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add support for blocksize 64

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fixes issue 2537 and 2538

Originally committed as revision 26328 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Sascha Sommer 2011-01-14 16:36:57 +00:00
parent b070bcfe8a
commit 75e4efd2a7
1 changed files with 6 additions and 5 deletions
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11
libavcodec/wmaprodec.c
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@ -100,9 +100,10 @@
#define MAX_BANDS 29 ///< max number of scale factor bands
#define MAX_FRAMESIZE 32768 ///< maximum compressed frame size
#define WMAPRO_BLOCK_MIN_BITS 6 ///< log2 of min block size
#define WMAPRO_BLOCK_MAX_BITS 12 ///< log2 of max block size
#define WMAPRO_BLOCK_MAX_SIZE (1 << WMAPRO_BLOCK_MAX_BITS) ///< maximum block size
#define WMAPRO_BLOCK_SIZES (WMAPRO_BLOCK_MAX_BITS - BLOCK_MIN_BITS + 1) ///< possible block sizes
#define WMAPRO_BLOCK_SIZES (WMAPRO_BLOCK_MAX_BITS - WMAPRO_BLOCK_MIN_BITS + 1) ///< possible block sizes
#define VLCBITS 9
@ -417,8 +418,8 @@ static av_cold int decode_init(AVCodecContext *avctx)
/** init MDCT, FIXME: only init needed sizes */
for (i = 0; i < WMAPRO_BLOCK_SIZES; i++)
ff_mdct_init(&s->mdct_ctx[i], BLOCK_MIN_BITS+1+i, 1,
1.0 / (1 << (BLOCK_MIN_BITS + i - 1))
ff_mdct_init(&s->mdct_ctx[i], WMAPRO_BLOCK_MIN_BITS+1+i, 1,
1.0 / (1 << (WMAPRO_BLOCK_MIN_BITS + i - 1))
/ (1 << (s->bits_per_sample - 1)));
/** init MDCT windows: simple sinus window */
@ -1021,7 +1022,7 @@ static void wmapro_window(WMAProDecodeCtx *s)
winlen = s->subframe_len;
}
window = s->windows[av_log2(winlen) - BLOCK_MIN_BITS];
window = s->windows[av_log2(winlen) - WMAPRO_BLOCK_MIN_BITS];
winlen >>= 1;
@ -1233,7 +1234,7 @@ static int decode_subframe(WMAProDecodeCtx *s)
}
/** apply imdct (ff_imdct_half == DCTIV with reverse) */
ff_imdct_half(&s->mdct_ctx[av_log2(subframe_len) - BLOCK_MIN_BITS],
ff_imdct_half(&s->mdct_ctx[av_log2(subframe_len) - WMAPRO_BLOCK_MIN_BITS],
s->channel[c].coeffs, s->tmp);
}
}