diff options
author | Måns Rullgård <mans@mansr.com> | 2010-03-21 00:27:06 +0300 |
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committer | Måns Rullgård <mans@mansr.com> | 2010-03-21 00:27:06 +0300 |
commit | 1366f0597853fc7986b51ee95d6dddc875ac9015 (patch) | |
tree | 5e82bb3553083b1350012f6377fe5a87e60dcdb9 /libavcodec | |
parent | 2881c83127c680defd1d596200897dd6b6db7977 (diff) |
rdft: reorder functions to avoid static prototype
Originally committed as revision 22610 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec')
-rw-r--r-- | libavcodec/rdft.c | 58 |
1 files changed, 28 insertions, 30 deletions
diff --git a/libavcodec/rdft.c b/libavcodec/rdft.c index 0bab696f82..29fedc8767 100644 --- a/libavcodec/rdft.c +++ b/libavcodec/rdft.c @@ -50,36 +50,6 @@ SINTABLE_CONST FFTSample * const ff_sin_tabs[] = { ff_sin_2048, ff_sin_4096, ff_sin_8192, ff_sin_16384, ff_sin_32768, ff_sin_65536, }; -static void ff_rdft_calc_c(RDFTContext* s, FFTSample* data); - -av_cold int ff_rdft_init(RDFTContext *s, int nbits, enum RDFTransformType trans) -{ - int n = 1 << nbits; - int i; - const double theta = (trans == DFT_R2C || trans == DFT_C2R ? -1 : 1)*2*M_PI/n; - - s->nbits = nbits; - s->inverse = trans == IDFT_C2R || trans == DFT_C2R; - s->sign_convention = trans == IDFT_R2C || trans == DFT_C2R ? 1 : -1; - - if (nbits < 4 || nbits > 16) - return -1; - - if (ff_fft_init(&s->fft, nbits-1, trans == IDFT_C2R || trans == IDFT_R2C) < 0) - return -1; - - ff_init_ff_cos_tabs(nbits); - s->tcos = ff_cos_tabs[nbits]; - s->tsin = ff_sin_tabs[nbits]+(trans == DFT_R2C || trans == DFT_C2R)*(n>>2); -#if !CONFIG_HARDCODED_TABLES - for (i = 0; i < (n>>2); i++) { - s->tsin[i] = sin(i*theta); - } -#endif - s->rdft_calc = ff_rdft_calc_c; - return 0; -} - /** Map one real FFT into two parallel real even and odd FFTs. Then interleave * the two real FFTs into one complex FFT. Unmangle the results. * ref: http://www.engineeringproductivitytools.com/stuff/T0001/PT10.HTM @@ -126,6 +96,34 @@ static void ff_rdft_calc_c(RDFTContext* s, FFTSample* data) } } +av_cold int ff_rdft_init(RDFTContext *s, int nbits, enum RDFTransformType trans) +{ + int n = 1 << nbits; + int i; + const double theta = (trans == DFT_R2C || trans == DFT_C2R ? -1 : 1)*2*M_PI/n; + + s->nbits = nbits; + s->inverse = trans == IDFT_C2R || trans == DFT_C2R; + s->sign_convention = trans == IDFT_R2C || trans == DFT_C2R ? 1 : -1; + + if (nbits < 4 || nbits > 16) + return -1; + + if (ff_fft_init(&s->fft, nbits-1, trans == IDFT_C2R || trans == IDFT_R2C) < 0) + return -1; + + ff_init_ff_cos_tabs(nbits); + s->tcos = ff_cos_tabs[nbits]; + s->tsin = ff_sin_tabs[nbits]+(trans == DFT_R2C || trans == DFT_C2R)*(n>>2); +#if !CONFIG_HARDCODED_TABLES + for (i = 0; i < (n>>2); i++) { + s->tsin[i] = sin(i*theta); + } +#endif + s->rdft_calc = ff_rdft_calc_c; + return 0; +} + av_cold void ff_rdft_end(RDFTContext *s) { ff_fft_end(&s->fft); |