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c05c6f9eee
The encoding and decoding pipeline are essentially identical: both push data in via an appsrc, route it through a codec-specific (opaque) element, and finally pull data out of an appsink. The code already makes it impossible to have an encoding and decoding pipeline simultaneously set up in `gst_info`, and converting `bool for_encoding` to a tri-state (encode, decode, or both) would be messy; particularly when encoding and decoding could possibly differ in format. This change removes a swath of code and removes the possibility of misusing `enc_` or `dec_` in the wrong place (ie. after copying a bit of code and forgetting to rename one or two). When bidirectional codecs come online a second codec instance (`gst_info`) can simply be created and controlled independently. Part-of: <https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/487>
57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
/***
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This file is part of PulseAudio.
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Copyright (C) 2020 Asymptotic <sanchayan@asymptotic.io>
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
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***/
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#include <gst/gst.h>
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#include <gst/app/gstappsrc.h>
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#include <gst/app/gstappsink.h>
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#include <gst/base/gstadapter.h>
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#include <pulsecore/fdsem.h>
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enum a2dp_codec_type {
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AAC = 0,
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APTX,
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APTX_HD,
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LDAC_EQMID_HQ,
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LDAC_EQMID_SQ,
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LDAC_EQMID_MQ
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};
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struct gst_info {
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pa_core *core;
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pa_sample_spec *ss;
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enum a2dp_codec_type codec_type;
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union {
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const a2dp_aac_t *aac_config;
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const a2dp_aptx_t *aptx_config;
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const a2dp_aptx_hd_t *aptx_hd_config;
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const a2dp_ldac_t *ldac_config;
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} a2dp_codec_t;
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GstElement *app_src, *app_sink;
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GstElement *pipeline;
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GstAdapter *sink_adapter;
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pa_fdsem *sample_ready_fdsem;
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uint16_t seq_num;
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};
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bool gst_codec_init(struct gst_info *info, bool for_encoding, GstElement *transcoder);
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size_t gst_transcode_buffer(void *codec_info, const uint8_t *input_buffer, size_t input_size, uint8_t *output_buffer, size_t output_size, size_t *processed);
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void gst_codec_deinit(void *codec_info);
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