1/***
2  This file is part of PulseAudio.
3
4  Copyright (C) 2020 Asymptotic <sanchayan@asymptotic.io>
5
6  PulseAudio is free software; you can redistribute it and/or modify
7  it under the terms of the GNU Lesser General Public License as
8  published by the Free Software Foundation; either version 2.1 of the
9  License, or (at your option) any later version.
10
11  PulseAudio is distributed in the hope that it will be useful, but
12  WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  General Public License for more details.
15
16  You should have received a copy of the GNU Lesser General Public
17  License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
18***/
19
20#include <gst/gst.h>
21#include <gst/app/gstappsrc.h>
22#include <gst/app/gstappsink.h>
23#include <gst/base/gstadapter.h>
24#include <pulsecore/fdsem.h>
25
26enum a2dp_codec_type {
27    AAC = 0,
28    APTX,
29    APTX_HD,
30    LDAC_EQMID_HQ,
31    LDAC_EQMID_SQ,
32    LDAC_EQMID_MQ
33};
34
35struct gst_info {
36    pa_core *core;
37    pa_sample_spec *ss;
38    enum a2dp_codec_type codec_type;
39    union {
40        const a2dp_aac_t *aac_config;
41        const a2dp_aptx_t *aptx_config;
42        const a2dp_aptx_hd_t *aptx_hd_config;
43        const a2dp_ldac_t *ldac_config;
44    } a2dp_codec_t;
45
46    /* The appsink element that accumulates encoded/decoded buffers */
47    GstElement *app_sink;
48    GstElement *bin;
49    /* The sink pad to push to-be-encoded/decoded buffers into */
50    GstPad *pad_sink;
51
52    uint16_t seq_num;
53};
54
55bool gst_codec_init(struct gst_info *info, bool for_encoding, GstElement *transcoder);
56size_t gst_transcode_buffer(void *codec_info, uint32_t timestamp, const uint8_t *input_buffer, size_t input_size, uint8_t *output_buffer, size_t output_size, size_t *processed);
57void gst_codec_deinit(void *codec_info);
58