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2009-01-03pcm: use GLib instead of utils.hMax Kellermann1-9/+8
2009-01-03pcm_utils: use the custom PRNG for volume ditheringMax Kellermann1-1/+7
Don't use libc's rand() function, because it is slow. Our own trivial linear congruential generator is good enough for dithering.
2008-12-29pcm: use GLib loggingMax Kellermann1-7/+9
2008-12-24pcm_utils: check pcm_convert()==0Max Kellermann1-4/+0
It is illegal to pass an empty audio buffer around. pcm_resample() sometimes seems to result in 0 samples, maybe related to libsamplerate. To work around that problem, add special checks after both pcm_convert() invocations. Removed the pcm_resample()==0 checks from pcm_convert().
2008-12-08pcm_utils: always round up resampling buffer sizeMax Kellermann1-1/+1
libsamplerate produces cracks in the sound output when the destination buffer is too small. This is the case when pcm_convert_size() rounds down. Use ceil(x) instead of floor(0.5+x) there to prevent a buffer overrun.
2008-12-02replaced mpd_likely/mpd_unlikely by G_LIKELY/G_UNLIKELYThomas Jansen1-2/+3
We want to remove gcc.h eventually. This takes care of all the G_LIKELY/G_UNLIKELY macros.
2008-11-11pcm_utils: allow volume levels greater than 100% in pcm_volume()Max Kellermann1-1/+1
Allow pcm_volume() to increase volume.
2008-11-11pcm_volume: added constant PCM_VOLUME_1Max Kellermann1-10/+13
It may be desirable to change the range of integer volume levels (e.g. to 1024, which may utilize shifts instead of expensive integer divisions). Introduce the constant PCM_VOLUME_1 which describes the integer value for "100% volume". This is currently 1000.
2008-10-23pcm_utils: added 24 bit conversion functionsMax Kellermann1-0/+108
24 bit output is as important as 16 bit output. Provide a pcm_convert() implementation which can convert to 24 bit with as little quality loss as possible.
2008-10-23pcm_utils: generic pcm_convert_size() implementationMax Kellermann1-21/+2
The old pcm_convert_size() ignored most of the destination format, e.g. it did not check its sample size, and assumed it is 16 bit. Simplify and universalize it by using audio_format_frame_size().
2008-10-23pcm_utils: moved code to pcm_convert_16()Max Kellermann1-21/+39
pcm_convert() converted only to 16 bit. To be able to support other sample sizes, move that 16 bit specific code to a separate function.
2008-10-23pcm_utils: moved channel conversion functions to pcm_channels.cMax Kellermann1-82/+4
Separate code from pcm_utils.c to keep it small and simple.
2008-10-23pcm_utils: moved code to pcm_resample.cMax Kellermann1-162/+6
Separate the resampling code from the rest of pcm_utils.c. Create two sub-libraries: pcm_resample_libsamplerate.c and pcm_resample_fallback.c.
2008-10-23pcm_dither: added generic 24 to 16 bit ditheringMax Kellermann1-8/+10
Copied and adapted code from the mp3 decoder plugin. This library now replaces the old and low-quality function pcm_convert_24_to_16().
2008-10-23output_buffer: don't split framesMax Kellermann1-0/+3
Splitting a frame between two buffer chunks causes distortion in the output. MPD used to assume that the chunk size 1020 would never cause splitted frames, but that isn't the case for 24 bit stereo (127.5 frames), and even less for files with even more channels.
2008-10-21pcm_utils: added pcm_convert_init()Max Kellermann1-0/+5
Instead of manually calling memset(0) on the pcm_convert_state struct, client code should use a library function from pcm_utils.c. This way, we can change the semantics of the struct easily.
2008-10-21pcm_utils: no CamelCaseMax Kellermann1-64/+63
Renamed all functions which were still in CamelCase.
2008-10-21pcm_utils: renamed ConvState to struct pcm_convert_stateMax Kellermann1-3/+5
No CamelCase, and a struct instead of a typedef.
2008-10-12pcm_utils: support any number of channels in pcm_sizeOfConvBuffer()Max Kellermann1-11/+2
When calculating the conversion buffer size, don't hard-code the formulas for only mono<->stereo.
2008-10-12pcm_utils: support converting N channels to stereoMax Kellermann1-0/+26
Convert any number of channels to stereo. In fact, this isn't really stereo, it's rater mono blown up to stereo. This patch should only make it possible to play 5.1 files at all; "real" conversion to stereo should be implemented, but for now, this is better than nothing.
2008-10-12pcm_utils: pass output channel count to pcm_convertChannels()Max Kellermann1-35/+22
In order to be able to deal with non-trivial conversions, pcm_convertChannels() needs to know both the input and the output channel count. Simplify buffer allocation in that function.
2008-10-12pcm_utils: moved code from pcm_convertChannels() to separate functionsMax Kellermann1-20/+32
Moved code from pcm_convertChannels() to pcm_convert_channels_1_to_2() and pcm_convert_channels_2_to_1(). Improved the quality of pcm_convert_channels_2_to_1() by calculating the arithmetic mean value of both samples.
2008-10-12pcm_utils: pass int16_t* where appropriateMax Kellermann1-12/+15
Pass int16_t pointers instead of char pointers to functions which can deal with 16 bit audio only.
2008-10-10audio_format: renamed sampleRate to sample_rateMax Kellermann1-5/+5
The last bit of CamelCase in audio_format.h. Additionally, rename a bunch of local variables.
2008-10-10audio_format: unsigned integersMax Kellermann1-3/+3
"bits" and "channels" cannot be negative.
2008-10-09pcm: fix const flac in pcm_convertSampleRate()Max Kellermann1-1/+1
In the libsamplerate fallback code, a "const" attribute was missing.
2008-10-09pcm: fixed software volume, broken by unsigned integerMax Kellermann1-6/+3
"volume" was passed as an unsigned integer, which is correct. It's just that when it was multiplied with the sample value, the whole operation was changed to unsigned, breaking the algorithm (and Qball's ears). Internally change "volume" to signed.
2008-10-08don't include os_compat.hMax Kellermann1-1/+4
When there are standardized headers, use these instead of the bloated os_compat.h.
2008-09-29pcm_utils: 24 bit supportMax Kellermann1-0/+67
Add support for 24 bit PCM samples to all functions. Note that pcm_convertAudioFormat() converts 24 bit samples to 16 bit; to preserve full quality, support for "real" 24 bit conversion should be added.
2008-09-29pcm_utils: moved code to special 8/16 bit functionsMax Kellermann1-72/+93
Moved code into separate bit specific functions: - pcm_volumeChange() -> pcm_volume_change_X() - pcm_add() -> pcm_add_X() - pcm_convertTo16bit() -> pcm_convert_8_to_16()
2008-09-29pcm_utils: pass only one buffer size to pcm_mix()Max Kellermann1-17/+9
pcm_mix() might overflow the destination buffer if it is smaller than the second buffer. This is ok because the physical buffer size passed by cross_fade_apply() is always big enough, but clutters pcm_mix() with complicated length checks and contains a dangerous buffer overflow pitfall. Simplify pcm_mix()/pcm_add() and pass only the smaller buffer size; let cross_fade_apply() do the memcpy().
2008-09-29assume stdint.h and stddef.h are availableMax Kellermann1-2/+0
Since we use a C99 compiler now, we can assert that the C99 standard headers are available, no need for complicated compile time checks. Kill mpd_types.h.
2008-09-29Switch to C99 types (retaining compat with old compilers)Eric Wong1-32/+32
Seeing the "mpd_" prefix _everywhere_ is mind-numbing as the mind needs to retrain itself to skip over the first 4 tokens of a type to get to its meaning. So avoid having extra characters on my terminal to make it easier to follow code at 2:30 am in the morning. Please report any new issues you may come across on Free toolchains. I realize how difficult it can be to build/maintain cross-compiling toolchains and I have no intention of forcing people to upgrade their toolchains to build mpd. Tested with gcc 2.95.4 and and gcc 4.3.1 on x86-32.
2008-09-28pcm_utils: added pcm_range()Max Kellermann1-10/+18
Make the code more readable by moving the range checks to pcm_range(). gcc does quite a good job at optimizing it: the resulting binary is exactly the same, although it contains a parametrized shift instead of hard-coded boundaries.
2008-09-28pcm_utils: added inline function pcm_dither()Max Kellermann1-8/+10
Merge some code into an inline function, so we can optimize it later only once.
2008-09-07audio_format: converted typedef AudioFormat to struct audio_formatMax Kellermann1-7/+10
Get rid of CamelCase, and don't use a typedef, so we can forward-declare it, and unclutter the include dependencies.
2008-09-07fix -Wcast-qual -Wwrite-strings warningsMax Kellermann1-9/+10
The previous patch enabled these warnings. In Eric's branch, they were worked around with a generic deconst_ptr() function. There are several places where we can add "const" to pointers, and in others, libraries want non-const strings. In the latter, convert string literals to "static char[]" variables - this takes the same space, and seems safer than deconsting a string literal.
2008-08-26enable -Wpointer-arith, -Wstrict-prototypesMax Kellermann1-2/+4
Also enable -Wunused-parameter - this forces us to add the gcc "unused" attribute to a lot of parameters (mostly library callback functions), but it's worth it during code refactorizations.
2008-04-15more const pointers in pcm_utils.[ch]Max Kellermann1-3/+4
git-svn-id: https://svn.musicpd.org/mpd/trunk@7360 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2008-04-12decode: fix some uninitialized variable warningsEric Wong1-1/+1
They're probably not needed, but less noise => faster debugging git-svn-id: https://svn.musicpd.org/mpd/trunk@7302 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2008-04-12missing const in disabled code pathMax Kellermann1-1/+1
git-svn-id: https://svn.musicpd.org/mpd/trunk@7298 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2008-04-12constant pointersMax Kellermann1-5/+5
There were some const pointers missing in the previous const-cleanup patch. git-svn-id: https://svn.musicpd.org/mpd/trunk@7290 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2008-04-12use constant pointers when possibleMax Kellermann1-13/+12
It is a good practice to constify pointers when their dereferenced data is not modified within the functions or its descendants. git-svn-id: https://svn.musicpd.org/mpd/trunk@7234 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2008-03-26use size_tMax Kellermann1-1/+1
When dealing with in-memory lengths, the standard type "size_t" should be used. Missing one can be quite dangerous, because an attacker could provoke an integer under-/overflow, which may provide an attack vector. git-svn-id: https://svn.musicpd.org/mpd/trunk@7205 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2008-01-03Cleanup #includes of standard system headers and put them in one placeEric Wong1-4/+1
This will make refactoring features easier, especially now that pthreads support and larger refactorings are on the horizon. Hopefully, this will make porting to other platforms (even non-UNIX-like ones for masochists) easier, too. os_compat.h will house all the #includes for system headers considered to be the "core" of MPD. Headers for optional features will be left to individual source files. git-svn-id: https://svn.musicpd.org/mpd/trunk@7130 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2007-09-10pcm_utils: gcc 2.95 compile fix (extra semi-colon)Eric Wong1-1/+1
git-svn-id: https://svn.musicpd.org/mpd/trunk@6872 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2007-05-26Changing all calls to ERROR() followed by exit(EXIT_FAILURE) with a singleJ. Alexander Treuman1-8/+4
call to FATAL(). git-svn-id: https://svn.musicpd.org/mpd/trunk@6276 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2007-05-26Cleaning up pcm_getSampleRateConverter.J. Alexander Treuman1-23/+27
git-svn-id: https://svn.musicpd.org/mpd/trunk@6275 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2007-05-26Exit with an error if channel count isn't 1 or 2.J. Alexander Treuman1-0/+4
git-svn-id: https://svn.musicpd.org/mpd/trunk@6274 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2007-05-26Make pcm_convertAudioFormat return the buffer size. This is necessaryJ. Alexander Treuman1-17/+20
because lsr may return less than the input buffer size, and the rest of the audio code needs to know the new size. This fixes the clicking that was introduced with recent changes to the lsr code. A huge thanks to remiss for figuring this out. git-svn-id: https://svn.musicpd.org/mpd/trunk@6273 09075e82-0dd4-0310-85a5-a0d7c8717e4f