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Added support for WAV file 'fact' chunk
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oparviai
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README.html
143
README.html
@ -22,11 +22,11 @@ changing the sound tempo, pitch and playback rate parameters
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independently from each other, i.e.:</p>
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<ul>
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<li> Sound tempo can be increased or decreased while maintaining the
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original pitch </li>
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original pitch</li>
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<li> Sound pitch can be increased or decreased while maintaining the
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original tempo </li>
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original tempo</li>
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<li> Change playback rate that affects both tempo and pitch at the
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same time </li>
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same time</li>
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<li> Choose any combination of tempo/pitch/rate</li>
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</ul>
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<h3>1.1 Contact information </h3>
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@ -147,7 +147,7 @@ and 32bit floating point values, the default is 32bit floating point. </p>
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"STTypes.h" by choosing one of the following defines:</p>
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<ul>
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<li> <span style="font-weight: bold;">#define
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SOUNDTOUCH_INTEGER_SAMPLES</span> for 16bit signed integer </li>
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SOUNDTOUCH_INTEGER_SAMPLES</span> for 16bit signed integer</li>
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<li> <span style="font-weight: bold;">#define </span><span
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style="font-weight: bold;">SOUNDTOUCH_</span><span
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style="font-weight: bold;">FLOAT_SAMPLES</span> for 32bit floating
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@ -173,7 +173,7 @@ the channels, which consequently would ruin the stereo effect.</p>
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<li> Input/output processing latency for the SoundTouch processor is
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around 100 ms. This is when time-stretching is used. If the rate
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transposing effect alone is used, the latency requirement is much
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shorter, see section 'About algorithms'. </li>
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shorter, see section 'About algorithms'.</li>
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<li> Processing CD-quality sound (16bit stereo sound with 44100H
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sample rate) in real-time or faster is possible starting from
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processors equivalent to Intel Pentium 133Mh or better, if using the
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@ -207,9 +207,9 @@ is around 100 ms.</p>
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to produce the tempo, pitch and rate controls:</p>
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<ul>
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<li> <strong>'Tempo'</strong> control is implemented purely by
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time-stretching. </li>
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time-stretching.</li>
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<li> <strong>'Rate</strong>' control is implemented purely by sample
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rate transposing. </li>
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rate transposing.</li>
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<li> <strong>'Pitch</strong>' control is implemented as a
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combination of time-stretching and sample rate transposing. For
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example, to increase pitch the audio stream is first time-stretched to
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@ -241,7 +241,7 @@ when increasing the tempo and vice versa. <br>
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<br>
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By default, this setting value is calculated automatically according to
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tempo value.<br>
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</li>
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</li>
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<li> <strong>DEFAULT_SEEKWINDOW_MS</strong>: The seeking window
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default length in milliseconds is for the algorithm that seeks the best
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possible overlapping location. This determines from how wide a sample
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@ -257,7 +257,7 @@ this setting.<br>
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<br>
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By default, this setting value is calculated automatically according to
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tempo value.<br>
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</li>
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</li>
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<li> <strong>DEFAULT_OVERLAP_MS</strong>: Overlap length in
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milliseconds. When the sound sequences are mixed back together to form
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again a continuous sound stream, this parameter defines how much the
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@ -337,18 +337,18 @@ function with parameter id of SETTING_USE_QUICKSEEK and value
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<li> Intel MMX optimized routines are used with compatible CPUs when
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16bit integer sample type is used. MMX optimizations are available both
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in Win32 and Gnu/x86 platforms. Compatible processors are Intel
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PentiumMMX and later; AMD K6-2, Athlon and later. </li>
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PentiumMMX and later; AMD K6-2, Athlon and later.</li>
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<li> Intel SSE optimized routines are used with compatible CPUs when
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floating point sample type is used. SSE optimizations are currently
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implemented for Win32 platform only. Processors compatible with SSE
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extension are Intel processors starting from Pentium-III, and AMD
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processors starting from Athlon XP. </li>
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processors starting from Athlon XP.</li>
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<li> AMD 3DNow! optimized routines are used with compatible CPUs when
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floating point sample type is used, but SSE extension isn't supported .
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3DNow! optimizations are currently implemented for Win32 platform only.
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These optimizations are used in AMD K6-2 and Athlon (classic) CPU's;
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better performing SSE routines are used with AMD processor starting
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from Athlon XP. </li>
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from Athlon XP.</li>
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</ul>
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<hr>
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<h2><a name="SoundStretch"></a>4. SoundStretch audio processing utility
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@ -454,15 +454,15 @@ transposing. Gains speed but loses sound quality. </td>
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<li> To use standard input/output pipes for processing, give "stdin"
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and "stdout" as input/output filenames correspondingly. The standard
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input/output pipes will still carry the audio data in .wav audio file
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format. </li>
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format.</li>
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<li> The numerical switches allow both integer (e.g. "-tempo=123")
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and decimal (e.g. "-tempo=123.45") numbers. </li>
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and decimal (e.g. "-tempo=123.45") numbers.</li>
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<li> The "-naa" and/or "-quick" switches can be used to reduce CPU
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usage while compromising some sound quality </li>
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usage while compromising some sound quality</li>
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<li> The BPM detection algorithm works by detecting repeating bass or
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drum patterns at low frequencies of <250Hz. A lower-than-expected
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BPM figure may be reported for music with uneven or complex bass
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patterns. </li>
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patterns.</li>
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</ul>
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<h3>4.2. SoundStretch usage examples </h3>
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<p><strong>Example 1</strong></p>
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@ -507,6 +507,7 @@ and estimates the BPM rate:</p>
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<ul>
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<li>Replaced Windows-like 'BOOL' types with native 'bool'</li>
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<li>Fixed bug in Android.mk make file</li>
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<li>Changed documentation token to "dist_doc_DATA" in Makefile.am file</li>
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</ul>
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<p><b>1.8.0:</b></p>
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<ul>
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@ -539,7 +540,7 @@ and estimates the BPM rate:</p>
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<p><b>1.6.0:</b></p>
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<ul>
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<li> Added automatic cutoff threshold adaptation to beat detection
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routine to better adapt BPM calculation to different types of music </li>
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routine to better adapt BPM calculation to different types of music</li>
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<li> Retired 3DNow! optimization support as 3DNow! is nowadays
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obsoleted and assembler code is nuisance to maintain</li>
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<li>Retired "configure" file from source code package due to
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@ -549,7 +550,7 @@ toolchain version for generating the "configure" file</li>
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<li>Resolved namespace/label naming conflicts with other libraries by
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replacing global labels such as INTEGER_SAMPLES with more specific
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SOUNDTOUCH_INTEGER_SAMPLES etc.<br>
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</li>
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</li>
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<li>Updated windows build scripts & project files for Visual
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Studio 2008 support</li>
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<li> Updated SoundTouch.dll API for .NET compatibility</li>
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@ -559,22 +560,22 @@ sample batch sizes</li>
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<p><strong>1.5.0:</strong></p>
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<ul>
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<li> Added normalization to correlation calculation and improvement
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automatic seek/sequence parameter calculation to improve sound quality </li>
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automatic seek/sequence parameter calculation to improve sound quality</li>
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<li> Bugfixes:
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<ul>
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<li> Fixed negative array indexing in quick seek algorithm </li>
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<li> FIR autoalias filter running too far in processing buffer </li>
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<li> Check against zero sample count in rate transposing </li>
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<li> Fixed negative array indexing in quick seek algorithm</li>
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<li> FIR autoalias filter running too far in processing buffer</li>
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<li> Check against zero sample count in rate transposing</li>
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<li> Fix for x86-64 support: Removed pop/push instructions from
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the cpu detection algorithm. </li>
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<li> Check against empty buffers in FIFOSampleBuffer </li>
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the cpu detection algorithm. </li>
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<li> Check against empty buffers in FIFOSampleBuffer</li>
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<li> Other minor fixes & code cleanup</li>
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</ul>
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</li>
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<li> Fixes in compilation scripts for non-Intel platforms </li>
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</li>
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<li> Fixes in compilation scripts for non-Intel platforms</li>
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<li> Added Dynamic-Link-Library (DLL) version of SoundTouch library
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build, provided with Delphi/Pascal wrapper for calling the dll routines
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</li>
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</li>
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<li> Added #define PREVENT_CLICK_AT_RATE_CROSSOVER that prevents a
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click artifact when crossing the nominal pitch from either positive to
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negative side or vice versa</li>
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@ -587,86 +588,91 @@ processing more than 2048 samples at one call </li>
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<p><strong>1.4.0:</strong></p>
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<ul>
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<li> Improved sound quality by automatic calculation of time stretch
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algorithm processing parameters according to tempo setting </li>
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algorithm processing parameters according to tempo setting</li>
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<li> Moved BPM detection routines from SoundStretch application into
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SoundTouch library </li>
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SoundTouch library</li>
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<li> Bugfixes: Usage of uninitialied variables, GNU build scripts,
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compiler errors due to 'const' keyword mismatch. </li>
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compiler errors due to 'const' keyword mismatch.</li>
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<li> Source code cleanup</li>
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</ul>
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<p><strong>1.3.1: </strong> </p>
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<ul>
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<li> Changed static class declaration to GCC 4.x compiler compatible
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syntax. </li>
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syntax.</li>
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<li> Enabled MMX/SSE-optimized routines also for GCC compilers.
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Earlier the MMX/SSE-optimized routines were written in
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compiler-specific inline assembler, now these routines are migrated to
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use compiler intrinsic syntax which allows compiling the same
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MMX/SSE-optimized source code with both Visual C++ and GCC compilers. </li>
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MMX/SSE-optimized source code with both Visual C++ and GCC compilers.</li>
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<li> Set floating point as the default sample format and added switch
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to the GNU configure script for selecting the other sample format.</li>
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</ul>
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<p><strong>1.3.0: </strong> </p>
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<ul>
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<li> Fixed tempo routine output duration inaccuracy due to rounding
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error </li>
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error</li>
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<li> Implemented separate processing routines for integer and
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floating arithmetic to allow improvements to floating point routines
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(earlier used algorithms mostly optimized for integer arithmetic also
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for floating point samples) </li>
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for floating point samples)</li>
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<li> Fixed a bug that distorts sound if sample rate changes during
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the sound stream </li>
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the sound stream</li>
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<li> Fixed a memory leak that appeared in MMX/SSE/3DNow! optimized
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routines </li>
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routines</li>
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<li> Reduced redundant code pieces in MMX/SSE/3DNow! optimized
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routines vs. the standard C routines. </li>
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<li> MMX routine incompatibility with new gcc compiler versions </li>
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<li> Other miscellaneous bug fixes </li>
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routines vs. the standard C routines.</li>
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<li> MMX routine incompatibility with new gcc compiler versions</li>
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<li> Other miscellaneous bug fixes</li>
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</ul>
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<p><strong>1.2.1: </strong> </p>
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<ul>
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<li> Added automake/autoconf scripts for GNU platforms (in courtesy
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of David Durham) </li>
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<li> Fixed SCALE overflow bug in rate transposer routine. </li>
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<li> Fixed 64bit address space bugs. </li>
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of David Durham)</li>
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<li> Fixed SCALE overflow bug in rate transposer routine.</li>
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<li> Fixed 64bit address space bugs.</li>
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<li> Created a 'soundtouch' namespace for SAMPLETYPE definitions.</li>
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</ul>
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<p><strong>1.2.0: </strong> </p>
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<ul>
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<li> Added support for 32bit floating point sample data type with
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SSE/3DNow! optimizations for Win32 platform (SSE/3DNow! optimizations
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currently not supported in GCC environment) </li>
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currently not supported in GCC environment)</li>
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<li> Replaced 'make-gcc' script for GNU environment by master
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Makefile </li>
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Makefile</li>
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<li> Added time-stretch routine configurability to SoundTouch main
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class </li>
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class</li>
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<li> Bugfixes</li>
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</ul>
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<p><strong>1.1.1: </strong> </p>
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<ul>
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<li> Moved SoundTouch under lesser GPL license (LGPL). This allows
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using SoundTouch library in programs that aren't released under GPL
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license. </li>
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license.</li>
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<li> Changed MMX routine organiation so that MMX optimized routines
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are now implemented in classes that are derived from the basic classes
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having the standard non-mmx routines. </li>
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<li> MMX routines to support gcc version 3. </li>
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<li> Replaced windows makefiles by script using the .dsw files </li>
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having the standard non-mmx routines.</li>
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<li> MMX routines to support gcc version 3.</li>
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<li> Replaced windows makefiles by script using the .dsw files</li>
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</ul>
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<p><strong>1.0.1: </strong> </p>
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<ul>
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<li> "mmx_gcc.cpp": Added "using namespace std" and removed "return
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0" from a function with void return value to fix compiler errors when
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compiling the library in Solaris environment. </li>
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compiling the library in Solaris environment.</li>
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<li> Moved file "FIFOSampleBuffer.h" to "include" directory to allow
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accessing the FIFOSampleBuffer class from external files. </li>
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accessing the FIFOSampleBuffer class from external files.</li>
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</ul>
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<p><strong>1.0: </strong> </p>
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<ul>
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<li> Initial release </li>
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<li> Initial release</li>
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</ul>
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<p> </p>
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<h3>5.2. SoundStretch application Change History </h3>
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<p><b>1.8.1:</b></p>
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<ul>
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<li>Added support for WAV file 'fact' information chunk.</li>
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</ul>
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<p><b>1.7.0:</b></p>
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<ul>
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<li>Bugfixes in Wavfile: exception string formatting, avoid getLengthMs() integer
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@ -681,14 +687,14 @@ music processing.</li>
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<p><strong>1.4.0:</strong></p>
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<ul>
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<li> Moved BPM detection routines from SoundStretch application into
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SoundTouch library </li>
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SoundTouch library</li>
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<li> Allow using standard input/output pipes as audio processing
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input/output streams</li>
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</ul>
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<p><strong>1.3.0:</strong></p>
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<ul>
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<li> Simplified accessing WAV files with floating point sample
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format. </li>
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format.</li>
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</ul>
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<p><strong>1.2.1: </strong> </p>
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<ul>
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@ -696,31 +702,31 @@ format. </li>
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</ul>
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<p><strong>1.2.0: </strong> </p>
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<ul>
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<li> Added support for 32bit floating point sample data type </li>
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<li> Restructured the BPM routines into separate library </li>
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<li> Added support for 32bit floating point sample data type</li>
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<li> Restructured the BPM routines into separate library</li>
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<li> Fixed big-endian conversion bugs in WAV file routines (hopefully
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:)</li>
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</ul>
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<p><strong>1.1.1: </strong> </p>
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<ul>
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<li> Fixed bugs in WAV file reading & added byte-order conversion
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for big-endian processors. </li>
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for big-endian processors.</li>
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<li> Moved SoundStretch source code under 'example' directory to
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highlight difference from SoundTouch stuff. </li>
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<li> Replaced windows makefiles by script using the .dsw files </li>
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highlight difference from SoundTouch stuff.</li>
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<li> Replaced windows makefiles by script using the .dsw files</li>
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<li> Output file name isn't required if output isn't desired (e.g. if
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using the switch '-bpm' in plain format only) </li>
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using the switch '-bpm' in plain format only)</li>
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</ul>
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<p><strong>1.1:</strong></p>
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<ul>
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<li> Fixed "Release" settings in Microsoft Visual C++ project file
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(.dsp) </li>
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(.dsp)</li>
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<li> Added beats-per-minute (BPM) detection routine and command-line
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switch "-bpm" </li>
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switch "-bpm"</li>
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</ul>
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<p><strong>1.01: </strong> </p>
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<ul>
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<li> Initial release </li>
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<li> Initial release</li>
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</ul>
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<hr>
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<h2>6. Acknowledgements </h2>
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@ -746,12 +752,13 @@ submitted bugfixes since SoundTouch v1.3.1: </p>
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<li> Paulo Pizarro</li>
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<li> Blaise Potard</li>
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<li> RJ Ryan</li>
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<li> Justin Frankel </li>
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<li> Jason Garland </li>
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<li> Masa H. </li>
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<li> Takashi Iwai </li>
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<li> Justin Frankel</li>
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<li> Jason Garland</li>
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<li> Masa H.</li>
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<li> Takashi Iwai</li>
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<li> Thomas Klausner</li>
|
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<li> Mathias Möhl</li>
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<li> Yuval Naveh </li>
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<li> Yuval Naveh</li>
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<li> Paulo Pizarro</li>
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<li> Blaise Potard</li>
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<li> Michael Pruett</li>
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@ -60,6 +60,7 @@ using namespace std;
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static const char riffStr[] = "RIFF";
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static const char waveStr[] = "WAVE";
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static const char fmtStr[] = "fmt ";
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static const char factStr[] = "fact";
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static const char dataStr[] = "data";
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@ -558,6 +559,42 @@ int WavInFile::readHeaderBlock()
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return 0;
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}
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else if (strcmp(label, factStr) == 0)
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{
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int nLen, nDump;
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// 'fact' block
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memcpy(header.fact.fact_field, factStr, 4);
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// read length of the fact field
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if (fread(&nLen, sizeof(int), 1, fptr) != 1) return -1;
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// swap byte order if necessary
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_swap32(nLen); // int fact_len;
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header.fact.fact_len = nLen;
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// calculate how much length differs from expected
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nDump = nLen - ((int)sizeof(header.fact) - 8);
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// if format_len is larger than expected, read only as much data as we've space for
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if (nDump > 0)
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{
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nLen = sizeof(header.fact) - 8;
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}
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// read data
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if (fread(&(header.fact.fact_sample_len), nLen, 1, fptr) != 1) return -1;
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// swap byte order if necessary
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_swap32((int &)header.fact.fact_sample_len); // int sample_length;
|
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// if fact_len is larger than expected, skip the extra data
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if (nDump > 0)
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{
|
||||
fseek(fptr, nDump, SEEK_CUR);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
else if (strcmp(label, dataStr) == 0)
|
||||
{
|
||||
// 'data' block
|
||||
@ -642,6 +679,7 @@ uint WavInFile::getDataSizeInBytes() const
|
||||
uint WavInFile::getNumSamples() const
|
||||
{
|
||||
if (header.format.byte_per_sample == 0) return 0;
|
||||
if (header.format.fixed > 1) return header.fact.fact_sample_len;
|
||||
return header.data.data_len / (unsigned short)header.format.byte_per_sample;
|
||||
}
|
||||
|
||||
@ -739,6 +777,11 @@ void WavOutFile::fillInHeader(uint sampleRate, uint bits, uint channels)
|
||||
header.format.byte_rate = header.format.byte_per_sample * (int)sampleRate;
|
||||
header.format.sample_rate = (int)sampleRate;
|
||||
|
||||
// fill in the 'fact' part...
|
||||
memcpy(&(header.fact.fact_field), factStr, 4);
|
||||
header.fact.fact_len = 4;
|
||||
header.fact.fact_sample_len = 0;
|
||||
|
||||
// fill in the 'data' part..
|
||||
|
||||
// copy string 'data' to data_field
|
||||
@ -751,9 +794,10 @@ void WavOutFile::fillInHeader(uint sampleRate, uint bits, uint channels)
|
||||
void WavOutFile::finishHeader()
|
||||
{
|
||||
// supplement the file length into the header structure
|
||||
header.riff.package_len = bytesWritten + 36;
|
||||
header.riff.package_len = bytesWritten + sizeof(WavHeader) - sizeof(WavRiff) + 4;
|
||||
header.data.data_len = bytesWritten;
|
||||
|
||||
header.fact.fact_sample_len = bytesWritten / header.format.byte_per_sample;
|
||||
|
||||
writeHeader();
|
||||
}
|
||||
|
||||
@ -775,7 +819,9 @@ void WavOutFile::writeHeader()
|
||||
_swap16((short &)hdrTemp.format.byte_per_sample);
|
||||
_swap16((short &)hdrTemp.format.bits_per_sample);
|
||||
_swap32((int &)hdrTemp.data.data_len);
|
||||
|
||||
_swap32((int &)hdrTemp.fact.fact_len);
|
||||
_swap32((int &)hdrTemp.fact.fact_sample_len);
|
||||
|
||||
// write the supplemented header in the beginning of the file
|
||||
fseek(fptr, 0, SEEK_SET);
|
||||
res = (int)fwrite(&hdrTemp, sizeof(hdrTemp), 1, fptr);
|
||||
|
||||
@ -75,6 +75,14 @@ typedef struct
|
||||
short bits_per_sample;
|
||||
} WavFormat;
|
||||
|
||||
/// WAV audio file 'fact' section header
|
||||
typedef struct
|
||||
{
|
||||
char fact_field[4];
|
||||
int fact_len;
|
||||
uint fact_sample_len;
|
||||
} WavFact;
|
||||
|
||||
/// WAV audio file 'data' section header
|
||||
typedef struct
|
||||
{
|
||||
@ -88,6 +96,7 @@ typedef struct
|
||||
{
|
||||
WavRiff riff;
|
||||
WavFormat format;
|
||||
WavFact fact;
|
||||
WavData data;
|
||||
} WavHeader;
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user