1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
/*
* Copyright 2023 jacqueline <me@jacqueline.id.au>
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#include "audio_decoder.hpp"
#include <cstdint>
#include <cstdlib>
#include <algorithm>
#include <cmath>
#include <cstddef>
#include <cstdint>
#include <cstring>
#include <deque>
#include <memory>
#include <variant>
#include "cbor.h"
#include "esp_err.h"
#include "esp_heap_caps.h"
#include "esp_log.h"
#include "freertos/portmacro.h"
#include "freertos/projdefs.h"
#include "freertos/queue.h"
#include "freertos/ringbuf.h"
#include "span.hpp"
#include "audio_converter.hpp"
#include "audio_events.hpp"
#include "audio_fsm.hpp"
#include "audio_sink.hpp"
#include "audio_source.hpp"
#include "codec.hpp"
#include "event_queue.hpp"
#include "fatfs_audio_input.hpp"
#include "sample.hpp"
#include "tasks.hpp"
#include "track.hpp"
#include "types.hpp"
#include "ui_fsm.hpp"
namespace audio {
static const char* kTag = "audio_dec";
static constexpr std::size_t kCodecBufferLength = 240 * 4;
Timer::Timer(const codecs::ICodec::OutputFormat& format)
: current_seconds_(0),
current_sample_in_second_(0),
samples_per_second_(format.sample_rate_hz * format.num_channels),
total_duration_seconds_(format.total_samples.value_or(0) /
format.num_channels / format.sample_rate_hz) {}
auto Timer::AddSamples(std::size_t samples) -> void {
bool incremented = false;
current_sample_in_second_ += samples;
while (current_sample_in_second_ >= samples_per_second_) {
current_seconds_++;
current_sample_in_second_ -= samples_per_second_;
incremented = true;
}
if (incremented) {
if (total_duration_seconds_ < current_seconds_) {
total_duration_seconds_ = current_seconds_;
}
PlaybackUpdate ev{.seconds_elapsed = current_seconds_,
.seconds_total = total_duration_seconds_};
events::Audio().Dispatch(ev);
events::Ui().Dispatch(ev);
}
}
auto Decoder::Start(std::shared_ptr<IAudioSource> source,
std::shared_ptr<SampleConverter> sink) -> Decoder* {
Decoder* task = new Decoder(source, sink);
tasks::StartPersistent<tasks::Type::kAudio>([=]() { task->Main(); });
return task;
}
Decoder::Decoder(std::shared_ptr<IAudioSource> source,
std::shared_ptr<SampleConverter> mixer)
: source_(source),
converter_(mixer),
codec_(),
timer_(),
current_format_() {
codec_buffer_ = {
reinterpret_cast<sample::Sample*>(heap_caps_calloc(
kCodecBufferLength, sizeof(sample::Sample), MALLOC_CAP_SPIRAM)),
kCodecBufferLength};
}
void Decoder::Main() {
for (;;) {
if (source_->HasNewStream() || !stream_) {
std::shared_ptr<codecs::IStream> new_stream = source_->NextStream();
if (new_stream && BeginDecoding(new_stream)) {
stream_ = new_stream;
} else {
continue;
}
}
if (ContinueDecoding()) {
events::Audio().Dispatch(internal::InputFileFinished{});
stream_.reset();
}
}
}
auto Decoder::BeginDecoding(std::shared_ptr<codecs::IStream> stream) -> bool {
codec_.reset(codecs::CreateCodecForType(stream->type()).value_or(nullptr));
if (!codec_) {
ESP_LOGE(kTag, "no codec found");
return false;
}
auto open_res = codec_->OpenStream(stream);
if (open_res.has_error()) {
ESP_LOGE(kTag, "codec failed to start: %s",
codecs::ICodec::ErrorString(open_res.error()).c_str());
return false;
}
if (open_res->total_samples) {
timer_.reset(new Timer(open_res.value()));
} else {
timer_.reset();
}
current_sink_format_ = IAudioOutput::Format{
.sample_rate = open_res->sample_rate_hz,
.num_channels = open_res->num_channels,
.bits_per_sample = 16,
};
ESP_LOGI(kTag, "stream started ok");
events::Audio().Dispatch(internal::InputFileOpened{});
return true;
}
auto Decoder::ContinueDecoding() -> bool {
auto res = codec_->DecodeTo(codec_buffer_);
if (res.has_error()) {
return true;
}
if (res->samples_written > 0) {
converter_->ConvertSamples(codec_buffer_.first(res->samples_written),
current_sink_format_.value(),
res->is_stream_finished);
}
if (timer_) {
timer_->AddSamples(res->samples_written);
}
return res->is_stream_finished;
}
} // namespace audio
|
