+/* 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 */
- 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;
+#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);
+extern const UINT16 mpa_bitrate_tab[2][3][15];
+extern 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];