mirror of
https://github.com/mpv-player/mpv
synced 2024-12-19 21:31:52 +00:00
4873b32c59
Finish renaming directories and moving files. Adjust all include
statements to make the previous commit compile.
The two commits are separate, because git is bad at tracking renames
and content changes at the same time.
Also take this as an opportunity to remove the separation between
"common" and "mplayer" sources in the Makefile. ("common" used to be
shared between mplayer and mencoder.)
130 lines
3.2 KiB
C
130 lines
3.2 KiB
C
/*
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* null audio output driver
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*
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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 "talloc.h"
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#include "config.h"
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#include "osdep/timer.h"
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#include "audio/format.h"
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#include "ao.h"
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struct priv {
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unsigned last_time;
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float buffered_bytes;
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};
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static void drain(struct ao *ao)
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{
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struct priv *priv = ao->priv;
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unsigned now = GetTimer();
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priv->buffered_bytes -= (now - priv->last_time) / 1e6 * ao->bps;
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if (priv->buffered_bytes < 0)
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priv->buffered_bytes = 0;
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priv->last_time = now;
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}
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static int init(struct ao *ao, char *params)
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{
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struct priv *priv = talloc_zero(ao, struct priv);
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ao->priv = priv;
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int samplesize = af_fmt2bits(ao->format) / 8;
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ao->outburst = 256 * ao->channels * samplesize;
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// A "buffer" for about 0.2 seconds of audio
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ao->buffersize = (int)(ao->samplerate * 0.2 / 256 + 1) * ao->outburst;
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ao->bps = ao->channels * ao->samplerate * samplesize;
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priv->last_time = GetTimer();
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return 0;
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}
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// close audio device
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static void uninit(struct ao *ao, bool cut_audio)
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{
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}
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// stop playing and empty buffers (for seeking/pause)
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static void reset(struct ao *ao)
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{
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struct priv *priv = ao->priv;
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priv->buffered_bytes = 0;
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}
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// stop playing, keep buffers (for pause)
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static void pause(struct ao *ao)
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{
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// for now, just call reset();
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reset(ao);
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}
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// resume playing, after audio_pause()
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static void resume(struct ao *ao)
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{
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}
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static int get_space(struct ao *ao)
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{
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struct priv *priv = ao->priv;
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drain(ao);
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return ao->buffersize - priv->buffered_bytes;
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}
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static int play(struct ao *ao, void *data, int len, int flags)
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{
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struct priv *priv = ao->priv;
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int maxbursts = (ao->buffersize - priv->buffered_bytes) / ao->outburst;
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int playbursts = len / ao->outburst;
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int bursts = playbursts > maxbursts ? maxbursts : playbursts;
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priv->buffered_bytes += bursts * ao->outburst;
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return bursts * ao->outburst;
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}
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static float get_delay(struct ao *ao)
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{
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struct priv *priv = ao->priv;
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drain(ao);
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return priv->buffered_bytes / ao->bps;
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}
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const struct ao_driver audio_out_null = {
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.is_new = true,
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.info = &(const struct ao_info) {
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"Null audio output",
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"null",
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"Tobias Diedrich <ranma+mplayer@tdiedrich.de>",
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"",
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},
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.init = init,
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.uninit = uninit,
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.reset = reset,
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.get_space = get_space,
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.play = play,
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.get_delay = get_delay,
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.pause = pause,
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.resume = resume,
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};
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