Diffstat (limited to 'core/multimedia/opieplayer/libflash/sound.cc') (more/less context) (ignore whitespace changes)
| -rw-r--r-- | core/multimedia/opieplayer/libflash/sound.cc | 439 |
1 files changed, 439 insertions, 0 deletions
diff --git a/core/multimedia/opieplayer/libflash/sound.cc b/core/multimedia/opieplayer/libflash/sound.cc new file mode 100644 index 0000000..e93f9b5 --- a/dev/null +++ b/core/multimedia/opieplayer/libflash/sound.cc @@ -0,0 +1,439 @@ +///////////////////////////////////////////////////////////// +// Flash Plugin and Player +// Copyright (C) 1998,1999 Olivier Debon +// +// 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +// +/////////////////////////////////////////////////////////////// +// Author : Olivier Debon <odebon@club-internet.fr> +// + +#include "swf.h" + +#include <unistd.h> +#include <fcntl.h> +#include <sys/ioctl.h> +#ifndef NOSOUND +#include <linux/soundcard.h> +#endif + +#ifdef RCSID +static char *rcsid = "$Id$"; +#endif + +#define PRINT 0 + +//////////// SOUND + +Sound::Sound(long id) : Character(SoundType, id) +{ + samples = 0; + stereo = 0; + soundRate = 0; + sampleSize = 1; +} + +Sound::~Sound() +{ + if (samples) { + delete samples; + } +} + +void +Sound::setSoundFlags(long f) { + switch (GET_SOUND_RATE_CODE(f)) { + case 0: + soundRate = 5500; + break; + case 1: + soundRate = 11000; + break; + case 2: + soundRate = 22000; + break; + case 3: + soundRate = 44000; + break; + } + if (f & soundIs16bit) { + sampleSize = 2; + } + if (f & soundIsStereo) { + stereo = 1; + } + +#if PRINT + printf("-----\nFlags = %2x\n", f); + printf("Rate = %d kHz ", soundRate); + printf("SampleSize = %d byte(s) ", sampleSize); + if (f & soundIsStereo) { + printf("Stereo "); + } else { + printf("Mono "); + } + if (f & soundIsADPCMCompressed) { + printf("ADPCM\n"); + } else { + printf("Raw\n"); + } +#endif +} + +char * +Sound::setNbSamples(long n) { + long size; + + nbSamples = n; + + size = nbSamples * (stereo ? 2 : 1) * sampleSize; + + samples = new char[ size ]; + + memset((char *)samples,0, size); + + return samples; +} + +long +Sound::getRate() { + return soundRate; +} + +long +Sound::getChannel() { + return stereo ? 2 : 1; +} + +long +Sound::getNbSamples() { + return nbSamples; +} + +long +Sound::getSampleSize() { + return sampleSize; +} + +char * +Sound::getSamples() { + return samples; +} + +//////////// SOUND MIXER + +long SoundMixer::dsp = -1; // Init of descriptor +long SoundMixer::blockSize = 0; // Driver sound buffer size +long SoundMixer::nbInst = 0; // Nb SoundMixer instances +long SoundMixer::sampleSize = 0; +long SoundMixer::stereo = 0; +long SoundMixer::soundRate = 0; +char *SoundMixer::buffer = 0; + +SoundMixer::SoundMixer(char *device) +{ +#ifndef NOSOUND + int status; + long fmt; + + list = 0; // No sound to play + + if (nbInst++) { + // Device is already open + return; + } + + dsp = open(device,O_WRONLY); + if (dsp < 0) { + perror("open dsp"); + return; + } + + // Reset device + status = ioctl(dsp, SNDCTL_DSP_RESET); + if (status < 0) perror("ioctl SNDCTL_DSP_RESET"); + + // Set sample size + fmt = AFMT_S16_LE; + sampleSize = 2; + status = ioctl(dsp, SNDCTL_DSP_SETFMT, &fmt); + if (status < 0) perror("ioctl SNDCTL_DSP_SETFMT"); + + if (status) { + fmt = AFMT_U8; + sampleSize = 1; + status = ioctl(dsp, SNDCTL_DSP_SETFMT, &fmt); + if (status < 0) perror("ioctl SNDCTL_DSP_SETFMT"); + } + + // Set stereo channel + stereo = 1; + status = ioctl(dsp, SNDCTL_DSP_STEREO, &stereo); + + if (status) { + stereo = 0; + } + + // Set sound rate in Hertz + soundRate = 11000; + status = ioctl(dsp, SNDCTL_DSP_SPEED, &soundRate); + if (status < 0) perror("ioctl SNDCTL_DSP_SPEED"); + + // Get device buffer size + status = ioctl(dsp, SNDCTL_DSP_GETBLKSIZE, &blockSize); + if (status < 0) perror("ioctl SNDCTL_DSP_GETBLKSIZE"); + if (blockSize < 1024) { + blockSize = 32768; + } + blockSize *= 2; + + buffer = (char *)malloc(blockSize); + if (buffer == 0) { + close(dsp); + dsp = -1; + } + +#if PRINT + int caps; + + ioctl(dsp,SNDCTL_DSP_GETCAPS, &caps); + printf("Audio capabilities = %x\n", caps); + printf("Sound Rate = %d\n", soundRate); + printf("Stereo = %d\n", stereo); + printf("Sample Size = %d\n", sampleSize); + printf("Buffer Size = %d\n", blockSize); +#endif /* PRINT */ + +#endif /* NOSOUND */ +} + +SoundMixer::~SoundMixer() +{ + if (--nbInst == 0) { + if (dsp > 0) { + close(dsp); + free(buffer); + } + } +} + +void +SoundMixer::stopSounds() +{ +#ifndef NOSOUND + SoundList *sl,*del; + + for(sl = list; sl; ) { + del = sl; + sl = sl->next; + delete del; + } + list = 0; +#endif +} + +void +SoundMixer::startSound(Sound *sound) +{ +#ifndef NOSOUND + SoundList *sl; + + if (sound) { + // Add sound in list + sl = new SoundList; + sl->rate = sound->getRate(); + sl->stereo = (sound->getChannel() == 2); + sl->sampleSize = sound->getSampleSize(); + sl->current = sound->getSamples(); + sl->remaining = sound->getSampleSize()*sound->getNbSamples()*sound->getChannel(); + sl->next = list; + list = sl; + } +#endif +} + +long +SoundMixer::playSounds() +{ +#ifndef NOSOUND + audio_buf_info bufInfo; + long nbBytes, n; + SoundList *sl,*prev; + int status; + + // Init failed + if (dsp < 0) return 0; + + // No sound to play + if (list == 0) return 0; + + // Get free DMA buffer space + status = ioctl(dsp, SNDCTL_DSP_GETOSPACE, &bufInfo); + + // Free space is not large enough to output data without blocking + // But there are still sounds to play. We must wait. + if (bufInfo.bytes < blockSize) return 1; + + nbBytes = 0; + + // Fill buffer with silence. + memset((void*)buffer, 0, blockSize); + + prev = 0; + sl = list; + while(sl) { + + // Ask sound to fill the buffer + // according to device capabilities + n = fillSoundBuffer(sl, buffer, blockSize); + + // Remember the largest written size + if (n > nbBytes) { + nbBytes = n; + } + + // No more samples for this sound + if (sl->remaining == 0) { + // Remove sound from list + if (prev) { + prev->next = sl->next; + delete sl; + sl = prev->next; + } else { + list = sl->next; + delete sl; + sl = list; + } + } else { + sl = sl->next; + } + } + + if (nbBytes) { + // At last ! Play It ! + write(dsp,buffer,nbBytes); + status = ioctl(dsp, SNDCTL_DSP_POST); + } + + return nbBytes; +#else + return 0; +#endif +} + +long +SoundMixer::fillSoundBuffer(SoundList *sl, char *buff, long buffSize) +{ + long sampleLeft, sampleRight; + long skipOut, skipOutInit; + long skipIn, skipInInit; + long freqRatio; + long totalOut = 0; + + sampleLeft = sampleRight = 0; + skipOutInit = skipInInit = 0; + + freqRatio = sl->rate / soundRate; + if (freqRatio) { + skipOutInit = freqRatio - 1; + skipInInit = 0; + } + + freqRatio = soundRate / sl->rate; + if (freqRatio) { + skipInInit = freqRatio - 1; + skipOutInit = 0; + } + + skipOut = skipOutInit; + skipIn = skipInInit; + while (buffSize && sl->remaining) { + if (skipIn-- == 0) { + // Get sampleLeft + if (sl->sampleSize == 2) { + sampleLeft = (long)(*(short *)(sl->current)); + if (sampleSize == 1) { + sampleLeft = (sampleLeft >> 8) &0xff; + } + } else { + sampleLeft = (long)*(sl->current); + if (sampleSize == 2) { + sampleLeft <<= 8; + } + } + sl->current += sl->sampleSize; + sl->remaining -= sl->sampleSize; + + if (sl->stereo) { + // Get sampleRight + if (sl->sampleSize == 2) { + sampleRight = (long)(*(short *)(sl->current)); + if (sampleSize == 1) { + sampleRight = (sampleRight >> 8) &0xff; + } + } else { + sampleRight = (long)*(sl->current); + if (sampleSize == 2) { + sampleRight <<= 8; + } + } + sl->current += sl->sampleSize; + sl->remaining -= sl->sampleSize; + + } else { + sampleRight = sampleLeft; + } + + skipIn = skipInInit; + } + + if (skipOut-- == 0) { + // Output + if (stereo) { + if (sampleSize == 2) { + *((short *)buff) += sampleLeft/2; + buffSize -= sampleSize; + buff += sampleSize; + *((short *)buff) += sampleRight/2; + buffSize -= sampleSize; + buff += sampleSize; + } else { + *((char *)buff) += sampleLeft/2; + buffSize -= sampleSize; + buff += sampleSize; + *((char *)buff) += sampleRight/2; + buffSize -= sampleSize; + buff += sampleSize; + } + totalOut += 2*sampleSize; + } else { + if (sampleSize == 2) { + *((short *)buff) += (sampleLeft+sampleRight)>>2; + buffSize -= sampleSize; + buff += sampleSize; + } else { + *((char *)buff) += (sampleLeft+sampleRight)>>2; + buffSize -= sampleSize; + buff += sampleSize; + } + totalOut += sampleSize; + } + + skipOut = skipOutInit; + } + } + + return totalOut; +} |