Fixed-point support in fft-test

[ffmpeg] / libavcodec / binkaudio.c

diff --git a/libavcodec/binkaudio.c b/libavcodec/binkaudio.c
index 116bf5b7e68d520b95ebe88d901a59f5b027c564..77ce6b9d3ace21f90a65491f9059d290f9c01307 100644 (file)
--- a/libavcodec/binkaudio.c
+++ b/libavcodec/binkaudio.c
@@ -1,22 +1,22 @@
 /*
  * 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.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
@@ -32,8 +32,10 @@
 #define ALT_BITSTREAM_READER_LE
 #include "get_bits.h"
 #include "dsputil.h"
-#include "fft.h"
+#include "dct.h"
+#include "rdft.h"
 #include "fmtconvert.h"
+#include "libavutil/intfloat_readwrite.h"
 
 extern const uint16_t ff_wma_critical_freqs[25];
 
@@ -44,6 +46,7 @@ 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 +90,14 @@ 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 +168,13 @@ 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 +188,9 @@ 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;
@@ -211,11 +224,11 @@ static void decode_block(BinkAudioContext *s, short *out, int use_dct)
 
         if (CONFIG_BINKAUDIO_DCT_DECODER && use_dct) {
             coeffs[0] /= 0.5;
-            ff_dct_calc (&s->trans.dct,  coeffs);
+            s->trans.dct.dct_calc(&s->trans.dct,  coeffs);
             s->dsp.vector_fmul_scalar(coeffs, coeffs, s->frame_len / 2, s->frame_len);
         }
         else if (CONFIG_BINKAUDIO_RDFT_DECODER)
-            ff_rdft_calc(&s->trans.rdft, coeffs);
+            s->trans.rdft.rdft_calc(&s->trans.rdft, coeffs);
     }
 
     s->fmt_conv.float_to_int16_interleave(out, (const float **)s->coeffs_ptr,