avformat/rtpdec: return value check for init_get_bits()

Signed-off-by: Limin Wang <lance.lmwang@gmail.com>

libavformat/rtpdec_h261.c

@@ -119,7 +119,9 @@ static int h261_handle_packet(AVFormatContext *ctx, PayloadContext *rtp_h261_ctx
         } else {
             /* ebit/sbit values inconsistent, assuming packet loss */
             GetBitContext gb;
-            init_get_bits(&gb, buf, len*8 - ebit);
+            res = init_get_bits(&gb, buf, len*8 - ebit);
+            if (res < 0)
+                return res;
             skip_bits(&gb, sbit);
             if (rtp_h261_ctx->endbyte_bits) {
                 rtp_h261_ctx->endbyte |= get_bits(&gb, 8 - rtp_h261_ctx->endbyte_bits);

libavformat/rtpdec_h263_rfc2190.c

@@ -142,7 +142,9 @@ static int h263_handle_packet(AVFormatContext *ctx, PayloadContext *data,
         } else {
             /* Start/end skip bits not matching - missed packets? */
             GetBitContext gb;
-            init_get_bits(&gb, buf, len*8 - ebit);
+            ret = init_get_bits(&gb, buf, len*8 - ebit);
+            if (ret < 0)
+                return ret;
             skip_bits(&gb, sbit);
             if (data->endbyte_bits) {
                 data->endbyte |= get_bits(&gb, 8 - data->endbyte_bits);

libavformat/rtpdec_latm.c

@@ -101,7 +101,9 @@ static int parse_fmtp_config(AVStream *st, const char *value)
     if (!config)
         return AVERROR(ENOMEM);
     ff_hex_to_data(config, value);
-    init_get_bits(&gb, config, len*8);
+    ret = init_get_bits(&gb, config, len*8);
+    if (ret < 0)
+        return ret;
     audio_mux_version = get_bits(&gb, 1);
     same_time_framing = get_bits(&gb, 1);
     skip_bits(&gb, 6); /* num_sub_frames */

libavformat/rtpdec_mpeg4.c

@@ -124,6 +124,7 @@ static int rtp_parse_mp4_au(PayloadContext *data, const uint8_t *buf, int len)
 {
     int au_headers_length, au_header_size, i;
     GetBitContext getbitcontext;
+    int ret;
 
     if (len < 2)
         return AVERROR_INVALIDDATA;
@@ -144,7 +145,9 @@ static int rtp_parse_mp4_au(PayloadContext *data, const uint8_t *buf, int len)
     if (len < data->au_headers_length_bytes)
         return AVERROR_INVALIDDATA;
 
-    init_get_bits(&getbitcontext, buf, data->au_headers_length_bytes * 8);
+    ret = init_get_bits(&getbitcontext, buf, data->au_headers_length_bytes * 8);
+    if (ret < 0)
+        return ret;
 
     /* XXX: Wrong if optional additional sections are present (cts, dts etc...) */
     au_header_size = data->sizelength + data->indexlength;

libavformat/rtpdec_qt.c

@@ -82,7 +82,9 @@ static int qt_rtp_parse_packet(AVFormatContext *s, PayloadContext *qt,
      * The RTP payload is described in:
      * http://developer.apple.com/quicktime/icefloe/dispatch026.html
      */
-    init_get_bits(&gb, buf, len << 3);
+    ret = init_get_bits(&gb, buf, len << 3);
+    if (ret < 0)
+        return ret;
     ffio_init_context(&pb0, (uint8_t*)buf, len, 0, NULL, NULL, NULL, NULL);
 
     if (len < 4)