From 83548fe894cdb455cc127f754d09905b6d23c173 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Tue, 27 Sep 2016 16:26:37 +0200
Subject: [PATCH] lavf: fix usage of AVIOContext.seekable

It is supposed to be a flag. The only currently defined value is
AVIO_SEEKABLE_NORMAL, but other ones may be added in the future.
However all the current lavf code treats this field as a bool (mainly
for historical reasons).
Change all those cases to properly check for AVIO_SEEKABLE_NORMAL.
---
 libavformat/aiffdec.c      |  2 +-
 libavformat/aiffenc.c      |  2 +-
 libavformat/ape.c          |  2 +-
 libavformat/apetag.c       |  2 +-
 libavformat/asfdec.c       |  8 +++++---
 libavformat/asfenc.c       |  4 ++--
 libavformat/au.c           |  2 +-
 libavformat/avidec.c       |  5 +++--
 libavformat/avienc.c       | 18 +++++++++---------
 libavformat/aviobuf.c      |  2 +-
 libavformat/bink.c         |  2 +-
 libavformat/cafdec.c       |  4 ++--
 libavformat/filmstripdec.c |  2 +-
 libavformat/flacenc.c      |  2 +-
 libavformat/flvdec.c       |  3 ++-
 libavformat/gxfenc.c       |  2 +-
 libavformat/id3v1.c        |  2 +-
 libavformat/matroskadec.c  |  2 +-
 libavformat/matroskaenc.c  | 14 +++++++-------
 libavformat/mmf.c          |  2 +-
 libavformat/mov.c          | 12 ++++++------
 libavformat/movenc.c       |  2 +-
 libavformat/mp3enc.c       |  2 +-
 libavformat/mpc.c          |  2 +-
 libavformat/mpc8.c         |  2 +-
 libavformat/mpeg.c         |  2 +-
 libavformat/mpegts.c       |  3 ++-
 libavformat/mvdec.c        |  4 ++--
 libavformat/mxfdec.c       |  4 ++--
 libavformat/mxfenc.c       |  2 +-
 libavformat/nutdec.c       |  2 +-
 libavformat/oggdec.c       |  2 +-
 libavformat/r3d.c          |  2 +-
 libavformat/rmdec.c        |  3 ++-
 libavformat/rmenc.c        |  6 +++---
 libavformat/rsoenc.c       |  2 +-
 libavformat/smjpegenc.c    |  2 +-
 libavformat/soxenc.c       |  2 +-
 libavformat/swfenc.c       |  2 +-
 libavformat/takdec.c       |  2 +-
 libavformat/tty.c          |  2 +-
 libavformat/utils.c        |  2 +-
 libavformat/vc1testenc.c   |  2 +-
 libavformat/voc_packet.c   |  2 +-
 libavformat/wavdec.c       |  2 +-
 libavformat/wavenc.c       |  4 ++--
 libavformat/wvdec.c        |  4 ++--
 libavformat/wvenc.c        |  2 +-
 48 files changed, 84 insertions(+), 78 deletions(-)

diff --git a/libavformat/aiffdec.c b/libavformat/aiffdec.c
index 3c45c61b1a..481a92d351 100644
--- a/libavformat/aiffdec.c
+++ b/libavformat/aiffdec.c
@@ -251,7 +251,7 @@ static int aiff_read_header(AVFormatContext *s)
             offset += avio_tell(pb);    /* Compute absolute data offset */
             if (st->codecpar->block_align)    /* Assume COMM already parsed */
                 goto got_sound;
-            if (!pb->seekable) {
+            if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
                 av_log(s, AV_LOG_ERROR, "file is not seekable\n");
                 return -1;
             }
diff --git a/libavformat/aiffenc.c b/libavformat/aiffenc.c
index 6449c00cad..191e746672 100644
--- a/libavformat/aiffenc.c
+++ b/libavformat/aiffenc.c
@@ -129,7 +129,7 @@ static int aiff_write_trailer(AVFormatContext *s)
         end_size++;
     }
 
-    if (s->pb->seekable) {
+    if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
         /* File length */
         avio_seek(pb, aiff->form, SEEK_SET);
         avio_wb32(pb, file_size - aiff->form - 4);
diff --git a/libavformat/ape.c b/libavformat/ape.c
index bcc1f7aa07..80e3372403 100644
--- a/libavformat/ape.c
+++ b/libavformat/ape.c
@@ -370,7 +370,7 @@ static int ape_read_header(AVFormatContext * s)
     }
 
     /* try to read APE tags */
-    if (pb->seekable) {
+    if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
         ff_ape_parse_tag(s);
         avio_seek(pb, 0, SEEK_SET);
     }
diff --git a/libavformat/apetag.c b/libavformat/apetag.c
index 044bfd8022..05430dd9bc 100644
--- a/libavformat/apetag.c
+++ b/libavformat/apetag.c
@@ -182,7 +182,7 @@ int ff_ape_write_tag(AVFormatContext *s)
     int64_t start, end;
     int size, count = 0;
 
-    if (!s->pb->seekable)
+    if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
         return 0;
 
     start = avio_tell(s->pb);
diff --git a/libavformat/asfdec.c b/libavformat/asfdec.c
index 7d71789029..1c50ad627c 100644
--- a/libavformat/asfdec.c
+++ b/libavformat/asfdec.c
@@ -960,7 +960,7 @@ static int asf_read_data(AVFormatContext *s, const GUIDParseTable *g)
                size, asf->nb_packets);
     avio_skip(pb, 2); // skip reserved field
     asf->first_packet_offset = avio_tell(pb);
-    if (pb->seekable && !(asf->b_flags & ASF_FLAG_BROADCAST))
+    if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !(asf->b_flags & ASF_FLAG_BROADCAST))
         align_position(pb, asf->offset, asf->data_size);
 
     return 0;
@@ -1738,7 +1738,9 @@ static int asf_read_header(AVFormatContext *s)
             size = avio_rl64(pb);
             align_position(pb, asf->offset, size);
         }
-        if (asf->data_reached && (!pb->seekable || (asf->b_flags & ASF_FLAG_BROADCAST)))
+        if (asf->data_reached &&
+            (!(pb->seekable & AVIO_SEEKABLE_NORMAL) ||
+             (asf->b_flags & ASF_FLAG_BROADCAST)))
             break;
     }
 
@@ -1747,7 +1749,7 @@ static int asf_read_header(AVFormatContext *s)
         ret = AVERROR_INVALIDDATA;
         goto failed;
     }
-    if (pb->seekable)
+    if (pb->seekable & AVIO_SEEKABLE_NORMAL)
         avio_seek(pb, asf->first_packet_offset, SEEK_SET);
 
     for (i = 0; i < asf->nb_streams; i++) {
diff --git a/libavformat/asfenc.c b/libavformat/asfenc.c
index dc1dd73364..a40c02d00d 100644
--- a/libavformat/asfenc.c
+++ b/libavformat/asfenc.c
@@ -433,7 +433,7 @@ static int asf_write_header1(AVFormatContext *s, int64_t file_size,
     avio_wl64(pb, play_duration); /* end time stamp (in 100ns units) */
     avio_wl64(pb, send_duration); /* duration (in 100ns units) */
     avio_wl64(pb, PREROLL_TIME); /* start time stamp */
-    avio_wl32(pb, (asf->is_streamed || !pb->seekable) ? 3 : 2);  /* ??? */
+    avio_wl32(pb, (asf->is_streamed || !(pb->seekable & AVIO_SEEKABLE_NORMAL)) ? 3 : 2);  /* ??? */
     avio_wl32(pb, s->packet_size); /* packet size */
     avio_wl32(pb, s->packet_size); /* packet size */
     avio_wl32(pb, bit_rate); /* Nominal data rate in bps */
@@ -954,7 +954,7 @@ static int asf_write_trailer(AVFormatContext *s)
         asf_write_index(s, asf->index_ptr, asf->maximum_packet, asf->nb_index_count);
     avio_flush(s->pb);
 
-    if (asf->is_streamed || !s->pb->seekable) {
+    if (asf->is_streamed || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
         put_chunk(s, 0x4524, 0, 0); /* end of stream */
     } else {
         /* rewrite an updated header */
diff --git a/libavformat/au.c b/libavformat/au.c
index e30314239f..20c9d41f47 100644
--- a/libavformat/au.c
+++ b/libavformat/au.c
@@ -192,7 +192,7 @@ static int au_write_trailer(AVFormatContext *s)
     AVIOContext *pb = s->pb;
     int64_t file_size;
 
-    if (s->pb->seekable) {
+    if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
         /* update file size */
         file_size = avio_tell(pb);
         avio_seek(pb, 8, SEEK_SET);
diff --git a/libavformat/avidec.c b/libavformat/avidec.c
index 3666b573e0..ddc7c2b6f4 100644
--- a/libavformat/avidec.c
+++ b/libavformat/avidec.c
@@ -761,7 +761,8 @@ static int avi_read_header(AVFormatContext *s)
             break;
         case MKTAG('i', 'n', 'd', 'x'):
             pos = avio_tell(pb);
-            if (pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) &&
+            if ((pb->seekable & AVIO_SEEKABLE_NORMAL) &&
+                !(s->flags & AVFMT_FLAG_IGNIDX) &&
                 read_braindead_odml_indx(s, 0) < 0 &&
                 (s->error_recognition & AV_EF_EXPLODE))
                 goto fail;
@@ -828,7 +829,7 @@ fail:
         return AVERROR_INVALIDDATA;
     }
 
-    if (!avi->index_loaded && pb->seekable)
+    if (!avi->index_loaded && (pb->seekable & AVIO_SEEKABLE_NORMAL))
         avi_load_index(s);
     avi->index_loaded     = 1;
 
diff --git a/libavformat/avienc.c b/libavformat/avienc.c
index d89fab17e8..e4743981b8 100644
--- a/libavformat/avienc.c
+++ b/libavformat/avienc.c
@@ -189,7 +189,7 @@ static int avi_write_header(AVFormatContext *s)
         avio_wl32(pb, 0);
     avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */
     avio_wl32(pb, 0); /* padding */
-    if (!pb->seekable)
+    if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
         avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED);  /* flags */
     else
         avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED);  /* flags */
@@ -261,7 +261,7 @@ static int avi_write_header(AVFormatContext *s)
         avio_wl32(pb, 0); /* start */
         /* remember this offset to fill later */
         avist->frames_hdr_strm = avio_tell(pb);
-        if (!pb->seekable)
+        if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
             /* FIXME: this may be broken, but who cares */
             avio_wl32(pb, AVI_MAX_RIFF_SIZE);
         else
@@ -306,7 +306,7 @@ static int avi_write_header(AVFormatContext *s)
             }
         }
 
-        if (pb->seekable) {
+        if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
             unsigned char tag[5];
             int j;
 
@@ -366,7 +366,7 @@ static int avi_write_header(AVFormatContext *s)
         ff_end_tag(pb, list2);
     }
 
-    if (pb->seekable) {
+    if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
         /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
         avi->odml_list = ff_start_tag(pb, "JUNK");
         ffio_wfourcc(pb, "odml");
@@ -403,7 +403,7 @@ static int avi_write_ix(AVFormatContext *s)
     char ix_tag[] = "ix00";
     int i, j;
 
-    assert(pb->seekable);
+    assert(pb->seekable & AVIO_SEEKABLE_NORMAL);
 
     if (avi->riff_id > AVI_MASTER_INDEX_SIZE)
         return -1;
@@ -461,7 +461,7 @@ static int avi_write_idx1(AVFormatContext *s)
     int i;
     char tag[5];
 
-    if (pb->seekable) {
+    if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
         AVIStream *avist;
         AVIIentry *ie = 0, *tie;
         int empty, stream_id = -1;
@@ -528,7 +528,7 @@ static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
     avist->packet_count++;
 
     // Make sure to put an OpenDML chunk when the file size exceeds the limits
-    if (pb->seekable &&
+    if ((pb->seekable & AVIO_SEEKABLE_NORMAL) &&
         (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
         avi_write_ix(s);
         ff_end_tag(pb, avi->movi_list);
@@ -546,7 +546,7 @@ static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
     if (par->codec_type == AVMEDIA_TYPE_AUDIO)
         avist->audio_strm_length += size;
 
-    if (s->pb->seekable) {
+    if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
         int err;
         AVIIndex *idx = &avist->indexes;
         int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
@@ -588,7 +588,7 @@ static int avi_write_trailer(AVFormatContext *s)
     int i, j, n, nb_frames;
     int64_t file_size;
 
-    if (pb->seekable) {
+    if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
         if (avi->riff_id == 1) {
             ff_end_tag(pb, avi->movi_list);
             res = avi_write_idx1(s);
diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c
index 706cf5dd7f..39a11e21c4 100644
--- a/libavformat/aviobuf.c
+++ b/libavformat/aviobuf.c
@@ -265,7 +265,7 @@ int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
         offset1 >= 0 && offset1 < (s->buf_end - s->buffer)) {
         /* can do the seek inside the buffer */
         s->buf_ptr = s->buffer + offset1;
-    } else if ((!s->seekable ||
+    } else if ((!(s->seekable & AVIO_SEEKABLE_NORMAL) ||
                offset1 <= s->buf_end + SHORT_SEEK_THRESHOLD - s->buffer) &&
                !s->write_flag && offset1 >= 0 &&
               (whence != SEEK_END || force)) {
diff --git a/libavformat/bink.c b/libavformat/bink.c
index 377db98971..8f28212ab4 100644
--- a/libavformat/bink.c
+++ b/libavformat/bink.c
@@ -267,7 +267,7 @@ static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, in
     BinkDemuxContext *bink = s->priv_data;
     AVStream *vst = s->streams[0];
 
-    if (!s->pb->seekable)
+    if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
         return -1;
 
     /* seek to the first frame */
diff --git a/libavformat/cafdec.c b/libavformat/cafdec.c
index 65bdcfc1ef..efc8c49c4a 100644
--- a/libavformat/cafdec.c
+++ b/libavformat/cafdec.c
@@ -249,7 +249,7 @@ static int read_header(AVFormatContext *s)
 
         /* stop at data chunk if seeking is not supported or
            data chunk size is unknown */
-        if (found_data && (caf->data_size < 0 || !pb->seekable))
+        if (found_data && (caf->data_size < 0 || !(pb->seekable & AVIO_SEEKABLE_NORMAL)))
             break;
 
         tag  = avio_rb32(pb);
@@ -262,7 +262,7 @@ static int read_header(AVFormatContext *s)
             avio_skip(pb, 4); /* edit count */
             caf->data_start = avio_tell(pb);
             caf->data_size  = size < 0 ? -1 : size - 4;
-            if (caf->data_size > 0 && pb->seekable)
+            if (caf->data_size > 0 && (pb->seekable & AVIO_SEEKABLE_NORMAL))
                 avio_skip(pb, caf->data_size);
             found_data = 1;
             break;
diff --git a/libavformat/filmstripdec.c b/libavformat/filmstripdec.c
index b029d8023e..b5dad50c37 100644
--- a/libavformat/filmstripdec.c
+++ b/libavformat/filmstripdec.c
@@ -40,7 +40,7 @@ static int read_header(AVFormatContext *s)
     AVIOContext *pb = s->pb;
     AVStream *st;
 
-    if (!s->pb->seekable)
+    if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
         return AVERROR(EIO);
 
     avio_seek(pb, avio_size(pb) - 36, SEEK_SET);
diff --git a/libavformat/flacenc.c b/libavformat/flacenc.c
index 3cee668afc..06985cf240 100644
--- a/libavformat/flacenc.c
+++ b/libavformat/flacenc.c
@@ -130,7 +130,7 @@ static int flac_write_trailer(struct AVFormatContext *s)
     if (!c->write_header || !streaminfo)
         return 0;
 
-    if (pb->seekable) {
+    if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
         /* rewrite the STREAMINFO header block data */
         file_size = avio_tell(pb);
         avio_seek(pb, 8, SEEK_SET);
diff --git a/libavformat/flvdec.c b/libavformat/flvdec.c
index 0d9a113edb..b82ea3303b 100644
--- a/libavformat/flvdec.c
+++ b/libavformat/flvdec.c
@@ -837,7 +837,8 @@ skip:
 
     // if not streamed and no duration from metadata then seek to end to find
     // the duration from the timestamps
-    if (s->pb->seekable && (!s->duration || s->duration == AV_NOPTS_VALUE) &&
+    if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
+        (!s->duration || s->duration == AV_NOPTS_VALUE) &&
         !flv->searched_for_end) {
         int size;
         const int64_t pos   = avio_tell(s->pb);
diff --git a/libavformat/gxfenc.c b/libavformat/gxfenc.c
index 60f88fdabd..32714f63ae 100644
--- a/libavformat/gxfenc.c
+++ b/libavformat/gxfenc.c
@@ -633,7 +633,7 @@ static int gxf_write_header(AVFormatContext *s)
     uint8_t tracks[255] = {0};
     int i, media_info = 0;
 
-    if (!pb->seekable) {
+    if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
         av_log(s, AV_LOG_ERROR, "gxf muxer does not support streamed output, patch welcome");
         return -1;
     }
diff --git a/libavformat/id3v1.c b/libavformat/id3v1.c
index 87930ff361..9420d9e57c 100644
--- a/libavformat/id3v1.c
+++ b/libavformat/id3v1.c
@@ -230,7 +230,7 @@ void ff_id3v1_read(AVFormatContext *s)
     uint8_t buf[ID3v1_TAG_SIZE];
     int64_t filesize, position = avio_tell(s->pb);
 
-    if (s->pb->seekable) {
+    if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
         /* XXX: change that */
         filesize = avio_size(s->pb);
         if (filesize > 128) {
diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index 7ccba57fe5..991f86b8d5 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -1394,7 +1394,7 @@ static void matroska_execute_seekhead(MatroskaDemuxContext *matroska)
     int i;
 
     // we should not do any seeking in the streaming case
-    if (!matroska->ctx->pb->seekable ||
+    if (!(matroska->ctx->pb->seekable & AVIO_SEEKABLE_NORMAL) ||
         (matroska->ctx->flags & AVFMT_FLAG_IGNIDX))
         return;
 
diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c
index dd5552c369..cfced72ada 100644
--- a/libavformat/matroskaenc.c
+++ b/libavformat/matroskaenc.c
@@ -1252,14 +1252,14 @@ static int mkv_write_header(AVFormatContext *s)
             return ret;
     }
 
-    if (!s->pb->seekable)
+    if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
         mkv_write_seekhead(pb, mkv->main_seekhead);
 
     mkv->cues = mkv_start_cues(mkv->segment_offset);
     if (!mkv->cues)
         return AVERROR(ENOMEM);
 
-    if (pb->seekable && mkv->reserve_cues_space) {
+    if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mkv->reserve_cues_space) {
         mkv->cues_pos = avio_tell(pb);
         put_ebml_void(pb, mkv->reserve_cues_space);
     }
@@ -1271,7 +1271,7 @@ static int mkv_write_header(AVFormatContext *s)
 
     // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
     // after 4k and on a keyframe
-    if (pb->seekable) {
+    if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
         if (mkv->cluster_time_limit < 0)
             mkv->cluster_time_limit = 5000;
         if (mkv->cluster_size_limit < 0)
@@ -1547,7 +1547,7 @@ static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
     }
     ts += mkv->tracks[pkt->stream_index].ts_offset;
 
-    if (!s->pb->seekable) {
+    if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
         if (!mkv->dyn_bc) {
             ret = avio_open_dyn_buf(&mkv->dyn_bc);
             if (ret < 0)
@@ -1613,7 +1613,7 @@ static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
 
     // start a new cluster every 5 MB or 5 sec, or 32k / 1 sec for streaming or
     // after 4k and on a keyframe
-    if (s->pb->seekable) {
+    if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
         pb = s->pb;
         cluster_size = avio_tell(pb) - mkv->cluster_pos;
     } else {
@@ -1666,7 +1666,7 @@ static int mkv_write_flush_packet(AVFormatContext *s, AVPacket *pkt)
 {
     MatroskaMuxContext *mkv = s->priv_data;
     AVIOContext *pb;
-    if (s->pb->seekable)
+    if (s->pb->seekable & AVIO_SEEKABLE_NORMAL)
         pb = s->pb;
     else
         pb = mkv->dyn_bc;
@@ -1717,7 +1717,7 @@ static int mkv_write_trailer(AVFormatContext *s)
             return ret;
     }
 
-    if (pb->seekable) {
+    if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
         if (mkv->cues->num_entries) {
             if (mkv->reserve_cues_space) {
                 int64_t cues_end;
diff --git a/libavformat/mmf.c b/libavformat/mmf.c
index 55aeff410f..454e609e67 100644
--- a/libavformat/mmf.c
+++ b/libavformat/mmf.c
@@ -140,7 +140,7 @@ static int mmf_write_trailer(AVFormatContext *s)
     int64_t pos, size;
     int gatetime;
 
-    if (s->pb->seekable) {
+    if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
         /* Fill in length fields */
         end_tag_be(pb, mmf->awapos);
         end_tag_be(pb, mmf->atrpos);
diff --git a/libavformat/mov.c b/libavformat/mov.c
index ca49716026..36e75d5c38 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -3270,9 +3270,9 @@ static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
             if (err < 0)
                 return err;
             if (c->found_moov && c->found_mdat &&
-                ((!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX) ||
+                ((!(pb->seekable & AVIO_SEEKABLE_NORMAL) || c->fc->flags & AVFMT_FLAG_IGNIDX) ||
                  start_pos + a.size == avio_size(pb))) {
-                if (!pb->seekable || c->fc->flags & AVFMT_FLAG_IGNIDX)
+                if (!(pb->seekable & AVIO_SEEKABLE_NORMAL) || c->fc->flags & AVFMT_FLAG_IGNIDX)
                     c->next_root_atom = start_pos + a.size;
                 return 0;
             }
@@ -3463,7 +3463,7 @@ static int mov_read_header(AVFormatContext *s)
 
     mov->fc = s;
     /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */
-    if (pb->seekable)
+    if (pb->seekable & AVIO_SEEKABLE_NORMAL)
         atom.size = avio_size(pb);
     else
         atom.size = INT64_MAX;
@@ -3481,7 +3481,7 @@ static int mov_read_header(AVFormatContext *s)
     }
     av_log(mov->fc, AV_LOG_TRACE, "on_parse_exit_offset=%"PRId64"\n", avio_tell(pb));
 
-    if (pb->seekable && mov->chapter_track > 0)
+    if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && mov->chapter_track > 0)
         mov_read_chapters(s);
 
     for (i = 0; i < s->nb_streams; i++) {
@@ -3558,8 +3558,8 @@ static AVIndexEntry *mov_find_next_sample(AVFormatContext *s, AVStream **st)
             AVIndexEntry *current_sample = &avst->index_entries[msc->current_sample];
             int64_t dts = av_rescale(current_sample->timestamp, AV_TIME_BASE, msc->time_scale);
             av_log(s, AV_LOG_TRACE, "stream %d, sample %d, dts %"PRId64"\n", i, msc->current_sample, dts);
-            if (!sample || (!s->pb->seekable && current_sample->pos < sample->pos) ||
-                (s->pb->seekable &&
+            if (!sample || (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) && current_sample->pos < sample->pos) ||
+                ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
                  ((msc->pb != s->pb && dts < best_dts) || (msc->pb == s->pb &&
                  ((FFABS(best_dts - dts) <= AV_TIME_BASE && current_sample->pos < sample->pos) ||
                   (FFABS(best_dts - dts) > AV_TIME_BASE && dts < best_dts)))))) {
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 31b940a4b2..f99617a96e 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -4037,7 +4037,7 @@ static int mov_write_header(AVFormatContext *s)
 
     /* Non-seekable output is ok if using fragmentation. If ism_lookahead
      * is enabled, we don't support non-seekable output at all. */
-    if (!s->pb->seekable &&
+    if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
         (!(mov->flags & FF_MOV_FLAG_FRAGMENT) || mov->ism_lookahead)) {
         av_log(s, AV_LOG_ERROR, "muxer does not support non seekable output\n");
         return AVERROR(EINVAL);
diff --git a/libavformat/mp3enc.c b/libavformat/mp3enc.c
index 1e2ff1aa94..d87d7be3f4 100644
--- a/libavformat/mp3enc.c
+++ b/libavformat/mp3enc.c
@@ -141,7 +141,7 @@ static void mp3_write_xing(AVFormatContext *s)
     int ver = 0;
     int lsf, bytes_needed;
 
-    if (!s->pb->seekable || !mp3->write_xing)
+    if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) || !mp3->write_xing)
         return;
 
     for (i = 0; i < FF_ARRAY_ELEMS(avpriv_mpa_freq_tab); i++) {
diff --git a/libavformat/mpc.c b/libavformat/mpc.c
index cf8fe1e136..5be50a7c24 100644
--- a/libavformat/mpc.c
+++ b/libavformat/mpc.c
@@ -105,7 +105,7 @@ static int mpc_read_header(AVFormatContext *s)
     st->duration = c->fcount;
 
     /* try to read APE tags */
-    if (s->pb->seekable) {
+    if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
         int64_t pos = avio_tell(s->pb);
         ff_ape_parse_tag(s);
         if (!av_dict_get(s->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX))
diff --git a/libavformat/mpc8.c b/libavformat/mpc8.c
index 2349ea5bb8..bd17c19838 100644
--- a/libavformat/mpc8.c
+++ b/libavformat/mpc8.c
@@ -252,7 +252,7 @@ static int mpc8_read_header(AVFormatContext *s)
     st->duration = c->samples / (1152 << (st->codecpar->extradata[1]&3)*2);
     size -= avio_tell(pb) - pos;
 
-    if (pb->seekable) {
+    if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
         int64_t pos = avio_tell(s->pb);
         c->apetag_start = ff_ape_parse_tag(s);
         avio_seek(s->pb, pos, SEEK_SET);
diff --git a/libavformat/mpeg.c b/libavformat/mpeg.c
index f63e79f673..0898353ca8 100644
--- a/libavformat/mpeg.c
+++ b/libavformat/mpeg.c
@@ -378,7 +378,7 @@ redo:
         int i;
         for (i = 0; i < s->nb_streams; i++) {
             if (startcode == s->streams[i]->id &&
-                s->pb->seekable /* index useless on streams anyway */) {
+                (s->pb->seekable & AVIO_SEEKABLE_NORMAL) /* index useless on streams anyway */) {
                 ff_reduce_index(s, i);
                 av_add_index_entry(s->streams[i], *ppos, dts, 0, 0,
                                    AVINDEX_KEYFRAME /* FIXME keyframe? */);
diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c
index 40672aeb98..28b6d37bb3 100644
--- a/libavformat/mpegts.c
+++ b/libavformat/mpegts.c
@@ -2087,7 +2087,8 @@ static int mpegts_read_header(AVFormatContext *s)
         /* normal demux */
 
         /* first do a scan to get all the services */
-        if (avio_seek(pb, pos, SEEK_SET) < 0 && pb->seekable)
+        if (avio_seek(pb, pos, SEEK_SET) < 0 &&
+            (pb->seekable & AVIO_SEEKABLE_NORMAL))
             av_log(s, AV_LOG_ERROR, "Unable to seek back to the start\n");
 
         mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
diff --git a/libavformat/mvdec.c b/libavformat/mvdec.c
index f13359c815..52c5355e6a 100644
--- a/libavformat/mvdec.c
+++ b/libavformat/mvdec.c
@@ -403,7 +403,7 @@ static int mv_read_packet(AVFormatContext *avctx, AVPacket *pkt)
         if (index->pos > pos)
             avio_skip(pb, index->pos - pos);
         else if (index->pos < pos) {
-            if (!pb->seekable)
+            if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
                 return AVERROR(EIO);
             ret = avio_seek(pb, index->pos, SEEK_SET);
             if (ret < 0)
@@ -445,7 +445,7 @@ static int mv_read_seek(AVFormatContext *avctx, int stream_index,
     if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE))
         return AVERROR(ENOSYS);
 
-    if (!avctx->pb->seekable)
+    if (!(avctx->pb->seekable & AVIO_SEEKABLE_NORMAL))
         return AVERROR(EIO);
 
     frame = av_index_search_timestamp(st, timestamp, flags);
diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index 449af95e7a..1c7c280188 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -1933,7 +1933,7 @@ static int mxf_parse_handle_essence(MXFContext *mxf)
         /* remember where we were so we don't end up seeking further back than this */
         mxf->last_forward_tell = avio_tell(pb);
 
-        if (!pb->seekable) {
+        if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
             av_log(mxf->fc, AV_LOG_INFO, "file is not seekable - not parsing last partition\n");
             return -1;
         }
@@ -2080,7 +2080,7 @@ static void mxf_read_random_index_pack(AVFormatContext *s)
     int64_t file_size;
     KLVPacket klv;
 
-    if (!s->pb->seekable)
+    if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
         return;
 
     file_size = avio_size(s->pb);
diff --git a/libavformat/mxfenc.c b/libavformat/mxfenc.c
index 1431fc65e8..eb53dbff21 100644
--- a/libavformat/mxfenc.c
+++ b/libavformat/mxfenc.c
@@ -1805,7 +1805,7 @@ static int mxf_write_footer(AVFormatContext *s)
     mxf_write_klv_fill(s);
     mxf_write_random_index_pack(s);
 
-    if (s->pb->seekable) {
+    if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
         avio_seek(pb, 0, SEEK_SET);
         if (mxf->edit_unit_byte_count) {
             if ((err = mxf_write_partition(s, 1, 2, header_closed_partition_key, 1)) < 0)
diff --git a/libavformat/nutdec.c b/libavformat/nutdec.c
index b554f85101..e1a9f6db0f 100644
--- a/libavformat/nutdec.c
+++ b/libavformat/nutdec.c
@@ -765,7 +765,7 @@ static int nut_read_header(AVFormatContext *s)
 
     s->internal->data_offset = pos - 8;
 
-    if (bc->seekable) {
+    if (bc->seekable & AVIO_SEEKABLE_NORMAL) {
         int64_t orig_pos = avio_tell(bc);
         find_and_decode_index(nut);
         avio_seek(bc, orig_pos, SEEK_SET);
diff --git a/libavformat/oggdec.c b/libavformat/oggdec.c
index 9ec24973c6..5965a9730f 100644
--- a/libavformat/oggdec.c
+++ b/libavformat/oggdec.c
@@ -509,7 +509,7 @@ static int ogg_get_length(AVFormatContext *s)
     int i, ret;
     int64_t size, end;
 
-    if (!s->pb->seekable)
+    if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
         return 0;
 
 // already set
diff --git a/libavformat/r3d.c b/libavformat/r3d.c
index 4b28379fc9..9369cdd7df 100644
--- a/libavformat/r3d.c
+++ b/libavformat/r3d.c
@@ -184,7 +184,7 @@ static int r3d_read_header(AVFormatContext *s)
 
     s->internal->data_offset = avio_tell(s->pb);
     av_log(s, AV_LOG_TRACE, "data offset %#"PRIx64"\n", s->internal->data_offset);
-    if (!s->pb->seekable)
+    if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
         return 0;
     // find REOB/REOF/REOS to load index
     avio_seek(s->pb, avio_size(s->pb)-48-8, SEEK_SET);
diff --git a/libavformat/rmdec.c b/libavformat/rmdec.c
index 9774194e8e..51a5bf767c 100644
--- a/libavformat/rmdec.c
+++ b/libavformat/rmdec.c
@@ -519,7 +519,8 @@ static int rm_read_header(AVFormatContext *s)
 
     if (!data_off)
         data_off = avio_tell(pb) - 18;
-    if (indx_off && pb->seekable && !(s->flags & AVFMT_FLAG_IGNIDX) &&
+    if (indx_off && (pb->seekable & AVIO_SEEKABLE_NORMAL) &&
+        !(s->flags & AVFMT_FLAG_IGNIDX) &&
         avio_seek(pb, indx_off, SEEK_SET) >= 0) {
         rm_read_index(s);
         avio_seek(pb, data_off + 18, SEEK_SET);
diff --git a/libavformat/rmenc.c b/libavformat/rmenc.c
index 59118c9484..6cbe700219 100644
--- a/libavformat/rmenc.c
+++ b/libavformat/rmenc.c
@@ -123,7 +123,7 @@ static int rv10_write_header(AVFormatContext *ctx,
     avio_wb32(s, 0);           /* data offset : will be patched after */
     avio_wb16(s, ctx->nb_streams);    /* num streams */
     flags = 1 | 2; /* save allowed & perfect play */
-    if (!s->seekable)
+    if (!(s->seekable & AVIO_SEEKABLE_NORMAL))
         flags |= 4; /* live broadcast */
     avio_wb16(s, flags);
 
@@ -175,7 +175,7 @@ static int rv10_write_header(AVFormatContext *ctx,
         avio_wb32(s, 0);           /* start time */
         avio_wb32(s, BUFFER_DURATION);           /* preroll */
         /* duration */
-        if (!s->seekable || !stream->total_frames)
+        if (!(s->seekable & AVIO_SEEKABLE_NORMAL) || !stream->total_frames)
             avio_wb32(s, (int)(3600 * 1000));
         else
             avio_wb32(s, (int)(stream->total_frames * 1000 / stream->frame_rate));
@@ -433,7 +433,7 @@ static int rm_write_trailer(AVFormatContext *s)
     int data_size, index_pos, i;
     AVIOContext *pb = s->pb;
 
-    if (s->pb->seekable) {
+    if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
         /* end of file: finish to write header */
         index_pos = avio_tell(pb);
         data_size = index_pos - rm->data_pos;
diff --git a/libavformat/rsoenc.c b/libavformat/rsoenc.c
index dd0fbf8c41..4f8278c4ab 100644
--- a/libavformat/rsoenc.c
+++ b/libavformat/rsoenc.c
@@ -38,7 +38,7 @@ static int rso_write_header(AVFormatContext *s)
         return AVERROR_INVALIDDATA;
     }
 
-    if (!s->pb->seekable) {
+    if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
         av_log(s, AV_LOG_ERROR, "muxer does not support non seekable output\n");
         return AVERROR_INVALIDDATA;
     }
diff --git a/libavformat/smjpegenc.c b/libavformat/smjpegenc.c
index 2a9505947f..91b0939cbc 100644
--- a/libavformat/smjpegenc.c
+++ b/libavformat/smjpegenc.c
@@ -120,7 +120,7 @@ static int smjpeg_write_trailer(AVFormatContext *s)
     AVIOContext *pb = s->pb;
     int64_t currentpos;
 
-    if (pb->seekable) {
+    if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
         currentpos = avio_tell(pb);
         avio_seek(pb, 12, SEEK_SET);
         avio_wb32(pb, smc->duration);
diff --git a/libavformat/soxenc.c b/libavformat/soxenc.c
index ea05f36892..d0f7d410d2 100644
--- a/libavformat/soxenc.c
+++ b/libavformat/soxenc.c
@@ -98,7 +98,7 @@ static int sox_write_trailer(AVFormatContext *s)
     AVIOContext *pb = s->pb;
     AVCodecParameters *par = s->streams[0]->codecpar;
 
-    if (s->pb->seekable) {
+    if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
         /* update number of samples */
         int64_t file_size = avio_tell(pb);
         int64_t num_samples = (file_size - sox->header_size - 4LL) >> 2LL;
diff --git a/libavformat/swfenc.c b/libavformat/swfenc.c
index f8db3e9196..345688c654 100644
--- a/libavformat/swfenc.c
+++ b/libavformat/swfenc.c
@@ -495,7 +495,7 @@ static int swf_write_trailer(AVFormatContext *s)
     put_swf_end_tag(s);
 
     /* patch file size and number of frames if not streamed */
-    if (s->pb->seekable && video_par) {
+    if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && video_par) {
         file_size = avio_tell(pb);
         avio_seek(pb, 4, SEEK_SET);
         avio_wl32(pb, file_size);
diff --git a/libavformat/takdec.c b/libavformat/takdec.c
index b28d44ce00..19e0e69a5e 100644
--- a/libavformat/takdec.c
+++ b/libavformat/takdec.c
@@ -101,7 +101,7 @@ static int tak_read_header(AVFormatContext *s)
         case TAK_METADATA_END: {
             int64_t curpos = avio_tell(pb);
 
-            if (pb->seekable) {
+            if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
                 ff_ape_parse_tag(s);
                 avio_seek(pb, curpos, SEEK_SET);
             }
diff --git a/libavformat/tty.c b/libavformat/tty.c
index d4c4873b81..f4535bbd1c 100644
--- a/libavformat/tty.c
+++ b/libavformat/tty.c
@@ -103,7 +103,7 @@ static int read_header(AVFormatContext *avctx)
     /* simulate tty display speed */
     s->chars_per_frame = FFMAX(av_q2d(st->time_base)*s->chars_per_frame, 1);
 
-    if (avctx->pb->seekable) {
+    if (avctx->pb->seekable & AVIO_SEEKABLE_NORMAL) {
         s->fsize = avio_size(avctx->pb);
         st->duration = (s->fsize + s->chars_per_frame - 1) / s->chars_per_frame;
 
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 6df1a32199..0e94b15b72 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -1827,7 +1827,7 @@ static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
 
     if ((!strcmp(ic->iformat->name, "mpeg") ||
          !strcmp(ic->iformat->name, "mpegts")) &&
-        file_size && ic->pb->seekable) {
+        file_size && (ic->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
         /* get accurate estimate from the PTSes */
         estimate_timings_from_pts(ic, old_offset);
     } else if (has_duration(ic)) {
diff --git a/libavformat/vc1testenc.c b/libavformat/vc1testenc.c
index dc23c1461d..c286f66a42 100644
--- a/libavformat/vc1testenc.c
+++ b/libavformat/vc1testenc.c
@@ -73,7 +73,7 @@ static int vc1test_write_trailer(AVFormatContext *s)
     RCVContext *ctx = s->priv_data;
     AVIOContext *pb = s->pb;
 
-    if (s->pb->seekable) {
+    if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
         avio_seek(pb, 0, SEEK_SET);
         avio_wl24(pb, ctx->frames);
         avio_flush(pb);
diff --git a/libavformat/voc_packet.c b/libavformat/voc_packet.c
index ff48d502f2..38650756f7 100644
--- a/libavformat/voc_packet.c
+++ b/libavformat/voc_packet.c
@@ -37,7 +37,7 @@ ff_voc_get_packet(AVFormatContext *s, AVPacket *pkt, AVStream *st, int max_size)
             return AVERROR(EIO);
         voc->remaining_size = avio_rl24(pb);
         if (!voc->remaining_size) {
-            if (!s->pb->seekable)
+            if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
                 return AVERROR(EIO);
             voc->remaining_size = avio_size(pb) - avio_tell(pb);
         }
diff --git a/libavformat/wavdec.c b/libavformat/wavdec.c
index 4bd2642d77..8c78666f84 100644
--- a/libavformat/wavdec.c
+++ b/libavformat/wavdec.c
@@ -289,7 +289,7 @@ static int wav_read_header(AVFormatContext *s)
             /* don't look for footer metadata if we can't seek or if we don't
              * know where the data tag ends
              */
-            if (!pb->seekable || (!rf64 && !size))
+            if (!(pb->seekable & AVIO_SEEKABLE_NORMAL) || (!rf64 && !size))
                 goto break_loop;
             break;
         case MKTAG('f', 'a', 'c', 't'):
diff --git a/libavformat/wavenc.c b/libavformat/wavenc.c
index 32d4bc184d..fc7d49e6d7 100644
--- a/libavformat/wavenc.c
+++ b/libavformat/wavenc.c
@@ -118,7 +118,7 @@ static int wav_write_header(AVFormatContext *s)
     ff_end_tag(pb, fmt);
 
     if (s->streams[0]->codecpar->codec_tag != 0x01 /* hence for all other than PCM */
-        && s->pb->seekable) {
+        && (s->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
         wav->fact_pos = ff_start_tag(pb, "fact");
         avio_wl32(pb, 0);
         ff_end_tag(pb, wav->fact_pos);
@@ -164,7 +164,7 @@ static int wav_write_trailer(AVFormatContext *s)
 
     avio_flush(pb);
 
-    if (s->pb->seekable) {
+    if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
         ff_end_tag(pb, wav->data);
 
         /* update file size */
diff --git a/libavformat/wvdec.c b/libavformat/wvdec.c
index c78bac1ff9..717275c6a0 100644
--- a/libavformat/wvdec.c
+++ b/libavformat/wvdec.c
@@ -116,7 +116,7 @@ static int wv_read_block_header(AVFormatContext *ctx, AVIOContext *pb)
     }
     if ((rate == -1 || !chan) && !wc->block_parsed) {
         int64_t block_end = avio_tell(pb) + wc->header.blocksize;
-        if (!pb->seekable) {
+        if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
             av_log(ctx, AV_LOG_ERROR,
                    "Cannot determine additional parameters\n");
             return AVERROR_INVALIDDATA;
@@ -237,7 +237,7 @@ static int wv_read_header(AVFormatContext *s)
     st->start_time = 0;
     st->duration   = wc->header.total_samples;
 
-    if (s->pb->seekable) {
+    if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
         int64_t cur = avio_tell(s->pb);
         wc->apetag_start = ff_ape_parse_tag(s);
         if (!av_dict_get(s->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX))
diff --git a/libavformat/wvenc.c b/libavformat/wvenc.c
index a753c199db..63f1ea63b5 100644
--- a/libavformat/wvenc.c
+++ b/libavformat/wvenc.c
@@ -60,7 +60,7 @@ static av_cold int wv_write_trailer(AVFormatContext *ctx)
     WvMuxContext *s = ctx->priv_data;
 
     /* update total number of samples in the first block */
-    if (ctx->pb->seekable && s->samples &&
+    if ((ctx->pb->seekable & AVIO_SEEKABLE_NORMAL) && s->samples &&
         s->samples < UINT32_MAX) {
         int64_t pos = avio_tell(ctx->pb);
         avio_seek(ctx->pb, 12, SEEK_SET);