mirror of https://github.com/mpv-player/mpv
823 lines
25 KiB
C
823 lines
25 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv 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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* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
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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 "common/common.h"
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#include "common/global.h"
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#include "options/m_option.h"
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#include "options/m_config.h"
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#include "audio/audio_buffer.h"
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#include "af.h"
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// Static list of filters
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extern const struct af_info af_info_delay;
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extern const struct af_info af_info_channels;
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extern const struct af_info af_info_format;
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extern const struct af_info af_info_volume;
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extern const struct af_info af_info_equalizer;
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extern const struct af_info af_info_pan;
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extern const struct af_info af_info_drc;
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extern const struct af_info af_info_lavcac3enc;
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extern const struct af_info af_info_lavrresample;
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extern const struct af_info af_info_scaletempo;
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extern const struct af_info af_info_bs2b;
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extern const struct af_info af_info_lavfi;
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extern const struct af_info af_info_rubberband;
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static const struct af_info *const filter_list[] = {
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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_drc,
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&af_info_lavcac3enc,
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&af_info_lavrresample,
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#if HAVE_RUBBERBAND
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&af_info_rubberband,
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#endif
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&af_info_scaletempo,
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&af_info_lavfi,
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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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};
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static void af_forget_frames(struct af_instance *af)
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{
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for (int n = 0; n < af->num_out_queued; n++)
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talloc_free(af->out_queued[n]);
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af->num_out_queued = 0;
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}
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static void af_chain_forget_frames(struct af_stream *s)
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{
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for (struct af_instance *cur = s->first; cur; cur = cur->next)
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af_forget_frames(cur);
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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->priv)->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->priv;
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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 mp_audio_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 int dummy_filter(struct af_instance *af, struct mp_audio *frame)
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{
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af_add_output_frame(af, frame);
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return 0;
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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_ERR(s, "Couldn't find audio filter '%s'.\n", name);
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return NULL;
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}
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MP_VERBOSE(s, "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 = desc.p,
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.data = talloc_zero(af, struct mp_audio),
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.log = mp_log_new(af, s->log, name),
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.opts = s->opts,
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.replaygain_data = s->replaygain_data,
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.out_pool = mp_audio_pool_create(af),
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};
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struct m_config *config = m_config_from_obj_desc(af, s->log, &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_set_obj_params(config, args) < 0)
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goto error;
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af->priv = config->optstruct;
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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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return af;
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error:
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MP_ERR(s, "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_VERBOSE(s, "Removing filter %s \n", 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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af_forget_frames(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(s, 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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char b[128] = {0};
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mp_snprintf_cat(b, sizeof(b), " [%s] ", af->info->name);
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if (af->data)
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mp_snprintf_cat(b, sizeof(b), "%s", mp_audio_config_to_str(af->data));
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if (af == at)
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mp_snprintf_cat(b, sizeof(b), " <-");
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MP_MSG(s, msg_level, "%s\n", b);
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af = af->next;
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}
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MP_MSG(s, msg_level, " [ao] %s\n", mp_audio_config_to_str(&s->output));
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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 && strcmp(af->info->name, "lavrresample") == 0;
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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 = "lavrresample";
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if (!af_lavrresample_test_conversion(actual.format, dstfmt))
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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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return AF_ERROR;
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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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af_remove(s, new);
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return rv;
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}
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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)
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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_RESAMPLE_RATE, &in.rate)))
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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 void reset_formats(struct af_stream *s)
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{
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for (struct af_instance *af = s->first; af; af = af->next) {
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af->control(af, AF_CONTROL_SET_RESAMPLE_RATE, &(int){0});
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af->control(af, AF_CONTROL_SET_CHANNELS, &(struct mp_chmap){0});
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af->control(af, AF_CONTROL_SET_FORMAT, &(int){0});
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}
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}
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// Return AF_OK on success or AF_ERROR on failure.
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// Warning:
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// A failed af_reinit() leaves the audio chain behind in a useless, broken
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// state (for example, format filters that were tentatively inserted stay
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// inserted).
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// In that case, you should always rebuild the filter chain, or abort.
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static int af_reinit(struct af_stream *s)
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{
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remove_auto_inserted_filters(s);
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af_chain_forget_frames(s);
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reset_formats(s);
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s->first->fmt_in = s->first->fmt_out = s->input;
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// Start with the second filter, as the first filter is the special input
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// filter which needs no initialization.
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struct af_instance *af = s->first->next;
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// Up to 4 retries per filter (channel, rate, format conversions)
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int max_retry = 4;
|
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int retry = 0;
|
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while (af) {
|
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if (retry >= max_retry)
|
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goto negotiate_error;
|
|
|
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// Check if this is the first filter
|
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struct mp_audio in = *af->prev->data;
|
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// Reset just in case...
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mp_audio_set_null_data(&in);
|
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|
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if (!mp_audio_config_valid(&in))
|
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goto error;
|
|
|
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af->fmt_in = in;
|
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int rv = af->control(af, AF_CONTROL_REINIT, &in);
|
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if (rv == AF_OK && !mp_audio_config_equals(&in, af->prev->data))
|
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rv = AF_FALSE; // conversion filter needed
|
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switch (rv) {
|
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case AF_OK:
|
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if (!mp_audio_config_valid(af->data))
|
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goto error;
|
|
af->fmt_out = *af->data;
|
|
af = af->next;
|
|
break;
|
|
case AF_FALSE: { // Configuration filter is needed
|
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if (af_fix_channels(s, &af, in) == AF_OK) {
|
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retry++;
|
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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;
|
|
}
|
|
// If the format conversion is (probably) caused by spdif, then
|
|
// (as a feature) drop the filter, instead of failing hard.
|
|
int fmt_in1 = af->prev->data->format;
|
|
int fmt_in2 = in.format;
|
|
if (af_fmt_is_valid(fmt_in1) && af_fmt_is_valid(fmt_in2)) {
|
|
bool spd1 = af_fmt_is_spdif(fmt_in1);
|
|
bool spd2 = af_fmt_is_spdif(fmt_in2);
|
|
if (spd1 != spd2 && af->next) {
|
|
MP_WARN(af, "Filter %s apparently cannot be used due to "
|
|
"spdif passthrough - removing it.\n",
|
|
af->info->name);
|
|
struct af_instance *aft = af->prev;
|
|
af_remove(s, af);
|
|
af = aft->next;
|
|
retry++;
|
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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;
|
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break;
|
|
}
|
|
default:
|
|
MP_ERR(s, "Reinitialization did not work, "
|
|
"audio filter '%s' returned error code %i\n",
|
|
af->info->name, rv);
|
|
goto error;
|
|
}
|
|
if (af && !af->auto_inserted)
|
|
retry = 0;
|
|
}
|
|
|
|
/* 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);
|
|
if (mp_audio_config_equals(&s->output, &s->filter_output)) {
|
|
s->initialized = 1;
|
|
af_print_filter_chain(s, NULL, MSGL_V);
|
|
return AF_OK;
|
|
}
|
|
|
|
goto error;
|
|
|
|
negotiate_error:
|
|
MP_ERR(s, "Unable to convert audio input format to output format.\n");
|
|
error:
|
|
s->initialized = -1;
|
|
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);
|
|
af_chain_forget_frames(s);
|
|
s->initialized = 0;
|
|
}
|
|
|
|
struct af_stream *af_new(struct mpv_global *global)
|
|
{
|
|
struct af_stream *s = talloc_zero(NULL, struct af_stream);
|
|
s->log = mp_log_new(s, global->log, "!af");
|
|
|
|
static const struct af_info in = { .name = "in" };
|
|
s->first = talloc(s, struct af_instance);
|
|
*s->first = (struct af_instance) {
|
|
.info = &in,
|
|
.log = s->log,
|
|
.control = input_control,
|
|
.filter_frame = dummy_filter,
|
|
.priv = s,
|
|
.data = &s->input,
|
|
};
|
|
|
|
static const struct af_info out = { .name = "out" };
|
|
s->last = talloc(s, struct af_instance);
|
|
*s->last = (struct af_instance) {
|
|
.info = &out,
|
|
.log = s->log,
|
|
.control = output_control,
|
|
.filter_frame = dummy_filter,
|
|
.priv = s,
|
|
.data = &s->filter_output,
|
|
};
|
|
|
|
s->first->next = s->last;
|
|
s->last->prev = s->first;
|
|
s->opts = global->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 preferred 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)
|
|
{
|
|
// 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++) {
|
|
struct af_instance *af =
|
|
af_prepend(s, s->last, list[i].name, list[i].attribs);
|
|
if (!af) {
|
|
af_uninit(s);
|
|
s->initialized = -1;
|
|
return -1;
|
|
}
|
|
af->label = talloc_strdup(af, list[i].label);
|
|
}
|
|
}
|
|
|
|
if (af_reinit(s) != AF_OK) {
|
|
// Something is stuffed audio out will not work
|
|
MP_ERR(s, "Could not create audio filter chain.\n");
|
|
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 *label,
|
|
char **args)
|
|
{
|
|
assert(label);
|
|
|
|
if (af_find_by_label(s, label))
|
|
return NULL;
|
|
|
|
struct af_instance *new;
|
|
// 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;
|
|
new->label = talloc_strdup(new, label);
|
|
|
|
// Reinitialize the filter list
|
|
if (af_reinit(s) != AF_OK) {
|
|
af_remove_by_label(s, label);
|
|
return NULL;
|
|
}
|
|
return af_find_by_label(s, label);
|
|
}
|
|
|
|
struct af_instance *af_find_by_label(struct af_stream *s, char *label)
|
|
{
|
|
for (struct af_instance *af = s->first; af; af = af->next) {
|
|
if (af->label && strcmp(af->label, label) == 0)
|
|
return af;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* Remove the first filter that matches this name. Return number of filters
|
|
* removed (0, 1), or a negative error code if reinit after removing failed.
|
|
*/
|
|
int af_remove_by_label(struct af_stream *s, char *label)
|
|
{
|
|
struct af_instance *af = af_find_by_label(s, label);
|
|
if (!af)
|
|
return 0;
|
|
af_remove(s, af);
|
|
if (af_reinit(s) != AF_OK) {
|
|
af_uninit(s);
|
|
af_init(s);
|
|
return -1;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* 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;
|
|
for (int n = 0; n < af->num_out_queued; n++)
|
|
delay += af->out_queued[n]->samples / (double)af->data->rate;
|
|
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);
|
|
}
|
|
|
|
int af_control_by_label(struct af_stream *s, int cmd, void *arg, bstr label)
|
|
{
|
|
char *label_str = bstrdup0(NULL, label);
|
|
struct af_instance *cur = af_find_by_label(s, label_str);
|
|
talloc_free(label_str);
|
|
if (cur) {
|
|
return cur->control ? cur->control(cur, cmd, arg) : CONTROL_NA;
|
|
} else {
|
|
return CONTROL_UNKNOWN;
|
|
}
|
|
}
|
|
|
|
int af_send_command(struct af_stream *s, char *label, char *cmd, char *arg)
|
|
{
|
|
char *args[2] = {cmd, arg};
|
|
if (strcmp(label, "all") == 0) {
|
|
af_control_all(s, AF_CONTROL_COMMAND, args);
|
|
return 0;
|
|
} else {
|
|
return af_control_by_label(s, AF_CONTROL_COMMAND, args, bstr0(label));
|
|
}
|
|
}
|
|
|
|
// Used by filters to add a filtered frame to the output queue.
|
|
// Ownership of frame is transferred from caller to the filter chain.
|
|
void af_add_output_frame(struct af_instance *af, struct mp_audio *frame)
|
|
{
|
|
if (frame) {
|
|
assert(mp_audio_config_equals(&af->fmt_out, frame));
|
|
MP_TARRAY_APPEND(af, af->out_queued, af->num_out_queued, frame);
|
|
}
|
|
}
|
|
|
|
static bool af_has_output_frame(struct af_instance *af)
|
|
{
|
|
if (!af->num_out_queued && af->filter_out) {
|
|
if (af->filter_out(af) < 0)
|
|
MP_ERR(af, "Error filtering frame.\n");
|
|
}
|
|
return af->num_out_queued > 0;
|
|
}
|
|
|
|
static struct mp_audio *af_dequeue_output_frame(struct af_instance *af)
|
|
{
|
|
struct mp_audio *res = NULL;
|
|
if (af_has_output_frame(af)) {
|
|
res = af->out_queued[0];
|
|
MP_TARRAY_REMOVE_AT(af->out_queued, af->num_out_queued, 0);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static void read_remaining(struct af_instance *af)
|
|
{
|
|
int num_frames;
|
|
do {
|
|
num_frames = af->num_out_queued;
|
|
if (!af->filter_out || af->filter_out(af) < 0)
|
|
break;
|
|
} while (num_frames != af->num_out_queued);
|
|
}
|
|
|
|
static int af_do_filter(struct af_instance *af, struct mp_audio *frame)
|
|
{
|
|
if (frame)
|
|
assert(mp_audio_config_equals(&af->fmt_in, frame));
|
|
int r = af->filter_frame(af, frame);
|
|
if (r < 0)
|
|
MP_ERR(af, "Error filtering frame.\n");
|
|
return r;
|
|
}
|
|
|
|
// Input a frame into the filter chain. Ownership of frame is transferred.
|
|
// Return >= 0 on success, < 0 on failure (even if output frames were produced)
|
|
int af_filter_frame(struct af_stream *s, struct mp_audio *frame)
|
|
{
|
|
assert(frame);
|
|
if (s->initialized < 1) {
|
|
talloc_free(frame);
|
|
return -1;
|
|
}
|
|
return af_do_filter(s->first, frame);
|
|
}
|
|
|
|
// Output the next queued frame (if any) from the full filter chain.
|
|
// The frame can be retrieved with af_read_output_frame().
|
|
// eof: if set, assume there's no more input i.e. af_filter_frame() will
|
|
// not be called (until reset) - flush all internally delayed frames
|
|
// returns: -1: error, 0: no output, 1: output available
|
|
int af_output_frame(struct af_stream *s, bool eof)
|
|
{
|
|
if (s->last->num_out_queued)
|
|
return 1;
|
|
if (s->initialized < 1)
|
|
return -1;
|
|
while (1) {
|
|
struct af_instance *last = NULL;
|
|
for (struct af_instance * cur = s->first; cur; cur = cur->next) {
|
|
// Flush remaining frames on EOF, but do that only if the previous
|
|
// filters have been flushed (i.e. they have no more output).
|
|
if (eof && !last) {
|
|
read_remaining(cur);
|
|
int r = af_do_filter(cur, NULL);
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
if (af_has_output_frame(cur))
|
|
last = cur;
|
|
}
|
|
if (!last)
|
|
return 0;
|
|
if (!last->next)
|
|
return 1;
|
|
int r = af_do_filter(last->next, af_dequeue_output_frame(last));
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
}
|
|
|
|
struct mp_audio *af_read_output_frame(struct af_stream *s)
|
|
{
|
|
if (!s->last->num_out_queued)
|
|
af_output_frame(s, false);
|
|
return af_dequeue_output_frame(s->last);
|
|
}
|
|
|
|
// Make sure the caller can change data referenced by the frame.
|
|
// Return negative error code on failure (i.e. you can't write).
|
|
int af_make_writeable(struct af_instance *af, struct mp_audio *frame)
|
|
{
|
|
return mp_audio_pool_make_writeable(af->out_pool, frame);
|
|
}
|
|
|
|
void af_seek_reset(struct af_stream *s)
|
|
{
|
|
af_control_all(s, AF_CONTROL_RESET, NULL);
|
|
af_chain_forget_frames(s);
|
|
}
|