rollback to 3428, before the mysterious removal of libs/* at 3431/3432

git-svn-id: svn://localhost/ardour2/branches/3.0@3435 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 277 insertions, 0 deletions

diff --git a/libs/ardour/ardour/audio_diskstream.h b/libs/ardour/ardour/audio_diskstream.h
new file mode 100644
index 0000000000..aaf5461361
--- /dev/null
+++ b/libs/ardour/ardour/audio_diskstream.h
@@ -0,0 +1,277 @@
+/*
+    Copyright (C) 2000-2006 Paul Davis 
+
+    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., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#ifndef __ardour_audio_diskstream_h__
+#define __ardour_audio_diskstream_h__
+
+#include <sigc++/signal.h>
+
+#include <cmath>
+#include <string>
+#include <queue>
+#include <map>
+#include <vector>
+
+#include <time.h>
+
+#include <pbd/fastlog.h>
+#include <pbd/ringbufferNPT.h>
+#include <pbd/stateful.h> 
+#include <pbd/rcu.h> 
+
+#include <ardour/ardour.h>
+#include <ardour/configuration.h>
+#include <ardour/session.h>
+#include <ardour/route_group.h>
+#include <ardour/route.h>
+#include <ardour/port.h>
+#include <ardour/utils.h>
+#include <ardour/diskstream.h>
+#include <ardour/audioplaylist.h>
+
+struct tm;
+
+namespace ARDOUR {
+
+class AudioEngine;
+class Send;
+class Session;
+class AudioPlaylist;
+class AudioFileSource;
+class IO;
+
+class AudioDiskstream : public Diskstream
+{	
+  public:
+	AudioDiskstream (Session &, const string& name, Diskstream::Flag f = Recordable);
+	AudioDiskstream (Session &, const XMLNode&);
+	~AudioDiskstream();
+
+	float playback_buffer_load() const;
+	float capture_buffer_load() const;
+
+	string input_source (uint32_t n=0) const {
+		boost::shared_ptr<ChannelList> c = channels.reader();
+		if (n < c->size()) {
+			return (*c)[n]->source ? (*c)[n]->source->name() : "";
+		} else {
+			return ""; 
+		}
+	}
+
+	Port *input_source_port (uint32_t n=0) const { 
+		boost::shared_ptr<ChannelList> c = channels.reader();
+		if (n < c->size()) return (*c)[n]->source; return 0; 
+	}
+
+	void set_record_enabled (bool yn);
+	int set_destructive (bool yn);
+	bool can_become_destructive (bool& requires_bounce) const;
+
+	float peak_power(uint32_t n = 0) { 
+		boost::shared_ptr<ChannelList> c = channels.reader();
+		ChannelInfo* chaninfo = (*c)[n];
+		float x = chaninfo->peak_power;
+		chaninfo->peak_power = 0.0f;
+		if (x > 0.0f) {
+			return 20.0f * fast_log10(x);
+		} else {
+			return minus_infinity();
+		}
+	}
+	
+	boost::shared_ptr<AudioPlaylist> audio_playlist () { return boost::dynamic_pointer_cast<AudioPlaylist>(_playlist); }
+
+	int use_playlist (boost::shared_ptr<Playlist>);
+	int use_new_playlist ();
+	int use_copy_playlist ();
+
+	Sample *playback_buffer (uint32_t n = 0) {
+		boost::shared_ptr<ChannelList> c = channels.reader();
+		if (n < c->size())
+			return (*c)[n]->current_playback_buffer;
+		return 0;
+	}
+	
+	Sample *capture_buffer (uint32_t n = 0) {
+		boost::shared_ptr<ChannelList> c = channels.reader();
+		if (n < c->size())
+			return (*c)[n]->current_capture_buffer;
+		return 0;
+	}
+
+	boost::shared_ptr<AudioFileSource> write_source (uint32_t n=0) {
+		boost::shared_ptr<ChannelList> c = channels.reader();
+		if (n < c->size())
+			return (*c)[n]->write_source;
+		return boost::shared_ptr<AudioFileSource>();
+	}
+
+	int add_channel (uint32_t how_many);
+	int remove_channel (uint32_t how_many);
+	
+	/* stateful */
+
+	XMLNode& get_state(void);
+	int      set_state(const XMLNode& node);
+
+	void monitor_input (bool);
+
+	static void swap_by_ptr (Sample *first, Sample *last) {
+		while (first < last) {
+			Sample tmp = *first;
+			*first++ = *last;
+			*last-- = tmp;
+		}
+	}
+
+	static void swap_by_ptr (Sample *first, Sample *last, nframes_t n) {
+		while (n--) {
+			Sample tmp = *first;
+			*first++ = *last;
+			*last-- = tmp;
+		}
+	}
+
+	XMLNode* deprecated_io_node;
+
+  protected:
+	friend class Session;
+
+	/* the Session is the only point of access for these
+	   because they require that the Session is "inactive"
+	   while they are called.
+	*/
+
+	void set_pending_overwrite(bool);
+	int  overwrite_existing_buffers ();
+	void set_block_size (nframes_t);
+	int  internal_playback_seek (nframes_t distance);
+	int  can_internal_playback_seek (nframes_t distance);
+	int  rename_write_sources ();
+	void reset_write_sources (bool, bool force = false);
+	void non_realtime_input_change ();
+
+  protected:
+	friend class Auditioner;
+	int  seek (nframes_t which_sample, bool complete_refill = false);
+
+  protected:
+	friend class AudioTrack;
+
+	int  process (nframes_t transport_frame, nframes_t nframes, nframes_t offset, bool can_record, bool rec_monitors_input);
+	bool commit  (nframes_t nframes);
+
+  private:
+
+	struct ChannelInfo {
+	    
+	    ChannelInfo (nframes_t buffer_size, nframes_t speed_buffer_size, nframes_t wrap_buffer_size);
+	    ~ChannelInfo ();
+
+	    Sample     *playback_wrap_buffer;
+	    Sample     *capture_wrap_buffer;
+	    Sample     *speed_buffer;
+	    
+	    float       peak_power;
+	    
+	    boost::shared_ptr<AudioFileSource> fades_source;
+	    boost::shared_ptr<AudioFileSource> write_source;
+
+	    /// the Port that our audio data comes from
+	    Port         *source;
+	    Sample       *current_capture_buffer;
+	    Sample       *current_playback_buffer;
+	    
+	    RingBufferNPT<Sample> *playback_buf;
+	    RingBufferNPT<Sample> *capture_buf;
+	    
+	    Sample* scrub_buffer;
+	    Sample* scrub_forward_buffer;
+	    Sample* scrub_reverse_buffer;
+	    
+	    RingBufferNPT<Sample>::rw_vector playback_vector;
+	    RingBufferNPT<Sample>::rw_vector capture_vector;
+	    
+	    RingBufferNPT<CaptureTransition> * capture_transition_buf;
+	    // the following are used in the butler thread only
+	    nframes_t                     curr_capture_cnt;
+	};
+
+	typedef std::vector<ChannelInfo*> ChannelList;
+
+	/* The two central butler operations */
+	int do_flush (Session::RunContext context, bool force = false);
+	int do_refill () { return _do_refill(_mixdown_buffer, _gain_buffer); }
+	
+	int do_refill_with_alloc ();
+
+	int read (Sample* buf, Sample* mixdown_buffer, float* gain_buffer,
+		  nframes_t& start, nframes_t cnt, 
+		  ChannelInfo* channel_info, int channel, bool reversed);
+
+	void finish_capture (bool rec_monitors_input, boost::shared_ptr<ChannelList>);
+	void transport_stopped (struct tm&, time_t, bool abort);
+	void transport_looped (nframes_t transport_frame);
+
+	void init (Diskstream::Flag);
+
+	void init_channel (ChannelInfo &chan);
+	void destroy_channel (ChannelInfo &chan);
+	
+	int use_new_write_source (uint32_t n=0);
+
+	int find_and_use_playlist (const string&);
+
+	void allocate_temporary_buffers ();
+
+	int use_pending_capture_data (XMLNode& node);
+
+	void get_input_sources ();
+	void check_record_status (nframes_t transport_frame, nframes_t nframes, bool can_record);
+	void set_align_style_from_io();
+	void setup_destructive_playlist ();
+	void use_destructive_playlist ();
+
+	void engage_record_enable ();
+	void disengage_record_enable ();
+
+	// Working buffers for do_refill (butler thread)
+	static void allocate_working_buffers();
+	static void free_working_buffers();
+
+	static size_t  _working_buffers_size;
+	static Sample* _mixdown_buffer;
+	static gain_t* _gain_buffer;
+
+	std::vector<boost::shared_ptr<AudioFileSource> > capturing_sources;
+	
+	SerializedRCUManager<ChannelList> channels;
+	
+ /* really */
+  private:
+	int _do_refill (Sample *mixdown_buffer, float *gain_buffer);
+
+	int add_channel_to (boost::shared_ptr<ChannelList>, uint32_t how_many);
+	int remove_channel_from (boost::shared_ptr<ChannelList>, uint32_t how_many);
+
+};
+
+} // namespace ARDOUR
+
+#endif /* __ardour_audio_diskstream_h__ */