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filter/*: use std::span instead of ConstBuffer

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This commit is contained in:
Max Kellermann 2022-07-04 18:12:12 +02:00
parent 18ebd42c52
commit 67c6d111a8
16 changed files with 50 additions and 86 deletions
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27
src/filter/Filter.cxx
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@ -1,27 +0,0 @@
/*
* Copyright 2003-2021 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "Filter.hxx"
#include "util/ConstBuffer.hxx"
ConstBuffer<void>
Filter::Flush()
{
return nullptr;
}

10
src/filter/Filter.hxx
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@ -23,8 +23,8 @@
#include "pcm/AudioFormat.hxx"
#include <cassert>
template<typename T> struct ConstBuffer;
#include <cstddef>
#include <span>
class Filter {
protected:
@ -61,7 +61,7 @@ public:
* invalidated by deleting this object or the next FilterPCM()
* or Reset() call)
*/
virtual ConstBuffer<void> FilterPCM(ConstBuffer<void> src) = 0;
virtual std::span<const std::byte> FilterPCM(std::span<const std::byte> src) = 0;
/**
* Flush pending data and return it. This should be called
@ -69,7 +69,9 @@ public:
*
* Throws on error.
*/
virtual ConstBuffer<void> Flush();
virtual std::span<const std::byte> Flush() {
return {};
}
};
#endif

3
src/filter/NullFilter.hxx
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@ -21,13 +21,12 @@
#define MPD_NULL_FILTER_HXX
#include "filter/Filter.hxx"
#include "util/ConstBuffer.hxx"
class NullFilter final : public Filter {
public:
explicit NullFilter(const AudioFormat &af):Filter(af) {}
ConstBuffer<void> FilterPCM(ConstBuffer<void> src) override {
std::span<const std::byte> FilterPCM(std::span<const std::byte> src) override {
return src;
}
};

5
src/filter/Observer.cxx
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@ -20,7 +20,6 @@
#include "Observer.hxx"
#include "Filter.hxx"
#include "Prepared.hxx"
#include "util/ConstBuffer.hxx"
#include <cassert>
@ -81,11 +80,11 @@ public:
filter->Reset();
}
ConstBuffer<void> FilterPCM(ConstBuffer<void> src) override {
std::span<const std::byte> FilterPCM(std::span<const std::byte> src) override {
return filter->FilterPCM(src);
}
ConstBuffer<void> Flush() override {
std::span<const std::byte> Flush() override {
return filter->Flush();
}
};

1
src/filter/meson.build
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@ -1,7 +1,6 @@
filter_api = static_library(
'filter_api',
'Observer.cxx',
'Filter.cxx',
include_directories: inc,
)

9
src/filter/plugins/ConvertFilterPlugin.cxx
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@ -22,7 +22,6 @@
#include "filter/Prepared.hxx"
#include "pcm/AudioFormat.hxx"
#include "pcm/Convert.hxx"
#include "util/ConstBuffer.hxx"
#include <cassert>
#include <memory>
@ -50,9 +49,9 @@ public:
state->Reset();
}
ConstBuffer<void> FilterPCM(ConstBuffer<void> src) override;
std::span<const std::byte> FilterPCM(std::span<const std::byte> src) override;
ConstBuffer<void> Flush() override {
std::span<const std::byte> Flush() override {
return state
? state->Flush()
: std::span<const std::byte>{};
@ -102,8 +101,8 @@ PreparedConvertFilter::Open(AudioFormat &audio_format)
return std::make_unique<ConvertFilter>(audio_format);
}
ConstBuffer<void>
ConvertFilter::FilterPCM(ConstBuffer<void> src)
std::span<const std::byte>
ConvertFilter::FilterPCM(std::span<const std::byte> src)
{
return state
? state->Convert(src)

11
src/filter/plugins/FfmpegFilter.cxx
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@ -20,7 +20,6 @@
#include "FfmpegFilter.hxx"
#include "lib/ffmpeg/Interleave.hxx"
#include "lib/ffmpeg/SampleFormat.hxx"
#include "util/ConstBuffer.hxx"
extern "C" {
#include <libavfilter/buffersrc.h>
@ -46,8 +45,8 @@ FfmpegFilter::FfmpegFilter(const AudioFormat &in_audio_format,
{
}
ConstBuffer<void>
FfmpegFilter::FilterPCM(ConstBuffer<void> src)
std::span<const std::byte>
FfmpegFilter::FilterPCM(std::span<const std::byte> src)
{
/* submit source data into the FFmpeg audio buffer source */
@ -55,11 +54,11 @@ FfmpegFilter::FilterPCM(ConstBuffer<void> src)
frame->format = in_format;
frame->sample_rate = in_sample_rate;
frame->channels = in_channels;
frame->nb_samples = src.size / in_audio_frame_size;
frame->nb_samples = src.size() / in_audio_frame_size;
frame.GetBuffer();
memcpy(frame.GetData(0), src.data, src.size);
memcpy(frame.GetData(0), src.data(), src.size());
int err = av_buffersrc_add_frame(&buffer_src, frame.get());
if (err < 0)
@ -72,7 +71,7 @@ FfmpegFilter::FilterPCM(ConstBuffer<void> src)
err = av_buffersink_get_frame(&buffer_sink, frame.get());
if (err < 0) {
if (err == AVERROR(EAGAIN) || err == AVERROR_EOF)
return nullptr;
return {};
throw MakeFfmpegError(err, "av_buffersink_get_frame() failed");
}

2
src/filter/plugins/FfmpegFilter.hxx
View File

@ -55,7 +55,7 @@ public:
AVFilterContext &_buffer_sink) noexcept;
/* virtual methods from class Filter */
ConstBuffer<void> FilterPCM(ConstBuffer<void> src) override;
std::span<const std::byte> FilterPCM(std::span<const std::byte> src) override;
};
#endif

15
src/filter/plugins/NormalizeFilterPlugin.cxx
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@ -24,7 +24,6 @@
#include "pcm/Buffer.hxx"
#include "pcm/AudioFormat.hxx"
#include "pcm/AudioCompress/compress.h"
#include "util/ConstBuffer.hxx"
#include <string.h>
@ -47,7 +46,7 @@ public:
NormalizeFilter &operator=(const NormalizeFilter &) = delete;
/* virtual methods from class Filter */
ConstBuffer<void> FilterPCM(ConstBuffer<void> src) override;
std::span<const std::byte> FilterPCM(std::span<const std::byte> src) override;
};
class PreparedNormalizeFilter final : public PreparedFilter {
@ -70,14 +69,14 @@ PreparedNormalizeFilter::Open(AudioFormat &audio_format)
return std::make_unique<NormalizeFilter>(audio_format);
}
ConstBuffer<void>
NormalizeFilter::FilterPCM(ConstBuffer<void> src)
std::span<const std::byte>
NormalizeFilter::FilterPCM(std::span<const std::byte> src)
{
auto *dest = (int16_t *)buffer.Get(src.size);
memcpy(dest, src.data, src.size);
auto *dest = (int16_t *)buffer.Get(src.size());
memcpy(dest, src.data(), src.size());
Compressor_Process_int16(compressor, dest, src.size / 2);
return { (const void *)dest, src.size };
Compressor_Process_int16(compressor, dest, src.size() / 2);
return { (const std::byte *)dest, src.size() };
}
const FilterPlugin normalize_filter_plugin = {

7
src/filter/plugins/ReplayGainFilterPlugin.cxx
View File

@ -25,7 +25,6 @@
#include "mixer/MixerControl.hxx"
#include "pcm/AudioFormat.hxx"
#include "pcm/Volume.hxx"
#include "util/ConstBuffer.hxx"
#include "util/Domain.hxx"
#include "Idle.hxx"
#include "Log.hxx"
@ -109,7 +108,7 @@ public:
void Update();
/* virtual methods from class Filter */
ConstBuffer<void> FilterPCM(ConstBuffer<void> src) override;
std::span<const std::byte> FilterPCM(std::span<const std::byte> src) override;
};
class PreparedReplayGainFilter final : public PreparedFilter {
@ -197,8 +196,8 @@ PreparedReplayGainFilter::Open(AudioFormat &af)
af, mixer, base);
}
ConstBuffer<void>
ReplayGainFilter::FilterPCM(ConstBuffer<void> src)
std::span<const std::byte>
ReplayGainFilter::FilterPCM(std::span<const std::byte> src)
{
return mixer != nullptr
? std::span<const std::byte>{src}

13
src/filter/plugins/RouteFilterPlugin.cxx
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@ -49,7 +49,6 @@
#include "pcm/Silence.hxx"
#include "util/StringStrip.hxx"
#include "util/RuntimeError.hxx"
#include "util/ConstBuffer.hxx"
#include <array>
#include <cstdint>
@ -94,7 +93,7 @@ public:
const std::array<int8_t, MAX_CHANNELS> &_sources);
/* virtual methods from class Filter */
ConstBuffer<void> FilterPCM(ConstBuffer<void> src) override;
std::span<const std::byte> FilterPCM(std::span<const std::byte> src) override;
};
class PreparedRouteFilter final : public PreparedFilter {
@ -221,15 +220,15 @@ PreparedRouteFilter::Open(AudioFormat &audio_format)
sources);
}
ConstBuffer<void>
RouteFilter::FilterPCM(ConstBuffer<void> src)
std::span<const std::byte>
RouteFilter::FilterPCM(std::span<const std::byte> src)
{
size_t number_of_frames = src.size / input_frame_size;
size_t number_of_frames = src.size() / input_frame_size;
const size_t bytes_per_frame_per_channel = input_format.GetSampleSize();
// A moving pointer that always refers to channel 0 in the input, at the currently handled frame
const auto *base_source = (const uint8_t *)src.data;
const auto *base_source = (const uint8_t *)src.data();
// Grow our reusable buffer, if needed, and set the moving pointer
const size_t result_size = number_of_frames * output_frame_size;
@ -268,7 +267,7 @@ RouteFilter::FilterPCM(ConstBuffer<void> src)
}
// Here it is, ladies and gentlemen! Rerouted data!
return { result, result_size };
return { (const std::byte *)result, result_size };
}
const FilterPlugin route_filter_plugin = {

9
src/filter/plugins/TwoFilters.cxx
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@ -19,21 +19,20 @@
#include "TwoFilters.hxx"
#include "pcm/AudioFormat.hxx"
#include "util/ConstBuffer.hxx"
#include "util/RuntimeError.hxx"
#include "util/StringBuffer.hxx"
ConstBuffer<void>
TwoFilters::FilterPCM(ConstBuffer<void> src)
std::span<const std::byte>
TwoFilters::FilterPCM(std::span<const std::byte> src)
{
return second->FilterPCM(first->FilterPCM(src));
}
ConstBuffer<void>
std::span<const std::byte>
TwoFilters::Flush()
{
auto result = first->Flush();
if (!result.IsNull())
if (result.data() != nullptr)
/* Flush() output from the first Filter must be
filtered by the second Filter */
return second->FilterPCM(result);

4
src/filter/plugins/TwoFilters.hxx
View File

@ -44,8 +44,8 @@ public:
second->Reset();
}
ConstBuffer<void> FilterPCM(ConstBuffer<void> src) override;
ConstBuffer<void> Flush() override;
std::span<const std::byte> FilterPCM(std::span<const std::byte> src) override;
std::span<const std::byte> Flush() override;
};
/**

7
src/filter/plugins/VolumeFilterPlugin.cxx
View File

@ -22,7 +22,6 @@
#include "filter/Prepared.hxx"
#include "pcm/Volume.hxx"
#include "pcm/AudioFormat.hxx"
#include "util/ConstBuffer.hxx"
class VolumeFilter final : public Filter {
PcmVolume pv;
@ -43,7 +42,7 @@ public:
}
/* virtual methods from class Filter */
ConstBuffer<void> FilterPCM(ConstBuffer<void> src) override;
std::span<const std::byte> FilterPCM(std::span<const std::byte> src) override;
};
class PreparedVolumeFilter final : public PreparedFilter {
@ -58,8 +57,8 @@ PreparedVolumeFilter::Open(AudioFormat &audio_format)
return std::make_unique<VolumeFilter>(audio_format);
}
ConstBuffer<void>
VolumeFilter::FilterPCM(ConstBuffer<void> src)
std::span<const std::byte>
VolumeFilter::FilterPCM(std::span<const std::byte> src)
{
return pv.Apply(src);
}

2
src/output/Source.cxx
View File

@ -255,5 +255,5 @@ AudioOutputSource::Flush()
{
return filter
? filter->Flush()
: nullptr;
: std::span<const std::byte>{};
}

11
test/run_filter.cxx
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@ -30,7 +30,6 @@
#include "mixer/MixerControl.hxx"
#include "system/Error.hxx"
#include "io/FileDescriptor.hxx"
#include "util/ConstBuffer.hxx"
#include "util/StringBuffer.hxx"
#include "util/RuntimeError.hxx"
#include "util/PrintException.hxx"
@ -102,22 +101,22 @@ try {
FileDescriptor output_fd(STDOUT_FILENO);
while (true) {
char buffer[4096];
std::byte buffer[4096];
ssize_t nbytes = ReadFrames(input_fd, buffer, sizeof(buffer),
in_frame_size);
if (nbytes == 0)
break;
auto dest = filter->FilterPCM({(const void *)buffer, (size_t)nbytes});
output_fd.FullWrite(dest.data, dest.size);
auto dest = filter->FilterPCM(std::span{buffer}.first(nbytes));
output_fd.FullWrite(dest.data(), dest.size());
}
while (true) {
auto dest = filter->Flush();
if (dest.IsNull())
if (dest.data() == nullptr)
break;
output_fd.FullWrite(dest.data, dest.size);
output_fd.FullWrite(dest.data(), dest.size());
}
/* cleanup and exit */