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lavf/showspectrum: fix unaligned rdft data.

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This commit is contained in:
Clément Bœsch 2012-10-26 18:42:54 +02:00
parent 2ef26b5e73
commit 6078bd8024
1 changed files with 8 additions and 4 deletions
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12
libavfilter/avf_showspectrum.c
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@ -132,16 +132,20 @@ static int config_output(AVFilterLink *outlink)
/* (re-)configuration if the video output changed (or first init) */
if (rdft_bits != showspectrum->rdft_bits) {
size_t rdft_size;
AVFilterBufferRef *outpicref;
av_rdft_end(showspectrum->rdft);
showspectrum->rdft = av_rdft_init(rdft_bits, DFT_R2C);
showspectrum->rdft_bits = rdft_bits;
/* RDFT buffers: x2 for each (display) channel buffer */
showspectrum->rdft_data =
av_realloc_f(showspectrum->rdft_data, 2 * win_size,
sizeof(*showspectrum->rdft_data));
/* RDFT buffers: x2 for each (display) channel buffer.
* Note: we use free and malloc instead of a realloc-like function to
* make sure the buffer is aligned in memory for the FFT functions. */
av_freep(&showspectrum->rdft_data);
if (av_size_mult(sizeof(*showspectrum->rdft_data), 2 * win_size, &rdft_size) < 0)
return AVERROR(EINVAL);
showspectrum->rdft_data = av_malloc(rdft_size);
if (!showspectrum->rdft_data)
return AVERROR(ENOMEM);
showspectrum->filled = 0;