static int mxf_get_d10_aes3_packet(AVIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length) { const uint8_t *buf_ptr, *end_ptr; uint8_t *data_ptr; int i; if (length > 61444) /* worst case PAL 1920 samples 8 channels */ return -1; av_new_packet(pkt, length); avio_read(pb, pkt->data, length); data_ptr = pkt->data; end_ptr = pkt->data + length; buf_ptr = pkt->data + 4; /* skip SMPTE 331M header */ for (; buf_ptr < end_ptr; ) { for (i = 0; i < st->codec->channels; i++) { uint32_t sample = bytestream_get_le32(&buf_ptr); if (st->codec->bits_per_coded_sample == 24) bytestream_put_le24(&data_ptr, (sample >> 4) & 0xffffff); else bytestream_put_le16(&data_ptr, (sample >> 12) & 0xffff); } buf_ptr += 32 - st->codec->channels*4; // always 8 channels stored SMPTE 331M } pkt->size = data_ptr - pkt->data; return 0; }