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1865c87ec6
lc3enc: - encodes raw audio into lc3 format - uses the default bitrate property and frame duration from the caps to determine the byte count of the encoded frames if it is not specified in the downstream caps after negotiation - uses the same byte count value for all the channels - all the common session configuration parameters are passed in the src caps lc3dec: - decodes an lc3 encoded audio - sink caps should contain all the common session configuration params - uses frame_duration and frame_bytes (byte count) in the sink caps as parameters along with sample rate and channel count - byte count is same for all the channels Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4376>
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/* GStreamer LC3 Bluetooth LE audio encoder
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* Copyright (C) 2023 Asymptotic Inc. <taruntej@asymptotic.io>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef _GST_LC3ENC_H_
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#define _GST_LC3ENC_H_
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#include <gst/audio/gstaudioencoder.h>
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#include <lc3.h>
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G_BEGIN_DECLS
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#define GST_TYPE_LC3_ENC (gst_lc3_enc_get_type())
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G_DECLARE_FINAL_TYPE (GstLc3Enc, gst_lc3_enc, GST, LC3_ENC, GstAudioEncoder)
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struct _GstLc3Enc
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{
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GstAudioEncoder base;
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lc3_encoder_t *enc_ch;
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enum lc3_pcm_format format;
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int rate;
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int channels;
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int frame_duration_us;
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/* byte count per channel, same for all channels */
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int frame_bytes;
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/* bytes per sample */
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int bpf;
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/* pcm samples per encoded frame */
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int frame_samples;
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gboolean first_frame;
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int pending_bytes;
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};
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struct _GstLc3EncClass
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{
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GstAudioEncoderClass base_class;
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};
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GST_ELEMENT_REGISTER_DECLARE (lc3enc);
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G_END_DECLS
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#endif
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