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/* |
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rdesktop: A Remote Desktop Protocol client. |
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Sound Channel Process Functions - SGI/IRIX |
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Copyright (C) Matthew Chapman 2003 |
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Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003 |
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Copyright (C) Jeremy Meng voidfoo@cwazy.co.uk 2004 |
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|
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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 |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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|
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#include "rdesktop.h" |
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#include <errno.h> |
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#include <dmedia/audio.h> |
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|
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#define IRIX_DEBUG 1 |
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|
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#define IRIX_MAX_VOL 65535 |
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|
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#define MAX_QUEUE 10 |
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|
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int g_dsp_fd; |
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ALconfig audioconfig; |
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ALport output_port; |
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|
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BOOL g_dsp_busy = False; |
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static BOOL g_swapaudio; |
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static int g_snd_rate; |
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static BOOL g_swapaudio; |
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static short g_samplewidth; |
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static int width = AL_SAMPLE_16; |
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|
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double min_volume, max_volume, volume_range; |
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int resource, maxFillable; |
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int combinedFrameSize; |
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|
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static struct audio_packet |
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{ |
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struct stream s; |
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uint16 tick; |
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uint8 index; |
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} packet_queue[MAX_QUEUE]; |
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static unsigned int queue_hi, queue_lo; |
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|
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BOOL |
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wave_out_open(void) |
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{ |
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ALparamInfo pinfo; |
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|
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#if (defined(IRIX_DEBUG)) |
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fprintf(stderr, "wave_out_open: begin\n"); |
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#endif |
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|
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if (alGetParamInfo(AL_DEFAULT_OUTPUT, AL_GAIN, &pinfo) < 0) |
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{ |
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fprintf(stderr, "wave_out_open: alGetParamInfo failed: %s\n", |
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alGetErrorString(oserror())); |
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} |
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min_volume = alFixedToDouble(pinfo.min.ll); |
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max_volume = alFixedToDouble(pinfo.max.ll); |
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volume_range = (max_volume - min_volume); |
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#if (defined(IRIX_DEBUG)) |
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fprintf(stderr, "wave_out_open: minvol = %lf, maxvol= %lf, range = %lf.\n", |
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min_volume, max_volume, volume_range); |
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#endif |
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|
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queue_lo = queue_hi = 0; |
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|
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audioconfig = alNewConfig(); |
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if (audioconfig < 0) |
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{ |
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fprintf(stderr, "wave_out_open: alNewConfig failed: %s\n", |
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alGetErrorString(oserror())); |
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return False; |
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} |
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|
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output_port = alOpenPort("rdpsnd", "w", 0); |
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if (output_port == (ALport) 0) |
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{ |
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fprintf(stderr, "wave_out_open: alOpenPort failed: %s\n", |
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alGetErrorString(oserror())); |
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return False; |
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} |
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|
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#if (defined(IRIX_DEBUG)) |
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fprintf(stderr, "wave_out_open: returning\n"); |
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#endif |
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return True; |
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} |
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|
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void |
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wave_out_close(void) |
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{ |
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/* Ack all remaining packets */ |
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#if (defined(IRIX_DEBUG)) |
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fprintf(stderr, "wave_out_close: begin\n"); |
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#endif |
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|
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while (queue_lo != queue_hi) |
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{ |
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rdpsnd_send_completion(packet_queue[queue_lo].tick, packet_queue[queue_lo].index); |
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free(packet_queue[queue_lo].s.data); |
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queue_lo = (queue_lo + 1) % MAX_QUEUE; |
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} |
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alDiscardFrames(output_port, 0); |
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|
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alClosePort(output_port); |
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alFreeConfig(audioconfig); |
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#if (defined(IRIX_DEBUG)) |
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fprintf(stderr, "wave_out_close: returning\n"); |
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#endif |
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} |
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|
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BOOL |
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wave_out_format_supported(WAVEFORMATEX * pwfx) |
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{ |
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if (pwfx->wFormatTag != WAVE_FORMAT_PCM) |
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return False; |
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if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2)) |
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return False; |
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if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16)) |
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return False; |
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|
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return True; |
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} |
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|
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BOOL |
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wave_out_set_format(WAVEFORMATEX * pwfx) |
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{ |
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int channels; |
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int frameSize, channelCount; |
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ALpv params; |
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|
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#if (defined(IRIX_DEBUG)) |
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fprintf(stderr, "wave_out_set_format: init...\n"); |
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#endif |
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/* limited support to configure an opened audio port in IRIX */ |
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/* have to reopen the audio port, using same config */ |
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alClosePort(output_port); |
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|
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g_swapaudio = False; |
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|
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if (pwfx->wBitsPerSample == 8) |
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width = AL_SAMPLE_8; |
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else if (pwfx->wBitsPerSample == 16) |
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{ |
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width = AL_SAMPLE_16; |
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/* Do we need to swap the 16bit values? (Are we BigEndian) */ |
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#if (defined(IRIX_DEBUG)) |
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g_swapaudio = 1; |
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#else |
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g_swapaudio = 0; |
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#endif |
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} |
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|
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g_samplewidth = pwfx->wBitsPerSample / 8; |
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channels = pwfx->nChannels; |
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g_snd_rate = pwfx->nSamplesPerSec; |
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|
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alSetSampFmt(audioconfig, AL_SAMPFMT_TWOSCOMP); |
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alSetWidth(audioconfig, width); |
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alSetChannels(audioconfig, channels); |
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|
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output_port = alOpenPort("rdpsnd", "w", audioconfig); |
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|
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if (output_port == (ALport) 0) |
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{ |
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fprintf(stderr, "wave_out_set_format: alOpenPort failed: %s\n", |
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alGetErrorString(oserror())); |
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return False; |
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} |
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|
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resource = alGetResource(output_port); |
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maxFillable = alGetFillable(output_port); |
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channelCount = alGetChannels(audioconfig); |
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frameSize = alGetWidth(audioconfig); |
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|
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if (frameSize == 0 || channelCount == 0) |
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{ |
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fprintf(stderr, "wave_out_set_format: bad frameSize or channelCount\n"); |
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return False; |
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} |
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combinedFrameSize = frameSize * channelCount; |
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|
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params.param = AL_RATE; |
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params.value.ll = (long long) g_snd_rate << 32; |
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|
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if (alSetParams(resource, ¶ms, 1) < 0) |
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{ |
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fprintf(stderr, "wave_set_format: alSetParams failed: %s\n", |
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alGetErrorString(oserror())); |
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return False; |
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} |
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if (params.sizeOut < 0) |
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{ |
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fprintf(stderr, "wave_set_format: invalid rate %d\n", g_snd_rate); |
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return False; |
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} |
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|
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#if (defined(IRIX_DEBUG)) |
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fprintf(stderr, "wave_out_set_format: returning...\n"); |
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#endif |
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return True; |
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} |
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|
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void |
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wave_out_volume(uint16 left, uint16 right) |
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{ |
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double gainleft, gainright; |
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ALpv pv[1]; |
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ALfixed gain[8]; |
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|
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#if (defined(IRIX_DEBUG)) |
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fprintf(stderr, "wave_out_volume: begin\n"); |
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fprintf(stderr, "left='%d', right='%d'\n", left, right); |
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#endif |
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|
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gainleft = (double) left / IRIX_MAX_VOL; |
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gainright = (double) right / IRIX_MAX_VOL; |
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|
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gain[0] = alDoubleToFixed(min_volume + gainleft * volume_range); |
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gain[1] = alDoubleToFixed(min_volume + gainright * volume_range); |
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|
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pv[0].param = AL_GAIN; |
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pv[0].value.ptr = gain; |
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pv[0].sizeIn = 8; |
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if (alSetParams(AL_DEFAULT_OUTPUT, pv, 1) < 0) |
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{ |
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fprintf(stderr, "wave_out_volume: alSetParams failed: %s\n", |
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alGetErrorString(oserror())); |
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return; |
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} |
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|
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#if (defined(IRIX_DEBUG)) |
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fprintf(stderr, "wave_out_volume: returning\n"); |
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#endif |
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} |
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|
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void |
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wave_out_write(STREAM s, uint16 tick, uint8 index) |
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{ |
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struct audio_packet *packet = &packet_queue[queue_hi]; |
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unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE; |
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|
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if (next_hi == queue_lo) |
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{ |
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fprintf(stderr, "No space to queue audio packet\n"); |
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return; |
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} |
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|
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queue_hi = next_hi; |
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|
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packet->s = *s; |
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packet->tick = tick; |
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packet->index = index; |
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packet->s.p += 4; |
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|
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/* we steal the data buffer from s, give it a new one */ |
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s->data = malloc(s->size); |
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|
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if (!g_dsp_busy) |
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wave_out_play(); |
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} |
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|
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void |
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wave_out_play(void) |
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{ |
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struct audio_packet *packet; |
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ssize_t len; |
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unsigned int i; |
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uint8 swap; |
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STREAM out; |
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static long startedat_us; |
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static long startedat_s; |
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static BOOL started = False; |
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static BOOL swapped = False; |
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struct timeval tv; |
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int gf; |
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static long long temp; |
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|
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while (1) |
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{ |
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if (queue_lo == queue_hi) |
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{ |
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g_dsp_busy = False; |
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return; |
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} |
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|
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packet = &packet_queue[queue_lo]; |
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out = &packet->s; |
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|
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/* Swap the current packet, but only once */ |
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if (g_swapaudio && !swapped) |
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{ |
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for (i = 0; i < out->end - out->p; i += 2) |
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{ |
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swap = *(out->p + i); |
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*(out->p + i) = *(out->p + i + 1); |
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*(out->p + i + 1) = swap; |
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} |
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swapped = True; |
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} |
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|
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if (!started) |
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{ |
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gettimeofday(&tv, NULL); |
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startedat_us = tv.tv_usec; |
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startedat_s = tv.tv_sec; |
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started = True; |
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} |
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|
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len = out->end - out->p; |
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gf = alGetFillable(output_port); |
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if (len > gf) |
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{ |
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/* len = gf * combinedFrameSize; */ |
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#if (defined(IRIX_DEBUG)) |
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/* fprintf(stderr,"Fillable...\n"); */ |
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#endif |
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} |
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|
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alWriteFrames(output_port, out->p, len / combinedFrameSize); |
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|
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out->p += len; |
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if (out->p == out->end) |
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{ |
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long long duration; |
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long elapsed; |
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|
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gettimeofday(&tv, NULL); |
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duration = (out->size * (1000000 / (g_samplewidth * g_snd_rate))); |
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elapsed = (tv.tv_sec - startedat_s) * 1000000 + (tv.tv_usec - startedat_us); |
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/* 7/10 is not good for IRIX audio port, 4x/100 is suitable */ |
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if (elapsed >= (duration * 485) / 1000) |
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{ |
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rdpsnd_send_completion(packet->tick, packet->index); |
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free(out->data); |
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queue_lo = (queue_lo + 1) % MAX_QUEUE; |
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started = False; |
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swapped = False; |
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} |
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else |
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{ |
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#if (defined(IRIX_DEBUG)) |
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/* fprintf(stderr,"Busy playing...\n"); */ |
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#endif |
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g_dsp_busy = True; |
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return; |
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} |
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} |
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} |
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} |
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