1 files changed, 0 insertions, 431 deletions
diff --git a/src/input/AlsaInputPlugin.cxx b/src/input/AlsaInputPlugin.cxx
deleted file mode 100644
index 29c6b2504..000000000
--- a/src/input/AlsaInputPlugin.cxx
+++ /dev/null
@@ -1,431 +0,0 @@
-/*
- * Copyright (C) 2003-2014 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.
- */
-
-/*
- * ALSA code based on an example by Paul Davis released under GPL here:
- * http://equalarea.com/paul/alsa-audio.html
- * and one by Matthias Nagorni, also GPL, here:
- * http://alsamodular.sourceforge.net/alsa_programming_howto.html
- */
-
-#include "config.h"
-#include "AlsaInputPlugin.hxx"
-#include "InputPlugin.hxx"
-#include "InputStream.hxx"
-#include "util/Domain.hxx"
-#include "util/Error.hxx"
-#include "util/StringUtil.hxx"
-#include "util/ReusableArray.hxx"
-#include "util/Cast.hxx"
-#include "Log.hxx"
-#include "event/MultiSocketMonitor.hxx"
-#include "event/DeferredMonitor.hxx"
-#include "event/Call.hxx"
-#include "thread/Mutex.hxx"
-#include "thread/Cond.hxx"
-#include "IOThread.hxx"
-
-#include <alsa/asoundlib.h>
-
-#include <assert.h>
-#include <string.h>
-
-static constexpr Domain alsa_input_domain("alsa");
-
-static constexpr const char *default_device = "hw:0,0";
-
-// the following defaults are because the PcmDecoderPlugin forces CD format
-static constexpr snd_pcm_format_t default_format = SND_PCM_FORMAT_S16;
-static constexpr int default_channels = 2; // stereo
-static constexpr unsigned int default_rate = 44100; // cd quality
-
-/**
- * This value should be the same as the read buffer size defined in
- * PcmDecoderPlugin.cxx:pcm_stream_decode().
- * We use it to calculate how many audio frames to buffer in the alsa driver
- * before reading from the device. snd_pcm_readi() blocks until that many
- * frames are ready.
- */
-static constexpr size_t read_buffer_size = 4096;
-
-class AlsaInputStream final : MultiSocketMonitor, DeferredMonitor {
-	InputStream base;
-	snd_pcm_t *capture_handle;
-	size_t frame_size;
-	int frames_to_read;
-	bool eof;
-
-	/**
-	 * Is somebody waiting for data?  This is set by method
-	 * Available().
-	 */
-	std::atomic_bool waiting;
-
-	ReusableArray<pollfd> pfd_buffer;
-
-public:
-	AlsaInputStream(EventLoop &loop,
-			const char *uri, Mutex &mutex, Cond &cond,
-			snd_pcm_t *_handle, int _frame_size)
-		:MultiSocketMonitor(loop),
-		 DeferredMonitor(loop),
-		 base(input_plugin_alsa, uri, mutex, cond),
-		 capture_handle(_handle),
-		 frame_size(_frame_size),
-		 eof(false)
-	{
-		assert(uri != nullptr);
-		assert(_handle != nullptr);
-
-		/* this mime type forces use of the PcmDecoderPlugin.
-		   Needs to be generalised when/if that decoder is
-		   updated to support other audio formats */
-		base.mime = "audio/x-mpd-cdda-pcm";
-		base.seekable = false;
-		base.size = -1;
-		base.ready = true;
-		frames_to_read = read_buffer_size / frame_size;
-
-		snd_pcm_start(capture_handle);
-
-		DeferredMonitor::Schedule();
-	}
-
-	~AlsaInputStream() {
-		snd_pcm_close(capture_handle);
-	}
-
-	using DeferredMonitor::GetEventLoop;
-
-	static InputStream *Create(const char *uri, Mutex &mutex, Cond &cond,
-				   Error &error);
-
-#if GCC_CHECK_VERSION(4,6) || defined(__clang__)
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Winvalid-offsetof"
-#endif
-
-	static constexpr AlsaInputStream *Cast(InputStream *is) {
-		return ContainerCast(is, AlsaInputStream, base);
-	}
-
-#if GCC_CHECK_VERSION(4,6) || defined(__clang__)
-#pragma GCC diagnostic pop
-#endif
-
-	bool Available() {
-		if (snd_pcm_avail(capture_handle) > frames_to_read)
-			return true;
-
-		if (!waiting.exchange(true))
-			SafeInvalidateSockets();
-
-		return false;
-	}
-
-	size_t Read(void *ptr, size_t size, Error &error);
-
-	bool IsEOF() {
-		return eof;
-	}
-
-private:
-	static snd_pcm_t *OpenDevice(const char *device, int rate,
-				     snd_pcm_format_t format, int channels,
-				     Error &error);
-
-	int Recover(int err);
-
-	void SafeInvalidateSockets() {
-		DeferredMonitor::Schedule();
-	}
-
-	virtual void RunDeferred() override {
-		InvalidateSockets();
-	}
-
-	virtual int PrepareSockets() override;
-	virtual void DispatchSockets() override;
-};
-
-inline InputStream *
-AlsaInputStream::Create(const char *uri, Mutex &mutex, Cond &cond,
-			Error &error)
-{
-	const char *const scheme = "alsa://";
-	if (!StringStartsWith(uri, scheme))
-		return nullptr;
-
-	const char *device = uri + strlen(scheme);
-	if (strlen(device) == 0)
-		device = default_device;
-
-	/* placeholders - eventually user-requested audio format will
-	   be passed via the URI. For now we just force the
-	   defaults */
-	int rate = default_rate;
-	snd_pcm_format_t format = default_format;
-	int channels = default_channels;
-
-	snd_pcm_t *handle = OpenDevice(device, rate, format, channels,
-				       error);
-	if (handle == nullptr)
-		return nullptr;
-
-	int frame_size = snd_pcm_format_width(format) / 8 * channels;
-	AlsaInputStream *stream = new AlsaInputStream(io_thread_get(),
-						      uri, mutex, cond,
-						      handle, frame_size);
-	return &stream->base;
-}
-
-inline size_t
-AlsaInputStream::Read(void *ptr, size_t size, Error &error)
-{
-	assert(ptr != nullptr);
-
-	int num_frames = size / frame_size;
-	int ret;
-	while ((ret = snd_pcm_readi(capture_handle, ptr, num_frames)) < 0) {
-		if (Recover(ret) < 0) {
-			eof = true;
-			error.Format(alsa_input_domain,
-				     "PCM error - stream aborted");
-			return 0;
-		}
-	}
-
-	size_t nbytes = ret * frame_size;
-	base.offset += nbytes;
-	return nbytes;
-}
-
-int
-AlsaInputStream::PrepareSockets()
-{
-	if (!waiting) {
-		ClearSocketList();
-		return -1;
-	}
-
-	int count = snd_pcm_poll_descriptors_count(capture_handle);
-	if (count < 0) {
-		ClearSocketList();
-		return -1;
-	}
-
-	struct pollfd *pfds = pfd_buffer.Get(count);
-
-	count = snd_pcm_poll_descriptors(capture_handle, pfds, count);
-	if (count < 0)
-		count = 0;
-
-	ReplaceSocketList(pfds, count);
-	return -1;
-}
-
-void
-AlsaInputStream::DispatchSockets()
-{
-	waiting = false;
-
-	const ScopeLock protect(base.mutex);
-	/* wake up the thread that is waiting for more data */
-	base.cond.broadcast();
-}
-
-inline int
-AlsaInputStream::Recover(int err)
-{
-	switch(err) {
-	case -EPIPE:
-		LogDebug(alsa_input_domain, "Buffer Overrun");
-		// drop through
-	case -ESTRPIPE:
-	case -EINTR:
-		err = snd_pcm_recover(capture_handle, err, 1);
-		break;
-	default:
-		// something broken somewhere, give up
-		err = -1;
-	}
-	return err;
-}
-
-inline snd_pcm_t *
-AlsaInputStream::OpenDevice(const char *device,
-			    int rate, snd_pcm_format_t format, int channels,
-			    Error &error)
-{
-	snd_pcm_t *capture_handle;
-	int err;
-	if ((err = snd_pcm_open(&capture_handle, device,
-				SND_PCM_STREAM_CAPTURE, 0)) < 0) {
-		error.Format(alsa_input_domain, "Failed to open device: %s (%s)", device, snd_strerror(err));
-		return nullptr;
-	}
-
-	snd_pcm_hw_params_t *hw_params;
-	if ((err = snd_pcm_hw_params_malloc(&hw_params)) < 0) {
-		error.Format(alsa_input_domain, "Cannot allocate hardware parameter structure (%s)", snd_strerror(err));
-		snd_pcm_close(capture_handle);
-		return nullptr;
-	}
-
-	if ((err = snd_pcm_hw_params_any(capture_handle, hw_params)) < 0) {
-		error.Format(alsa_input_domain, "Cannot initialize hardware parameter structure (%s)", snd_strerror(err));
-		snd_pcm_hw_params_free(hw_params);
-		snd_pcm_close(capture_handle);
-		return nullptr;
-	}
-
-	if ((err = snd_pcm_hw_params_set_access(capture_handle, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
-		error.Format(alsa_input_domain, "Cannot set access type (%s)", snd_strerror (err));
-		snd_pcm_hw_params_free(hw_params);
-		snd_pcm_close(capture_handle);
-		return nullptr;
-	}
-
-	if ((err = snd_pcm_hw_params_set_format(capture_handle, hw_params, format)) < 0) {
-		snd_pcm_hw_params_free(hw_params);
-		snd_pcm_close(capture_handle);
-		error.Format(alsa_input_domain, "Cannot set sample format (%s)", snd_strerror (err));
-		return nullptr;
-	}
-
-	if ((err = snd_pcm_hw_params_set_channels(capture_handle, hw_params, channels)) < 0) {
-		snd_pcm_hw_params_free(hw_params);
-		snd_pcm_close(capture_handle);
-		error.Format(alsa_input_domain, "Cannot set channels (%s)", snd_strerror (err));
-		return nullptr;
-	}
-
-	if ((err = snd_pcm_hw_params_set_rate(capture_handle, hw_params, rate, 0)) < 0) {
-		snd_pcm_hw_params_free(hw_params);
-		snd_pcm_close(capture_handle);
-		error.Format(alsa_input_domain, "Cannot set sample rate (%s)", snd_strerror (err));
-		return nullptr;
-	}
-
-	/* period needs to be big enough so that poll() doesn't fire too often,
-	 * but small enough that buffer overruns don't occur if Read() is not
-	 * invoked often enough.
-	 * the calculation here is empirical; however all measurements were
-	 * done using 44100:16:2. When we extend this plugin to support
-	 * other audio formats then this may need to be revisited */
-	snd_pcm_uframes_t period = read_buffer_size * 2;
-	int direction = -1;
-	if ((err = snd_pcm_hw_params_set_period_size_near(capture_handle, hw_params,
-							  &period, &direction)) < 0) {
-		error.Format(alsa_input_domain, "Cannot set period size (%s)",
-			     snd_strerror(err));
-		snd_pcm_hw_params_free(hw_params);
-		snd_pcm_close(capture_handle);
-		return nullptr;
-	}
-
-	if ((err = snd_pcm_hw_params(capture_handle, hw_params)) < 0) {
-		error.Format(alsa_input_domain, "Cannot set parameters (%s)",
-			     snd_strerror(err));
-		snd_pcm_hw_params_free(hw_params);
-		snd_pcm_close(capture_handle);
-		return nullptr;
-	}
-
-	snd_pcm_hw_params_free (hw_params);
-
-	snd_pcm_sw_params_t *sw_params;
-
-	snd_pcm_sw_params_malloc(&sw_params);
-	snd_pcm_sw_params_current(capture_handle, sw_params);
-
-	if ((err = snd_pcm_sw_params_set_start_threshold(capture_handle, sw_params,
-							 period)) < 0)  {
-		error.Format(alsa_input_domain,
-			     "unable to set start threshold (%s)", snd_strerror(err));
-		snd_pcm_sw_params_free(sw_params);
-		snd_pcm_close(capture_handle);
-		return nullptr;
-	}
-
-	if ((err = snd_pcm_sw_params(capture_handle, sw_params)) < 0) {
-		error.Format(alsa_input_domain,
-			     "unable to install sw params (%s)", snd_strerror(err));
-		snd_pcm_sw_params_free(sw_params);
-		snd_pcm_close(capture_handle);
-		return nullptr;
-	}
-
-	snd_pcm_sw_params_free(sw_params);
-
-	snd_pcm_prepare(capture_handle);
-
-	return capture_handle;
-}
-
-/*#########################  Plugin Functions  ##############################*/
-
-static InputStream *
-alsa_input_open(const char *uri, Mutex &mutex, Cond &cond, Error &error)
-{
-	return AlsaInputStream::Create(uri, mutex, cond, error);
-}
-
-static void
-alsa_input_close(InputStream *is)
-{
-	AlsaInputStream *ais = AlsaInputStream::Cast(is);
-	delete ais;
-}
-
-static bool
-alsa_input_available(InputStream *is)
-{
-	AlsaInputStream *ais = AlsaInputStream::Cast(is);
-	return ais->Available();
-}
-
-static size_t
-alsa_input_read(InputStream *is, void *ptr, size_t size, Error &error)
-{
-	AlsaInputStream *ais = AlsaInputStream::Cast(is);
-	return ais->Read(ptr, size, error);
-}
-
-static bool
-alsa_input_eof(gcc_unused InputStream *is)
-{
-	AlsaInputStream *ais = AlsaInputStream::Cast(is);
-	return ais->IsEOF();
-}
-
-const struct InputPlugin input_plugin_alsa = {
-	"alsa",
-	nullptr,
-	nullptr,
-	alsa_input_open,
-	alsa_input_close,
-	nullptr,
-	nullptr,
-	nullptr,
-	alsa_input_available,
-	alsa_input_read,
-	alsa_input_eof,
-	nullptr,
-};