diff options
Diffstat (limited to 'src/codecs/miniflac.cpp')
| -rw-r--r-- | src/codecs/miniflac.cpp | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/src/codecs/miniflac.cpp b/src/codecs/miniflac.cpp deleted file mode 100644 index 45e063c7..00000000 --- a/src/codecs/miniflac.cpp +++ /dev/null @@ -1,213 +0,0 @@ -/* - * Copyright 2023 jacqueline <me@jacqueline.id.au> - * - * SPDX-License-Identifier: GPL-3.0-only - */ - -#include "miniflac.hpp" -#include <stdint.h> - -#include <cstdint> -#include <cstdlib> - -#include "esp_heap_caps.h" -#include "esp_log.h" -#include "miniflac.h" -#include "result.hpp" -#include "sample.hpp" - -namespace codecs { - -[[maybe_unused]] static const char kTag[] = "flac"; - -static constexpr size_t kMaxFrameSize = 4608; - -MiniFlacDecoder::MiniFlacDecoder() - : input_(), - buffer_(), - flac_(reinterpret_cast<miniflac_t*>( - heap_caps_malloc(sizeof(miniflac_t), - MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT))), - current_sample_() { - miniflac_init(flac_.get(), MINIFLAC_CONTAINER_UNKNOWN); - for (int i = 0; i < samples_by_channel_.size(); i++) { - uint32_t caps; - if (i == 0) { - caps = MALLOC_CAP_8BIT | MALLOC_CAP_INTERNAL; - } else { - // FIXME: We can *almost* fit two channels into internal ram, but we're a - // few KiB shy of being able to do it safely. - caps = MALLOC_CAP_SPIRAM; - } - samples_by_channel_[i] = reinterpret_cast<int32_t*>( - heap_caps_malloc(kMaxFrameSize * sizeof(int32_t), caps)); - } -} - -MiniFlacDecoder::~MiniFlacDecoder() { - for (int i = 0; i < samples_by_channel_.size(); i++) { - heap_caps_free(samples_by_channel_[i]); - } -} - -auto MiniFlacDecoder::OpenStream(std::shared_ptr<IStream> input, - uint32_t offset) - -> cpp::result<OutputFormat, Error> { - input_ = input; - - MINIFLAC_RESULT res; - auto read_until_result = [&](auto fn) { - while (true) { - buffer_.ConsumeBytes(fn); - if (res == MINIFLAC_CONTINUE && !buffer_.Refill(input_.get())) { - continue; - } - break; - } - }; - - uint32_t sample_rate = 0; - - read_until_result([&](cpp::span<std::byte> buf) -> size_t { - uint32_t bytes_used = 0; - res = miniflac_streaminfo_sample_rate( - flac_.get(), reinterpret_cast<const uint8_t*>(buf.data()), - buf.size_bytes(), &bytes_used, &sample_rate); - return bytes_used; - }); - - if (res != MINIFLAC_OK) { - return cpp::fail(Error::kMalformedData); - } - - uint8_t channels = 0; - - read_until_result([&](cpp::span<std::byte> buf) -> size_t { - uint32_t bytes_used = 0; - res = miniflac_streaminfo_channels( - flac_.get(), reinterpret_cast<const uint8_t*>(buf.data()), - buf.size_bytes(), &bytes_used, &channels); - return bytes_used; - }); - - if (res != MINIFLAC_OK) { - return cpp::fail(Error::kMalformedData); - } - - uint64_t total_samples = 0; - - read_until_result([&](cpp::span<std::byte> buf) -> size_t { - uint32_t bytes_used = 0; - res = miniflac_streaminfo_total_samples( - flac_.get(), reinterpret_cast<const uint8_t*>(buf.data()), - buf.size_bytes(), &bytes_used, &total_samples); - return bytes_used; - }); - - if (res != MINIFLAC_OK) { - return cpp::fail(Error::kMalformedData); - } - - if (channels == 0 || channels > 2) { - return cpp::fail(Error::kMalformedData); - } - - if (offset) { - // TODO: This assumes a constant sample_rate - uint64_t target_sample = sample_rate * offset; - ESP_LOGI(kTag, "seeking to %lu seconds (sample=%llu)", offset, - target_sample); - - while (true) { - read_until_result([&](cpp::span<std::byte> buf) -> size_t { - uint32_t bytes_used = 0; - res = miniflac_sync(flac_.get(), - reinterpret_cast<const uint8_t*>(buf.data()), - buf.size_bytes(), &bytes_used); - return bytes_used; - }); - - if (res != MINIFLAC_OK) { - return cpp::fail(Error::kMalformedData); - } - - if (!miniflac_is_frame(flac_.get())) { - continue; - } - - uint64_t samples_in_frame = miniflac_frame_block_size(flac_.get()); - if (samples_in_frame <= target_sample) { - target_sample -= samples_in_frame; - } else { - break; - } - } - } - - OutputFormat format{ - .num_channels = static_cast<uint8_t>(channels), - .sample_rate_hz = static_cast<uint32_t>(sample_rate), - .total_samples = total_samples * channels, - }; - return format; -} - -auto MiniFlacDecoder::DecodeTo(cpp::span<sample::Sample> output) - -> cpp::result<OutputInfo, Error> { - bool is_eof = false; - - if (!current_sample_) { - MINIFLAC_RESULT res = MINIFLAC_CONTINUE; - while (res == MINIFLAC_CONTINUE && !is_eof) { - is_eof = buffer_.Refill(input_.get()); - buffer_.ConsumeBytes([&](cpp::span<std::byte> buf) -> size_t { - // FIXME: We should do a miniflac_sync first, in order to check that - // our sample buffers have enough space for the next frame. - uint32_t bytes_read = 0; - res = miniflac_decode( - flac_.get(), reinterpret_cast<const uint8_t*>(buf.data()), - buf.size_bytes(), &bytes_read, samples_by_channel_.data()); - return bytes_read; - }); - } - - if (res == MINIFLAC_OK) { - current_sample_ = 0; - } else if (is_eof) { - return OutputInfo{ - .samples_written = 0, - .is_stream_finished = true, - }; - } else { - return cpp::fail(Error::kMalformedData); - } - } - - size_t samples_written = 0; - if (current_sample_) { - while (*current_sample_ < flac_->frame.header.block_size) { - if (samples_written + flac_->frame.header.channels >= output.size()) { - // We can't fit the next full PCM frame into the buffer. - return OutputInfo{.samples_written = samples_written, - .is_stream_finished = false}; - } - - for (int channel = 0; channel < flac_->frame.header.channels; channel++) { - output[samples_written++] = - sample::FromSigned(samples_by_channel_[channel][*current_sample_], - flac_->frame.header.bps); - } - (*current_sample_)++; - } - } - - current_sample_.reset(); - return OutputInfo{.samples_written = samples_written, - .is_stream_finished = samples_written == 0 && is_eof}; -} - -auto MiniFlacDecoder::SeekTo(size_t target) -> cpp::result<void, Error> { - return {}; -} - -} // namespace codecs |