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Diffstat (limited to 'shared-module/audioio/Mixer.c')
| -rw-r--r-- | shared-module/audioio/Mixer.c | 341 |
1 files changed, 0 insertions, 341 deletions
diff --git a/shared-module/audioio/Mixer.c b/shared-module/audioio/Mixer.c deleted file mode 100644 index 8020a621e..000000000 --- a/shared-module/audioio/Mixer.c +++ /dev/null @@ -1,341 +0,0 @@ -/* - * This file is part of the Micro Python project, http://micropython.org/ - * - * The MIT License (MIT) - * - * Copyright (c) 2018 Scott Shawcroft 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 "shared-bindings/audioio/Mixer.h" - -#include <stdint.h> - -#include "py/runtime.h" -#include "shared-module/audioio/__init__.h" -#include "shared-module/audioio/RawSample.h" - -void common_hal_audioio_mixer_construct(audioio_mixer_obj_t* self, - uint8_t voice_count, - uint32_t buffer_size, - uint8_t bits_per_sample, - bool samples_signed, - uint8_t channel_count, - uint32_t sample_rate) { - self->len = buffer_size / 2 / sizeof(uint32_t) * sizeof(uint32_t); - - self->first_buffer = m_malloc(self->len, false); - if (self->first_buffer == NULL) { - common_hal_audioio_mixer_deinit(self); - mp_raise_msg(&mp_type_MemoryError, translate("Couldn't allocate first buffer")); - } - - self->second_buffer = m_malloc(self->len, false); - if (self->second_buffer == NULL) { - common_hal_audioio_mixer_deinit(self); - mp_raise_msg(&mp_type_MemoryError, translate("Couldn't allocate second buffer")); - } - - self->bits_per_sample = bits_per_sample; - self->samples_signed = samples_signed; - self->channel_count = channel_count; - self->sample_rate = sample_rate; - self->voice_count = voice_count; - - for (uint8_t i = 0; i < self->voice_count; i++) { - self->voice[i].sample = NULL; - } -} - -void common_hal_audioio_mixer_deinit(audioio_mixer_obj_t* self) { - self->first_buffer = NULL; - self->second_buffer = NULL; -} - -bool common_hal_audioio_mixer_deinited(audioio_mixer_obj_t* self) { - return self->first_buffer == NULL; -} - -uint32_t common_hal_audioio_mixer_get_sample_rate(audioio_mixer_obj_t* self) { - return self->sample_rate; -} - -void common_hal_audioio_mixer_play(audioio_mixer_obj_t* self, mp_obj_t sample, uint8_t v, bool loop) { - if (v >= self->voice_count) { - mp_raise_ValueError(translate("Voice index too high")); - } - if (audiosample_sample_rate(sample) != self->sample_rate) { - mp_raise_ValueError(translate("The sample's sample rate does not match the mixer's")); - } - if (audiosample_channel_count(sample) != self->channel_count) { - mp_raise_ValueError(translate("The sample's channel count does not match the mixer's")); - } - if (audiosample_bits_per_sample(sample) != self->bits_per_sample) { - mp_raise_ValueError(translate("The sample's bits_per_sample does not match the mixer's")); - } - bool single_buffer; - bool samples_signed; - uint32_t max_buffer_length; - uint8_t spacing; - audiosample_get_buffer_structure(sample, false, &single_buffer, &samples_signed, - &max_buffer_length, &spacing); - if (samples_signed != self->samples_signed) { - mp_raise_ValueError(translate("The sample's signedness does not match the mixer's")); - } - audioio_mixer_voice_t* voice = &self->voice[v]; - voice->sample = sample; - voice->loop = loop; - - audiosample_reset_buffer(sample, false, 0); - audioio_get_buffer_result_t result = audiosample_get_buffer(sample, false, 0, (uint8_t**) &voice->remaining_buffer, &voice->buffer_length); - // Track length in terms of words. - voice->buffer_length /= sizeof(uint32_t); - voice->more_data = result == GET_BUFFER_MORE_DATA; -} - -void common_hal_audioio_mixer_stop_voice(audioio_mixer_obj_t* self, uint8_t voice) { - self->voice[voice].sample = NULL; -} - -bool common_hal_audioio_mixer_get_playing(audioio_mixer_obj_t* self) { - for (int32_t v = 0; v < self->voice_count; v++) { - if (self->voice[v].sample != NULL) { - return true; - } - } - return false; -} - -void audioio_mixer_reset_buffer(audioio_mixer_obj_t* self, - bool single_channel, - uint8_t channel) { - for (int32_t i = 0; i < self->voice_count; i++) { - self->voice[i].sample = NULL; - } -} - -uint32_t add8signed(uint32_t a, uint32_t b) { - #if (defined (__ARM_FEATURE_DSP) && (__ARM_FEATURE_DSP == 1)) - return __QADD8(a, b); - #else - uint32_t result = 0; - for (int8_t i = 0; i < 4; i++) { - int8_t ai = a >> (sizeof(int8_t) * 8 * i); - int8_t bi = b >> (sizeof(int8_t) * 8 * i); - int32_t intermediate = (int32_t) ai + bi; - if (intermediate > CHAR_MAX) { - intermediate = CHAR_MAX; - } else if (intermediate < CHAR_MIN) { - //intermediate = CHAR_MIN; - } - result |= (((uint32_t) intermediate) & 0xff) << (sizeof(int8_t) * 8 * i); - } - return result; - #endif -} - -uint32_t add8unsigned(uint32_t a, uint32_t b) { - #if (defined (__ARM_FEATURE_DSP) && (__ARM_FEATURE_DSP == 1)) - // Subtract out the DC offset, add and then shift back. - a = __USUB8(a, 0x80808080); - b = __USUB8(b, 0x80808080); - uint32_t sum = __QADD8(a, b); - return __UADD8(sum, 0x80808080); - #else - uint32_t result = 0; - for (int8_t i = 0; i < 4; i++) { - int8_t ai = (a >> (sizeof(uint8_t) * 8 * i)) - 128; - int8_t bi = (b >> (sizeof(uint8_t) * 8 * i)) - 128; - int32_t intermediate = (int32_t) ai + bi; - if (intermediate > UCHAR_MAX) { - intermediate = UCHAR_MAX; - } - result |= ((uint8_t) intermediate + 128) << (sizeof(uint8_t) * 8 * i); - } - return result; - #endif -} - -uint32_t add16signed(uint32_t a, uint32_t b) { - #if (defined (__ARM_FEATURE_DSP) && (__ARM_FEATURE_DSP == 1)) - return __QADD16(a, b); - #else - uint32_t result = 0; - for (int8_t i = 0; i < 2; i++) { - int16_t ai = a >> (sizeof(int16_t) * 8 * i); - int16_t bi = b >> (sizeof(int16_t) * 8 * i); - int32_t intermediate = (int32_t) ai + bi; - if (intermediate > SHRT_MAX) { - intermediate = SHRT_MAX; - } else if (intermediate < SHRT_MIN) { - intermediate = SHRT_MIN; - } - result |= (((uint32_t) intermediate) & 0xffff) << (sizeof(int16_t) * 8 * i); - } - return result; - #endif -} - -uint32_t add16unsigned(uint32_t a, uint32_t b) { - #if (defined (__ARM_FEATURE_DSP) && (__ARM_FEATURE_DSP == 1)) - // Subtract out the DC offset, add and then shift back. - a = __USUB16(a, 0x80008000); - b = __USUB16(b, 0x80008000); - uint32_t sum = __QADD16(a, b); - return __UADD16(sum, 0x80008000); - #else - uint32_t result = 0; - for (int8_t i = 0; i < 2; i++) { - int16_t ai = (a >> (sizeof(uint16_t) * 8 * i)) - 0x8000; - int16_t bi = (b >> (sizeof(uint16_t) * 8 * i)) - 0x8000; - int32_t intermediate = (int32_t) ai + bi; - if (intermediate > USHRT_MAX) { - intermediate = USHRT_MAX; - } - result |= ((uint16_t) intermediate + 0x8000) << (sizeof(int16_t) * 8 * i); - } - return result; - #endif -} - -audioio_get_buffer_result_t audioio_mixer_get_buffer(audioio_mixer_obj_t* self, - bool single_channel, - uint8_t channel, - uint8_t** buffer, - uint32_t* buffer_length) { - if (!single_channel) { - channel = 0; - } - - uint32_t channel_read_count = self->left_read_count; - if (channel == 1) { - channel_read_count = self->right_read_count; - } - *buffer_length = self->len; - - bool need_more_data = self->read_count == channel_read_count; - if (need_more_data) { - uint32_t* word_buffer; - if (self->use_first_buffer) { - *buffer = (uint8_t*) self->first_buffer; - word_buffer = self->first_buffer; - } else { - *buffer = (uint8_t*) self->second_buffer; - word_buffer = self->second_buffer; - } - self->use_first_buffer = !self->use_first_buffer; - bool voices_active = false; - for (int32_t v = 0; v < self->voice_count; v++) { - audioio_mixer_voice_t* voice = &self->voice[v]; - - uint32_t j = 0; - bool voice_done = voice->sample == NULL; - for (uint32_t i = 0; i < self->len / sizeof(uint32_t); i++) { - if (!voice_done && j >= voice->buffer_length) { - if (!voice->more_data) { - if (voice->loop) { - audiosample_reset_buffer(voice->sample, false, 0); - } else { - voice->sample = NULL; - voice_done = true; - } - } - if (!voice_done) { - // Load another buffer - audioio_get_buffer_result_t result = audiosample_get_buffer(voice->sample, false, 0, (uint8_t**) &voice->remaining_buffer, &voice->buffer_length); - // Track length in terms of words. - voice->buffer_length /= sizeof(uint32_t); - voice->more_data = result == GET_BUFFER_MORE_DATA; - j = 0; - } - } - // First active voice gets copied over verbatim. - uint32_t sample_value; - if (voice_done) { - // Exit early if another voice already set all samples once. - if (voices_active) { - continue; - } - sample_value = 0; - if (!self->samples_signed) { - if (self->bits_per_sample == 8) { - sample_value = 0x7f7f7f7f; - } else { - sample_value = 0x7fff7fff; - } - } - } else { - sample_value = voice->remaining_buffer[j]; - } - - if (!voices_active) { - word_buffer[i] = sample_value; - } else { - if (self->bits_per_sample == 8) { - if (self->samples_signed) { - word_buffer[i] = add8signed(word_buffer[i], sample_value); - } else { - word_buffer[i] = add8unsigned(word_buffer[i], sample_value); - } - } else { - if (self->samples_signed) { - word_buffer[i] = add16signed(word_buffer[i], sample_value); - } else { - word_buffer[i] = add16unsigned(word_buffer[i], sample_value); - } - } - } - j++; - } - voice->buffer_length -= j; - voice->remaining_buffer += j; - - voices_active = true; - } - - self->read_count += 1; - } else if (!self->use_first_buffer) { - *buffer = (uint8_t*) self->first_buffer; - } else { - *buffer = (uint8_t*) self->second_buffer; - } - - - if (channel == 0) { - self->left_read_count += 1; - } else if (channel == 1) { - self->right_read_count += 1; - *buffer = *buffer + self->bits_per_sample / 8; - } - return GET_BUFFER_MORE_DATA; -} - -void audioio_mixer_get_buffer_structure(audioio_mixer_obj_t* self, bool single_channel, - bool* single_buffer, bool* samples_signed, - uint32_t* max_buffer_length, uint8_t* spacing) { - *single_buffer = false; - *samples_signed = self->samples_signed; - *max_buffer_length = self->len; - if (single_channel) { - *spacing = self->channel_count; - } else { - *spacing = 1; - } -} |