mirror of https://github.com/mpv-player/mpv
760 lines
23 KiB
C
760 lines
23 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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#include "config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include "mpvcore/m_option.h"
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#include "mpvcore/m_config.h"
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#include "af.h"
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// Static list of filters
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extern struct af_info af_info_dummy;
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extern struct af_info af_info_delay;
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extern struct af_info af_info_channels;
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extern struct af_info af_info_format;
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extern struct af_info af_info_force;
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extern struct af_info af_info_volume;
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extern struct af_info af_info_equalizer;
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extern struct af_info af_info_pan;
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extern struct af_info af_info_surround;
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extern struct af_info af_info_sub;
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extern struct af_info af_info_export;
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extern struct af_info af_info_drc;
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extern struct af_info af_info_extrastereo;
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extern struct af_info af_info_lavcac3enc;
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extern struct af_info af_info_lavrresample;
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extern struct af_info af_info_sweep;
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extern struct af_info af_info_hrtf;
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extern struct af_info af_info_ladspa;
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extern struct af_info af_info_center;
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extern struct af_info af_info_sinesuppress;
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extern struct af_info af_info_karaoke;
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extern struct af_info af_info_scaletempo;
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extern struct af_info af_info_bs2b;
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extern struct af_info af_info_lavfi;
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extern struct af_info af_info_convert24;
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extern struct af_info af_info_convertsignendian;
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static struct af_info* filter_list[] = {
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&af_info_dummy,
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&af_info_delay,
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&af_info_channels,
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&af_info_format,
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&af_info_volume,
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&af_info_equalizer,
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&af_info_pan,
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&af_info_surround,
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&af_info_sub,
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#if HAVE_SYS_MMAN_H
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&af_info_export,
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#endif
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&af_info_drc,
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&af_info_extrastereo,
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&af_info_lavcac3enc,
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&af_info_lavrresample,
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&af_info_sweep,
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&af_info_hrtf,
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#if HAVE_LADSPA
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&af_info_ladspa,
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#endif
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&af_info_center,
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&af_info_sinesuppress,
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&af_info_karaoke,
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&af_info_scaletempo,
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#if HAVE_LIBBS2B
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&af_info_bs2b,
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#endif
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#if HAVE_AF_LAVFI
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&af_info_lavfi,
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#endif
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// Must come last, because they're fallback format conversion filter
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&af_info_convert24,
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&af_info_convertsignendian,
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NULL
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};
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static bool get_desc(struct m_obj_desc *dst, int index)
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{
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if (index >= MP_ARRAY_SIZE(filter_list) - 1)
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return false;
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const struct af_info *af = filter_list[index];
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*dst = (struct m_obj_desc) {
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.name = af->name,
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.description = af->info,
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.priv_size = af->priv_size,
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.priv_defaults = af->priv_defaults,
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.options = af->options,
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.p = af,
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};
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return true;
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}
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const struct m_obj_list af_obj_list = {
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.get_desc = get_desc,
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.description = "audio filters",
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.aliases = {
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{"force", "format"},
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{0}
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},
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.legacy_hacks = true, // many filters have custom option parsing
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};
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static bool af_config_equals(struct mp_audio *a, struct mp_audio *b)
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{
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return a->format == b->format
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&& mp_chmap_equals(&a->channels, &b->channels)
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&& a->rate == b->rate;
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}
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static void af_copy_unset_fields(struct mp_audio *dst, struct mp_audio *src)
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{
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if (dst->format == AF_FORMAT_UNKNOWN)
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mp_audio_set_format(dst, src->format);
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if (dst->nch == 0)
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mp_audio_set_channels(dst, &src->channels);
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if (dst->rate == 0)
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dst->rate = src->rate;
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}
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static int input_control(struct af_instance* af, int cmd, void* arg)
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{
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switch (cmd) {
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case AF_CONTROL_REINIT:
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assert(arg == &((struct af_stream *)af->setup)->input);
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return AF_OK;
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}
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return AF_UNKNOWN;
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}
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static int output_control(struct af_instance* af, int cmd, void* arg)
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{
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struct af_stream *s = af->setup;
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struct mp_audio *output = &s->output;
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struct mp_audio *filter_output = &s->filter_output;
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switch (cmd) {
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case AF_CONTROL_REINIT: {
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struct mp_audio *in = arg;
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struct mp_audio orig_in = *in;
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*filter_output = *output;
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af_copy_unset_fields(filter_output, in);
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*in = *filter_output;
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return af_config_equals(in, &orig_in) ? AF_OK : AF_FALSE;
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}
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}
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return AF_UNKNOWN;
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}
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static struct mp_audio *dummy_play(struct af_instance* af, struct mp_audio* data)
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{
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return data;
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}
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/* Function for creating a new filter of type name.The name may
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contain the commandline parameters for the filter */
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static struct af_instance *af_create(struct af_stream *s, char *name,
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char **args)
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{
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struct m_obj_desc desc;
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if (!m_obj_list_find(&desc, &af_obj_list, bstr0(name))) {
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mp_tmsg(MSGT_VFILTER, MSGL_ERR,
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"Couldn't find audio filter '%s'.\n", name);
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return NULL;
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}
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const struct af_info *info = desc.p;
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/* Make sure that the filter is not already in the list if it is
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non-reentrant */
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if (info->flags & AF_FLAGS_NOT_REENTRANT) {
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for (struct af_instance *cur = s->first; cur; cur = cur->next) {
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if (cur->info == info) {
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mp_msg(MSGT_AFILTER, MSGL_ERR, "[libaf] There can only be one "
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"instance of the filter '%s' in each stream\n", name);
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return NULL;
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}
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}
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}
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mp_msg(MSGT_AFILTER, MSGL_V, "[libaf] Adding filter %s \n", name);
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struct af_instance *af = talloc_zero(NULL, struct af_instance);
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*af = (struct af_instance) {
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.info = info,
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.mul = 1,
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.data = talloc_zero(af, struct mp_audio),
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};
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struct m_config *config = m_config_from_obj_desc(af, &desc);
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if (m_config_apply_defaults(config, name, s->opts->af_defs) < 0)
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goto error;
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if (m_config_initialize_obj(config, &desc, &af->priv, &args) < 0)
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goto error;
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// Initialize the new filter
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if (af->info->open(af) != AF_OK)
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goto error;
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if (args && af->control) {
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// Single option string for old filters
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char *opts = (char *)args; // m_config_initialize_obj did this
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assert(!af->priv);
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if (af->control(af, AF_CONTROL_COMMAND_LINE, opts) <= AF_ERROR)
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goto error;
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}
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return af;
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error:
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mp_msg(MSGT_AFILTER, MSGL_ERR,
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"[libaf] Couldn't create or open audio filter '%s'\n", name);
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talloc_free(af);
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return NULL;
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}
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/* Create and insert a new filter of type name before the filter in the
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argument. This function can be called during runtime, the return
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value is the new filter */
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static struct af_instance *af_prepend(struct af_stream *s,
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struct af_instance *af,
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char *name, char **args)
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{
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if (!af)
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af = s->last;
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if (af == s->first)
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af = s->first->next;
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// Create the new filter and make sure it is OK
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struct af_instance *new = af_create(s, name, args);
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if (!new)
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return NULL;
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// Update pointers
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new->next = af;
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new->prev = af->prev;
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af->prev = new;
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new->prev->next = new;
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return new;
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}
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/* Create and insert a new filter of type name after the filter in the
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argument. This function can be called during runtime, the return
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value is the new filter */
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static struct af_instance *af_append(struct af_stream *s,
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struct af_instance *af,
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char *name, char **args)
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{
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if (!af)
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af = s->first;
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if (af == s->last)
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af = s->last->prev;
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// Create the new filter and make sure it is OK
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struct af_instance *new = af_create(s, name, args);
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if (!new)
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return NULL;
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// Update pointers
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new->prev = af;
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new->next = af->next;
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af->next = new;
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new->next->prev = new;
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return new;
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}
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// Uninit and remove the filter "af"
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static void af_remove(struct af_stream *s, struct af_instance *af)
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{
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if (!af)
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return;
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if (af == s->first || af == s->last)
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return;
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// Print friendly message
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mp_msg(MSGT_AFILTER, MSGL_V, "[libaf] Removing filter %s \n",
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af->info->name);
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// Detach pointers
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af->prev->next = af->next;
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af->next->prev = af->prev;
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if (af->uninit)
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af->uninit(af);
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talloc_free(af);
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}
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static void remove_auto_inserted_filters(struct af_stream *s)
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{
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repeat:
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for (struct af_instance *af = s->first; af; af = af->next) {
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if (af->auto_inserted) {
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af_remove(s, af);
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goto repeat;
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}
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}
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}
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static void af_print_filter_chain(struct af_stream *s, struct af_instance *at,
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int msg_level)
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{
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mp_msg(MSGT_AFILTER, msg_level, "Audio filter chain:\n");
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struct af_instance *af = s->first;
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while (af) {
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mp_msg(MSGT_AFILTER, msg_level, " [%s] ", af->info->name);
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if (af->data) {
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char *info = mp_audio_config_to_str(af->data);
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mp_msg(MSGT_AFILTER, msg_level, "%s", info);
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talloc_free(info);
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}
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if (af == at)
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mp_msg(MSGT_AFILTER, msg_level, " <-");
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mp_msg(MSGT_AFILTER, msg_level, "\n");
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af = af->next;
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}
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mp_msg(MSGT_AFILTER, msg_level, " [ao] ");
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char *info = mp_audio_config_to_str(&s->output);
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mp_msg(MSGT_AFILTER, msg_level, "%s\n", info);
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talloc_free(info);
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}
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static int af_count_filters(struct af_stream *s)
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{
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int count = 0;
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for (struct af_instance *af = s->first; af; af = af->next)
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count++;
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return count;
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}
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// Finds the first conversion filter on the way from srcfmt to dstfmt.
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// Conversions form a DAG: each node is a format/filter pair, and possible
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// conversions are edges. We search the DAG for the shortest path.
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// Some cases visit the same filter multiple times, but with different formats
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// (like u24le->s8), so one node per format or filter separate is not enough.
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// Returns the filter and dest. format for the first conversion step.
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// (So we know what conversion filter with what format to insert next.)
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static char *af_find_conversion_filter(int srcfmt, int *dstfmt)
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{
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#define NUM_FMT 64
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#define NUM_FILT 32
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#define NUM_NODES (NUM_FMT * NUM_FILT)
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for (int n = 0; filter_list[n]; n++)
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assert(n < NUM_FILT);
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for (int n = 0; af_fmtstr_table[n].format; n++)
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assert(n < NUM_FMT);
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bool visited[NUM_NODES] = {0};
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unsigned char distance[NUM_NODES];
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short previous[NUM_NODES] = {0};
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for (int n = 0; n < NUM_NODES; n++) {
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distance[n] = 255;
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if (af_fmtstr_table[n % NUM_FMT].format == srcfmt)
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distance[n] = 0;
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}
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while (1) {
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int next = -1;
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for (int n = 0; n < NUM_NODES; n++) {
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if (!visited[n] && (next < 0 || (distance[n] < distance[next])))
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next = n;
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}
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if (next < 0 || distance[next] == 255)
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return NULL;
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visited[next] = true;
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int fmt = next % NUM_FMT;
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if (af_fmtstr_table[fmt].format == *dstfmt) {
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// Best match found
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for (int cur = next; cur >= 0; cur = previous[cur] - 1) {
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if (distance[cur] == 1) {
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*dstfmt = af_fmtstr_table[cur % NUM_FMT].format;
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return (char *)filter_list[cur / NUM_FMT]->name;
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}
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}
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return NULL;
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}
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for (int n = 0; filter_list[n]; n++) {
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struct af_info *af = filter_list[n];
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if (!af->test_conversion)
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continue;
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for (int i = 0; af_fmtstr_table[i].format; i++) {
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if (i != fmt && af->test_conversion(af_fmtstr_table[fmt].format,
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af_fmtstr_table[i].format))
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{
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int other = n * NUM_FMT + i;
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int ndist = distance[next] + 1;
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if (ndist < distance[other]) {
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distance[other] = ndist;
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previous[other] = next + 1;
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}
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}
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}
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}
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}
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assert(0);
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#undef NUM_FMT
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#undef NUM_FILT
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#undef NODE_N
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}
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static bool af_is_conversion_filter(struct af_instance *af)
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{
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return af && af->info->test_conversion != NULL;
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}
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// in is what af can take as input - insert a conversion filter if the actual
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// input format doesn't match what af expects.
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// Returns:
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// AF_OK: must call af_reinit() or equivalent, format matches (or is closer)
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// AF_FALSE: nothing was changed, format matches
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// else: error
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static int af_fix_format_conversion(struct af_stream *s,
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struct af_instance **p_af,
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struct mp_audio in)
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{
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int rv;
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struct af_instance *af = *p_af;
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struct af_instance *prev = af->prev;
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struct mp_audio actual = *prev->data;
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if (actual.format == in.format)
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return AF_FALSE;
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int dstfmt = in.format;
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char *filter = af_find_conversion_filter(actual.format, &dstfmt);
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if (!filter)
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return AF_ERROR;
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if (strcmp(filter, prev->info->name) == 0) {
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if (prev->control(prev, AF_CONTROL_SET_FORMAT, &dstfmt) == AF_OK) {
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*p_af = prev;
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return AF_OK;
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}
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}
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struct af_instance *new = af_prepend(s, af, filter, NULL);
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if (new == NULL)
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return AF_ERROR;
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new->auto_inserted = true;
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if (AF_OK != (rv = new->control(new, AF_CONTROL_SET_FORMAT, &dstfmt)))
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return rv;
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*p_af = new;
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return AF_OK;
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}
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// same as af_fix_format_conversion - only wrt. channels
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static int af_fix_channels(struct af_stream *s, struct af_instance **p_af,
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struct mp_audio in)
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{
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int rv;
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struct af_instance *af = *p_af;
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struct af_instance *prev = af->prev;
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struct mp_audio actual = *prev->data;
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if (mp_chmap_equals(&actual.channels, &in.channels))
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return AF_FALSE;
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if (prev->control(prev, AF_CONTROL_SET_CHANNELS, &in.channels) == AF_OK) {
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*p_af = prev;
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return AF_OK;
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}
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char *filter = "lavrresample";
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struct af_instance *new = af_prepend(s, af, filter, NULL);
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if (new == NULL)
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return AF_ERROR;
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new->auto_inserted = true;
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if (AF_OK != (rv = new->control(new, AF_CONTROL_SET_CHANNELS, &in.channels)))
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return rv;
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*p_af = new;
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return AF_OK;
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}
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static int af_fix_rate(struct af_stream *s, struct af_instance **p_af,
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struct mp_audio in)
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{
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int rv;
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struct af_instance *af = *p_af;
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struct af_instance *prev = af->prev;
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struct mp_audio actual = *prev->data;
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if (actual.rate == in.rate)
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return AF_FALSE;
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if (prev->control(prev, AF_CONTROL_SET_RESAMPLE_RATE, &in.rate) == AF_OK) {
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*p_af = prev;
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return AF_OK;
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}
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char *filter = "lavrresample";
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struct af_instance *new = af_prepend(s, af, filter, NULL);
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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_msg(MSGT_AFILTER, MSGL_ERR, "[libaf] 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_msg(MSGT_AFILTER, MSGL_ERR, "[libaf] 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 MPOpts *opts)
|
|
{
|
|
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,
|
|
.play = dummy_play,
|
|
.setup = 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,
|
|
.play = dummy_play,
|
|
.setup = s,
|
|
.data = &s->filter_output,
|
|
.mul = 1.0,
|
|
};
|
|
s->first->next = s->last;
|
|
s->last->prev = s->first;
|
|
s->opts = opts;
|
|
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_msg(MSGT_AFILTER, MSGL_ERR, "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.
|
|
* Warning: input (audio data and struct fields) will be overwritten. */
|
|
struct mp_audio *af_play(struct af_stream *s, struct mp_audio *data)
|
|
{
|
|
struct af_instance *af = s->first;
|
|
assert(mp_audio_config_equals(af->data, data));
|
|
// Iterate through all filters
|
|
while (af) {
|
|
data = af->play(af, data);
|
|
if (!data)
|
|
return NULL;
|
|
assert(mp_audio_config_equals(af->data, data));
|
|
af = af->next;
|
|
}
|
|
return data;
|
|
}
|
|
|
|
// 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);
|
|
}
|