hfp_codec.c (759481344a7bcec120864fddd1e20ef1ccb99ff1) hfp_codec.c (f0d1308510b802e387477715d74ec3ad1f42180a)
1/*
2 * Copyright (C) 2023 BlueKitchen GmbH
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright

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108 memset(hfp_codec, 0, sizeof(hfp_codec_t));
109 hfp_h2_framing_init(&hfp_codec->h2_framing);
110 hfp_codec_reset_sco_buffer(hfp_codec);
111 hfp_codec->samples_per_frame = 240;
112 hfp_codec->encode = &hfp_codec_encode_lc3swb;
113 // init lc3 encoder
114 hfp_codec->lc3_encoder = lc3_encoder;
115 hfp_codec->lc3_encoder_context = lc3_encoder_context;
1/*
2 * Copyright (C) 2023 BlueKitchen GmbH
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright

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108 memset(hfp_codec, 0, sizeof(hfp_codec_t));
109 hfp_h2_framing_init(&hfp_codec->h2_framing);
110 hfp_codec_reset_sco_buffer(hfp_codec);
111 hfp_codec->samples_per_frame = 240;
112 hfp_codec->encode = &hfp_codec_encode_lc3swb;
113 // init lc3 encoder
114 hfp_codec->lc3_encoder = lc3_encoder;
115 hfp_codec->lc3_encoder_context = lc3_encoder_context;
116 hfp_codec->lc3_encoder->configure(&hfp_codec->lc3_encoder_context, 32000, BTSTACK_LC3_FRAME_DURATION_7500US, LC3_SWB_OCTETS_PER_FRAME);
116 hfp_codec->lc3_encoder->configure(hfp_codec->lc3_encoder_context, 32000, BTSTACK_LC3_FRAME_DURATION_7500US, LC3_SWB_OCTETS_PER_FRAME);
117}
118#endif
119
120bool hfp_codec_can_encode_audio_frame_now(const hfp_codec_t * hfp_codec){
121 return hfp_codec->write_pos <= SCO_FRAME_SIZE;
122}
123
124uint16_t hfp_codec_num_audio_samples_per_frame(const hfp_codec_t * hfp_codec){

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134 // Final padding to use SCO_FRAME_SIZE bytes
135 hfp_codec->sco_packet[hfp_codec->write_pos++] = 0;
136}
137#endif
138
139#ifdef ENABLE_HFP_SUPER_WIDE_BAND_SPEECH
140static void hfp_codec_encode_lc3swb(hfp_codec_t * hfp_codec, int16_t * pcm_samples){
141 // Encode LC3 Frame
117}
118#endif
119
120bool hfp_codec_can_encode_audio_frame_now(const hfp_codec_t * hfp_codec){
121 return hfp_codec->write_pos <= SCO_FRAME_SIZE;
122}
123
124uint16_t hfp_codec_num_audio_samples_per_frame(const hfp_codec_t * hfp_codec){

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134 // Final padding to use SCO_FRAME_SIZE bytes
135 hfp_codec->sco_packet[hfp_codec->write_pos++] = 0;
136}
137#endif
138
139#ifdef ENABLE_HFP_SUPER_WIDE_BAND_SPEECH
140static void hfp_codec_encode_lc3swb(hfp_codec_t * hfp_codec, int16_t * pcm_samples){
141 // Encode LC3 Frame
142 hfp_codec->lc3_encoder->encode_signed_16(&hfp_codec->lc3_encoder_context, pcm_samples, 1, &hfp_codec->sco_packet[hfp_codec->write_pos]);
142 hfp_codec->lc3_encoder->encode_signed_16(hfp_codec->lc3_encoder_context, pcm_samples, 1, &hfp_codec->sco_packet[hfp_codec->write_pos]);
143 hfp_codec->write_pos += LC3_SWB_OCTETS_PER_FRAME;
144}
145#endif
146
147void hfp_codec_encode_audio_frame(hfp_codec_t * hfp_codec, int16_t * pcm_samples){
148 btstack_assert(hfp_codec_can_encode_audio_frame_now(hfp_codec));
149 // Synchronization Header H2
150 hfp_h2_framing_add_header(&hfp_codec->h2_framing, &hfp_codec->sco_packet[hfp_codec->write_pos]);

--- 41 unchanged lines hidden --- 		143 hfp_codec->write_pos += LC3_SWB_OCTETS_PER_FRAME;
144}
145#endif
146
147void hfp_codec_encode_audio_frame(hfp_codec_t * hfp_codec, int16_t * pcm_samples){
148 btstack_assert(hfp_codec_can_encode_audio_frame_now(hfp_codec));
149 // Synchronization Header H2
150 hfp_h2_framing_add_header(&hfp_codec->h2_framing, &hfp_codec->sco_packet[hfp_codec->write_pos]);

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