_ratio; /* sizeof(wav file)/sizeof(mp3 file) */
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/* frame params */
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int copyright; /* mark as copyright. default=0 */
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int original; /* mark as original. default=1 */
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int extension; /* the MP3 'private extension' bit.
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Meaningless */
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int emphasis; /* Input PCM is emphased PCM (for
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instance from one of the rarely
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emphased CDs), it is STRONGLY not
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recommended to use this, because
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psycho does not take it into account,
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and last but not least many decoders
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don't care about these bits */
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int error_protection; /* use 2 bytes per frame for a CRC
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checksum. default=0 */
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int strict_ISO; /* enforce ISO spec as much as possible */
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int disable_reservoir; /* use bit reservoir? */
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/* quantization/noise shaping */
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int quant_comp;
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int quant_comp_short;
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int experimentalY;
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int experimentalZ;
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int exp_nspsytune;
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int preset;
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/* VBR control */
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vbr_mode VBR;
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float VBR_q_frac; /* Range [0,...,1[ */
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int VBR_q; /* Range [0,...,9] */
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int VBR_mean_bitrate_kbps;
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int VBR_min_bitrate_kbps;
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int VBR_max_bitrate_kbps;
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int VBR_hard_min; /* strictly enforce VBR_min_bitrate
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normaly, it will be violated for analog
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silence */
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/* resampling and filtering */
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int lowpassfreq; /* freq in Hz. 0=lame choses.
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-1=no filter */
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int highpassfreq; /* freq in Hz. 0=lame choses.
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-1=no filter */
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int lowpasswidth; /* freq width of filter, in Hz
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(default=15%) */
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int highpasswidth; /* freq width of filter, in Hz
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(default=15%) */
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/*
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* psycho acoustics and other arguments which you should not change
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* unless you know what you are doing
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*/
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float maskingadjust;
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float maskingadjust_short;
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int ATHonly; /* only use ATH */
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int ATHshort; /* only use ATH for short blocks */
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int noATH; /* disable ATH */
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int ATHtype; /* select ATH formula */
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float ATHcurve; /* change ATH formula 4 shape */
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float ATH_lower_db; /* lower ATH by this many db */
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int athaa_type; /* select ATH auto-adjust scheme */
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float athaa_sensitivity; /* dB, tune active region of auto-level */
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short_block_t short_blocks;
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int useTemporal; /* use temporal masking effect */
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float interChRatio;
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float msfix; /* Naoki's adjustment of Mid/Side maskings */
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int tune; /* 0 off, 1 on */
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float tune_value_a; /* used to pass values for debugging and stuff */
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float attackthre; /* attack threshold for L/R/M channel */
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float attackthre_s; /* attack threshold for S channel */
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struct {
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void (*msgf) (const char *format, va_list ap);
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void (*debugf) (const char *format, va_list ap);
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void (*errorf) (const char *format, va_list ap);
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} report;
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/************************************************************************/
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/* internal variables, do not set... */
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/* provided because they may be of use to calling application */
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/************************************************************************/
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int lame_allocated_gfp; /* is this struct owned by calling
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program or lame? */
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/**************************************************************************/
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/* more internal variables are stored in this structure: */
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/**************************************************************************/
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lame_internal_flags *internal_flags;
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struct {
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int mmx;
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int amd3dnow;
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int sse;
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} asm_optimizations;
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};
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int is_lame_global_flags_valid(const lame_global_flags * gfp);
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#endif /* LAME_GLOBAL_FLAGS_H */
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