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/* |
/* |
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rdesktop: A Remote Desktop Protocol client. |
rdesktop: A Remote Desktop Protocol client. |
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Sound DSP routines |
Sound DSP routines |
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Copyright (C) Michael Gernoth 2006 |
Copyright (C) Michael Gernoth 2006-2007 |
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This program is free software; you can redistribute it and/or modify |
This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
it under the terms of the GNU General Public License as published by |
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
*/ |
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#include <strings.h> |
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#include "rdesktop.h" |
#include "rdesktop.h" |
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#include "rdpsnd.h" |
#include "rdpsnd.h" |
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#include "rdpsnd_dsp.h" |
#include "rdpsnd_dsp.h" |
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} |
} |
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void |
void |
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rdpsnd_dsp_softvol(unsigned char *buffer, unsigned int size, WAVEFORMATEX * format) |
rdpsnd_dsp_softvol(unsigned char *buffer, unsigned int size, RD_WAVEFORMATEX * format) |
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{ |
{ |
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unsigned int factor_left, factor_right; |
unsigned int factor_left, factor_right; |
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unsigned char *posin = buffer; |
unsigned char *posin = buffer; |
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} |
} |
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void |
void |
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rdpsnd_dsp_swapbytes(unsigned char *buffer, unsigned int size, WAVEFORMATEX * format) |
rdpsnd_dsp_swapbytes(unsigned char *buffer, unsigned int size, RD_WAVEFORMATEX * format) |
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{ |
{ |
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int i; |
int i; |
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uint8 swap; |
uint8 swap; |
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} |
} |
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} |
} |
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BOOL |
RD_BOOL |
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rdpsnd_dsp_resample_set(uint32 device_srate, uint16 device_bitspersample, uint16 device_channels) |
rdpsnd_dsp_resample_set(uint32 device_srate, uint16 device_bitspersample, uint16 device_channels) |
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{ |
{ |
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#ifdef HAVE_LIBSAMPLERATE |
#ifdef HAVE_LIBSAMPLERATE |
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int err; |
int err; |
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#endif |
#endif |
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#ifndef HAVE_LIBSAMPLERATE |
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if (device_srate != 44100 && device_srate != 22050) |
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return False; |
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#endif |
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if (device_bitspersample != 16 && device_bitspersample != 8) |
if (device_bitspersample != 16 && device_bitspersample != 8) |
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return False; |
return False; |
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return True; |
return True; |
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} |
} |
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BOOL |
RD_BOOL |
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rdpsnd_dsp_resample_supported(WAVEFORMATEX * format) |
rdpsnd_dsp_resample_supported(RD_WAVEFORMATEX * format) |
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{ |
{ |
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if (format->wFormatTag != WAVE_FORMAT_PCM) |
if (format->wFormatTag != WAVE_FORMAT_PCM) |
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return False; |
return False; |
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return False; |
return False; |
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if ((format->wBitsPerSample != 8) && (format->wBitsPerSample != 16)) |
if ((format->wBitsPerSample != 8) && (format->wBitsPerSample != 16)) |
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return False; |
return False; |
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#ifndef HAVE_LIBSAMPLERATE |
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if ((format->nSamplesPerSec != 44100) && (format->nSamplesPerSec != 22050)) |
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return False; |
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#endif |
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return True; |
return True; |
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} |
} |
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uint32 |
uint32 |
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rdpsnd_dsp_resample(unsigned char **out, unsigned char *in, unsigned int size, |
rdpsnd_dsp_resample(unsigned char **out, unsigned char *in, unsigned int size, |
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WAVEFORMATEX * format, BOOL stream_be) |
RD_WAVEFORMATEX * format, RD_BOOL stream_be) |
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{ |
{ |
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#ifdef HAVE_LIBSAMPLERATE |
#ifdef HAVE_LIBSAMPLERATE |
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SRC_DATA resample_data; |
SRC_DATA resample_data; |
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float *infloat, *outfloat; |
float *infloat, *outfloat; |
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int innum, outnum; |
int err; |
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#else |
#else |
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int offset; |
int ratio1k = (resample_to_srate * 1000) / format->nSamplesPerSec; |
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#endif |
#endif |
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static BOOL warned = False; |
int innum, outnum; |
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unsigned char *tmpdata = NULL; |
unsigned char *tmpdata = NULL, *tmp = NULL; |
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int samplewidth = format->wBitsPerSample / 8; |
int samplewidth = format->wBitsPerSample / 8; |
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int outsize = 0; |
int outsize = 0; |
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int i; |
int i; |
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rdpsnd_dsp_swapbytes(in, size, format); |
rdpsnd_dsp_swapbytes(in, size, format); |
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#endif |
#endif |
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if (resample_to_channels != format->nChannels) |
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{ |
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int newsize = (size / format->nChannels) * resample_to_channels; |
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tmpdata = xmalloc(newsize); |
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for (i = 0; i < newsize / samplewidth; i++) |
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{ |
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if (format->nChannels > resample_to_channels) |
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memcpy(tmpdata + (i * samplewidth), |
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in + |
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(((i * format->nChannels) / resample_to_channels) * |
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samplewidth), samplewidth); |
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else |
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memcpy(tmpdata + (i * samplewidth), |
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in + |
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(((i / resample_to_channels) * format->nChannels + |
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(i % format->nChannels)) * samplewidth), samplewidth); |
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} |
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in = tmpdata; |
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size = newsize; |
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} |
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/* Expand 8bit input-samples to 16bit */ |
/* Expand 8bit input-samples to 16bit */ |
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#ifndef HAVE_LIBSAMPLERATE /* libsamplerate needs 16bit samples */ |
#ifndef HAVE_LIBSAMPLERATE /* libsamplerate needs 16bit samples */ |
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if (format->wBitsPerSample != resample_to_bitspersample) |
if (format->wBitsPerSample != resample_to_bitspersample) |
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/* source: 8 bit, dest: 16bit */ |
/* source: 8 bit, dest: 16bit */ |
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if (format->wBitsPerSample == 8) |
if (format->wBitsPerSample == 8) |
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{ |
{ |
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tmp = tmpdata; |
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tmpdata = xmalloc(size * 2); |
tmpdata = xmalloc(size * 2); |
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for (i = 0; i < size; i++) |
for (i = 0; i < size; i++) |
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{ |
{ |
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in = tmpdata; |
in = tmpdata; |
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samplewidth = 16 / 2; |
samplewidth = 16 / 2; |
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size *= 2; |
size *= 2; |
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if (tmp != NULL) |
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xfree(tmp); |
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} |
} |
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} |
} |
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if (resample_to_channels != format->nChannels) |
innum = size / samplewidth; |
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{ |
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warning("unsupported resample-settings (%u -> %u/%u -> %u/%u -> %u), not resampling!\n", format->nSamplesPerSec, resample_to_srate, format->wBitsPerSample, resample_to_bitspersample, format->nChannels, resample_to_channels); |
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warned = True; |
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} |
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/* Do the resampling */ |
/* Do the resampling */ |
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#ifdef HAVE_LIBSAMPLERATE |
#ifdef HAVE_LIBSAMPLERATE |
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return 0; |
return 0; |
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} |
} |
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innum = size / samplewidth; |
outnum = ((float) innum * ((float) resample_to_srate / (float) format->nSamplesPerSec)) + 1; |
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outnum = innum * (resample_to_srate / format->nSamplesPerSec); |
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infloat = xmalloc(sizeof(float) * innum); |
infloat = xmalloc(sizeof(float) * innum); |
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outfloat = xmalloc(sizeof(float) * outnum); |
outfloat = xmalloc(sizeof(float) * outnum); |
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resample_data.src_ratio = (double) resample_to_srate / (double) format->nSamplesPerSec; |
resample_data.src_ratio = (double) resample_to_srate / (double) format->nSamplesPerSec; |
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resample_data.end_of_input = 0; |
resample_data.end_of_input = 0; |
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src_process(src_converter, &resample_data); |
if ((err = src_process(src_converter, &resample_data)) != 0) |
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error("src_process: %s", src_strerror(err)); |
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xfree(infloat); |
xfree(infloat); |
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outsize = outnum * samplewidth; |
outsize = resample_data.output_frames_gen * resample_to_channels * samplewidth; |
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*out = xmalloc(outsize); |
*out = xmalloc(outsize); |
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src_float_to_short_array(outfloat, (short *) *out, outnum); |
src_float_to_short_array(outfloat, (short *) *out, |
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resample_data.output_frames_gen * resample_to_channels); |
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xfree(outfloat); |
xfree(outfloat); |
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#else |
#else |
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if (format->nSamplesPerSec != 22050) |
/* Michaels simple linear resampler */ |
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if (resample_to_srate < format->nSamplesPerSec) |
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{ |
{ |
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if (!warned) |
warning("downsampling currently not supported!\n"); |
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{ |
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warning("unsupported source samplerate (%u), not resampling!\n", |
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format->nSamplesPerSec); |
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warned = True; |
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} |
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return 0; |
return 0; |
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} |
} |
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outsize = size * 2; |
outnum = (innum * ratio1k) / 1000; |
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outsize = outnum * samplewidth; |
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*out = xmalloc(outsize); |
*out = xmalloc(outsize); |
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bzero(*out, outsize); |
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/* Resample from 22050 to 44100 */ |
for (i = 0; i < outsize / (resample_to_channels * samplewidth); i++) |
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for (i = 0; i < (size / samplewidth); i++) |
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{ |
{ |
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/* On a stereo-channel we must make sure that left and right |
int source = (i * 1000) / ratio1k; |
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does not get mixed up, so we need to expand the sample- |
#if 0 /* Partial for linear resampler */ |
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data with channels in mind: 1234 -> 12123434 |
int part = (i * 100000) / ratio1k - source * 100; |
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If we have a mono-channel, we can expand the data by simply |
#endif |
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doubling the sample-data: 1234 -> 11223344 */ |
int j; |
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if (resample_to_channels == 2) |
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offset = ((i * 2) - (i & 1)) * samplewidth; |
if (source * resample_to_channels + samplewidth > size) |
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break; |
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#if 0 /* Linear resampling, TODO: soundquality fixes (LP filter) */ |
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if (samplewidth == 1) |
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{ |
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sint8 cval1, cval2; |
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for (j = 0; j < resample_to_channels; j++) |
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{ |
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memcpy(&cval1, |
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in + (source * resample_to_channels * samplewidth) + |
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(samplewidth * j), samplewidth); |
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memcpy(&cval2, |
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in + ((source + 1) * resample_to_channels * samplewidth) + |
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(samplewidth * j), samplewidth); |
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cval1 += (sint8) (cval2 * part) / 100; |
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memcpy(*out + (i * resample_to_channels * samplewidth) + |
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(samplewidth * j), &cval1, samplewidth); |
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} |
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} |
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else |
else |
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offset = (i * 2) * samplewidth; |
{ |
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sint16 sval1, sval2; |
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for (j = 0; j < resample_to_channels; j++) |
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{ |
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memcpy(&sval1, |
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in + (source * resample_to_channels * samplewidth) + |
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(samplewidth * j), samplewidth); |
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memcpy(&sval2, |
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in + ((source + 1) * resample_to_channels * samplewidth) + |
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(samplewidth * j), samplewidth); |
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memcpy(*out + offset, in + (i * samplewidth), samplewidth); |
sval1 += (sint16) (sval2 * part) / 100; |
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memcpy(*out + (resample_to_channels * samplewidth + offset), |
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in + (i * samplewidth), samplewidth); |
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memcpy(*out + (i * resample_to_channels * samplewidth) + |
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(samplewidth * j), &sval1, samplewidth); |
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} |
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} |
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#else /* Nearest neighbor search */ |
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for (j = 0; j < resample_to_channels; j++) |
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{ |
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memcpy(*out + (i * resample_to_channels * samplewidth) + (samplewidth * j), |
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in + (source * resample_to_channels * samplewidth) + |
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(samplewidth * j), samplewidth); |
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} |
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#endif |
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} |
} |
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outsize = i * resample_to_channels * samplewidth; |
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#endif |
#endif |
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if (tmpdata != NULL) |
if (tmpdata != NULL) |
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} |
} |
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STREAM |
STREAM |
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rdpsnd_dsp_process(STREAM s, struct audio_driver * current_driver, WAVEFORMATEX * format) |
rdpsnd_dsp_process(unsigned char *data, unsigned int size, struct audio_driver * current_driver, |
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RD_WAVEFORMATEX * format) |
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{ |
{ |
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static struct stream out; |
static struct stream out; |
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BOOL stream_be = False; |
RD_BOOL stream_be = False; |
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/* softvol and byteswap do not change the amount of data they |
/* softvol and byteswap do not change the amount of data they |
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return, so they can operate on the input-stream */ |
return, so they can operate on the input-stream */ |
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if (current_driver->wave_out_volume == rdpsnd_dsp_softvol_set) |
if (current_driver->wave_out_volume == rdpsnd_dsp_softvol_set) |
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rdpsnd_dsp_softvol(s->data, s->size, format); |
rdpsnd_dsp_softvol(data, size, format); |
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#ifdef B_ENDIAN |
#ifdef B_ENDIAN |
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if (current_driver->need_byteswap_on_be) |
if (current_driver->need_byteswap_on_be) |
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{ |
{ |
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rdpsnd_dsp_swapbytes(s->data, s->size, format); |
rdpsnd_dsp_swapbytes(data, size, format); |
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stream_be = True; |
stream_be = True; |
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} |
} |
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#endif |
#endif |
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out.data = NULL; |
out.data = NULL; |
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if (current_driver->need_resampling) |
if (current_driver->need_resampling) |
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out.size = rdpsnd_dsp_resample(&out.data, s->data, s->size, format, stream_be); |
out.size = rdpsnd_dsp_resample(&out.data, data, size, format, stream_be); |
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if (out.data == NULL) |
if (out.data == NULL) |
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{ |
{ |
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out.data = xmalloc(s->size); |
out.data = xmalloc(size); |
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memcpy(out.data, s->data, s->size); |
memcpy(out.data, data, size); |
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out.size = s->size; |
out.size = size; |
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} |
} |
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out.p = out.data; |
out.p = out.data; |