typedef struct
{
+ int chan_map[10][2][8];
+ int inv_chan_map[10][2][8];
+} hb_chan_map_t;
+
+typedef struct
+{
int mode_in;
int mode_out;
int nchans_in;
int nchans_out;
hb_sample_t matrix[8][8];
+ int matrix_initialized;
hb_sample_t clev;
hb_sample_t slev;
hb_sample_t level;
hb_sample_t bias;
+ hb_chan_map_t map_in;
+ hb_chan_map_t map_out;
+
+ int center;
+ int left_surround;
+ int right_surround;
+ int rear_left_surround;
+ int rear_right_surround;
} 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];
+extern hb_chan_map_t hb_smpte_chan_map;
+extern hb_chan_map_t hb_ac3_chan_map;
+extern hb_chan_map_t hb_qt_chan_map;
hb_downmix_t * hb_downmix_init(int layout, int mixdown);
void hb_downmix_close( hb_downmix_t **downmix );
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_set_chan_map(
+ hb_downmix_t * downmix,
+ hb_chan_map_t * map_in,
+ hb_chan_map_t * map_out );
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 );
+void hb_layout_remap(
+ hb_chan_map_t * map_in,
+ hb_chan_map_t * map_out,
+ int layout,
+ hb_sample_t * samples,
+ int nsamples );
int hb_need_downmix( int layout, int mixdown );
#endif /* DOWNMIX_H */