diff options
Diffstat (limited to 'cras/src/common/cras_sbc_codec.c')
| -rw-r--r-- | cras/src/common/cras_sbc_codec.c | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/cras/src/common/cras_sbc_codec.c b/cras/src/common/cras_sbc_codec.c deleted file mode 100644 index df02b3eb..00000000 --- a/cras/src/common/cras_sbc_codec.c +++ /dev/null @@ -1,201 +0,0 @@ -/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -#include <errno.h> -#include <sbc/sbc.h> -#include <stdlib.h> - -#include "cras_sbc_codec.h" - -/* SBC library encodes one PCM input block to one SBC output block. This - * structure holds related info about the SBC codec. - * Members: - * sbc - The main structure for SBC codec. - * codesize - The size of one PCM input block in bytes. - * frame_length - The size of one SBC output block in bytes. - */ -struct cras_sbc_data { - sbc_t sbc; - unsigned int codesize; - unsigned int frame_length; -}; - -int cras_msbc_decode(struct cras_audio_codec *codec, const void *input, - size_t input_len, void *output, size_t output_len, - size_t *count) -{ - struct cras_sbc_data *data = (struct cras_sbc_data *)codec->priv_data; - size_t written = 0; - ssize_t decoded; - - /* - * Proceed decode when there is buffer left in input and room in - * output. - */ - decoded = sbc_decode(&data->sbc, input, input_len, output, output_len, - &written); - - *count = written; - return decoded; -} - -int cras_msbc_encode(struct cras_audio_codec *codec, const void *input, - size_t input_len, void *output, size_t output_len, - size_t *count) -{ - struct cras_sbc_data *data = (struct cras_sbc_data *)codec->priv_data; - ssize_t written = 0; - ssize_t encoded; - - /* - * Proceed encode when input buffer has at least one input block and - * there is still room in output buffer. - */ - if (input_len < data->codesize) - return -EINVAL; - - encoded = sbc_encode(&data->sbc, input, data->codesize, output, - output_len, &written); - - *count = written; - return encoded; -} - -int cras_sbc_decode(struct cras_audio_codec *codec, const void *input, - size_t input_len, void *output, size_t output_len, - size_t *count) -{ - struct cras_sbc_data *data = (struct cras_sbc_data *)codec->priv_data; - size_t written; - ssize_t decoded; - int processed = 0; - int result = 0; - - /* Proceed decode when there is buffer left in input and room in - * output. - */ - while (input_len > processed && output_len > result) { - decoded = sbc_decode(&data->sbc, input + processed, - input_len - processed, output + result, - output_len - result, &written); - if (decoded <= 0) - break; - - processed += decoded; - result += written; - } - *count = result; - return processed; -} - -int cras_sbc_encode(struct cras_audio_codec *codec, const void *input, - size_t input_len, void *output, size_t output_len, - size_t *count) -{ - struct cras_sbc_data *data = (struct cras_sbc_data *)codec->priv_data; - ssize_t written, encoded; - int processed = 0, result = 0; - - /* Proceed encode when input buffer has at least one input block and - * there is still room in output buffer. - */ - while (input_len - processed >= data->codesize && - output_len >= result) { - encoded = sbc_encode(&data->sbc, input + processed, - data->codesize, output + result, - output_len - result, &written); - if (encoded == -ENOSPC) - break; - else if (encoded < 0) - return encoded; - - processed += encoded; - result += written; - } - *count = result; - return processed; -} - -int cras_sbc_get_codesize(struct cras_audio_codec *codec) -{ - struct cras_sbc_data *data = (struct cras_sbc_data *)codec->priv_data; - return data->codesize; -} - -int cras_sbc_get_frame_length(struct cras_audio_codec *codec) -{ - struct cras_sbc_data *data = (struct cras_sbc_data *)codec->priv_data; - return data->frame_length; -} - -struct cras_audio_codec *cras_msbc_codec_create() -{ - struct cras_audio_codec *codec; - struct cras_sbc_data *data; - - codec = (struct cras_audio_codec *)calloc(1, sizeof(*codec)); - if (!codec) - return NULL; - - codec->priv_data = - (struct cras_sbc_data *)calloc(1, sizeof(struct cras_sbc_data)); - if (!codec->priv_data) { - free(codec); - return NULL; - } - - data = (struct cras_sbc_data *)codec->priv_data; - sbc_init_msbc(&data->sbc, 0L); - data->codesize = sbc_get_codesize(&data->sbc); - data->frame_length = sbc_get_frame_length(&data->sbc); - - codec->decode = cras_msbc_decode; - codec->encode = cras_msbc_encode; - return codec; -} - -struct cras_audio_codec *cras_sbc_codec_create(uint8_t freq, uint8_t mode, - uint8_t subbands, uint8_t alloc, - uint8_t blocks, uint8_t bitpool) -{ - struct cras_audio_codec *codec; - struct cras_sbc_data *data; - - codec = (struct cras_audio_codec *)calloc(1, sizeof(*codec)); - if (!codec) - return NULL; - - codec->priv_data = - (struct cras_sbc_data *)calloc(1, sizeof(struct cras_sbc_data)); - if (!codec->priv_data) - goto create_error; - - data = (struct cras_sbc_data *)codec->priv_data; - sbc_init(&data->sbc, 0L); - data->sbc.endian = SBC_LE; - data->sbc.frequency = freq; - data->sbc.mode = mode; - data->sbc.subbands = subbands; - data->sbc.allocation = alloc; - data->sbc.blocks = blocks; - data->sbc.bitpool = bitpool; - data->codesize = sbc_get_codesize(&data->sbc); - data->frame_length = sbc_get_frame_length(&data->sbc); - - codec->decode = cras_sbc_decode; - codec->encode = cras_sbc_encode; - return codec; - -create_error: - free(codec); - return NULL; -} - -void cras_sbc_codec_destroy(struct cras_audio_codec *codec) -{ - sbc_finish(&((struct cras_sbc_data *)codec->priv_data)->sbc); - free(codec->priv_data); - free(codec); -} |