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/*
* Copyright 2023 jacqueline <me@jacqueline.id.au>
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#include "vorbis.hpp"
#include <cstdint>
#include <cstring>
#include <optional>
#include "esp_heap_caps.h"
#include "esp_log.h"
#include "ivorbiscodec.h"
#include "ivorbisfile.h"
#include "codec.hpp"
#include "sample.hpp"
#include "types.hpp"
namespace codecs {
[[maybe_unused]] static constexpr char kTag[] = "vorbis";
static size_t read_cb(void* ptr, size_t size, size_t nmemb, void* instance) {
IStream* source = reinterpret_cast<IStream*>(instance);
return source->Read({reinterpret_cast<std::byte*>(ptr), size * nmemb});
}
static int seek_cb(void* instance, tremor_ogg_int64_t offset, int whence) {
IStream* source = reinterpret_cast<IStream*>(instance);
if (!source->CanSeek()) {
return -1;
}
IStream::SeekFrom from;
switch (whence) {
case SEEK_CUR:
from = IStream::SeekFrom::kCurrentPosition;
break;
case SEEK_END:
from = IStream::SeekFrom::kEndOfStream;
break;
case SEEK_SET:
from = IStream::SeekFrom::kStartOfStream;
break;
default:
return -1;
}
source->SeekTo(offset, from);
return 0;
}
static int close_cb(void* src) {
return 0;
}
static long tell_cb(void* src) {
IStream* source = reinterpret_cast<IStream*>(src);
return source->CurrentPosition();
}
static const ov_callbacks kCallbacks{
.read_func = read_cb,
.seek_func = seek_cb,
.close_func = close_cb,
.tell_func = tell_cb, // Not seekable
};
TremorVorbisDecoder::TremorVorbisDecoder()
: input_(),
vorbis_(reinterpret_cast<TremorOggVorbis_File*>(
heap_caps_malloc(sizeof(TremorOggVorbis_File),
MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT))) {}
TremorVorbisDecoder::~TremorVorbisDecoder() {
ov_clear(vorbis_.get());
}
auto TremorVorbisDecoder::OpenStream(std::shared_ptr<IStream> input,
uint32_t offset)
-> cpp::result<OutputFormat, Error> {
int res = ov_open_callbacks(input.get(), vorbis_.get(), NULL, 0, kCallbacks);
if (res < 0) {
std::string err;
switch (res) {
case OV_EREAD:
err = "OV_EREAD";
break;
case OV_ENOTVORBIS:
err = "OV_ENOTVORBIS";
break;
case OV_EVERSION:
err = "OV_EVERSION";
break;
case OV_EBADHEADER:
err = "OV_EBADHEADER";
break;
case OV_EFAULT:
err = "OV_EFAULT";
break;
default:
err = "unknown";
}
ESP_LOGE(kTag, "error beginning stream: %s", err.c_str());
return cpp::fail(Error::kMalformedData);
}
vorbis_info* info = ov_info(vorbis_.get(), -1);
if (info == NULL) {
ESP_LOGE(kTag, "failed to get stream info");
return cpp::fail(Error::kMalformedData);
}
auto l = ov_pcm_total(vorbis_.get(), -1);
std::optional<uint32_t> length;
if (l > 0) {
length = l * info->channels;
}
if (offset && ov_time_seek(vorbis_.get(), offset * 1000) != 0) {
return cpp::fail(Error::kInternalError);
}
return OutputFormat{
.num_channels = static_cast<uint8_t>(info->channels),
.sample_rate_hz = static_cast<uint32_t>(info->rate),
.total_samples = length,
};
}
auto TremorVorbisDecoder::DecodeTo(std::span<sample::Sample> output)
-> cpp::result<OutputInfo, Error> {
int unused = 0;
long bytes_written =
ov_read(vorbis_.get(), reinterpret_cast<char*>(output.data()),
((output.size() - 1) * sizeof(sample::Sample)), &unused);
if (bytes_written == OV_HOLE) {
ESP_LOGE(kTag, "got OV_HOLE");
return OutputInfo{
.samples_written = 0,
.is_stream_finished = false,
};
} else if (bytes_written == OV_EBADLINK) {
ESP_LOGE(kTag, "got OV_EBADLINK");
return cpp::fail(Error::kMalformedData);
} else if (bytes_written == OV_EINVAL) {
return cpp::fail(Error::kMalformedData);
}
return OutputInfo{
.samples_written =
static_cast<size_t>(bytes_written / sizeof(sample::Sample)),
.is_stream_finished = bytes_written == 0,
};
}
} // namespace codecs
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