From de6d9b6404bfd1c589799142da5a95428f146edd Mon Sep 17 00:00:00 2001
From: Fabrice Bellard <fabrice@bellard.org>
Date: Sun, 22 Jul 2001 14:18:56 +0000
Subject: Initial revision

Originally committed as revision 5 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/mpegaudio.h | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 libavcodec/mpegaudio.h

(limited to 'libavcodec/mpegaudio.h')

diff --git a/libavcodec/mpegaudio.h b/libavcodec/mpegaudio.h
new file mode 100644
index 0000000000..006650a99c
--- /dev/null
+++ b/libavcodec/mpegaudio.h
@@ -0,0 +1,34 @@
+
+/* max compressed frame size */
+#define MPA_MAX_CODED_FRAME_SIZE 1200
+
+#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 */
+    long long 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;
+
-- 
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