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97 lines
3.0 KiB
97 lines
3.0 KiB
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "a2dp_sbc_decoder"
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#include "a2dp_sbc_decoder.h"
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#include <base/logging.h>
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#include "embdrv/sbc/decoder/include/oi_codec_sbc.h"
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#include "embdrv/sbc/decoder/include/oi_status.h"
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#include "osi/include/log.h"
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typedef struct {
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OI_CODEC_SBC_DECODER_CONTEXT decoder_context;
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uint32_t context_data[CODEC_DATA_WORDS(2, SBC_CODEC_FAST_FILTER_BUFFERS)];
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int16_t decode_buf[15 * SBC_MAX_SAMPLES_PER_FRAME * SBC_MAX_CHANNELS];
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decoded_data_callback_t decode_callback;
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} tA2DP_SBC_DECODER_CB;
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static tA2DP_SBC_DECODER_CB a2dp_sbc_decoder_cb;
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bool A2DP_LoadDecoderSbc(void) {
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// Nothing to do - the library is statically linked
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return true;
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}
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void A2DP_UnloadDecoderSbc(void) { a2dp_sbc_decoder_cleanup(); }
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bool a2dp_sbc_decoder_init(decoded_data_callback_t decode_callback) {
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OI_STATUS status = OI_CODEC_SBC_DecoderReset(
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&a2dp_sbc_decoder_cb.decoder_context, a2dp_sbc_decoder_cb.context_data,
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sizeof(a2dp_sbc_decoder_cb.context_data), 2, 2, false);
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if (!OI_SUCCESS(status)) {
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LOG_ERROR("%s: OI_CODEC_SBC_DecoderReset failed with error code %d",
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__func__, status);
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return false;
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}
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a2dp_sbc_decoder_cb.decode_callback = decode_callback;
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return true;
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}
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void a2dp_sbc_decoder_cleanup(void) {
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// Do nothing.
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}
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bool a2dp_sbc_decoder_decode_packet(BT_HDR* p_buf) {
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uint8_t* data = p_buf->data + p_buf->offset;
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size_t data_size = p_buf->len;
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if (data_size == 0) {
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LOG_ERROR("%s: Empty packet", __func__);
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return false;
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}
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size_t num_frames = data[0] & 0xf;
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data += 1;
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data_size -= 1;
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const OI_BYTE* oi_data = data;
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uint32_t oi_size = data_size;
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size_t out_avail = sizeof(a2dp_sbc_decoder_cb.decode_buf);
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int16_t* out_ptr = a2dp_sbc_decoder_cb.decode_buf;
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for (size_t i = 0; i < num_frames; ++i) {
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uint32_t out_size = out_avail;
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OI_STATUS status =
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OI_CODEC_SBC_DecodeFrame(&a2dp_sbc_decoder_cb.decoder_context, &oi_data,
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&oi_size, out_ptr, &out_size);
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if (!OI_SUCCESS(status)) {
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LOG_ERROR("%s: Decoding failure: %d", __func__, status);
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return false;
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}
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out_avail -= out_size;
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out_ptr += out_size / sizeof(*out_ptr);
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}
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size_t out_used =
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(out_ptr - a2dp_sbc_decoder_cb.decode_buf) * sizeof(*out_ptr);
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a2dp_sbc_decoder_cb.decode_callback(
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reinterpret_cast<uint8_t*>(a2dp_sbc_decoder_cb.decode_buf), out_used);
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return true;
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}
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