forked from Green-Sky/tomato
start sketching
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@ -74,6 +74,11 @@ add_executable(tomato
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./chat_gui4.hpp
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./chat_gui4.hpp
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./chat_gui4.cpp
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./chat_gui4.cpp
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./content/content.hpp
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./content/stream_reader.hpp
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./content/stream_reader_sdl_audio.hpp
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./content/stream_reader_sdl_audio.cpp
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)
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)
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target_compile_features(tomato PUBLIC cxx_std_17)
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target_compile_features(tomato PUBLIC cxx_std_17)
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48
src/content/content.hpp
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48
src/content/content.hpp
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#pragma once
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#include <entt/entity/registry.hpp>
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#include <entt/entity/handle.hpp>
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#include <entt/container/dense_set.hpp>
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#include <solanaceae/contact/contact_model3.hpp>
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#include <solanaceae/message3/registry_message_model.hpp>
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#include <solanaceae/file/file2.hpp>
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enum class Content1 : uint32_t {};
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using ContentRegistry = entt::basic_registry<Content1>;
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using ContentHandle = entt::basic_handle<ContentRegistry>;
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namespace Content::Components {
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// or something
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struct TagFile {};
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struct TagAudioStream {};
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struct TagVideoStream {};
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// the associated messages, if any
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// useful if you want to update progress on the message
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struct Messages {
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std::vector<Message3Handle> messages;
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};
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// ?
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struct SuspectedParticipants {
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entt::dense_set<Contact3> participants;
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};
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struct ReadHeadHint {
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// points to the first byte we want
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// this is just a hint, that can be set from outside
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// to guide the sequential "piece picker" strategy
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// the strategy *should* set this to the first byte we dont yet have
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uint64_t offset_into_file {0u};
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};
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} // Content::Components
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// TODO: i have no idea
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struct RawFile2ReadFromContentFactoryI {
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virtual std::shared_ptr<File2I> open(ContentHandle h) = 0;
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};
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15
src/content/stream_reader.hpp
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15
src/content/stream_reader.hpp
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#pragma once
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#include <solanaceae/util/span.hpp>
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// most media that can be counted as "stream" comes in packets/frames/messages
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// so this class provides an interface for ideal async fetching of frames
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struct RawFrameStreamReaderI {
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// return the number of ready frames in cache
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// returns -1 if unknown
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virtual int64_t have(void) = 0;
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// get next frame, empty if none
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virtual ByteSpan getNext(void) = 0;
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};
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39
src/content/stream_reader_sdl_audio.cpp
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39
src/content/stream_reader_sdl_audio.cpp
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#include "./stream_reader_sdl_audio.hpp"
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SDLAudioFrameStreamReader::SDLAudioFrameStreamReader(int32_t buffer_size) : _buffer_size(buffer_size), _stream{nullptr, &SDL_DestroyAudioStream} {
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_buffer.resize(_buffer_size);
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const SDL_AudioSpec spec = { SDL_AUDIO_S16, 1, 48000 };
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_stream = {
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SDL_OpenAudioDeviceStream(SDL_AUDIO_DEVICE_DEFAULT_CAPTURE, &spec, nullptr, nullptr),
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&SDL_DestroyAudioStream
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};
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}
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Span<int16_t> SDLAudioFrameStreamReader::getNextAudioFrame(void) {
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const int32_t needed_bytes = (_buffer.size() - _remaining_size) * sizeof(int16_t);
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const auto read_bytes = SDL_GetAudioStreamData(_stream.get(), _buffer.data()+_remaining_size, needed_bytes);
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if (read_bytes < 0) {
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// error
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return {};
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}
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if (read_bytes < needed_bytes) {
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// HACK: we are just assuming here that sdl never gives us half a sample!
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_remaining_size += read_bytes / sizeof(int16_t);
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return {};
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}
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_remaining_size = 0;
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return Span<int16_t>{_buffer};
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}
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int64_t SDLAudioFrameStreamReader::have(void) {
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return -1;
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}
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ByteSpan SDLAudioFrameStreamReader::getNext(void) {
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auto next_frame_span = getNextAudioFrame();
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return ByteSpan{reinterpret_cast<const uint8_t*>(next_frame_span.ptr), next_frame_span.size};
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}
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31
src/content/stream_reader_sdl_audio.hpp
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31
src/content/stream_reader_sdl_audio.hpp
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#pragma once
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#include "./stream_reader.hpp"
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#include <SDL3/SDL.h>
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#include <cstdint>
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#include <cstdio>
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#include <memory>
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struct SDLAudioFrameStreamReader : public RawFrameStreamReaderI {
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// count samples per buffer
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const int32_t _buffer_size {1024};
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std::vector<int16_t> _buffer;
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size_t _remaining_size {0}; // data still in buffer, that was remaining from last call and not enough to fill a full frame
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// meh, empty default
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std::unique_ptr<SDL_AudioStream, decltype(&SDL_DestroyAudioStream)> _stream;
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// buffer_size in number of samples
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SDLAudioFrameStreamReader(int32_t buffer_size = 1024);
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// data owned by StreamReader, overwritten by next call to getNext*()
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Span<int16_t> getNextAudioFrame(void);
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public: // interface
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int64_t have(void) override;
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ByteSpan getNext(void) override;
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};
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