From a7542598a0ce1fbd7722312dd863b1d40b0c2837 Mon Sep 17 00:00:00 2001 From: Jeff Epler Date: Fri, 30 Oct 2020 10:05:16 -0500 Subject: esp32s2: add I2SOut --- shared-module/audiocore/__init__.c | 60 ++++++++++++++++++++++++++++++++++++++ shared-module/audiocore/__init__.h | 8 +++++ 2 files changed, 68 insertions(+) (limited to 'shared-module') diff --git a/shared-module/audiocore/__init__.c b/shared-module/audiocore/__init__.c index ac9d41b60..7bdfe460c 100644 --- a/shared-module/audiocore/__init__.c +++ b/shared-module/audiocore/__init__.c @@ -70,3 +70,63 @@ void audiosample_get_buffer_structure(mp_obj_t sample_obj, bool single_channel, proto->get_buffer_structure(MP_OBJ_TO_PTR(sample_obj), single_channel, single_buffer, samples_signed, max_buffer_length, spacing); } + +void audiosample_convert_u8m_s16s(int16_t *buffer_out, const uint8_t *buffer_in, size_t nframes) { + for(;nframes--;) { + int16_t sample = (*buffer_in++ - 0x80) << 8; + *buffer_out++ = sample; + *buffer_out++ = sample; + } +} + + +void audiosample_convert_u8s_s16s(int16_t *buffer_out, const uint8_t *buffer_in, size_t nframes) { + size_t nsamples = 2*nframes; + for(;nsamples--;) { + int16_t sample = (*buffer_in++ - 0x80) << 8; + *buffer_out++ = sample; + } +} + +void audiosample_convert_s8m_s16s(int16_t *buffer_out, const int8_t *buffer_in, size_t nframes) { + for(;nframes--;) { + int16_t sample = (*buffer_in++) << 8; + *buffer_out++ = sample; + *buffer_out++ = sample; + } +} + + +void audiosample_convert_s8s_s16s(int16_t *buffer_out, const int8_t *buffer_in, size_t nframes) { + size_t nsamples = 2*nframes; + for(;nsamples--;) { + int16_t sample = (*buffer_in++) << 8; + *buffer_out++ = sample; + } +} + + +void audiosample_convert_u16m_s16s(int16_t *buffer_out, const uint16_t *buffer_in, size_t nframes) { + for(;nframes--;) { + int16_t sample = *buffer_in++ - 0x8000; + *buffer_out++ = sample; + *buffer_out++ = sample; + } +} + + +void audiosample_convert_u16s_s16s(int16_t *buffer_out, const uint16_t *buffer_in, size_t nframes) { + size_t nsamples = 2*nframes; + for(;nsamples--;) { + int16_t sample = *buffer_in++ - 0x8000; + *buffer_out++ = sample; + } +} + +void audiosample_convert_s16m_s16s(int16_t *buffer_out, const int16_t *buffer_in, size_t nframes) { + for(;nframes--;) { + int16_t sample = *buffer_in++; + *buffer_out++ = sample; + *buffer_out++ = sample; + } +} diff --git a/shared-module/audiocore/__init__.h b/shared-module/audiocore/__init__.h index 7a56454b8..ec2cf1cfa 100644 --- a/shared-module/audiocore/__init__.h +++ b/shared-module/audiocore/__init__.h @@ -74,4 +74,12 @@ void audiosample_get_buffer_structure(mp_obj_t sample_obj, bool single_channel, bool* single_buffer, bool* samples_signed, uint32_t* max_buffer_length, uint8_t* spacing); +void audiosample_convert_u8m_s16s(int16_t *buffer_out, const uint8_t *buffer_in, size_t nframes); +void audiosample_convert_u8s_s16s(int16_t *buffer_out, const uint8_t *buffer_in, size_t nframes); +void audiosample_convert_s8m_s16s(int16_t *buffer_out, const int8_t *buffer_in, size_t nframes); +void audiosample_convert_s8s_s16s(int16_t *buffer_out, const int8_t *buffer_in, size_t nframes); +void audiosample_convert_u16m_s16s(int16_t *buffer_out, const uint16_t *buffer_in, size_t nframes); +void audiosample_convert_u16s_s16s(int16_t *buffer_out, const uint16_t *buffer_in, size_t nframes); +void audiosample_convert_s16m_s16s(int16_t *buffer_out, const int16_t *buffer_in, size_t nframes); + #endif // MICROPY_INCLUDED_SHARED_MODULE_AUDIOCORE__INIT__H -- cgit v1.2.3