avformat: Improve returned error codes

This commit improves returned error codes by forwarding error codes. In
some instances, the hardcoded returned error codes made no sense at all:
The normal error code for failure of av_new_packet() is AVERROR(ENOMEM),
yet there were instances where AVERROR(EIO) was returned.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavformat/4xm.c

@@ -322,8 +322,10 @@ static int fourxm_read_packet(AVFormatContext *s,
         case cfr2_TAG:
             /* allocate 8 more bytes than 'size' to account for fourcc
              * and size */
-            if (size + 8 < size || av_new_packet(pkt, size + 8))
-                return AVERROR(EIO);
+            if (size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE - 8)
+                return AVERROR_INVALIDDATA;
+            if ((ret = av_new_packet(pkt, size + 8)) < 0)
+                return ret;
             pkt->stream_index = fourxm->video_stream_index;
             pkt->pts          = fourxm->video_pts;
             pkt->pos          = avio_tell(s->pb);
@@ -347,7 +349,7 @@ static int fourxm_read_packet(AVFormatContext *s,
                 fourxm->tracks[track_number].channels > 0) {
                 ret = av_get_packet(s->pb, pkt, size);
                 if (ret < 0)
-                    return AVERROR(EIO);
+                    return ret;
                 pkt->stream_index =
                     fourxm->tracks[track_number].stream_index;
                 pkt->pts    = fourxm->tracks[track_number].audio_pts;

libavformat/flic.c

@@ -215,10 +215,9 @@ static int flic_read_packet(AVFormatContext *s,
         magic = AV_RL16(&preamble[4]);
 
         if (((magic == FLIC_CHUNK_MAGIC_1) || (magic == FLIC_CHUNK_MAGIC_2)) && size > FLIC_PREAMBLE_SIZE) {
-            if (av_new_packet(pkt, size)) {
-                ret = AVERROR(EIO);
-                break;
-            }
+            if ((ret = av_new_packet(pkt, size)) < 0)
+                return ret;
+
             pkt->stream_index = flic->video_stream_index;
             pkt->pts = flic->frame_number++;
             pkt->pos = avio_tell(pb);
@@ -231,10 +230,8 @@ static int flic_read_packet(AVFormatContext *s,
             }
             packet_read = 1;
         } else if (magic == FLIC_TFTD_CHUNK_AUDIO) {
-            if (av_new_packet(pkt, size)) {
-                ret = AVERROR(EIO);
-                break;
-            }
+            if ((ret = av_new_packet(pkt, size)) < 0)
+                return ret;
 
             /* skip useless 10B sub-header (yes, it's not accounted for in the chunk header) */
             avio_skip(pb, 10);

libavformat/idroqdec.c

@@ -205,8 +205,9 @@ static int roq_read_packet(AVFormatContext *s,
             }
 
             /* load up the packet */
-            if (av_new_packet(pkt, chunk_size + RoQ_CHUNK_PREAMBLE_SIZE))
-                return AVERROR(EIO);
+            ret = av_new_packet(pkt, chunk_size + RoQ_CHUNK_PREAMBLE_SIZE);
+            if (ret < 0)
+                return ret;
             /* copy over preamble */
             memcpy(pkt->data, preamble, RoQ_CHUNK_PREAMBLE_SIZE);
 

libavformat/psxstr.c

@@ -160,7 +160,7 @@ static int str_read_packet(AVFormatContext *s,
     AVIOContext *pb = s->pb;
     StrDemuxContext *str = s->priv_data;
     unsigned char sector[RAW_CD_SECTOR_SIZE];
-    int channel;
+    int channel, ret;
     AVPacket *pkt;
     AVStream *st;
 
@@ -213,8 +213,9 @@ static int str_read_packet(AVFormatContext *s,
                     if(pkt->data)
                         av_log(s, AV_LOG_ERROR, "mismatching sector_count\n");
                     av_packet_unref(pkt);
-                    if (av_new_packet(pkt, sector_count*VIDEO_DATA_CHUNK_SIZE))
-                        return AVERROR(EIO);
+                    ret = av_new_packet(pkt, sector_count * VIDEO_DATA_CHUNK_SIZE);
+                    if (ret < 0)
+                        return ret;
                     memset(pkt->data, 0, sector_count*VIDEO_DATA_CHUNK_SIZE);
 
                     pkt->pos= avio_tell(pb) - RAW_CD_SECTOR_SIZE;
@@ -267,8 +268,8 @@ static int str_read_packet(AVFormatContext *s,
                 st->start_time = 0;
             }
             pkt = ret_pkt;
-            if (av_new_packet(pkt, 2304))
-                return AVERROR(EIO);
+            if ((ret = av_new_packet(pkt, 2304)) < 0)
+                return ret;
             memcpy(pkt->data,sector+24,2304);
 
             pkt->stream_index =

libavformat/rmdec.c

@@ -781,8 +781,8 @@ static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
             return -1;
         }
         rm->remaining_len -= len;
-        if(av_new_packet(pkt, len + 9) < 0)
-            return AVERROR(EIO);
+        if ((ret = av_new_packet(pkt, len + 9)) < 0)
+            return ret;
         pkt->data[0] = 0;
         AV_WL32(pkt->data + 1, 1);
         AV_WL32(pkt->data + 5, 0);
@@ -804,8 +804,8 @@ static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
         vst->slices = ((hdr & 0x3F) << 1) + 1;
         vst->videobufsize = len2 + 8*vst->slices + 1;
         av_packet_unref(&vst->pkt); //FIXME this should be output.
-        if(av_new_packet(&vst->pkt, vst->videobufsize) < 0)
-            return AVERROR(ENOMEM);
+        if ((ret = av_new_packet(&vst->pkt, vst->videobufsize)) < 0)
+            return ret;
         memset(vst->pkt.data, 0, vst->pkt.size);
         vst->videobufpos = 8*vst->slices + 1;
         vst->cur_slice = 0;

libavformat/vqf.c

@@ -237,8 +237,8 @@ static int vqf_read_packet(AVFormatContext *s, AVPacket *pkt)
     int ret;
     int size = (c->frame_bit_len - c->remaining_bits + 7)>>3;
 
-    if (av_new_packet(pkt, size+2) < 0)
-        return AVERROR(EIO);
+    if ((ret = av_new_packet(pkt, size + 2)) < 0)
+        return ret;
 
     pkt->pos          = avio_tell(s->pb);
     pkt->stream_index = 0;