mirror of
https://github.com/Relintai/sdl2_frt.git
synced 2025-03-16 15:06:22 +01:00
a5f3ea1448
A user reported that the mpv video player hangs after attempting to set an unsupported number of channels with the SDL audio output, because it thinks it's successfully opened the device. This makes the failure graceful.
355 lines
9.9 KiB
C
355 lines
9.9 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#if SDL_AUDIO_DRIVER_NETBSD
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/*
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* Driver for native NetBSD audio(4).
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* nia@NetBSD.org
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*/
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/time.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/audioio.h>
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#include "SDL_timer.h"
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#include "SDL_audio.h"
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#include "../../core/unix/SDL_poll.h"
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#include "../SDL_audio_c.h"
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#include "../SDL_audiodev_c.h"
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#include "SDL_netbsdaudio.h"
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/* #define DEBUG_AUDIO */
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static void
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NETBSDAUDIO_DetectDevices(void)
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{
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SDL_EnumUnixAudioDevices(0, NULL);
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}
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static void
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NETBSDAUDIO_Status(_THIS)
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{
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#ifdef DEBUG_AUDIO
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/* *INDENT-OFF* */
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audio_info_t info;
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const struct audio_prinfo *prinfo;
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if (ioctl(this->hidden->audio_fd, AUDIO_GETINFO, &info) < 0) {
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fprintf(stderr, "AUDIO_GETINFO failed.\n");
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return;
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}
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prinfo = this->iscapture ? &info.record : &info.play;
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fprintf(stderr, "\n"
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"[%s info]\n"
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"buffer size : %d bytes\n"
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"sample rate : %i Hz\n"
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"channels : %i\n"
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"precision : %i-bit\n"
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"encoding : 0x%x\n"
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"seek : %i\n"
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"sample count : %i\n"
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"EOF count : %i\n"
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"paused : %s\n"
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"error occured : %s\n"
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"waiting : %s\n"
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"active : %s\n"
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"",
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this->iscapture ? "record" : "play",
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prinfo->buffer_size,
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prinfo->sample_rate,
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prinfo->channels,
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prinfo->precision,
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prinfo->encoding,
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prinfo->seek,
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prinfo->samples,
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prinfo->eof,
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prinfo->pause ? "yes" : "no",
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prinfo->error ? "yes" : "no",
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prinfo->waiting ? "yes" : "no",
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prinfo->active ? "yes" : "no");
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fprintf(stderr, "\n"
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"[audio info]\n"
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"monitor_gain : %i\n"
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"hw block size : %d bytes\n"
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"hi watermark : %i\n"
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"lo watermark : %i\n"
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"audio mode : %s\n"
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"",
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info.monitor_gain,
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info.blocksize,
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info.hiwat, info.lowat,
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(info.mode == AUMODE_PLAY) ? "PLAY"
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: (info.mode = AUMODE_RECORD) ? "RECORD"
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: (info.mode == AUMODE_PLAY_ALL ? "PLAY_ALL" : "?"));
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fprintf(stderr, "\n"
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"[audio spec]\n"
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"format : 0x%x\n"
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"size : %u\n"
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"",
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this->spec.format,
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this->spec.size);
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/* *INDENT-ON* */
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#endif /* DEBUG_AUDIO */
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}
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static void
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NETBSDAUDIO_PlayDevice(_THIS)
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{
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struct SDL_PrivateAudioData *h = this->hidden;
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int written;
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/* Write the audio data */
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written = write(h->audio_fd, h->mixbuf, h->mixlen);
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if (written == -1) {
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/* Non recoverable error has occurred. It should be reported!!! */
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SDL_OpenedAudioDeviceDisconnected(this);
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perror("audio");
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return;
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}
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#ifdef DEBUG_AUDIO
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fprintf(stderr, "Wrote %d bytes of audio data\n", written);
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#endif
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}
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static Uint8 *
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NETBSDAUDIO_GetDeviceBuf(_THIS)
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{
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return (this->hidden->mixbuf);
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}
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static int
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NETBSDAUDIO_CaptureFromDevice(_THIS, void *_buffer, int buflen)
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{
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Uint8 *buffer = (Uint8 *) _buffer;
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int br;
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br = read(this->hidden->audio_fd, buffer, buflen);
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if (br == -1) {
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/* Non recoverable error has occurred. It should be reported!!! */
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perror("audio");
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return -1;
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}
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#ifdef DEBUG_AUDIO
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fprintf(stderr, "Captured %d bytes of audio data\n", br);
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#endif
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return 0;
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}
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static void
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NETBSDAUDIO_FlushCapture(_THIS)
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{
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audio_info_t info;
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size_t remain;
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Uint8 buf[512];
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if (ioctl(this->hidden->audio_fd, AUDIO_GETINFO, &info) < 0) {
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return; /* oh well. */
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}
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remain = (size_t) (info.record.samples * (SDL_AUDIO_BITSIZE(this->spec.format) / 8));
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while (remain > 0) {
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const size_t len = SDL_min(sizeof (buf), remain);
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const int br = read(this->hidden->audio_fd, buf, len);
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if (br <= 0) {
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return; /* oh well. */
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}
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remain -= br;
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}
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}
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static void
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NETBSDAUDIO_CloseDevice(_THIS)
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{
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if (this->hidden->audio_fd >= 0) {
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close(this->hidden->audio_fd);
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}
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SDL_free(this->hidden->mixbuf);
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SDL_free(this->hidden);
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}
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static int
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NETBSDAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
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{
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SDL_AudioFormat format = 0;
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audio_info_t info, hwinfo;
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struct audio_prinfo *prinfo = iscapture ? &info.record : &info.play;
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/* We don't care what the devname is...we'll try to open anything. */
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/* ...but default to first name in the list... */
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if (devname == NULL) {
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devname = SDL_GetAudioDeviceName(0, iscapture);
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if (devname == NULL) {
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return SDL_SetError("No such audio device");
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}
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}
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/* Initialize all variables that we clean on shutdown */
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this->hidden = (struct SDL_PrivateAudioData *)
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SDL_malloc((sizeof *this->hidden));
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if (this->hidden == NULL) {
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return SDL_OutOfMemory();
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}
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SDL_zerop(this->hidden);
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/* Open the audio device */
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this->hidden->audio_fd = open(devname, iscapture ? O_RDONLY : O_WRONLY);
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if (this->hidden->audio_fd < 0) {
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return SDL_SetError("Couldn't open %s: %s", devname, strerror(errno));
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}
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AUDIO_INITINFO(&info);
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#ifdef AUDIO_GETFORMAT /* Introduced in NetBSD 9.0 */
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if (ioctl(this->hidden->audio_fd, AUDIO_GETFORMAT, &hwinfo) != -1) {
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/*
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* Use the device's native sample rate so the kernel doesn't have to
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* resample.
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*/
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this->spec.freq = iscapture ?
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hwinfo.record.sample_rate : hwinfo.play.sample_rate;
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}
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#endif
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prinfo->encoding = AUDIO_ENCODING_NONE;
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prinfo->sample_rate = this->spec.freq;
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prinfo->channels = this->spec.channels;
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for (format = SDL_FirstAudioFormat(this->spec.format); format;) {
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switch (format) {
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case AUDIO_U8:
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prinfo->encoding = AUDIO_ENCODING_ULINEAR;
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prinfo->precision = 8;
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break;
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case AUDIO_S8:
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prinfo->encoding = AUDIO_ENCODING_SLINEAR;
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prinfo->precision = 8;
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break;
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case AUDIO_S16LSB:
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prinfo->encoding = AUDIO_ENCODING_SLINEAR_LE;
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prinfo->precision = 16;
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break;
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case AUDIO_S16MSB:
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prinfo->encoding = AUDIO_ENCODING_SLINEAR_BE;
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prinfo->precision = 16;
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break;
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case AUDIO_U16LSB:
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prinfo->encoding = AUDIO_ENCODING_ULINEAR_LE;
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prinfo->precision = 16;
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break;
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case AUDIO_U16MSB:
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prinfo->encoding = AUDIO_ENCODING_ULINEAR_BE;
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prinfo->precision = 16;
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break;
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case AUDIO_S32LSB:
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prinfo->encoding = AUDIO_ENCODING_SLINEAR_LE;
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prinfo->precision = 32;
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break;
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case AUDIO_S32MSB:
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prinfo->encoding = AUDIO_ENCODING_SLINEAR_BE;
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prinfo->precision = 32;
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break;
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}
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if (prinfo->encoding != AUDIO_ENCODING_NONE) {
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break;
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}
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format = SDL_NextAudioFormat();
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}
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if (prinfo->encoding == AUDIO_ENCODING_NONE) {
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return SDL_SetError("No supported encoding for 0x%x", this->spec.format);
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}
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info.hiwat = 5;
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info.lowat = 3;
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if (ioctl(this->hidden->audio_fd, AUDIO_SETINFO, &info) < 0) {
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return SDL_SetError("AUDIO_SETINFO failed for %s: %s", devname, strerror(errno));
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}
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if (ioctl(this->hidden->audio_fd, AUDIO_GETINFO, &info) < 0) {
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return SDL_SetError("AUDIO_GETINFO failed for %s: %s", devname, strerror(errno));
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}
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/* Final spec used for the device. */
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this->spec.format = format;
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this->spec.freq = prinfo->sample_rate;
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this->spec.channels = prinfo->channels;
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SDL_CalculateAudioSpec(&this->spec);
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if (!iscapture) {
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/* Allocate mixing buffer */
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this->hidden->mixlen = this->spec.size;
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this->hidden->mixbuf = (Uint8 *) SDL_malloc(this->hidden->mixlen);
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if (this->hidden->mixbuf == NULL) {
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return SDL_OutOfMemory();
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}
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SDL_memset(this->hidden->mixbuf, this->spec.silence, this->spec.size);
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}
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NETBSDAUDIO_Status(this);
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/* We're ready to rock and roll. :-) */
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return 0;
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}
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static int
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NETBSDAUDIO_Init(SDL_AudioDriverImpl * impl)
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{
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/* Set the function pointers */
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impl->DetectDevices = NETBSDAUDIO_DetectDevices;
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impl->OpenDevice = NETBSDAUDIO_OpenDevice;
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impl->PlayDevice = NETBSDAUDIO_PlayDevice;
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impl->GetDeviceBuf = NETBSDAUDIO_GetDeviceBuf;
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impl->CloseDevice = NETBSDAUDIO_CloseDevice;
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impl->CaptureFromDevice = NETBSDAUDIO_CaptureFromDevice;
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impl->FlushCapture = NETBSDAUDIO_FlushCapture;
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impl->HasCaptureSupport = SDL_TRUE;
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impl->AllowsArbitraryDeviceNames = 1;
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return 1; /* this audio target is available. */
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}
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AudioBootStrap NETBSDAUDIO_bootstrap = {
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"netbsd", "NetBSD audio", NETBSDAUDIO_Init, 0
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};
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#endif /* SDL_AUDIO_DRIVER_NETBSD */
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/* vi: set ts=4 sw=4 expandtab: */
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