RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-27 01:47:35 +00:00
Code Issues Activity Actions

LibAudio: Add generic Audio::Loader class

Browse source 
The Audio::Loader class is able to load different types of audio files
by using a generic plugin interface for all file formats. Every new
loader will have to derive from Audio::LoaderPlugin to provide a common
API.

This makes it easy to add support for more audio file formats in the future.
This commit is contained in:
Julian Offenhäuser 2020-12-01 19:55:41 +01:00 • committed by Andreas Kling
parent 0b086c759a
commit 1f47b01e3b
5 changed files with 161 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

31
Libraries/LibAudio/WavLoader.h
View file

@ -31,33 +31,38 @@
#include <AK/String.h>
#include <AK/StringView.h>
#include <LibAudio/Buffer.h>
#include <LibAudio/Loader.h>
#include <LibCore/File.h>
namespace Audio {
class Buffer;
// Parses a WAV file and produces an Audio::Buffer.
class WavLoader {
class WavLoaderPlugin : public LoaderPlugin {
public:
explicit WavLoader(const StringView& path);
explicit WavLoaderPlugin(const StringView& path);
bool has_error() const { return !m_error_string.is_null(); }
const char* error_string() { return m_error_string.characters(); }
virtual bool sniff() override;
RefPtr<Buffer> get_more_samples(size_t max_bytes_to_read_from_input = 128 * KiB);
virtual bool has_error() override { return !m_error_string.is_null(); }
virtual const char* error_string() override { return m_error_string.characters(); }
void reset();
void seek(const int position);
virtual RefPtr<Buffer> get_more_samples(size_t max_bytes_to_read_from_input = 128 * KiB) override;
int loaded_samples() const { return m_loaded_samples; }
int total_samples() const { return m_total_samples; }
u32 sample_rate() const { return m_sample_rate; }
u16 num_channels() const { return m_num_channels; }
u16 bits_per_sample() const { return m_bits_per_sample; }
RefPtr<Core::File> file() const { return m_file; }
virtual void reset() override;
virtual void seek(const int position) override;
virtual int loaded_samples() override { return m_loaded_samples; }
virtual int total_samples() override { return m_total_samples; }
virtual u32 sample_rate() override { return m_sample_rate; }
virtual u16 num_channels() override { return m_num_channels; }
virtual u16 bits_per_sample() override { return m_bits_per_sample; }
virtual RefPtr<Core::File> file() override { return m_file; }
private:
bool parse_header();
bool valid { false };
RefPtr<Core::File> m_file;
String m_error_string;
OwnPtr<ResampleHelper> m_resampler;