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🎥 Command line media player
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162/* * This file is part of mpv. * * mpv 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. * * mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>. */
#ifndef MPLAYER_AF_H#define MPLAYER_AF_H
#include <stdio.h>#include <stdbool.h>#include <sys/types.h>
#include "config.h"#if !(HAVE_LIBAF && HAVE_GPL)#error "libaf/GPL disabled"#endif
#include "options/options.h"#include "audio/format.h"#include "audio/chmap.h"#include "audio/audio.h"#include "common/msg.h"#include "common/common.h"
struct af_instance;struct mpv_global;
// Number of channels#define AF_NCH MP_NUM_CHANNELS
// Flags for af->filter()#define AF_FILTER_FLAG_EOF 1
/* Audio filter information not specific for current instance, but for a specific filter */struct af_info { const char *info; const char *name; int (*open)(struct af_instance *vf); int priv_size; const void *priv_defaults; const struct m_option *options;};
// Linked list of audio filtersstruct af_instance { const struct af_info *info; char *full_name; struct mp_log *log; struct MPOpts *opts; struct mpv_global *global; int (*control)(struct af_instance *af, int cmd, void *arg); void (*uninit)(struct af_instance *af); /* Feed a frame. The frame is NULL if EOF was reached, and the filter * should drain all remaining buffered data. * Use af_add_output_frame() to output data. The optional filter_out * callback can be set to produce output frames gradually. */ int (*filter_frame)(struct af_instance *af, struct mp_audio *frame); int (*filter_out)(struct af_instance *af); void *priv; struct mp_audio *data; // configuration and buffer for outgoing data stream
struct af_instance *next; struct af_instance *prev; double delay; /* Delay caused by the filter, in seconds of audio consumed * without corresponding output */ bool auto_inserted; // inserted by af.c, such as conversion filters char *label;
struct mp_audio fmt_in, fmt_out;
struct mp_audio **out_queued; int num_out_queued;
struct mp_audio_pool *out_pool;};
// Current audio streamstruct af_stream { int initialized; // 0: no, 1: yes, -1: attempted to, but failed
// The first and last filter in the list struct af_instance *first; struct af_instance *last; // The user sets the input format (what the decoder outputs), and sets some // or all fields in output to the output format the AO accepts. struct mp_audio input; struct mp_audio output; struct mp_audio filter_output;
struct mp_log *log; struct MPOpts *opts; struct mpv_global *global;};
// Return values#define AF_DETACH (CONTROL_OK + 1)#define AF_OK CONTROL_OK#define AF_TRUE CONTROL_TRUE#define AF_FALSE CONTROL_FALSE#define AF_UNKNOWN CONTROL_UNKNOWN#define AF_ERROR CONTROL_ERROR
// Parameters for af_control_*enum af_control { AF_CONTROL_REINIT = 1, AF_CONTROL_RESET, AF_CONTROL_SET_PLAYBACK_SPEED, AF_CONTROL_SET_PLAYBACK_SPEED_RESAMPLE, AF_CONTROL_GET_METADATA, AF_CONTROL_COMMAND,};
// Argument for AF_CONTROL_SET_PAN_LEVELtypedef struct af_control_ext_s { void* arg; // Argument int ch; // Chanel number} af_control_ext_t;
struct af_stream *af_new(struct mpv_global *global);void af_destroy(struct af_stream *s);int af_init(struct af_stream *s);void af_uninit(struct af_stream *s);struct af_instance *af_add(struct af_stream *s, char *name, char *label, char **args);int af_remove_by_label(struct af_stream *s, char *label);struct af_instance *af_find_by_label(struct af_stream *s, char *label);struct af_instance *af_control_any_rev(struct af_stream *s, int cmd, void *arg);void af_control_all(struct af_stream *s, int cmd, void *arg);int af_control_by_label(struct af_stream *s, int cmd, void *arg, bstr label);void af_seek_reset(struct af_stream *s);int af_send_command(struct af_stream *s, char *label, char *cmd, char *arg);
void af_add_output_frame(struct af_instance *af, struct mp_audio *frame);int af_filter_frame(struct af_stream *s, struct mp_audio *frame);int af_output_frame(struct af_stream *s, bool eof);struct mp_audio *af_read_output_frame(struct af_stream *s);void af_unread_output_frame(struct af_stream *s, struct mp_audio *frame);int af_make_writeable(struct af_instance *af, struct mp_audio *frame);
double af_calc_delay(struct af_stream *s);
int af_test_output(struct af_instance *af, struct mp_audio *out);
int af_from_ms(int n, float *in, int *out, int rate, float mi, float ma);float af_softclip(float a);
#endif /* MPLAYER_AF_H */