+ uint32_t h;
+
+ h = AV_RB32(pkt->data);
+ if (ff_mpa_check_header(h) == 0) {
+ avpriv_mpegaudio_decode_header(&mpah, h);
+ if (!mp3->initial_bitrate)
+ mp3->initial_bitrate = mpah.bit_rate;
+ if ((mpah.bit_rate == 0) || (mp3->initial_bitrate != mpah.bit_rate))
+ mp3->has_variable_bitrate = 1;
+ } else {