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Remove obsolete sound backends
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InvisibleUp
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@ -1,228 +0,0 @@
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/*
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SGLUDDSP.h
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Copyright (C) 2012 Paul C. Pratt
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You can redistribute this file and/or modify it under the terms
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of version 2 of the GNU General Public License as published by
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the Free Software Foundation. You should have received a copy
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of the license along with this file; see the file COPYING.
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This file 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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license for more details.
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*/
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/*
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Sound GLUe for "/Dev/DSP"
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OSS and related, accessed through "/dev/dsp"
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*/
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LOCALVAR int audio_fd = -1;
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LOCALVAR bool audio_started;
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#if 4 == kLn2SoundSampSz
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LOCALPROC ConvertSoundBlockToNative(tpSoundSamp p)
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{
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int i;
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for (i = kOneBuffLen; --i >= 0; ) {
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*p++ -= 0x8000;
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}
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}
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#else
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#define ConvertSoundBlockToNative(p)
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#endif
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LOCALPROC Sound_WriteOut(void)
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{
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int retry_count = 32;
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label_retry:
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if (--retry_count > 0) {
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int err;
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struct audio_buf_info info;
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if (ioctl(audio_fd, SNDCTL_DSP_GETOSPACE, &info) != 0) {
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fprintf(stderr, "SNDCTL_DSP_GETOSPACE fails\n");
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} else {
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tpSoundSamp NextPlayPtr;
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uint16_t PlayNowSize = 0;
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uint16_t MaskedFillOffset = ThePlayOffset & kOneBuffMask;
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uint16_t PrivateBuffUsed = TheFillOffset - ThePlayOffset;
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int used = (info.fragstotal * info.fragsize) - info.bytes;
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if (audio_started) {
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uint16_t TotPendBuffs = used >> kLnOneBuffSz;
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if (TotPendBuffs < MinFilledSoundBuffs) {
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MinFilledSoundBuffs = TotPendBuffs;
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}
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/* fprintf(stderr, "buffer used %d\n", (int)used); */
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} else {
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if (PrivateBuffUsed >= kAllBuffLen - kOneBuffLen) {
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audio_started = true;
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} else {
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info.bytes = 0;
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}
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}
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if (MaskedFillOffset != 0) {
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/* take care of left overs */
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PlayNowSize = kOneBuffLen - MaskedFillOffset;
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NextPlayPtr =
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TheSoundBuffer + (ThePlayOffset & kAllBuffMask);
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} else if (0 !=
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((TheFillOffset - ThePlayOffset) >> kLnOneBuffLen))
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{
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PlayNowSize = kOneBuffLen;
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NextPlayPtr =
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TheSoundBuffer + (ThePlayOffset & kAllBuffMask);
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} else {
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/* nothing to play now */
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}
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#if 4 == kLn2SoundSampSz
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PlayNowSize <<= 1;
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#endif
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if (PlayNowSize > info.bytes) {
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PlayNowSize = info.bytes;
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}
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if (0 != PlayNowSize) {
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err = write(
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audio_fd, NextPlayPtr, PlayNowSize);
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if (err < 0) {
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if (- EAGAIN == err) {
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/* buffer full, try again later */
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fprintf(stderr, "pcm write: EAGAIN\n");
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} else if (- EPIPE == err) {
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/* buffer seems to have emptied */
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fprintf(stderr, "pcm write emptied\n");
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goto label_retry;
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} else {
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fprintf(stderr, "audio_fd write error: %d\n",
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err);
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}
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} else {
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ThePlayOffset += err
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#if 4 == kLn2SoundSampSz
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>> 1
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#endif
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;
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goto label_retry;
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}
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}
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}
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}
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}
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LOCALPROC Sound_Start(void)
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{
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if (audio_fd >= 0) {
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Sound_Start0();
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audio_started = false;
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}
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}
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LOCALPROC Sound_Stop(void)
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{
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if (audio_fd >= 0) {
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if (0 !=
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ioctl(audio_fd, SNDCTL_DSP_RESET /* SNDCTL_DSP_HALT */,
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NULL))
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{
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fprintf(stderr, "SNDCTL_DSP_RESET fails\n");
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}
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}
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}
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#if 4 == kLn2SoundSampSz
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#define DesiredFormat AFMT_S16_NE
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#else
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#define DesiredFormat AFMT_U8
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#endif
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LOCALFUNC bool Sound_Init(void)
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{
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bool IsOk = false;
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audio_fd = open(AudioDevPath, O_WRONLY, 0);
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if (audio_fd < 0) {
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fprintf(stderr, "open /dev/dsp fails: %d\n", audio_fd);
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} else {
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int fragment_value = (16 /* 16 fragments */ << 16)
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#if 4 == kLn2SoundSampSz
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| 10 /* of 1024 bytes */
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#else
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| 9 /* of 512 bytes */
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#endif
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;
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int channels_value = 1;
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int fmt_value = DesiredFormat;
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int speed_value = SOUND_SAMPLERATE;
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/* fprintf(stderr, "open /dev/dsp works\n"); */
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if (0 !=
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ioctl(audio_fd, SNDCTL_DSP_SETFRAGMENT, &fragment_value))
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{
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fprintf(stderr, "SNDCTL_DSP_SETFRAGMENT fails\n");
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} else if ((0 !=
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ioctl(audio_fd, SNDCTL_DSP_CHANNELS, &channels_value))
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|| (channels_value != 1))
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{
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fprintf(stderr, "SNDCTL_DSP_CHANNELS fails\n");
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} else if ((0 !=
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ioctl(audio_fd, SNDCTL_DSP_SETFMT, &fmt_value))
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|| (fmt_value != DesiredFormat))
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{
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fprintf(stderr, "SNDCTL_DSP_SETFMT fails\n");
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} else if ((0 !=
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ioctl(audio_fd, SNDCTL_DSP_SPEED, &speed_value))
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|| (speed_value != SOUND_SAMPLERATE))
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{
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fprintf(stderr, "SNDCTL_DSP_SPEED fails\n");
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} else
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{
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IsOk = true;
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}
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if (! IsOk) {
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(void) close(audio_fd);
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audio_fd = -1;
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}
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}
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return true; /* keep going, even if no sound */
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}
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LOCALPROC Sound_UnInit(void)
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{
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if (audio_fd >= 0) {
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if (close(audio_fd) != 0) {
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fprintf(stderr, "close /dev/dsp fails\n");
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}
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audio_fd = -1;
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}
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}
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GLOBALOSGLUPROC Sound_EndWrite(uint16_t actL)
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{
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if (Sound_EndWrite0(actL)) {
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ConvertSoundBlockToNative(TheSoundBuffer
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+ ((TheFillOffset - kOneBuffLen) & kAllBuffMask));
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if (audio_fd >= 0) {
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Sound_WriteOut();
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}
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}
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}
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LOCALPROC Sound_SecondNotify(void)
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{
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if (audio_fd >= 0) {
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Sound_SecondNotify0();
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}
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}
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