static int amr_wb_decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPacket *avpkt) { const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; AMRWBContext *s = avctx->priv_data; int mode; int packet_size; static const uint8_t block_size[16] = {18, 24, 33, 37, 41, 47, 51, 59, 61, 6, 6, 0, 0, 0, 1, 1}; mode = (buf[0] >> 3) & 0x000F; packet_size = block_size[mode]; if (packet_size > buf_size) { av_log(avctx, AV_LOG_ERROR, "amr frame too short (%u, should be %u)\n", buf_size, packet_size + 1); return AVERROR_INVALIDDATA; } D_IF_decode(s->state, buf, data, _good_frame); *data_size = 320 * 2; return packet_size; }