Merge remote-tracking branch 'qatar/master'

[ffmpeg] / libavcodec / ac3dec.c

diff --git a/libavcodec/ac3dec.c b/libavcodec/ac3dec.c
index 5e8b36404b38781499158565eafa7a2698f52fa3..01e08ec0c5792fc85da35efcb8be31034419f45c 100644 (file)
--- a/libavcodec/ac3dec.c
+++ b/libavcodec/ac3dec.c
@@ -76,18 +76,6 @@ static const float gain_levels[9] = {
     LEVEL_MINUS_9DB
 };
 
-/**
- * Table for center mix levels
- * reference: Section 5.4.2.4 cmixlev
- */
-static const uint8_t center_levels[4] = { 4, 5, 6, 5 };
-
-/**
- * Table for surround mix levels
- * reference: Section 5.4.2.5 surmixlev
- */
-static const uint8_t surround_levels[4] = { 4, 6, 7, 6 };
-
 /**
  * Table for default stereo downmixing coefficients
  * reference: Section 7.8.2 Downmixing Into Two Channels
@@ -174,11 +162,6 @@ 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);
@@ -223,7 +206,7 @@ static int ac3_parse_header(AC3DecodeContext *s)
     int i;
 
     /* read the rest of the bsi. read twice for dual mono mode. */
-    i = !(s->channel_mode);
+    i = !s->channel_mode;
     do {
         skip_bits(gbc, 5); // skip dialog normalization
         if (get_bits1(gbc))
@@ -320,8 +303,8 @@ static int parse_frame_header(AC3DecodeContext *s)
 static void set_downmix_coeffs(AC3DecodeContext *s)
 {
     int i;
-    float cmix = gain_levels[center_levels[s->center_mix_level]];
-    float smix = gain_levels[surround_levels[s->surround_mix_level]];
+    float cmix = gain_levels[s->  center_mix_level];
+    float smix = gain_levels[s->surround_mix_level];
     float norm0, norm1;
 
     for (i = 0; i < s->fbw_channels; i++) {
@@ -792,7 +775,7 @@ static int decode_audio_block(AC3DecodeContext *s, int blk)
     }
 
     /* dynamic range */
-    i = !(s->channel_mode);
+    i = !s->channel_mode;
     do {
         if (get_bits1(gbc)) {
             s->dynamic_range[i] = ((dynamic_range_tab[get_bits(gbc, 8)] - 1.0) *
@@ -1371,7 +1354,7 @@ static int ac3_decode_frame(AVCodecContext * avctx, void *data,
         if (s->frame_size > buf_size) {
             av_log(avctx, AV_LOG_ERROR, "incomplete frame\n");
             err = AAC_AC3_PARSE_ERROR_FRAME_SIZE;
-        } else if (avctx->err_recognition & AV_EF_CRCCHECK) {
+        } else if (avctx->err_recognition & (AV_EF_CRCCHECK|AV_EF_CAREFUL)) {
             /* check for crc mismatch */
             if (av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, &buf[2],
                        s->frame_size - 2)) {
@@ -1400,8 +1383,8 @@ static int ac3_decode_frame(AVCodecContext * avctx, void *data,
         avctx->channels       = s->out_channels;
         avctx->channel_layout = s->channel_layout;
 
-        s->loro_center_mix_level   = gain_levels[  center_levels[s->  center_mix_level]];
-        s->loro_surround_mix_level = gain_levels[surround_levels[s->surround_mix_level]];
+        s->loro_center_mix_level   = gain_levels[s->  center_mix_level];
+        s->loro_surround_mix_level = gain_levels[s->surround_mix_level];
         s->ltrt_center_mix_level   = LEVEL_MINUS_3DB;
         s->ltrt_surround_mix_level = LEVEL_MINUS_3DB;
         /* set downmixing coefficients if needed */