X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fardour%2Faudiosource.cc;h=6200b35d148cfcfd6277df946eada7d112308a92;hb=32b73439275dbe2cccaa2a71026a951ea46d24b9;hp=b8366e0ac038a70e1d92e8fed326b57ed7a93cde;hpb=4e1f451520975868659f4c00d00883f5f1cd5805;p=ardour.git diff --git a/libs/ardour/audiosource.cc b/libs/ardour/audiosource.cc index b8366e0ac0..6200b35d14 100644 --- a/libs/ardour/audiosource.cc +++ b/libs/ardour/audiosource.cc @@ -1,5 +1,5 @@ /* - Copyright (C) 2000 Paul Davis + Copyright (C) 2000 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 @@ -17,70 +17,96 @@ */ -#include +#ifdef COMPILER_MSVC +#include +#else #include +#include +#endif +#include #include -#include #include -#include #include #include #include #include -#include #include #include +#ifdef PLATFORM_WINDOWS +#include + +#else +#include + +#endif + +#include +#include "pbd/gstdio_compat.h" + +#include + #include #include -#include -#include +#include "pbd/file_utils.h" +#include "pbd/scoped_file_descriptor.h" +#include "pbd/xml++.h" + +#include "ardour/audiosource.h" +#include "ardour/rc_configuration.h" +#include "ardour/runtime_functions.h" +#include "ardour/session.h" -#include -#include -#include -#include +#include "pbd/i18n.h" -#include "i18n.h" +#include "ardour/debug.h" using namespace std; using namespace ARDOUR; using namespace PBD; -using Glib::ustring; +Glib::Threads::Mutex AudioSource::_level_buffer_lock; +vector > AudioSource::_mixdown_buffers; +vector > AudioSource::_gain_buffers; bool AudioSource::_build_missing_peakfiles = false; + +/** true if we want peakfiles (e.g. if we are displaying a GUI) */ bool AudioSource::_build_peakfiles = false; #define _FPP 256 -AudioSource::AudioSource (Session& s, ustring name) - : Source (s, name, DataType::AUDIO) +AudioSource::AudioSource (Session& s, const string& name) + : Source (s, DataType::AUDIO, name) + , _length (0) + , _peak_byte_max (0) + , _peaks_built (false) + , _peakfile_fd (-1) + , peak_leftover_cnt (0) + , peak_leftover_size (0) + , peak_leftovers (0) + , _first_run (true) + , _last_scale (0.0) + , _last_map_off (0) + , _last_raw_map_length (0) { - _peaks_built = false; - _peak_byte_max = 0; - peakfile = -1; - _read_data_count = 0; - _write_data_count = 0; - peak_leftover_cnt = 0; - peak_leftover_size = 0; - peak_leftovers = 0; } -AudioSource::AudioSource (Session& s, const XMLNode& node) +AudioSource::AudioSource (Session& s, const XMLNode& node) : Source (s, node) + , _length (0) + , _peak_byte_max (0) + , _peaks_built (false) + , _peakfile_fd (-1) + , peak_leftover_cnt (0) + , peak_leftover_size (0) + , peak_leftovers (0) + , _first_run (true) + , _last_scale (0.0) + , _last_map_off (0) + , _last_raw_map_length (0) { - - _peaks_built = false; - _peak_byte_max = 0; - peakfile = -1; - _read_data_count = 0; - _write_data_count = 0; - peak_leftover_cnt = 0; - peak_leftover_size = 0; - peak_leftovers = 0; - - if (set_state (node)) { + if (set_state (node, Stateful::loading_state_version)) { throw failed_constructor(); } } @@ -88,13 +114,14 @@ AudioSource::AudioSource (Session& s, const XMLNode& node) AudioSource::~AudioSource () { /* shouldn't happen but make sure we don't leak file descriptors anyway */ - + if (peak_leftover_cnt) { cerr << "AudioSource destroyed with leftover peak data pending" << endl; } - if (peakfile >= 0) { - ::close (peakfile); + if ((-1) != _peakfile_fd) { + close (_peakfile_fd); + _peakfile_fd = -1; } delete [] peak_leftovers; @@ -106,42 +133,62 @@ AudioSource::get_state () XMLNode& node (Source::get_state()); if (_captured_for.length()) { - node.add_property ("captured-for", _captured_for); + node.set_property ("captured-for", _captured_for); } return node; } int -AudioSource::set_state (const XMLNode& node) +AudioSource::set_state (const XMLNode& node, int /*version*/) { - const XMLProperty* prop; + node.get_property ("captured-for", _captured_for); + return 0; +} - Source::set_state (node); +bool +AudioSource::empty () const +{ + return _length == 0; +} - if ((prop = node.property ("captured-for")) != 0) { - _captured_for = prop->value(); - } +samplecnt_t +AudioSource::length (samplepos_t /*pos*/) const +{ + return _length; +} - return 0; +void +AudioSource::update_length (samplecnt_t len) +{ + if (len > _length) { + _length = len; + } } + /*********************************************************************** PEAK FILE STUFF ***********************************************************************/ +/** Checks to see if peaks are ready. If so, we return true. If not, we return false, and + * things are set up so that doThisWhenReady is called when the peaks are ready. + * A new PBD::ScopedConnection is created for the associated connection and written to + * *connect_here_if_not. + * + * @param doThisWhenReady Function to call when peaks are ready (if they are not already). + * @param connect_here_if_not Address to write new ScopedConnection to. + * @param event_loop Event loop for doThisWhenReady to be called in. + */ bool -AudioSource::peaks_ready (sigc::slot the_slot, sigc::connection& conn) const +AudioSource::peaks_ready (boost::function doThisWhenReady, ScopedConnection** connect_here_if_not, EventLoop* event_loop) const { bool ret; - Glib::Mutex::Lock lm (_peaks_ready_lock); - - /* check to see if the peak data is ready. if not - connect the slot while still holding the lock. - */ + Glib::Threads::Mutex::Lock lm (_peaks_ready_lock); if (!(ret = _peaks_built)) { - conn = PeaksReady.connect (the_slot); + *connect_here_if_not = new ScopedConnection; + PeaksReady.connect (**connect_here_if_not, MISSING_INVALIDATOR, doThisWhenReady, event_loop); } return ret; @@ -150,79 +197,93 @@ AudioSource::peaks_ready (sigc::slot the_slot, sigc::connection& conn) con void AudioSource::touch_peakfile () { - struct stat statbuf; + GStatBuf statbuf; - if (stat (peakpath.c_str(), &statbuf) != 0 || statbuf.st_size == 0) { + if (g_stat (_peakpath.c_str(), &statbuf) != 0 || statbuf.st_size == 0) { return; } - + struct utimbuf tbuf; - + tbuf.actime = statbuf.st_atime; - tbuf.modtime = time ((time_t) 0); - - utime (peakpath.c_str(), &tbuf); + tbuf.modtime = time ((time_t*) 0); + + g_utime (_peakpath.c_str(), &tbuf); } int -AudioSource::rename_peakfile (ustring newpath) +AudioSource::rename_peakfile (string newpath) { /* caller must hold _lock */ - ustring oldpath = peakpath; + string oldpath = _peakpath; - if (access (oldpath.c_str(), F_OK) == 0) { - if (rename (oldpath.c_str(), newpath.c_str()) != 0) { + if (Glib::file_test (oldpath, Glib::FILE_TEST_EXISTS)) { + if (g_rename (oldpath.c_str(), newpath.c_str()) != 0) { error << string_compose (_("cannot rename peakfile for %1 from %2 to %3 (%4)"), _name, oldpath, newpath, strerror (errno)) << endmsg; return -1; } } - peakpath = newpath; + _peakpath = newpath; return 0; } int -AudioSource::initialize_peakfile (bool newfile, ustring audio_path) +AudioSource::initialize_peakfile (const string& audio_path, const bool in_session) { - struct stat statbuf; - - peakpath = peak_path (audio_path); - - /* if the peak file should be there, but isn't .... */ - - if (!newfile && !Glib::file_test (peakpath.c_str(), Glib::FILE_TEST_EXISTS)) { - peakpath = find_broken_peakfile (peakpath, audio_path); + Glib::Threads::Mutex::Lock lm (_initialize_peaks_lock); + GStatBuf statbuf; + + _peakpath = construct_peak_filepath (audio_path, in_session); + + if (!empty() && !Glib::file_test (_peakpath.c_str(), Glib::FILE_TEST_EXISTS)) { + string oldpeak = construct_peak_filepath (audio_path, in_session, true); + DEBUG_TRACE(DEBUG::Peaks, string_compose ("Looking for old peak file %1 for Audio file %2\n", oldpeak, audio_path)); + if (Glib::file_test (oldpeak.c_str(), Glib::FILE_TEST_EXISTS)) { + // TODO use hard-link if possible + DEBUG_TRACE(DEBUG::Peaks, string_compose ("Copy old peakfile %1 to %2\n", oldpeak, _peakpath)); + PBD::copy_file (oldpeak, _peakpath); + } } - if (stat (peakpath.c_str(), &statbuf)) { + DEBUG_TRACE(DEBUG::Peaks, string_compose ("Initialize Peakfile %1 for Audio file %2\n", _peakpath, audio_path)); + + if (g_stat (_peakpath.c_str(), &statbuf)) { if (errno != ENOENT) { /* it exists in the peaks dir, but there is some kind of error */ - - error << string_compose(_("AudioSource: cannot stat peakfile \"%1\""), peakpath) << endmsg; + + error << string_compose(_("AudioSource: cannot stat peakfile \"%1\""), _peakpath) << endmsg; return -1; } - /* peakfile does not exist */ - + DEBUG_TRACE(DEBUG::Peaks, string_compose("Peakfile %1 does not exist\n", _peakpath)); + _peaks_built = false; - + } else { - + /* we found it in the peaks dir, so check it out */ - - if (statbuf.st_size == 0 || ((nframes_t) statbuf.st_size < ((length() / _FPP) * sizeof (PeakData)))) { - // empty + + if (statbuf.st_size == 0 || (statbuf.st_size < (off_t) ((length(_timeline_position) / _FPP) * sizeof (PeakData)))) { + DEBUG_TRACE(DEBUG::Peaks, string_compose("Peakfile %1 is empty\n", _peakpath)); _peaks_built = false; } else { // Check if the audio file has changed since the peakfile was built. - struct stat stat_file; - int err = stat (audio_path.c_str(), &stat_file); - + GStatBuf stat_file; + int err = g_stat (audio_path.c_str(), &stat_file); + if (err) { - _peaks_built = false; - _peak_byte_max = 0; + + /* no audio path - nested source or we can't + read it or ... whatever, use the peakfile as-is. + */ + DEBUG_TRACE(DEBUG::Peaks, string_compose("Error when calling stat on Peakfile %1\n", _peakpath)); + + _peaks_built = true; + _peak_byte_max = statbuf.st_size; + } else { /* allow 6 seconds slop on checking peak vs. file times because of various @@ -240,176 +301,243 @@ AudioSource::initialize_peakfile (bool newfile, ustring audio_path) } } - if (!newfile && !_peaks_built && _build_missing_peakfiles && _build_peakfiles) { + if (!empty() && !_peaks_built && _build_missing_peakfiles && _build_peakfiles) { build_peaks_from_scratch (); - } - + } + return 0; } -nframes_t -AudioSource::read (Sample *dst, nframes_t start, nframes_t cnt) const +samplecnt_t +AudioSource::read (Sample *dst, samplepos_t start, samplecnt_t cnt, int /*channel*/) const { - Glib::Mutex::Lock lm (_lock); + assert (cnt >= 0); + + Glib::Threads::Mutex::Lock lm (_lock); return read_unlocked (dst, start, cnt); } -nframes_t -AudioSource::write (Sample *dst, nframes_t cnt) +samplecnt_t +AudioSource::write (Sample *dst, samplecnt_t cnt) { - Glib::Mutex::Lock lm (_lock); + Glib::Threads::Mutex::Lock lm (_lock); + /* any write makes the file not removable */ + _flags = Flag (_flags & ~Removable); return write_unlocked (dst, cnt); } int -AudioSource::read_peaks (PeakData *peaks, nframes_t npeaks, nframes_t start, nframes_t cnt, double samples_per_visual_peak) const +AudioSource::read_peaks (PeakData *peaks, samplecnt_t npeaks, samplepos_t start, samplecnt_t cnt, double samples_per_visual_peak) const { return read_peaks_with_fpp (peaks, npeaks, start, cnt, samples_per_visual_peak, _FPP); } -int -AudioSource::read_peaks_with_fpp (PeakData *peaks, nframes_t npeaks, nframes_t start, nframes_t cnt, - double samples_per_visual_peak, nframes_t samples_per_file_peak) const +/** @param peaks Buffer to write peak data. + * @param npeaks Number of peaks to write. + */ + +int +AudioSource::read_peaks_with_fpp (PeakData *peaks, samplecnt_t npeaks, samplepos_t start, samplecnt_t cnt, + double samples_per_visual_peak, samplecnt_t samples_per_file_peak) const { - Glib::Mutex::Lock lm (_lock); + Glib::Threads::Mutex::Lock lm (_lock); double scale; double expected_peaks; PeakData::PeakDatum xmax; PeakData::PeakDatum xmin; int32_t to_read; - uint32_t nread; - nframes_t zero_fill = 0; - int ret = -1; - PeakData* staging = 0; - Sample* raw_staging = 0; - int _peakfile = -1; +#ifdef PLATFORM_WINDOWS + SYSTEM_INFO system_info; + GetSystemInfo (&system_info); + const int bufsize = system_info.dwAllocationGranularity;; +#else + const int bufsize = sysconf(_SC_PAGESIZE); +#endif + samplecnt_t read_npeaks = npeaks; + samplecnt_t zero_fill = 0; + + GStatBuf statbuf; expected_peaks = (cnt / (double) samples_per_file_peak); + if (g_stat (_peakpath.c_str(), &statbuf) != 0) { + error << string_compose (_("Cannot open peakfile @ %1 for size check (%2)"), _peakpath, strerror (errno)) << endmsg; + return -1; + } + + if (!_captured_for.empty()) { + + /* _captured_for is only set after a capture pass is + * complete. so we know that capturing is finished for this + * file, and now we can check actual size of the peakfile is at + * least large enough for all the data in the audio file. if it + * is too short, assume that a crash or other error truncated + * it, and rebuild it from scratch. + * + * XXX this may not work for destructive recording, but we + * might decided to get rid of that anyway. + * + */ + + const off_t expected_file_size = (_length / (double) samples_per_file_peak) * sizeof (PeakData); + + if (statbuf.st_size < expected_file_size) { + warning << string_compose (_("peak file %1 is truncated from %2 to %3"), _peakpath, expected_file_size, statbuf.st_size) << endmsg; + lm.release(); // build_peaks_from_scratch() takes _lock + const_cast(this)->build_peaks_from_scratch (); + lm.acquire (); + if (g_stat (_peakpath.c_str(), &statbuf) != 0) { + error << string_compose (_("Cannot open peakfile @ %1 for size check (%2) after rebuild"), _peakpath, strerror (errno)) << endmsg; + } + if (statbuf.st_size < expected_file_size) { + fatal << "peak file is still truncated after rebuild" << endmsg; + /*NOTREACHED*/ + } + } + } + + ScopedFileDescriptor sfd (g_open (_peakpath.c_str(), O_RDONLY, 0444)); + + if (sfd < 0) { + error << string_compose (_("Cannot open peakfile @ %1 for reading (%2)"), _peakpath, strerror (errno)) << endmsg; + return -1; + } + scale = npeaks/expected_peaks; -#undef DEBUG_READ_PEAKS -#ifdef DEBUG_READ_PEAKS - cerr << "======>RP: npeaks = " << npeaks - << " start = " << start - << " cnt = " << cnt - << " len = " << _length - << " samples_per_visual_peak =" << samples_per_visual_peak - << " expected was " << expected_peaks << " ... scale = " << scale - << " PD ptr = " << peaks - <RP: npeaks = %1 start = %2 cnt = %3 len = %4 samples_per_visual_peak = %5 expected was %6 ... scale = %7 PD ptr = %8\n" + , npeaks, start, cnt, _length, samples_per_visual_peak, expected_peaks, scale, peaks)); /* fix for near-end-of-file conditions */ - if (cnt > _length - start) { - // cerr << "too close to end @ " << _length << " given " << start << " + " << cnt << endl; - cnt = _length - start; - nframes_t old = npeaks; - npeaks = min ((nframes_t) floor (cnt / samples_per_visual_peak), npeaks); - zero_fill = old - npeaks; + if (cnt + start > _length) { + // cerr << "too close to end @ " << _length << " given " << start << " + " << cnt << " (" << _length - start << ")" << endl; + cnt = std::max ((samplecnt_t)0, _length - start); + read_npeaks = min ((samplecnt_t) floor (cnt / samples_per_visual_peak), npeaks); + zero_fill = npeaks - read_npeaks; + expected_peaks = (cnt / (double) samples_per_file_peak); + scale = npeaks/expected_peaks; } - // cerr << "actual npeaks = " << npeaks << " zf = " << zero_fill << endl; - + assert (cnt >= 0); + + // cerr << "actual npeaks = " << read_npeaks << " zf = " << zero_fill << endl; + if (npeaks == cnt) { -#ifdef DEBUG_READ_PEAKS - cerr << "RAW DATA\n"; -#endif + DEBUG_TRACE (DEBUG::Peaks, "RAW DATA\n"); + /* no scaling at all, just get the sample data and duplicate it for both max and min peak values. */ - Sample* raw_staging = new Sample[cnt]; - - if (read_unlocked (raw_staging, start, cnt) != cnt) { + boost::scoped_array raw_staging(new Sample[cnt]); + + if (read_unlocked (raw_staging.get(), start, cnt) != cnt) { error << _("cannot read sample data for unscaled peak computation") << endmsg; return -1; } - for (nframes_t i = 0; i < npeaks; ++i) { + for (samplecnt_t i = 0; i < npeaks; ++i) { peaks[i].max = raw_staging[i]; peaks[i].min = raw_staging[i]; } - delete [] raw_staging; return 0; } if (scale == 1.0) { - off_t first_peak_byte = (start / samples_per_file_peak) * sizeof (PeakData); - + size_t bytes_to_read = sizeof (PeakData) * read_npeaks; /* open, read, close */ - if ((_peakfile = ::open (peakpath.c_str(), O_RDONLY, 0664)) < 0) { - error << string_compose(_("AudioSource: cannot open peakpath (a) \"%1\" (%2)"), peakpath, strerror (errno)) << endmsg; - return -1; - } + DEBUG_TRACE (DEBUG::Peaks, "DIRECT PEAKS\n"); + + off_t map_off = first_peak_byte; + off_t read_map_off = map_off & ~(bufsize - 1); + off_t map_delta = map_off - read_map_off; + size_t map_length = bytes_to_read + map_delta; + + if (_first_run || (_last_scale != samples_per_visual_peak) || (_last_map_off != map_off) || (_last_raw_map_length < bytes_to_read)) { + peak_cache.reset (new PeakData[npeaks]); + char* addr; +#ifdef PLATFORM_WINDOWS + HANDLE file_handle = (HANDLE) _get_osfhandle(int(sfd)); + HANDLE map_handle; + LPVOID view_handle; + bool err_flag; + + map_handle = CreateFileMapping(file_handle, NULL, PAGE_READONLY, 0, 0, NULL); + if (map_handle == NULL) { + error << string_compose (_("map failed - could not create file mapping for peakfile %1."), _peakpath) << endmsg; + return -1; + } + + view_handle = MapViewOfFile(map_handle, FILE_MAP_READ, 0, read_map_off, map_length); + if (view_handle == NULL) { + error << string_compose (_("map failed - could not map peakfile %1."), _peakpath) << endmsg; + return -1; + } + + addr = (char*) view_handle; + + memcpy ((void*)peak_cache.get(), (void*)(addr + map_delta), bytes_to_read); -#ifdef DEBUG_READ_PEAKS - cerr << "DIRECT PEAKS\n"; + err_flag = UnmapViewOfFile (view_handle); + err_flag = CloseHandle(map_handle); + if(!err_flag) { + error << string_compose (_("unmap failed - could not unmap peakfile %1."), _peakpath) << endmsg; + return -1; + } +#else + addr = (char*) mmap (0, map_length, PROT_READ, MAP_PRIVATE, sfd, read_map_off); + if (addr == MAP_FAILED) { + error << string_compose (_("map failed - could not mmap peakfile %1."), _peakpath) << endmsg; + return -1; + } + + memcpy ((void*)peak_cache.get(), (void*)(addr + map_delta), bytes_to_read); + munmap (addr, map_length); #endif - - nread = ::pread (_peakfile, peaks, sizeof (PeakData)* npeaks, first_peak_byte); - close (_peakfile); - - if (nread != sizeof (PeakData) * npeaks) { - cerr << "AudioSource[" - << _name - << "]: cannot read peaks from peakfile! (read only " - << nread - << " not " - << npeaks - << "at sample " - << start - << " = byte " - << first_peak_byte - << ')' - << endl; - return -1; - } + if (zero_fill) { + memset (&peak_cache[read_npeaks], 0, sizeof (PeakData) * zero_fill); + } - if (zero_fill) { - memset (&peaks[npeaks], 0, sizeof (PeakData) * zero_fill); + _first_run = false; + _last_scale = samples_per_visual_peak; + _last_map_off = map_off; + _last_raw_map_length = bytes_to_read; } + memcpy ((void*)peaks, (void*)peak_cache.get(), npeaks * sizeof(PeakData)); + return 0; } - - nframes_t tnp; - if (scale < 1.0) { -#ifdef DEBUG_READ_PEAKS - cerr << "DOWNSAMPLE\n"; -#endif + DEBUG_TRACE (DEBUG::Peaks, "DOWNSAMPLE\n"); + /* the caller wants: - - more frames-per-peak (lower resolution) than the peakfile, or to put it another way, + - more samples-per-peak (lower resolution) than the peakfile, or to put it another way, - less peaks than the peakfile holds for the same range So, read a block into a staging area, and then downsample from there. - to avoid confusion, I'll refer to the requested peaks as visual_peaks and the peakfile peaks as stored_peaks + to avoid confusion, I'll refer to the requested peaks as visual_peaks and the peakfile peaks as stored_peaks */ - const uint32_t chunksize = (uint32_t) min (expected_peaks, 65536.0); - - staging = new PeakData[chunksize]; - - /* compute the rounded up frame position */ - - nframes_t current_frame = start; - nframes_t current_stored_peak = (nframes_t) ceil (current_frame / (double) samples_per_file_peak); - uint32_t next_visual_peak = (uint32_t) ceil (current_frame / samples_per_visual_peak); - double next_visual_peak_frame = next_visual_peak * samples_per_visual_peak; - uint32_t stored_peak_before_next_visual_peak = (nframes_t) next_visual_peak_frame / samples_per_file_peak; - uint32_t nvisual_peaks = 0; - uint32_t stored_peaks_read = 0; - uint32_t i = 0; + const samplecnt_t chunksize = (samplecnt_t) expected_peaks; // we read all the peaks we need in one hit. + + /* compute the rounded up sample position */ + + samplepos_t current_stored_peak = (samplepos_t) ceil (start / (double) samples_per_file_peak); + samplepos_t next_visual_peak = (samplepos_t) ceil (start / samples_per_visual_peak); + double next_visual_peak_sample = next_visual_peak * samples_per_visual_peak; + samplepos_t stored_peak_before_next_visual_peak = (samplepos_t) next_visual_peak_sample / samples_per_file_peak; + samplecnt_t nvisual_peaks = 0; + uint32_t i = 0; /* handle the case where the initial visual peak is on a pixel boundary */ @@ -417,135 +545,153 @@ AudioSource::read_peaks_with_fpp (PeakData *peaks, nframes_t npeaks, nframes_t s /* open ... close during out: handling */ - if ((_peakfile = ::open (peakpath.c_str(), O_RDONLY, 0664)) < 0) { - error << string_compose(_("AudioSource: cannot open peakpath (b) \"%1\" (%2)"), peakpath, strerror (errno)) << endmsg; - return 0; - } + off_t map_off = (uint32_t) (ceil (start / (double) samples_per_file_peak)) * sizeof(PeakData); + off_t read_map_off = map_off & ~(bufsize - 1); + off_t map_delta = map_off - read_map_off; + size_t raw_map_length = chunksize * sizeof(PeakData); + size_t map_length = (chunksize * sizeof(PeakData)) + map_delta; + + if (_first_run || (_last_scale != samples_per_visual_peak) || (_last_map_off != map_off) || (_last_raw_map_length < raw_map_length)) { + peak_cache.reset (new PeakData[npeaks]); + boost::scoped_array staging (new PeakData[chunksize]); + + char* addr; +#ifdef PLATFORM_WINDOWS + HANDLE file_handle = (HANDLE) _get_osfhandle(int(sfd)); + HANDLE map_handle; + LPVOID view_handle; + bool err_flag; + + map_handle = CreateFileMapping(file_handle, NULL, PAGE_READONLY, 0, 0, NULL); + if (map_handle == NULL) { + error << string_compose (_("map failed - could not create file mapping for peakfile %1."), _peakpath) << endmsg; + return -1; + } - while (nvisual_peaks < npeaks) { + view_handle = MapViewOfFile(map_handle, FILE_MAP_READ, 0, read_map_off, map_length); + if (view_handle == NULL) { + error << string_compose (_("map failed - could not map peakfile %1."), _peakpath) << endmsg; + return -1; + } - if (i == stored_peaks_read) { + addr = (char *) view_handle; - uint32_t start_byte = current_stored_peak * sizeof(PeakData); - tnp = min ((_length/samples_per_file_peak - current_stored_peak), (nframes_t) expected_peaks); - to_read = min (chunksize, tnp); - -#ifdef DEBUG_READ_PEAKS - cerr << "read " << sizeof (PeakData) * to_read << " from peakfile @ " << start_byte << endl; -#endif - - if ((nread = ::pread (_peakfile, staging, sizeof (PeakData) * to_read, start_byte)) - != sizeof (PeakData) * to_read) { - - off_t fend = lseek (_peakfile, 0, SEEK_END); - - cerr << "AudioSource[" - << _name - << "]: cannot read peak data from peakfile (" - << (nread / sizeof(PeakData)) - << " peaks instead of " - << to_read - << ") (" - << strerror (errno) - << ')' - << " at start_byte = " << start_byte - << " _length = " << _length << " versus len = " << fend - << " expected maxpeaks = " << (_length - current_frame)/samples_per_file_peak - << " npeaks was " << npeaks - << endl; - goto out; - } - - i = 0; - stored_peaks_read = nread / sizeof(PeakData); + memcpy ((void*)staging.get(), (void*)(addr + map_delta), raw_map_length); + + err_flag = UnmapViewOfFile (view_handle); + err_flag = CloseHandle(map_handle); + if(!err_flag) { + error << string_compose (_("unmap failed - could not unmap peakfile %1."), _peakpath) << endmsg; + return -1; + } +#else + addr = (char*) mmap (0, map_length, PROT_READ, MAP_PRIVATE, sfd, read_map_off); + if (addr == MAP_FAILED) { + error << string_compose (_("map failed - could not mmap peakfile %1."), _peakpath) << endmsg; + return -1; } - - xmax = -1.0; - xmin = 1.0; - while ((i < stored_peaks_read) && (current_stored_peak <= stored_peak_before_next_visual_peak)) { + memcpy ((void*)staging.get(), (void*)(addr + map_delta), raw_map_length); + munmap (addr, map_length); +#endif + while (nvisual_peaks < read_npeaks) { + + xmax = -1.0; + xmin = 1.0; + + while ((current_stored_peak <= stored_peak_before_next_visual_peak) && (i < chunksize)) { - xmax = max (xmax, staging[i].max); - xmin = min (xmin, staging[i].min); - ++i; - ++current_stored_peak; - --expected_peaks; + xmax = max (xmax, staging[i].max); + xmin = min (xmin, staging[i].min); + ++i; + ++current_stored_peak; + } + + peak_cache[nvisual_peaks].max = xmax; + peak_cache[nvisual_peaks].min = xmin; + ++nvisual_peaks; + next_visual_peak_sample = min ((double) start + cnt, (next_visual_peak_sample + samples_per_visual_peak)); + stored_peak_before_next_visual_peak = (uint32_t) next_visual_peak_sample / samples_per_file_peak; } - peaks[nvisual_peaks].max = xmax; - peaks[nvisual_peaks].min = xmin; - ++nvisual_peaks; - ++next_visual_peak; + if (zero_fill) { + cerr << "Zero fill end of peaks (@ " << read_npeaks << " with " << zero_fill << ")" << endl; + memset (&peak_cache[read_npeaks], 0, sizeof (PeakData) * zero_fill); + } - //next_visual_peak_frame = min ((next_visual_peak * samples_per_visual_peak), (next_visual_peak_frame+samples_per_visual_peak) ); - next_visual_peak_frame = min ((double) start+cnt, (next_visual_peak_frame+samples_per_visual_peak) ); - stored_peak_before_next_visual_peak = (uint32_t) next_visual_peak_frame / samples_per_file_peak; + _first_run = false; + _last_scale = samples_per_visual_peak; + _last_map_off = map_off; + _last_raw_map_length = raw_map_length; } - if (zero_fill) { - memset (&peaks[npeaks], 0, sizeof (PeakData) * zero_fill); - } - - ret = 0; + memcpy ((void*)peaks, (void*)peak_cache.get(), npeaks * sizeof(PeakData)); } else { - -#ifdef DEBUG_READ_PEAKS - cerr << "UPSAMPLE\n"; -#endif - /* the caller wants + DEBUG_TRACE (DEBUG::Peaks, "UPSAMPLE\n"); - - less frames-per-peak (more resolution) + /* the caller wants + + - less samples-per-peak (more resolution) - more peaks than stored in the Peakfile So, fetch data from the raw source, and generate peak data on the fly. */ - nframes_t frames_read = 0; - nframes_t current_frame = start; - nframes_t i = 0; - nframes_t nvisual_peaks = 0; - nframes_t chunksize = (nframes_t) min (cnt, (nframes_t) 4096); - raw_staging = new Sample[chunksize]; - - nframes_t frame_pos = start; - double pixel_pos = floor (frame_pos / samples_per_visual_peak); - double next_pixel_pos = ceil (frame_pos / samples_per_visual_peak); - double pixels_per_frame = 1.0 / samples_per_visual_peak; + samplecnt_t samples_read = 0; + samplepos_t current_sample = start; + samplecnt_t i = 0; + samplecnt_t nvisual_peaks = 0; + samplecnt_t chunksize = (samplecnt_t) min (cnt, (samplecnt_t) 4096); + boost::scoped_array raw_staging(new Sample[chunksize]); + + samplepos_t sample_pos = start; + double pixel_pos = floor (sample_pos / samples_per_visual_peak); + double next_pixel_pos = ceil (sample_pos / samples_per_visual_peak); + double pixels_per_sample = 1.0 / samples_per_visual_peak; xmin = 1.0; xmax = -1.0; - while (nvisual_peaks < npeaks) { + while (nvisual_peaks < read_npeaks) { - if (i == frames_read) { - - to_read = min (chunksize, (_length - current_frame)); + if (i == samples_read) { - if (to_read == 0) { - /* XXX ARGH .. out by one error ... need to figure out why this happens - and fix it rather than do this band-aid move. + to_read = min (chunksize, (samplecnt_t)(_length - current_sample)); + + if (current_sample >= _length) { + + /* hmm, error condition - we've reached the end of the file + without generating all the peak data. cook up a zero-filled + data buffer and then use it. this is simpler than + adjusting zero_fill and read_npeaks and then breaking out of + this loop early */ - zero_fill = npeaks - nvisual_peaks; - break; - } - if ((frames_read = read_unlocked (raw_staging, current_frame, to_read)) == 0) { - error << string_compose(_("AudioSource[%1]: peak read - cannot read %2 samples at offset %3 of %4 (%5)"), - _name, to_read, current_frame, _length, strerror (errno)) - << endmsg; - goto out; - } - + memset (raw_staging.get(), 0, sizeof (Sample) * chunksize); + + } else { + + to_read = min (chunksize, (_length - current_sample)); + + + if ((samples_read = read_unlocked (raw_staging.get(), current_sample, to_read)) == 0) { + error << string_compose(_("AudioSource[%1]: peak read - cannot read %2 samples at offset %3 of %4 (%5)"), + _name, to_read, current_sample, _length, strerror (errno)) + << endmsg; + return -1; + } + } + i = 0; } - + xmax = max (xmax, raw_staging[i]); xmin = min (xmin, raw_staging[i]); ++i; - ++current_frame; - pixel_pos += pixels_per_frame; + ++current_sample; + pixel_pos += pixels_per_sample; if (pixel_pos >= next_pixel_pos) { @@ -558,107 +704,114 @@ AudioSource::read_peaks_with_fpp (PeakData *peaks, nframes_t npeaks, nframes_t s next_pixel_pos = ceil (pixel_pos + 0.5); } } - + if (zero_fill) { - memset (&peaks[npeaks], 0, sizeof (PeakData) * zero_fill); + memset (&peaks[read_npeaks], 0, sizeof (PeakData) * zero_fill); } - - ret = 0; - } - - out: - if (_peakfile >= 0) { - close (_peakfile); } - delete [] staging; - delete [] raw_staging; - -#ifdef DEBUG_READ_PEAKS - cerr << "RP DONE\n"; -#endif - - return ret; + DEBUG_TRACE (DEBUG::Peaks, "READPEAKS DONE\n"); + return 0; } -#undef DEBUG_PEAK_BUILD - int AudioSource::build_peaks_from_scratch () { - nframes_t current_frame; - nframes_t cnt; - Sample* buf = 0; - nframes_t frames_read; - nframes_t frames_to_read; - const nframes_t bufsize = 65536; // 256kB per disk read for mono data is about ideal + const samplecnt_t bufsize = 65536; // 256kB per disk read for mono data is about ideal + + DEBUG_TRACE (DEBUG::Peaks, "Building peaks from scratch\n"); int ret = -1; { /* hold lock while building peaks */ - Glib::Mutex::Lock lp (_lock); - + Glib::Threads::Mutex::Lock lp (_lock); + if (prepare_for_peakfile_writes ()) { goto out; } - - current_frame = 0; - cnt = _length; + + samplecnt_t current_sample = 0; + samplecnt_t cnt = _length; + _peaks_built = false; - buf = new Sample[bufsize]; - + boost::scoped_array buf(new Sample[bufsize]); + while (cnt) { - - frames_to_read = min (bufsize, cnt); - if ((frames_read = read_unlocked (buf, current_frame, frames_to_read)) != frames_to_read) { + samplecnt_t samples_to_read = min (bufsize, cnt); + samplecnt_t samples_read; + + if ((samples_read = read_unlocked (buf.get(), current_sample, samples_to_read)) != samples_to_read) { error << string_compose(_("%1: could not write read raw data for peak computation (%2)"), _name, strerror (errno)) << endmsg; done_with_peakfile_writes (false); goto out; } - if (compute_and_write_peaks (buf, current_frame, frames_read, true, false, _FPP)) { + lp.release(); // allow butler to refill buffers + + if (_session.deletion_in_progress() || _session.peaks_cleanup_in_progres()) { + cerr << "peak file creation interrupted: " << _name << endmsg; + lp.acquire(); + done_with_peakfile_writes (false); + goto out; + } + + if (compute_and_write_peaks (buf.get(), current_sample, samples_read, true, false, _FPP)) { break; } - - current_frame += frames_read; - cnt -= frames_read; + + current_sample += samples_read; + cnt -= samples_read; + + lp.acquire(); } if (cnt == 0) { /* success */ truncate_peakfile(); - } + } done_with_peakfile_writes ((cnt == 0)); - } - - { - Glib::Mutex::Lock lm (_peaks_ready_lock); - - if (_peaks_built) { - PeaksReady (); /* EMIT SIGNAL */ + if (cnt == 0) { ret = 0; } } out: if (ret) { - unlink (peakpath.c_str()); + DEBUG_TRACE (DEBUG::Peaks, string_compose("Could not write peak data, attempting to remove peakfile %1\n", _peakpath)); + ::g_unlink (_peakpath.c_str()); } - delete [] buf; - return ret; } +int +AudioSource::close_peakfile () +{ + Glib::Threads::Mutex::Lock lp (_lock); + if (_peakfile_fd >= 0) { + close (_peakfile_fd); + _peakfile_fd = -1; + } + if (!_peakpath.empty()) { + ::g_unlink (_peakpath.c_str()); + } + _peaks_built = false; + return 0; +} + int AudioSource::prepare_for_peakfile_writes () { - if ((peakfile = ::open (peakpath.c_str(), O_RDWR|O_CREAT, 0664)) < 0) { - error << string_compose(_("AudioSource: cannot open peakpath (c) \"%1\" (%2)"), peakpath, strerror (errno)) << endmsg; + if (_session.deletion_in_progress() || _session.peaks_cleanup_in_progres()) { + return -1; + } + + if ((_peakfile_fd = g_open (_peakpath.c_str(), O_CREAT|O_RDWR, 0664)) < 0) { + error << string_compose(_("AudioSource: cannot open _peakpath (c) \"%1\" (%2)"), _peakpath, strerror (errno)) << endmsg; return -1; } return 0; @@ -667,74 +820,93 @@ AudioSource::prepare_for_peakfile_writes () void AudioSource::done_with_peakfile_writes (bool done) { + if (_session.deletion_in_progress() || _session.peaks_cleanup_in_progres()) { + if (_peakfile_fd) { + close (_peakfile_fd); + _peakfile_fd = -1; + } + return; + } + if (peak_leftover_cnt) { compute_and_write_peaks (0, 0, 0, true, false, _FPP); } - + if (done) { + Glib::Threads::Mutex::Lock lm (_peaks_ready_lock); _peaks_built = true; + PeaksReady (); /* EMIT SIGNAL */ } - if (peakfile >= 0) { - close (peakfile); - peakfile = -1; - } + close (_peakfile_fd); + _peakfile_fd = -1; } +/** @param first_sample Offset from the source start of the first sample to + * process. _lock MUST be held by caller. +*/ int -AudioSource::compute_and_write_peaks (Sample* buf, nframes_t first_frame, nframes_t cnt, bool force, bool intermediate_peaks_ready) +AudioSource::compute_and_write_peaks (Sample* buf, samplecnt_t first_sample, samplecnt_t cnt, + bool force, bool intermediate_peaks_ready) { - return compute_and_write_peaks (buf, first_frame, cnt, force, intermediate_peaks_ready, _FPP); + return compute_and_write_peaks (buf, first_sample, cnt, force, intermediate_peaks_ready, _FPP); } int -AudioSource::compute_and_write_peaks (Sample* buf, nframes_t first_frame, nframes_t cnt, bool force, - bool intermediate_peaks_ready, nframes_t fpp) +AudioSource::compute_and_write_peaks (Sample* buf, samplecnt_t first_sample, samplecnt_t cnt, + bool force, bool intermediate_peaks_ready, samplecnt_t fpp) { - Sample* buf2 = 0; - nframes_t to_do; + samplecnt_t to_do; uint32_t peaks_computed; - PeakData* peakbuf = 0; - int ret = -1; - nframes_t current_frame; - nframes_t frames_done; + samplepos_t current_sample; + samplecnt_t samples_done; const size_t blocksize = (128 * 1024); off_t first_peak_byte; + boost::scoped_array buf2; - if (peakfile < 0) { - prepare_for_peakfile_writes (); + if (_peakfile_fd < 0) { + if (prepare_for_peakfile_writes ()) { + return -1; + } } restart: if (peak_leftover_cnt) { - if (first_frame != peak_leftover_frame + peak_leftover_cnt) { + if (first_sample != peak_leftover_sample + peak_leftover_cnt) { - /* uh-oh, ::seek() since the last ::compute_and_write_peaks(), + /* uh-oh, ::seek() since the last ::compute_and_write_peaks(), and we have leftovers. flush a single peak (since the leftovers never represent more than that, and restart. */ - + PeakData x; - + x.min = peak_leftovers[0]; x.max = peak_leftovers[0]; - off_t byte = (peak_leftover_frame / fpp) * sizeof (PeakData); + off_t byte = (peak_leftover_sample / fpp) * sizeof (PeakData); + + off_t offset = lseek (_peakfile_fd, byte, SEEK_SET); + + if (offset != byte) { + error << string_compose(_("%1: could not seek in peak file data (%2)"), _name, strerror (errno)) << endmsg; + return -1; + } - if (::pwrite (peakfile, &x, sizeof (PeakData), byte) != sizeof (PeakData)) { + if (::write (_peakfile_fd, &x, sizeof (PeakData)) != sizeof (PeakData)) { error << string_compose(_("%1: could not write peak file data (%2)"), _name, strerror (errno)) << endmsg; - goto out; + return -1; } _peak_byte_max = max (_peak_byte_max, (off_t) (byte + sizeof(PeakData))); - { - Glib::Mutex::Lock lm (_peaks_ready_lock); - PeakRangeReady (peak_leftover_frame, peak_leftover_cnt); /* EMIT SIGNAL */ + { + Glib::Threads::Mutex::Lock lm (_peaks_ready_lock); + PeakRangeReady (peak_leftover_sample, peak_leftover_cnt); /* EMIT SIGNAL */ if (intermediate_peaks_ready) { PeaksReady (); /* EMIT SIGNAL */ - } + } } /* left overs are done */ @@ -750,36 +922,38 @@ AudioSource::compute_and_write_peaks (Sample* buf, nframes_t first_frame, nframe /* make a new contiguous buffer containing leftovers and the new stuff */ to_do = cnt + peak_leftover_cnt; - buf2 = new Sample[to_do]; + buf2.reset(new Sample[to_do]); /* the remnants */ - memcpy (buf2, peak_leftovers, peak_leftover_cnt * sizeof (Sample)); + memcpy (buf2.get(), peak_leftovers, peak_leftover_cnt * sizeof (Sample)); /* the new stuff */ - memcpy (buf2+peak_leftover_cnt, buf, cnt * sizeof (Sample)); + if (buf && cnt > 0) { + memcpy (buf2.get()+peak_leftover_cnt, buf, cnt * sizeof (Sample)); + } /* no more leftovers */ peak_leftover_cnt = 0; /* use the temporary buffer */ - buf = buf2; + buf = buf2.get(); /* make sure that when we write into the peakfile, we startup where we left off */ - first_frame = peak_leftover_frame; - + first_sample = peak_leftover_sample; + } else { to_do = cnt; } - peakbuf = new PeakData[(to_do/fpp)+1]; + boost::scoped_array peakbuf(new PeakData[(to_do/fpp)+1]); peaks_computed = 0; - current_frame = first_frame; - frames_done = 0; + current_sample = first_sample; + samples_done = 0; while (to_do) { - /* if some frames were passed in (i.e. we're not flushing leftovers) + /* if some samples were passed in (i.e. we're not flushing leftovers) and there are less than fpp to do, save them till next time */ @@ -794,14 +968,14 @@ AudioSource::compute_and_write_peaks (Sample* buf, nframes_t first_frame, nframe } memcpy (peak_leftovers, buf, to_do * sizeof (Sample)); peak_leftover_cnt = to_do; - peak_leftover_frame = current_frame; + peak_leftover_sample = current_sample; /* done for now */ break; } - - nframes_t this_time = min (fpp, to_do); + + samplecnt_t this_time = min (fpp, to_do); peakbuf[peaks_computed].max = buf[0]; peakbuf[peaks_computed].min = buf[0]; @@ -811,57 +985,65 @@ AudioSource::compute_and_write_peaks (Sample* buf, nframes_t first_frame, nframe peaks_computed++; buf += this_time; to_do -= this_time; - frames_done += this_time; - current_frame += this_time; + samples_done += this_time; + current_sample += this_time; } - - first_peak_byte = (first_frame / fpp) * sizeof (PeakData); + + first_peak_byte = (first_sample / fpp) * sizeof (PeakData); if (can_truncate_peaks()) { /* on some filesystems (ext3, at least) this helps to reduce fragmentation of the peakfiles. its not guaranteed to do so, and even on ext3 (as of december 2006) - it does not cause single-extent allocation even for peakfiles of + it does not cause single-extent allocation even for peakfiles of less than BLOCKSIZE bytes. only call ftruncate if we'll make the file larger. */ - - off_t endpos = lseek (peakfile, 0, SEEK_END); + + off_t endpos = lseek (_peakfile_fd, 0, SEEK_END); off_t target_length = blocksize * ((first_peak_byte + blocksize + 1) / blocksize); - + if (endpos < target_length) { - ftruncate (peakfile, target_length); - /* error doesn't actually matter though, so continue on without testing */ + DEBUG_TRACE(DEBUG::Peaks, string_compose ("Truncating Peakfile %1\n", _peakpath)); + if (ftruncate (_peakfile_fd, target_length)) { + /* error doesn't actually matter so continue on without testing */ + } } } - if (::pwrite (peakfile, peakbuf, sizeof (PeakData) * peaks_computed, first_peak_byte) != (ssize_t) (sizeof (PeakData) * peaks_computed)) { + + off_t offset = lseek(_peakfile_fd, first_peak_byte, SEEK_SET); + + if (offset != first_peak_byte) { + error << string_compose(_("%1: could not seek in peak file data (%2)"), _name, strerror (errno)) << endmsg; + return -1; + } + + ssize_t bytes_to_write = sizeof (PeakData) * peaks_computed; + + ssize_t bytes_written = ::write (_peakfile_fd, peakbuf.get(), bytes_to_write); + + if (bytes_written != bytes_to_write) { error << string_compose(_("%1: could not write peak file data (%2)"), _name, strerror (errno)) << endmsg; - goto out; + return -1; } - _peak_byte_max = max (_peak_byte_max, (off_t) (first_peak_byte + sizeof(PeakData)*peaks_computed)); + _peak_byte_max = max (_peak_byte_max, (off_t) (first_peak_byte + bytes_to_write)); - if (frames_done) { - Glib::Mutex::Lock lm (_peaks_ready_lock); - PeakRangeReady (first_frame, frames_done); /* EMIT SIGNAL */ + if (samples_done) { + Glib::Threads::Mutex::Lock lm (_peaks_ready_lock); + PeakRangeReady (first_sample, samples_done); /* EMIT SIGNAL */ if (intermediate_peaks_ready) { PeaksReady (); /* EMIT SIGNAL */ } } - ret = 0; - - out: - delete [] peakbuf; - delete [] buf2; - - return ret; + return 0; } void AudioSource::truncate_peakfile () { - if (peakfile < 0) { + if (_peakfile_fd < 0) { error << string_compose (_("programming error: %1"), "AudioSource::truncate_peakfile() called without open peakfile descriptor") << endmsg; return; @@ -869,54 +1051,87 @@ AudioSource::truncate_peakfile () /* truncate the peakfile down to its natural length if necessary */ - off_t end = lseek (peakfile, 0, SEEK_END); - - if (end > _peak_byte_max) { - ftruncate (peakfile, _peak_byte_max); - } -} + off_t end = lseek (_peakfile_fd, 0, SEEK_END); -bool -AudioSource::file_changed (ustring path) -{ - struct stat stat_file; - struct stat stat_peak; - - int e1 = stat (path.c_str(), &stat_file); - int e2 = stat (peak_path(path).c_str(), &stat_peak); - - if (!e1 && !e2 && stat_file.st_mtime > stat_peak.st_mtime){ - return true; - } else { - return false; + if (end > _peak_byte_max) { + DEBUG_TRACE(DEBUG::Peaks, string_compose ("Truncating Peakfile %1\n", _peakpath)); + if (ftruncate (_peakfile_fd, _peak_byte_max)) { + error << string_compose (_("could not truncate peakfile %1 to %2 (error: %3)"), + _peakpath, _peak_byte_max, errno) << endmsg; + } } } -nframes_t +samplecnt_t AudioSource::available_peaks (double zoom_factor) const { - off_t end; - if (zoom_factor < _FPP) { - return length(); // peak data will come from the audio file - } - + return length(_timeline_position); // peak data will come from the audio file + } + /* peak data comes from peakfile, but the filesize might not represent the valid data due to ftruncate optimizations, so use _peak_byte_max state. XXX - there might be some atomicity issues here, we should probably add a lock, but _peak_byte_max only monotonically increases after initialization. */ - end = _peak_byte_max; + off_t end = _peak_byte_max; return (end/sizeof(PeakData)) * _FPP; } void -AudioSource::update_length (nframes_t pos, nframes_t cnt) +AudioSource::mark_streaming_write_completed (const Lock& lock) { - if (pos + cnt > _length) { - _length = pos+cnt; + Glib::Threads::Mutex::Lock lm (_peaks_ready_lock); + + if (_peaks_built) { + PeaksReady (); /* EMIT SIGNAL */ } } +void +AudioSource::allocate_working_buffers (samplecnt_t framerate) +{ + Glib::Threads::Mutex::Lock lm (_level_buffer_lock); + + + /* Note: we don't need any buffers allocated until + a level 1 audiosource is created, at which + time we'll call ::ensure_buffers_for_level() + with the right value and do the right thing. + */ + + if (!_mixdown_buffers.empty()) { + ensure_buffers_for_level_locked ( _mixdown_buffers.size(), framerate); + } +} + +void +AudioSource::ensure_buffers_for_level (uint32_t level, samplecnt_t sample_rate) +{ + Glib::Threads::Mutex::Lock lm (_level_buffer_lock); + ensure_buffers_for_level_locked (level, sample_rate); +} + +void +AudioSource::ensure_buffers_for_level_locked (uint32_t level, samplecnt_t sample_rate) +{ + samplecnt_t nframes = (samplecnt_t) floor (Config->get_audio_playback_buffer_seconds() * sample_rate); + + /* this may be called because either "level" or "sample_rate" have + * changed. and it may be called with "level" smaller than the current + * number of buffers, because a new compound region has been created at + * a more shallow level than the deepest one we currently have. + */ + + uint32_t limit = max ((size_t) level, _mixdown_buffers.size()); + + _mixdown_buffers.clear (); + _gain_buffers.clear (); + + for (uint32_t n = 0; n < limit; ++n) { + _mixdown_buffers.push_back (boost::shared_array (new Sample[nframes])); + _gain_buffers.push_back (boost::shared_array (new gain_t[nframes])); + } +}