optionally (use_lpc=2) support Cholesky factorization for finding the lpc coeficients
[ffmpeg.git] / libavcodec / a52dec.c
index c9f22a9..5226325 100644 (file)
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
+
+/**
+ * @file a52dec.c
+ * A52 decoder.
+ */
+
 #include "avcodec.h"
 #include "liba52/a52.h"
 
@@ -52,11 +58,11 @@ typedef struct AC3DecodeState {
     a52_state_t* (*a52_init)(uint32_t mm_accel);
     sample_t* (*a52_samples)(a52_state_t * state);
     int (*a52_syncinfo)(uint8_t * buf, int * flags,
-                         int * sample_rate, int * bit_rate);
+                          int * sample_rate, int * bit_rate);
     int (*a52_frame)(a52_state_t * state, uint8_t * buf, int * flags,
-                      sample_t * level, sample_t bias);
+                       sample_t * level, sample_t bias);
     void (*a52_dynrng)(a52_state_t * state,
-                        sample_t (* call) (sample_t, void *), void * data);
+                         sample_t (* call) (sample_t, void *), void * data);
     int (*a52_block)(a52_state_t * state);
     void (*a52_free)(a52_state_t * state);
 
@@ -67,7 +73,7 @@ static void* dlsymm(void* handle, const char* symbol)
 {
     void* f = dlsym(handle, symbol);
     if (!f)
-       fprintf(stderr, "A52 Decoder - function '%s' can't be resolved\n", symbol);
+        av_log( NULL, AV_LOG_ERROR, "A52 Decoder - function '%s' can't be resolved\n", symbol);
     return f;
 }
 #endif
@@ -80,7 +86,7 @@ static int a52_decode_init(AVCodecContext *avctx)
     s->handle = dlopen(liba52name, RTLD_LAZY);
     if (!s->handle)
     {
-       fprintf(stderr, "A52 library %s could not be opened! \n%s\n", liba52name, dlerror());
+        av_log( avctx, AV_LOG_ERROR, "A52 library %s could not be opened! \n%s\n", liba52name, dlerror());
         return -1;
     }
     s->a52_init = (a52_state_t* (*)(uint32_t)) dlsymm(s->handle, "a52_init");
@@ -92,7 +98,7 @@ static int a52_decode_init(AVCodecContext *avctx)
     if (!s->a52_init || !s->a52_samples || !s->a52_syncinfo
         || !s->a52_frame || !s->a52_block || !s->a52_free)
     {
-       dlclose(s->handle);
+        dlclose(s->handle);
         return -1;
     }
 #else
@@ -117,22 +123,22 @@ static int a52_decode_init(AVCodecContext *avctx)
 static inline int blah (int32_t i)
 {
     if (i > 0x43c07fff)
-       return 32767;
+        return 32767;
     else if (i < 0x43bf8000)
-       return -32768;
+        return -32768;
     return i - 0x43c00000;
 }
 
 static inline void float_to_int (float * _f, int16_t * s16, int nchannels)
 {
     int i, j, c;
-    int32_t * f = (int32_t *) _f;      // XXX assumes IEEE float format
+    int32_t * f = (int32_t *) _f;       // XXX assumes IEEE float format
 
     j = 0;
     nchannels *= 256;
     for (i = 0; i < 256; i++) {
-       for (c = 0; c < nchannels; c += 256)
-           s16[j++] = blah (f[i + c]);
+        for (c = 0; c < nchannels; c += 256)
+            s16[j++] = blah (f[i + c]);
     }
 }
 
@@ -151,10 +157,9 @@ static int a52_decode_frame(AVCodecContext *avctx,
     short *out_samples = data;
     float level;
     static const int ac3_channels[8] = {
-       2, 1, 2, 3, 3, 4, 4, 5
+        2, 1, 2, 3, 3, 4, 4, 5
     };
 
-    *data_size = 0;
     buf_ptr = buf;
     while (buf_size > 0) {
         len = s->inbuf_ptr - s->inbuf;
@@ -174,20 +179,20 @@ static int a52_decode_frame(AVCodecContext *avctx,
                     memcpy(s->inbuf, s->inbuf + 1, HEADER_SIZE - 1);
                     s->inbuf_ptr--;
                 } else {
-                   s->frame_size = len;
+                    s->frame_size = len;
                     /* update codec info */
                     avctx->sample_rate = sample_rate;
                     s->channels = ac3_channels[s->flags & 7];
                     if (s->flags & A52_LFE)
-                       s->channels++;
-                   if (avctx->channels == 0)
-                       /* No specific number of channel requested */
-                       avctx->channels = s->channels;
-                   else if (s->channels < avctx->channels) {
-                       fprintf(stderr, "ac3dec: AC3 Source channels are less than specified: output to %d channels.. (frmsize: %d)\n", s->channels, len);
-                       avctx->channels = s->channels;
-                   }
-                   avctx->bit_rate = bit_rate;
+                        s->channels++;
+                    if (avctx->channels == 0)
+                        /* No specific number of channel requested */
+                        avctx->channels = s->channels;
+                    else if (s->channels < avctx->channels) {
+                        av_log(avctx, AV_LOG_ERROR, "ac3dec: AC3 Source channels are less than specified: output to %d channels.. (frmsize: %d)\n", s->channels, len);
+                        avctx->channels = s->channels;
+                    }
+                    avctx->bit_rate = bit_rate;
                 }
             }
         } else if (len < s->frame_size) {