/* -*- c-basic-offset: 8 -*- rdesktop: A Remote Desktop Protocol client. Sound Channel Process Functions - Open Sound System Copyright (C) Matthew Chapman 2003 Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ /* This is a workaround for Esound bug 312665. FIXME: Remove this when Esound is fixed. */ #ifdef _FILE_OFFSET_BITS #undef _FILE_OFFSET_BITS #endif #include "rdesktop.h" #include #include #include #include #include #include #define MAX_QUEUE 10 int This->dsp_; BOOL This->dsp_bu = False; static int g_snd_rate; static short g_samplewidth; static BOOL g_driver_broken = False; static struct audio_packet { struct stream s; uint16 tick; uint8 index; } packet_queue[MAX_QUEUE]; static unsigned int queue_hi, queue_lo; BOOL wave_out_open(void) { char *dsp_dev = getenv("AUDIODEV"); if (dsp_dev == NULL) { dsp_dev = xstrdup("/dev/dsp"); } if ((This->dsp_ = open(dsp_dev, O_WRONLY | O_NONBLOCK)) == -1) { perror(dsp_dev); return False; } /* Non-blocking so that user interface is responsive */ fcntl(This->dsp_, F_SETFL, fcntl(This->dsp_, F_GETFL) | O_NONBLOCK); return True; } void wave_out_close(void) { close(This->dsp_); } BOOL wave_out_format_supported(WAVEFORMATEX * pwfx) { if (pwfx->wFormatTag != WAVE_FORMAT_PCM) return False; if ((pwfx->nChannels != 1) && (pwfx->nChannels != 2)) return False; if ((pwfx->wBitsPerSample != 8) && (pwfx->wBitsPerSample != 16)) return False; return True; } BOOL wave_out_set_format(WAVEFORMATEX * pwfx) { int stereo, format, fragments; ioctl(This->dsp_, SNDCTL_DSP_RESET, NULL); ioctl(This->dsp_, SNDCTL_DSP_SYNC, NULL); if (pwfx->wBitsPerSample == 8) format = AFMT_U8; else if (pwfx->wBitsPerSample == 16) format = AFMT_S16_LE; g_samplewidth = pwfx->wBitsPerSample / 8; if (ioctl(This->dsp_, SNDCTL_DSP_SETFMT, &format) == -1) { perror("SNDCTL_DSP_SETFMT"); close(This->dsp_); return False; } if (pwfx->nChannels == 2) { stereo = 1; g_samplewidth *= 2; } else { stereo = 0; } if (ioctl(This->dsp_, SNDCTL_DSP_STEREO, &stereo) == -1) { perror("SNDCTL_DSP_CHANNELS"); close(This->dsp_); return False; } g_snd_rate = pwfx->nSamplesPerSec; if (ioctl(This->dsp_, SNDCTL_DSP_SPEED, &g_snd_rate) == -1) { perror("SNDCTL_DSP_SPEED"); close(This->dsp_); return False; } /* try to get 7 fragments of 2^12 bytes size */ fragments = (7 << 16) + 12; ioctl(This->dsp_, SNDCTL_DSP_SETFRAGMENT, &fragments); if (!g_driver_broken) { audio_buf_info info; memset(&info, 0, sizeof(info)); if (ioctl(This->dsp_, SNDCTL_DSP_GETOSPACE, &info) == -1) { perror("SNDCTL_DSP_GETOSPACE"); close(This->dsp_); return False; } if (info.fragments == 0 || info.fragstotal == 0 || info.fragsize == 0) { fprintf(stderr, "Broken OSS-driver detected: fragments: %d, fragstotal: %d, fragsize: %d\n", info.fragments, info.fragstotal, info.fragsize); g_driver_broken = True; } } return True; } void wave_out_volume(uint16 left, uint16 right) { static BOOL use_dev_mixer = False; uint32 volume; int fd_mix = -1; volume = left / (65536 / 100); volume |= right / (65536 / 100) << 8; if (use_dev_mixer) { if ((fd_mix = open("/dev/mixer", O_RDWR | O_NONBLOCK)) == -1) { perror("open /dev/mixer"); return; } if (ioctl(fd_mix, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1) { perror("MIXER_WRITE(SOUND_MIXER_PCM)"); return; } close(fd_mix); } if (ioctl(This->dsp_, MIXER_WRITE(SOUND_MIXER_PCM), &volume) == -1) { perror("MIXER_WRITE(SOUND_MIXER_PCM)"); use_dev_mixer = True; return; } } void wave_out_write(STREAM s, uint16 tick, uint8 index) { struct audio_packet *packet = &packet_queue[queue_hi]; unsigned int next_hi = (queue_hi + 1) % MAX_QUEUE; if (next_hi == queue_lo) { error("No space to queue audio packet\n"); return; } queue_hi = next_hi; packet->s = *s; packet->tick = tick; packet->index = index; packet->s.p += 4; /* we steal the data buffer from s, give it a new one */ s->data = (uint8 *) malloc(s->size); if (!This->dsp_bu) wave_out_play(); } void wave_out_play(void) { struct audio_packet *packet; ssize_t len; STREAM out; static long startedat_us; static long startedat_s; static BOOL started = False; struct timeval tv; audio_buf_info info; while (1) { if (queue_lo == queue_hi) { This->dsp_bu = 0; return; } packet = &packet_queue[queue_lo]; out = &packet->s; if (!started) { gettimeofday(&tv, NULL); startedat_us = tv.tv_usec; startedat_s = tv.tv_sec; started = True; } len = out->end - out->p; if (!g_driver_broken) { memset(&info, 0, sizeof(info)); if (ioctl(This->dsp_, SNDCTL_DSP_GETOSPACE, &info) == -1) { perror("SNDCTL_DSP_GETOSPACE"); return; } if (info.fragments == 0) { This->dsp_bu = 1; return; } if (info.fragments * info.fragsize < len && info.fragments * info.fragsize > 0) { len = info.fragments * info.fragsize; } } len = write(This->dsp_, out->p, len); if (len == -1) { if (errno != EWOULDBLOCK) perror("write audio"); This->dsp_bu = 1; return; } out->p += len; if (out->p == out->end) { long long duration; long elapsed; gettimeofday(&tv, NULL); duration = (out->size * (1000000 / (g_samplewidth * g_snd_rate))); elapsed = (tv.tv_sec - startedat_s) * 1000000 + (tv.tv_usec - startedat_us); if (elapsed >= (duration * 85) / 100) { rdpsnd_send_completion(packet->tick, packet->index); free(out->data); queue_lo = (queue_lo + 1) % MAX_QUEUE; started = False; } else { This->dsp_bu = 1; return; } } } }