mirror of https://github.com/mpv-player/mpv
168 lines
5.3 KiB
C
168 lines
5.3 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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#ifndef MPLAYER_AF_H
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#define MPLAYER_AF_H
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#include <stdio.h>
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#include <stdbool.h>
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#include <sys/types.h>
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#include "options/options.h"
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#include "audio/format.h"
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#include "audio/chmap.h"
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#include "audio/audio.h"
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#include "common/msg.h"
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struct af_instance;
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struct mpv_global;
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// Number of channels
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#define AF_NCH MP_NUM_CHANNELS
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// Flags used for defining the behavior of an audio filter
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#define AF_FLAGS_REENTRANT 0x00000000
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#define AF_FLAGS_NOT_REENTRANT 0x00000001
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// Flags for af->filter()
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#define AF_FILTER_FLAG_EOF 1
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/* Audio filter information not specific for current instance, but for
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a specific filter */
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struct af_info {
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const char *info;
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const char *name;
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const int flags;
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int (*open)(struct af_instance *vf);
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bool (*test_conversion)(int src_format, int dst_format);
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int priv_size;
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const void *priv_defaults;
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const struct m_option *options;
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};
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// Linked list of audio filters
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struct af_instance {
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const struct af_info *info;
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struct mp_log *log;
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struct replaygain_data *replaygain_data;
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int (*control)(struct af_instance *af, int cmd, void *arg);
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void (*uninit)(struct af_instance *af);
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/* Feed a frame. The frame is NULL if EOF was reached, and the filter
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* should drain all remaining buffered data.
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* Use af_add_output_frame() to output data. The optional filter_out
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* callback can be set to produce output frames gradually.
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*/
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int (*filter_frame)(struct af_instance *af, struct mp_audio *frame);
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int (*filter_out)(struct af_instance *af);
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void *priv;
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struct mp_audio *data; // configuration and buffer for outgoing data stream
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struct af_instance *next;
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struct af_instance *prev;
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double delay; /* Delay caused by the filter, in seconds of audio consumed
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* without corresponding output */
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bool auto_inserted; // inserted by af.c, such as conversion filters
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char *label;
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struct mp_audio fmt_in, fmt_out;
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struct mp_audio **out_queued;
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int num_out_queued;
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struct mp_audio_pool *out_pool;
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};
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// Current audio stream
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struct af_stream {
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int initialized; // 0: no, 1: yes, -1: attempted to, but failed
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// The first and last filter in the list
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struct af_instance *first;
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struct af_instance *last;
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// The user sets the input format (what the decoder outputs), and sets some
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// or all fields in output to the output format the AO accepts.
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struct mp_audio input;
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struct mp_audio output;
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struct mp_audio filter_output;
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struct mp_log *log;
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struct MPOpts *opts;
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struct replaygain_data *replaygain_data;
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};
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// Return values
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#define AF_DETACH 2
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#define AF_OK 1
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#define AF_TRUE 1
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#define AF_FALSE 0
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#define AF_UNKNOWN -1
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#define AF_ERROR -2
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#define AF_FATAL -3
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// Parameters for af_control_*
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enum af_control {
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AF_CONTROL_REINIT = 1,
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AF_CONTROL_RESET,
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AF_CONTROL_SET_RESAMPLE_RATE,
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AF_CONTROL_SET_FORMAT,
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AF_CONTROL_SET_CHANNELS,
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AF_CONTROL_SET_VOLUME,
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AF_CONTROL_GET_VOLUME,
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AF_CONTROL_SET_PAN_LEVEL,
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AF_CONTROL_SET_PAN_NOUT,
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AF_CONTROL_SET_PAN_BALANCE,
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AF_CONTROL_GET_PAN_BALANCE,
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AF_CONTROL_SET_PLAYBACK_SPEED,
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AF_CONTROL_SET_PLAYBACK_SPEED_RESAMPLE,
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};
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// Argument for AF_CONTROL_SET_PAN_LEVEL
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typedef struct af_control_ext_s {
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void* arg; // Argument
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int ch; // Chanel number
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} af_control_ext_t;
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struct af_stream *af_new(struct mpv_global *global);
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void af_destroy(struct af_stream *s);
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int af_init(struct af_stream *s);
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void af_uninit(struct af_stream *s);
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struct af_instance *af_add(struct af_stream *s, char *name, char **args);
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int af_remove_by_label(struct af_stream *s, char *label);
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struct af_instance *af_find_by_label(struct af_stream *s, char *label);
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struct af_instance *af_control_any_rev(struct af_stream *s, int cmd, void *arg);
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void af_control_all(struct af_stream *s, int cmd, void *arg);
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void af_seek_reset(struct af_stream *s);
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void af_add_output_frame(struct af_instance *af, struct mp_audio *frame);
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int af_filter_frame(struct af_stream *s, struct mp_audio *frame);
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int af_output_frame(struct af_stream *s, bool eof);
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struct mp_audio *af_read_output_frame(struct af_stream *s);
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int af_make_writeable(struct af_instance *af, struct mp_audio *frame);
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double af_calc_delay(struct af_stream *s);
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int af_test_output(struct af_instance *af, struct mp_audio *out);
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int af_from_dB(int n, float *in, float *out, float k, float mi, float ma);
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int af_to_dB(int n, float *in, float *out, float k);
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int af_from_ms(int n, float *in, int *out, int rate, float mi, float ma);
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int af_to_ms(int n, int *in, float *out, int rate);
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float af_softclip(float a);
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#endif /* MPLAYER_AF_H */
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