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mpv/audio/decode/dec_audio.h
wm4 1f593beeb4 audio: introduce a new type to hold audio frames
This is pretty pointless, but I believe it allows us to claim that the
new code is not affected by the copyright of the old code. This is
needed, because the original mp_audio struct was written by someone who
has disagreed with LGPL relicensing (it was called af_data at the time,
and was defined in af.h).

The "GPL'ed" struct contents that surive are pretty trivial: just the
data pointer, and some metadata like the format, samplerate, etc. - but
at least in this case, any new code would be extremely similar anyway,
and I'm not really sure whether it's OK to claim different copyright. So
what we do is we just use AVFrame (which of course is LGPL with 100%
certainty), and add some accessors around it to adapt it to mpv
conventions.

Also, this gets rid of some annoying conventions of mp_audio, like the
struct fields that require using an accessor to write to them anyway.

For the most part, this change is only dumb replacements of mp_audio
related functions and fields. One minor actual change is that you can't
allocate the new type on the stack anymore.

Some code still uses mp_audio. All audio filter code will be deleted, so
it makes no sense to convert this code. (Audio filters which are LGPL
and which we keep will have to be ported to a new filter infrastructure
anyway.) player/audio.c uses it because it interacts with the old filter
code. push.c has some complex use of mp_audio and mp_audio_buffer, but
this and pull.c will most likely be rewritten to do something else.
2017-08-16 21:10:54 +02:00

67 lines
1.9 KiB
C

/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MPLAYER_DEC_AUDIO_H
#define MPLAYER_DEC_AUDIO_H
#include "audio/chmap.h"
#include "audio/aframe.h"
#include "demux/demux.h"
#include "demux/stheader.h"
struct mp_decoder_list;
struct dec_audio {
struct mp_log *log;
struct MPOpts *opts;
struct mpv_global *global;
const struct ad_functions *ad_driver;
struct sh_stream *header;
struct mp_codec_params *codec;
char *decoder_desc;
bool try_spdif;
struct mp_recorder_sink *recorder_sink;
// For free use by the ad_driver
void *priv;
// Strictly internal (dec_audio.c).
double pts; // endpts of previous frame
double start, end;
struct demux_packet *packet;
struct demux_packet *new_segment;
struct mp_aframe *current_frame;
int current_state;
};
struct mp_decoder_list *audio_decoder_list(void);
int audio_init_best_codec(struct dec_audio *d_audio);
void audio_uninit(struct dec_audio *d_audio);
void audio_work(struct dec_audio *d_audio);
int audio_get_frame(struct dec_audio *d_audio, struct mp_aframe **out_frame);
void audio_reset_decoding(struct dec_audio *d_audio);
// ad_spdif.c
struct mp_decoder_list *select_spdif_codec(const char *codec, const char *pref);
#endif /* MPLAYER_DEC_AUDIO_H */