The "GR-PEACH_Audio_Playback_Sample" is a sample code that can provides high-resolution audio playback of FLAC format files. It also allows the user to audio-playback control functions such as play, pause, and stop by manipulating key switches.
Dependencies: R_BSP TLV320_RBSP USBHost_custom
Note
For a sample program of with LCD Board,
please refer to GR-PEACH_Audio_Playback_7InchLCD_Sample.
Introduction
The "GR-PEACH_Audio_Playback_Sample" is a sample code that can provides high-resolution audio playback of FLAC format files. It also allows the user to audio-playback control functions such as play, pause, and stop by manipulating key switches.
1. Overview of the Sample Code
1.1 Software Block Diagram
Figure 1.1 shows the software block diagram.
1.2 Pin Definitions
Table 1.1 shows the pins that this sample code are to use.
2. Sample Code Operating Environment
This sample code runs in GR-PEACH + the Audio/Camera shield for the GR-PEACH environment. This section explains the functions of the ports that are used by this sample code.
2.1 Operating Environment
Figure 2.1 shows the configuration of the operating environment for running this sample code.
2.2 List of User Operations
A list of user operations on the command line, TFT touch keys, and switch key that the user can perform for this sample code is shown in. Table 2.1.
3. Function Outline
The functions of this sample code are summarized in Table 3.1 to Table 3.3.
3.1 Playback Control
The playback control that the sample code supports include play, pause, stop, skip to next, and skip to previous.
3.2 Trick Play Control
Manipulating "Repeat" alternates between "Repeat mode On" and "Repeat mode Off". The default mode is "Repeat mode On". When the repeat mode is on, the playback of the first song starts after the playback of the last song is finished. When the repeat mode is off, the sample code enters the stopped state after the playback of the last song is finished.
3.3 Acquisition of the Song Information
The information of the song being played is obtained by operating the "Play info" during the playback of the song. Table 3.4 lists the items of information that can be obtained by the "Play info" operation.
3.4 How the Folder Structure is Analyzed
The sample coded analyzes the folder structure in the breadth-first search order. The order in which files are numbered is illustrated in Table 3.5. The sample code does not sort the files by file or folder name.
4.Others
The default setting of serial communication (baud rate etc.) in mbed is shown the following link.
Please refer to the link and change the settings of your PC terminal software.
The default value of baud rate in mbed is 9600, and this application uses baud rate 9600.
https://developer.mbed.org/teams/Renesas/wiki/GR-PEACH-Getting-Started#install-the-usb-serial-communication
decode/dec_flac.cpp@6:df19c3e787ca, 2017-03-31 (annotated)
- Committer:
- Osamu Nakamura
- Date:
- Fri Mar 31 14:00:23 2017 +0900
- Revision:
- 6:df19c3e787ca
- Parent:
- 0:ee40da884cfc
Introduced mbedOS 5 instead of mbedOS 2 (classic)
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
dkato | 0:ee40da884cfc | 1 | /******************************************************************************* |
dkato | 0:ee40da884cfc | 2 | * DISCLAIMER |
dkato | 0:ee40da884cfc | 3 | * This software is supplied by Renesas Electronics Corporation and is only |
dkato | 0:ee40da884cfc | 4 | * intended for use with Renesas products. No other uses are authorized. This |
dkato | 0:ee40da884cfc | 5 | * software is owned by Renesas Electronics Corporation and is protected under |
dkato | 0:ee40da884cfc | 6 | * all applicable laws, including copyright laws. |
dkato | 0:ee40da884cfc | 7 | * THIS SOFTWARE IS PROVIDED "AS IS" AND RENESAS MAKES NO WARRANTIES REGARDING |
dkato | 0:ee40da884cfc | 8 | * THIS SOFTWARE, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING BUT NOT |
dkato | 0:ee40da884cfc | 9 | * LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE |
dkato | 0:ee40da884cfc | 10 | * AND NON-INFRINGEMENT. ALL SUCH WARRANTIES ARE EXPRESSLY DISCLAIMED. |
dkato | 0:ee40da884cfc | 11 | * TO THE MAXIMUM EXTENT PERMITTED NOT PROHIBITED BY LAW, NEITHER RENESAS |
dkato | 0:ee40da884cfc | 12 | * ELECTRONICS CORPORATION NOR ANY OF ITS AFFILIATED COMPANIES SHALL BE LIABLE |
dkato | 0:ee40da884cfc | 13 | * FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR |
dkato | 0:ee40da884cfc | 14 | * ANY REASON RELATED TO THIS SOFTWARE, EVEN IF RENESAS OR ITS AFFILIATES HAVE |
dkato | 0:ee40da884cfc | 15 | * BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. |
dkato | 0:ee40da884cfc | 16 | * Renesas reserves the right, without notice, to make changes to this software |
dkato | 0:ee40da884cfc | 17 | * and to discontinue the availability of this software. By using this software, |
dkato | 0:ee40da884cfc | 18 | * you agree to the additional terms and conditions found by accessing the |
dkato | 0:ee40da884cfc | 19 | * following link: |
dkato | 0:ee40da884cfc | 20 | * http://www.renesas.com/disclaimer* |
dkato | 0:ee40da884cfc | 21 | * Copyright (C) 2015 Renesas Electronics Corporation. All rights reserved. |
dkato | 0:ee40da884cfc | 22 | *******************************************************************************/ |
dkato | 0:ee40da884cfc | 23 | |
dkato | 0:ee40da884cfc | 24 | #include "decode.h" |
dkato | 0:ee40da884cfc | 25 | #include "misratypes.h" |
dkato | 0:ee40da884cfc | 26 | #include "dec_flac.h" |
dkato | 0:ee40da884cfc | 27 | |
dkato | 0:ee40da884cfc | 28 | static FLAC__StreamDecoderReadStatus read_cb(const FLAC__StreamDecoder *decoder, |
dkato | 0:ee40da884cfc | 29 | FLAC__byte buffer[], size_t *bytes, void *client_data); |
dkato | 0:ee40da884cfc | 30 | static FLAC__StreamDecoderWriteStatus write_cb (const FLAC__StreamDecoder *decoder, |
dkato | 0:ee40da884cfc | 31 | const FLAC__Frame *frame, const FLAC__int32 *const buffer[], void *client_data); |
dkato | 0:ee40da884cfc | 32 | static void meta_cb(const FLAC__StreamDecoder *decoder, |
dkato | 0:ee40da884cfc | 33 | const FLAC__StreamMetadata *metadata, void *client_data); |
dkato | 0:ee40da884cfc | 34 | static void error_cb(const FLAC__StreamDecoder *decoder, |
dkato | 0:ee40da884cfc | 35 | FLAC__StreamDecoderErrorStatus status, void *client_data); |
dkato | 0:ee40da884cfc | 36 | static void init_ctrl_data(flac_ctrl_t * const p_ctrl); |
dkato | 0:ee40da884cfc | 37 | static bool check_file_spec(const flac_ctrl_t * const p_ctrl); |
dkato | 0:ee40da884cfc | 38 | static bool check_end_of_stream(const flac_ctrl_t * const p_flac_ctrl); |
dkato | 0:ee40da884cfc | 39 | |
dkato | 0:ee40da884cfc | 40 | bool flac_set_pcm_buf(flac_ctrl_t * const p_flac_ctrl, |
dkato | 0:ee40da884cfc | 41 | int32_t * const p_buf_addr, const uint32_t buf_num) |
dkato | 0:ee40da884cfc | 42 | { |
dkato | 0:ee40da884cfc | 43 | bool ret = false; |
dkato | 0:ee40da884cfc | 44 | if ((p_flac_ctrl != NULL) && (p_buf_addr != NULL) && (buf_num > 0u)) { |
dkato | 0:ee40da884cfc | 45 | p_flac_ctrl->p_pcm_buf = p_buf_addr; |
dkato | 0:ee40da884cfc | 46 | p_flac_ctrl->pcm_buf_num = buf_num; |
dkato | 0:ee40da884cfc | 47 | p_flac_ctrl->pcm_buf_used_cnt = 0u; |
dkato | 0:ee40da884cfc | 48 | ret = true; |
dkato | 0:ee40da884cfc | 49 | } |
dkato | 0:ee40da884cfc | 50 | return ret; |
dkato | 0:ee40da884cfc | 51 | } |
dkato | 0:ee40da884cfc | 52 | |
dkato | 0:ee40da884cfc | 53 | uint32_t flac_get_pcm_cnt(const flac_ctrl_t * const p_flac_ctrl) |
dkato | 0:ee40da884cfc | 54 | { |
dkato | 0:ee40da884cfc | 55 | uint32_t ret = 0u; |
dkato | 0:ee40da884cfc | 56 | if (p_flac_ctrl != NULL) { |
dkato | 0:ee40da884cfc | 57 | ret = p_flac_ctrl->pcm_buf_used_cnt; |
dkato | 0:ee40da884cfc | 58 | } |
dkato | 0:ee40da884cfc | 59 | return ret; |
dkato | 0:ee40da884cfc | 60 | } |
dkato | 0:ee40da884cfc | 61 | |
dkato | 0:ee40da884cfc | 62 | uint32_t flac_get_play_time(const flac_ctrl_t * const p_flac_ctrl) |
dkato | 0:ee40da884cfc | 63 | { |
dkato | 0:ee40da884cfc | 64 | uint32_t play_time = 0u; |
dkato | 0:ee40da884cfc | 65 | if (p_flac_ctrl != NULL) { |
dkato | 0:ee40da884cfc | 66 | if (p_flac_ctrl->sample_rate > 0u) { /* Prevents division by 0 */ |
dkato | 0:ee40da884cfc | 67 | play_time = (uint32_t)(p_flac_ctrl->decoded_sample / p_flac_ctrl->sample_rate); |
dkato | 0:ee40da884cfc | 68 | } |
dkato | 0:ee40da884cfc | 69 | } |
dkato | 0:ee40da884cfc | 70 | return play_time; |
dkato | 0:ee40da884cfc | 71 | } |
dkato | 0:ee40da884cfc | 72 | |
dkato | 0:ee40da884cfc | 73 | uint32_t flac_get_total_time(const flac_ctrl_t * const p_flac_ctrl) |
dkato | 0:ee40da884cfc | 74 | { |
dkato | 0:ee40da884cfc | 75 | uint32_t total_time = 0u; |
dkato | 0:ee40da884cfc | 76 | if (p_flac_ctrl != NULL) { |
dkato | 0:ee40da884cfc | 77 | if (p_flac_ctrl->sample_rate > 0u) { /* Prevents division by 0 */ |
dkato | 0:ee40da884cfc | 78 | total_time = (uint32_t)(p_flac_ctrl->total_sample / p_flac_ctrl->sample_rate); |
dkato | 0:ee40da884cfc | 79 | } |
dkato | 0:ee40da884cfc | 80 | } |
dkato | 0:ee40da884cfc | 81 | return total_time; |
dkato | 0:ee40da884cfc | 82 | } |
dkato | 0:ee40da884cfc | 83 | |
dkato | 0:ee40da884cfc | 84 | bool flac_open(FILE * const p_handle, flac_ctrl_t * const p_flac_ctrl) |
dkato | 0:ee40da884cfc | 85 | { |
dkato | 0:ee40da884cfc | 86 | bool ret = false; |
dkato | 0:ee40da884cfc | 87 | FLAC__bool result; |
dkato | 0:ee40da884cfc | 88 | FLAC__StreamDecoderInitStatus result_init; |
dkato | 0:ee40da884cfc | 89 | FLAC__StreamDecoder *p_dec; |
dkato | 0:ee40da884cfc | 90 | |
dkato | 0:ee40da884cfc | 91 | if ((p_handle != NULL) && (p_flac_ctrl != NULL)) { |
dkato | 0:ee40da884cfc | 92 | /* Initialises Internal memory */ |
dkato | 0:ee40da884cfc | 93 | init_ctrl_data(p_flac_ctrl); |
dkato | 0:ee40da884cfc | 94 | p_flac_ctrl->p_file_handle = p_handle; |
dkato | 0:ee40da884cfc | 95 | /* Creates the instance of flac decoder. */ |
dkato | 0:ee40da884cfc | 96 | p_dec = FLAC__stream_decoder_new(); |
dkato | 0:ee40da884cfc | 97 | if (p_dec != NULL) { |
dkato | 0:ee40da884cfc | 98 | /* Sets the MD5 check. */ |
dkato | 0:ee40da884cfc | 99 | (void) FLAC__stream_decoder_set_md5_checking(p_dec, true); |
dkato | 0:ee40da884cfc | 100 | /* Initialises the instance of flac decoder. */ |
dkato | 0:ee40da884cfc | 101 | result_init = FLAC__stream_decoder_init_stream(p_dec, &read_cb, NULL, NULL, |
dkato | 0:ee40da884cfc | 102 | NULL, NULL, &write_cb, &meta_cb, &error_cb, (void *)p_flac_ctrl); |
dkato | 0:ee40da884cfc | 103 | if (result_init == FLAC__STREAM_DECODER_INIT_STATUS_OK) { |
dkato | 0:ee40da884cfc | 104 | /* Decodes until end of metadata. */ |
dkato | 0:ee40da884cfc | 105 | result = FLAC__stream_decoder_process_until_end_of_metadata(p_dec); |
dkato | 0:ee40da884cfc | 106 | if (result == true) { |
dkato | 0:ee40da884cfc | 107 | if (check_file_spec(p_flac_ctrl) == true) { |
dkato | 0:ee40da884cfc | 108 | p_flac_ctrl->p_decoder = p_dec; |
dkato | 0:ee40da884cfc | 109 | ret = true; |
dkato | 0:ee40da884cfc | 110 | } |
dkato | 0:ee40da884cfc | 111 | } |
dkato | 0:ee40da884cfc | 112 | } |
dkato | 0:ee40da884cfc | 113 | if (ret != true) { |
dkato | 0:ee40da884cfc | 114 | FLAC__stream_decoder_delete(p_dec); |
dkato | 0:ee40da884cfc | 115 | } |
dkato | 0:ee40da884cfc | 116 | } |
dkato | 0:ee40da884cfc | 117 | } |
dkato | 0:ee40da884cfc | 118 | return ret; |
dkato | 0:ee40da884cfc | 119 | } |
dkato | 0:ee40da884cfc | 120 | |
dkato | 0:ee40da884cfc | 121 | bool flac_decode(const flac_ctrl_t * const p_flac_ctrl) |
dkato | 0:ee40da884cfc | 122 | { |
dkato | 0:ee40da884cfc | 123 | bool ret = false; |
dkato | 0:ee40da884cfc | 124 | bool eos; |
dkato | 0:ee40da884cfc | 125 | FLAC__bool result; |
dkato | 0:ee40da884cfc | 126 | uint32_t used_cnt; |
dkato | 0:ee40da884cfc | 127 | |
dkato | 0:ee40da884cfc | 128 | if (p_flac_ctrl != NULL) { |
dkato | 0:ee40da884cfc | 129 | eos = check_end_of_stream(p_flac_ctrl); |
dkato | 0:ee40da884cfc | 130 | if (eos != true) { |
dkato | 0:ee40da884cfc | 131 | /* Decoding position is not end of stream. */ |
dkato | 0:ee40da884cfc | 132 | used_cnt = p_flac_ctrl->pcm_buf_used_cnt; |
dkato | 0:ee40da884cfc | 133 | result = FLAC__stream_decoder_process_single (p_flac_ctrl->p_decoder); |
dkato | 0:ee40da884cfc | 134 | if (result == true) { |
dkato | 0:ee40da884cfc | 135 | /* Did a decoded data increase? */ |
dkato | 0:ee40da884cfc | 136 | if (p_flac_ctrl->pcm_buf_used_cnt > used_cnt) { |
dkato | 0:ee40da884cfc | 137 | /* FLAC decoder process succeeded. */ |
dkato | 0:ee40da884cfc | 138 | ret = true; |
dkato | 0:ee40da884cfc | 139 | } |
dkato | 0:ee40da884cfc | 140 | } |
dkato | 0:ee40da884cfc | 141 | } |
dkato | 0:ee40da884cfc | 142 | } |
dkato | 0:ee40da884cfc | 143 | return ret; |
dkato | 0:ee40da884cfc | 144 | } |
dkato | 0:ee40da884cfc | 145 | |
dkato | 0:ee40da884cfc | 146 | void flac_close(flac_ctrl_t * const p_flac_ctrl) |
dkato | 0:ee40da884cfc | 147 | { |
dkato | 0:ee40da884cfc | 148 | if (p_flac_ctrl != NULL) { |
dkato | 0:ee40da884cfc | 149 | FLAC__stream_decoder_delete(p_flac_ctrl->p_decoder); |
dkato | 0:ee40da884cfc | 150 | p_flac_ctrl->p_decoder = NULL; |
dkato | 0:ee40da884cfc | 151 | } |
dkato | 0:ee40da884cfc | 152 | } |
dkato | 0:ee40da884cfc | 153 | |
dkato | 0:ee40da884cfc | 154 | /** Read callback function of FLAC decoder library |
dkato | 0:ee40da884cfc | 155 | * |
dkato | 0:ee40da884cfc | 156 | * @param decoder Decoder instance. |
dkato | 0:ee40da884cfc | 157 | * @param buffer Pointer to the buffer to store the data of FLAC file. |
dkato | 0:ee40da884cfc | 158 | * @param bytes Pointer to the size of the buffer. |
dkato | 0:ee40da884cfc | 159 | * @param client_data Pointer to the control data of FLAC module. |
dkato | 0:ee40da884cfc | 160 | * |
dkato | 0:ee40da884cfc | 161 | * @returns |
dkato | 0:ee40da884cfc | 162 | * Results of process. Returns the following status. |
dkato | 0:ee40da884cfc | 163 | * FLAC__STREAM_DECODER_READ_STATUS_CONTINUE |
dkato | 0:ee40da884cfc | 164 | * FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM |
dkato | 0:ee40da884cfc | 165 | * FLAC__STREAM_DECODER_READ_STATUS_ABORT |
dkato | 0:ee40da884cfc | 166 | */ |
dkato | 0:ee40da884cfc | 167 | static FLAC__StreamDecoderReadStatus read_cb(const FLAC__StreamDecoder *decoder, |
dkato | 0:ee40da884cfc | 168 | FLAC__byte buffer[], size_t *bytes, void *client_data) |
dkato | 0:ee40da884cfc | 169 | { |
dkato | 0:ee40da884cfc | 170 | FLAC__StreamDecoderReadStatus ret = FLAC__STREAM_DECODER_READ_STATUS_ABORT; |
dkato | 0:ee40da884cfc | 171 | flac_ctrl_t * const p_ctrl = (flac_ctrl_t*)client_data; |
dkato | 0:ee40da884cfc | 172 | size_t read_size; |
dkato | 0:ee40da884cfc | 173 | |
dkato | 0:ee40da884cfc | 174 | UNUSED_ARG(decoder); |
dkato | 0:ee40da884cfc | 175 | if ((buffer != NULL) && (bytes != NULL) && (p_ctrl != NULL)) { |
dkato | 0:ee40da884cfc | 176 | if (*bytes > 0u) { |
dkato | 0:ee40da884cfc | 177 | read_size = fread(&buffer[0], sizeof(FLAC__byte), *bytes, p_ctrl->p_file_handle); |
dkato | 0:ee40da884cfc | 178 | if (read_size > 0u) { |
dkato | 0:ee40da884cfc | 179 | ret = FLAC__STREAM_DECODER_READ_STATUS_CONTINUE; |
dkato | 0:ee40da884cfc | 180 | *bytes = read_size; |
dkato | 0:ee40da884cfc | 181 | } else { |
dkato | 0:ee40da884cfc | 182 | ret = FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM; |
dkato | 0:ee40da884cfc | 183 | *bytes = 0; |
dkato | 0:ee40da884cfc | 184 | } |
dkato | 0:ee40da884cfc | 185 | } |
dkato | 0:ee40da884cfc | 186 | } |
dkato | 0:ee40da884cfc | 187 | return ret; |
dkato | 0:ee40da884cfc | 188 | } |
dkato | 0:ee40da884cfc | 189 | |
dkato | 0:ee40da884cfc | 190 | /** Write callback function of FLAC decoder library |
dkato | 0:ee40da884cfc | 191 | * |
dkato | 0:ee40da884cfc | 192 | * @param decoder Decoder instance. |
dkato | 0:ee40da884cfc | 193 | * @param frame The description of the decoded frame. |
dkato | 0:ee40da884cfc | 194 | * @param buffer Pointer to the decoded data. |
dkato | 0:ee40da884cfc | 195 | * @param client_data Pointer to the control data of FLAC module. |
dkato | 0:ee40da884cfc | 196 | * |
dkato | 0:ee40da884cfc | 197 | * @returns |
dkato | 0:ee40da884cfc | 198 | * Results of process. Returns the following status. |
dkato | 0:ee40da884cfc | 199 | * FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE |
dkato | 0:ee40da884cfc | 200 | * FLAC__STREAM_DECODER_WRITE_STATUS_ABORT |
dkato | 0:ee40da884cfc | 201 | */ |
dkato | 0:ee40da884cfc | 202 | static FLAC__StreamDecoderWriteStatus write_cb (const FLAC__StreamDecoder *decoder, |
dkato | 0:ee40da884cfc | 203 | const FLAC__Frame *frame, const FLAC__int32 *const buffer[], void *client_data) |
dkato | 0:ee40da884cfc | 204 | { |
dkato | 0:ee40da884cfc | 205 | FLAC__StreamDecoderWriteStatus ret = FLAC__STREAM_DECODER_WRITE_STATUS_ABORT; |
dkato | 0:ee40da884cfc | 206 | const FLAC__int32 *p_ch0; |
dkato | 0:ee40da884cfc | 207 | const FLAC__int32 *p_ch1; |
dkato | 0:ee40da884cfc | 208 | flac_ctrl_t *const p_ctrl = (flac_ctrl_t*)client_data; |
dkato | 0:ee40da884cfc | 209 | uint32_t bit_shift_num; |
dkato | 0:ee40da884cfc | 210 | uint32_t i; |
dkato | 0:ee40da884cfc | 211 | |
dkato | 0:ee40da884cfc | 212 | UNUSED_ARG(decoder); |
dkato | 0:ee40da884cfc | 213 | if ((frame != NULL) && (buffer != NULL) && (p_ctrl != NULL)) { |
dkato | 0:ee40da884cfc | 214 | if (frame->header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER) { |
dkato | 0:ee40da884cfc | 215 | p_ctrl->decoded_sample = frame->header.number.sample_number + frame->header.blocksize; |
dkato | 0:ee40da884cfc | 216 | } else { |
dkato | 0:ee40da884cfc | 217 | p_ctrl->decoded_sample += frame->header.blocksize; |
dkato | 0:ee40da884cfc | 218 | } |
dkato | 0:ee40da884cfc | 219 | if (p_ctrl->p_pcm_buf == NULL) { |
dkato | 0:ee40da884cfc | 220 | /* Error */ |
dkato | 0:ee40da884cfc | 221 | } else if (frame->header.blocksize > DEC_MAX_BLOCK_SIZE) { |
dkato | 0:ee40da884cfc | 222 | /* Error : Block size is illegal specification */ |
dkato | 0:ee40da884cfc | 223 | } else { |
dkato | 0:ee40da884cfc | 224 | bit_shift_num = (DEC_OUTPUT_BITS_PER_SAMPLE + DEC_OUTPUT_PADDING_BITS)- p_ctrl->bits_per_sample; |
dkato | 0:ee40da884cfc | 225 | if (p_ctrl->channel_num == DEC_MAX_CHANNEL_NUM) { |
dkato | 0:ee40da884cfc | 226 | /* stereo */ |
dkato | 0:ee40da884cfc | 227 | p_ch0 = buffer[0]; |
dkato | 0:ee40da884cfc | 228 | p_ch1 = buffer[1]; |
dkato | 0:ee40da884cfc | 229 | } else { |
dkato | 0:ee40da884cfc | 230 | /* mono */ |
dkato | 0:ee40da884cfc | 231 | p_ch0 = buffer[0]; |
dkato | 0:ee40da884cfc | 232 | p_ch1 = buffer[0]; |
dkato | 0:ee40da884cfc | 233 | } |
dkato | 0:ee40da884cfc | 234 | if ((p_ctrl->pcm_buf_num - p_ctrl->pcm_buf_used_cnt) >= (frame->header.blocksize * DEC_MAX_CHANNEL_NUM)) { |
dkato | 0:ee40da884cfc | 235 | for (i = 0; i < frame->header.blocksize; i++) { |
dkato | 0:ee40da884cfc | 236 | /* ch 0 */ |
dkato | 0:ee40da884cfc | 237 | p_ctrl->p_pcm_buf[p_ctrl->pcm_buf_used_cnt] = (int32_t)((uint32_t)p_ch0[i] << bit_shift_num); |
dkato | 0:ee40da884cfc | 238 | p_ctrl->pcm_buf_used_cnt++; |
dkato | 0:ee40da884cfc | 239 | /* ch 1 */ |
dkato | 0:ee40da884cfc | 240 | p_ctrl->p_pcm_buf[p_ctrl->pcm_buf_used_cnt] = (int32_t)((uint32_t)p_ch1[i] << bit_shift_num); |
dkato | 0:ee40da884cfc | 241 | p_ctrl->pcm_buf_used_cnt++; |
dkato | 0:ee40da884cfc | 242 | } |
dkato | 0:ee40da884cfc | 243 | ret = FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE; |
dkato | 0:ee40da884cfc | 244 | } |
dkato | 0:ee40da884cfc | 245 | } |
dkato | 0:ee40da884cfc | 246 | } |
dkato | 0:ee40da884cfc | 247 | return ret; |
dkato | 0:ee40da884cfc | 248 | } |
dkato | 0:ee40da884cfc | 249 | |
dkato | 0:ee40da884cfc | 250 | /** Metadata callback function of FLAC decoder library |
dkato | 0:ee40da884cfc | 251 | * |
dkato | 0:ee40da884cfc | 252 | * @param decoder Decoder instance. |
dkato | 0:ee40da884cfc | 253 | * @param metadata Block of the decoded metadata. |
dkato | 0:ee40da884cfc | 254 | * @param client_data Pointer to the control data of FLAC module. |
dkato | 0:ee40da884cfc | 255 | */ |
dkato | 0:ee40da884cfc | 256 | static void meta_cb(const FLAC__StreamDecoder *decoder, |
dkato | 0:ee40da884cfc | 257 | const FLAC__StreamMetadata *metadata, void *client_data) |
dkato | 0:ee40da884cfc | 258 | { |
dkato | 0:ee40da884cfc | 259 | flac_ctrl_t *const p_ctrl = (flac_ctrl_t*)client_data; |
dkato | 0:ee40da884cfc | 260 | |
dkato | 0:ee40da884cfc | 261 | UNUSED_ARG(decoder); |
dkato | 0:ee40da884cfc | 262 | if ((metadata != NULL) && (p_ctrl != NULL)) { |
dkato | 0:ee40da884cfc | 263 | if (metadata->type == FLAC__METADATA_TYPE_STREAMINFO) { |
dkato | 0:ee40da884cfc | 264 | p_ctrl->sample_rate = metadata->data.stream_info.sample_rate; |
dkato | 0:ee40da884cfc | 265 | p_ctrl->channel_num = metadata->data.stream_info.channels; |
dkato | 0:ee40da884cfc | 266 | p_ctrl->bits_per_sample = metadata->data.stream_info.bits_per_sample; |
dkato | 0:ee40da884cfc | 267 | p_ctrl->total_sample = metadata->data.stream_info.total_samples; |
dkato | 0:ee40da884cfc | 268 | } |
dkato | 0:ee40da884cfc | 269 | } |
dkato | 0:ee40da884cfc | 270 | } |
dkato | 0:ee40da884cfc | 271 | |
dkato | 0:ee40da884cfc | 272 | /** Error callback function of FLAC decoder library |
dkato | 0:ee40da884cfc | 273 | * |
dkato | 0:ee40da884cfc | 274 | * @param decoder Decoder instance. |
dkato | 0:ee40da884cfc | 275 | * @param client_data Pointer to the control data of FLAC module. |
dkato | 0:ee40da884cfc | 276 | */ |
dkato | 0:ee40da884cfc | 277 | static void error_cb(const FLAC__StreamDecoder *decoder, |
dkato | 0:ee40da884cfc | 278 | FLAC__StreamDecoderErrorStatus status, void *client_data) |
dkato | 0:ee40da884cfc | 279 | { |
dkato | 0:ee40da884cfc | 280 | /* DO NOTHING */ |
dkato | 0:ee40da884cfc | 281 | UNUSED_ARG(decoder); |
dkato | 0:ee40da884cfc | 282 | UNUSED_ARG(status); |
dkato | 0:ee40da884cfc | 283 | UNUSED_ARG(client_data); |
dkato | 0:ee40da884cfc | 284 | } |
dkato | 0:ee40da884cfc | 285 | |
dkato | 0:ee40da884cfc | 286 | /** Initialises the control data of FLAC module |
dkato | 0:ee40da884cfc | 287 | * |
dkato | 0:ee40da884cfc | 288 | * @param p_ctrl Pointer to the control data of FLAC module. |
dkato | 0:ee40da884cfc | 289 | */ |
dkato | 0:ee40da884cfc | 290 | static void init_ctrl_data(flac_ctrl_t * const p_ctrl) |
dkato | 0:ee40da884cfc | 291 | { |
dkato | 0:ee40da884cfc | 292 | if (p_ctrl != NULL) { |
dkato | 0:ee40da884cfc | 293 | p_ctrl->p_decoder = NULL; /* Handle of flac decoder */ |
dkato | 0:ee40da884cfc | 294 | p_ctrl->p_file_handle = NULL; /* Handle of flac file */ |
dkato | 0:ee40da884cfc | 295 | p_ctrl->decoded_sample = 0uLL; /* Number of a decoded sample */ |
dkato | 0:ee40da884cfc | 296 | p_ctrl->total_sample = 0uLL; /* Total number of sample */ |
dkato | 0:ee40da884cfc | 297 | p_ctrl->sample_rate = 0u; /* Sample rate in Hz */ |
dkato | 0:ee40da884cfc | 298 | p_ctrl->channel_num = 0u; /* Number of channels */ |
dkato | 0:ee40da884cfc | 299 | p_ctrl->bits_per_sample = 0u; /* bit per sample */ |
dkato | 0:ee40da884cfc | 300 | p_ctrl->p_pcm_buf = NULL; /* Pointer of PCM buffer */ |
dkato | 0:ee40da884cfc | 301 | p_ctrl->pcm_buf_num = 0u; /* Number of elements in PCM buffer */ |
dkato | 0:ee40da884cfc | 302 | p_ctrl->pcm_buf_used_cnt = 0u; /* Counter of used elements in PCM buffer */ |
dkato | 0:ee40da884cfc | 303 | } |
dkato | 0:ee40da884cfc | 304 | } |
dkato | 0:ee40da884cfc | 305 | |
dkato | 0:ee40da884cfc | 306 | /** Checks the playable file of the playback |
dkato | 0:ee40da884cfc | 307 | * |
dkato | 0:ee40da884cfc | 308 | * @param client_data Pointer to the control data of FLAC module. |
dkato | 0:ee40da884cfc | 309 | */ |
dkato | 0:ee40da884cfc | 310 | static bool check_file_spec(const flac_ctrl_t * const p_ctrl) |
dkato | 0:ee40da884cfc | 311 | { |
dkato | 0:ee40da884cfc | 312 | bool ret = false; |
dkato | 0:ee40da884cfc | 313 | |
dkato | 0:ee40da884cfc | 314 | if (p_ctrl == NULL) { |
dkato | 0:ee40da884cfc | 315 | /* Error : NULL pointer */ |
dkato | 0:ee40da884cfc | 316 | } else if ((p_ctrl->channel_num <= 0u) || |
dkato | 0:ee40da884cfc | 317 | (p_ctrl->channel_num > DEC_MAX_CHANNEL_NUM)) { |
dkato | 0:ee40da884cfc | 318 | /* Error : Channel number is illegal specification */ |
dkato | 0:ee40da884cfc | 319 | } else if ((p_ctrl->bits_per_sample != DEC_16BITS_PER_SAMPLE) && |
dkato | 0:ee40da884cfc | 320 | (p_ctrl->bits_per_sample != DEC_24BITS_PER_SAMPLE)) { |
dkato | 0:ee40da884cfc | 321 | /* Error : Bit per sample is illegal specification */ |
dkato | 0:ee40da884cfc | 322 | } else if ((p_ctrl->sample_rate < DEC_INPUT_MIN_SAMPLE_RATE) || |
dkato | 0:ee40da884cfc | 323 | (p_ctrl->sample_rate > DEC_INPUT_MAX_SAMPLE_RATE)) { |
dkato | 0:ee40da884cfc | 324 | /* Error : Sample rate is illegal specification */ |
dkato | 0:ee40da884cfc | 325 | } else { |
dkato | 0:ee40da884cfc | 326 | /* OK */ |
dkato | 0:ee40da884cfc | 327 | ret = true; |
dkato | 0:ee40da884cfc | 328 | } |
dkato | 0:ee40da884cfc | 329 | return ret; |
dkato | 0:ee40da884cfc | 330 | } |
dkato | 0:ee40da884cfc | 331 | |
dkato | 0:ee40da884cfc | 332 | /** Checks the state of the FLAC decoder |
dkato | 0:ee40da884cfc | 333 | * |
dkato | 0:ee40da884cfc | 334 | * @param p_flac_ctrl Pointer to the control data of FLAC module. |
dkato | 0:ee40da884cfc | 335 | * |
dkato | 0:ee40da884cfc | 336 | * @returns |
dkato | 0:ee40da884cfc | 337 | * The state of FLAC decoder. true is end of stream. false is other state. |
dkato | 0:ee40da884cfc | 338 | */ |
dkato | 0:ee40da884cfc | 339 | static bool check_end_of_stream(const flac_ctrl_t * const p_flac_ctrl) |
dkato | 0:ee40da884cfc | 340 | { |
dkato | 0:ee40da884cfc | 341 | bool ret = false; |
dkato | 0:ee40da884cfc | 342 | FLAC__StreamDecoderState state; |
dkato | 0:ee40da884cfc | 343 | |
dkato | 0:ee40da884cfc | 344 | if (p_flac_ctrl != NULL) { |
dkato | 0:ee40da884cfc | 345 | state = FLAC__stream_decoder_get_state(p_flac_ctrl->p_decoder); |
dkato | 0:ee40da884cfc | 346 | if (state == FLAC__STREAM_DECODER_END_OF_STREAM) { |
dkato | 0:ee40da884cfc | 347 | ret = true; |
dkato | 0:ee40da884cfc | 348 | } |
dkato | 0:ee40da884cfc | 349 | } |
dkato | 0:ee40da884cfc | 350 | return ret; |
dkato | 0:ee40da884cfc | 351 | } |