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Diffstat (limited to 'libhb/downmix.h')
| -rw-r--r-- | libhb/downmix.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/libhb/downmix.h b/libhb/downmix.h new file mode 100644 index 000000000..f9710488b --- /dev/null +++ b/libhb/downmix.h @@ -0,0 +1,41 @@ +/* $Id: downmix.h,v 1.51 2005/11/04 13:09:40 stebbins Exp $ + + This file is part of the HandBrake source code. + Homepage: <http://handbrake.fr/>. + It may be used under the terms of the GNU General Public License. */ + +#ifndef DOWNMIX_H +#define DOWNMIX_H + +typedef float hb_sample_t; + +typedef struct +{ + int mode_in; + int mode_out; + int nchans_in; + int nchans_out; + hb_sample_t matrix[8][8]; + hb_sample_t clev; + hb_sample_t slev; + hb_sample_t level; + hb_sample_t bias; +} hb_downmix_t; + +// For convenience, a map to convert smpte channel layout +// to QuickTime channel layout. +// Map Indicies are mode, lfe, channel respectively +extern int hb_smpte_chan_map[10][2][8]; +extern int hb_ac3_chan_map[10][2][8]; + +hb_downmix_t * hb_downmix_init(int layout, int mixdown); +void hb_downmix_close( hb_downmix_t **downmix ); +int hb_downmix_set_mode( hb_downmix_t * downmix, int layout, int mixdown ); +void hb_downmix_set_level( hb_downmix_t * downmix, hb_sample_t clev, hb_sample_t slev, hb_sample_t level ); +void hb_downmix_adjust_level( hb_downmix_t * downmix ); +void hb_downmix_set_bias( hb_downmix_t * downmix, hb_sample_t bias ); +void hb_downmix( hb_downmix_t * downmix, hb_sample_t * dst, hb_sample_t * src, int nsamples); +void hb_layout_remap( int (*layouts)[2][8], hb_sample_t * samples, int layout, int nsamples ); +int hb_need_downmix( int layout, int mixdown ); + +#endif /* DOWNMIX_H */ |