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Add a window field to AC3MDCTContext and use it as an input to apply_window()

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instead of using the ff_ac3_window[] table directly.

Originally committed as revision 26172 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Justin Ruggles 2010-12-30 22:13:37 +00:00
parent b5293036b9
commit 34d5074e6d
1 changed files with 4 additions and 1 deletions
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5
libavcodec/ac3enc.c
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@ -56,6 +56,7 @@ typedef struct IComplex {
} IComplex;
typedef struct AC3MDCTContext {
const int16_t *window; ///< MDCT window function
int nbits; ///< log2(transform size)
int16_t *costab; ///< FFT cos table
int16_t *sintab; ///< FFT sin table
@ -262,6 +263,8 @@ static av_cold int mdct_init(AVCodecContext *avctx, AC3MDCTContext *mdct,
if (ret)
return ret;
mdct->window = ff_ac3_window;
FF_ALLOC_OR_GOTO(avctx, mdct->xcos1, n4 * sizeof(*mdct->xcos1), mdct_alloc_fail);
FF_ALLOC_OR_GOTO(avctx, mdct->xsin1, n4 * sizeof(*mdct->xsin1), mdct_alloc_fail);
FF_ALLOC_OR_GOTO(avctx, mdct->rot_tmp, n * sizeof(*mdct->rot_tmp), mdct_alloc_fail);
@ -498,7 +501,7 @@ static void apply_mdct(AC3EncodeContext *s)
AC3Block *block = &s->blocks[blk];
const int16_t *input_samples = &s->planar_samples[ch][blk * AC3_BLOCK_SIZE];
apply_window(s->windowed_samples, input_samples, ff_ac3_window, AC3_WINDOW_SIZE);
apply_window(s->windowed_samples, input_samples, s->mdct.window, AC3_WINDOW_SIZE);
block->exp_shift[ch] = normalize_samples(s);