avcodec/bsf: replace ctx->internal-> with bsfi-> for better readability

Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/bsf.c

@@ -82,6 +82,7 @@ const AVClass *av_bsf_get_class(void)
 int av_bsf_alloc(const AVBitStreamFilter *filter, AVBSFContext **pctx)
 {
     AVBSFContext *ctx;
+    AVBSFInternal *bsfi;
     int ret;
 
     ctx = av_mallocz(sizeof(*ctx));
@@ -98,14 +99,15 @@ int av_bsf_alloc(const AVBitStreamFilter *filter, AVBSFContext **pctx)
         goto fail;
     }
 
-    ctx->internal = av_mallocz(sizeof(*ctx->internal));
-    if (!ctx->internal) {
+    bsfi = av_mallocz(sizeof(*bsfi));
+    if (!bsfi) {
         ret = AVERROR(ENOMEM);
         goto fail;
     }
+    ctx->internal = bsfi;
 
-    ctx->internal->buffer_pkt = av_packet_alloc();
-    if (!ctx->internal->buffer_pkt) {
+    bsfi->buffer_pkt = av_packet_alloc();
+    if (!bsfi->buffer_pkt) {
         ret = AVERROR(ENOMEM);
         goto fail;
     }
@@ -175,9 +177,11 @@ int av_bsf_init(AVBSFContext *ctx)
 
 void av_bsf_flush(AVBSFContext *ctx)
 {
-    ctx->internal->eof = 0;
+    AVBSFInternal *bsfi = ctx->internal;
 
-    av_packet_unref(ctx->internal->buffer_pkt);
+    bsfi->eof = 0;
+
+    av_packet_unref(bsfi->buffer_pkt);
 
     if (ctx->filter->flush)
         ctx->filter->flush(ctx);
@@ -185,26 +189,27 @@ void av_bsf_flush(AVBSFContext *ctx)
 
 int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
 {
+    AVBSFInternal *bsfi = ctx->internal;
     int ret;
 
     if (!pkt || (!pkt->data && !pkt->side_data_elems)) {
-        ctx->internal->eof = 1;
+        bsfi->eof = 1;
         return 0;
     }
 
-    if (ctx->internal->eof) {
+    if (bsfi->eof) {
         av_log(ctx, AV_LOG_ERROR, "A non-NULL packet sent after an EOF.\n");
         return AVERROR(EINVAL);
     }
 
-    if (ctx->internal->buffer_pkt->data ||
-        ctx->internal->buffer_pkt->side_data_elems)
+    if (bsfi->buffer_pkt->data ||
+        bsfi->buffer_pkt->side_data_elems)
         return AVERROR(EAGAIN);
 
     ret = av_packet_make_refcounted(pkt);
     if (ret < 0)
         return ret;
-    av_packet_move_ref(ctx->internal->buffer_pkt, pkt);
+    av_packet_move_ref(bsfi->buffer_pkt, pkt);
 
     return 0;
 }
@@ -216,38 +221,38 @@ int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
 
 int ff_bsf_get_packet(AVBSFContext *ctx, AVPacket **pkt)
 {
-    AVBSFInternal *in = ctx->internal;
+    AVBSFInternal *bsfi = ctx->internal;
     AVPacket *tmp_pkt;
 
-    if (in->eof)
+    if (bsfi->eof)
         return AVERROR_EOF;
 
-    if (!ctx->internal->buffer_pkt->data &&
-        !ctx->internal->buffer_pkt->side_data_elems)
+    if (!bsfi->buffer_pkt->data &&
+        !bsfi->buffer_pkt->side_data_elems)
         return AVERROR(EAGAIN);
 
     tmp_pkt = av_packet_alloc();
     if (!tmp_pkt)
         return AVERROR(ENOMEM);
 
-    *pkt = ctx->internal->buffer_pkt;
-    ctx->internal->buffer_pkt = tmp_pkt;
+    *pkt = bsfi->buffer_pkt;
+    bsfi->buffer_pkt = tmp_pkt;
 
     return 0;
 }
 
 int ff_bsf_get_packet_ref(AVBSFContext *ctx, AVPacket *pkt)
 {
-    AVBSFInternal *in = ctx->internal;
+    AVBSFInternal *bsfi = ctx->internal;
 
-    if (in->eof)
+    if (bsfi->eof)
         return AVERROR_EOF;
 
-    if (!ctx->internal->buffer_pkt->data &&
-        !ctx->internal->buffer_pkt->side_data_elems)
+    if (!bsfi->buffer_pkt->data &&
+        !bsfi->buffer_pkt->side_data_elems)
         return AVERROR(EAGAIN);
 
-    av_packet_move_ref(pkt, ctx->internal->buffer_pkt);
+    av_packet_move_ref(pkt, bsfi->buffer_pkt);
 
     return 0;
 }