mirror of https://github.com/mpv-player/mpv
756 lines
23 KiB
C
756 lines
23 KiB
C
/*
|
|
* This file is part of MPlayer.
|
|
*
|
|
* MPlayer 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.
|
|
*
|
|
* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
|
|
#include "common/common.h"
|
|
#include "common/global.h"
|
|
|
|
#include "options/m_option.h"
|
|
#include "options/m_config.h"
|
|
|
|
#include "af.h"
|
|
|
|
// Static list of filters
|
|
extern struct af_info af_info_dummy;
|
|
extern struct af_info af_info_delay;
|
|
extern struct af_info af_info_channels;
|
|
extern struct af_info af_info_format;
|
|
extern struct af_info af_info_force;
|
|
extern struct af_info af_info_volume;
|
|
extern struct af_info af_info_equalizer;
|
|
extern struct af_info af_info_pan;
|
|
extern struct af_info af_info_surround;
|
|
extern struct af_info af_info_sub;
|
|
extern struct af_info af_info_export;
|
|
extern struct af_info af_info_drc;
|
|
extern struct af_info af_info_extrastereo;
|
|
extern struct af_info af_info_lavcac3enc;
|
|
extern struct af_info af_info_lavrresample;
|
|
extern struct af_info af_info_sweep;
|
|
extern struct af_info af_info_hrtf;
|
|
extern struct af_info af_info_ladspa;
|
|
extern struct af_info af_info_center;
|
|
extern struct af_info af_info_sinesuppress;
|
|
extern struct af_info af_info_karaoke;
|
|
extern struct af_info af_info_scaletempo;
|
|
extern struct af_info af_info_bs2b;
|
|
extern struct af_info af_info_lavfi;
|
|
extern struct af_info af_info_convert24;
|
|
extern struct af_info af_info_convertsignendian;
|
|
|
|
static struct af_info* filter_list[] = {
|
|
&af_info_dummy,
|
|
&af_info_delay,
|
|
&af_info_channels,
|
|
&af_info_format,
|
|
&af_info_volume,
|
|
&af_info_equalizer,
|
|
&af_info_pan,
|
|
&af_info_surround,
|
|
&af_info_sub,
|
|
#if HAVE_SYS_MMAN_H
|
|
&af_info_export,
|
|
#endif
|
|
&af_info_drc,
|
|
&af_info_extrastereo,
|
|
&af_info_lavcac3enc,
|
|
&af_info_lavrresample,
|
|
&af_info_sweep,
|
|
&af_info_hrtf,
|
|
#if HAVE_LADSPA
|
|
&af_info_ladspa,
|
|
#endif
|
|
&af_info_center,
|
|
&af_info_sinesuppress,
|
|
&af_info_karaoke,
|
|
&af_info_scaletempo,
|
|
#if HAVE_LIBBS2B
|
|
&af_info_bs2b,
|
|
#endif
|
|
#if HAVE_AF_LAVFI
|
|
&af_info_lavfi,
|
|
#endif
|
|
// Must come last, because they're fallback format conversion filter
|
|
&af_info_convert24,
|
|
&af_info_convertsignendian,
|
|
NULL
|
|
};
|
|
|
|
static bool get_desc(struct m_obj_desc *dst, int index)
|
|
{
|
|
if (index >= MP_ARRAY_SIZE(filter_list) - 1)
|
|
return false;
|
|
const struct af_info *af = filter_list[index];
|
|
*dst = (struct m_obj_desc) {
|
|
.name = af->name,
|
|
.description = af->info,
|
|
.priv_size = af->priv_size,
|
|
.priv_defaults = af->priv_defaults,
|
|
.options = af->options,
|
|
.p = af,
|
|
};
|
|
return true;
|
|
}
|
|
|
|
const struct m_obj_list af_obj_list = {
|
|
.get_desc = get_desc,
|
|
.description = "audio filters",
|
|
.aliases = {
|
|
{"force", "format"},
|
|
{0}
|
|
},
|
|
};
|
|
|
|
static bool af_config_equals(struct mp_audio *a, struct mp_audio *b)
|
|
{
|
|
return a->format == b->format
|
|
&& mp_chmap_equals(&a->channels, &b->channels)
|
|
&& a->rate == b->rate;
|
|
}
|
|
|
|
static void af_copy_unset_fields(struct mp_audio *dst, struct mp_audio *src)
|
|
{
|
|
if (dst->format == AF_FORMAT_UNKNOWN)
|
|
mp_audio_set_format(dst, src->format);
|
|
if (dst->nch == 0)
|
|
mp_audio_set_channels(dst, &src->channels);
|
|
if (dst->rate == 0)
|
|
dst->rate = src->rate;
|
|
}
|
|
|
|
static int input_control(struct af_instance* af, int cmd, void* arg)
|
|
{
|
|
switch (cmd) {
|
|
case AF_CONTROL_REINIT:
|
|
assert(arg == &((struct af_stream *)af->priv)->input);
|
|
return AF_OK;
|
|
}
|
|
return AF_UNKNOWN;
|
|
}
|
|
|
|
static int output_control(struct af_instance* af, int cmd, void* arg)
|
|
{
|
|
struct af_stream *s = af->priv;
|
|
struct mp_audio *output = &s->output;
|
|
struct mp_audio *filter_output = &s->filter_output;
|
|
|
|
switch (cmd) {
|
|
case AF_CONTROL_REINIT: {
|
|
struct mp_audio *in = arg;
|
|
struct mp_audio orig_in = *in;
|
|
|
|
*filter_output = *output;
|
|
af_copy_unset_fields(filter_output, in);
|
|
*in = *filter_output;
|
|
return af_config_equals(in, &orig_in) ? AF_OK : AF_FALSE;
|
|
}
|
|
}
|
|
return AF_UNKNOWN;
|
|
}
|
|
|
|
static int dummy_filter(struct af_instance* af, struct mp_audio* data, int f)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* Function for creating a new filter of type name.The name may
|
|
contain the commandline parameters for the filter */
|
|
static struct af_instance *af_create(struct af_stream *s, char *name,
|
|
char **args)
|
|
{
|
|
struct m_obj_desc desc;
|
|
if (!m_obj_list_find(&desc, &af_obj_list, bstr0(name))) {
|
|
MP_ERR(s, "Couldn't find audio filter '%s'.\n", name);
|
|
return NULL;
|
|
}
|
|
const struct af_info *info = desc.p;
|
|
/* Make sure that the filter is not already in the list if it is
|
|
non-reentrant */
|
|
if (info->flags & AF_FLAGS_NOT_REENTRANT) {
|
|
for (struct af_instance *cur = s->first; cur; cur = cur->next) {
|
|
if (cur->info == info) {
|
|
MP_ERR(s, "There can only be one "
|
|
"instance of the filter '%s' in each stream\n", name);
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
MP_VERBOSE(s, "Adding filter %s \n", name);
|
|
|
|
struct af_instance *af = talloc_zero(NULL, struct af_instance);
|
|
*af = (struct af_instance) {
|
|
.info = info,
|
|
.mul = 1,
|
|
.data = talloc_zero(af, struct mp_audio),
|
|
.log = mp_log_new(af, s->log, name),
|
|
};
|
|
struct m_config *config = m_config_from_obj_desc(af, s->log, &desc);
|
|
if (m_config_apply_defaults(config, name, s->opts->af_defs) < 0)
|
|
goto error;
|
|
if (m_config_set_obj_params(config, args) < 0)
|
|
goto error;
|
|
af->priv = config->optstruct;
|
|
|
|
// Initialize the new filter
|
|
if (af->info->open(af) != AF_OK)
|
|
goto error;
|
|
|
|
return af;
|
|
|
|
error:
|
|
MP_ERR(s, "Couldn't create or open audio filter '%s'\n", name);
|
|
talloc_free(af);
|
|
return NULL;
|
|
}
|
|
|
|
/* Create and insert a new filter of type name before the filter in the
|
|
argument. This function can be called during runtime, the return
|
|
value is the new filter */
|
|
static struct af_instance *af_prepend(struct af_stream *s,
|
|
struct af_instance *af,
|
|
char *name, char **args)
|
|
{
|
|
if (!af)
|
|
af = s->last;
|
|
if (af == s->first)
|
|
af = s->first->next;
|
|
// Create the new filter and make sure it is OK
|
|
struct af_instance *new = af_create(s, name, args);
|
|
if (!new)
|
|
return NULL;
|
|
// Update pointers
|
|
new->next = af;
|
|
new->prev = af->prev;
|
|
af->prev = new;
|
|
new->prev->next = new;
|
|
return new;
|
|
}
|
|
|
|
/* Create and insert a new filter of type name after the filter in the
|
|
argument. This function can be called during runtime, the return
|
|
value is the new filter */
|
|
static struct af_instance *af_append(struct af_stream *s,
|
|
struct af_instance *af,
|
|
char *name, char **args)
|
|
{
|
|
if (!af)
|
|
af = s->first;
|
|
if (af == s->last)
|
|
af = s->last->prev;
|
|
// Create the new filter and make sure it is OK
|
|
struct af_instance *new = af_create(s, name, args);
|
|
if (!new)
|
|
return NULL;
|
|
// Update pointers
|
|
new->prev = af;
|
|
new->next = af->next;
|
|
af->next = new;
|
|
new->next->prev = new;
|
|
return new;
|
|
}
|
|
|
|
// Uninit and remove the filter "af"
|
|
static void af_remove(struct af_stream *s, struct af_instance *af)
|
|
{
|
|
if (!af)
|
|
return;
|
|
|
|
if (af == s->first || af == s->last)
|
|
return;
|
|
|
|
// Print friendly message
|
|
MP_VERBOSE(s, "Removing filter %s \n", af->info->name);
|
|
|
|
// Detach pointers
|
|
af->prev->next = af->next;
|
|
af->next->prev = af->prev;
|
|
|
|
if (af->uninit)
|
|
af->uninit(af);
|
|
talloc_free(af);
|
|
}
|
|
|
|
static void remove_auto_inserted_filters(struct af_stream *s)
|
|
{
|
|
repeat:
|
|
for (struct af_instance *af = s->first; af; af = af->next) {
|
|
if (af->auto_inserted) {
|
|
af_remove(s, af);
|
|
goto repeat;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void af_print_filter_chain(struct af_stream *s, struct af_instance *at,
|
|
int msg_level)
|
|
{
|
|
MP_MSG(s, msg_level, "Audio filter chain:\n");
|
|
|
|
struct af_instance *af = s->first;
|
|
while (af) {
|
|
MP_MSG(s, msg_level, " [%s] ", af->info->name);
|
|
if (af->data) {
|
|
char *info = mp_audio_config_to_str(af->data);
|
|
MP_MSG(s, msg_level, "%s", info);
|
|
talloc_free(info);
|
|
}
|
|
if (af == at)
|
|
MP_MSG(s, msg_level, " <-");
|
|
MP_MSG(s, msg_level, "\n");
|
|
|
|
af = af->next;
|
|
}
|
|
|
|
MP_MSG(s, msg_level, " [ao] ");
|
|
char *info = mp_audio_config_to_str(&s->output);
|
|
MP_MSG(s, msg_level, "%s\n", info);
|
|
talloc_free(info);
|
|
}
|
|
|
|
static int af_count_filters(struct af_stream *s)
|
|
{
|
|
int count = 0;
|
|
for (struct af_instance *af = s->first; af; af = af->next)
|
|
count++;
|
|
return count;
|
|
}
|
|
|
|
// Finds the first conversion filter on the way from srcfmt to dstfmt.
|
|
// Conversions form a DAG: each node is a format/filter pair, and possible
|
|
// conversions are edges. We search the DAG for the shortest path.
|
|
// Some cases visit the same filter multiple times, but with different formats
|
|
// (like u24le->s8), so one node per format or filter separate is not enough.
|
|
// Returns the filter and dest. format for the first conversion step.
|
|
// (So we know what conversion filter with what format to insert next.)
|
|
static char *af_find_conversion_filter(int srcfmt, int *dstfmt)
|
|
{
|
|
#define MAX_NODES (64 * 32)
|
|
int num_fmt = 0, num_filt = 0;
|
|
for (int n = 0; filter_list[n]; n++)
|
|
num_filt = n + 1;
|
|
for (int n = 0; af_fmtstr_table[n].format; n++)
|
|
num_fmt = n + 1;
|
|
|
|
int num_nodes = num_fmt * num_filt;
|
|
assert(num_nodes < MAX_NODES);
|
|
|
|
bool visited[MAX_NODES] = {0};
|
|
unsigned char distance[MAX_NODES];
|
|
short previous[MAX_NODES] = {0};
|
|
for (int n = 0; n < num_nodes; n++) {
|
|
distance[n] = 255;
|
|
if (af_fmtstr_table[n % num_fmt].format == srcfmt)
|
|
distance[n] = 0;
|
|
}
|
|
|
|
while (1) {
|
|
int next = -1;
|
|
for (int n = 0; n < num_nodes; n++) {
|
|
if (!visited[n] && (next < 0 || (distance[n] < distance[next])))
|
|
next = n;
|
|
}
|
|
if (next < 0 || distance[next] == 255)
|
|
return NULL;
|
|
visited[next] = true;
|
|
|
|
int fmt = next % num_fmt;
|
|
if (af_fmtstr_table[fmt].format == *dstfmt) {
|
|
// Best match found
|
|
for (int cur = next; cur >= 0; cur = previous[cur] - 1) {
|
|
if (distance[cur] == 1) {
|
|
*dstfmt = af_fmtstr_table[cur % num_fmt].format;
|
|
return (char *)filter_list[cur / num_fmt]->name;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
for (int n = 0; filter_list[n]; n++) {
|
|
struct af_info *af = filter_list[n];
|
|
if (!af->test_conversion)
|
|
continue;
|
|
for (int i = 0; af_fmtstr_table[i].format; i++) {
|
|
if (i != fmt && af->test_conversion(af_fmtstr_table[fmt].format,
|
|
af_fmtstr_table[i].format))
|
|
{
|
|
int other = n * num_fmt + i;
|
|
int ndist = distance[next] + 1;
|
|
if (ndist < distance[other]) {
|
|
distance[other] = ndist;
|
|
previous[other] = next + 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
assert(0);
|
|
#undef MAX_NODES
|
|
}
|
|
|
|
static bool af_is_conversion_filter(struct af_instance *af)
|
|
{
|
|
return af && af->info->test_conversion != NULL;
|
|
}
|
|
|
|
// in is what af can take as input - insert a conversion filter if the actual
|
|
// input format doesn't match what af expects.
|
|
// Returns:
|
|
// AF_OK: must call af_reinit() or equivalent, format matches (or is closer)
|
|
// AF_FALSE: nothing was changed, format matches
|
|
// else: error
|
|
static int af_fix_format_conversion(struct af_stream *s,
|
|
struct af_instance **p_af,
|
|
struct mp_audio in)
|
|
{
|
|
int rv;
|
|
struct af_instance *af = *p_af;
|
|
struct af_instance *prev = af->prev;
|
|
struct mp_audio actual = *prev->data;
|
|
if (actual.format == in.format)
|
|
return AF_FALSE;
|
|
int dstfmt = in.format;
|
|
char *filter = af_find_conversion_filter(actual.format, &dstfmt);
|
|
if (!filter)
|
|
return AF_ERROR;
|
|
if (strcmp(filter, prev->info->name) == 0) {
|
|
if (prev->control(prev, AF_CONTROL_SET_FORMAT, &dstfmt) == AF_OK) {
|
|
*p_af = prev;
|
|
return AF_OK;
|
|
}
|
|
}
|
|
struct af_instance *new = af_prepend(s, af, filter, NULL);
|
|
if (new == NULL)
|
|
return AF_ERROR;
|
|
new->auto_inserted = true;
|
|
if (AF_OK != (rv = new->control(new, AF_CONTROL_SET_FORMAT, &dstfmt)))
|
|
return rv;
|
|
*p_af = new;
|
|
return AF_OK;
|
|
}
|
|
|
|
// same as af_fix_format_conversion - only wrt. channels
|
|
static int af_fix_channels(struct af_stream *s, struct af_instance **p_af,
|
|
struct mp_audio in)
|
|
{
|
|
int rv;
|
|
struct af_instance *af = *p_af;
|
|
struct af_instance *prev = af->prev;
|
|
struct mp_audio actual = *prev->data;
|
|
if (mp_chmap_equals(&actual.channels, &in.channels))
|
|
return AF_FALSE;
|
|
if (prev->control(prev, AF_CONTROL_SET_CHANNELS, &in.channels) == AF_OK) {
|
|
*p_af = prev;
|
|
return AF_OK;
|
|
}
|
|
char *filter = "lavrresample";
|
|
struct af_instance *new = af_prepend(s, af, filter, NULL);
|
|
if (new == NULL)
|
|
return AF_ERROR;
|
|
new->auto_inserted = true;
|
|
if (AF_OK != (rv = new->control(new, AF_CONTROL_SET_CHANNELS, &in.channels)))
|
|
return rv;
|
|
*p_af = new;
|
|
return AF_OK;
|
|
}
|
|
|
|
static int af_fix_rate(struct af_stream *s, struct af_instance **p_af,
|
|
struct mp_audio in)
|
|
{
|
|
int rv;
|
|
struct af_instance *af = *p_af;
|
|
struct af_instance *prev = af->prev;
|
|
struct mp_audio actual = *prev->data;
|
|
if (actual.rate == in.rate)
|
|
return AF_FALSE;
|
|
if (prev->control(prev, AF_CONTROL_SET_RESAMPLE_RATE, &in.rate) == AF_OK) {
|
|
*p_af = prev;
|
|
return AF_OK;
|
|
}
|
|
char *filter = "lavrresample";
|
|
struct af_instance *new = af_prepend(s, af, filter, NULL);
|
|
if (new == NULL)
|
|
return AF_ERROR;
|
|
new->auto_inserted = true;
|
|
if (AF_OK != (rv = new->control(new, AF_CONTROL_SET_RESAMPLE_RATE, &in.rate)))
|
|
return rv;
|
|
*p_af = new;
|
|
return AF_OK;
|
|
}
|
|
|
|
// Return AF_OK on success or AF_ERROR on failure.
|
|
// Warning:
|
|
// A failed af_reinit() leaves the audio chain behind in a useless, broken
|
|
// state (for example, format filters that were tentatively inserted stay
|
|
// inserted).
|
|
// In that case, you should always rebuild the filter chain, or abort.
|
|
static int af_reinit(struct af_stream *s)
|
|
{
|
|
remove_auto_inserted_filters(s);
|
|
// Start with the second filter, as the first filter is the special input
|
|
// filter which needs no initialization.
|
|
struct af_instance *af = s->first->next;
|
|
// Up to 7 retries per filter (channel, rate, 5x format conversions)
|
|
int max_retry = af_count_filters(s) * 7;
|
|
int retry = 0;
|
|
while (af) {
|
|
if (retry >= max_retry)
|
|
goto negotiate_error;
|
|
|
|
// Check if this is the first filter
|
|
struct mp_audio in = *af->prev->data;
|
|
// Reset just in case...
|
|
mp_audio_set_null_data(&in);
|
|
|
|
int rv = af->control(af, AF_CONTROL_REINIT, &in);
|
|
if (rv == AF_OK && !mp_audio_config_equals(&in, af->prev->data))
|
|
rv = AF_FALSE; // conversion filter needed
|
|
switch (rv) {
|
|
case AF_OK:
|
|
af = af->next;
|
|
break;
|
|
case AF_FALSE: { // Configuration filter is needed
|
|
if (af_fix_channels(s, &af, in) == AF_OK) {
|
|
retry++;
|
|
continue;
|
|
}
|
|
if (af_fix_rate(s, &af, in) == AF_OK) {
|
|
retry++;
|
|
continue;
|
|
}
|
|
// Do this last, to prevent "format->lavrresample" being added to
|
|
// the filter chain when output formats not supported by
|
|
// af_lavrresample are in use.
|
|
if (af_fix_format_conversion(s, &af, in) == AF_OK) {
|
|
retry++;
|
|
continue;
|
|
}
|
|
goto negotiate_error;
|
|
}
|
|
case AF_DETACH: { // Filter is redundant and wants to be unloaded
|
|
struct af_instance *aft = af->prev; // never NULL
|
|
af_remove(s, af);
|
|
af = aft->next;
|
|
break;
|
|
}
|
|
default:
|
|
MP_ERR(s, "Reinitialization did not work, "
|
|
"audio filter '%s' returned error code %i\n",
|
|
af->info->name, rv);
|
|
af_print_filter_chain(s, af, MSGL_ERR);
|
|
return AF_ERROR;
|
|
}
|
|
}
|
|
|
|
af_print_filter_chain(s, NULL, MSGL_V);
|
|
|
|
/* Set previously unset fields in s->output to those of the filter chain
|
|
* output. This is used to make the output format fixed, and even if you
|
|
* insert new filters or change the input format, the output format won't
|
|
* change. (Audio outputs generally can't change format at runtime.) */
|
|
af_copy_unset_fields(&s->output, &s->filter_output);
|
|
return af_config_equals(&s->output, &s->filter_output) ? AF_OK : AF_ERROR;
|
|
|
|
negotiate_error:
|
|
MP_ERR(s, "Unable to convert audio input format to output format.\n");
|
|
af_print_filter_chain(s, af, MSGL_ERR);
|
|
return AF_ERROR;
|
|
}
|
|
|
|
// Uninit and remove all filters
|
|
void af_uninit(struct af_stream *s)
|
|
{
|
|
while (s->first->next && s->first->next != s->last)
|
|
af_remove(s, s->first->next);
|
|
}
|
|
|
|
struct af_stream *af_new(struct mpv_global *global)
|
|
{
|
|
struct af_stream *s = talloc_zero(NULL, struct af_stream);
|
|
static struct af_info in = { .name = "in" };
|
|
s->first = talloc(s, struct af_instance);
|
|
*s->first = (struct af_instance) {
|
|
.info = &in,
|
|
.control = input_control,
|
|
.filter = dummy_filter,
|
|
.priv = s,
|
|
.data = &s->input,
|
|
.mul = 1.0,
|
|
};
|
|
static struct af_info out = { .name = "out" };
|
|
s->last = talloc(s, struct af_instance);
|
|
*s->last = (struct af_instance) {
|
|
.info = &out,
|
|
.control = output_control,
|
|
.filter = dummy_filter,
|
|
.priv = s,
|
|
.data = &s->filter_output,
|
|
.mul = 1.0,
|
|
};
|
|
s->first->next = s->last;
|
|
s->last->prev = s->first;
|
|
s->opts = global->opts;
|
|
s->log = mp_log_new(s, global->log, "!af");
|
|
return s;
|
|
}
|
|
|
|
void af_destroy(struct af_stream *s)
|
|
{
|
|
af_uninit(s);
|
|
talloc_free(s);
|
|
}
|
|
|
|
/* Initialize the stream "s". This function creates a new filter list
|
|
if necessary according to the values set in input and output. Input
|
|
and output should contain the format of the current movie and the
|
|
format of the preferred output respectively. The function is
|
|
reentrant i.e. if called with an already initialized stream the
|
|
stream will be reinitialized.
|
|
If one of the prefered output parameters is 0 the one that needs
|
|
no conversion is used (i.e. the output format in the last filter).
|
|
The return value is 0 if success and -1 if failure */
|
|
int af_init(struct af_stream *s)
|
|
{
|
|
// Sanity check
|
|
if (!s)
|
|
return -1;
|
|
|
|
// Precaution in case caller is misbehaving
|
|
mp_audio_set_null_data(&s->input);
|
|
mp_audio_set_null_data(&s->output);
|
|
|
|
// Check if this is the first call
|
|
if (s->first->next == s->last) {
|
|
// Add all filters in the list (if there are any)
|
|
struct m_obj_settings *list = s->opts->af_settings;
|
|
for (int i = 0; list && list[i].name; i++) {
|
|
if (!af_prepend(s, s->last, list[i].name, list[i].attribs)) {
|
|
af_uninit(s);
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (af_reinit(s) != AF_OK) {
|
|
// Something is stuffed audio out will not work
|
|
MP_ERR(s, "Could not create audio filter chain.\n");
|
|
af_uninit(s);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Add filter during execution. This function adds the filter "name"
|
|
to the stream s. The filter will be inserted somewhere nice in the
|
|
list of filters. The return value is a pointer to the new filter,
|
|
If the filter couldn't be added the return value is NULL. */
|
|
struct af_instance *af_add(struct af_stream *s, char *name, char **args)
|
|
{
|
|
struct af_instance *new;
|
|
// Sanity check
|
|
if (!s || !s->first || !name)
|
|
return NULL;
|
|
// Insert the filter somewhere nice
|
|
if (af_is_conversion_filter(s->first->next))
|
|
new = af_append(s, s->first->next, name, args);
|
|
else
|
|
new = af_prepend(s, s->first->next, name, args);
|
|
if (!new)
|
|
return NULL;
|
|
|
|
// Reinitalize the filter list
|
|
if (af_reinit(s) != AF_OK) {
|
|
af_uninit(s);
|
|
af_init(s);
|
|
return NULL;
|
|
}
|
|
return new;
|
|
}
|
|
|
|
/* Filter data chunk through the filters in the list.
|
|
* On success, *data is set to the filtered data/format.
|
|
* Warning: input audio data will be overwritten.
|
|
*/
|
|
int af_filter(struct af_stream *s, struct mp_audio *data, int flags)
|
|
{
|
|
struct af_instance *af = s->first;
|
|
assert(mp_audio_config_equals(af->data, data));
|
|
// Iterate through all filters
|
|
while (af) {
|
|
int r = af->filter(af, data, flags);
|
|
if (r < 0)
|
|
return r;
|
|
assert(mp_audio_config_equals(af->data, data));
|
|
af = af->next;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
// Calculate average ratio of filter output samples to input samples.
|
|
// e.g: num_output_samples = mul * num_input_samples
|
|
double af_calc_filter_multiplier(struct af_stream *s)
|
|
{
|
|
struct af_instance *af = s->first;
|
|
double mul = 1;
|
|
do {
|
|
mul *= af->mul;
|
|
af = af->next;
|
|
} while (af);
|
|
|
|
return mul;
|
|
}
|
|
|
|
/* Calculate the total delay [seconds of output] caused by the filters */
|
|
double af_calc_delay(struct af_stream *s)
|
|
{
|
|
struct af_instance *af = s->first;
|
|
double delay = 0.0;
|
|
while (af) {
|
|
delay += af->delay;
|
|
af = af->next;
|
|
}
|
|
return delay;
|
|
}
|
|
|
|
/* Send control to all filters, starting with the last until one accepts the
|
|
* command with AF_OK. Return the accepting filter. */
|
|
struct af_instance *af_control_any_rev(struct af_stream *s, int cmd, void *arg)
|
|
{
|
|
int res = AF_UNKNOWN;
|
|
struct af_instance *filt = s->last;
|
|
while (filt) {
|
|
res = filt->control(filt, cmd, arg);
|
|
if (res == AF_OK)
|
|
return filt;
|
|
filt = filt->prev;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* Send control to all filters. Never stop, even if a filter returns AF_OK. */
|
|
void af_control_all(struct af_stream *s, int cmd, void *arg)
|
|
{
|
|
for (struct af_instance *af = s->first; af; af = af->next)
|
|
af->control(af, cmd, arg);
|
|
}
|