| | |
| | | /* |
| | | Simple DirectMedia Layer |
| | | Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org> |
| | | Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org> |
| | | |
| | | This software is provided 'as-is', without any express or implied |
| | | warranty. In no event will the authors be held liable for any damages |
| | |
| | | #include "../SDL_audiodev_c.h" |
| | | #include "SDL_netbsdaudio.h" |
| | | |
| | | /* Use timer for synchronization */ |
| | | /* #define USE_TIMER_SYNC */ |
| | | |
| | | /* #define DEBUG_AUDIO */ |
| | | /* #define DEBUG_AUDIO_STREAM */ |
| | | |
| | | |
| | | static void |
| | | NETBSDAUDIO_DetectDevices(void) |
| | |
| | | #ifdef DEBUG_AUDIO |
| | | /* *INDENT-OFF* */ |
| | | audio_info_t info; |
| | | const audio_prinfo *prinfo; |
| | | const struct audio_prinfo *prinfo; |
| | | |
| | | if (ioctl(this->hidden->audio_fd, AUDIO_GETINFO, &info) < 0) { |
| | | fprintf(stderr, "AUDIO_GETINFO failed.\n"); |
| | | return; |
| | | } |
| | | |
| | | prinfo = this->iscapture ? &info.play : &info.record; |
| | | prinfo = this->iscapture ? &info.record : &info.play; |
| | | |
| | | fprintf(stderr, "\n" |
| | | "[%s info]\n" |
| | |
| | | (info.mode == AUMODE_PLAY) ? "PLAY" |
| | | : (info.mode = AUMODE_RECORD) ? "RECORD" |
| | | : (info.mode == AUMODE_PLAY_ALL ? "PLAY_ALL" : "?")); |
| | | |
| | | fprintf(stderr, "\n" |
| | | "[audio spec]\n" |
| | | "format : 0x%x\n" |
| | | "size : %u\n" |
| | | "", |
| | | this->spec.format, |
| | | this->spec.size); |
| | | /* *INDENT-ON* */ |
| | | #endif /* DEBUG_AUDIO */ |
| | | } |
| | | |
| | | |
| | | /* This function waits until it is possible to write a full sound buffer */ |
| | | static void |
| | | NETBSDAUDIO_WaitDevice(_THIS) |
| | | { |
| | | #ifndef USE_BLOCKING_WRITES /* Not necessary when using blocking writes */ |
| | | /* See if we need to use timed audio synchronization */ |
| | | if (this->hidden->frame_ticks) { |
| | | /* Use timer for general audio synchronization */ |
| | | Sint32 ticks; |
| | | |
| | | ticks = ((Sint32) (this->hidden->next_frame - SDL_GetTicks())) - FUDGE_TICKS; |
| | | if (ticks > 0) { |
| | | SDL_Delay(ticks); |
| | | } |
| | | } else { |
| | | /* Use SDL_IOReady() for audio synchronization */ |
| | | #ifdef DEBUG_AUDIO |
| | | fprintf(stderr, "Waiting for audio to get ready\n"); |
| | | #endif |
| | | if (SDL_IOReady(this->hidden->audio_fd, SDL_TRUE, 10 * 1000) |
| | | <= 0) { |
| | | const char *message = |
| | | "Audio timeout - buggy audio driver? (disabled)"; |
| | | /* In general we should never print to the screen, |
| | | but in this case we have no other way of letting |
| | | the user know what happened. |
| | | */ |
| | | fprintf(stderr, "SDL: %s\n", message); |
| | | SDL_OpenedAudioDeviceDisconnected(this); |
| | | /* Don't try to close - may hang */ |
| | | this->hidden->audio_fd = -1; |
| | | #ifdef DEBUG_AUDIO |
| | | fprintf(stderr, "Done disabling audio\n"); |
| | | #endif |
| | | } |
| | | #ifdef DEBUG_AUDIO |
| | | fprintf(stderr, "Ready!\n"); |
| | | #endif |
| | | } |
| | | #endif /* !USE_BLOCKING_WRITES */ |
| | | } |
| | | |
| | | static void |
| | | NETBSDAUDIO_PlayDevice(_THIS) |
| | | { |
| | | int written, p = 0; |
| | | struct SDL_PrivateAudioData *h = this->hidden; |
| | | int written; |
| | | |
| | | /* Write the audio data, checking for EAGAIN on broken audio drivers */ |
| | | do { |
| | | written = write(this->hidden->audio_fd, |
| | | &this->hidden->mixbuf[p], this->hidden->mixlen - p); |
| | | |
| | | if (written > 0) |
| | | p += written; |
| | | if (written == -1 && errno != 0 && errno != EAGAIN && errno != EINTR) { |
| | | /* Non recoverable error has occurred. It should be reported!!! */ |
| | | perror("audio"); |
| | | break; |
| | | } |
| | | /* Write the audio data */ |
| | | written = write(h->audio_fd, h->mixbuf, h->mixlen); |
| | | if (written == -1) { |
| | | /* Non recoverable error has occurred. It should be reported!!! */ |
| | | SDL_OpenedAudioDeviceDisconnected(this); |
| | | perror("audio"); |
| | | return; |
| | | } |
| | | |
| | | #ifdef DEBUG_AUDIO |
| | | fprintf(stderr, "Wrote %d bytes of audio data\n", written); |
| | | fprintf(stderr, "Wrote %d bytes of audio data\n", written); |
| | | #endif |
| | | |
| | | if (p < this->hidden->mixlen |
| | | || ((written < 0) && ((errno == 0) || (errno == EAGAIN)))) { |
| | | SDL_Delay(1); /* Let a little CPU time go by */ |
| | | } |
| | | } while (p < this->hidden->mixlen); |
| | | |
| | | /* If timer synchronization is enabled, set the next write frame */ |
| | | if (this->hidden->frame_ticks) { |
| | | this->hidden->next_frame += this->hidden->frame_ticks; |
| | | } |
| | | |
| | | /* If we couldn't write, assume fatal error for now */ |
| | | if (written < 0) { |
| | | SDL_OpenedAudioDeviceDisconnected(this); |
| | | } |
| | | } |
| | | |
| | | static Uint8 * |
| | |
| | | NETBSDAUDIO_CaptureFromDevice(_THIS, void *_buffer, int buflen) |
| | | { |
| | | Uint8 *buffer = (Uint8 *) _buffer; |
| | | int br, p = 0; |
| | | int br; |
| | | |
| | | /* Capture the audio data, checking for EAGAIN on broken audio drivers */ |
| | | do { |
| | | br = read(this->hidden->audio_fd, buffer + p, buflen - p); |
| | | if (br > 0) |
| | | p += br; |
| | | if (br == -1 && errno != 0 && errno != EAGAIN && errno != EINTR) { |
| | | /* Non recoverable error has occurred. It should be reported!!! */ |
| | | perror("audio"); |
| | | return p ? p : -1; |
| | | } |
| | | br = read(this->hidden->audio_fd, buffer, buflen); |
| | | if (br == -1) { |
| | | /* Non recoverable error has occurred. It should be reported!!! */ |
| | | perror("audio"); |
| | | return -1; |
| | | } |
| | | |
| | | #ifdef DEBUG_AUDIO |
| | | fprintf(stderr, "Captured %d bytes of audio data\n", br); |
| | | fprintf(stderr, "Captured %d bytes of audio data\n", br); |
| | | #endif |
| | | |
| | | if (p < buflen |
| | | || ((br < 0) && ((errno == 0) || (errno == EAGAIN)))) { |
| | | SDL_Delay(1); /* Let a little CPU time go by */ |
| | | } |
| | | } while (p < buflen); |
| | | return 0; |
| | | } |
| | | |
| | | static void |
| | |
| | | static int |
| | | NETBSDAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture) |
| | | { |
| | | const int flags = iscapture ? OPEN_FLAGS_INPUT : OPEN_FLAGS_OUTPUT; |
| | | SDL_AudioFormat format = 0; |
| | | audio_info_t info; |
| | | audio_prinfo *prinfo = iscapture ? &info.play : &info.record; |
| | | struct audio_prinfo *prinfo = iscapture ? &info.record : &info.play; |
| | | |
| | | /* We don't care what the devname is...we'll try to open anything. */ |
| | | /* ...but default to first name in the list... */ |
| | |
| | | SDL_zerop(this->hidden); |
| | | |
| | | /* Open the audio device */ |
| | | this->hidden->audio_fd = open(devname, flags, 0); |
| | | this->hidden->audio_fd = open(devname, iscapture ? O_RDONLY : O_WRONLY); |
| | | if (this->hidden->audio_fd < 0) { |
| | | return SDL_SetError("Couldn't open %s: %s", devname, strerror(errno)); |
| | | } |
| | | |
| | | AUDIO_INITINFO(&info); |
| | | |
| | | /* Calculate the final parameters for this audio specification */ |
| | | SDL_CalculateAudioSpec(&this->spec); |
| | | prinfo->encoding = AUDIO_ENCODING_NONE; |
| | | |
| | | /* Set to play mode */ |
| | | info.mode = iscapture ? AUMODE_RECORD : AUMODE_PLAY; |
| | | if (ioctl(this->hidden->audio_fd, AUDIO_SETINFO, &info) < 0) { |
| | | return SDL_SetError("Couldn't put device into play mode"); |
| | | } |
| | | |
| | | AUDIO_INITINFO(&info); |
| | | for (format = SDL_FirstAudioFormat(this->spec.format); |
| | | format; format = SDL_NextAudioFormat()) { |
| | | for (format = SDL_FirstAudioFormat(this->spec.format); format;) { |
| | | switch (format) { |
| | | case AUDIO_U8: |
| | | prinfo->encoding = AUDIO_ENCODING_ULINEAR; |
| | |
| | | prinfo->encoding = AUDIO_ENCODING_ULINEAR_BE; |
| | | prinfo->precision = 16; |
| | | break; |
| | | default: |
| | | continue; |
| | | } |
| | | |
| | | if (ioctl(this->hidden->audio_fd, AUDIO_SETINFO, &info) == 0) { |
| | | if (prinfo->encoding != AUDIO_ENCODING_NONE) { |
| | | break; |
| | | } |
| | | format = SDL_NextAudioFormat(); |
| | | } |
| | | |
| | | if (!format) { |
| | | if (prinfo->encoding == AUDIO_ENCODING_NONE) { |
| | | return SDL_SetError("No supported encoding for 0x%x", this->spec.format); |
| | | } |
| | | |
| | | this->spec.format = format; |
| | | |
| | | AUDIO_INITINFO(&info); |
| | | prinfo->channels = this->spec.channels; |
| | | if (ioctl(this->hidden->audio_fd, AUDIO_SETINFO, &info) == -1) { |
| | | this->spec.channels = 1; |
| | | } |
| | | AUDIO_INITINFO(&info); |
| | | prinfo->sample_rate = this->spec.freq; |
| | | /* Calculate spec parameters based on our chosen format */ |
| | | SDL_CalculateAudioSpec(&this->spec); |
| | | |
| | | info.mode = iscapture ? AUMODE_RECORD : AUMODE_PLAY; |
| | | info.blocksize = this->spec.size; |
| | | info.hiwat = 5; |
| | | info.lowat = 3; |
| | | prinfo->sample_rate = this->spec.freq; |
| | | prinfo->channels = this->spec.channels; |
| | | (void) ioctl(this->hidden->audio_fd, AUDIO_SETINFO, &info); |
| | | |
| | | (void) ioctl(this->hidden->audio_fd, AUDIO_GETINFO, &info); |
| | | this->spec.freq = prinfo->sample_rate; |
| | | this->spec.channels = prinfo->channels; |
| | | |
| | | if (!iscapture) { |
| | | /* Allocate mixing buffer */ |
| | |
| | | impl->DetectDevices = NETBSDAUDIO_DetectDevices; |
| | | impl->OpenDevice = NETBSDAUDIO_OpenDevice; |
| | | impl->PlayDevice = NETBSDAUDIO_PlayDevice; |
| | | impl->WaitDevice = NETBSDAUDIO_WaitDevice; |
| | | impl->GetDeviceBuf = NETBSDAUDIO_GetDeviceBuf; |
| | | impl->CloseDevice = NETBSDAUDIO_CloseDevice; |
| | | impl->CaptureFromDevice = NETBSDAUDIO_CaptureFromDevice; |