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author | anders <anders@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-12-28 13:59:53 +0000 |
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committer | anders <anders@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-12-28 13:59:53 +0000 |
commit | 6adaa78ee935ef89439d4b38550165f13e880320 (patch) | |
tree | 6612adc09121e661363b1370cb43981007d36b60 /libaf/af_tools.c | |
parent | 0e9c0e8aa2aa7df6aad5d78c4b664927a9d2421e (diff) | |
download | mpv-6adaa78ee935ef89439d4b38550165f13e880320.tar.bz2 mpv-6adaa78ee935ef89439d4b38550165f13e880320.tar.xz |
Changes includes:
- Improved runtime control system
- 3 New filter panning, compressor/limiter and a noise gate
- The compressor/limiter and the noise gate are not yet finished
- The panning filter does combined mixing and channel routing and
can be used to down-mix from stereo to mono (for example)
- Improvements to volume and channel
- volume now has a very good soft clipping using sin()
- channel can handle generic routing of audio data
- Conversion of all filters to handle floating point data
- Cleanup of message printing
- Fix for the sig 11 bug reported by Denes
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@8608 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'libaf/af_tools.c')
-rw-r--r-- | libaf/af_tools.c | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/libaf/af_tools.c b/libaf/af_tools.c new file mode 100644 index 0000000000..6c2111f981 --- /dev/null +++ b/libaf/af_tools.c @@ -0,0 +1,79 @@ +#include <math.h> +#include <af.h> + +/* Convert to gain value from dB. Returns AF_OK if of and AF_ERROR if + fail */ +inline int af_from_dB(int n, float* in, float* out, float k, float mi, float ma) +{ + int i = 0; + // Sanity check + if(!in || !out) + return AF_ERROR; + + for(i=0;i<n;i++){ + if(in[i]<=-200) + out[i]=0.0; + else + out[i]=pow(10.0,clamp(in[i],mi,ma)/k); + } + return AF_OK; +} + +/* Convert from gain value to dB. Returns AF_OK if of and AF_ERROR if + fail */ +inline int af_to_dB(int n, float* in, float* out, float k) +{ + int i = 0; + // Sanity check + if(!in || !out) + return AF_ERROR; + + for(i=0;i<AF_NCH;i++){ + if(in[i] == 0.0) + out[i]=-200.0; + else + out[i]=k*log10(in[i]); + } + return AF_OK; +} + +/* Convert from ms to sample time*/ +inline int af_from_ms(int n, float* in, float* out, int rate, float mi, float ma) +{ + int i = 0; + // Sanity check + if(!in || !out) + return AF_ERROR; + + for(i=0;i<AF_NCH;i++) + out[i]=clamp(in[i],ma,mi); + + return AF_OK; +} + +/* Convert from sample time to ms */ +inline int af_to_ms(int n, float* in, float* out, int rate) +{ + int i = 0; + // Sanity check + if(!in || !out) + return AF_ERROR; + + for(i=0;i<AF_NCH;i++) + out[i]=in[i]; + + return AF_OK; +} + +/* Helper function for testing the output format */ +inline int af_test_output(struct af_instance_s* af, af_data_t* out) +{ + if((af->data->format != out->format) || + (af->data->bps != out->bps) || + (af->data->rate != out->rate) || + (af->data->nch != out->nch)){ + memcpy(out,af->data,sizeof(af_data_t)); + return AF_FALSE; + } + return AF_OK; +} |