Introduce WMACoef typedef for decoded coefficients

and change default type to float so that the run level
decoding functionality can be shared with wmapro

Originally committed as revision 19231 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/wma.c

@@ -444,12 +444,12 @@ int ff_wma_end(AVCodecContext *avctx)
 int ff_wma_run_level_decode(AVCodecContext* avctx, GetBitContext* gb,
                             VLC *vlc,
                             const uint16_t *level_table, const uint16_t *run_table,
-                            int version, int16_t *ptr, int offset,
+                            int version, WMACoef *ptr, int offset,
                             int num_coefs, int block_len, int frame_len_bits,
                             int coef_nb_bits)
 {
     int code, run, level, sign;
-    int16_t* eptr = ptr + num_coefs;
+    WMACoef* eptr = ptr + num_coefs;
     for(;;) {
         code = get_vlc2(gb, vlc->table, VLCBITS, VLCMAX);
         if (code < 0)

libavcodec/wma.h

@@ -51,6 +51,8 @@
 #define VLCBITS 9
 #define VLCMAX ((22+VLCBITS-1)/VLCBITS)
 
+typedef float WMACoef;          ///< type for decoded coefficients, int16_t would be enough for wma 1/2
+
 typedef struct CoefVLCTable {
     int n;                      ///< total number of codes
     int max_level;
@@ -111,7 +113,7 @@ typedef struct WMACodecContext {
     int exponents_bsize[MAX_CHANNELS];      ///< log2 ratio frame/exp. length
     DECLARE_ALIGNED_16(float, exponents[MAX_CHANNELS][BLOCK_MAX_SIZE]);
     float max_exponent[MAX_CHANNELS];
-    int16_t coefs1[MAX_CHANNELS][BLOCK_MAX_SIZE];
+    WMACoef coefs1[MAX_CHANNELS][BLOCK_MAX_SIZE];
     DECLARE_ALIGNED_16(float, coefs[MAX_CHANNELS][BLOCK_MAX_SIZE]);
     DECLARE_ALIGNED_16(FFTSample, output[BLOCK_MAX_SIZE * 2]);
     MDCTContext mdct_ctx[BLOCK_NB_SIZES];
@@ -151,7 +153,7 @@ int ff_wma_end(AVCodecContext *avctx);
 int ff_wma_run_level_decode(AVCodecContext* avctx, GetBitContext* gb,
                             VLC *vlc,
                             const uint16_t *level_table, const uint16_t *run_table,
-                            int version, int16_t *ptr, int offset,
+                            int version, WMACoef *ptr, int offset,
                             int num_coefs, int block_len, int frame_len_bits,
                             int coef_nb_bits);
 

libavcodec/wmadec.c

@@ -486,12 +486,12 @@ static int wma_decode_block(WMACodecContext *s)
     for(ch = 0; ch < s->nb_channels; ch++) {
         if (s->channel_coded[ch]) {
             int tindex;
-            int16_t* ptr = &s->coefs1[ch][0];
+            WMACoef* ptr = &s->coefs1[ch][0];
 
             /* special VLC tables are used for ms stereo because
                there is potentially less energy there */
             tindex = (ch == 1 && s->ms_stereo);
-            memset(ptr, 0, s->block_len * sizeof(int16_t));
+            memset(ptr, 0, s->block_len * sizeof(WMACoef));
             ff_wma_run_level_decode(s->avctx, &s->gb, &s->coef_vlc[tindex],
                   s->level_table[tindex], s->run_table[tindex],
                   0, ptr, 0, nb_coefs[ch],
@@ -514,7 +514,7 @@ static int wma_decode_block(WMACodecContext *s)
     /* finally compute the MDCT coefficients */
     for(ch = 0; ch < s->nb_channels; ch++) {
         if (s->channel_coded[ch]) {
-            int16_t *coefs1;
+            WMACoef *coefs1;
             float *coefs, *exponents, mult, mult1, noise;
             int i, j, n, n1, last_high_band, esize;
             float exp_power[HIGH_BAND_MAX_SIZE];

libavcodec/wmaenc.c

@@ -186,7 +186,7 @@ static int encode_block(WMACodecContext *s, float (*src_coefs)[BLOCK_MAX_SIZE],
 
     for(ch = 0; ch < s->nb_channels; ch++) {
         if (s->channel_coded[ch]) {
-            int16_t *coefs1;
+            WMACoef *coefs1;
             float *coefs, *exponents, mult;
             int i, n;
 
@@ -264,7 +264,7 @@ static int encode_block(WMACodecContext *s, float (*src_coefs)[BLOCK_MAX_SIZE],
     for(ch = 0; ch < s->nb_channels; ch++) {
         if (s->channel_coded[ch]) {
             int run, tindex;
-            int16_t *ptr, *eptr;
+            WMACoef *ptr, *eptr;
             tindex = (ch == 1 && s->ms_stereo);
             ptr = &s->coefs1[ch][0];
             eptr = ptr + nb_coefs[ch];