X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fac3dec.c;h=4b277296d159fcbd24ca95e9d6bc5f19b48e62b5;hb=0a23067ab41326dfa1da41d18923ea8547a51ff5;hp=503db5e2013af236bde4e8512ca32614b4c1781f;hpb=78d7d8fe9170f38ee0b2ab6f731ff1a61c712db5;p=ffmpeg

diff --git a/libavcodec/ac3dec.c b/libavcodec/ac3dec.c
index 503db5e2013..4b277296d15 100644
--- a/libavcodec/ac3dec.c
+++ b/libavcodec/ac3dec.c
@@ -176,6 +176,11 @@ static av_cold int ac3_decode_init(AVCodecContext *avctx)
     AC3DecodeContext *s = avctx->priv_data;
     s->avctx = avctx;
 
+#if FF_API_DRC_SCALE
+    if (avctx->drc_scale)
+        s->drc_scale = avctx->drc_scale;
+#endif
+
     ff_ac3_common_init();
     ac3_tables_init();
     ff_mdct_init(&s->imdct_256, 8, 1, 1.0);
@@ -500,9 +505,9 @@ static void ac3_decode_transform_coeffs_ch(AC3DecodeContext *s, int ch_index, ma
                 mantissa = b5_mantissas[get_bits(gbc, 4)];
                 break;
             default: /* 6 to 15 */
-                mantissa = get_bits(gbc, quantization_tab[bap]);
                 /* Shift mantissa and sign-extend it. */
-                mantissa = (mantissa << (32-quantization_tab[bap]))>>8;
+                mantissa = get_sbits(gbc, quantization_tab[bap]);
+                mantissa <<= 24 - quantization_tab[bap];
                 break;
         }
         coeffs[freq] = mantissa >> exps[freq];
@@ -788,7 +793,7 @@ static int decode_audio_block(AC3DecodeContext *s, int blk)
     do {
         if(get_bits1(gbc)) {
             s->dynamic_range[i] = ((dynamic_range_tab[get_bits(gbc, 8)]-1.0) *
-                                  s->avctx->drc_scale)+1.0;
+                                  s->drc_scale)+1.0;
         } else if(blk == 0) {
             s->dynamic_range[i] = 1.0f;
         }
@@ -1458,7 +1463,7 @@ static const AVOption options[] = {
 };
 
 static const AVClass ac3_decoder_class = {
-    .class_name = "(E-)AC3 decoder",
+    .class_name = "AC3 decoder",
     .item_name  = av_default_item_name,
     .option     = options,
     .version    = LIBAVUTIL_VERSION_INT,
@@ -1480,6 +1485,12 @@ AVCodec ff_ac3_decoder = {
 };
 
 #if CONFIG_EAC3_DECODER
+static const AVClass eac3_decoder_class = {
+    .class_name = "E-AC3 decoder",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
 AVCodec ff_eac3_decoder = {
     .name = "eac3",
     .type = AVMEDIA_TYPE_AUDIO,
@@ -1492,6 +1503,6 @@ AVCodec ff_eac3_decoder = {
     .sample_fmts = (const enum AVSampleFormat[]) {
         AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE
     },
-    .priv_class = &ac3_decoder_class,
+    .priv_class = &eac3_decoder_class,
 };
 #endif