flacdec: allow mid-stream channel layout change

[ffmpeg] / libavcodec / aaccoder.c

diff --git a/libavcodec/aaccoder.c b/libavcodec/aaccoder.c
index 36a49a75380f43c03739dc6060df7dd84233f7cd..d65d8d9584d50b04a2361d067ec84de65fb24080 100644 (file)
--- a/libavcodec/aaccoder.c
+++ b/libavcodec/aaccoder.c
@@ -585,7 +585,6 @@ static void search_for_quantizers_anmr(AVCodecContext *avctx, AACEncContext *s,
     q0 = coef2minsf(q0f);
     //maximum scalefactor index is when maximum coefficient after quantizing is still not zero
     q1 = coef2maxsf(q1f);
-    //av_log(NULL, AV_LOG_ERROR, "q0 %d, q1 %d\n", q0, q1);
     if (q1 - q0 > 60) {
         int q0low  = q0;
         int q1high = q1;
@@ -593,7 +592,6 @@ static void search_for_quantizers_anmr(AVCodecContext *avctx, AACEncContext *s,
         int qnrg = av_clip_uint8(log2f(sqrtf(qnrgf/qcnt))*4 - 31 + SCALE_ONE_POS - SCALE_DIV_512);
         q1 = qnrg + 30;
         q0 = qnrg - 30;
-        //av_log(NULL, AV_LOG_ERROR, "q0 %d, q1 %d\n", q0, q1);
         if (q0 < q0low) {
             q1 += q0low - q0;
             q0  = q0low;
@@ -602,7 +600,6 @@ static void search_for_quantizers_anmr(AVCodecContext *avctx, AACEncContext *s,
             q1  = q1high;
         }
     }
-    //av_log(NULL, AV_LOG_ERROR, "q0 %d, q1 %d\n", q0, q1);
 
     for (i = 0; i < TRELLIS_STATES; i++) {
         paths[0][i].cost    = 0.0f;
@@ -721,6 +718,9 @@ static void search_for_quantizers_twoloop(AVCodecContext *avctx,
     int allz = 0;
     float minthr = INFINITY;
 
+    // for values above this the decoder might end up in an endless loop
+    // due to always having more bits than what can be encoded.
+    destbits = FFMIN(destbits, 5800);
     //XXX: some heuristic to determine initial quantizers will reduce search time
     //determine zero bands and upper limits
     for (w = 0; w < sce->ics.num_windows; w += sce->ics.group_len[w]) {