From 5a6af4fd74a4fcadf76cbe28634274d67a07cfad Mon Sep 17 00:00:00 2001
From: Luca Barbato <lu_zero@gentoo.org>
Date: Fri, 17 May 2013 18:28:33 +0200
Subject: [PATCH] wavpack: return meaningful errors

And forward those that were already meaningful.
(cherry picked from commit 8c34558131d846d2b10389564caadaa206372fd4)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>

Conflicts:
	libavcodec/wavpack.c
---
 libavcodec/wavpack.c | 39 ++++++++++++++++++++-------------------
 1 file changed, 20 insertions(+), 19 deletions(-)

diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c
index 59d735fab5..31377e75c6 100644
--- a/libavcodec/wavpack.c
+++ b/libavcodec/wavpack.c
@@ -773,13 +773,13 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
 
     if (block_no >= wc->fdec_num && wv_alloc_frame_context(wc) < 0) {
         av_log(avctx, AV_LOG_ERROR, "Error creating frame decode context\n");
-        return -1;
+        return AVERROR_INVALIDDATA;
     }
 
     s = wc->fdec[block_no];
     if (!s) {
         av_log(avctx, AV_LOG_ERROR, "Context for block %d is not present\n", block_no);
-        return -1;
+        return AVERROR_INVALIDDATA;
     }
 
     memset(s->decorr, 0, MAX_TERMS * sizeof(Decorr));
@@ -1021,7 +1021,7 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
         case WP_ID_CHANINFO:
             if (size <= 1) {
                 av_log(avctx, AV_LOG_ERROR, "Insufficient channel information\n");
-                return -1;
+                return AVERROR_INVALIDDATA;
             }
             chan = *buf++;
             switch (size - 2) {
@@ -1040,10 +1040,11 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
                 chmask = avctx->channel_layout;
             }
             if (chan != avctx->channels) {
-                av_log(avctx, AV_LOG_ERROR, "Block reports total %d channels, "
-                       "decoder believes it's %d channels\n", chan,
-                       avctx->channels);
-                return -1;
+                av_log(avctx, AV_LOG_ERROR,
+                       "Block reports total %d channels, "
+                       "decoder believes it's %d channels\n",
+                       chan, avctx->channels);
+                return AVERROR_INVALIDDATA;
             }
             if (!avctx->channel_layout)
                 avctx->channel_layout = chmask;
@@ -1058,31 +1059,31 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
 
     if (!got_terms) {
         av_log(avctx, AV_LOG_ERROR, "No block with decorrelation terms\n");
-        return -1;
+        return AVERROR_INVALIDDATA;
     }
     if (!got_weights) {
         av_log(avctx, AV_LOG_ERROR, "No block with decorrelation weights\n");
-        return -1;
+        return AVERROR_INVALIDDATA;
     }
     if (!got_samples) {
         av_log(avctx, AV_LOG_ERROR, "No block with decorrelation samples\n");
-        return -1;
+        return AVERROR_INVALIDDATA;
     }
     if (!got_entropy) {
         av_log(avctx, AV_LOG_ERROR, "No block with entropy info\n");
-        return -1;
+        return AVERROR_INVALIDDATA;
     }
     if (s->hybrid && !got_hybrid) {
         av_log(avctx, AV_LOG_ERROR, "Hybrid config not found\n");
-        return -1;
+        return AVERROR_INVALIDDATA;
     }
     if (!got_bs) {
         av_log(avctx, AV_LOG_ERROR, "Packed samples not found\n");
-        return -1;
+        return AVERROR_INVALIDDATA;
     }
     if (!got_float && avctx->sample_fmt == AV_SAMPLE_FMT_FLT) {
         av_log(avctx, AV_LOG_ERROR, "Float information not found\n");
-        return -1;
+        return AVERROR_INVALIDDATA;
     }
     if (s->got_extra_bits && avctx->sample_fmt != AV_SAMPLE_FMT_FLT) {
         const int size   = get_bits_left(&s->gb_extra_bits);
@@ -1102,7 +1103,7 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
             samplecount = wv_unpack_stereo(s, &s->gb, samples, AV_SAMPLE_FMT_FLT);
 
         if (samplecount < 0)
-            return -1;
+            return samplecount;
 
         samplecount >>= 1;
     } else {
@@ -1116,7 +1117,7 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
             samplecount = wv_unpack_mono(s, &s->gb, samples, AV_SAMPLE_FMT_FLT);
 
         if (samplecount < 0)
-            return -1;
+            return samplecount;
 
         if (s->stereo && avctx->sample_fmt == AV_SAMPLE_FMT_S16) {
             int16_t *dst = (int16_t*)samples + 1;
@@ -1193,7 +1194,7 @@ static int wavpack_decode_frame(AVCodecContext *avctx, void *data,
     if (s->samples <= 0) {
         av_log(avctx, AV_LOG_ERROR, "Invalid number of samples: %d\n",
                s->samples);
-        return AVERROR(EINVAL);
+        return AVERROR_INVALIDDATA;
     }
 
     if (frame_flags & 0x80) {
@@ -1227,13 +1228,13 @@ static int wavpack_decode_frame(AVCodecContext *avctx, void *data,
             av_log(avctx, AV_LOG_ERROR, "Block %d has invalid size (size %d "
                    "vs. %d bytes left)\n", s->block, frame_size, buf_size);
             wavpack_decode_flush(avctx);
-            return -1;
+            return AVERROR_INVALIDDATA;
         }
         if ((samplecount = wavpack_decode_block(avctx, s->block,
                                                 s->frame.data[0], got_frame_ptr,
                                                 buf, frame_size)) < 0) {
             wavpack_decode_flush(avctx);
-            return -1;
+            return samplecount;
         }
         s->block++;
         buf += frame_size; buf_size -= frame_size;