mirror of
https://github.com/mpv-player/mpv
synced 2024-12-25 08:12:17 +00:00
cc54377463
...because everything is terrible. strerror() is not documented as having to be thread-safe by POSIX and C11. (Which is pretty much bullshit, because both mandate threads and some form of thread-local storage - so there's no excuse why implementation couldn't implement this in a thread-safe way. Especially with C11 this is ridiculous, because there is no way to use threads and convert error numbers to strings at the same time!) Since we heavily use threads now, we should avoid unsafe functions like strerror(). strerror_r() is in POSIX, but GNU/glibc deliberately fucks it up and gives the function different semantics than the POSIX one. It's a bit of work to convince this piece of shit to expose the POSIX standard function, and not the messed up GNU one. strerror_l() is also in POSIX, but only since the 2008 standard, and thus is not widespread. The solution is using avlibc (libavutil, by its official name), which handles the unportable details for us, mostly. We avoid some pain.
298 lines
7.1 KiB
C
298 lines
7.1 KiB
C
/*
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* This file is part of MPlayer.
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*
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* MPlayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer 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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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "config.h"
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#include "audio_in.h"
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#include "common/common.h"
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#include "common/msg.h"
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#include <string.h>
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#include <errno.h>
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// sanitizes ai structure before calling other functions
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int audio_in_init(audio_in_t *ai, struct mp_log *log, int type)
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{
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ai->type = type;
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ai->setup = 0;
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ai->log = log;
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ai->channels = -1;
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ai->samplerate = -1;
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ai->blocksize = -1;
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ai->bytes_per_sample = -1;
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ai->samplesize = -1;
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switch (ai->type) {
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#if HAVE_ALSA
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case AUDIO_IN_ALSA:
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ai->alsa.handle = NULL;
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ai->alsa.log = NULL;
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ai->alsa.device = strdup("default");
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return 0;
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#endif
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#if HAVE_OSS_AUDIO
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case AUDIO_IN_OSS:
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ai->oss.audio_fd = -1;
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ai->oss.device = strdup("/dev/dsp");
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return 0;
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#endif
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#if HAVE_SNDIO
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case AUDIO_IN_SNDIO:
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ai->sndio.hdl = NULL;
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ai->sndio.device = strdup("default");
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return 0;
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#endif
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default:
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return -1;
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}
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}
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int audio_in_setup(audio_in_t *ai)
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{
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switch (ai->type) {
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#if HAVE_ALSA
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case AUDIO_IN_ALSA:
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if (ai_alsa_init(ai) < 0) return -1;
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ai->setup = 1;
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return 0;
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#endif
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#if HAVE_OSS_AUDIO
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case AUDIO_IN_OSS:
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if (ai_oss_init(ai) < 0) return -1;
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ai->setup = 1;
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return 0;
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#endif
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#if HAVE_SNDIO
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case AUDIO_IN_SNDIO:
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if (ai_sndio_init(ai) < 0) return -1;
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ai->setup = 1;
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return 0;
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#endif
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default:
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return -1;
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}
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}
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int audio_in_set_samplerate(audio_in_t *ai, int rate)
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{
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switch (ai->type) {
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#if HAVE_ALSA
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case AUDIO_IN_ALSA:
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ai->req_samplerate = rate;
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if (!ai->setup) return 0;
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if (ai_alsa_setup(ai) < 0) return -1;
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return ai->samplerate;
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#endif
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#if HAVE_OSS_AUDIO
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case AUDIO_IN_OSS:
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ai->req_samplerate = rate;
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if (!ai->setup) return 0;
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if (ai_oss_set_samplerate(ai) < 0) return -1;
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return ai->samplerate;
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#endif
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#if HAVE_SNDIO
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case AUDIO_IN_SNDIO:
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ai->req_samplerate = rate;
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if (!ai->setup) return 0;
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if (ai_sndio_setup(ai) < 0) return -1;
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return ai->samplerate;
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#endif
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default:
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return -1;
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}
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}
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int audio_in_set_channels(audio_in_t *ai, int channels)
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{
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switch (ai->type) {
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#if HAVE_ALSA
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case AUDIO_IN_ALSA:
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ai->req_channels = channels;
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if (!ai->setup) return 0;
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if (ai_alsa_setup(ai) < 0) return -1;
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return ai->channels;
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#endif
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#if HAVE_OSS_AUDIO
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case AUDIO_IN_OSS:
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ai->req_channels = channels;
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if (!ai->setup) return 0;
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if (ai_oss_set_channels(ai) < 0) return -1;
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return ai->channels;
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#endif
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#if HAVE_SNDIO
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case AUDIO_IN_SNDIO:
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ai->req_channels = channels;
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if (!ai->setup) return 0;
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if (ai_sndio_setup(ai) < 0) return -1;
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return ai->channels;
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#endif
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default:
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return -1;
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}
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}
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int audio_in_set_device(audio_in_t *ai, char *device)
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{
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#if HAVE_ALSA
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int i;
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#endif
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if (ai->setup) return -1;
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switch (ai->type) {
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#if HAVE_ALSA
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case AUDIO_IN_ALSA:
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free(ai->alsa.device);
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ai->alsa.device = strdup(device);
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/* mplayer cannot handle colons in arguments */
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for (i = 0; i < (int)strlen(ai->alsa.device); i++) {
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if (ai->alsa.device[i] == '.') ai->alsa.device[i] = ':';
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}
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return 0;
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#endif
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#if HAVE_OSS_AUDIO
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case AUDIO_IN_OSS:
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free(ai->oss.device);
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ai->oss.device = strdup(device);
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return 0;
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#endif
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#if HAVE_SNDIO
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case AUDIO_IN_SNDIO:
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if (ai->sndio.device) free(ai->sndio.device);
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ai->sndio.device = strdup(device);
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return 0;
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#endif
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default:
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return -1;
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}
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}
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int audio_in_uninit(audio_in_t *ai)
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{
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if (ai->setup) {
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switch (ai->type) {
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#if HAVE_ALSA
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case AUDIO_IN_ALSA:
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if (ai->alsa.log)
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snd_output_close(ai->alsa.log);
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if (ai->alsa.handle) {
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snd_pcm_close(ai->alsa.handle);
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}
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ai->setup = 0;
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return 0;
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#endif
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#if HAVE_OSS_AUDIO
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case AUDIO_IN_OSS:
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close(ai->oss.audio_fd);
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ai->setup = 0;
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return 0;
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#endif
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#if HAVE_SNDIO
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case AUDIO_IN_SNDIO:
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if (ai->sndio.hdl)
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sio_close(ai->sndio.hdl);
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ai->setup = 0;
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return 0;
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#endif
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}
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}
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return -1;
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}
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int audio_in_start_capture(audio_in_t *ai)
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{
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switch (ai->type) {
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#if HAVE_ALSA
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case AUDIO_IN_ALSA:
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return snd_pcm_start(ai->alsa.handle);
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#endif
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#if HAVE_OSS_AUDIO
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case AUDIO_IN_OSS:
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return 0;
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#endif
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#if HAVE_SNDIO
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case AUDIO_IN_SNDIO:
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if (!sio_start(ai->sndio.hdl))
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return -1;
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return 0;
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#endif
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default:
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return -1;
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}
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}
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int audio_in_read_chunk(audio_in_t *ai, unsigned char *buffer)
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{
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int ret;
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switch (ai->type) {
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#if HAVE_ALSA
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case AUDIO_IN_ALSA:
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ret = snd_pcm_readi(ai->alsa.handle, buffer, ai->alsa.chunk_size);
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if (ret != ai->alsa.chunk_size) {
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if (ret < 0) {
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MP_ERR(ai, "\nError reading audio: %s\n", snd_strerror(ret));
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if (ret == -EPIPE) {
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if (ai_alsa_xrun(ai) == 0) {
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MP_ERR(ai, "Recovered from cross-run, some frames may be left out!\n");
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} else {
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MP_ERR(ai, "Fatal error, cannot recover!\n");
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}
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}
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} else {
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MP_ERR(ai, "\nNot enough audio samples!\n");
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}
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return -1;
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}
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return ret;
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#endif
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#if HAVE_OSS_AUDIO
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case AUDIO_IN_OSS:
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ret = read(ai->oss.audio_fd, buffer, ai->blocksize);
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if (ret != ai->blocksize) {
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if (ret < 0) {
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MP_ERR(ai, "\nError reading audio: %s\n", mp_strerror(errno));
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} else {
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MP_ERR(ai, "\nNot enough audio samples!\n");
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}
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return -1;
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}
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return ret;
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#endif
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#if HAVE_SNDIO
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case AUDIO_IN_SNDIO:
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ret = sio_read(ai->sndio.hdl, buffer, ai->blocksize);
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if (ret != ai->blocksize) {
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if (ret < 0) {
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MP_ERR(ai, "\nError reading audio: %s\n", mp_strerror(errno));
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} else {
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MP_ERR(ai, "\nNot enough audio samples!\n");
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}
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return -1;
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}
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return ret;
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#endif
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default:
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return -1;
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}
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}
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