Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1905 | serge | 1 | /* |
| 2 | synth_8bit.h: Wrappers over optimized synth_xtoy for converting signed short to 8bit. |
||
| 3 | |||
| 4 | copyright 1995-2008 by the mpg123 project - free software under the terms of the LGPL 2.1 |
||
| 5 | see COPYING and AUTHORS files in distribution or http://mpg123.org |
||
| 6 | initially written by Michael Hipp, code generalized to the wrapper by Thomas Orgis |
||
| 7 | |||
| 8 | Only variable is the BLOCK size to choose 1to1, 2to1 or 4to1. |
||
| 9 | Oh, and the names: BASE_SYNTH_NAME, SYNTH_NAME, MONO_NAME, MONO2STEREO_NAME |
||
| 10 | (p.ex. opt_synth_1to1(fr), synth_1to1_8bit, synth_1to1_8bit_mono, ...). |
||
| 11 | */ |
||
| 12 | |||
| 13 | int SYNTH_NAME(real *bandPtr, int channel, mpg123_handle *fr, int final) |
||
| 14 | { |
||
| 15 | short samples_tmp[BLOCK]; |
||
| 16 | short *tmp1 = samples_tmp + channel; |
||
| 17 | int i,ret; |
||
| 18 | |||
| 19 | unsigned char *samples = fr->buffer.data; |
||
| 20 | int pnt = fr->buffer.fill; |
||
| 21 | fr->buffer.data = (unsigned char*) samples_tmp; |
||
| 22 | fr->buffer.fill = 0; |
||
| 23 | ret = BASE_SYNTH_NAME(bandPtr, channel, fr , 0); |
||
| 24 | fr->buffer.data = samples; |
||
| 25 | |||
| 26 | samples += channel + pnt; |
||
| 27 | for(i=0;i<(BLOCK/2);i++) |
||
| 28 | { |
||
| 29 | *samples = fr->conv16to8[*tmp1>>AUSHIFT]; |
||
| 30 | samples += 2; |
||
| 31 | tmp1 += 2; |
||
| 32 | } |
||
| 33 | fr->buffer.fill = pnt + (final ? BLOCK : 0 ); |
||
| 34 | |||
| 35 | return ret; |
||
| 36 | } |
||
| 37 | |||
| 38 | int MONO_NAME(real *bandPtr, mpg123_handle *fr) |
||
| 39 | { |
||
| 40 | short samples_tmp[BLOCK]; |
||
| 41 | short *tmp1 = samples_tmp; |
||
| 42 | int i,ret; |
||
| 43 | |||
| 44 | unsigned char *samples = fr->buffer.data; |
||
| 45 | int pnt = fr->buffer.fill; |
||
| 46 | fr->buffer.data = (unsigned char*) samples_tmp; |
||
| 47 | fr->buffer.fill = 0; |
||
| 48 | ret = BASE_SYNTH_NAME(bandPtr, 0, fr, 0); |
||
| 49 | fr->buffer.data = samples; |
||
| 50 | |||
| 51 | samples += pnt; |
||
| 52 | for(i=0;i<(BLOCK/2);i++) |
||
| 53 | { |
||
| 54 | *samples++ = fr->conv16to8[*tmp1>>AUSHIFT]; |
||
| 55 | tmp1+=2; |
||
| 56 | } |
||
| 57 | fr->buffer.fill = pnt + BLOCK/2; |
||
| 58 | |||
| 59 | return ret; |
||
| 60 | } |
||
| 61 | |||
| 62 | int MONO2STEREO_NAME(real *bandPtr, mpg123_handle *fr) |
||
| 63 | { |
||
| 64 | short samples_tmp[BLOCK]; |
||
| 65 | short *tmp1 = samples_tmp; |
||
| 66 | int i,ret; |
||
| 67 | |||
| 68 | unsigned char *samples = fr->buffer.data; |
||
| 69 | int pnt = fr->buffer.fill; |
||
| 70 | fr->buffer.data = (unsigned char*) samples_tmp; |
||
| 71 | fr->buffer.fill = 0; |
||
| 72 | ret = BASE_SYNTH_NAME(bandPtr, 0, fr, 0); |
||
| 73 | fr->buffer.data = samples; |
||
| 74 | |||
| 75 | samples += pnt; |
||
| 76 | for(i=0;i<(BLOCK/2);i++) |
||
| 77 | { |
||
| 78 | *samples++ = fr->conv16to8[*tmp1>>AUSHIFT]; |
||
| 79 | *samples++ = fr->conv16to8[*tmp1>>AUSHIFT]; |
||
| 80 | tmp1 += 2; |
||
| 81 | } |
||
| 82 | fr->buffer.fill = pnt + BLOCK; |
||
| 83 | |||
| 84 | return ret; |
||
| 85 | } |
||
| 86 |