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Bink version 'b' audio decoder

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Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
(cherry picked from commit ccfcddb3f2)
This commit is contained in:
Peter Ross 2011-02-20 12:25:05 +11:00 committed by Michael Niedermayer
parent 8d09fc1930
commit 4913af0cd3
3 changed files with 19 additions and 7 deletions
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2
Changelog
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@ -76,7 +76,7 @@ version <next>:
- IVF muxer added
- Wing Commander IV movies decoder added
- movie source added
- Bink version 'b' video decoder
- Bink version 'b' audio and video decoder
version 0.6:

2
libavcodec/avcodec.h
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@ -33,7 +33,7 @@
#define LIBAVCODEC_VERSION_MAJOR 52
#define LIBAVCODEC_VERSION_MINOR 113
#define LIBAVCODEC_VERSION_MICRO 1
#define LIBAVCODEC_VERSION_MICRO 2
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \

22
libavcodec/binkaudio.c
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@ -1,6 +1,6 @@
/*
* Bink Audio decoder
* Copyright (c) 2007-2010 Peter Ross (pross@xvid.org)
* Copyright (c) 2007-2011 Peter Ross (pross@xvid.org)
* Copyright (c) 2009 Daniel Verkamp (daniel@drv.nu)
*
* This file is part of FFmpeg.
@ -34,6 +34,7 @@
#include "dsputil.h"
#include "fft.h"
#include "fmtconvert.h"
#include "libavutil/intfloat_readwrite.h"
extern const uint16_t ff_wma_critical_freqs[25];
@ -44,6 +45,7 @@ typedef struct {
GetBitContext gb;
DSPContext dsp;
FmtConvertContext fmt_conv;
int version_b; ///< Bink version 'b'
int first;
int channels;
int frame_len; ///< transform size (samples)
@ -87,11 +89,14 @@ static av_cold int decode_init(AVCodecContext *avctx)
return -1;
}
s->version_b = avctx->codec_tag == MKTAG('B','I','K','b');
if (avctx->codec->id == CODEC_ID_BINKAUDIO_RDFT) {
// audio is already interleaved for the RDFT format variant
sample_rate *= avctx->channels;
s->channels = 1;
frame_len_bits += av_log2(avctx->channels);
if (!s->version_b)
frame_len_bits += av_log2(avctx->channels);
} else {
s->channels = avctx->channels;
}
@ -162,8 +167,13 @@ static void decode_block(BinkAudioContext *s, short *out, int use_dct)
for (ch = 0; ch < s->channels; ch++) {
FFTSample *coeffs = s->coeffs_ptr[ch];
coeffs[0] = get_float(gb) * s->root;
coeffs[1] = get_float(gb) * s->root;
if (s->version_b) {
coeffs[0] = av_int2flt(get_bits(gb, 32)) * s->root;
coeffs[1] = av_int2flt(get_bits(gb, 32)) * s->root;
} else {
coeffs[0] = get_float(gb) * s->root;
coeffs[1] = get_float(gb) * s->root;
}
for (i = 0; i < s->num_bands; i++) {
/* constant is result of 0.066399999/log10(M_E) */
@ -177,7 +187,9 @@ static void decode_block(BinkAudioContext *s, short *out, int use_dct)
// parse coefficients
i = 2;
while (i < s->frame_len) {
if (get_bits1(gb)) {
if (s->version_b) {
j = i + 16;
} else if (get_bits1(gb)) {
j = i + rle_length_tab[get_bits(gb, 4)] * 8;
} else {
j = i + 8;