From 2456e28d9139fc6b2fee59dd058ad83a7e2f3416 Mon Sep 17 00:00:00 2001
From: Fabrice Bellard <fabrice@bellard.org>
Date: Sat, 15 Sep 2001 22:42:25 +0000
Subject: merged code and tables between encoder and decoder

Originally committed as revision 119 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/mpegaudio.h | 45 +++++++++++++++++++--------------------------
 1 file changed, 19 insertions(+), 26 deletions(-)

(limited to 'libavcodec/mpegaudio.h')

diff --git a/libavcodec/mpegaudio.h b/libavcodec/mpegaudio.h
index 9d5fdfb011..7dc206a1e6 100644
--- a/libavcodec/mpegaudio.h
+++ b/libavcodec/mpegaudio.h
@@ -1,34 +1,27 @@
+/* mpeg audio declarations for both encoder and decoder */
+
+/* max frame size, in samples */
+#define MPA_FRAME_SIZE 1152 
 
 /* max compressed frame size */
-#define MPA_MAX_CODED_FRAME_SIZE 1200
+#define MPA_MAX_CODED_FRAME_SIZE 1792
 
-#define MPA_FRAME_SIZE 1152 
 #define MPA_MAX_CHANNELS 2
 
-#define SAMPLES_BUF_SIZE 4096
 #define SBLIMIT 32 /* number of subbands */
-#define DCT_BITS 14 /* number of bits for the DCT */
-#define MUL(a,b) (((a) * (b)) >> DCT_BITS)
-#define FIX(a)   ((int)((a) * (1 << DCT_BITS)))
 
-typedef struct MpegAudioContext {
-    PutBitContext pb;
-    int nb_channels;
-    int freq, bit_rate;
-    int lsf;           /* 1 if mpeg2 low bitrate selected */
-    int bitrate_index; /* bit rate */
-    int freq_index;
-    int frame_size; /* frame size, in bits, without padding */
-    INT64 nb_samples; /* total number of samples encoded */
-    /* padding computation */
-    int frame_frac, frame_frac_incr, do_padding;
-    short samples_buf[MPA_MAX_CHANNELS][SAMPLES_BUF_SIZE]; /* buffer for filter */
-    int samples_offset[MPA_MAX_CHANNELS];       /* offset in samples_buf */
-    int sb_samples[MPA_MAX_CHANNELS][3][12][SBLIMIT];
-    unsigned char scale_factors[MPA_MAX_CHANNELS][SBLIMIT][3]; /* scale factors */
-    /* code to group 3 scale factors */
-    unsigned char scale_code[MPA_MAX_CHANNELS][SBLIMIT];       
-    int sblimit; /* number of used subbands */
-    const unsigned char *alloc_table;
-} MpegAudioContext;
+#define MPA_STEREO  0
+#define MPA_JSTEREO 1
+#define MPA_DUAL    2
+#define MPA_MONO    3
+
+int l2_select_table(int bitrate, int nb_channels, int freq, int lsf);
 
+const UINT16 mpa_bitrate_tab[2][3][15];
+const UINT16 mpa_freq_tab[3];
+extern const unsigned char *alloc_tables[5];
+extern const double enwindow[512];
+extern const int sblimit_table[5];
+extern const int quant_steps[17];
+extern const int quant_bits[17];
+extern const INT32 mpa_enwindow[257];
-- 
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