h264_mp4toannexb: Cosmetics

Mainly reindentation, but some variables were also put into a smaller
scope.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/h264_mp4toannexb_bsf.c

@@ -168,15 +168,13 @@ static int h264_mp4toannexb_init(AVBSFContext *ctx)
 static int h264_mp4toannexb_filter(AVBSFContext *ctx, AVPacket *opkt)
 {
     H264BSFContext *s = ctx->priv_data;
-
     AVPacket *in;
     uint8_t unit_type, new_idr, sps_seen, pps_seen;
-    uint32_t nal_size;
     const uint8_t *buf;
     const uint8_t *buf_end;
     uint8_t *out;
     uint64_t out_size;
-    int ret = 0, i;
+    int ret;
 
     ret = ff_bsf_get_packet(ctx, &in);
     if (ret < 0)
@@ -202,8 +200,10 @@ static int h264_mp4toannexb_filter(AVBSFContext *ctx, AVPacket *opkt)
         out_size = 0;
 
         do {
+            uint32_t nal_size = 0;
+
             /* possible overread ok due to padding */
-        for (nal_size = 0, i = 0; i<s->length_size; i++)
+            for (int i = 0; i < s->length_size; i++)
                 nal_size = (nal_size << 8) | buf[i];
 
             buf += s->length_size;
@@ -220,22 +220,22 @@ static int h264_mp4toannexb_filter(AVBSFContext *ctx, AVPacket *opkt)
 
             unit_type = *buf & 0x1f;
 
-        if (unit_type == H264_NAL_SPS)
+            if (unit_type == H264_NAL_SPS) {
                 sps_seen = new_idr = 1;
-        else if (unit_type == H264_NAL_PPS) {
+            } else if (unit_type == H264_NAL_PPS) {
                 pps_seen = new_idr = 1;
                 /* if SPS has not been seen yet, prepend the AVCC one to PPS */
                 if (!sps_seen) {
-                if (!s->sps_size)
+                    if (!s->sps_size) {
                         LOG_ONCE(ctx, AV_LOG_WARNING, "SPS not present in the stream, nor in AVCC, stream may be unreadable\n");
-                else {
+                    } else {
                         count_or_copy(&out, &out_size, s->sps, s->sps_size, -1, j);
                         sps_seen = 1;
                     }
                 }
             }
 
-        /* if this is a new IDR picture following an IDR picture, reset the idr flag.
+            /* If this is a new IDR picture following an IDR picture, reset the idr flag.
              * Just check first_mb_in_slice to be 0 as this is the simplest solution.
              * This could be checking idr_pic_id instead, but would complexify the parsing. */
             if (!new_idr && unit_type == H264_NAL_IDR_SLICE && (buf[1] & 0x80))