mirror of https://github.com/mpv-player/mpv
274 lines
8.5 KiB
C
274 lines
8.5 KiB
C
#ifndef __aop_h__
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#define __aop_h__
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#include <stdio.h>
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#include "af_mp.h"
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#include "config.h"
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#include "control.h"
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#include "af_format.h"
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struct af_instance_s;
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// Audio data chunk
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typedef struct af_data_s
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{
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void* audio; // data buffer
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int len; // buffer length
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int rate; // sample rate
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int nch; // number of channels
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int format; // format
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int bps; // bytes per sample
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} af_data_t;
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// Fraction, used to calculate buffer lengths
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typedef struct frac_s
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{
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int n; // Numerator
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int d; // Denominator
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} frac_t;
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int af_gcd(register int a, register int b);
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void af_frac_cancel(frac_t *f);
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void af_frac_mul(frac_t *out, const frac_t *in);
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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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/* Audio filter information not specific for current instance, but for
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a specific filter */
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typedef struct af_info_s
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{
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const char *info;
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const char *name;
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const char *author;
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const char *comment;
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const int flags;
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int (*open)(struct af_instance_s* vf);
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} af_info_t;
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// Linked list of audio filters
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typedef struct af_instance_s
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{
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af_info_t* info;
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int (*control)(struct af_instance_s* af, int cmd, void* arg);
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void (*uninit)(struct af_instance_s* af);
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af_data_t* (*play)(struct af_instance_s* af, af_data_t* data);
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void* setup; // setup data for this specific instance and filter
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af_data_t* data; // configuration for outgoing data stream
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struct af_instance_s* next;
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struct af_instance_s* prev;
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double delay; // Delay caused by the filter [ms]
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frac_t mul; /* length multiplier: how much does this instance change
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the length of the buffer. */
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}af_instance_t;
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// Initialization flags
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extern int* af_cpu_speed;
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#define AF_INIT_AUTO 0x00000000
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#define AF_INIT_SLOW 0x00000001
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#define AF_INIT_FAST 0x00000002
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#define AF_INIT_FORCE 0x00000003
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#define AF_INIT_TYPE_MASK 0x00000003
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#define AF_INIT_INT 0x00000000
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#define AF_INIT_FLOAT 0x00000004
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#define AF_INIT_FORMAT_MASK 0x00000004
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// Default init type
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#ifndef AF_INIT_TYPE
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#if defined(HAVE_SSE) || defined(HAVE_3DNOW)
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#define AF_INIT_TYPE (af_cpu_speed?*af_cpu_speed:AF_INIT_FAST)
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#else
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#define AF_INIT_TYPE (af_cpu_speed?*af_cpu_speed:AF_INIT_SLOW)
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#endif
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#endif
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// Configuration switches
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typedef struct af_cfg_s{
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int force; // Initialization type
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char** list; /* list of names of filters that are added to filter
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list during first initialization of stream */
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}af_cfg_t;
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// Current audio stream
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typedef struct af_stream_s
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{
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// The first and last filter in the list
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af_instance_t* first;
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af_instance_t* last;
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// Storage for input and output data formats
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af_data_t input;
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af_data_t output;
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// Configuration for this stream
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af_cfg_t cfg;
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}af_stream_t;
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/*********************************************
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// Return values
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*/
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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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/*********************************************
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// Export functions
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*/
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/* Initialize the stream "s". This function creates a new filter list
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if necessary according to the values set in input and output. Input
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and output should contain the format of the current movie and the
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formate of the preferred output respectively. The function is
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reentrant i.e. if called with an already initialized stream the
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stream will be reinitialized. If the binary parameter
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"force_output" is set, the output format will be converted to the
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format given in "s", otherwise the output fromat in the last filter
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will be copied "s". The return value is 0 if success and -1 if
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failure */
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int af_init(af_stream_t* s, int force_output);
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// Uninit and remove all filters
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void af_uninit(af_stream_t* s);
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/* Add filter during execution. This function adds the filter "name"
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to the stream s. The filter will be inserted somewhere nice in the
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list of filters. The return value is a pointer to the new filter,
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If the filter couldn't be added the return value is NULL. */
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af_instance_t* af_add(af_stream_t* s, char* name);
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// Uninit and remove the filter "af"
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void af_remove(af_stream_t* s, af_instance_t* af);
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/* Find filter in the dynamic filter list using it's name This
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function is used for finding already initialized filters */
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af_instance_t* af_get(af_stream_t* s, char* name);
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// Filter data chunk through the filters in the list
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af_data_t* af_play(af_stream_t* s, af_data_t* data);
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// send control to all filters, starting with the last until
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// one accepts the command with AF_OK.
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// Returns the accepting filter or NULL if none was found.
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af_instance_t *af_control_any_rev (af_stream_t* s, int cmd, void* arg);
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/* Calculate how long the output from the filters will be given the
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input length "len". The calculated length is >= the actual
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length */
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int af_outputlen(af_stream_t* s, int len);
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/* Calculate how long the input to the filters should be to produce a
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certain output length, i.e. the return value of this function is
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the input length required to produce the output length "len". The
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calculated length is <= the actual length */
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int af_inputlen(af_stream_t* s, int len);
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/* Calculate how long the input IN to the filters should be to produce
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a certain output length OUT but with the following three constraints:
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1. IN <= max_insize, where max_insize is the maximum possible input
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block length
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2. OUT <= max_outsize, where max_outsize is the maximum possible
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output block length
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3. If possible OUT >= len.
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Return -1 in case of error */
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int af_calc_insize_constrained(af_stream_t* s, int len,
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int max_outsize,int max_insize);
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/* Calculate the total delay caused by the filters */
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double af_calc_delay(af_stream_t* s);
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// Helper functions and macros used inside the audio filters
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/* Helper function called by the macro with the same name only to be
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called from inside filters */
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int af_resize_local_buffer(af_instance_t* af, af_data_t* data);
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/* Helper function used to calculate the exact buffer length needed
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when buffers are resized. The returned length is >= than what is
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needed */
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int af_lencalc(frac_t mul, af_data_t* data);
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/* Helper function used to convert to gain value from dB. Returns
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AF_OK if of and AF_ERROR if fail */
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int af_from_dB(int n, float* in, float* out, float k, float mi, float ma);
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/* Helper function used to convert from gain value to dB. Returns
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AF_OK if of and AF_ERROR if fail */
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int af_to_dB(int n, float* in, float* out, float k);
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/* Helper function used to convert from ms to sample time*/
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int af_from_ms(int n, float* in, int* out, int rate, float mi, float ma);
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/* Helper function used to convert from sample time to ms */
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int af_to_ms(int n, int* in, float* out, int rate);
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/* Helper function for testing the output format */
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int af_test_output(struct af_instance_s* af, af_data_t* out);
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float af_softclip(float a);
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/** Print a list of all available audio filters */
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void af_help(void);
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/* Memory reallocation macro: if a local buffer is used (i.e. if the
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filter doesn't operate on the incoming buffer this macro must be
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called to ensure the buffer is big enough. */
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#define RESIZE_LOCAL_BUFFER(a,d)\
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((a->data->len < af_lencalc(a->mul,d))?af_resize_local_buffer(a,d):AF_OK)
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/* Some other useful macro definitions*/
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#ifndef min
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#define min(a,b)(((a)>(b))?(b):(a))
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#endif
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#ifndef max
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#define max(a,b)(((a)>(b))?(a):(b))
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#endif
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#ifndef clamp
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#define clamp(a,min,max) (((a)>(max))?(max):(((a)<(min))?(min):(a)))
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#endif
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#ifndef sign
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#define sign(a) (((a)>0)?(1):(-1))
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#endif
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#ifndef lrnd
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#define lrnd(a,b) ((b)((a)>=0.0?(a)+0.5:(a)-0.5))
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#endif
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/* Error messages */
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typedef struct af_msg_cfg_s
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{
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int level; /* Message level for debug and error messages max = 2
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min = -2 default = 0 */
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FILE* err; // Stream to print error messages to
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FILE* msg; // Stream to print information messages to
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}af_msg_cfg_t;
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extern af_msg_cfg_t af_msg_cfg; // Message
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#define AF_MSG_FATAL -3 // Fatal error exit immediately
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#define AF_MSG_ERROR -2 // Error return gracefully
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#define AF_MSG_WARN -1 // Print warning but do not exit (can be suppressed)
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#define AF_MSG_INFO 0 // Important information
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#define AF_MSG_VERBOSE 1 // Print this if verbose is enabled
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#define AF_MSG_DEBUG0 2 // Print if very verbose
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#define AF_MSG_DEBUG1 3 // Print if very very verbose
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/* Macro for printing error messages */
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#ifndef af_msg
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#define af_msg(lev, args... ) \
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(((lev)<AF_MSG_WARN)?(fprintf(af_msg_cfg.err?af_msg_cfg.err:stderr, ## args )): \
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(((lev)<=af_msg_cfg.level)?(fprintf(af_msg_cfg.msg?af_msg_cfg.msg:stdout, ## args )):0))
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#endif
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#endif /* __aop_h__ */
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