/* * This file is part of the Micro Python project, http://micropython.org/ * * The MIT License (MIT) * * Copyright (c) 2018 Scott Shawcroft for Adafruit Industries * Copyright (c) 2019 Jeff Epler for Adafruit Industries * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include #include "shared/runtime/context_manager_helpers.h" #include "py/objproperty.h" #include "py/runtime.h" #include "shared-bindings/audiomp3/MP3Decoder.h" #include "shared-bindings/util.h" //| class MP3Decoder: //| """Load a mp3 file for audio playback //| //| .. note:: //| //| ``MP3Decoder`` uses a lot of contiguous memory, so care should be given to //| optimizing memory usage. More information and recommendations can be found here: //| https://learn.adafruit.com/Memory-saving-tips-for-CircuitPython/reducing-memory-fragmentation //| """ //| //| def __init__(self, file: Union[str, typing.BinaryIO], buffer: WriteableBuffer) -> None: //| """Load a .mp3 file for playback with `audioio.AudioOut` or `audiobusio.I2SOut`. //| //| :param Union[str, typing.BinaryIO] file: The name of a mp3 file (preferred) or an already opened mp3 file //| :param ~circuitpython_typing.WriteableBuffer buffer: Optional pre-allocated buffer, that will be split in half and used for double-buffering of the data. If not provided, two buffers are allocated internally. The specific buffer size required depends on the mp3 file. //| //| Playback of mp3 audio is CPU intensive, and the //| exact limit depends on many factors such as the particular //| microcontroller, SD card or flash performance, and other //| code in use such as displayio. If playback is garbled, //| skips, or plays as static, first try using a "simpler" mp3: //| //| * Use constant bit rate (CBR) not VBR or ABR (variable or average bit rate) when encoding your mp3 file //| * Use a lower sample rate (e.g., 11.025kHz instead of 48kHz) //| * Use a lower bit rate (e.g., 32kbit/s instead of 256kbit/s) //| //| Reduce activity taking place at the same time as //| mp3 playback. For instance, only update small portions of a //| displayio screen if audio is playing. Disable auto-refresh //| and explicitly call refresh. //| //| Playing a mp3 file from flash:: //| //| import board //| import audiomp3 //| import audioio //| import digitalio //| //| # Required for CircuitPlayground Express //| speaker_enable = digitalio.DigitalInOut(board.SPEAKER_ENABLE) //| speaker_enable.switch_to_output(value=True) //| //| mp3 = audiomp3.MP3Decoder("cplay-16bit-16khz-64kbps.mp3") //| a = audioio.AudioOut(board.A0) //| //| print("playing") //| a.play(mp3) //| while a.playing: //| pass //| print("stopped") //| """ //| ... STATIC mp_obj_t audiomp3_mp3file_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) { mp_arg_check_num(n_args, n_kw, 1, 2, false); mp_obj_t arg = args[0]; if (mp_obj_is_str(arg)) { arg = mp_call_function_2(MP_OBJ_FROM_PTR(&mp_builtin_open_obj), arg, MP_ROM_QSTR(MP_QSTR_rb)); } audiomp3_mp3file_obj_t *self = mp_obj_malloc(audiomp3_mp3file_obj_t, &audiomp3_mp3file_type); if (!mp_obj_is_type(arg, &mp_type_fileio)) { mp_raise_TypeError(MP_ERROR_TEXT("file must be a file opened in byte mode")); } uint8_t *buffer = NULL; size_t buffer_size = 0; if (n_args >= 2) { mp_buffer_info_t bufinfo; mp_get_buffer_raise(args[1], &bufinfo, MP_BUFFER_WRITE); buffer = bufinfo.buf; buffer_size = bufinfo.len; } common_hal_audiomp3_mp3file_construct(self, MP_OBJ_TO_PTR(arg), buffer, buffer_size); return MP_OBJ_FROM_PTR(self); } //| def deinit(self) -> None: //| """Deinitialises the MP3 and releases all memory resources for reuse.""" //| ... STATIC mp_obj_t audiomp3_mp3file_deinit(mp_obj_t self_in) { audiomp3_mp3file_obj_t *self = MP_OBJ_TO_PTR(self_in); common_hal_audiomp3_mp3file_deinit(self); return mp_const_none; } STATIC MP_DEFINE_CONST_FUN_OBJ_1(audiomp3_mp3file_deinit_obj, audiomp3_mp3file_deinit); STATIC void check_for_deinit(audiomp3_mp3file_obj_t *self) { if (common_hal_audiomp3_mp3file_deinited(self)) { raise_deinited_error(); } } //| def __enter__(self) -> MP3Decoder: //| """No-op used by Context Managers.""" //| ... // Provided by context manager helper. //| def __exit__(self) -> None: //| """Automatically deinitializes the hardware when exiting a context. See //| :ref:`lifetime-and-contextmanagers` for more info.""" //| ... STATIC mp_obj_t audiomp3_mp3file_obj___exit__(size_t n_args, const mp_obj_t *args) { (void)n_args; common_hal_audiomp3_mp3file_deinit(args[0]); return mp_const_none; } STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(audiomp3_mp3file___exit___obj, 4, 4, audiomp3_mp3file_obj___exit__); //| file: typing.BinaryIO //| """File to play back.""" STATIC mp_obj_t audiomp3_mp3file_obj_get_file(mp_obj_t self_in) { audiomp3_mp3file_obj_t *self = MP_OBJ_TO_PTR(self_in); check_for_deinit(self); return self->file; } MP_DEFINE_CONST_FUN_OBJ_1(audiomp3_mp3file_get_file_obj, audiomp3_mp3file_obj_get_file); STATIC mp_obj_t audiomp3_mp3file_obj_set_file(mp_obj_t self_in, mp_obj_t file) { audiomp3_mp3file_obj_t *self = MP_OBJ_TO_PTR(self_in); check_for_deinit(self); if (!mp_obj_is_type(file, &mp_type_fileio)) { mp_raise_TypeError(MP_ERROR_TEXT("file must be a file opened in byte mode")); } common_hal_audiomp3_mp3file_set_file(self, file); return mp_const_none; } MP_DEFINE_CONST_FUN_OBJ_2(audiomp3_mp3file_set_file_obj, audiomp3_mp3file_obj_set_file); //| def open(self, filepath: str) -> None: //| """Takes in the name of a mp3 file, opens it, and replaces the old playback file.""" //| ... STATIC mp_obj_t audiomp3_mp3file_obj_open(mp_obj_t self_in, mp_obj_t path) { audiomp3_mp3file_obj_t *self = MP_OBJ_TO_PTR(self_in); check_for_deinit(self); mp_obj_t file = mp_call_function_2(MP_OBJ_FROM_PTR(&mp_builtin_open_obj), path, MP_ROM_QSTR(MP_QSTR_rb)); common_hal_audiomp3_mp3file_set_file(self, file); return mp_const_none; } MP_DEFINE_CONST_FUN_OBJ_2(audiomp3_mp3file_open_obj, audiomp3_mp3file_obj_open); MP_PROPERTY_GETSET(audiomp3_mp3file_file_obj, (mp_obj_t)&audiomp3_mp3file_get_file_obj, (mp_obj_t)&audiomp3_mp3file_set_file_obj); //| sample_rate: int //| """32 bit value that dictates how quickly samples are loaded into the DAC //| in Hertz (cycles per second). When the sample is looped, this can change //| the pitch output without changing the underlying sample.""" STATIC mp_obj_t audiomp3_mp3file_obj_get_sample_rate(mp_obj_t self_in) { audiomp3_mp3file_obj_t *self = MP_OBJ_TO_PTR(self_in); check_for_deinit(self); return MP_OBJ_NEW_SMALL_INT(common_hal_audiomp3_mp3file_get_sample_rate(self)); } MP_DEFINE_CONST_FUN_OBJ_1(audiomp3_mp3file_get_sample_rate_obj, audiomp3_mp3file_obj_get_sample_rate); STATIC mp_obj_t audiomp3_mp3file_obj_set_sample_rate(mp_obj_t self_in, mp_obj_t sample_rate) { audiomp3_mp3file_obj_t *self = MP_OBJ_TO_PTR(self_in); check_for_deinit(self); common_hal_audiomp3_mp3file_set_sample_rate(self, mp_obj_get_int(sample_rate)); return mp_const_none; } MP_DEFINE_CONST_FUN_OBJ_2(audiomp3_mp3file_set_sample_rate_obj, audiomp3_mp3file_obj_set_sample_rate); MP_PROPERTY_GETSET(audiomp3_mp3file_sample_rate_obj, (mp_obj_t)&audiomp3_mp3file_get_sample_rate_obj, (mp_obj_t)&audiomp3_mp3file_set_sample_rate_obj); //| bits_per_sample: int //| """Bits per sample. (read only)""" STATIC mp_obj_t audiomp3_mp3file_obj_get_bits_per_sample(mp_obj_t self_in) { audiomp3_mp3file_obj_t *self = MP_OBJ_TO_PTR(self_in); check_for_deinit(self); return MP_OBJ_NEW_SMALL_INT(common_hal_audiomp3_mp3file_get_bits_per_sample(self)); } MP_DEFINE_CONST_FUN_OBJ_1(audiomp3_mp3file_get_bits_per_sample_obj, audiomp3_mp3file_obj_get_bits_per_sample); MP_PROPERTY_GETTER(audiomp3_mp3file_bits_per_sample_obj, (mp_obj_t)&audiomp3_mp3file_get_bits_per_sample_obj); //| channel_count: int //| """Number of audio channels. (read only)""" STATIC mp_obj_t audiomp3_mp3file_obj_get_channel_count(mp_obj_t self_in) { audiomp3_mp3file_obj_t *self = MP_OBJ_TO_PTR(self_in); check_for_deinit(self); return MP_OBJ_NEW_SMALL_INT(common_hal_audiomp3_mp3file_get_channel_count(self)); } MP_DEFINE_CONST_FUN_OBJ_1(audiomp3_mp3file_get_channel_count_obj, audiomp3_mp3file_obj_get_channel_count); MP_PROPERTY_GETTER(audiomp3_mp3file_channel_count_obj, (mp_obj_t)&audiomp3_mp3file_get_channel_count_obj); //| rms_level: float //| """The RMS audio level of a recently played moment of audio. (read only)""" STATIC mp_obj_t audiomp3_mp3file_obj_get_rms_level(mp_obj_t self_in) { audiomp3_mp3file_obj_t *self = MP_OBJ_TO_PTR(self_in); check_for_deinit(self); return mp_obj_new_float(common_hal_audiomp3_mp3file_get_rms_level(self)); } MP_DEFINE_CONST_FUN_OBJ_1(audiomp3_mp3file_get_rms_level_obj, audiomp3_mp3file_obj_get_rms_level); MP_PROPERTY_GETTER(audiomp3_mp3file_rms_level_obj, (mp_obj_t)&audiomp3_mp3file_get_rms_level_obj); //| samples_decoded: int //| """The number of audio samples decoded from the current file. (read only)""" //| STATIC mp_obj_t audiomp3_mp3file_obj_get_samples_decoded(mp_obj_t self_in) { audiomp3_mp3file_obj_t *self = MP_OBJ_TO_PTR(self_in); check_for_deinit(self); return MP_OBJ_NEW_SMALL_INT(common_hal_audiomp3_mp3file_get_samples_decoded(self)); } MP_DEFINE_CONST_FUN_OBJ_1(audiomp3_mp3file_get_samples_decoded_obj, audiomp3_mp3file_obj_get_samples_decoded); MP_PROPERTY_GETTER(audiomp3_mp3file_samples_decoded_obj, (mp_obj_t)&audiomp3_mp3file_get_samples_decoded_obj); STATIC const mp_rom_map_elem_t audiomp3_mp3file_locals_dict_table[] = { // Methods { MP_ROM_QSTR(MP_QSTR_open), MP_ROM_PTR(&audiomp3_mp3file_open_obj) }, { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&audiomp3_mp3file_deinit_obj) }, { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) }, { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&audiomp3_mp3file___exit___obj) }, // Properties { MP_ROM_QSTR(MP_QSTR_file), MP_ROM_PTR(&audiomp3_mp3file_file_obj) }, { MP_ROM_QSTR(MP_QSTR_sample_rate), MP_ROM_PTR(&audiomp3_mp3file_sample_rate_obj) }, { MP_ROM_QSTR(MP_QSTR_bits_per_sample), MP_ROM_PTR(&audiomp3_mp3file_bits_per_sample_obj) }, { MP_ROM_QSTR(MP_QSTR_channel_count), MP_ROM_PTR(&audiomp3_mp3file_channel_count_obj) }, { MP_ROM_QSTR(MP_QSTR_rms_level), MP_ROM_PTR(&audiomp3_mp3file_rms_level_obj) }, { MP_ROM_QSTR(MP_QSTR_samples_decoded), MP_ROM_PTR(&audiomp3_mp3file_samples_decoded_obj) }, }; STATIC MP_DEFINE_CONST_DICT(audiomp3_mp3file_locals_dict, audiomp3_mp3file_locals_dict_table); STATIC const audiosample_p_t audiomp3_mp3file_proto = { MP_PROTO_IMPLEMENT(MP_QSTR_protocol_audiosample) .sample_rate = (audiosample_sample_rate_fun)common_hal_audiomp3_mp3file_get_sample_rate, .bits_per_sample = (audiosample_bits_per_sample_fun)common_hal_audiomp3_mp3file_get_bits_per_sample, .channel_count = (audiosample_channel_count_fun)common_hal_audiomp3_mp3file_get_channel_count, .reset_buffer = (audiosample_reset_buffer_fun)audiomp3_mp3file_reset_buffer, .get_buffer = (audiosample_get_buffer_fun)audiomp3_mp3file_get_buffer, .get_buffer_structure = (audiosample_get_buffer_structure_fun)audiomp3_mp3file_get_buffer_structure, }; MP_DEFINE_CONST_OBJ_TYPE( audiomp3_mp3file_type, MP_QSTR_MP3Decoder, MP_TYPE_FLAG_HAS_SPECIAL_ACCESSORS, make_new, audiomp3_mp3file_make_new, locals_dict, &audiomp3_mp3file_locals_dict, protocol, &audiomp3_mp3file_proto );